TargetInfo.cpp revision 4b93d660c6326ec79b5e369317d1051cf826c2f3
182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov//===---- TargetInfo.cpp - Encapsulate target details -----------*- C++ -*-===// 2c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov// 3c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov// The LLVM Compiler Infrastructure 4c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov// 5c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov// This file is distributed under the University of Illinois Open Source 6c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov// License. See LICENSE.TXT for details. 7c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov// 8c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov//===----------------------------------------------------------------------===// 9c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov// 10c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov// These classes wrap the information about a call or function 11c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov// definition used to handle ABI compliancy. 12c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov// 13c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov//===----------------------------------------------------------------------===// 14c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1582d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov#include "TargetInfo.h" 16c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov#include "ABIInfo.h" 17c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov#include "CodeGenFunction.h" 1819cc4abea06a9b49e0e16a50d335c064cd723572Anders Carlsson#include "clang/AST/RecordLayout.h" 19c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov#include "llvm/Type.h" 209c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner#include "llvm/Target/TargetData.h" 212c0843f166a82f251b20370fadab57878969e7aaDaniel Dunbar#include "llvm/ADT/Triple.h" 2228df7a5813d94ff32904c31195d7f6fd74db8c53Daniel Dunbar#include "llvm/Support/raw_ostream.h" 23c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovusing namespace clang; 24c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovusing namespace CodeGen; 25c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 26aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCallstatic void AssignToArrayRange(CodeGen::CGBuilderTy &Builder, 27aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall llvm::Value *Array, 28aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall llvm::Value *Value, 29aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall unsigned FirstIndex, 30aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall unsigned LastIndex) { 31aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // Alternatively, we could emit this as a loop in the source. 32aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall for (unsigned I = FirstIndex; I <= LastIndex; ++I) { 33aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall llvm::Value *Cell = Builder.CreateConstInBoundsGEP1_32(Array, I); 34aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall Builder.CreateStore(Value, Cell); 35aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall } 36aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall} 37aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall 38d608cdb7c044365cf4e8764ade1e11e99c176078John McCallstatic bool isAggregateTypeForABI(QualType T) { 39d608cdb7c044365cf4e8764ade1e11e99c176078John McCall return CodeGenFunction::hasAggregateLLVMType(T) || 40d608cdb7c044365cf4e8764ade1e11e99c176078John McCall T->isMemberFunctionPointerType(); 41d608cdb7c044365cf4e8764ade1e11e99c176078John McCall} 42d608cdb7c044365cf4e8764ade1e11e99c176078John McCall 43c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton KorobeynikovABIInfo::~ABIInfo() {} 44c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 45ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris LattnerASTContext &ABIInfo::getContext() const { 46ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner return CGT.getContext(); 47ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner} 48ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner 49ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattnerllvm::LLVMContext &ABIInfo::getVMContext() const { 50ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner return CGT.getLLVMContext(); 51ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner} 52ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner 53ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattnerconst llvm::TargetData &ABIInfo::getTargetData() const { 54ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner return CGT.getTargetData(); 55ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner} 56ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner 57ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner 58c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovvoid ABIArgInfo::dump() const { 5928df7a5813d94ff32904c31195d7f6fd74db8c53Daniel Dunbar llvm::raw_ostream &OS = llvm::errs(); 6028df7a5813d94ff32904c31195d7f6fd74db8c53Daniel Dunbar OS << "(ABIArgInfo Kind="; 61c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov switch (TheKind) { 62c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case Direct: 63800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner OS << "Direct Type="; 64800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner if (const llvm::Type *Ty = getCoerceToType()) 65800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner Ty->print(OS); 66800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner else 67800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner OS << "null"; 68c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 69cc6fa88666ca2f287df4a600eb31a4087bab9c13Anton Korobeynikov case Extend: 7028df7a5813d94ff32904c31195d7f6fd74db8c53Daniel Dunbar OS << "Extend"; 71cc6fa88666ca2f287df4a600eb31a4087bab9c13Anton Korobeynikov break; 72c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case Ignore: 7328df7a5813d94ff32904c31195d7f6fd74db8c53Daniel Dunbar OS << "Ignore"; 74c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 75c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case Indirect: 76dc6d574155072bfb35a7a29b94ef3afa0d40fb5aDaniel Dunbar OS << "Indirect Align=" << getIndirectAlign() 77cf3b6f2504596812db1fcef0df8ce5b3449c4aacDaniel Dunbar << " Byal=" << getIndirectByVal() 78cf3b6f2504596812db1fcef0df8ce5b3449c4aacDaniel Dunbar << " Realign=" << getIndirectRealign(); 79c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 80c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case Expand: 8128df7a5813d94ff32904c31195d7f6fd74db8c53Daniel Dunbar OS << "Expand"; 82c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 83c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 8428df7a5813d94ff32904c31195d7f6fd74db8c53Daniel Dunbar OS << ")\n"; 85c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 86c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 8782d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton KorobeynikovTargetCodeGenInfo::~TargetCodeGenInfo() { delete Info; } 8882d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 8998303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbarstatic bool isEmptyRecord(ASTContext &Context, QualType T, bool AllowArrays); 90c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 91c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// isEmptyField - Return true iff a the field is "empty", that is it 92c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// is an unnamed bit-field or an (array of) empty record(s). 9398303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbarstatic bool isEmptyField(ASTContext &Context, const FieldDecl *FD, 9498303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar bool AllowArrays) { 95c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (FD->isUnnamedBitfield()) 96c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return true; 97c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 98c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov QualType FT = FD->getType(); 99c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 10098303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // Constant arrays of empty records count as empty, strip them off. 10198303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar if (AllowArrays) 10298303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar while (const ConstantArrayType *AT = Context.getAsConstantArrayType(FT)) 10398303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar FT = AT->getElementType(); 10498303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 1055ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar const RecordType *RT = FT->getAs<RecordType>(); 1065ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar if (!RT) 1075ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar return false; 1085ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar 1095ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar // C++ record fields are never empty, at least in the Itanium ABI. 1105ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar // 1115ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar // FIXME: We should use a predicate for whether this behavior is true in the 1125ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar // current ABI. 1135ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar if (isa<CXXRecordDecl>(RT->getDecl())) 1145ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar return false; 1155ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar 11698303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar return isEmptyRecord(Context, FT, AllowArrays); 117c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 118c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 119c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// isEmptyRecord - Return true iff a structure contains only empty 120c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// fields. Note that a structure with a flexible array member is not 121c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// considered empty. 12298303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbarstatic bool isEmptyRecord(ASTContext &Context, QualType T, bool AllowArrays) { 1236217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const RecordType *RT = T->getAs<RecordType>(); 124c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (!RT) 125c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return 0; 126c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov const RecordDecl *RD = RT->getDecl(); 127c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (RD->hasFlexibleArrayMember()) 128c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return false; 1295ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar 1305ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar // If this is a C++ record, check the bases first. 1315ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar if (const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(RD)) 1325ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar for (CXXRecordDecl::base_class_const_iterator i = CXXRD->bases_begin(), 1335ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar e = CXXRD->bases_end(); i != e; ++i) 1345ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar if (!isEmptyRecord(Context, i->getType(), true)) 1355ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar return false; 1365ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar 13717945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator i = RD->field_begin(), e = RD->field_end(); 13817945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i != e; ++i) 13998303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar if (!isEmptyField(Context, *i, AllowArrays)) 140c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return false; 141c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return true; 142c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 143c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1440a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson/// hasNonTrivialDestructorOrCopyConstructor - Determine if a type has either 1450a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson/// a non-trivial destructor or a non-trivial copy constructor. 1460a8f847e97f40cce51dc69051b964732333dc028Anders Carlssonstatic bool hasNonTrivialDestructorOrCopyConstructor(const RecordType *RT) { 1470a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl()); 1480a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson if (!RD) 1490a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson return false; 1508bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1510a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson return !RD->hasTrivialDestructor() || !RD->hasTrivialCopyConstructor(); 1520a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson} 1530a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson 1540a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson/// isRecordWithNonTrivialDestructorOrCopyConstructor - Determine if a type is 1550a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson/// a record type with either a non-trivial destructor or a non-trivial copy 1560a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson/// constructor. 1570a8f847e97f40cce51dc69051b964732333dc028Anders Carlssonstatic bool isRecordWithNonTrivialDestructorOrCopyConstructor(QualType T) { 1580a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson const RecordType *RT = T->getAs<RecordType>(); 1590a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson if (!RT) 1600a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson return false; 1610a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson 1620a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson return hasNonTrivialDestructorOrCopyConstructor(RT); 1630a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson} 1640a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson 165c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// isSingleElementStruct - Determine if a structure is a "single 166c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// element struct", i.e. it has exactly one non-empty field or 167c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// exactly one field which is itself a single element 168c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// struct. Structures with flexible array members are never 169c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// considered single element structs. 170c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// 171c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// \return The field declaration for the single non-empty field, if 172c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// it exists. 173c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovstatic const Type *isSingleElementStruct(QualType T, ASTContext &Context) { 174c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov const RecordType *RT = T->getAsStructureType(); 175c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (!RT) 176c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return 0; 177c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 178c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov const RecordDecl *RD = RT->getDecl(); 179c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (RD->hasFlexibleArrayMember()) 180c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return 0; 181c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 182c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov const Type *Found = 0; 1838bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1849430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar // If this is a C++ record, check the bases first. 1859430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar if (const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(RD)) { 1869430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar for (CXXRecordDecl::base_class_const_iterator i = CXXRD->bases_begin(), 1879430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar e = CXXRD->bases_end(); i != e; ++i) { 1889430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar // Ignore empty records. 1895ea68614bfe0e78b5d66339b781529038f86501fDaniel Dunbar if (isEmptyRecord(Context, i->getType(), true)) 1909430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar continue; 1919430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar 1929430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar // If we already found an element then this isn't a single-element struct. 1939430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar if (Found) 1949430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar return 0; 1959430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar 1969430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar // If this is non-empty and not a single element struct, the composite 1979430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar // cannot be a single element struct. 1989430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar Found = isSingleElementStruct(i->getType(), Context); 1999430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar if (!Found) 2009430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar return 0; 2019430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar } 2029430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar } 2039430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar 2049430d5a61598c47d827e1cd05f7cf3f110eeec9eDaniel Dunbar // Check for single element. 20517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator i = RD->field_begin(), e = RD->field_end(); 20617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i != e; ++i) { 207c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov const FieldDecl *FD = *i; 208c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov QualType FT = FD->getType(); 209c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 210c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Ignore empty fields. 21198303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar if (isEmptyField(Context, FD, true)) 212c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov continue; 213c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 214c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // If we already found an element then this isn't a single-element 215c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // struct. 216c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Found) 217c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return 0; 218c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 219c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Treat single element arrays as the element. 220c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov while (const ConstantArrayType *AT = Context.getAsConstantArrayType(FT)) { 221c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (AT->getSize().getZExtValue() != 1) 222c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 223c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov FT = AT->getElementType(); 224c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 225c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 226d608cdb7c044365cf4e8764ade1e11e99c176078John McCall if (!isAggregateTypeForABI(FT)) { 227c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Found = FT.getTypePtr(); 228c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } else { 229c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Found = isSingleElementStruct(FT, Context); 230c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (!Found) 231c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return 0; 232c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 233c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 234c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 235c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return Found; 236c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 237c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 238c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovstatic bool is32Or64BitBasicType(QualType Ty, ASTContext &Context) { 239a1842d32a1964712e42078e9b389dce9258c6a8cDaniel Dunbar if (!Ty->getAs<BuiltinType>() && !Ty->hasPointerRepresentation() && 24055e59e139d9ebcaae16d710472e28edbcafac98aDaniel Dunbar !Ty->isAnyComplexType() && !Ty->isEnumeralType() && 24155e59e139d9ebcaae16d710472e28edbcafac98aDaniel Dunbar !Ty->isBlockPointerType()) 242c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return false; 243c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 244c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov uint64_t Size = Context.getTypeSize(Ty); 245c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return Size == 32 || Size == 64; 246c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 247c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 24853012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar/// canExpandIndirectArgument - Test whether an argument type which is to be 24953012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar/// passed indirectly (on the stack) would have the equivalent layout if it was 25053012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar/// expanded into separate arguments. If so, we prefer to do the latter to avoid 25153012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar/// inhibiting optimizations. 25253012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar/// 25353012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar// FIXME: This predicate is missing many cases, currently it just follows 25453012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar// llvm-gcc (checks that all fields are 32-bit or 64-bit primitive types). We 25553012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar// should probably make this smarter, or better yet make the LLVM backend 25653012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar// capable of handling it. 25753012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbarstatic bool canExpandIndirectArgument(QualType Ty, ASTContext &Context) { 25853012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar // We can only expand structure types. 25953012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar const RecordType *RT = Ty->getAs<RecordType>(); 26053012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar if (!RT) 26153012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar return false; 26253012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar 26353012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar // We can only expand (C) structures. 26453012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar // 26553012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar // FIXME: This needs to be generalized to handle classes as well. 26653012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar const RecordDecl *RD = RT->getDecl(); 26753012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar if (!RD->isStruct() || isa<CXXRecordDecl>(RD)) 26853012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar return false; 26953012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar 27017945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator i = RD->field_begin(), e = RD->field_end(); 27117945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i != e; ++i) { 272c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov const FieldDecl *FD = *i; 273c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 274c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (!is32Or64BitBasicType(FD->getType(), Context)) 275c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return false; 276c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 277c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // FIXME: Reject bit-fields wholesale; there are two problems, we don't know 278c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // how to expand them yet, and the predicate for telling if a bitfield still 279c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // counts as "basic" is more complicated than what we were doing previously. 280c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (FD->isBitField()) 281c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return false; 282c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 283c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 284c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return true; 285c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 286c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 287c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovnamespace { 288c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// DefaultABIInfo - The default implementation for ABI specific 289c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// details. This implementation provides information which results in 290c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// self-consistent and sensible LLVM IR generation, but does not 291c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// conform to any particular ABI. 292c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovclass DefaultABIInfo : public ABIInfo { 293ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattnerpublic: 294ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner DefaultABIInfo(CodeGen::CodeGenTypes &CGT) : ABIInfo(CGT) {} 2958bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 296a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ABIArgInfo classifyReturnType(QualType RetTy) const; 297a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ABIArgInfo classifyArgumentType(QualType RetTy) const; 298c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 299ee5dcd064a811edc90f6c1fb31a837b6c961fed7Chris Lattner virtual void computeInfo(CGFunctionInfo &FI) const { 300a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner FI.getReturnInfo() = classifyReturnType(FI.getReturnType()); 301c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov for (CGFunctionInfo::arg_iterator it = FI.arg_begin(), ie = FI.arg_end(); 302c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov it != ie; ++it) 303a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner it->info = classifyArgumentType(it->type); 304c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 305c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 306c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov virtual llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 307c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CodeGenFunction &CGF) const; 308c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov}; 309c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 31082d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikovclass DefaultTargetCodeGenInfo : public TargetCodeGenInfo { 31182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikovpublic: 312ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner DefaultTargetCodeGenInfo(CodeGen::CodeGenTypes &CGT) 313ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner : TargetCodeGenInfo(new DefaultABIInfo(CGT)) {} 31482d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov}; 31582d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 31682d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikovllvm::Value *DefaultABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 31782d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov CodeGenFunction &CGF) const { 31882d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov return 0; 31982d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov} 32082d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 321a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris LattnerABIArgInfo DefaultABIInfo::classifyArgumentType(QualType Ty) const { 322d608cdb7c044365cf4e8764ade1e11e99c176078John McCall if (isAggregateTypeForABI(Ty)) 32382d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov return ABIArgInfo::getIndirect(0); 324dc6d574155072bfb35a7a29b94ef3afa0d40fb5aDaniel Dunbar 325a14db75641f377ef8b033c67653cd95ac4c36fe3Chris Lattner // Treat an enum type as its underlying type. 326a14db75641f377ef8b033c67653cd95ac4c36fe3Chris Lattner if (const EnumType *EnumTy = Ty->getAs<EnumType>()) 327a14db75641f377ef8b033c67653cd95ac4c36fe3Chris Lattner Ty = EnumTy->getDecl()->getIntegerType(); 328aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor 329a14db75641f377ef8b033c67653cd95ac4c36fe3Chris Lattner return (Ty->isPromotableIntegerType() ? 330a14db75641f377ef8b033c67653cd95ac4c36fe3Chris Lattner ABIArgInfo::getExtend() : ABIArgInfo::getDirect()); 33182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov} 33282d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 3330024f940dd15987b8ffbe6e787dcf860a9ea1effBob WilsonABIArgInfo DefaultABIInfo::classifyReturnType(QualType RetTy) const { 3340024f940dd15987b8ffbe6e787dcf860a9ea1effBob Wilson if (RetTy->isVoidType()) 3350024f940dd15987b8ffbe6e787dcf860a9ea1effBob Wilson return ABIArgInfo::getIgnore(); 3360024f940dd15987b8ffbe6e787dcf860a9ea1effBob Wilson 3370024f940dd15987b8ffbe6e787dcf860a9ea1effBob Wilson if (isAggregateTypeForABI(RetTy)) 3380024f940dd15987b8ffbe6e787dcf860a9ea1effBob Wilson return ABIArgInfo::getIndirect(0); 3390024f940dd15987b8ffbe6e787dcf860a9ea1effBob Wilson 3400024f940dd15987b8ffbe6e787dcf860a9ea1effBob Wilson // Treat an enum type as its underlying type. 3410024f940dd15987b8ffbe6e787dcf860a9ea1effBob Wilson if (const EnumType *EnumTy = RetTy->getAs<EnumType>()) 3420024f940dd15987b8ffbe6e787dcf860a9ea1effBob Wilson RetTy = EnumTy->getDecl()->getIntegerType(); 3430024f940dd15987b8ffbe6e787dcf860a9ea1effBob Wilson 3440024f940dd15987b8ffbe6e787dcf860a9ea1effBob Wilson return (RetTy->isPromotableIntegerType() ? 3450024f940dd15987b8ffbe6e787dcf860a9ea1effBob Wilson ABIArgInfo::getExtend() : ABIArgInfo::getDirect()); 3460024f940dd15987b8ffbe6e787dcf860a9ea1effBob Wilson} 3470024f940dd15987b8ffbe6e787dcf860a9ea1effBob Wilson 348bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling/// UseX86_MMXType - Return true if this is an MMX type that should use the special 349bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling/// x86_mmx type. 350bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendlingbool UseX86_MMXType(const llvm::Type *IRType) { 351bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling // If the type is an MMX type <2 x i32>, <4 x i16>, or <8 x i8>, use the 352bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling // special x86_mmx type. 353bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling return IRType->isVectorTy() && IRType->getPrimitiveSizeInBits() == 64 && 354bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling cast<llvm::VectorType>(IRType)->getElementType()->isIntegerTy() && 355bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling IRType->getScalarSizeInBits() != 64; 356bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling} 357bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling 3584b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbournestatic const llvm::Type* X86AdjustInlineAsmType(CodeGen::CodeGenFunction &CGF, 3594b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne llvm::StringRef Constraint, 3604b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne const llvm::Type* Ty) { 3614b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne if (Constraint=="y" && Ty->isVectorTy()) 3624b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne return llvm::Type::getX86_MMXTy(CGF.getLLVMContext()); 3634b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne return Ty; 3644b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne} 3654b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne 366dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner//===----------------------------------------------------------------------===// 367dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner// X86-32 ABI Implementation 368dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner//===----------------------------------------------------------------------===// 3698bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 370c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// X86_32ABIInfo - The X86-32 ABI information. 371c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovclass X86_32ABIInfo : public ABIInfo { 372fb67d6c3814524fdd43bd2fb159f7c594eae581cDaniel Dunbar static const unsigned MinABIStackAlignInBytes = 4; 373fb67d6c3814524fdd43bd2fb159f7c594eae581cDaniel Dunbar 3741e4249c10606f706aac181e6f5e8435ea99d9603David Chisnall bool IsDarwinVectorABI; 3751e4249c10606f706aac181e6f5e8435ea99d9603David Chisnall bool IsSmallStructInRegABI; 376c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 377c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov static bool isRegisterSize(unsigned Size) { 378c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return (Size == 8 || Size == 16 || Size == 32 || Size == 64); 379c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 380c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 381c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov static bool shouldReturnTypeInRegister(QualType Ty, ASTContext &Context); 382c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 383dc6d574155072bfb35a7a29b94ef3afa0d40fb5aDaniel Dunbar /// getIndirectResult - Give a source type \arg Ty, return a suitable result 384dc6d574155072bfb35a7a29b94ef3afa0d40fb5aDaniel Dunbar /// such that the argument will be passed in memory. 385a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ABIArgInfo getIndirectResult(QualType Ty, bool ByVal = true) const; 386dc6d574155072bfb35a7a29b94ef3afa0d40fb5aDaniel Dunbar 387fb67d6c3814524fdd43bd2fb159f7c594eae581cDaniel Dunbar /// \brief Return the alignment to use for the given type on the stack. 388e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar unsigned getTypeStackAlignInBytes(QualType Ty, unsigned Align) const; 389fb67d6c3814524fdd43bd2fb159f7c594eae581cDaniel Dunbar 390c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovpublic: 391c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 392a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ABIArgInfo classifyReturnType(QualType RetTy) const; 393a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ABIArgInfo classifyArgumentType(QualType RetTy) const; 394c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 395ee5dcd064a811edc90f6c1fb31a837b6c961fed7Chris Lattner virtual void computeInfo(CGFunctionInfo &FI) const { 396a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner FI.getReturnInfo() = classifyReturnType(FI.getReturnType()); 397c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov for (CGFunctionInfo::arg_iterator it = FI.arg_begin(), ie = FI.arg_end(); 398c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov it != ie; ++it) 399a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner it->info = classifyArgumentType(it->type); 400c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 401c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 402c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov virtual llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 403c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CodeGenFunction &CGF) const; 404c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 405ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner X86_32ABIInfo(CodeGen::CodeGenTypes &CGT, bool d, bool p) 406ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner : ABIInfo(CGT), IsDarwinVectorABI(d), IsSmallStructInRegABI(p) {} 407c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov}; 408c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 40982d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikovclass X86_32TargetCodeGenInfo : public TargetCodeGenInfo { 41082d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikovpublic: 411ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner X86_32TargetCodeGenInfo(CodeGen::CodeGenTypes &CGT, bool d, bool p) 412ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner :TargetCodeGenInfo(new X86_32ABIInfo(CGT, d, p)) {} 41374f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davis 41474f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davis void SetTargetAttributes(const Decl *D, llvm::GlobalValue *GV, 41574f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davis CodeGen::CodeGenModule &CGM) const; 4166374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 4176374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall int getDwarfEHStackPointer(CodeGen::CodeGenModule &CGM) const { 4186374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall // Darwin uses different dwarf register numbers for EH. 4196374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall if (CGM.isTargetDarwin()) return 5; 4206374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 4216374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall return 4; 4226374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall } 4236374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 4246374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall bool initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF, 4256374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall llvm::Value *Address) const; 4264b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne 4274b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne const llvm::Type* adjustInlineAsmType(CodeGen::CodeGenFunction &CGF, 4284b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne llvm::StringRef Constraint, 4294b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne const llvm::Type* Ty) const { 4304b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne return X86AdjustInlineAsmType(CGF, Constraint, Ty); 4314b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne } 4324b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne 43382d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov}; 43482d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 43582d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov} 436c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 437c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// shouldReturnTypeInRegister - Determine if the given type should be 438c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// passed in a register (for the Darwin ABI). 439c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovbool X86_32ABIInfo::shouldReturnTypeInRegister(QualType Ty, 440c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov ASTContext &Context) { 441c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov uint64_t Size = Context.getTypeSize(Ty); 442c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 443c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Type must be register sized. 444c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (!isRegisterSize(Size)) 445c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return false; 446c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 447c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Ty->isVectorType()) { 448c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 64- and 128- bit vectors inside structures are not returned in 449c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // registers. 450c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Size == 64 || Size == 128) 451c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return false; 452c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 453c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return true; 454c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 455c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 4567711523d948bbe635f690f5795ef7ea9a3289eb2Daniel Dunbar // If this is a builtin, pointer, enum, complex type, member pointer, or 4577711523d948bbe635f690f5795ef7ea9a3289eb2Daniel Dunbar // member function pointer it is ok. 458a1842d32a1964712e42078e9b389dce9258c6a8cDaniel Dunbar if (Ty->getAs<BuiltinType>() || Ty->hasPointerRepresentation() || 45955e59e139d9ebcaae16d710472e28edbcafac98aDaniel Dunbar Ty->isAnyComplexType() || Ty->isEnumeralType() || 4607711523d948bbe635f690f5795ef7ea9a3289eb2Daniel Dunbar Ty->isBlockPointerType() || Ty->isMemberPointerType()) 461c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return true; 462c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 463c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Arrays are treated like records. 464c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (const ConstantArrayType *AT = Context.getAsConstantArrayType(Ty)) 465c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return shouldReturnTypeInRegister(AT->getElementType(), Context); 466c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 467c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Otherwise, it must be a record type. 4686217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const RecordType *RT = Ty->getAs<RecordType>(); 469c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (!RT) return false; 470c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 471a887423cf580e19b2d03e3a0499c065730c96b28Anders Carlsson // FIXME: Traverse bases here too. 472a887423cf580e19b2d03e3a0499c065730c96b28Anders Carlsson 473c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Structure types are passed in register if all fields would be 474c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // passed in a register. 47517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator i = RT->getDecl()->field_begin(), 47617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis e = RT->getDecl()->field_end(); i != e; ++i) { 477c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov const FieldDecl *FD = *i; 478c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 479c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Empty fields are ignored. 48098303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar if (isEmptyField(Context, FD, true)) 481c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov continue; 482c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 483c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Check fields recursively. 484c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (!shouldReturnTypeInRegister(FD->getType(), Context)) 485c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return false; 486c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 487c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 488c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return true; 489c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 490c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 491a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris LattnerABIArgInfo X86_32ABIInfo::classifyReturnType(QualType RetTy) const { 492a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner if (RetTy->isVoidType()) 493c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return ABIArgInfo::getIgnore(); 4948bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 495a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner if (const VectorType *VT = RetTy->getAs<VectorType>()) { 496c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // On Darwin, some vectors are returned in registers. 4971e4249c10606f706aac181e6f5e8435ea99d9603David Chisnall if (IsDarwinVectorABI) { 498a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner uint64_t Size = getContext().getTypeSize(RetTy); 499c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 500c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 128-bit vectors are a special case; they are returned in 501c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // registers and we need to make sure to pick a type the LLVM 502c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // backend will like. 503c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Size == 128) 504800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner return ABIArgInfo::getDirect(llvm::VectorType::get( 505a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner llvm::Type::getInt64Ty(getVMContext()), 2)); 506c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 507c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Always return in register if it fits in a general purpose 508c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // register, or if it is 64 bits and has a single element. 509c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if ((Size == 8 || Size == 16 || Size == 32) || 510c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov (Size == 64 && VT->getNumElements() == 1)) 511800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner return ABIArgInfo::getDirect(llvm::IntegerType::get(getVMContext(), 512a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner Size)); 513c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 514c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return ABIArgInfo::getIndirect(0); 515c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 516c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 517c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return ABIArgInfo::getDirect(); 518a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner } 5198bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 520d608cdb7c044365cf4e8764ade1e11e99c176078John McCall if (isAggregateTypeForABI(RetTy)) { 521a887423cf580e19b2d03e3a0499c065730c96b28Anders Carlsson if (const RecordType *RT = RetTy->getAs<RecordType>()) { 52240092972b591646b47037d2b46b695a4014df413Anders Carlsson // Structures with either a non-trivial destructor or a non-trivial 52340092972b591646b47037d2b46b695a4014df413Anders Carlsson // copy constructor are always indirect. 52440092972b591646b47037d2b46b695a4014df413Anders Carlsson if (hasNonTrivialDestructorOrCopyConstructor(RT)) 52540092972b591646b47037d2b46b695a4014df413Anders Carlsson return ABIArgInfo::getIndirect(0, /*ByVal=*/false); 5268bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 52740092972b591646b47037d2b46b695a4014df413Anders Carlsson // Structures with flexible arrays are always indirect. 528c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (RT->getDecl()->hasFlexibleArrayMember()) 529c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return ABIArgInfo::getIndirect(0); 53040092972b591646b47037d2b46b695a4014df413Anders Carlsson } 5318bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 5321e4249c10606f706aac181e6f5e8435ea99d9603David Chisnall // If specified, structs and unions are always indirect. 5331e4249c10606f706aac181e6f5e8435ea99d9603David Chisnall if (!IsSmallStructInRegABI && !RetTy->isAnyComplexType()) 534c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return ABIArgInfo::getIndirect(0); 535c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 536c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Classify "single element" structs as their element type. 537a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner if (const Type *SeltTy = isSingleElementStruct(RetTy, getContext())) { 538183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall if (const BuiltinType *BT = SeltTy->getAs<BuiltinType>()) { 539c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (BT->isIntegerType()) { 540c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // We need to use the size of the structure, padding 541c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // bit-fields can adjust that to be larger than the single 542c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // element type. 543a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner uint64_t Size = getContext().getTypeSize(RetTy); 544800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner return ABIArgInfo::getDirect( 545a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner llvm::IntegerType::get(getVMContext(), (unsigned)Size)); 546a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner } 5478bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 548a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner if (BT->getKind() == BuiltinType::Float) { 549a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner assert(getContext().getTypeSize(RetTy) == 550a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner getContext().getTypeSize(SeltTy) && 551c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov "Unexpect single element structure size!"); 552800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner return ABIArgInfo::getDirect(llvm::Type::getFloatTy(getVMContext())); 553a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner } 5548bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 555a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner if (BT->getKind() == BuiltinType::Double) { 556a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner assert(getContext().getTypeSize(RetTy) == 557a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner getContext().getTypeSize(SeltTy) && 558c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov "Unexpect single element structure size!"); 559800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner return ABIArgInfo::getDirect(llvm::Type::getDoubleTy(getVMContext())); 560c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 561c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } else if (SeltTy->isPointerType()) { 562c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // FIXME: It would be really nice if this could come out as the proper 563c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // pointer type. 564a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner const llvm::Type *PtrTy = llvm::Type::getInt8PtrTy(getVMContext()); 565800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner return ABIArgInfo::getDirect(PtrTy); 566c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } else if (SeltTy->isVectorType()) { 567c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 64- and 128-bit vectors are never returned in a 568c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // register when inside a structure. 569a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner uint64_t Size = getContext().getTypeSize(RetTy); 570c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Size == 64 || Size == 128) 571c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return ABIArgInfo::getIndirect(0); 572c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 573a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner return classifyReturnType(QualType(SeltTy, 0)); 574c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 575c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 576c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 577c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Small structures which are register sized are generally returned 578c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // in a register. 579a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner if (X86_32ABIInfo::shouldReturnTypeInRegister(RetTy, getContext())) { 580a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner uint64_t Size = getContext().getTypeSize(RetTy); 581800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner return ABIArgInfo::getDirect(llvm::IntegerType::get(getVMContext(),Size)); 582c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 583c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 584c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return ABIArgInfo::getIndirect(0); 585c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 5868bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 587a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner // Treat an enum type as its underlying type. 588a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner if (const EnumType *EnumTy = RetTy->getAs<EnumType>()) 589a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner RetTy = EnumTy->getDecl()->getIntegerType(); 590a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner 591a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner return (RetTy->isPromotableIntegerType() ? 592a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ABIArgInfo::getExtend() : ABIArgInfo::getDirect()); 593c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 594c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 59593ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbarstatic bool isRecordWithSSEVectorType(ASTContext &Context, QualType Ty) { 59693ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar const RecordType *RT = Ty->getAs<RecordType>(); 59793ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar if (!RT) 59893ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar return 0; 59993ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar const RecordDecl *RD = RT->getDecl(); 60093ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar 60193ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar // If this is a C++ record, check the bases first. 60293ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar if (const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(RD)) 60393ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar for (CXXRecordDecl::base_class_const_iterator i = CXXRD->bases_begin(), 60493ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar e = CXXRD->bases_end(); i != e; ++i) 60593ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar if (!isRecordWithSSEVectorType(Context, i->getType())) 60693ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar return false; 60793ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar 60893ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar for (RecordDecl::field_iterator i = RD->field_begin(), e = RD->field_end(); 60993ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar i != e; ++i) { 61093ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar QualType FT = i->getType(); 61193ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar 61293ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar if (FT->getAs<VectorType>() && Context.getTypeSize(Ty) == 128) 61393ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar return true; 61493ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar 61593ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar if (isRecordWithSSEVectorType(Context, FT)) 61693ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar return true; 61793ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar } 61893ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar 61993ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar return false; 62093ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar} 62193ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar 622e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbarunsigned X86_32ABIInfo::getTypeStackAlignInBytes(QualType Ty, 623e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar unsigned Align) const { 624e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar // Otherwise, if the alignment is less than or equal to the minimum ABI 625e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar // alignment, just use the default; the backend will handle this. 626fb67d6c3814524fdd43bd2fb159f7c594eae581cDaniel Dunbar if (Align <= MinABIStackAlignInBytes) 627e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar return 0; // Use default alignment. 628e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar 629e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar // On non-Darwin, the stack type alignment is always 4. 630e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar if (!IsDarwinVectorABI) { 631e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar // Set explicit alignment, since we may need to realign the top. 632fb67d6c3814524fdd43bd2fb159f7c594eae581cDaniel Dunbar return MinABIStackAlignInBytes; 633e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar } 634fb67d6c3814524fdd43bd2fb159f7c594eae581cDaniel Dunbar 63593ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar // Otherwise, if the type contains an SSE vector type, the alignment is 16. 63693ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar if (isRecordWithSSEVectorType(getContext(), Ty)) 63793ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar return 16; 63893ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar 63993ae947df36133c7a26a0c7d325c0679916ed2edDaniel Dunbar return MinABIStackAlignInBytes; 640fb67d6c3814524fdd43bd2fb159f7c594eae581cDaniel Dunbar} 641fb67d6c3814524fdd43bd2fb159f7c594eae581cDaniel Dunbar 642a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris LattnerABIArgInfo X86_32ABIInfo::getIndirectResult(QualType Ty, bool ByVal) const { 64346c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar if (!ByVal) 64446c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar return ABIArgInfo::getIndirect(0, false); 64546c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar 646e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar // Compute the byval alignment. 647e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar unsigned TypeAlign = getContext().getTypeAlign(Ty) / 8; 648e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar unsigned StackAlign = getTypeStackAlignInBytes(Ty, TypeAlign); 649e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar if (StackAlign == 0) 650e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar return ABIArgInfo::getIndirect(0); 651e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar 652e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar // If the stack alignment is less than the type alignment, realign the 653e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar // argument. 654e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar if (StackAlign < TypeAlign) 655e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar return ABIArgInfo::getIndirect(StackAlign, /*ByVal=*/true, 656e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar /*Realign=*/true); 657e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar 658e59d8585bb40a8bae6b847ad258536a2c01f20eaDaniel Dunbar return ABIArgInfo::getIndirect(StackAlign); 659dc6d574155072bfb35a7a29b94ef3afa0d40fb5aDaniel Dunbar} 660dc6d574155072bfb35a7a29b94ef3afa0d40fb5aDaniel Dunbar 661a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris LattnerABIArgInfo X86_32ABIInfo::classifyArgumentType(QualType Ty) const { 662c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // FIXME: Set alignment on indirect arguments. 663d608cdb7c044365cf4e8764ade1e11e99c176078John McCall if (isAggregateTypeForABI(Ty)) { 664c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Structures with flexible arrays are always indirect. 665a887423cf580e19b2d03e3a0499c065730c96b28Anders Carlsson if (const RecordType *RT = Ty->getAs<RecordType>()) { 666a887423cf580e19b2d03e3a0499c065730c96b28Anders Carlsson // Structures with either a non-trivial destructor or a non-trivial 667a887423cf580e19b2d03e3a0499c065730c96b28Anders Carlsson // copy constructor are always indirect. 668a887423cf580e19b2d03e3a0499c065730c96b28Anders Carlsson if (hasNonTrivialDestructorOrCopyConstructor(RT)) 669a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner return getIndirectResult(Ty, /*ByVal=*/false); 670dc6d574155072bfb35a7a29b94ef3afa0d40fb5aDaniel Dunbar 671c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (RT->getDecl()->hasFlexibleArrayMember()) 672a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner return getIndirectResult(Ty); 673a887423cf580e19b2d03e3a0499c065730c96b28Anders Carlsson } 674c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 675c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Ignore empty structs. 676a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner if (Ty->isStructureType() && getContext().getTypeSize(Ty) == 0) 677c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return ABIArgInfo::getIgnore(); 678c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 67953012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar // Expand small (<= 128-bit) record types when we know that the stack layout 68053012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar // of those arguments will match the struct. This is important because the 68153012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar // LLVM backend isn't smart enough to remove byval, which inhibits many 68253012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar // optimizations. 683a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner if (getContext().getTypeSize(Ty) <= 4*32 && 684a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner canExpandIndirectArgument(Ty, getContext())) 68553012f447145bfd5e3a759f069a2bdf2b6705708Daniel Dunbar return ABIArgInfo::getExpand(); 686c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 687a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner return getIndirectResult(Ty); 6888bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer } 6898bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 690bbae8b40cd37d5b2815f8450cb588a41da89d7e5Chris Lattner if (const VectorType *VT = Ty->getAs<VectorType>()) { 6917b733505defd34f1bb7e74d9526be0bc41e76693Chris Lattner // On Darwin, some vectors are passed in memory, we handle this by passing 6927b733505defd34f1bb7e74d9526be0bc41e76693Chris Lattner // it as an i8/i16/i32/i64. 693bbae8b40cd37d5b2815f8450cb588a41da89d7e5Chris Lattner if (IsDarwinVectorABI) { 694bbae8b40cd37d5b2815f8450cb588a41da89d7e5Chris Lattner uint64_t Size = getContext().getTypeSize(Ty); 695bbae8b40cd37d5b2815f8450cb588a41da89d7e5Chris Lattner if ((Size == 8 || Size == 16 || Size == 32) || 696bbae8b40cd37d5b2815f8450cb588a41da89d7e5Chris Lattner (Size == 64 && VT->getNumElements() == 1)) 697bbae8b40cd37d5b2815f8450cb588a41da89d7e5Chris Lattner return ABIArgInfo::getDirect(llvm::IntegerType::get(getVMContext(), 698bbae8b40cd37d5b2815f8450cb588a41da89d7e5Chris Lattner Size)); 699bbae8b40cd37d5b2815f8450cb588a41da89d7e5Chris Lattner } 700bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling 701bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling const llvm::Type *IRType = CGT.ConvertTypeRecursive(Ty); 702bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling if (UseX86_MMXType(IRType)) { 703bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling ABIArgInfo AAI = ABIArgInfo::getDirect(IRType); 704bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling AAI.setCoerceToType(llvm::Type::getX86_MMXTy(getVMContext())); 705bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling return AAI; 706bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling } 7079cac4942b920d4c5514e71949e3062ed626bfbdfMichael J. Spencer 708bbae8b40cd37d5b2815f8450cb588a41da89d7e5Chris Lattner return ABIArgInfo::getDirect(); 709bbae8b40cd37d5b2815f8450cb588a41da89d7e5Chris Lattner } 7109cac4942b920d4c5514e71949e3062ed626bfbdfMichael J. Spencer 7119cac4942b920d4c5514e71949e3062ed626bfbdfMichael J. Spencer 712a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner if (const EnumType *EnumTy = Ty->getAs<EnumType>()) 713a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner Ty = EnumTy->getDecl()->getIntegerType(); 714aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor 715a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner return (Ty->isPromotableIntegerType() ? 716a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ABIArgInfo::getExtend() : ABIArgInfo::getDirect()); 717c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 718c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 719c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovllvm::Value *X86_32ABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 720c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CodeGenFunction &CGF) const { 7213c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *BP = llvm::Type::getInt8PtrTy(CGF.getLLVMContext()); 72296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson const llvm::Type *BPP = llvm::PointerType::getUnqual(BP); 723c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 724c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGBuilderTy &Builder = CGF.Builder; 725c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *VAListAddrAsBPP = Builder.CreateBitCast(VAListAddr, BPP, 726c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov "ap"); 727c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *Addr = Builder.CreateLoad(VAListAddrAsBPP, "ap.cur"); 728c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Type *PTy = 72996e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(CGF.ConvertType(Ty)); 730c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *AddrTyped = Builder.CreateBitCast(Addr, PTy); 731c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 732c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov uint64_t Offset = 733c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::RoundUpToAlignment(CGF.getContext().getTypeSize(Ty) / 8, 4); 734c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *NextAddr = 73577b89b87c3b9220fea1bc80f6d6598d2003cc8a8Chris Lattner Builder.CreateGEP(Addr, llvm::ConstantInt::get(CGF.Int32Ty, Offset), 736c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov "ap.next"); 737c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Builder.CreateStore(NextAddr, VAListAddrAsBPP); 738c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 739c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return AddrTyped; 740c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 741c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 74274f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davisvoid X86_32TargetCodeGenInfo::SetTargetAttributes(const Decl *D, 74374f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davis llvm::GlobalValue *GV, 74474f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davis CodeGen::CodeGenModule &CGM) const { 74574f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davis if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 74674f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davis if (FD->hasAttr<X86ForceAlignArgPointerAttr>()) { 74774f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davis // Get the LLVM function. 74874f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davis llvm::Function *Fn = cast<llvm::Function>(GV); 74974f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davis 75074f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davis // Now add the 'alignstack' attribute with a value of 16. 75174f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davis Fn->addFnAttr(llvm::Attribute::constructStackAlignmentFromInt(16)); 75274f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davis } 75374f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davis } 75474f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davis} 75574f7293eb30bf77355c20a3c2cad7b67d8ce7388Charles Davis 7566374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCallbool X86_32TargetCodeGenInfo::initDwarfEHRegSizeTable( 7576374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall CodeGen::CodeGenFunction &CGF, 7586374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall llvm::Value *Address) const { 7596374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall CodeGen::CGBuilderTy &Builder = CGF.Builder; 7606374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall llvm::LLVMContext &Context = CGF.getLLVMContext(); 7616374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 7626374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall const llvm::IntegerType *i8 = llvm::Type::getInt8Ty(Context); 7636374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall llvm::Value *Four8 = llvm::ConstantInt::get(i8, 4); 7648bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 7656374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall // 0-7 are the eight integer registers; the order is different 7666374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall // on Darwin (for EH), but the range is the same. 7676374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall // 8 is %eip. 768aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall AssignToArrayRange(Builder, Address, Four8, 0, 8); 7696374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 7706374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall if (CGF.CGM.isTargetDarwin()) { 7716374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall // 12-16 are st(0..4). Not sure why we stop at 4. 7726374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall // These have size 16, which is sizeof(long double) on 7736374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall // platforms with 8-byte alignment for that type. 7746374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall llvm::Value *Sixteen8 = llvm::ConstantInt::get(i8, 16); 775aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall AssignToArrayRange(Builder, Address, Sixteen8, 12, 16); 7768bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 7776374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall } else { 7786374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall // 9 is %eflags, which doesn't get a size on Darwin for some 7796374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall // reason. 7806374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall Builder.CreateStore(Four8, Builder.CreateConstInBoundsGEP1_32(Address, 9)); 7816374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 7826374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall // 11-16 are st(0..5). Not sure why we stop at 5. 7836374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall // These have size 12, which is sizeof(long double) on 7846374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall // platforms with 4-byte alignment for that type. 7856374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall llvm::Value *Twelve8 = llvm::ConstantInt::get(i8, 12); 786aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall AssignToArrayRange(Builder, Address, Twelve8, 11, 16); 787aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall } 7886374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 7896374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall return false; 7906374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall} 7916374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 792dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner//===----------------------------------------------------------------------===// 793dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner// X86-64 ABI Implementation 794dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner//===----------------------------------------------------------------------===// 795dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner 796dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner 797c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovnamespace { 798c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov/// X86_64ABIInfo - The X86_64 ABI information. 799c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovclass X86_64ABIInfo : public ABIInfo { 800c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov enum Class { 801c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Integer = 0, 802c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov SSE, 803c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov SSEUp, 804c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov X87, 805c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov X87Up, 806c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov ComplexX87, 807c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov NoClass, 808c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Memory 809c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov }; 810c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 811c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// merge - Implement the X86_64 ABI merging algorithm. 812c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// 813c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// Merge an accumulating classification \arg Accum with a field 814c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// classification \arg Field. 815c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// 816c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// \param Accum - The accumulating classification. This should 817c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// always be either NoClass or the result of a previous merge 818c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// call. In addition, this should never be Memory (the caller 819c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// should just return Memory for the aggregate). 8201090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner static Class merge(Class Accum, Class Field); 821c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 822c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// classify - Determine the x86_64 register classes in which the 823c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// given type T should be passed. 824c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// 825c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// \param Lo - The classification for the parts of the type 826c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// residing in the low word of the containing object. 827c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// 828c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// \param Hi - The classification for the parts of the type 829c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// residing in the high word of the containing object. 830c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// 831c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// \param OffsetBase - The bit offset of this type in the 832c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// containing object. Some parameters are classified different 833c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// depending on whether they straddle an eightbyte boundary. 834c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// 835c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// If a word is unused its result will be NoClass; if a type should 836c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// be passed in Memory then at least the classification of \arg Lo 837c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// will be Memory. 838c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// 839c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// The \arg Lo class will be NoClass iff the argument is ignored. 840c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// 841c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// If the \arg Lo class is ComplexX87, then the \arg Hi class will 842c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// also be ComplexX87. 8439c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner void classify(QualType T, uint64_t OffsetBase, Class &Lo, Class &Hi) const; 844c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 8450f408f5242522cbede304472e17931357c1b573dChris Lattner const llvm::Type *Get16ByteVectorType(QualType Ty) const; 846603519d269d48dca99927f0ad65e92099bd76161Chris Lattner const llvm::Type *GetSSETypeAtOffset(const llvm::Type *IRType, 847f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattner unsigned IROffset, QualType SourceTy, 848f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattner unsigned SourceOffset) const; 8490d2656d77053cc2ed6f3a3acdf12d67807c7f3a2Chris Lattner const llvm::Type *GetINTEGERTypeAtOffset(const llvm::Type *IRType, 8500d2656d77053cc2ed6f3a3acdf12d67807c7f3a2Chris Lattner unsigned IROffset, QualType SourceTy, 8510d2656d77053cc2ed6f3a3acdf12d67807c7f3a2Chris Lattner unsigned SourceOffset) const; 8528bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 853c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// getIndirectResult - Give a source type \arg Ty, return a suitable result 85446c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar /// such that the argument will be returned in memory. 8559c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner ABIArgInfo getIndirectReturnResult(QualType Ty) const; 85646c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar 85746c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar /// getIndirectResult - Give a source type \arg Ty, return a suitable result 858c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov /// such that the argument will be passed in memory. 8599c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner ABIArgInfo getIndirectResult(QualType Ty) const; 860c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 861a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ABIArgInfo classifyReturnType(QualType RetTy) const; 862c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 863bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling ABIArgInfo classifyArgumentType(QualType Ty, 864bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling unsigned &neededInt, 86599aaae87ae972ac2dd4cccd8b4886537aabaff43Bill Wendling unsigned &neededSSE) const; 866c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 867c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovpublic: 868ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner X86_64ABIInfo(CodeGen::CodeGenTypes &CGT) : ABIInfo(CGT) {} 8699c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner 870ee5dcd064a811edc90f6c1fb31a837b6c961fed7Chris Lattner virtual void computeInfo(CGFunctionInfo &FI) const; 871c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 872c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov virtual llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 873c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CodeGenFunction &CGF) const; 874c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov}; 87582d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 876f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner/// WinX86_64ABIInfo - The Windows X86_64 ABI information. 877a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumiclass WinX86_64ABIInfo : public ABIInfo { 878a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi 879a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi ABIArgInfo classify(QualType Ty) const; 880a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi 881f13721dd91dda7675e499331a2770308ad20ca61Chris Lattnerpublic: 882a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi WinX86_64ABIInfo(CodeGen::CodeGenTypes &CGT) : ABIInfo(CGT) {} 883a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi 884a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi virtual void computeInfo(CGFunctionInfo &FI) const; 885f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner 886f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner virtual llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 887f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner CodeGenFunction &CGF) const; 888f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner}; 889f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner 89082d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikovclass X86_64TargetCodeGenInfo : public TargetCodeGenInfo { 89182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikovpublic: 892ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner X86_64TargetCodeGenInfo(CodeGen::CodeGenTypes &CGT) 893ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner : TargetCodeGenInfo(new X86_64ABIInfo(CGT)) {} 8946374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 8956374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall int getDwarfEHStackPointer(CodeGen::CodeGenModule &CGM) const { 8966374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall return 7; 8976374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall } 8986374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 8996374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall bool initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF, 9006374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall llvm::Value *Address) const { 9016374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall CodeGen::CGBuilderTy &Builder = CGF.Builder; 9026374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall llvm::LLVMContext &Context = CGF.getLLVMContext(); 9036374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 9046374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall const llvm::IntegerType *i8 = llvm::Type::getInt8Ty(Context); 9056374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall llvm::Value *Eight8 = llvm::ConstantInt::get(i8, 8); 9068bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 907aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // 0-15 are the 16 integer registers. 908aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // 16 is %rip. 909aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall AssignToArrayRange(Builder, Address, Eight8, 0, 16); 9106374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 9116374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall return false; 9126374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall } 9134b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne 9144b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne const llvm::Type* adjustInlineAsmType(CodeGen::CodeGenFunction &CGF, 9154b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne llvm::StringRef Constraint, 9164b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne const llvm::Type* Ty) const { 9174b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne return X86AdjustInlineAsmType(CGF, Constraint, Ty); 9184b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne } 9194b93d660c6326ec79b5e369317d1051cf826c2f3Peter Collingbourne 92082d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov}; 92182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 922f13721dd91dda7675e499331a2770308ad20ca61Chris Lattnerclass WinX86_64TargetCodeGenInfo : public TargetCodeGenInfo { 923f13721dd91dda7675e499331a2770308ad20ca61Chris Lattnerpublic: 924f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner WinX86_64TargetCodeGenInfo(CodeGen::CodeGenTypes &CGT) 925f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner : TargetCodeGenInfo(new WinX86_64ABIInfo(CGT)) {} 926f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner 927f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner int getDwarfEHStackPointer(CodeGen::CodeGenModule &CGM) const { 928f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner return 7; 929f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner } 930f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner 931f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner bool initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF, 932f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner llvm::Value *Address) const { 933f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner CodeGen::CGBuilderTy &Builder = CGF.Builder; 934f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner llvm::LLVMContext &Context = CGF.getLLVMContext(); 935f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner 936f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner const llvm::IntegerType *i8 = llvm::Type::getInt8Ty(Context); 937f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner llvm::Value *Eight8 = llvm::ConstantInt::get(i8, 8); 9389cac4942b920d4c5514e71949e3062ed626bfbdfMichael J. Spencer 939f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner // 0-15 are the 16 integer registers. 940f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner // 16 is %rip. 941f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner AssignToArrayRange(Builder, Address, Eight8, 0, 16); 942f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner 943f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner return false; 944f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner } 945f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner}; 946f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner 947c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 948c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 9491090a9ba0902380dbd97d0a500daa4c373712df9Chris LattnerX86_64ABIInfo::Class X86_64ABIInfo::merge(Class Accum, Class Field) { 950c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p2: Rule 4. Each field of an object is 951c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // classified recursively so that always two fields are 952c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // considered. The resulting class is calculated according to 953c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // the classes of the fields in the eightbyte: 954c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 955c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // (a) If both classes are equal, this is the resulting class. 956c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 957c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // (b) If one of the classes is NO_CLASS, the resulting class is 958c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // the other class. 959c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 960c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // (c) If one of the classes is MEMORY, the result is the MEMORY 961c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // class. 962c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 963c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // (d) If one of the classes is INTEGER, the result is the 964c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // INTEGER. 965c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 966c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // (e) If one of the classes is X87, X87UP, COMPLEX_X87 class, 967c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // MEMORY is used as class. 968c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 969c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // (f) Otherwise class SSE is used. 970c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 971c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Accum should never be memory (we should have returned) or 972c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // ComplexX87 (because this cannot be passed in a structure). 973c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov assert((Accum != Memory && Accum != ComplexX87) && 974c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov "Invalid accumulated classification during merge."); 975c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Accum == Field || Field == NoClass) 976c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return Accum; 9771090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner if (Field == Memory) 978c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return Memory; 9791090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner if (Accum == NoClass) 980c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return Field; 9811090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner if (Accum == Integer || Field == Integer) 982c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return Integer; 9831090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner if (Field == X87 || Field == X87Up || Field == ComplexX87 || 9841090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner Accum == X87 || Accum == X87Up) 985c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return Memory; 9861090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner return SSE; 987c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 988c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 989bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattnervoid X86_64ABIInfo::classify(QualType Ty, uint64_t OffsetBase, 990c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Class &Lo, Class &Hi) const { 991c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // FIXME: This code can be simplified by introducing a simple value class for 992c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Class pairs with appropriate constructor methods for the various 993c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // situations. 994c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 995c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // FIXME: Some of the split computations are wrong; unaligned vectors 996c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // shouldn't be passed in registers for example, so there is no chance they 997c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // can straddle an eightbyte. Verify & simplify. 998c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 999c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Lo = Hi = NoClass; 1000c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1001c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Class &Current = OffsetBase < 64 ? Lo : Hi; 1002c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Current = Memory; 1003c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1004183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall if (const BuiltinType *BT = Ty->getAs<BuiltinType>()) { 1005c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov BuiltinType::Kind k = BT->getKind(); 1006c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1007c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (k == BuiltinType::Void) { 1008c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Current = NoClass; 1009c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } else if (k == BuiltinType::Int128 || k == BuiltinType::UInt128) { 1010c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Lo = Integer; 1011c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Hi = Integer; 1012c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } else if (k >= BuiltinType::Bool && k <= BuiltinType::LongLong) { 1013c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Current = Integer; 1014c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } else if (k == BuiltinType::Float || k == BuiltinType::Double) { 1015c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Current = SSE; 1016c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } else if (k == BuiltinType::LongDouble) { 1017c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Lo = X87; 1018c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Hi = X87Up; 1019c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 1020c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // FIXME: _Decimal32 and _Decimal64 are SSE. 1021c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // FIXME: _float128 and _Decimal128 are (SSE, SSEUp). 10221090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner return; 10231090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner } 10248bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 10251090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner if (const EnumType *ET = Ty->getAs<EnumType>()) { 1026c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Classify the underlying integer type. 10279c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner classify(ET->getDecl()->getIntegerType(), OffsetBase, Lo, Hi); 10281090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner return; 10291090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner } 10308bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 10311090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner if (Ty->hasPointerRepresentation()) { 1032c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Current = Integer; 10331090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner return; 10341090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner } 10358bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 10361090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner if (Ty->isMemberPointerType()) { 103767d438d39a1cc37c372a2684dc354f58d0169bb1Daniel Dunbar if (Ty->isMemberFunctionPointerType()) 103867d438d39a1cc37c372a2684dc354f58d0169bb1Daniel Dunbar Lo = Hi = Integer; 103967d438d39a1cc37c372a2684dc354f58d0169bb1Daniel Dunbar else 104067d438d39a1cc37c372a2684dc354f58d0169bb1Daniel Dunbar Current = Integer; 10411090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner return; 10421090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner } 10438bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 10441090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner if (const VectorType *VT = Ty->getAs<VectorType>()) { 1045ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner uint64_t Size = getContext().getTypeSize(VT); 1046c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Size == 32) { 1047c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // gcc passes all <4 x char>, <2 x short>, <1 x int>, <1 x 1048c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // float> as integer. 1049c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Current = Integer; 1050c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1051c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // If this type crosses an eightbyte boundary, it should be 1052c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // split. 1053c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov uint64_t EB_Real = (OffsetBase) / 64; 1054c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov uint64_t EB_Imag = (OffsetBase + Size - 1) / 64; 1055c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (EB_Real != EB_Imag) 1056c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Hi = Lo; 1057c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } else if (Size == 64) { 1058c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // gcc passes <1 x double> in memory. :( 1059c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (VT->getElementType()->isSpecificBuiltinType(BuiltinType::Double)) 1060c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return; 1061c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1062c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // gcc passes <1 x long long> as INTEGER. 1063473f8e723be93d84bd5fd15b094f4184802d4676Chris Lattner if (VT->getElementType()->isSpecificBuiltinType(BuiltinType::LongLong) || 10640fefa4175b0c9101564946f6a975ee9946c16d4bChris Lattner VT->getElementType()->isSpecificBuiltinType(BuiltinType::ULongLong) || 10650fefa4175b0c9101564946f6a975ee9946c16d4bChris Lattner VT->getElementType()->isSpecificBuiltinType(BuiltinType::Long) || 10660fefa4175b0c9101564946f6a975ee9946c16d4bChris Lattner VT->getElementType()->isSpecificBuiltinType(BuiltinType::ULong)) 1067c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Current = Integer; 1068c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov else 1069c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Current = SSE; 1070c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1071c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // If this type crosses an eightbyte boundary, it should be 1072c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // split. 1073c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (OffsetBase && OffsetBase != 64) 1074c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Hi = Lo; 1075c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } else if (Size == 128) { 1076c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Lo = SSE; 1077c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Hi = SSEUp; 1078c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 10791090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner return; 10801090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner } 10818bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 10821090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner if (const ComplexType *CT = Ty->getAs<ComplexType>()) { 1083ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner QualType ET = getContext().getCanonicalType(CT->getElementType()); 1084c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1085ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner uint64_t Size = getContext().getTypeSize(Ty); 10862ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (ET->isIntegralOrEnumerationType()) { 1087c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Size <= 64) 1088c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Current = Integer; 1089c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov else if (Size <= 128) 1090c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Lo = Hi = Integer; 1091ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner } else if (ET == getContext().FloatTy) 1092c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Current = SSE; 1093ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner else if (ET == getContext().DoubleTy) 1094c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Lo = Hi = SSE; 1095ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner else if (ET == getContext().LongDoubleTy) 1096c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Current = ComplexX87; 1097c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1098c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // If this complex type crosses an eightbyte boundary then it 1099c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // should be split. 1100c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov uint64_t EB_Real = (OffsetBase) / 64; 1101ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner uint64_t EB_Imag = (OffsetBase + getContext().getTypeSize(ET)) / 64; 1102c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Hi == NoClass && EB_Real != EB_Imag) 1103c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Hi = Lo; 11048bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 11051090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner return; 11061090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner } 11078bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1108ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner if (const ConstantArrayType *AT = getContext().getAsConstantArrayType(Ty)) { 1109c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Arrays are treated like structures. 1110c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1111ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner uint64_t Size = getContext().getTypeSize(Ty); 1112c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1113c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p2: Rule 1. If the size of an object is larger 1114c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // than two eightbytes, ..., it has class MEMORY. 1115c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Size > 128) 1116c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return; 1117c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1118c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p2: Rule 1. If ..., or it contains unaligned 1119c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // fields, it has class MEMORY. 1120c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 1121c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Only need to check alignment of array base. 1122ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner if (OffsetBase % getContext().getTypeAlign(AT->getElementType())) 1123c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return; 1124c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1125c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Otherwise implement simplified merge. We could be smarter about 1126c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // this, but it isn't worth it and would be harder to verify. 1127c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Current = NoClass; 1128ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner uint64_t EltSize = getContext().getTypeSize(AT->getElementType()); 1129c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov uint64_t ArraySize = AT->getSize().getZExtValue(); 1130c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov for (uint64_t i=0, Offset=OffsetBase; i<ArraySize; ++i, Offset += EltSize) { 1131c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Class FieldLo, FieldHi; 11329c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner classify(AT->getElementType(), Offset, FieldLo, FieldHi); 1133c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Lo = merge(Lo, FieldLo); 1134c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Hi = merge(Hi, FieldHi); 1135c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Lo == Memory || Hi == Memory) 1136c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 1137c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 1138c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1139c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Do post merger cleanup (see below). Only case we worry about is Memory. 1140c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Hi == Memory) 1141c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Lo = Memory; 1142c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov assert((Hi != SSEUp || Lo == SSE) && "Invalid SSEUp array classification."); 11431090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner return; 11441090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner } 11458bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 11461090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner if (const RecordType *RT = Ty->getAs<RecordType>()) { 1147ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner uint64_t Size = getContext().getTypeSize(Ty); 1148c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1149c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p2: Rule 1. If the size of an object is larger 1150c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // than two eightbytes, ..., it has class MEMORY. 1151c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Size > 128) 1152c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return; 1153c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 11540a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson // AMD64-ABI 3.2.3p2: Rule 2. If a C++ object has either a non-trivial 11550a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson // copy constructor or a non-trivial destructor, it is passed by invisible 11560a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson // reference. 11570a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson if (hasNonTrivialDestructorOrCopyConstructor(RT)) 11580a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson return; 1159ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar 1160c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov const RecordDecl *RD = RT->getDecl(); 1161c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1162c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Assume variable sized types are passed in memory. 1163c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (RD->hasFlexibleArrayMember()) 1164c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return; 1165c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1166ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner const ASTRecordLayout &Layout = getContext().getASTRecordLayout(RD); 1167c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1168c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Reset Lo class, this will be recomputed. 1169c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Current = NoClass; 1170ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar 1171ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar // If this is a C++ record, classify the bases first. 1172ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar if (const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(RD)) { 1173ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar for (CXXRecordDecl::base_class_const_iterator i = CXXRD->bases_begin(), 1174ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar e = CXXRD->bases_end(); i != e; ++i) { 1175ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar assert(!i->isVirtual() && !i->getType()->isDependentType() && 1176ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar "Unexpected base class!"); 1177ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar const CXXRecordDecl *Base = 1178ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); 1179ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar 1180ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar // Classify this field. 1181ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar // 1182ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar // AMD64-ABI 3.2.3p2: Rule 3. If the size of the aggregate exceeds a 1183ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar // single eightbyte, each is classified separately. Each eightbyte gets 1184ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar // initialized to class NO_CLASS. 1185ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar Class FieldLo, FieldHi; 1186a14f5979572aa25c03d24750ee4724d2031d4edeAnders Carlsson uint64_t Offset = OffsetBase + Layout.getBaseClassOffsetInBits(Base); 11879c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner classify(i->getType(), Offset, FieldLo, FieldHi); 1188ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar Lo = merge(Lo, FieldLo); 1189ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar Hi = merge(Hi, FieldHi); 1190ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar if (Lo == Memory || Hi == Memory) 1191ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar break; 1192ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar } 1193ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar } 1194ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar 1195ce9f423d2ce4b8699d9f6c7623053f645ac4dc6dDaniel Dunbar // Classify the fields one at a time, merging the results. 1196c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov unsigned idx = 0; 119717945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator i = RD->field_begin(), e = RD->field_end(); 119817945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i != e; ++i, ++idx) { 1199c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov uint64_t Offset = OffsetBase + Layout.getFieldOffset(idx); 1200c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov bool BitField = i->isBitField(); 1201c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1202c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p2: Rule 1. If ..., or it contains unaligned 1203c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // fields, it has class MEMORY. 1204c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 1205c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Note, skip this test for bit-fields, see below. 1206ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner if (!BitField && Offset % getContext().getTypeAlign(i->getType())) { 1207c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Lo = Memory; 1208c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return; 1209c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 1210c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1211c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Classify this field. 1212c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 1213c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p2: Rule 3. If the size of the aggregate 1214c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // exceeds a single eightbyte, each is classified 1215c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // separately. Each eightbyte gets initialized to class 1216c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // NO_CLASS. 1217c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Class FieldLo, FieldHi; 1218c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1219c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Bit-fields require special handling, they do not force the 1220c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // structure to be passed in memory even if unaligned, and 1221c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // therefore they can straddle an eightbyte. 1222c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (BitField) { 1223c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Ignore padding bit-fields. 1224c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (i->isUnnamedBitfield()) 1225c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov continue; 1226c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1227c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov uint64_t Offset = OffsetBase + Layout.getFieldOffset(idx); 1228ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner uint64_t Size = 1229ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner i->getBitWidth()->EvaluateAsInt(getContext()).getZExtValue(); 1230c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1231c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov uint64_t EB_Lo = Offset / 64; 1232c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov uint64_t EB_Hi = (Offset + Size - 1) / 64; 1233c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov FieldLo = FieldHi = NoClass; 1234c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (EB_Lo) { 1235c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov assert(EB_Hi == EB_Lo && "Invalid classification, type > 16 bytes."); 1236c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov FieldLo = NoClass; 1237c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov FieldHi = Integer; 1238c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } else { 1239c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov FieldLo = Integer; 1240c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov FieldHi = EB_Hi ? Integer : NoClass; 1241c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 1242c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } else 12439c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner classify(i->getType(), Offset, FieldLo, FieldHi); 1244c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Lo = merge(Lo, FieldLo); 1245c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Hi = merge(Hi, FieldHi); 1246c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Lo == Memory || Hi == Memory) 1247c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 1248c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 1249c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1250c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p2: Rule 5. Then a post merger cleanup is done: 1251c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 1252c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // (a) If one of the classes is MEMORY, the whole argument is 1253c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // passed in memory. 1254c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 1255c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // (b) If SSEUP is not preceeded by SSE, it is converted to SSE. 1256c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1257c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // The first of these conditions is guaranteed by how we implement 1258c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // the merge (just bail). 1259c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 1260c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // The second condition occurs in the case of unions; for example 1261c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // union { _Complex double; unsigned; }. 1262c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Hi == Memory) 1263c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Lo = Memory; 1264c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Hi == SSEUp && Lo != SSE) 1265c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Hi = SSE; 1266c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 1267c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 1268c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 12699c254f0415bef9a0bafe5b5026ddb54b727597b1Chris LattnerABIArgInfo X86_64ABIInfo::getIndirectReturnResult(QualType Ty) const { 127046c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar // If this is a scalar LLVM value then assume LLVM will pass it in the right 127146c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar // place naturally. 1272d608cdb7c044365cf4e8764ade1e11e99c176078John McCall if (!isAggregateTypeForABI(Ty)) { 127346c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar // Treat an enum type as its underlying type. 127446c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar if (const EnumType *EnumTy = Ty->getAs<EnumType>()) 127546c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar Ty = EnumTy->getDecl()->getIntegerType(); 127646c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar 127746c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar return (Ty->isPromotableIntegerType() ? 127846c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar ABIArgInfo::getExtend() : ABIArgInfo::getDirect()); 127946c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar } 128046c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar 128146c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar return ABIArgInfo::getIndirect(0); 128246c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar} 128346c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar 12849c254f0415bef9a0bafe5b5026ddb54b727597b1Chris LattnerABIArgInfo X86_64ABIInfo::getIndirectResult(QualType Ty) const { 1285c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // If this is a scalar LLVM value then assume LLVM will pass it in the right 1286c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // place naturally. 1287d608cdb7c044365cf4e8764ade1e11e99c176078John McCall if (!isAggregateTypeForABI(Ty)) { 1288aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor // Treat an enum type as its underlying type. 1289aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor if (const EnumType *EnumTy = Ty->getAs<EnumType>()) 1290aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor Ty = EnumTy->getDecl()->getIntegerType(); 1291aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor 1292cc6fa88666ca2f287df4a600eb31a4087bab9c13Anton Korobeynikov return (Ty->isPromotableIntegerType() ? 1293cc6fa88666ca2f287df4a600eb31a4087bab9c13Anton Korobeynikov ABIArgInfo::getExtend() : ABIArgInfo::getDirect()); 1294aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor } 1295c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 129646c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar if (isRecordWithNonTrivialDestructorOrCopyConstructor(Ty)) 129746c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar return ABIArgInfo::getIndirect(0, /*ByVal=*/false); 12980a8f847e97f40cce51dc69051b964732333dc028Anders Carlsson 129946c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar // Compute the byval alignment. We trust the back-end to honor the 130046c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar // minimum ABI alignment for byval, to make cleaner IR. 130146c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar const unsigned MinABIAlign = 8; 1302ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner unsigned Align = getContext().getTypeAlign(Ty) / 8; 130346c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar if (Align > MinABIAlign) 130446c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar return ABIArgInfo::getIndirect(Align); 130546c54fb8ec45765a475b7b709b9aee7f94c490c2Daniel Dunbar return ABIArgInfo::getIndirect(0); 1306c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 1307c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 13080f408f5242522cbede304472e17931357c1b573dChris Lattner/// Get16ByteVectorType - The ABI specifies that a value should be passed in an 13090f408f5242522cbede304472e17931357c1b573dChris Lattner/// full vector XMM register. Pick an LLVM IR type that will be passed as a 13100f408f5242522cbede304472e17931357c1b573dChris Lattner/// vector register. 13110f408f5242522cbede304472e17931357c1b573dChris Lattnerconst llvm::Type *X86_64ABIInfo::Get16ByteVectorType(QualType Ty) const { 131215842bd05bd6d3b7450385ac8f73aaee5f807e19Chris Lattner const llvm::Type *IRType = CGT.ConvertTypeRecursive(Ty); 13138bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 131415842bd05bd6d3b7450385ac8f73aaee5f807e19Chris Lattner // Wrapper structs that just contain vectors are passed just like vectors, 131515842bd05bd6d3b7450385ac8f73aaee5f807e19Chris Lattner // strip them off if present. 131615842bd05bd6d3b7450385ac8f73aaee5f807e19Chris Lattner const llvm::StructType *STy = dyn_cast<llvm::StructType>(IRType); 131715842bd05bd6d3b7450385ac8f73aaee5f807e19Chris Lattner while (STy && STy->getNumElements() == 1) { 131815842bd05bd6d3b7450385ac8f73aaee5f807e19Chris Lattner IRType = STy->getElementType(0); 131915842bd05bd6d3b7450385ac8f73aaee5f807e19Chris Lattner STy = dyn_cast<llvm::StructType>(IRType); 132015842bd05bd6d3b7450385ac8f73aaee5f807e19Chris Lattner } 13218bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 13220f408f5242522cbede304472e17931357c1b573dChris Lattner // If the preferred type is a 16-byte vector, prefer to pass it. 132315842bd05bd6d3b7450385ac8f73aaee5f807e19Chris Lattner if (const llvm::VectorType *VT = dyn_cast<llvm::VectorType>(IRType)){ 13240f408f5242522cbede304472e17931357c1b573dChris Lattner const llvm::Type *EltTy = VT->getElementType(); 13250f408f5242522cbede304472e17931357c1b573dChris Lattner if (VT->getBitWidth() == 128 && 13260f408f5242522cbede304472e17931357c1b573dChris Lattner (EltTy->isFloatTy() || EltTy->isDoubleTy() || 13270f408f5242522cbede304472e17931357c1b573dChris Lattner EltTy->isIntegerTy(8) || EltTy->isIntegerTy(16) || 13280f408f5242522cbede304472e17931357c1b573dChris Lattner EltTy->isIntegerTy(32) || EltTy->isIntegerTy(64) || 13290f408f5242522cbede304472e17931357c1b573dChris Lattner EltTy->isIntegerTy(128))) 13300f408f5242522cbede304472e17931357c1b573dChris Lattner return VT; 13310f408f5242522cbede304472e17931357c1b573dChris Lattner } 13328bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 13330f408f5242522cbede304472e17931357c1b573dChris Lattner return llvm::VectorType::get(llvm::Type::getDoubleTy(getVMContext()), 2); 13340f408f5242522cbede304472e17931357c1b573dChris Lattner} 13350f408f5242522cbede304472e17931357c1b573dChris Lattner 1336e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner/// BitsContainNoUserData - Return true if the specified [start,end) bit range 1337e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner/// is known to either be off the end of the specified type or being in 1338e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner/// alignment padding. The user type specified is known to be at most 128 bits 1339e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner/// in size, and have passed through X86_64ABIInfo::classify with a successful 1340e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner/// classification that put one of the two halves in the INTEGER class. 1341e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner/// 1342e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner/// It is conservatively correct to return false. 1343e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattnerstatic bool BitsContainNoUserData(QualType Ty, unsigned StartBit, 1344e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner unsigned EndBit, ASTContext &Context) { 1345e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // If the bytes being queried are off the end of the type, there is no user 1346e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // data hiding here. This handles analysis of builtins, vectors and other 1347e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // types that don't contain interesting padding. 1348e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner unsigned TySize = (unsigned)Context.getTypeSize(Ty); 1349e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner if (TySize <= StartBit) 1350e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner return true; 1351e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner 1352021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner if (const ConstantArrayType *AT = Context.getAsConstantArrayType(Ty)) { 1353021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner unsigned EltSize = (unsigned)Context.getTypeSize(AT->getElementType()); 1354021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner unsigned NumElts = (unsigned)AT->getSize().getZExtValue(); 1355021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner 1356021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner // Check each element to see if the element overlaps with the queried range. 1357021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner for (unsigned i = 0; i != NumElts; ++i) { 1358021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner // If the element is after the span we care about, then we're done.. 1359021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner unsigned EltOffset = i*EltSize; 1360021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner if (EltOffset >= EndBit) break; 13618bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1362021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner unsigned EltStart = EltOffset < StartBit ? StartBit-EltOffset :0; 1363021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner if (!BitsContainNoUserData(AT->getElementType(), EltStart, 1364021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner EndBit-EltOffset, Context)) 1365021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner return false; 1366021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner } 1367021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner // If it overlaps no elements, then it is safe to process as padding. 1368021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner return true; 1369021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner } 13708bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1371e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner if (const RecordType *RT = Ty->getAs<RecordType>()) { 1372e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner const RecordDecl *RD = RT->getDecl(); 1373e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner const ASTRecordLayout &Layout = Context.getASTRecordLayout(RD); 13748bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1375e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // If this is a C++ record, check the bases first. 1376e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner if (const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(RD)) { 1377e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner for (CXXRecordDecl::base_class_const_iterator i = CXXRD->bases_begin(), 1378e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner e = CXXRD->bases_end(); i != e; ++i) { 1379e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner assert(!i->isVirtual() && !i->getType()->isDependentType() && 1380e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner "Unexpected base class!"); 1381e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner const CXXRecordDecl *Base = 1382e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); 13838bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1384e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // If the base is after the span we care about, ignore it. 1385a14f5979572aa25c03d24750ee4724d2031d4edeAnders Carlsson unsigned BaseOffset = (unsigned)Layout.getBaseClassOffsetInBits(Base); 1386e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner if (BaseOffset >= EndBit) continue; 13878bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1388e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner unsigned BaseStart = BaseOffset < StartBit ? StartBit-BaseOffset :0; 1389e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner if (!BitsContainNoUserData(i->getType(), BaseStart, 1390e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner EndBit-BaseOffset, Context)) 1391e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner return false; 1392e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner } 1393e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner } 13948bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1395e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // Verify that no field has data that overlaps the region of interest. Yes 1396e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // this could be sped up a lot by being smarter about queried fields, 1397e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // however we're only looking at structs up to 16 bytes, so we don't care 1398e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // much. 1399e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner unsigned idx = 0; 1400e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner for (RecordDecl::field_iterator i = RD->field_begin(), e = RD->field_end(); 1401e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner i != e; ++i, ++idx) { 1402e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner unsigned FieldOffset = (unsigned)Layout.getFieldOffset(idx); 14038bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1404e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // If we found a field after the region we care about, then we're done. 1405e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner if (FieldOffset >= EndBit) break; 1406e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner 1407e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner unsigned FieldStart = FieldOffset < StartBit ? StartBit-FieldOffset :0; 1408e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner if (!BitsContainNoUserData(i->getType(), FieldStart, EndBit-FieldOffset, 1409e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner Context)) 1410e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner return false; 1411e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner } 14128bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1413e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // If nothing in this record overlapped the area of interest, then we're 1414e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // clean. 1415e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner return true; 1416e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner } 14178bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1418e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner return false; 1419e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner} 1420e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner 14210b3620066bfbb33004bed1816c851a923b9301afChris Lattner/// ContainsFloatAtOffset - Return true if the specified LLVM IR type has a 14220b3620066bfbb33004bed1816c851a923b9301afChris Lattner/// float member at the specified offset. For example, {int,{float}} has a 14230b3620066bfbb33004bed1816c851a923b9301afChris Lattner/// float at offset 4. It is conservatively correct for this routine to return 14240b3620066bfbb33004bed1816c851a923b9301afChris Lattner/// false. 14250b3620066bfbb33004bed1816c851a923b9301afChris Lattnerstatic bool ContainsFloatAtOffset(const llvm::Type *IRType, unsigned IROffset, 14260b3620066bfbb33004bed1816c851a923b9301afChris Lattner const llvm::TargetData &TD) { 14270b3620066bfbb33004bed1816c851a923b9301afChris Lattner // Base case if we find a float. 14280b3620066bfbb33004bed1816c851a923b9301afChris Lattner if (IROffset == 0 && IRType->isFloatTy()) 14290b3620066bfbb33004bed1816c851a923b9301afChris Lattner return true; 14308bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 14310b3620066bfbb33004bed1816c851a923b9301afChris Lattner // If this is a struct, recurse into the field at the specified offset. 14320b3620066bfbb33004bed1816c851a923b9301afChris Lattner if (const llvm::StructType *STy = dyn_cast<llvm::StructType>(IRType)) { 14330b3620066bfbb33004bed1816c851a923b9301afChris Lattner const llvm::StructLayout *SL = TD.getStructLayout(STy); 14340b3620066bfbb33004bed1816c851a923b9301afChris Lattner unsigned Elt = SL->getElementContainingOffset(IROffset); 14350b3620066bfbb33004bed1816c851a923b9301afChris Lattner IROffset -= SL->getElementOffset(Elt); 14360b3620066bfbb33004bed1816c851a923b9301afChris Lattner return ContainsFloatAtOffset(STy->getElementType(Elt), IROffset, TD); 14370b3620066bfbb33004bed1816c851a923b9301afChris Lattner } 14388bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 14390b3620066bfbb33004bed1816c851a923b9301afChris Lattner // If this is an array, recurse into the field at the specified offset. 14400b3620066bfbb33004bed1816c851a923b9301afChris Lattner if (const llvm::ArrayType *ATy = dyn_cast<llvm::ArrayType>(IRType)) { 14410b3620066bfbb33004bed1816c851a923b9301afChris Lattner const llvm::Type *EltTy = ATy->getElementType(); 14420b3620066bfbb33004bed1816c851a923b9301afChris Lattner unsigned EltSize = TD.getTypeAllocSize(EltTy); 14430b3620066bfbb33004bed1816c851a923b9301afChris Lattner IROffset -= IROffset/EltSize*EltSize; 14440b3620066bfbb33004bed1816c851a923b9301afChris Lattner return ContainsFloatAtOffset(EltTy, IROffset, TD); 14450b3620066bfbb33004bed1816c851a923b9301afChris Lattner } 14460b3620066bfbb33004bed1816c851a923b9301afChris Lattner 14470b3620066bfbb33004bed1816c851a923b9301afChris Lattner return false; 14480b3620066bfbb33004bed1816c851a923b9301afChris Lattner} 14490b3620066bfbb33004bed1816c851a923b9301afChris Lattner 1450f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattner 1451f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattner/// GetSSETypeAtOffset - Return a type that will be passed by the backend in the 1452f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattner/// low 8 bytes of an XMM register, corresponding to the SSE class. 1453f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattnerconst llvm::Type *X86_64ABIInfo:: 1454f47c944b5710a545d564b4d4b641a2f8bac96af3Chris LattnerGetSSETypeAtOffset(const llvm::Type *IRType, unsigned IROffset, 1455f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattner QualType SourceTy, unsigned SourceOffset) const { 1456cba8d310163f84630fd140fbfa9b6fdad9d26587Chris Lattner // The only three choices we have are either double, <2 x float>, or float. We 1457f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattner // pass as float if the last 4 bytes is just padding. This happens for 1458f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattner // structs that contain 3 floats. 1459f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattner if (BitsContainNoUserData(SourceTy, SourceOffset*8+32, 1460f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattner SourceOffset*8+64, getContext())) 1461f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattner return llvm::Type::getFloatTy(getVMContext()); 14628bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 14630b3620066bfbb33004bed1816c851a923b9301afChris Lattner // We want to pass as <2 x float> if the LLVM IR type contains a float at 14640b3620066bfbb33004bed1816c851a923b9301afChris Lattner // offset+0 and offset+4. Walk the LLVM IR type to find out if this is the 14650b3620066bfbb33004bed1816c851a923b9301afChris Lattner // case. 14660b3620066bfbb33004bed1816c851a923b9301afChris Lattner if (ContainsFloatAtOffset(IRType, IROffset, getTargetData()) && 146722fd4baf2eba2103e2b41e463f1a5f6486c398fbChris Lattner ContainsFloatAtOffset(IRType, IROffset+4, getTargetData())) 146822fd4baf2eba2103e2b41e463f1a5f6486c398fbChris Lattner return llvm::VectorType::get(llvm::Type::getFloatTy(getVMContext()), 2); 14698bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1470f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattner return llvm::Type::getDoubleTy(getVMContext()); 1471f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattner} 1472f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattner 1473f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattner 14740d2656d77053cc2ed6f3a3acdf12d67807c7f3a2Chris Lattner/// GetINTEGERTypeAtOffset - The ABI specifies that a value should be passed in 14750d2656d77053cc2ed6f3a3acdf12d67807c7f3a2Chris Lattner/// an 8-byte GPR. This means that we either have a scalar or we are talking 14760d2656d77053cc2ed6f3a3acdf12d67807c7f3a2Chris Lattner/// about the high or low part of an up-to-16-byte struct. This routine picks 14770d2656d77053cc2ed6f3a3acdf12d67807c7f3a2Chris Lattner/// the best LLVM IR type to represent this, which may be i64 or may be anything 1478519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner/// else that the backend will pass in a GPR that works better (e.g. i8, %foo*, 1479519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner/// etc). 1480519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner/// 1481519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner/// PrefType is an LLVM IR type that corresponds to (part of) the IR type for 1482519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner/// the source type. IROffset is an offset in bytes into the LLVM IR type that 1483519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner/// the 8-byte value references. PrefType may be null. 1484519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner/// 1485519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner/// SourceTy is the source level type for the entire argument. SourceOffset is 1486519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner/// an offset into this that we're processing (which is always either 0 or 8). 1487519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner/// 148844f0fd2804e9952a8dbf85bb60ee3501aa9f5ee7Chris Lattnerconst llvm::Type *X86_64ABIInfo:: 14890d2656d77053cc2ed6f3a3acdf12d67807c7f3a2Chris LattnerGetINTEGERTypeAtOffset(const llvm::Type *IRType, unsigned IROffset, 14900d2656d77053cc2ed6f3a3acdf12d67807c7f3a2Chris Lattner QualType SourceTy, unsigned SourceOffset) const { 1491e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // If we're dealing with an un-offset LLVM IR type, then it means that we're 1492e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // returning an 8-byte unit starting with it. See if we can safely use it. 1493e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner if (IROffset == 0) { 1494e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // Pointers and int64's always fill the 8-byte unit. 1495e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner if (isa<llvm::PointerType>(IRType) || IRType->isIntegerTy(64)) 1496e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner return IRType; 1497e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner 1498e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // If we have a 1/2/4-byte integer, we can use it only if the rest of the 1499e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // goodness in the source type is just tail padding. This is allowed to 1500e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // kick in for struct {double,int} on the int, but not on 1501e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // struct{double,int,int} because we wouldn't return the second int. We 1502e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // have to do this analysis on the source type because we can't depend on 1503e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner // unions being lowered a specific way etc. 1504e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner if (IRType->isIntegerTy(8) || IRType->isIntegerTy(16) || 1505e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner IRType->isIntegerTy(32)) { 1506e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner unsigned BitWidth = cast<llvm::IntegerType>(IRType)->getBitWidth(); 15078bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1508e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner if (BitsContainNoUserData(SourceTy, SourceOffset*8+BitWidth, 1509e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner SourceOffset*8+64, getContext())) 1510e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner return IRType; 1511e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner } 1512e2962be11e8894329d37985eccaa4f4a12dea402Chris Lattner } 1513519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner 1514fe12d1ee8be8b8023c0c60b299ae957ea0df5d21Chris Lattner if (const llvm::StructType *STy = dyn_cast<llvm::StructType>(IRType)) { 1515519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner // If this is a struct, recurse into the field at the specified offset. 151644f0fd2804e9952a8dbf85bb60ee3501aa9f5ee7Chris Lattner const llvm::StructLayout *SL = getTargetData().getStructLayout(STy); 1517519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner if (IROffset < SL->getSizeInBytes()) { 1518519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner unsigned FieldIdx = SL->getElementContainingOffset(IROffset); 1519519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner IROffset -= SL->getElementOffset(FieldIdx); 15208bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 15210d2656d77053cc2ed6f3a3acdf12d67807c7f3a2Chris Lattner return GetINTEGERTypeAtOffset(STy->getElementType(FieldIdx), IROffset, 15220d2656d77053cc2ed6f3a3acdf12d67807c7f3a2Chris Lattner SourceTy, SourceOffset); 15238bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer } 1524519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner } 15258bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1526021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner if (const llvm::ArrayType *ATy = dyn_cast<llvm::ArrayType>(IRType)) { 1527021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner const llvm::Type *EltTy = ATy->getElementType(); 1528021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner unsigned EltSize = getTargetData().getTypeAllocSize(EltTy); 1529021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner unsigned EltOffset = IROffset/EltSize*EltSize; 15300d2656d77053cc2ed6f3a3acdf12d67807c7f3a2Chris Lattner return GetINTEGERTypeAtOffset(EltTy, IROffset-EltOffset, SourceTy, 15310d2656d77053cc2ed6f3a3acdf12d67807c7f3a2Chris Lattner SourceOffset); 1532021c3a349d4f55cc2c7970268758bcf37b924493Chris Lattner } 15338bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1534519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner // Okay, we don't have any better idea of what to pass, so we pass this in an 1535519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner // integer register that isn't too big to fit the rest of the struct. 15369e45a3de3f462785a86bba77dee168ab354d9704Chris Lattner unsigned TySizeInBytes = 15379e45a3de3f462785a86bba77dee168ab354d9704Chris Lattner (unsigned)getContext().getTypeSizeInChars(SourceTy).getQuantity(); 1538519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner 15399e45a3de3f462785a86bba77dee168ab354d9704Chris Lattner assert(TySizeInBytes != SourceOffset && "Empty field?"); 15408bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1541519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner // It is always safe to classify this as an integer type up to i64 that 1542519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner // isn't larger than the structure. 15439e45a3de3f462785a86bba77dee168ab354d9704Chris Lattner return llvm::IntegerType::get(getVMContext(), 15449e45a3de3f462785a86bba77dee168ab354d9704Chris Lattner std::min(TySizeInBytes-SourceOffset, 8U)*8); 1545519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner} 1546519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner 154766e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner 154866e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner/// GetX86_64ByValArgumentPair - Given a high and low type that can ideally 154966e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner/// be used as elements of a two register pair to pass or return, return a 155066e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner/// first class aggregate to represent them. For example, if the low part of 155166e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner/// a by-value argument should be passed as i32* and the high part as float, 155266e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner/// return {i32*, float}. 155366e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattnerstatic const llvm::Type * 155466e7b68b0016aeebe349e21ace93ff0178665d69Chris LattnerGetX86_64ByValArgumentPair(const llvm::Type *Lo, const llvm::Type *Hi, 155566e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner const llvm::TargetData &TD) { 155666e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner // In order to correctly satisfy the ABI, we need to the high part to start 155766e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner // at offset 8. If the high and low parts we inferred are both 4-byte types 155866e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner // (e.g. i32 and i32) then the resultant struct type ({i32,i32}) won't have 155966e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner // the second element at offset 8. Check for this: 156066e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner unsigned LoSize = (unsigned)TD.getTypeAllocSize(Lo); 156166e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner unsigned HiAlign = TD.getABITypeAlignment(Hi); 156266e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner unsigned HiStart = llvm::TargetData::RoundUpAlignment(LoSize, HiAlign); 156366e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner assert(HiStart != 0 && HiStart <= 8 && "Invalid x86-64 argument pair!"); 15649cac4942b920d4c5514e71949e3062ed626bfbdfMichael J. Spencer 156566e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner // To handle this, we have to increase the size of the low part so that the 156666e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner // second element will start at an 8 byte offset. We can't increase the size 156766e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner // of the second element because it might make us access off the end of the 156866e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner // struct. 156966e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner if (HiStart != 8) { 157066e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner // There are only two sorts of types the ABI generation code can produce for 157166e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner // the low part of a pair that aren't 8 bytes in size: float or i8/i16/i32. 157266e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner // Promote these to a larger type. 157366e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner if (Lo->isFloatTy()) 157466e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner Lo = llvm::Type::getDoubleTy(Lo->getContext()); 157566e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner else { 157666e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner assert(Lo->isIntegerTy() && "Invalid/unknown lo type"); 157766e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner Lo = llvm::Type::getInt64Ty(Lo->getContext()); 157866e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner } 157966e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner } 15809cac4942b920d4c5514e71949e3062ed626bfbdfMichael J. Spencer 15819cac4942b920d4c5514e71949e3062ed626bfbdfMichael J. Spencer const llvm::StructType *Result = 158266e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner llvm::StructType::get(Lo->getContext(), Lo, Hi, NULL); 15839cac4942b920d4c5514e71949e3062ed626bfbdfMichael J. Spencer 15849cac4942b920d4c5514e71949e3062ed626bfbdfMichael J. Spencer 158566e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner // Verify that the second element is at an 8-byte offset. 158666e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner assert(TD.getStructLayout(Result)->getElementOffset(1) == 8 && 158766e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner "Invalid x86-64 argument pair!"); 158866e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner return Result; 158966e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner} 159066e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner 15911090a9ba0902380dbd97d0a500daa4c373712df9Chris LattnerABIArgInfo X86_64ABIInfo:: 1592a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris LattnerclassifyReturnType(QualType RetTy) const { 1593c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p4: Rule 1. Classify the return type with the 1594c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // classification algorithm. 1595c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov X86_64ABIInfo::Class Lo, Hi; 15969c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner classify(RetTy, 0, Lo, Hi); 1597c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1598c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Check some invariants. 1599c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov assert((Hi != Memory || Lo == Memory) && "Invalid memory classification."); 1600c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov assert((Hi != SSEUp || Lo == SSE) && "Invalid SSEUp classification."); 1601c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1602c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov const llvm::Type *ResType = 0; 1603c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov switch (Lo) { 1604c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case NoClass: 1605117e3f4cd4d6ea41c3202da8729f94168c5c8239Chris Lattner if (Hi == NoClass) 1606117e3f4cd4d6ea41c3202da8729f94168c5c8239Chris Lattner return ABIArgInfo::getIgnore(); 1607117e3f4cd4d6ea41c3202da8729f94168c5c8239Chris Lattner // If the low part is just padding, it takes no register, leave ResType 1608117e3f4cd4d6ea41c3202da8729f94168c5c8239Chris Lattner // null. 1609117e3f4cd4d6ea41c3202da8729f94168c5c8239Chris Lattner assert((Hi == SSE || Hi == Integer || Hi == X87Up) && 1610117e3f4cd4d6ea41c3202da8729f94168c5c8239Chris Lattner "Unknown missing lo part"); 1611117e3f4cd4d6ea41c3202da8729f94168c5c8239Chris Lattner break; 1612c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1613c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case SSEUp: 1614c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case X87Up: 1615c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov assert(0 && "Invalid classification for lo word."); 1616c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1617c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p4: Rule 2. Types of class memory are returned via 1618c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // hidden argument. 1619c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case Memory: 16209c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner return getIndirectReturnResult(RetTy); 1621c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1622c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p4: Rule 3. If the class is INTEGER, the next 1623c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // available register of the sequence %rax, %rdx is used. 1624c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case Integer: 16250d2656d77053cc2ed6f3a3acdf12d67807c7f3a2Chris Lattner ResType = GetINTEGERTypeAtOffset(CGT.ConvertTypeRecursive(RetTy), 0, 16260d2656d77053cc2ed6f3a3acdf12d67807c7f3a2Chris Lattner RetTy, 0); 16278bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1628eb518b4b89e4134b21975530809697142f69b779Chris Lattner // If we have a sign or zero extended integer, make sure to return Extend 1629eb518b4b89e4134b21975530809697142f69b779Chris Lattner // so that the parameter gets the right LLVM IR attributes. 1630eb518b4b89e4134b21975530809697142f69b779Chris Lattner if (Hi == NoClass && isa<llvm::IntegerType>(ResType)) { 1631eb518b4b89e4134b21975530809697142f69b779Chris Lattner // Treat an enum type as its underlying type. 1632eb518b4b89e4134b21975530809697142f69b779Chris Lattner if (const EnumType *EnumTy = RetTy->getAs<EnumType>()) 1633eb518b4b89e4134b21975530809697142f69b779Chris Lattner RetTy = EnumTy->getDecl()->getIntegerType(); 16348bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1635eb518b4b89e4134b21975530809697142f69b779Chris Lattner if (RetTy->isIntegralOrEnumerationType() && 1636eb518b4b89e4134b21975530809697142f69b779Chris Lattner RetTy->isPromotableIntegerType()) 1637eb518b4b89e4134b21975530809697142f69b779Chris Lattner return ABIArgInfo::getExtend(); 1638eb518b4b89e4134b21975530809697142f69b779Chris Lattner } 1639519f68cd26777c755763a644a7f7ed7ac389beb9Chris Lattner break; 1640c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1641c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p4: Rule 4. If the class is SSE, the next 1642c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // available SSE register of the sequence %xmm0, %xmm1 is used. 1643c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case SSE: 1644f47c944b5710a545d564b4d4b641a2f8bac96af3Chris Lattner ResType = GetSSETypeAtOffset(CGT.ConvertTypeRecursive(RetTy), 0, RetTy, 0); 16450b30c67132f00c667512a65cfe1fe81ae54c2383Chris Lattner break; 1646c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1647c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p4: Rule 6. If the class is X87, the value is 1648c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // returned on the X87 stack in %st0 as 80-bit x87 number. 1649c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case X87: 1650ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner ResType = llvm::Type::getX86_FP80Ty(getVMContext()); 16510b30c67132f00c667512a65cfe1fe81ae54c2383Chris Lattner break; 1652c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1653c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p4: Rule 8. If the class is COMPLEX_X87, the real 1654c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // part of the value is returned in %st0 and the imaginary part in 1655c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // %st1. 1656c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case ComplexX87: 1657c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov assert(Hi == ComplexX87 && "Unexpected ComplexX87 classification."); 1658a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ResType = llvm::StructType::get(getVMContext(), 1659ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner llvm::Type::getX86_FP80Ty(getVMContext()), 1660ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner llvm::Type::getX86_FP80Ty(getVMContext()), 1661c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov NULL); 1662c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 1663c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 1664c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 16653db4dde12de84269c8f803f9dfca37a2d14f9898Chris Lattner const llvm::Type *HighPart = 0; 1666c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov switch (Hi) { 1667c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Memory was handled previously and X87 should 1668c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // never occur as a hi class. 1669c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case Memory: 1670c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case X87: 1671c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov assert(0 && "Invalid classification for hi word."); 1672c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1673c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case ComplexX87: // Previously handled. 16740b30c67132f00c667512a65cfe1fe81ae54c2383Chris Lattner case NoClass: 16750b30c67132f00c667512a65cfe1fe81ae54c2383Chris Lattner break; 1676c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 16773db4dde12de84269c8f803f9dfca37a2d14f9898Chris Lattner case Integer: 16783db4dde12de84269c8f803f9dfca37a2d14f9898Chris Lattner HighPart = GetINTEGERTypeAtOffset(CGT.ConvertTypeRecursive(RetTy), 16793db4dde12de84269c8f803f9dfca37a2d14f9898Chris Lattner 8, RetTy, 8); 16803db4dde12de84269c8f803f9dfca37a2d14f9898Chris Lattner if (Lo == NoClass) // Return HighPart at offset 8 in memory. 16813db4dde12de84269c8f803f9dfca37a2d14f9898Chris Lattner return ABIArgInfo::getDirect(HighPart, 8); 1682c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 16833db4dde12de84269c8f803f9dfca37a2d14f9898Chris Lattner case SSE: 16843db4dde12de84269c8f803f9dfca37a2d14f9898Chris Lattner HighPart = GetSSETypeAtOffset(CGT.ConvertTypeRecursive(RetTy), 8, RetTy, 8); 16853db4dde12de84269c8f803f9dfca37a2d14f9898Chris Lattner if (Lo == NoClass) // Return HighPart at offset 8 in memory. 16863db4dde12de84269c8f803f9dfca37a2d14f9898Chris Lattner return ABIArgInfo::getDirect(HighPart, 8); 1687c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 1688c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1689c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p4: Rule 5. If the class is SSEUP, the eightbyte 1690c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // is passed in the upper half of the last used SSE register. 1691c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 1692c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // SSEUP should always be preceeded by SSE, just widen. 1693c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case SSEUp: 1694c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov assert(Lo == SSE && "Unexpected SSEUp classification."); 16950f408f5242522cbede304472e17931357c1b573dChris Lattner ResType = Get16ByteVectorType(RetTy); 1696c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 1697c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1698c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p4: Rule 7. If the class is X87UP, the value is 1699c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // returned together with the previous X87 value in %st0. 1700c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case X87Up: 1701c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // If X87Up is preceeded by X87, we don't need to do 1702c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // anything. However, in some cases with unions it may not be 1703c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // preceeded by X87. In such situations we follow gcc and pass the 1704c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // extra bits in an SSE reg. 1705603519d269d48dca99927f0ad65e92099bd76161Chris Lattner if (Lo != X87) { 17063db4dde12de84269c8f803f9dfca37a2d14f9898Chris Lattner HighPart = GetSSETypeAtOffset(CGT.ConvertTypeRecursive(RetTy), 17073db4dde12de84269c8f803f9dfca37a2d14f9898Chris Lattner 8, RetTy, 8); 17083db4dde12de84269c8f803f9dfca37a2d14f9898Chris Lattner if (Lo == NoClass) // Return HighPart at offset 8 in memory. 17093db4dde12de84269c8f803f9dfca37a2d14f9898Chris Lattner return ABIArgInfo::getDirect(HighPart, 8); 1710603519d269d48dca99927f0ad65e92099bd76161Chris Lattner } 1711c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 1712c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 17139cac4942b920d4c5514e71949e3062ed626bfbdfMichael J. Spencer 17143db4dde12de84269c8f803f9dfca37a2d14f9898Chris Lattner // If a high part was specified, merge it together with the low part. It is 1715645406a3d3405ad0f4b5a0e46a34ae92d9d23bd3Chris Lattner // known to pass in the high eightbyte of the result. We do this by forming a 1716645406a3d3405ad0f4b5a0e46a34ae92d9d23bd3Chris Lattner // first class struct aggregate with the high and low part: {low, high} 171766e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner if (HighPart) 171866e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner ResType = GetX86_64ByValArgumentPair(ResType, HighPart, getTargetData()); 1719c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1720eb518b4b89e4134b21975530809697142f69b779Chris Lattner return ABIArgInfo::getDirect(ResType); 17219c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner} 17229c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner 1723a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris LattnerABIArgInfo X86_64ABIInfo::classifyArgumentType(QualType Ty, unsigned &neededInt, 172499aaae87ae972ac2dd4cccd8b4886537aabaff43Bill Wendling unsigned &neededSSE) const { 1725c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov X86_64ABIInfo::Class Lo, Hi; 17269c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner classify(Ty, 0, Lo, Hi); 17278bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1728c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Check some invariants. 1729c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // FIXME: Enforce these by construction. 1730c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov assert((Hi != Memory || Lo == Memory) && "Invalid memory classification."); 1731c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov assert((Hi != SSEUp || Lo == SSE) && "Invalid SSEUp classification."); 1732c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1733c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov neededInt = 0; 1734c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov neededSSE = 0; 1735c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov const llvm::Type *ResType = 0; 1736c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov switch (Lo) { 1737c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case NoClass: 1738117e3f4cd4d6ea41c3202da8729f94168c5c8239Chris Lattner if (Hi == NoClass) 1739117e3f4cd4d6ea41c3202da8729f94168c5c8239Chris Lattner return ABIArgInfo::getIgnore(); 1740117e3f4cd4d6ea41c3202da8729f94168c5c8239Chris Lattner // If the low part is just padding, it takes no register, leave ResType 1741117e3f4cd4d6ea41c3202da8729f94168c5c8239Chris Lattner // null. 1742117e3f4cd4d6ea41c3202da8729f94168c5c8239Chris Lattner assert((Hi == SSE || Hi == Integer || Hi == X87Up) && 1743117e3f4cd4d6ea41c3202da8729f94168c5c8239Chris Lattner "Unknown missing lo part"); 1744117e3f4cd4d6ea41c3202da8729f94168c5c8239Chris Lattner break; 17458bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1746c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p3: Rule 1. If the class is MEMORY, pass the argument 1747c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // on the stack. 1748c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case Memory: 1749c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1750c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p3: Rule 5. If the class is X87, X87UP or 1751c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // COMPLEX_X87, it is passed in memory. 1752c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case X87: 1753c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case ComplexX87: 17549c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner return getIndirectResult(Ty); 1755c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1756c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case SSEUp: 1757c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case X87Up: 1758c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov assert(0 && "Invalid classification for lo word."); 1759c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1760c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p3: Rule 2. If the class is INTEGER, the next 1761c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // available register of the sequence %rdi, %rsi, %rdx, %rcx, %r8 1762c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // and %r9 is used. 1763c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case Integer: 17649c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner ++neededInt; 17658bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 176649382de42c2a411bfd772408e987cb399071241dChris Lattner // Pick an 8-byte type based on the preferred type. 17670d2656d77053cc2ed6f3a3acdf12d67807c7f3a2Chris Lattner ResType = GetINTEGERTypeAtOffset(CGT.ConvertTypeRecursive(Ty), 0, Ty, 0); 1768eb518b4b89e4134b21975530809697142f69b779Chris Lattner 1769eb518b4b89e4134b21975530809697142f69b779Chris Lattner // If we have a sign or zero extended integer, make sure to return Extend 1770eb518b4b89e4134b21975530809697142f69b779Chris Lattner // so that the parameter gets the right LLVM IR attributes. 1771eb518b4b89e4134b21975530809697142f69b779Chris Lattner if (Hi == NoClass && isa<llvm::IntegerType>(ResType)) { 1772eb518b4b89e4134b21975530809697142f69b779Chris Lattner // Treat an enum type as its underlying type. 1773eb518b4b89e4134b21975530809697142f69b779Chris Lattner if (const EnumType *EnumTy = Ty->getAs<EnumType>()) 1774eb518b4b89e4134b21975530809697142f69b779Chris Lattner Ty = EnumTy->getDecl()->getIntegerType(); 17758bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1776eb518b4b89e4134b21975530809697142f69b779Chris Lattner if (Ty->isIntegralOrEnumerationType() && 1777eb518b4b89e4134b21975530809697142f69b779Chris Lattner Ty->isPromotableIntegerType()) 1778eb518b4b89e4134b21975530809697142f69b779Chris Lattner return ABIArgInfo::getExtend(); 1779eb518b4b89e4134b21975530809697142f69b779Chris Lattner } 17808bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1781c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 1782c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1783c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p3: Rule 3. If the class is SSE, the next 1784c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // available SSE register is used, the registers are taken in the 1785c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // order from %xmm0 to %xmm7. 1786bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling case SSE: { 1787bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling const llvm::Type *IRType = CGT.ConvertTypeRecursive(Ty); 178899aaae87ae972ac2dd4cccd8b4886537aabaff43Bill Wendling if (Hi != NoClass || !UseX86_MMXType(IRType)) 1789bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling ResType = GetSSETypeAtOffset(IRType, 0, Ty, 0); 179099aaae87ae972ac2dd4cccd8b4886537aabaff43Bill Wendling else 1791bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling // This is an MMX type. Treat it as such. 1792bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling ResType = llvm::Type::getX86_MMXTy(getVMContext()); 1793bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling 179499aaae87ae972ac2dd4cccd8b4886537aabaff43Bill Wendling ++neededSSE; 1795c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 1796c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 1797bb465d7d0489a6605bb1eb82dea87350066ac5e2Bill Wendling } 1798c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1799645406a3d3405ad0f4b5a0e46a34ae92d9d23bd3Chris Lattner const llvm::Type *HighPart = 0; 1800c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov switch (Hi) { 1801c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Memory was handled previously, ComplexX87 and X87 should 1802c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // never occur as hi classes, and X87Up must be preceed by X87, 1803c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // which is passed in memory. 1804c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case Memory: 1805c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case X87: 1806c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case ComplexX87: 1807c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov assert(0 && "Invalid classification for hi word."); 1808c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 1809c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1810c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case NoClass: break; 18118bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1812645406a3d3405ad0f4b5a0e46a34ae92d9d23bd3Chris Lattner case Integer: 1813c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov ++neededInt; 181449382de42c2a411bfd772408e987cb399071241dChris Lattner // Pick an 8-byte type based on the preferred type. 1815645406a3d3405ad0f4b5a0e46a34ae92d9d23bd3Chris Lattner HighPart = GetINTEGERTypeAtOffset(CGT.ConvertTypeRecursive(Ty), 8, Ty, 8); 1816117e3f4cd4d6ea41c3202da8729f94168c5c8239Chris Lattner 1817645406a3d3405ad0f4b5a0e46a34ae92d9d23bd3Chris Lattner if (Lo == NoClass) // Pass HighPart at offset 8 in memory. 1818645406a3d3405ad0f4b5a0e46a34ae92d9d23bd3Chris Lattner return ABIArgInfo::getDirect(HighPart, 8); 1819c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 1820c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1821c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // X87Up generally doesn't occur here (long double is passed in 1822c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // memory), except in situations involving unions. 1823c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case X87Up: 1824645406a3d3405ad0f4b5a0e46a34ae92d9d23bd3Chris Lattner case SSE: 1825645406a3d3405ad0f4b5a0e46a34ae92d9d23bd3Chris Lattner HighPart = GetSSETypeAtOffset(CGT.ConvertTypeRecursive(Ty), 8, Ty, 8); 18268bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1827645406a3d3405ad0f4b5a0e46a34ae92d9d23bd3Chris Lattner if (Lo == NoClass) // Pass HighPart at offset 8 in memory. 1828645406a3d3405ad0f4b5a0e46a34ae92d9d23bd3Chris Lattner return ABIArgInfo::getDirect(HighPart, 8); 1829117e3f4cd4d6ea41c3202da8729f94168c5c8239Chris Lattner 1830c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov ++neededSSE; 1831c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 1832c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1833c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p3: Rule 4. If the class is SSEUP, the 1834c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // eightbyte is passed in the upper half of the last used SSE 18358bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer // register. This only happens when 128-bit vectors are passed. 1836c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov case SSEUp: 1837ab5722e67794b3954c874a369086fc5f41ac46a5Chris Lattner assert(Lo == SSE && "Unexpected SSEUp classification"); 18380f408f5242522cbede304472e17931357c1b573dChris Lattner ResType = Get16ByteVectorType(Ty); 1839c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov break; 1840c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 1841c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1842645406a3d3405ad0f4b5a0e46a34ae92d9d23bd3Chris Lattner // If a high part was specified, merge it together with the low part. It is 1843645406a3d3405ad0f4b5a0e46a34ae92d9d23bd3Chris Lattner // known to pass in the high eightbyte of the result. We do this by forming a 1844645406a3d3405ad0f4b5a0e46a34ae92d9d23bd3Chris Lattner // first class struct aggregate with the high and low part: {low, high} 1845645406a3d3405ad0f4b5a0e46a34ae92d9d23bd3Chris Lattner if (HighPart) 184666e7b68b0016aeebe349e21ace93ff0178665d69Chris Lattner ResType = GetX86_64ByValArgumentPair(ResType, HighPart, getTargetData()); 18479cac4942b920d4c5514e71949e3062ed626bfbdfMichael J. Spencer 1848eb518b4b89e4134b21975530809697142f69b779Chris Lattner return ABIArgInfo::getDirect(ResType); 1849c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 1850c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1851ee5dcd064a811edc90f6c1fb31a837b6c961fed7Chris Lattnervoid X86_64ABIInfo::computeInfo(CGFunctionInfo &FI) const { 18528bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1853a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner FI.getReturnInfo() = classifyReturnType(FI.getReturnType()); 1854c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1855c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Keep track of the number of assigned registers. 185699aaae87ae972ac2dd4cccd8b4886537aabaff43Bill Wendling unsigned freeIntRegs = 6, freeSSERegs = 8; 1857c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1858c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // If the return value is indirect, then the hidden argument is consuming one 1859c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // integer register. 1860c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (FI.getReturnInfo().isIndirect()) 1861c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov --freeIntRegs; 1862c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1863c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p3: Once arguments are classified, the registers 1864c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // get assigned (in left-to-right order) for passing as follows... 1865c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov for (CGFunctionInfo::arg_iterator it = FI.arg_begin(), ie = FI.arg_end(); 1866c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov it != ie; ++it) { 186799aaae87ae972ac2dd4cccd8b4886537aabaff43Bill Wendling unsigned neededInt, neededSSE; 186899aaae87ae972ac2dd4cccd8b4886537aabaff43Bill Wendling it->info = classifyArgumentType(it->type, neededInt, neededSSE); 1869c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1870c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.2.3p3: If there are no registers available for any 1871c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // eightbyte of an argument, the whole argument is passed on the 1872c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // stack. If registers have already been assigned for some 1873c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // eightbytes of such an argument, the assignments get reverted. 187499aaae87ae972ac2dd4cccd8b4886537aabaff43Bill Wendling if (freeIntRegs >= neededInt && freeSSERegs >= neededSSE) { 1875c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov freeIntRegs -= neededInt; 1876c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov freeSSERegs -= neededSSE; 1877c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } else { 18789c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner it->info = getIndirectResult(it->type); 1879c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 1880c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 1881c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 1882c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1883c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovstatic llvm::Value *EmitVAArgFromMemory(llvm::Value *VAListAddr, 1884c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov QualType Ty, 1885c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CodeGenFunction &CGF) { 1886c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *overflow_arg_area_p = 1887c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGF.Builder.CreateStructGEP(VAListAddr, 2, "overflow_arg_area_p"); 1888c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *overflow_arg_area = 1889c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGF.Builder.CreateLoad(overflow_arg_area_p, "overflow_arg_area"); 1890c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1891c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.5.7p5: Step 7. Align l->overflow_arg_area upwards to a 16 1892c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // byte boundary if alignment needed by type exceeds 8 byte boundary. 1893c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov uint64_t Align = CGF.getContext().getTypeAlign(Ty) / 8; 1894c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (Align > 8) { 1895c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Note that we follow the ABI & gcc here, even though the type 1896c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // could in theory have an alignment greater than 16. This case 1897c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // shouldn't ever matter in practice. 1898c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1899c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // overflow_arg_area = (overflow_arg_area + 15) & ~15; 19000032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Value *Offset = 190177b89b87c3b9220fea1bc80f6d6598d2003cc8a8Chris Lattner llvm::ConstantInt::get(CGF.Int32Ty, 15); 1902c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov overflow_arg_area = CGF.Builder.CreateGEP(overflow_arg_area, Offset); 1903c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *AsInt = CGF.Builder.CreatePtrToInt(overflow_arg_area, 190477b89b87c3b9220fea1bc80f6d6598d2003cc8a8Chris Lattner CGF.Int64Ty); 190577b89b87c3b9220fea1bc80f6d6598d2003cc8a8Chris Lattner llvm::Value *Mask = llvm::ConstantInt::get(CGF.Int64Ty, ~15LL); 1906c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov overflow_arg_area = 1907c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGF.Builder.CreateIntToPtr(CGF.Builder.CreateAnd(AsInt, Mask), 1908c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov overflow_arg_area->getType(), 1909c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov "overflow_arg_area.align"); 1910c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 1911c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1912c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.5.7p5: Step 8. Fetch type from l->overflow_arg_area. 1913c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov const llvm::Type *LTy = CGF.ConvertTypeForMem(Ty); 1914c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *Res = 1915c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGF.Builder.CreateBitCast(overflow_arg_area, 191696e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(LTy)); 1917c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1918c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.5.7p5: Step 9. Set l->overflow_arg_area to: 1919c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // l->overflow_arg_area + sizeof(type). 1920c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.5.7p5: Step 10. Align l->overflow_arg_area upwards to 1921c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // an 8 byte boundary. 1922c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1923c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov uint64_t SizeInBytes = (CGF.getContext().getTypeSize(Ty) + 7) / 8; 19240032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Value *Offset = 192577b89b87c3b9220fea1bc80f6d6598d2003cc8a8Chris Lattner llvm::ConstantInt::get(CGF.Int32Ty, (SizeInBytes + 7) & ~7); 1926c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov overflow_arg_area = CGF.Builder.CreateGEP(overflow_arg_area, Offset, 1927c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov "overflow_arg_area.next"); 1928c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGF.Builder.CreateStore(overflow_arg_area, overflow_arg_area_p); 1929c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1930c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.5.7p5: Step 11. Return the fetched type. 1931c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return Res; 1932c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 1933c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1934c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovllvm::Value *X86_64ABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 1935c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CodeGenFunction &CGF) const { 1936a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson llvm::LLVMContext &VMContext = CGF.getLLVMContext(); 19371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1938c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Assume that va_list type is correct; should be pointer to LLVM type: 1939c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // struct { 1940c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // i32 gp_offset; 1941c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // i32 fp_offset; 1942c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // i8* overflow_arg_area; 1943c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // i8* reg_save_area; 1944c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // }; 194599aaae87ae972ac2dd4cccd8b4886537aabaff43Bill Wendling unsigned neededInt, neededSSE; 19468bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 1947a14db75641f377ef8b033c67653cd95ac4c36fe3Chris Lattner Ty = CGF.getContext().getCanonicalType(Ty); 194899aaae87ae972ac2dd4cccd8b4886537aabaff43Bill Wendling ABIArgInfo AI = classifyArgumentType(Ty, neededInt, neededSSE); 1949c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1950c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.5.7p5: Step 1. Determine whether type may be passed 1951c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // in the registers. If not go to step 7. 1952c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (!neededInt && !neededSSE) 1953c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return EmitVAArgFromMemory(VAListAddr, Ty, CGF); 1954c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1955c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.5.7p5: Step 2. Compute num_gp to hold the number of 1956c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // general purpose registers needed to pass type and num_fp to hold 1957c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // the number of floating point registers needed. 1958c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1959c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.5.7p5: Step 3. Verify whether arguments fit into 1960c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // registers. In the case: l->gp_offset > 48 - num_gp * 8 or 1961c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // l->fp_offset > 304 - num_fp * 16 go to step 7. 1962c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 1963c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // NOTE: 304 is a typo, there are (6 * 8 + 8 * 16) = 176 bytes of 1964c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // register save space). 1965c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1966c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *InRegs = 0; 1967c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *gp_offset_p = 0, *gp_offset = 0; 1968c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *fp_offset_p = 0, *fp_offset = 0; 1969c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (neededInt) { 1970c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov gp_offset_p = CGF.Builder.CreateStructGEP(VAListAddr, 0, "gp_offset_p"); 1971c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov gp_offset = CGF.Builder.CreateLoad(gp_offset_p, "gp_offset"); 19721090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner InRegs = llvm::ConstantInt::get(CGF.Int32Ty, 48 - neededInt * 8); 19731090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner InRegs = CGF.Builder.CreateICmpULE(gp_offset, InRegs, "fits_in_gp"); 1974c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 1975c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1976c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (neededSSE) { 1977c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov fp_offset_p = CGF.Builder.CreateStructGEP(VAListAddr, 1, "fp_offset_p"); 1978c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov fp_offset = CGF.Builder.CreateLoad(fp_offset_p, "fp_offset"); 1979c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *FitsInFP = 19801090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner llvm::ConstantInt::get(CGF.Int32Ty, 176 - neededSSE * 16); 19811090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner FitsInFP = CGF.Builder.CreateICmpULE(fp_offset, FitsInFP, "fits_in_fp"); 1982c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov InRegs = InRegs ? CGF.Builder.CreateAnd(InRegs, FitsInFP) : FitsInFP; 1983c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 1984c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1985c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::BasicBlock *InRegBlock = CGF.createBasicBlock("vaarg.in_reg"); 1986c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::BasicBlock *InMemBlock = CGF.createBasicBlock("vaarg.in_mem"); 1987c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::BasicBlock *ContBlock = CGF.createBasicBlock("vaarg.end"); 1988c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGF.Builder.CreateCondBr(InRegs, InRegBlock, InMemBlock); 1989c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1990c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Emit code to load the value if it was passed in registers. 1991c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1992c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGF.EmitBlock(InRegBlock); 1993c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 1994c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.5.7p5: Step 4. Fetch type from l->reg_save_area with 1995c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // an offset of l->gp_offset and/or l->fp_offset. This may require 1996c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // copying to a temporary location in case the parameter is passed 1997c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // in different register classes or requires an alignment greater 1998c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // than 8 for general purpose registers and 16 for XMM registers. 1999c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // 2000c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // FIXME: This really results in shameful code when we end up needing to 2001c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // collect arguments from different places; often what should result in a 2002c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // simple assembling of a structure from scattered addresses has many more 2003c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // loads than necessary. Can we clean this up? 2004c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov const llvm::Type *LTy = CGF.ConvertTypeForMem(Ty); 2005c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *RegAddr = 2006c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGF.Builder.CreateLoad(CGF.Builder.CreateStructGEP(VAListAddr, 3), 2007c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov "reg_save_area"); 2008c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (neededInt && neededSSE) { 2009c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // FIXME: Cleanup. 2010800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner assert(AI.isDirect() && "Unexpected ABI info for mixed regs"); 2011c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov const llvm::StructType *ST = cast<llvm::StructType>(AI.getCoerceToType()); 2012c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *Tmp = CGF.CreateTempAlloca(ST); 2013c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov assert(ST->getNumElements() == 2 && "Unexpected ABI info for mixed regs"); 2014c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov const llvm::Type *TyLo = ST->getElementType(0); 2015c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov const llvm::Type *TyHi = ST->getElementType(1); 2016a8b7a7d3eaa51dd200cba1e5541f2542d24d7a6eChris Lattner assert((TyLo->isFPOrFPVectorTy() ^ TyHi->isFPOrFPVectorTy()) && 2017c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov "Unexpected ABI info for mixed regs"); 201896e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson const llvm::Type *PTyLo = llvm::PointerType::getUnqual(TyLo); 201996e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson const llvm::Type *PTyHi = llvm::PointerType::getUnqual(TyHi); 2020c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *GPAddr = CGF.Builder.CreateGEP(RegAddr, gp_offset); 2021c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *FPAddr = CGF.Builder.CreateGEP(RegAddr, fp_offset); 2022f177d9d6c27fbbcee8c00fd90b8306985c03c54aDuncan Sands llvm::Value *RegLoAddr = TyLo->isFloatingPointTy() ? FPAddr : GPAddr; 2023f177d9d6c27fbbcee8c00fd90b8306985c03c54aDuncan Sands llvm::Value *RegHiAddr = TyLo->isFloatingPointTy() ? GPAddr : FPAddr; 2024c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *V = 2025c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGF.Builder.CreateLoad(CGF.Builder.CreateBitCast(RegLoAddr, PTyLo)); 2026c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGF.Builder.CreateStore(V, CGF.Builder.CreateStructGEP(Tmp, 0)); 2027c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov V = CGF.Builder.CreateLoad(CGF.Builder.CreateBitCast(RegHiAddr, PTyHi)); 2028c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGF.Builder.CreateStore(V, CGF.Builder.CreateStructGEP(Tmp, 1)); 2029c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2030a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson RegAddr = CGF.Builder.CreateBitCast(Tmp, 203196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(LTy)); 2032c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } else if (neededInt) { 2033c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov RegAddr = CGF.Builder.CreateGEP(RegAddr, gp_offset); 2034c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov RegAddr = CGF.Builder.CreateBitCast(RegAddr, 203596e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(LTy)); 2036dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner } else if (neededSSE == 1) { 2037dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner RegAddr = CGF.Builder.CreateGEP(RegAddr, fp_offset); 2038dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner RegAddr = CGF.Builder.CreateBitCast(RegAddr, 2039dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner llvm::PointerType::getUnqual(LTy)); 2040c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } else { 2041dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner assert(neededSSE == 2 && "Invalid number of needed registers!"); 2042dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner // SSE registers are spaced 16 bytes apart in the register save 2043dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner // area, we need to collect the two eightbytes together. 2044dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner llvm::Value *RegAddrLo = CGF.Builder.CreateGEP(RegAddr, fp_offset); 20451090a9ba0902380dbd97d0a500daa4c373712df9Chris Lattner llvm::Value *RegAddrHi = CGF.Builder.CreateConstGEP1_32(RegAddrLo, 16); 2046dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner const llvm::Type *DoubleTy = llvm::Type::getDoubleTy(VMContext); 2047dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner const llvm::Type *DblPtrTy = 2048dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner llvm::PointerType::getUnqual(DoubleTy); 2049dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner const llvm::StructType *ST = llvm::StructType::get(VMContext, DoubleTy, 2050dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner DoubleTy, NULL); 2051dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner llvm::Value *V, *Tmp = CGF.CreateTempAlloca(ST); 2052dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner V = CGF.Builder.CreateLoad(CGF.Builder.CreateBitCast(RegAddrLo, 2053dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner DblPtrTy)); 2054dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner CGF.Builder.CreateStore(V, CGF.Builder.CreateStructGEP(Tmp, 0)); 2055dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner V = CGF.Builder.CreateLoad(CGF.Builder.CreateBitCast(RegAddrHi, 2056dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner DblPtrTy)); 2057dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner CGF.Builder.CreateStore(V, CGF.Builder.CreateStructGEP(Tmp, 1)); 2058dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner RegAddr = CGF.Builder.CreateBitCast(Tmp, 2059dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner llvm::PointerType::getUnqual(LTy)); 2060c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 2061c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2062c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // AMD64-ABI 3.5.7p5: Step 5. Set: 2063c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // l->gp_offset = l->gp_offset + num_gp * 8 2064c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // l->fp_offset = l->fp_offset + num_fp * 16. 2065c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (neededInt) { 206677b89b87c3b9220fea1bc80f6d6598d2003cc8a8Chris Lattner llvm::Value *Offset = llvm::ConstantInt::get(CGF.Int32Ty, neededInt * 8); 2067c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGF.Builder.CreateStore(CGF.Builder.CreateAdd(gp_offset, Offset), 2068c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov gp_offset_p); 2069c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 2070c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov if (neededSSE) { 207177b89b87c3b9220fea1bc80f6d6598d2003cc8a8Chris Lattner llvm::Value *Offset = llvm::ConstantInt::get(CGF.Int32Ty, neededSSE * 16); 2072c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGF.Builder.CreateStore(CGF.Builder.CreateAdd(fp_offset, Offset), 2073c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov fp_offset_p); 2074c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 2075c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGF.EmitBranch(ContBlock); 2076c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2077c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Emit code to load the value if it was passed in memory. 2078c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2079c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGF.EmitBlock(InMemBlock); 2080c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *MemAddr = EmitVAArgFromMemory(VAListAddr, Ty, CGF); 2081c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2082c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // Return the appropriate result. 2083c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2084c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGF.EmitBlock(ContBlock); 2085c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::PHINode *ResAddr = CGF.Builder.CreatePHI(RegAddr->getType(), 2086c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov "vaarg.addr"); 2087c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov ResAddr->reserveOperandSpace(2); 2088c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov ResAddr->addIncoming(RegAddr, InRegBlock); 2089c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov ResAddr->addIncoming(MemAddr, InMemBlock); 2090c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return ResAddr; 2091c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 2092c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2093a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA TakumiABIArgInfo WinX86_64ABIInfo::classify(QualType Ty) const { 2094a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi 2095a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi if (Ty->isVoidType()) 2096a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi return ABIArgInfo::getIgnore(); 2097a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi 2098a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi if (const EnumType *EnumTy = Ty->getAs<EnumType>()) 2099a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi Ty = EnumTy->getDecl()->getIntegerType(); 2100a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi 2101a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi uint64_t Size = getContext().getTypeSize(Ty); 2102a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi 2103a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi if (const RecordType *RT = Ty->getAs<RecordType>()) { 2104ff8be0e08e409af53130d12ce36019b35288fb78NAKAMURA Takumi if (hasNonTrivialDestructorOrCopyConstructor(RT) || 2105ff8be0e08e409af53130d12ce36019b35288fb78NAKAMURA Takumi RT->getDecl()->hasFlexibleArrayMember()) 2106a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi return ABIArgInfo::getIndirect(0, /*ByVal=*/false); 2107a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi 2108a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi // FIXME: mingw64-gcc emits 128-bit struct as i128 2109ff8be0e08e409af53130d12ce36019b35288fb78NAKAMURA Takumi if (Size <= 128 && 2110ff8be0e08e409af53130d12ce36019b35288fb78NAKAMURA Takumi (Size & (Size - 1)) == 0) 2111a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi return ABIArgInfo::getDirect(llvm::IntegerType::get(getVMContext(), 2112a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi Size)); 2113a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi 2114a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi return ABIArgInfo::getIndirect(0, /*ByVal=*/false); 2115a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi } 2116a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi 2117a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi if (Ty->isPromotableIntegerType()) 2118a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi return ABIArgInfo::getExtend(); 2119a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi 2120a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi return ABIArgInfo::getDirect(); 2121a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi} 2122a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi 2123a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumivoid WinX86_64ABIInfo::computeInfo(CGFunctionInfo &FI) const { 2124a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi 2125a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi QualType RetTy = FI.getReturnType(); 2126a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi FI.getReturnInfo() = classify(RetTy); 2127a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi 2128a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi for (CGFunctionInfo::arg_iterator it = FI.arg_begin(), ie = FI.arg_end(); 2129a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi it != ie; ++it) 2130a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi it->info = classify(it->type); 2131a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi} 2132a75732201b19059a0e56a88b0eb5a0e5dd3c6ca3NAKAMURA Takumi 2133f13721dd91dda7675e499331a2770308ad20ca61Chris Lattnerllvm::Value *WinX86_64ABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 2134f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner CodeGenFunction &CGF) const { 2135f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner const llvm::Type *BP = llvm::Type::getInt8PtrTy(CGF.getLLVMContext()); 2136f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner const llvm::Type *BPP = llvm::PointerType::getUnqual(BP); 2137f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner 2138f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner CGBuilderTy &Builder = CGF.Builder; 2139f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner llvm::Value *VAListAddrAsBPP = Builder.CreateBitCast(VAListAddr, BPP, 2140f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner "ap"); 2141f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner llvm::Value *Addr = Builder.CreateLoad(VAListAddrAsBPP, "ap.cur"); 2142f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner llvm::Type *PTy = 2143f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner llvm::PointerType::getUnqual(CGF.ConvertType(Ty)); 2144f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner llvm::Value *AddrTyped = Builder.CreateBitCast(Addr, PTy); 2145f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner 2146f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner uint64_t Offset = 2147f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner llvm::RoundUpToAlignment(CGF.getContext().getTypeSize(Ty) / 8, 8); 2148f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner llvm::Value *NextAddr = 2149f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner Builder.CreateGEP(Addr, llvm::ConstantInt::get(CGF.Int32Ty, Offset), 2150f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner "ap.next"); 2151f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner Builder.CreateStore(NextAddr, VAListAddrAsBPP); 2152dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner 2153f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner return AddrTyped; 2154f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner} 2155dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner 2156ec853ba1087f606e9685cb1e800616565ba35093John McCall// PowerPC-32 2157ec853ba1087f606e9685cb1e800616565ba35093John McCall 2158ec853ba1087f606e9685cb1e800616565ba35093John McCallnamespace { 2159ec853ba1087f606e9685cb1e800616565ba35093John McCallclass PPC32TargetCodeGenInfo : public DefaultTargetCodeGenInfo { 2160ec853ba1087f606e9685cb1e800616565ba35093John McCallpublic: 2161ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner PPC32TargetCodeGenInfo(CodeGenTypes &CGT) : DefaultTargetCodeGenInfo(CGT) {} 21628bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 2163ec853ba1087f606e9685cb1e800616565ba35093John McCall int getDwarfEHStackPointer(CodeGen::CodeGenModule &M) const { 2164ec853ba1087f606e9685cb1e800616565ba35093John McCall // This is recovered from gcc output. 2165ec853ba1087f606e9685cb1e800616565ba35093John McCall return 1; // r1 is the dedicated stack pointer 2166ec853ba1087f606e9685cb1e800616565ba35093John McCall } 2167ec853ba1087f606e9685cb1e800616565ba35093John McCall 2168ec853ba1087f606e9685cb1e800616565ba35093John McCall bool initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF, 21698bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer llvm::Value *Address) const; 2170ec853ba1087f606e9685cb1e800616565ba35093John McCall}; 2171ec853ba1087f606e9685cb1e800616565ba35093John McCall 2172ec853ba1087f606e9685cb1e800616565ba35093John McCall} 2173ec853ba1087f606e9685cb1e800616565ba35093John McCall 2174ec853ba1087f606e9685cb1e800616565ba35093John McCallbool 2175ec853ba1087f606e9685cb1e800616565ba35093John McCallPPC32TargetCodeGenInfo::initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF, 2176ec853ba1087f606e9685cb1e800616565ba35093John McCall llvm::Value *Address) const { 2177ec853ba1087f606e9685cb1e800616565ba35093John McCall // This is calculated from the LLVM and GCC tables and verified 2178ec853ba1087f606e9685cb1e800616565ba35093John McCall // against gcc output. AFAIK all ABIs use the same encoding. 2179ec853ba1087f606e9685cb1e800616565ba35093John McCall 2180ec853ba1087f606e9685cb1e800616565ba35093John McCall CodeGen::CGBuilderTy &Builder = CGF.Builder; 2181ec853ba1087f606e9685cb1e800616565ba35093John McCall llvm::LLVMContext &Context = CGF.getLLVMContext(); 2182ec853ba1087f606e9685cb1e800616565ba35093John McCall 2183ec853ba1087f606e9685cb1e800616565ba35093John McCall const llvm::IntegerType *i8 = llvm::Type::getInt8Ty(Context); 2184ec853ba1087f606e9685cb1e800616565ba35093John McCall llvm::Value *Four8 = llvm::ConstantInt::get(i8, 4); 2185ec853ba1087f606e9685cb1e800616565ba35093John McCall llvm::Value *Eight8 = llvm::ConstantInt::get(i8, 8); 2186ec853ba1087f606e9685cb1e800616565ba35093John McCall llvm::Value *Sixteen8 = llvm::ConstantInt::get(i8, 16); 2187ec853ba1087f606e9685cb1e800616565ba35093John McCall 2188ec853ba1087f606e9685cb1e800616565ba35093John McCall // 0-31: r0-31, the 4-byte general-purpose registers 2189aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall AssignToArrayRange(Builder, Address, Four8, 0, 31); 2190ec853ba1087f606e9685cb1e800616565ba35093John McCall 2191ec853ba1087f606e9685cb1e800616565ba35093John McCall // 32-63: fp0-31, the 8-byte floating-point registers 2192aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall AssignToArrayRange(Builder, Address, Eight8, 32, 63); 2193ec853ba1087f606e9685cb1e800616565ba35093John McCall 2194ec853ba1087f606e9685cb1e800616565ba35093John McCall // 64-76 are various 4-byte special-purpose registers: 2195ec853ba1087f606e9685cb1e800616565ba35093John McCall // 64: mq 2196ec853ba1087f606e9685cb1e800616565ba35093John McCall // 65: lr 2197ec853ba1087f606e9685cb1e800616565ba35093John McCall // 66: ctr 2198ec853ba1087f606e9685cb1e800616565ba35093John McCall // 67: ap 2199ec853ba1087f606e9685cb1e800616565ba35093John McCall // 68-75 cr0-7 2200ec853ba1087f606e9685cb1e800616565ba35093John McCall // 76: xer 2201aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall AssignToArrayRange(Builder, Address, Four8, 64, 76); 2202ec853ba1087f606e9685cb1e800616565ba35093John McCall 2203ec853ba1087f606e9685cb1e800616565ba35093John McCall // 77-108: v0-31, the 16-byte vector registers 2204aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall AssignToArrayRange(Builder, Address, Sixteen8, 77, 108); 2205ec853ba1087f606e9685cb1e800616565ba35093John McCall 2206ec853ba1087f606e9685cb1e800616565ba35093John McCall // 109: vrsave 2207ec853ba1087f606e9685cb1e800616565ba35093John McCall // 110: vscr 2208ec853ba1087f606e9685cb1e800616565ba35093John McCall // 111: spe_acc 2209ec853ba1087f606e9685cb1e800616565ba35093John McCall // 112: spefscr 2210ec853ba1087f606e9685cb1e800616565ba35093John McCall // 113: sfp 2211aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall AssignToArrayRange(Builder, Address, Four8, 109, 113); 2212ec853ba1087f606e9685cb1e800616565ba35093John McCall 22138bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer return false; 2214ec853ba1087f606e9685cb1e800616565ba35093John McCall} 2215ec853ba1087f606e9685cb1e800616565ba35093John McCall 2216ec853ba1087f606e9685cb1e800616565ba35093John McCall 2217dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner//===----------------------------------------------------------------------===// 221834d91fddd0252d64456cdcea0bd22073f006f4e2Daniel Dunbar// ARM ABI Implementation 2219dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner//===----------------------------------------------------------------------===// 222034d91fddd0252d64456cdcea0bd22073f006f4e2Daniel Dunbar 222134d91fddd0252d64456cdcea0bd22073f006f4e2Daniel Dunbarnamespace { 222234d91fddd0252d64456cdcea0bd22073f006f4e2Daniel Dunbar 2223c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovclass ARMABIInfo : public ABIInfo { 22245e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbarpublic: 22255e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar enum ABIKind { 22265e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar APCS = 0, 22275e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar AAPCS = 1, 22285e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar AAPCS_VFP 22295e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar }; 22305e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar 22315e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbarprivate: 22325e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar ABIKind Kind; 22335e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar 22345e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbarpublic: 2235ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner ARMABIInfo(CodeGenTypes &CGT, ABIKind _Kind) : ABIInfo(CGT), Kind(_Kind) {} 22365e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar 22375e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbarprivate: 22385e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar ABIKind getABIKind() const { return Kind; } 22395e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar 2240a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ABIArgInfo classifyReturnType(QualType RetTy) const; 2241a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ABIArgInfo classifyArgumentType(QualType RetTy) const; 2242c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2243ee5dcd064a811edc90f6c1fb31a837b6c961fed7Chris Lattner virtual void computeInfo(CGFunctionInfo &FI) const; 2244c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2245c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov virtual llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 2246c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CodeGenFunction &CGF) const; 2247c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov}; 2248c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 224982d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikovclass ARMTargetCodeGenInfo : public TargetCodeGenInfo { 225082d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikovpublic: 2251ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner ARMTargetCodeGenInfo(CodeGenTypes &CGT, ARMABIInfo::ABIKind K) 2252ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner :TargetCodeGenInfo(new ARMABIInfo(CGT, K)) {} 22536374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 22546374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall int getDwarfEHStackPointer(CodeGen::CodeGenModule &M) const { 22556374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall return 13; 22566374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall } 225782d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov}; 225882d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 225934d91fddd0252d64456cdcea0bd22073f006f4e2Daniel Dunbar} 226034d91fddd0252d64456cdcea0bd22073f006f4e2Daniel Dunbar 2261ee5dcd064a811edc90f6c1fb31a837b6c961fed7Chris Lattnervoid ARMABIInfo::computeInfo(CGFunctionInfo &FI) const { 2262a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner FI.getReturnInfo() = classifyReturnType(FI.getReturnType()); 2263c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov for (CGFunctionInfo::arg_iterator it = FI.arg_begin(), ie = FI.arg_end(); 2264a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner it != ie; ++it) 2265a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner it->info = classifyArgumentType(it->type); 22665e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar 2267a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner const llvm::Triple &Triple(getContext().Target.getTriple()); 226825117ab35c1a033846073183314c68ef07d1701aRafael Espindola llvm::CallingConv::ID DefaultCC; 22691ed1a594e9befc91ebf00d81b41a2fdfab862657Rafael Espindola if (Triple.getEnvironmentName() == "gnueabi" || 22701ed1a594e9befc91ebf00d81b41a2fdfab862657Rafael Espindola Triple.getEnvironmentName() == "eabi") 227125117ab35c1a033846073183314c68ef07d1701aRafael Espindola DefaultCC = llvm::CallingConv::ARM_AAPCS; 22721ed1a594e9befc91ebf00d81b41a2fdfab862657Rafael Espindola else 22731ed1a594e9befc91ebf00d81b41a2fdfab862657Rafael Espindola DefaultCC = llvm::CallingConv::ARM_APCS; 227425117ab35c1a033846073183314c68ef07d1701aRafael Espindola 22755e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar switch (getABIKind()) { 22765e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar case APCS: 227725117ab35c1a033846073183314c68ef07d1701aRafael Espindola if (DefaultCC != llvm::CallingConv::ARM_APCS) 227825117ab35c1a033846073183314c68ef07d1701aRafael Espindola FI.setEffectiveCallingConvention(llvm::CallingConv::ARM_APCS); 22795e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar break; 22805e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar 22815e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar case AAPCS: 228225117ab35c1a033846073183314c68ef07d1701aRafael Espindola if (DefaultCC != llvm::CallingConv::ARM_AAPCS) 228325117ab35c1a033846073183314c68ef07d1701aRafael Espindola FI.setEffectiveCallingConvention(llvm::CallingConv::ARM_AAPCS); 22845e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar break; 22855e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar 22865e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar case AAPCS_VFP: 22875e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar FI.setEffectiveCallingConvention(llvm::CallingConv::ARM_AAPCS_VFP); 22885e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar break; 22895e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar } 2290c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 2291c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2292a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris LattnerABIArgInfo ARMABIInfo::classifyArgumentType(QualType Ty) const { 2293d608cdb7c044365cf4e8764ade1e11e99c176078John McCall if (!isAggregateTypeForABI(Ty)) { 2294aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor // Treat an enum type as its underlying type. 2295aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor if (const EnumType *EnumTy = Ty->getAs<EnumType>()) 2296aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor Ty = EnumTy->getDecl()->getIntegerType(); 2297aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor 2298cc6fa88666ca2f287df4a600eb31a4087bab9c13Anton Korobeynikov return (Ty->isPromotableIntegerType() ? 2299cc6fa88666ca2f287df4a600eb31a4087bab9c13Anton Korobeynikov ABIArgInfo::getExtend() : ABIArgInfo::getDirect()); 2300aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor } 230198303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 2302420255710694e958fa04bed1d80d96508949879eDaniel Dunbar // Ignore empty records. 2303a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner if (isEmptyRecord(getContext(), Ty, true)) 2304420255710694e958fa04bed1d80d96508949879eDaniel Dunbar return ABIArgInfo::getIgnore(); 2305420255710694e958fa04bed1d80d96508949879eDaniel Dunbar 23060eb1d9733801764cd8b692c67e117e4feeecf013Rafael Espindola // Structures with either a non-trivial destructor or a non-trivial 23070eb1d9733801764cd8b692c67e117e4feeecf013Rafael Espindola // copy constructor are always indirect. 23080eb1d9733801764cd8b692c67e117e4feeecf013Rafael Espindola if (isRecordWithNonTrivialDestructorOrCopyConstructor(Ty)) 23090eb1d9733801764cd8b692c67e117e4feeecf013Rafael Espindola return ABIArgInfo::getIndirect(0, /*ByVal=*/false); 23100eb1d9733801764cd8b692c67e117e4feeecf013Rafael Espindola 23118aa87c71d9bfec14e135c683b0d7b9de999dbcb0Daniel Dunbar // Otherwise, pass by coercing to a structure of the appropriate size. 23128aa87c71d9bfec14e135c683b0d7b9de999dbcb0Daniel Dunbar // 2313c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // FIXME: This is kind of nasty... but there isn't much choice because the ARM 2314c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // backend doesn't support byval. 2315c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // FIXME: This doesn't handle alignment > 64 bits. 2316c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov const llvm::Type* ElemTy; 2317c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov unsigned SizeRegs; 2318a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner if (getContext().getTypeAlign(Ty) > 32) { 2319a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ElemTy = llvm::Type::getInt64Ty(getVMContext()); 2320a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner SizeRegs = (getContext().getTypeSize(Ty) + 63) / 64; 2321c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } else { 2322a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ElemTy = llvm::Type::getInt32Ty(getVMContext()); 2323a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner SizeRegs = (getContext().getTypeSize(Ty) + 31) / 32; 2324c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 2325c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov std::vector<const llvm::Type*> LLVMFields; 232696e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson LLVMFields.push_back(llvm::ArrayType::get(ElemTy, SizeRegs)); 2327a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner const llvm::Type* STy = llvm::StructType::get(getVMContext(), LLVMFields, 2328a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner true); 2329800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner return ABIArgInfo::getDirect(STy); 2330c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 2331c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2332a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattnerstatic bool isIntegerLikeType(QualType Ty, ASTContext &Context, 233398303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar llvm::LLVMContext &VMContext) { 233498303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // APCS, C Language Calling Conventions, Non-Simple Return Values: A structure 233598303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // is called integer-like if its size is less than or equal to one word, and 233698303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // the offset of each of its addressable sub-fields is zero. 233798303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 233898303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar uint64_t Size = Context.getTypeSize(Ty); 233998303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 234098303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // Check that the type fits in a word. 234198303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar if (Size > 32) 234298303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar return false; 234398303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 234498303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // FIXME: Handle vector types! 234598303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar if (Ty->isVectorType()) 234698303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar return false; 234798303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 2348b0d58196808aba4b3d1a7488bd5566f3c0a83e89Daniel Dunbar // Float types are never treated as "integer like". 2349b0d58196808aba4b3d1a7488bd5566f3c0a83e89Daniel Dunbar if (Ty->isRealFloatingType()) 2350b0d58196808aba4b3d1a7488bd5566f3c0a83e89Daniel Dunbar return false; 2351b0d58196808aba4b3d1a7488bd5566f3c0a83e89Daniel Dunbar 235298303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // If this is a builtin or pointer type then it is ok. 2353183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall if (Ty->getAs<BuiltinType>() || Ty->isPointerType()) 235498303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar return true; 235598303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 23564581581881d3f7349bf5a4b39d761bce688f9164Daniel Dunbar // Small complex integer types are "integer like". 23574581581881d3f7349bf5a4b39d761bce688f9164Daniel Dunbar if (const ComplexType *CT = Ty->getAs<ComplexType>()) 23584581581881d3f7349bf5a4b39d761bce688f9164Daniel Dunbar return isIntegerLikeType(CT->getElementType(), Context, VMContext); 235998303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 236098303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // Single element and zero sized arrays should be allowed, by the definition 236198303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // above, but they are not. 236298303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 236398303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // Otherwise, it must be a record type. 236498303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar const RecordType *RT = Ty->getAs<RecordType>(); 236598303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar if (!RT) return false; 236698303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 236798303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // Ignore records with flexible arrays. 236898303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar const RecordDecl *RD = RT->getDecl(); 236998303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar if (RD->hasFlexibleArrayMember()) 237098303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar return false; 237198303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 237298303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // Check that all sub-fields are at offset 0, and are themselves "integer 237398303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // like". 237498303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar const ASTRecordLayout &Layout = Context.getASTRecordLayout(RD); 237598303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 237698303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar bool HadField = false; 237798303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar unsigned idx = 0; 237898303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar for (RecordDecl::field_iterator i = RD->field_begin(), e = RD->field_end(); 237998303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar i != e; ++i, ++idx) { 238098303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar const FieldDecl *FD = *i; 238198303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 2382679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar // Bit-fields are not addressable, we only need to verify they are "integer 2383679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar // like". We still have to disallow a subsequent non-bitfield, for example: 2384679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar // struct { int : 0; int x } 2385679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar // is non-integer like according to gcc. 2386679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar if (FD->isBitField()) { 2387679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar if (!RD->isUnion()) 2388679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar HadField = true; 2389679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar 2390679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar if (!isIntegerLikeType(FD->getType(), Context, VMContext)) 2391679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar return false; 239298303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 2393679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar continue; 239498303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar } 239598303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 2396679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar // Check if this field is at offset 0. 2397679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar if (Layout.getFieldOffset(idx) != 0) 2398679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar return false; 2399679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar 240098303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar if (!isIntegerLikeType(FD->getType(), Context, VMContext)) 240198303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar return false; 24028bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer 2403679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar // Only allow at most one field in a structure. This doesn't match the 2404679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar // wording above, but follows gcc in situations with a field following an 2405679855a6e14fbc6c6838c566aa74c32f52f4f946Daniel Dunbar // empty structure. 240698303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar if (!RD->isUnion()) { 240798303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar if (HadField) 240898303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar return false; 240998303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 241098303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar HadField = true; 241198303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar } 241298303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar } 241398303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 241498303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar return true; 241598303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar} 241698303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 2417a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris LattnerABIArgInfo ARMABIInfo::classifyReturnType(QualType RetTy) const { 241898303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar if (RetTy->isVoidType()) 2419c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return ABIArgInfo::getIgnore(); 242098303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 2421f554b1cc3083d9ed1fb9b52a305025f744e90d08Daniel Dunbar // Large vector types should be returned via memory. 2422f554b1cc3083d9ed1fb9b52a305025f744e90d08Daniel Dunbar if (RetTy->isVectorType() && getContext().getTypeSize(RetTy) > 128) 2423f554b1cc3083d9ed1fb9b52a305025f744e90d08Daniel Dunbar return ABIArgInfo::getIndirect(0); 2424f554b1cc3083d9ed1fb9b52a305025f744e90d08Daniel Dunbar 2425d608cdb7c044365cf4e8764ade1e11e99c176078John McCall if (!isAggregateTypeForABI(RetTy)) { 2426aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor // Treat an enum type as its underlying type. 2427aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor if (const EnumType *EnumTy = RetTy->getAs<EnumType>()) 2428aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor RetTy = EnumTy->getDecl()->getIntegerType(); 2429aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor 2430cc6fa88666ca2f287df4a600eb31a4087bab9c13Anton Korobeynikov return (RetTy->isPromotableIntegerType() ? 2431cc6fa88666ca2f287df4a600eb31a4087bab9c13Anton Korobeynikov ABIArgInfo::getExtend() : ABIArgInfo::getDirect()); 2432aa74a1e49f7c4b89539830290f76fe2c3e97187fDouglas Gregor } 243398303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 24340eb1d9733801764cd8b692c67e117e4feeecf013Rafael Espindola // Structures with either a non-trivial destructor or a non-trivial 24350eb1d9733801764cd8b692c67e117e4feeecf013Rafael Espindola // copy constructor are always indirect. 24360eb1d9733801764cd8b692c67e117e4feeecf013Rafael Espindola if (isRecordWithNonTrivialDestructorOrCopyConstructor(RetTy)) 24370eb1d9733801764cd8b692c67e117e4feeecf013Rafael Espindola return ABIArgInfo::getIndirect(0, /*ByVal=*/false); 24380eb1d9733801764cd8b692c67e117e4feeecf013Rafael Espindola 243998303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // Are we following APCS? 244098303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar if (getABIKind() == APCS) { 2441a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner if (isEmptyRecord(getContext(), RetTy, false)) 244298303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar return ABIArgInfo::getIgnore(); 244398303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 24444cc753f4503931763cfb762a95928b44fcbe64e9Daniel Dunbar // Complex types are all returned as packed integers. 24454cc753f4503931763cfb762a95928b44fcbe64e9Daniel Dunbar // 24464cc753f4503931763cfb762a95928b44fcbe64e9Daniel Dunbar // FIXME: Consider using 2 x vector types if the back end handles them 24474cc753f4503931763cfb762a95928b44fcbe64e9Daniel Dunbar // correctly. 24484cc753f4503931763cfb762a95928b44fcbe64e9Daniel Dunbar if (RetTy->isAnyComplexType()) 2449800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner return ABIArgInfo::getDirect(llvm::IntegerType::get(getVMContext(), 2450a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner getContext().getTypeSize(RetTy))); 24514cc753f4503931763cfb762a95928b44fcbe64e9Daniel Dunbar 245298303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // Integer like structures are returned in r0. 2453a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner if (isIntegerLikeType(RetTy, getContext(), getVMContext())) { 245498303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // Return in the smallest viable integer type. 2455a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner uint64_t Size = getContext().getTypeSize(RetTy); 245698303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar if (Size <= 8) 2457800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner return ABIArgInfo::getDirect(llvm::Type::getInt8Ty(getVMContext())); 245898303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar if (Size <= 16) 2459800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner return ABIArgInfo::getDirect(llvm::Type::getInt16Ty(getVMContext())); 2460800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner return ABIArgInfo::getDirect(llvm::Type::getInt32Ty(getVMContext())); 246198303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar } 246298303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 246398303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // Otherwise return in memory. 246498303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar return ABIArgInfo::getIndirect(0); 2465c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 246698303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 246798303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // Otherwise this is an AAPCS variant. 246898303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar 2469a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner if (isEmptyRecord(getContext(), RetTy, true)) 247016a0808b7992db2c2ba78b387e1732bbb0fb371bDaniel Dunbar return ABIArgInfo::getIgnore(); 247116a0808b7992db2c2ba78b387e1732bbb0fb371bDaniel Dunbar 247298303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // Aggregates <= 4 bytes are returned in r0; other aggregates 247398303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar // are returned indirectly. 2474a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner uint64_t Size = getContext().getTypeSize(RetTy); 247516a0808b7992db2c2ba78b387e1732bbb0fb371bDaniel Dunbar if (Size <= 32) { 247616a0808b7992db2c2ba78b387e1732bbb0fb371bDaniel Dunbar // Return in the smallest viable integer type. 247716a0808b7992db2c2ba78b387e1732bbb0fb371bDaniel Dunbar if (Size <= 8) 2478800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner return ABIArgInfo::getDirect(llvm::Type::getInt8Ty(getVMContext())); 247916a0808b7992db2c2ba78b387e1732bbb0fb371bDaniel Dunbar if (Size <= 16) 2480800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner return ABIArgInfo::getDirect(llvm::Type::getInt16Ty(getVMContext())); 2481800588fd230d2c37ddce8fbf4a3881352715d700Chris Lattner return ABIArgInfo::getDirect(llvm::Type::getInt32Ty(getVMContext())); 248216a0808b7992db2c2ba78b387e1732bbb0fb371bDaniel Dunbar } 248316a0808b7992db2c2ba78b387e1732bbb0fb371bDaniel Dunbar 248498303b93ae335bbb4731f6f1f8164d3c70648346Daniel Dunbar return ABIArgInfo::getIndirect(0); 2485c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 2486c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2487c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikovllvm::Value *ARMABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 248877b89b87c3b9220fea1bc80f6d6598d2003cc8a8Chris Lattner CodeGenFunction &CGF) const { 2489c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov // FIXME: Need to handle alignment 24903c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *BP = llvm::Type::getInt8PtrTy(CGF.getLLVMContext()); 249196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson const llvm::Type *BPP = llvm::PointerType::getUnqual(BP); 2492c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2493c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov CGBuilderTy &Builder = CGF.Builder; 2494c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *VAListAddrAsBPP = Builder.CreateBitCast(VAListAddr, BPP, 2495c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov "ap"); 2496c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *Addr = Builder.CreateLoad(VAListAddrAsBPP, "ap.cur"); 2497c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Type *PTy = 249896e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(CGF.ConvertType(Ty)); 2499c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *AddrTyped = Builder.CreateBitCast(Addr, PTy); 2500c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2501c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov uint64_t Offset = 2502c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::RoundUpToAlignment(CGF.getContext().getTypeSize(Ty) / 8, 4); 2503c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov llvm::Value *NextAddr = 250477b89b87c3b9220fea1bc80f6d6598d2003cc8a8Chris Lattner Builder.CreateGEP(Addr, llvm::ConstantInt::get(CGF.Int32Ty, Offset), 2505c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov "ap.next"); 2506c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov Builder.CreateStore(NextAddr, VAListAddrAsBPP); 2507c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2508c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov return AddrTyped; 2509c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 2510c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2511dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner//===----------------------------------------------------------------------===// 251234d91fddd0252d64456cdcea0bd22073f006f4e2Daniel Dunbar// SystemZ ABI Implementation 2513dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner//===----------------------------------------------------------------------===// 251434d91fddd0252d64456cdcea0bd22073f006f4e2Daniel Dunbar 251589e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikovnamespace { 251634d91fddd0252d64456cdcea0bd22073f006f4e2Daniel Dunbar 251789e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikovclass SystemZABIInfo : public ABIInfo { 2518ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattnerpublic: 2519ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner SystemZABIInfo(CodeGenTypes &CGT) : ABIInfo(CGT) {} 2520ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner 252189e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov bool isPromotableIntegerType(QualType Ty) const; 252289e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov 2523a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ABIArgInfo classifyReturnType(QualType RetTy) const; 2524a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ABIArgInfo classifyArgumentType(QualType RetTy) const; 252589e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov 2526ee5dcd064a811edc90f6c1fb31a837b6c961fed7Chris Lattner virtual void computeInfo(CGFunctionInfo &FI) const { 2527a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner FI.getReturnInfo() = classifyReturnType(FI.getReturnType()); 252889e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov for (CGFunctionInfo::arg_iterator it = FI.arg_begin(), ie = FI.arg_end(); 252989e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov it != ie; ++it) 2530a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner it->info = classifyArgumentType(it->type); 253189e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov } 253289e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov 253389e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov virtual llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 253489e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov CodeGenFunction &CGF) const; 253589e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov}; 253634d91fddd0252d64456cdcea0bd22073f006f4e2Daniel Dunbar 253782d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikovclass SystemZTargetCodeGenInfo : public TargetCodeGenInfo { 253882d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikovpublic: 2539ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner SystemZTargetCodeGenInfo(CodeGenTypes &CGT) 2540ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner : TargetCodeGenInfo(new SystemZABIInfo(CGT)) {} 254182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov}; 254282d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 254389e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov} 254489e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov 254589e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikovbool SystemZABIInfo::isPromotableIntegerType(QualType Ty) const { 254689e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov // SystemZ ABI requires all 8, 16 and 32 bit quantities to be extended. 2547183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall if (const BuiltinType *BT = Ty->getAs<BuiltinType>()) 254889e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov switch (BT->getKind()) { 254989e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov case BuiltinType::Bool: 255089e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov case BuiltinType::Char_S: 255189e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov case BuiltinType::Char_U: 255289e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov case BuiltinType::SChar: 255389e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov case BuiltinType::UChar: 255489e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov case BuiltinType::Short: 255589e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov case BuiltinType::UShort: 255689e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov case BuiltinType::Int: 255789e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov case BuiltinType::UInt: 255889e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov return true; 255989e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov default: 256089e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov return false; 256189e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov } 256289e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov return false; 256389e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov} 256489e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov 256589e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikovllvm::Value *SystemZABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 256689e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov CodeGenFunction &CGF) const { 256789e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov // FIXME: Implement 256889e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov return 0; 256989e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov} 257089e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov 257189e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov 2572a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris LattnerABIArgInfo SystemZABIInfo::classifyReturnType(QualType RetTy) const { 2573a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner if (RetTy->isVoidType()) 257489e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov return ABIArgInfo::getIgnore(); 2575d608cdb7c044365cf4e8764ade1e11e99c176078John McCall if (isAggregateTypeForABI(RetTy)) 257689e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov return ABIArgInfo::getIndirect(0); 2577a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner 2578a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner return (isPromotableIntegerType(RetTy) ? 2579a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ABIArgInfo::getExtend() : ABIArgInfo::getDirect()); 258089e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov} 258189e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov 2582a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris LattnerABIArgInfo SystemZABIInfo::classifyArgumentType(QualType Ty) const { 2583d608cdb7c044365cf4e8764ade1e11e99c176078John McCall if (isAggregateTypeForABI(Ty)) 258489e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov return ABIArgInfo::getIndirect(0); 2585a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner 2586a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner return (isPromotableIntegerType(Ty) ? 2587a3c109bbf6e198f463fbe204da4d25b40dab65c4Chris Lattner ABIArgInfo::getExtend() : ABIArgInfo::getDirect()); 258889e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov} 258989e887fd73dd87c1118e13ebddf11aed9e25b763Anton Korobeynikov 2590dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner//===----------------------------------------------------------------------===// 2591276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck// MBlaze ABI Implementation 2592276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck//===----------------------------------------------------------------------===// 2593276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2594276fdf408050d205f3a7f34c1e788224a67d2098Wesley Pecknamespace { 2595276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2596276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peckclass MBlazeABIInfo : public ABIInfo { 2597276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peckpublic: 2598276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck MBlazeABIInfo(CodeGenTypes &CGT) : ABIInfo(CGT) {} 2599276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2600276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck bool isPromotableIntegerType(QualType Ty) const; 2601276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2602276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck ABIArgInfo classifyReturnType(QualType RetTy) const; 2603276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck ABIArgInfo classifyArgumentType(QualType RetTy) const; 2604276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2605276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck virtual void computeInfo(CGFunctionInfo &FI) const { 2606276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck FI.getReturnInfo() = classifyReturnType(FI.getReturnType()); 2607276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck for (CGFunctionInfo::arg_iterator it = FI.arg_begin(), ie = FI.arg_end(); 2608276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck it != ie; ++it) 2609276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck it->info = classifyArgumentType(it->type); 2610276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck } 2611276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2612276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck virtual llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 2613276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck CodeGenFunction &CGF) const; 2614276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck}; 2615276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2616276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peckclass MBlazeTargetCodeGenInfo : public TargetCodeGenInfo { 2617276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peckpublic: 2618276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck MBlazeTargetCodeGenInfo(CodeGenTypes &CGT) 2619276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck : TargetCodeGenInfo(new MBlazeABIInfo(CGT)) {} 2620276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck void SetTargetAttributes(const Decl *D, llvm::GlobalValue *GV, 2621276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck CodeGen::CodeGenModule &M) const; 2622276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck}; 2623276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2624276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck} 2625276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2626276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peckbool MBlazeABIInfo::isPromotableIntegerType(QualType Ty) const { 2627276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck // MBlaze ABI requires all 8 and 16 bit quantities to be extended. 2628276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck if (const BuiltinType *BT = Ty->getAs<BuiltinType>()) 2629276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck switch (BT->getKind()) { 2630276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck case BuiltinType::Bool: 2631276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck case BuiltinType::Char_S: 2632276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck case BuiltinType::Char_U: 2633276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck case BuiltinType::SChar: 2634276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck case BuiltinType::UChar: 2635276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck case BuiltinType::Short: 2636276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck case BuiltinType::UShort: 2637276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck return true; 2638276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck default: 2639276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck return false; 2640276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck } 2641276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck return false; 2642276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck} 2643276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2644276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peckllvm::Value *MBlazeABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 2645276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck CodeGenFunction &CGF) const { 2646276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck // FIXME: Implement 2647276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck return 0; 2648276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck} 2649276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2650276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2651276fdf408050d205f3a7f34c1e788224a67d2098Wesley PeckABIArgInfo MBlazeABIInfo::classifyReturnType(QualType RetTy) const { 2652276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck if (RetTy->isVoidType()) 2653276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck return ABIArgInfo::getIgnore(); 2654276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck if (isAggregateTypeForABI(RetTy)) 2655276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck return ABIArgInfo::getIndirect(0); 2656276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2657276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck return (isPromotableIntegerType(RetTy) ? 2658276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck ABIArgInfo::getExtend() : ABIArgInfo::getDirect()); 2659276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck} 2660276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2661276fdf408050d205f3a7f34c1e788224a67d2098Wesley PeckABIArgInfo MBlazeABIInfo::classifyArgumentType(QualType Ty) const { 2662276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck if (isAggregateTypeForABI(Ty)) 2663276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck return ABIArgInfo::getIndirect(0); 2664276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2665276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck return (isPromotableIntegerType(Ty) ? 2666276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck ABIArgInfo::getExtend() : ABIArgInfo::getDirect()); 2667276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck} 2668276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2669276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peckvoid MBlazeTargetCodeGenInfo::SetTargetAttributes(const Decl *D, 2670276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck llvm::GlobalValue *GV, 2671276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck CodeGen::CodeGenModule &M) 2672276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck const { 2673276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck const FunctionDecl *FD = dyn_cast<FunctionDecl>(D); 2674276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck if (!FD) return; 2675125b4cb35536e45201f8f2cb19ee620e3ad67c49NAKAMURA Takumi 2676276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck llvm::CallingConv::ID CC = llvm::CallingConv::C; 2677276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck if (FD->hasAttr<MBlazeInterruptHandlerAttr>()) 2678276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck CC = llvm::CallingConv::MBLAZE_INTR; 2679276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck else if (FD->hasAttr<MBlazeSaveVolatilesAttr>()) 2680276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck CC = llvm::CallingConv::MBLAZE_SVOL; 2681276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2682276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck if (CC != llvm::CallingConv::C) { 2683276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck // Handle 'interrupt_handler' attribute: 2684276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck llvm::Function *F = cast<llvm::Function>(GV); 2685276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2686276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck // Step 1: Set ISR calling convention. 2687276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck F->setCallingConv(CC); 2688276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2689276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck // Step 2: Add attributes goodness. 2690276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck F->addFnAttr(llvm::Attribute::NoInline); 2691276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck } 2692276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2693276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck // Step 3: Emit _interrupt_handler alias. 2694276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck if (CC == llvm::CallingConv::MBLAZE_INTR) 2695276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck new llvm::GlobalAlias(GV->getType(), llvm::Function::ExternalLinkage, 2696276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck "_interrupt_handler", GV, &M.getModule()); 2697276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck} 2698276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2699276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 2700276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck//===----------------------------------------------------------------------===// 270182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov// MSP430 ABI Implementation 2702dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner//===----------------------------------------------------------------------===// 270382d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 270482d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikovnamespace { 270582d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 270682d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikovclass MSP430TargetCodeGenInfo : public TargetCodeGenInfo { 270782d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikovpublic: 2708ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner MSP430TargetCodeGenInfo(CodeGenTypes &CGT) 2709ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner : TargetCodeGenInfo(new DefaultABIInfo(CGT)) {} 271082d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov void SetTargetAttributes(const Decl *D, llvm::GlobalValue *GV, 271182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov CodeGen::CodeGenModule &M) const; 271282d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov}; 271382d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 2714c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 2715c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 271682d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikovvoid MSP430TargetCodeGenInfo::SetTargetAttributes(const Decl *D, 271782d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov llvm::GlobalValue *GV, 271882d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov CodeGen::CodeGenModule &M) const { 271982d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 272082d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov if (const MSP430InterruptAttr *attr = FD->getAttr<MSP430InterruptAttr>()) { 272182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov // Handle 'interrupt' attribute: 272282d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov llvm::Function *F = cast<llvm::Function>(GV); 272382d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 272482d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov // Step 1: Set ISR calling convention. 272582d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov F->setCallingConv(llvm::CallingConv::MSP430_INTR); 272682d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 272782d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov // Step 2: Add attributes goodness. 272882d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov F->addFnAttr(llvm::Attribute::NoInline); 272982d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 273082d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov // Step 3: Emit ISR vector alias. 273182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov unsigned Num = attr->getNumber() + 0xffe0; 273282d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov new llvm::GlobalAlias(GV->getType(), llvm::Function::ExternalLinkage, 273377d6605159dd7b512be8e555f4fe78b2d6c34290Benjamin Kramer "vector_" + llvm::Twine::utohexstr(Num), 273482d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov GV, &M.getModule()); 273582d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov } 273682d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov } 2737c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 2738c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 2739dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner//===----------------------------------------------------------------------===// 2740aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall// MIPS ABI Implementation. This works for both little-endian and 2741aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall// big-endian variants. 2742dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner//===----------------------------------------------------------------------===// 2743dce5ad0cf70ba74e1ecdbb5e81f1a81d97821636Chris Lattner 2744aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCallnamespace { 2745aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCallclass MIPSTargetCodeGenInfo : public TargetCodeGenInfo { 2746aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCallpublic: 2747ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner MIPSTargetCodeGenInfo(CodeGenTypes &CGT) 2748ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner : TargetCodeGenInfo(new DefaultABIInfo(CGT)) {} 2749aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall 2750aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall int getDwarfEHStackPointer(CodeGen::CodeGenModule &CGM) const { 2751aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall return 29; 2752aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall } 2753aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall 2754aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall bool initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF, 27558bea82f6699e4384ef823cdc8800ad5db271177cMichael J. Spencer llvm::Value *Address) const; 2756aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall}; 2757aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall} 2758aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall 2759aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCallbool 2760aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCallMIPSTargetCodeGenInfo::initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF, 2761aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall llvm::Value *Address) const { 2762aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // This information comes from gcc's implementation, which seems to 2763aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // as canonical as it gets. 2764aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall 2765aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall CodeGen::CGBuilderTy &Builder = CGF.Builder; 2766aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall llvm::LLVMContext &Context = CGF.getLLVMContext(); 2767aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall 2768aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // Everything on MIPS is 4 bytes. Double-precision FP registers 2769aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // are aliased to pairs of single-precision FP registers. 2770aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall const llvm::IntegerType *i8 = llvm::Type::getInt8Ty(Context); 2771aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall llvm::Value *Four8 = llvm::ConstantInt::get(i8, 4); 2772aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall 2773aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // 0-31 are the general purpose registers, $0 - $31. 2774aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // 32-63 are the floating-point registers, $f0 - $f31. 2775aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // 64 and 65 are the multiply/divide registers, $hi and $lo. 2776aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // 66 is the (notional, I think) register for signal-handler return. 2777aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall AssignToArrayRange(Builder, Address, Four8, 0, 65); 2778aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall 2779aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // 67-74 are the floating-point status registers, $fcc0 - $fcc7. 2780aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // They are one bit wide and ignored here. 2781aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall 2782aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // 80-111 are the coprocessor 0 registers, $c0r0 - $c0r31. 2783aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // (coprocessor 1 is the FP unit) 2784aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // 112-143 are the coprocessor 2 registers, $c2r0 - $c2r31. 2785aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // 144-175 are the coprocessor 3 registers, $c3r0 - $c3r31. 2786aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall // 176-181 are the DSP accumulator registers. 2787aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall AssignToArrayRange(Builder, Address, Four8, 80, 181); 2788aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall 2789aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall return false; 2790aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall} 2791aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall 2792aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall 2793ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattnerconst TargetCodeGenInfo &CodeGenModule::getTargetCodeGenInfo() { 279482d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov if (TheTargetCodeGenInfo) 279582d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov return *TheTargetCodeGenInfo; 2796c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov 279782d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov // For now we just cache the TargetCodeGenInfo in CodeGenModule and don't 279882d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov // free it. 27992c0843f166a82f251b20370fadab57878969e7aaDaniel Dunbar 28009c254f0415bef9a0bafe5b5026ddb54b727597b1Chris Lattner const llvm::Triple &Triple = getContext().Target.getTriple(); 28011752ee4849f4c37f5e03193e658be92650b0e65aDaniel Dunbar switch (Triple.getArch()) { 28022c0843f166a82f251b20370fadab57878969e7aaDaniel Dunbar default: 2803ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner return *(TheTargetCodeGenInfo = new DefaultTargetCodeGenInfo(Types)); 28042c0843f166a82f251b20370fadab57878969e7aaDaniel Dunbar 2805aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall case llvm::Triple::mips: 2806aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall case llvm::Triple::mipsel: 2807ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner return *(TheTargetCodeGenInfo = new MIPSTargetCodeGenInfo(Types)); 2808aeeb7011a875d3dd439e9fa07dc3ac54d97785b9John McCall 280934d91fddd0252d64456cdcea0bd22073f006f4e2Daniel Dunbar case llvm::Triple::arm: 281034d91fddd0252d64456cdcea0bd22073f006f4e2Daniel Dunbar case llvm::Triple::thumb: 28115e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar // FIXME: We want to know the float calling convention as well. 2812018ba5ab0671d9b6eefecaffc118c869bea151a1Daniel Dunbar if (strcmp(getContext().Target.getABI(), "apcs-gnu") == 0) 281382d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov return *(TheTargetCodeGenInfo = 2814ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner new ARMTargetCodeGenInfo(Types, ARMABIInfo::APCS)); 28155e7bacef79f7725f4abc45e2a5eccedae40dfcd3Daniel Dunbar 281682d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov return *(TheTargetCodeGenInfo = 2817ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner new ARMTargetCodeGenInfo(Types, ARMABIInfo::AAPCS)); 281834d91fddd0252d64456cdcea0bd22073f006f4e2Daniel Dunbar 2819ec853ba1087f606e9685cb1e800616565ba35093John McCall case llvm::Triple::ppc: 2820ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner return *(TheTargetCodeGenInfo = new PPC32TargetCodeGenInfo(Types)); 2821ec853ba1087f606e9685cb1e800616565ba35093John McCall 282234d91fddd0252d64456cdcea0bd22073f006f4e2Daniel Dunbar case llvm::Triple::systemz: 2823ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner return *(TheTargetCodeGenInfo = new SystemZTargetCodeGenInfo(Types)); 282482d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 2825276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck case llvm::Triple::mblaze: 2826276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck return *(TheTargetCodeGenInfo = new MBlazeTargetCodeGenInfo(Types)); 2827276fdf408050d205f3a7f34c1e788224a67d2098Wesley Peck 282882d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov case llvm::Triple::msp430: 2829ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner return *(TheTargetCodeGenInfo = new MSP430TargetCodeGenInfo(Types)); 283034d91fddd0252d64456cdcea0bd22073f006f4e2Daniel Dunbar 28311752ee4849f4c37f5e03193e658be92650b0e65aDaniel Dunbar case llvm::Triple::x86: 28321752ee4849f4c37f5e03193e658be92650b0e65aDaniel Dunbar switch (Triple.getOS()) { 28337ee68bd706c0ade45d3d1e85c77e25678f5ab1e8Edward O'Callaghan case llvm::Triple::Darwin: 283482d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov return *(TheTargetCodeGenInfo = 2835ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner new X86_32TargetCodeGenInfo(Types, true, true)); 28362c0843f166a82f251b20370fadab57878969e7aaDaniel Dunbar case llvm::Triple::Cygwin: 28372c0843f166a82f251b20370fadab57878969e7aaDaniel Dunbar case llvm::Triple::MinGW32: 2838727e268bd2974a7b16af65a5cfdfe47da9ebeb6cEdward O'Callaghan case llvm::Triple::AuroraUX: 2839727e268bd2974a7b16af65a5cfdfe47da9ebeb6cEdward O'Callaghan case llvm::Triple::DragonFly: 284075c135a511c855d94bbfa7f00dd27a165f61e953David Chisnall case llvm::Triple::FreeBSD: 28412c0843f166a82f251b20370fadab57878969e7aaDaniel Dunbar case llvm::Triple::OpenBSD: 28428e50a96b387dca7525caa8a6add31420dd82a2cdBenjamin Kramer case llvm::Triple::NetBSD: 284382d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov return *(TheTargetCodeGenInfo = 2844ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner new X86_32TargetCodeGenInfo(Types, false, true)); 28452c0843f166a82f251b20370fadab57878969e7aaDaniel Dunbar 28462c0843f166a82f251b20370fadab57878969e7aaDaniel Dunbar default: 284782d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov return *(TheTargetCodeGenInfo = 2848ea0443212e7ec6ff82e2f174e8e948a6eb0e0876Chris Lattner new X86_32TargetCodeGenInfo(Types, false, false)); 2849c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 28502c0843f166a82f251b20370fadab57878969e7aaDaniel Dunbar 28512c0843f166a82f251b20370fadab57878969e7aaDaniel Dunbar case llvm::Triple::x86_64: 2852f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner switch (Triple.getOS()) { 2853f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner case llvm::Triple::Win32: 28540aa205765aec0aa5eed672f8e3cade543372edcdNAKAMURA Takumi case llvm::Triple::MinGW32: 2855f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner case llvm::Triple::Cygwin: 2856f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner return *(TheTargetCodeGenInfo = new WinX86_64TargetCodeGenInfo(Types)); 2857f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner default: 2858f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner return *(TheTargetCodeGenInfo = new X86_64TargetCodeGenInfo(Types)); 2859f13721dd91dda7675e499331a2770308ad20ca61Chris Lattner } 2860c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov } 2861c4a59eb306efeb4bffa3cefecd1e6392fc5c4144Anton Korobeynikov} 2862