CodeGenTypes.cpp revision 01c5d1ddc8bd589b629b8c0185c279d090bba115
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- CodeGenTypes.cpp - Type translation for LLVM CodeGen -------------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump// This is the code that handles AST -> LLVM type lowering. 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "CodeGenTypes.h" 15270e203b50ed8791e61afd357596bcf050cf2bfdDaniel Dunbar#include "CGCall.h" 16f16aa103d3afd42fbca2ab346f191bf745cec092John McCall#include "CGCXXABI.h" 172924ade97ee4228fcf3518d89cd4bd1653236b48Daniel Dunbar#include "CGRecordLayout.h" 18de7fb8413b13651fd85b7125d08b3c9ac2816d9dDaniel Dunbar#include "clang/AST/ASTContext.h" 19c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 20742cd1b7bb86b52b23b335d47abbd842dac0e1bfFariborz Jahanian#include "clang/AST/DeclCXX.h" 21de7fb8413b13651fd85b7125d08b3c9ac2816d9dDaniel Dunbar#include "clang/AST/Expr.h" 2219cc4abea06a9b49e0e16a50d335c064cd723572Anders Carlsson#include "clang/AST/RecordLayout.h" 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/DerivedTypes.h" 244e533287e6a9adac78c9ac370612581aad9b8c5eAnders Carlsson#include "llvm/Module.h" 25d9e9ede6b1703849da739629904dad197306e527Devang Patel#include "llvm/Target/TargetData.h" 265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace CodeGen; 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 297a4718e813e5e99d478567a482217c7eef8572c5Devang PatelCodeGenTypes::CodeGenTypes(ASTContext &Ctx, llvm::Module& M, 30f16aa103d3afd42fbca2ab346f191bf745cec092John McCall const llvm::TargetData &TD, const ABIInfo &Info, 3108d4792bb5d9e0e7f122c6273636807029c06aaaDaniel Dunbar CGCXXABI &CXXABI, const CodeGenOptions &CGO) 326b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar : Context(Ctx), Target(Ctx.Target), TheModule(M), TheTargetData(TD), 3308d4792bb5d9e0e7f122c6273636807029c06aaaDaniel Dunbar TheABIInfo(Info), TheCXXABI(CXXABI), CodeGenOpts(CGO) { 3457eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner SkippedLayout = false; 35d2d2a11a91d7ddf468bfb70f66362d24806ed601Chris Lattner} 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 37b84a06e68ffd71da22e3c75b6e4bbdba37816413Devang PatelCodeGenTypes::~CodeGenTypes() { 381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (llvm::DenseMap<const Type *, CGRecordLayout *>::iterator 391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump I = CGRecordLayouts.begin(), E = CGRecordLayouts.end(); 40b84a06e68ffd71da22e3c75b6e4bbdba37816413Devang Patel I != E; ++I) 41b84a06e68ffd71da22e3c75b6e4bbdba37816413Devang Patel delete I->second; 426f41c17ae854c8a26126e5ea1c3cd53bd746b7baChris Lattner 436f41c17ae854c8a26126e5ea1c3cd53bd746b7baChris Lattner for (llvm::FoldingSet<CGFunctionInfo>::iterator 446f41c17ae854c8a26126e5ea1c3cd53bd746b7baChris Lattner I = FunctionInfos.begin(), E = FunctionInfos.end(); I != E; ) 456f41c17ae854c8a26126e5ea1c3cd53bd746b7baChris Lattner delete &*I++; 46b84a06e68ffd71da22e3c75b6e4bbdba37816413Devang Patel} 47b84a06e68ffd71da22e3c75b6e4bbdba37816413Devang Patel 489cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattnervoid CodeGenTypes::addRecordTypeName(const RecordDecl *RD, 499cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::StructType *Ty, 50e0047b13f0025fa1588f1b776592ed3458b226d6Anders Carlsson llvm::StringRef suffix) { 51e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson llvm::SmallString<256> TypeName; 52e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson llvm::raw_svector_ostream OS(TypeName); 53e0047b13f0025fa1588f1b776592ed3458b226d6Anders Carlsson OS << RD->getKindName() << '.'; 54e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson 55e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson // Name the codegen type after the typedef name 56e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson // if there is no tag type name available 57e0047b13f0025fa1588f1b776592ed3458b226d6Anders Carlsson if (RD->getIdentifier()) { 58e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson // FIXME: We should not have to check for a null decl context here. 59e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson // Right now we do it because the implicit Obj-C decls don't have one. 60e0047b13f0025fa1588f1b776592ed3458b226d6Anders Carlsson if (RD->getDeclContext()) 61e0047b13f0025fa1588f1b776592ed3458b226d6Anders Carlsson OS << RD->getQualifiedNameAsString(); 62e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson else 63e0047b13f0025fa1588f1b776592ed3458b226d6Anders Carlsson RD->printName(OS); 64e0047b13f0025fa1588f1b776592ed3458b226d6Anders Carlsson } else if (const TypedefNameDecl *TDD = RD->getTypedefNameForAnonDecl()) { 65e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson // FIXME: We should not have to check for a null decl context here. 66e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson // Right now we do it because the implicit Obj-C decls don't have one. 67e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson if (TDD->getDeclContext()) 68e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson OS << TDD->getQualifiedNameAsString(); 69e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson else 70e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson TDD->printName(OS); 71e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson } else 72e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson OS << "anon"; 73e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson 74e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson if (!suffix.empty()) 75e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson OS << suffix; 76e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson 779cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner Ty->setName(OS.str()); 7830ec9972be5a5af1f7a2277360dfa3aa1540b4faDevang Patel} 7930ec9972be5a5af1f7a2277360dfa3aa1540b4faDevang Patel 804581fff8af09a156a9dcc4de62587385c5da9574Chris Lattner/// ConvertTypeForMem - Convert type T into a llvm::Type. This differs from 814581fff8af09a156a9dcc4de62587385c5da9574Chris Lattner/// ConvertType in that it is used to convert to the memory representation for 824581fff8af09a156a9dcc4de62587385c5da9574Chris Lattner/// a type. For example, the scalar representation for _Bool is i1, but the 834581fff8af09a156a9dcc4de62587385c5da9574Chris Lattner/// memory representation is usually i8 or i32, depending on the target. 849cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattnerllvm::Type *CodeGenTypes::ConvertTypeForMem(QualType T){ 859cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *R = ConvertType(T); 861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8719009e6fe7e0f51d2e49f4c94928a048c11c5281Chris Lattner // If this is a non-bool type, don't map it. 88f177d9d6c27fbbcee8c00fd90b8306985c03c54aDuncan Sands if (!R->isIntegerTy(1)) 8919009e6fe7e0f51d2e49f4c94928a048c11c5281Chris Lattner return R; 901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9119009e6fe7e0f51d2e49f4c94928a048c11c5281Chris Lattner // Otherwise, return an integer of the target-specified size. 920032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::IntegerType::get(getLLVMContext(), 930032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson (unsigned)Context.getTypeSize(T)); 9419009e6fe7e0f51d2e49f4c94928a048c11c5281Chris Lattner} 9519009e6fe7e0f51d2e49f4c94928a048c11c5281Chris Lattner 9671305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 9771305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner/// isRecordLayoutComplete - Return true if the specified type is already 9871305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner/// completely laid out. 9971305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattnerbool CodeGenTypes::isRecordLayoutComplete(const Type *Ty) const { 10071305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner llvm::DenseMap<const Type*, llvm::StructType *>::const_iterator I = 10171305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner RecordDeclTypes.find(Ty); 10271305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner return I != RecordDeclTypes.end() && !I->second->isOpaque(); 10371305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner} 10471305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 10571305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattnerstatic bool 10671305cc81bd379ddb8aa0d49e268267383202ca9Chris LattnerisSafeToConvert(QualType T, CodeGenTypes &CGT, 10771305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner llvm::SmallPtrSet<const RecordDecl*, 16> &AlreadyChecked); 10871305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 10971305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 11071305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner/// isSafeToConvert - Return true if it is safe to convert the specified record 11171305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner/// decl to IR and lay it out, false if doing so would cause us to get into a 11271305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner/// recursive compilation mess. 11371305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattnerstatic bool 11471305cc81bd379ddb8aa0d49e268267383202ca9Chris LattnerisSafeToConvert(const RecordDecl *RD, CodeGenTypes &CGT, 11571305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner llvm::SmallPtrSet<const RecordDecl*, 16> &AlreadyChecked) { 11671305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // If we have already checked this type (maybe the same type is used by-value 11771305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // multiple times in multiple structure fields, don't check again. 11871305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (!AlreadyChecked.insert(RD)) return true; 11971305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 12071305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner const Type *Key = CGT.getContext().getTagDeclType(RD).getTypePtr(); 12171305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 12271305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // If this type is already laid out, converting it is a noop. 12371305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (CGT.isRecordLayoutComplete(Key)) return true; 12471305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 12571305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // If this type is currently being laid out, we can't recursively compile it. 12671305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (CGT.isRecordBeingLaidOut(Key)) 12771305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner return false; 12871305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 12971305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // If this type would require laying out bases that are currently being laid 13071305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // out, don't do it. This includes virtual base classes which get laid out 13171305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // when a class is translated, even though they aren't embedded by-value into 13271305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // the class. 13371305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (const CXXRecordDecl *CRD = dyn_cast<CXXRecordDecl>(RD)) { 13471305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner for (CXXRecordDecl::base_class_const_iterator I = CRD->bases_begin(), 13571305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner E = CRD->bases_end(); I != E; ++I) 13671305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (!isSafeToConvert(I->getType()->getAs<RecordType>()->getDecl(), 13771305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner CGT, AlreadyChecked)) 13871305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner return false; 13971305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner } 14071305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 14171305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // If this type would require laying out members that are currently being laid 14271305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // out, don't do it. 14371305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner for (RecordDecl::field_iterator I = RD->field_begin(), 14471305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner E = RD->field_end(); I != E; ++I) 14571305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (!isSafeToConvert(I->getType(), CGT, AlreadyChecked)) 14671305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner return false; 14771305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 14871305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // If there are no problems, lets do it. 14971305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner return true; 15071305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner} 15171305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 15271305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner/// isSafeToConvert - Return true if it is safe to convert this field type, 15371305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner/// which requires the structure elements contained by-value to all be 15471305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner/// recursively safe to convert. 15571305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattnerstatic bool 15671305cc81bd379ddb8aa0d49e268267383202ca9Chris LattnerisSafeToConvert(QualType T, CodeGenTypes &CGT, 15771305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner llvm::SmallPtrSet<const RecordDecl*, 16> &AlreadyChecked) { 15871305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner T = T.getCanonicalType(); 15971305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 16071305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // If this is a record, check it. 16171305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (const RecordType *RT = dyn_cast<RecordType>(T)) 16271305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner return isSafeToConvert(RT->getDecl(), CGT, AlreadyChecked); 16371305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 16471305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // If this is an array, check the elements, which are embedded inline. 16571305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 16671305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner return isSafeToConvert(AT->getElementType(), CGT, AlreadyChecked); 16771305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 16871305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // Otherwise, there is no concern about transforming this. We only care about 16971305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // things that are contained by-value in a structure that can have another 17071305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // structure as a member. 17171305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner return true; 17271305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner} 17371305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 17471305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 17571305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner/// isSafeToConvert - Return true if it is safe to convert the specified record 17671305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner/// decl to IR and lay it out, false if doing so would cause us to get into a 17771305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner/// recursive compilation mess. 17871305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattnerstatic bool isSafeToConvert(const RecordDecl *RD, CodeGenTypes &CGT) { 17971305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // If no structs are being laid out, we can certainly do this one. 18071305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (CGT.noRecordsBeingLaidOut()) return true; 18171305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 18271305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner llvm::SmallPtrSet<const RecordDecl*, 16> AlreadyChecked; 18371305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner return isSafeToConvert(RD, CGT, AlreadyChecked); 18471305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner} 18571305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 18671305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 187f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// isFuncTypeArgumentConvertible - Return true if the specified type in a 188f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// function argument or result position can be converted to an IR type at this 189f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// point. This boils down to being whether it is complete, as well as whether 190f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// we've temporarily deferred expanding the type because we're in a recursive 191f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// context. 19271305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattnerbool CodeGenTypes::isFuncTypeArgumentConvertible(QualType Ty) { 193f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // If this isn't a tagged type, we can convert it! 194f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner const TagType *TT = Ty->getAs<TagType>(); 195f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (TT == 0) return true; 196f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 197f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 19871305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // If it's a tagged type used by-value, but is just a forward decl, we can't 19971305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // convert it. Note that getDefinition()==0 is not the same as !isDefinition. 20071305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (TT->getDecl()->getDefinition() == 0) 201f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner return false; 202f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 20371305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // If this is an enum, then it is always safe to convert. 204f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner const RecordType *RT = dyn_cast<RecordType>(TT); 205f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (RT == 0) return true; 206f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 207f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // Otherwise, we have to be careful. If it is a struct that we're in the 208f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // process of expanding, then we can't convert the function type. That's ok 209f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // though because we must be in a pointer context under the struct, so we can 210f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // just convert it to a dummy type. 211f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // 212f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // We decide this by checking whether ConvertRecordDeclType returns us an 213f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // opaque type for a struct that we know is defined. 21471305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner return isSafeToConvert(RT->getDecl(), *this); 215f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner} 216f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 217f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 218f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// Code to verify a given function type is complete, i.e. the return type 219f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// and all of the argument types are complete. Also check to see if we are in 220f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// a RS_StructPointer context, and if so whether any struct types have been 221f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// pended. If so, we don't want to ask the ABI lowering code to handle a type 222f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// that cannot be converted to an IR type. 223f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattnerbool CodeGenTypes::isFuncTypeConvertible(const FunctionType *FT) { 224f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (!isFuncTypeArgumentConvertible(FT->getResultType())) 225f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner return false; 226f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 227f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT)) 2289cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner for (unsigned i = 0, e = FPT->getNumArgs(); i != e; i++) 229f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (!isFuncTypeArgumentConvertible(FPT->getArgType(i))) 230f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner return false; 231f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 232f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner return true; 233b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman} 234b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman 235c5b8806cda286cf41866176ef98011fdaa68da01Chris Lattner/// UpdateCompletedType - When we find the full definition for a TagDecl, 236c5b8806cda286cf41866176ef98011fdaa68da01Chris Lattner/// replace the 'opaque' type we previously made for it if applicable. 237c5b8806cda286cf41866176ef98011fdaa68da01Chris Lattnervoid CodeGenTypes::UpdateCompletedType(const TagDecl *TD) { 2389cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If this is an enum being completed, then we flush all non-struct types from 2399cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // the cache. This allows function types and other things that may be derived 2409cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // from the enum to be recomputed. 2418dd5cdfc462026648b480adaf774e24bc620f7c3Chris Lattner if (const EnumDecl *ED = dyn_cast<EnumDecl>(TD)) { 2428dd5cdfc462026648b480adaf774e24bc620f7c3Chris Lattner // Only flush the cache if we've actually already converted this type. 2432045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner if (TypeCache.count(ED->getTypeForDecl())) { 2442045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner // Okay, we formed some types based on this. We speculated that the enum 2452045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner // would be lowered to i32, so we only need to flush the cache if this 2462045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner // didn't happen. 2472045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner if (!ConvertType(ED->getIntegerType())->isIntegerTy(32)) 2482045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner TypeCache.clear(); 2492045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner } 2509cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return; 251b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman } 2529cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 253f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // If we completed a RecordDecl that we previously used and converted to an 254f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // anonymous type, then go ahead and complete it now. 2559cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const RecordDecl *RD = cast<RecordDecl>(TD); 256f0a8679b6e6635117533b89894646f1450cea25bChris Lattner if (RD->isDependentType()) return; 257f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 258f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // Only complete it if we converted it already. If we haven't converted it 259f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // yet, we'll just do it lazily. 2603ade97504790bbc5a148baa5b3f7e577aed9c1c6Chris Lattner if (RecordDeclTypes.count(Context.getTagDeclType(RD).getTypePtr())) 2619cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ConvertRecordDeclType(RD); 262d86e6bc7ab4388a578daf46e7c76be9122a25072Chris Lattner} 263d86e6bc7ab4388a578daf46e7c76be9122a25072Chris Lattner 2649cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattnerstatic llvm::Type *getTypeForFormat(llvm::LLVMContext &VMContext, 2659cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const llvm::fltSemantics &format) { 266b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner if (&format == &llvm::APFloat::IEEEsingle) 2670032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::Type::getFloatTy(VMContext); 268b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner if (&format == &llvm::APFloat::IEEEdouble) 2690032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::Type::getDoubleTy(VMContext); 270b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner if (&format == &llvm::APFloat::IEEEquad) 2710032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::Type::getFP128Ty(VMContext); 272b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner if (&format == &llvm::APFloat::PPCDoubleDouble) 2730032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::Type::getPPC_FP128Ty(VMContext); 274b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner if (&format == &llvm::APFloat::x87DoubleExtended) 2750032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::Type::getX86_FP80Ty(VMContext); 276b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner assert(0 && "Unknown float format!"); 277f6a943e047f541619a2202f9e43b20b3d7c0a96dEli Friedman return 0; 278f6a943e047f541619a2202f9e43b20b3d7c0a96dEli Friedman} 279f6a943e047f541619a2202f9e43b20b3d7c0a96dEli Friedman 2809cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner/// ConvertType - Convert the specified type to its LLVM form. 2819cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattnerllvm::Type *CodeGenTypes::ConvertType(QualType T) { 2829cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner T = Context.getCanonicalType(T); 2839cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 2849cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const Type *Ty = T.getTypePtr(); 2851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2869cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // RecordTypes are cached and processed specially. 2879cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (const RecordType *RT = dyn_cast<RecordType>(Ty)) 2889cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return ConvertRecordDeclType(RT->getDecl()); 2899cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 2909cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // See if type is already cached. 2919cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::DenseMap<const Type *, llvm::Type *>::iterator TCI = TypeCache.find(Ty); 2929cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If type is found in map then use it. Otherwise, convert type T. 2939cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (TCI != TypeCache.end()) 2949cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return TCI->second; 2959cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 2969cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If we don't have it in the cache, convert it now. 2979cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *ResultType = 0; 2989cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner switch (Ty->getTypeClass()) { 2999cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner case Type::Record: // Handled above. 30072564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor#define TYPE(Class, Base) 30172564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor#define ABSTRACT_TYPE(Class, Base) 30272564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 30372564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor#define DEPENDENT_TYPE(Class, Base) case Type::Class: 304ad5e73887052193afda72db8efcb812bd083a4a8John McCall#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 30572564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor#include "clang/AST/TypeNodes.def" 306864c041e118155c2b1ce0ba36942a3da5a4a055eJohn McCall llvm_unreachable("Non-canonical or dependent types aren't possible."); 30772564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor break; 30872564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor 3095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Type::Builtin: { 3109cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner switch (cast<BuiltinType>(Ty)->getKind()) { 3115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::Void: 312de2e22d33afec98324a66a358dfe0951b3c7259aSteve Naroff case BuiltinType::ObjCId: 313de2e22d33afec98324a66a358dfe0951b3c7259aSteve Naroff case BuiltinType::ObjCClass: 31413dcd00615de5c4279d97bdf63cd5f0a14fd9dccFariborz Jahanian case BuiltinType::ObjCSel: 3155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // LLVM void type can only be used as the result of a function call. Just 3165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // map to the same as char. 3179cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::Type::getInt8Ty(getLLVMContext()); 3189cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 3195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::Bool: 32119009e6fe7e0f51d2e49f4c94928a048c11c5281Chris Lattner // Note that we always return bool as i1 for use as a scalar type. 3229cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::Type::getInt1Ty(getLLVMContext()); 3239cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 3241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 325d2d2a11a91d7ddf468bfb70f66362d24806ed601Chris Lattner case BuiltinType::Char_S: 326d2d2a11a91d7ddf468bfb70f66362d24806ed601Chris Lattner case BuiltinType::Char_U: 327d2d2a11a91d7ddf468bfb70f66362d24806ed601Chris Lattner case BuiltinType::SChar: 328d2d2a11a91d7ddf468bfb70f66362d24806ed601Chris Lattner case BuiltinType::UChar: 3295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::Short: 3305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::UShort: 3315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::Int: 3325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::UInt: 3335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::Long: 3345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::ULong: 3355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::LongLong: 3365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::ULongLong: 3373f59c975aa5d047f7edd1b900b5e885c38af0ef7Chris Lattner case BuiltinType::WChar_S: 3383f59c975aa5d047f7edd1b900b5e885c38af0ef7Chris Lattner case BuiltinType::WChar_U: 339f5c209d23b20ada4a9b6235db50317239cbf6ae1Alisdair Meredith case BuiltinType::Char16: 340f5c209d23b20ada4a9b6235db50317239cbf6ae1Alisdair Meredith case BuiltinType::Char32: 3419cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::IntegerType::get(getLLVMContext(), 3429cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner static_cast<unsigned>(Context.getTypeSize(T))); 3439cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 3441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 345f6a943e047f541619a2202f9e43b20b3d7c0a96dEli Friedman case BuiltinType::Float: 346c8b1227fa8c17d9881815e40c04e19334be536f8Nate Begeman case BuiltinType::Double: 3475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::LongDouble: 3489cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = getTypeForFormat(getLLVMContext(), 3499cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner Context.getFloatTypeSemantics(T)); 3509cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 3511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3529cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner case BuiltinType::NullPtr: 353c1eb14a66fdd955aff3f957a5843295f27952bddAnders Carlsson // Model std::nullptr_t as i8* 3549cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::Type::getInt8PtrTy(getLLVMContext()); 3559cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 356c1eb14a66fdd955aff3f957a5843295f27952bddAnders Carlsson 3572df9ced9fd1e8c7d7b38443db07e0e811de22571Chris Lattner case BuiltinType::UInt128: 3582df9ced9fd1e8c7d7b38443db07e0e811de22571Chris Lattner case BuiltinType::Int128: 3599cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::IntegerType::get(getLLVMContext(), 128); 3609cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 3618c69235d21dfb067efb530a8cf1f35d633394270Eli Friedman 3628c69235d21dfb067efb530a8cf1f35d633394270Eli Friedman case BuiltinType::Overload: 3638c69235d21dfb067efb530a8cf1f35d633394270Eli Friedman case BuiltinType::Dependent: 364864c041e118155c2b1ce0ba36942a3da5a4a055eJohn McCall case BuiltinType::BoundMember: 3651de4d4e8cb2e9c88809fea8092bc6e835a5473d2John McCall case BuiltinType::UnknownAny: 366864c041e118155c2b1ce0ba36942a3da5a4a055eJohn McCall llvm_unreachable("Unexpected placeholder builtin type!"); 3678c69235d21dfb067efb530a8cf1f35d633394270Eli Friedman break; 3685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 3705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Type::Complex: { 372ef6de3da8572607f786303c07150daa6e140ab19Jay Foad llvm::Type *EltTy = ConvertType(cast<ComplexType>(Ty)->getElementType()); 3739cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::StructType::get(EltTy, EltTy, NULL); 3749cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 3755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3767c80bd64032e610c0dbd74fc0ef6ea334447f2fdSebastian Redl case Type::LValueReference: 3777c80bd64032e610c0dbd74fc0ef6ea334447f2fdSebastian Redl case Type::RValueReference: { 3789cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const ReferenceType *RTy = cast<ReferenceType>(Ty); 3799cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner QualType ETy = RTy->getPointeeType(); 3809cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *PointeeType = ConvertTypeForMem(ETy); 381207f4d8543529221932af82836016a2ef066c917Peter Collingbourne unsigned AS = Context.getTargetAddressSpace(ETy); 3829cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::PointerType::get(PointeeType, AS); 3839cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 3846aeae7fa9cfaacba3a4077d62c01c2531d88a63eDaniel Dunbar } 3855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Type::Pointer: { 3869cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const PointerType *PTy = cast<PointerType>(Ty); 3879cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner QualType ETy = PTy->getPointeeType(); 3889cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *PointeeType = ConvertTypeForMem(ETy); 3899cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (PointeeType->isVoidTy()) 3909cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner PointeeType = llvm::Type::getInt8Ty(getLLVMContext()); 391207f4d8543529221932af82836016a2ef066c917Peter Collingbourne unsigned AS = Context.getTargetAddressSpace(ETy); 3929cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::PointerType::get(PointeeType, AS); 3939cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 3945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 396fb22d96692c5240fb8d611290dbf7eeed3759c73Steve Naroff case Type::VariableArray: { 3979cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const VariableArrayType *A = cast<VariableArrayType>(Ty); 3989cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner assert(A->getIndexTypeCVRQualifiers() == 0 && 3995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "FIXME: We only handle trivial array types so far!"); 400c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman // VLAs resolve to the innermost element type; this matches 401c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman // the return of alloca, and there isn't any obviously better choice. 4029cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = ConvertTypeForMem(A->getElementType()); 4039cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 404c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman } 405c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman case Type::IncompleteArray: { 4069cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const IncompleteArrayType *A = cast<IncompleteArrayType>(Ty); 4079cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner assert(A->getIndexTypeCVRQualifiers() == 0 && 408c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman "FIXME: We only handle trivial array types so far!"); 4093a2b657088de9413714a51bff153a59565adb3efChris Lattner // int X[] -> [0 x int], unless the element type is not sized. If it is 4103a2b657088de9413714a51bff153a59565adb3efChris Lattner // unsized (e.g. an incomplete struct) just use [0 x i8]. 4113a2b657088de9413714a51bff153a59565adb3efChris Lattner ResultType = ConvertTypeForMem(A->getElementType()); 4123a2b657088de9413714a51bff153a59565adb3efChris Lattner if (!ResultType->isSized()) { 4133a2b657088de9413714a51bff153a59565adb3efChris Lattner SkippedLayout = true; 4143a2b657088de9413714a51bff153a59565adb3efChris Lattner ResultType = llvm::Type::getInt8Ty(getLLVMContext()); 4153a2b657088de9413714a51bff153a59565adb3efChris Lattner } 4163a2b657088de9413714a51bff153a59565adb3efChris Lattner ResultType = llvm::ArrayType::get(ResultType, 0); 4179cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 4185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 419fb22d96692c5240fb8d611290dbf7eeed3759c73Steve Naroff case Type::ConstantArray: { 4209cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const ConstantArrayType *A = cast<ConstantArrayType>(Ty); 4212acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *EltTy = ConvertTypeForMem(A->getElementType()); 42201c5d1ddc8bd589b629b8c0185c279d090bba115Chris Lattner 42301c5d1ddc8bd589b629b8c0185c279d090bba115Chris Lattner // Lower arrays of undefined struct type to arrays of i8 just to have a 42401c5d1ddc8bd589b629b8c0185c279d090bba115Chris Lattner // concrete type. 42501c5d1ddc8bd589b629b8c0185c279d090bba115Chris Lattner if (!EltTy->isSized()) { 42601c5d1ddc8bd589b629b8c0185c279d090bba115Chris Lattner SkippedLayout = true; 42701c5d1ddc8bd589b629b8c0185c279d090bba115Chris Lattner EltTy = llvm::Type::getInt8Ty(getLLVMContext()); 42801c5d1ddc8bd589b629b8c0185c279d090bba115Chris Lattner } 42901c5d1ddc8bd589b629b8c0185c279d090bba115Chris Lattner 4309cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::ArrayType::get(EltTy, A->getSize().getZExtValue()); 4319cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 432fb22d96692c5240fb8d611290dbf7eeed3759c73Steve Naroff } 433213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begeman case Type::ExtVector: 4345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Type::Vector: { 4359cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const VectorType *VT = cast<VectorType>(Ty); 4369cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::VectorType::get(ConvertType(VT->getElementType()), 4379cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner VT->getNumElements()); 4389cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 4395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Type::FunctionNoProto: 441bb36d331f439f49859efcfb4435c61762fbba6f9Daniel Dunbar case Type::FunctionProto: { 44271305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner const FunctionType *FT = cast<FunctionType>(Ty); 443bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner // First, check whether we can build the full function type. If the 444bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner // function type depends on an incomplete type (e.g. a struct or enum), we 4459cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // cannot lower the function type. 44671305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (!isFuncTypeConvertible(FT)) { 4479cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // This function's type depends on an incomplete tag type. 4489cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // Return a placeholder type. 4499cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::StructType::get(getLLVMContext()); 45057eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner 45171305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner SkippedLayout = true; 4529cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 453b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman } 4549cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 455f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // While we're converting the argument types for a function, we don't want 456f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // to recursively convert any pointed-to structs. Converting directly-used 457f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // structs is ok though. 45871305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (!RecordsBeingLaidOut.insert(Ty)) { 45971305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner ResultType = llvm::StructType::get(getLLVMContext()); 46071305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 46171305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner SkippedLayout = true; 46271305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner break; 46371305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner } 464f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 465b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman // The function type can be built; call the appropriate routines to 466b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman // build it. 467bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner const CGFunctionInfo *FI; 468bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner bool isVariadic; 46971305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT)) { 470bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner FI = &getFunctionInfo( 4719cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner CanQual<FunctionProtoType>::CreateUnsafe(QualType(FPT, 0))); 472bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner isVariadic = FPT->isVariadic(); 473bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner } else { 47471305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner const FunctionNoProtoType *FNPT = cast<FunctionNoProtoType>(FT); 475bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner FI = &getFunctionInfo( 4769cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner CanQual<FunctionNoProtoType>::CreateUnsafe(QualType(FNPT, 0))); 477bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner isVariadic = true; 478bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner } 479f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 48071305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // If there is something higher level prodding our CGFunctionInfo, then 48171305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // don't recurse into it again. 48271305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (FunctionsBeingProcessed.count(FI)) { 48371305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 48471305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner ResultType = llvm::StructType::get(getLLVMContext()); 48571305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner SkippedLayout = true; 48671305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner } else { 48771305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 48871305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // Otherwise, we're good to go, go ahead and convert it. 48971305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner ResultType = GetFunctionType(*FI, isVariadic); 49071305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner } 49171305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 49271305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner RecordsBeingLaidOut.erase(Ty); 49357eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner 49457eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner if (SkippedLayout) 49557eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner TypeCache.clear(); 496f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 49771305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (RecordsBeingLaidOut.empty()) 498f0a8679b6e6635117533b89894646f1450cea25bChris Lattner while (!DeferredRecords.empty()) 499f0a8679b6e6635117533b89894646f1450cea25bChris Lattner ConvertRecordDeclType(DeferredRecords.pop_back_val()); 5009cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 501bb36d331f439f49859efcfb4435c61762fbba6f9Daniel Dunbar } 5021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 503c12c5bba6ceb6acd4e51e7a0fc03257da9cfd44eJohn McCall case Type::ObjCObject: 5049cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = ConvertType(cast<ObjCObjectType>(Ty)->getBaseType()); 5059cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 506c12c5bba6ceb6acd4e51e7a0fc03257da9cfd44eJohn McCall 507391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner case Type::ObjCInterface: { 508412f59b23fc502b199b9ca96c72ef5d5ad21d62bDaniel Dunbar // Objective-C interfaces are always opaque (outside of the 509412f59b23fc502b199b9ca96c72ef5d5ad21d62bDaniel Dunbar // runtime, which can do whatever it likes); we never refine 510412f59b23fc502b199b9ca96c72ef5d5ad21d62bDaniel Dunbar // these. 5119cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *&T = InterfaceTypes[cast<ObjCInterfaceType>(Ty)]; 512412f59b23fc502b199b9ca96c72ef5d5ad21d62bDaniel Dunbar if (!T) 5139cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner T = llvm::StructType::createNamed(getLLVMContext(), ""); 5149cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = T; 5159cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 516391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner } 5171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 51814108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff case Type::ObjCObjectPointer: { 51928e478010eb4d789da85c6378dbfa9d66b95830bDaniel Dunbar // Protocol qualifications do not influence the LLVM type, we just return a 52028e478010eb4d789da85c6378dbfa9d66b95830bDaniel Dunbar // pointer to the underlying interface type. We don't need to worry about 52128e478010eb4d789da85c6378dbfa9d66b95830bDaniel Dunbar // recursive conversion. 5222acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *T = 523181eeee36b057a1a66227123fad0978d1d0f034aChris Lattner ConvertTypeForMem(cast<ObjCObjectPointerType>(Ty)->getPointeeType()); 5249cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = T->getPointerTo(); 5259cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 52614108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff } 52728e478010eb4d789da85c6378dbfa9d66b95830bDaniel Dunbar 5282045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner case Type::Enum: { 5299cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const EnumDecl *ED = cast<EnumType>(Ty)->getDecl(); 5309cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (ED->isDefinition() || ED->isFixed()) 5319cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return ConvertType(ED->getIntegerType()); 5322045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner // Return a placeholder 'i32' type. This can be changed later when the 5332045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner // type is defined (see UpdateCompletedType), but is likely to be the 5342045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner // "right" answer. 5352045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner ResultType = llvm::Type::getInt32Ty(getLLVMContext()); 5369cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 537de0efb3b6eac36bdeae0e60f753a974cc4118a31Chris Lattner } 5389048891ff983d0681c116c6e8f1073aa31bdd6e8Daniel Dunbar 5399048891ff983d0681c116c6e8f1073aa31bdd6e8Daniel Dunbar case Type::BlockPointer: { 5409cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const QualType FTy = cast<BlockPointerType>(Ty)->getPointeeType(); 5419cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *PointeeType = ConvertTypeForMem(FTy); 542207f4d8543529221932af82836016a2ef066c917Peter Collingbourne unsigned AS = Context.getTargetAddressSpace(FTy); 5439cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::PointerType::get(PointeeType, AS); 5449cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 5459048891ff983d0681c116c6e8f1073aa31bdd6e8Daniel Dunbar } 546424c51d3d4bea87291919b75e73ca59386702ad5Sebastian Redl 5470e650017acdbbeb0c590e77bbea88c200ea1caefAnders Carlsson case Type::MemberPointer: { 5489cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = 5499cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner getCXXABI().ConvertMemberPointerType(cast<MemberPointerType>(Ty)); 5509cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 5510e650017acdbbeb0c590e77bbea88c200ea1caefAnders Carlsson } 5525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5539cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 5549cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner assert(ResultType && "Didn't convert a type?"); 5559cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 5569cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner TypeCache[Ty] = ResultType; 5579cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return ResultType; 5585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5609cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner/// ConvertRecordDeclType - Lay out a tagged decl type like struct or union. 5619cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattnerllvm::StructType *CodeGenTypes::ConvertRecordDeclType(const RecordDecl *RD) { 562efb6d0dc3eafbcf4f8cd053138bd1abed1dda8d4Daniel Dunbar // TagDecl's are not necessarily unique, instead use the (clang) 563efb6d0dc3eafbcf4f8cd053138bd1abed1dda8d4Daniel Dunbar // type connected to the decl. 5649cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const Type *Key = Context.getTagDeclType(RD).getTypePtr(); 5651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5669cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::StructType *&Entry = RecordDeclTypes[Key]; 5671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5689cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If we don't have a StructType at all yet, create the forward declaration. 569cd87d1e4d1b0097877b0f9c2065900717d2aacbaChris Lattner if (Entry == 0) { 570cd87d1e4d1b0097877b0f9c2065900717d2aacbaChris Lattner Entry = llvm::StructType::createNamed(getLLVMContext(), ""); 571cd87d1e4d1b0097877b0f9c2065900717d2aacbaChris Lattner addRecordTypeName(RD, Entry, ""); 572cd87d1e4d1b0097877b0f9c2065900717d2aacbaChris Lattner } 5739cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::StructType *Ty = Entry; 5745de00fcf7c923a14bb79bdbaabb2faeb5633d85aChris Lattner 5759cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If this is still a forward declaration, or the LLVM type is already 5769cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // complete, there's nothing more to do. 57771305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner RD = RD->getDefinition(); 57871305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (RD == 0 || !Ty->isOpaque()) 5799cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return Ty; 5809cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 58171305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // If converting this type would cause us to infinitely loop, don't do it! 58271305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (!isSafeToConvert(RD, *this)) { 5839cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner DeferredRecords.push_back(RD); 5849cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return Ty; 5859cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner } 5861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5879cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // Okay, this is a definition of a type. Compile the implementation now. 58871305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner bool InsertResult = RecordsBeingLaidOut.insert(Key); (void)InsertResult; 58971305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner assert(InsertResult && "Recursively compiling a struct?"); 59071305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 59186ff308724171494395a840fd2efbe25e62f352eJohn McCall // Force conversion of non-virtual base classes recursively. 5929cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (const CXXRecordDecl *CRD = dyn_cast<CXXRecordDecl>(RD)) { 5939cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner for (CXXRecordDecl::base_class_const_iterator i = CRD->bases_begin(), 5949cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner e = CRD->bases_end(); i != e; ++i) { 59571305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (i->isVirtual()) continue; 59671305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 59771305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner ConvertRecordDeclType(i->getType()->getAs<RecordType>()->getDecl()); 59886ff308724171494395a840fd2efbe25e62f352eJohn McCall } 59986ff308724171494395a840fd2efbe25e62f352eJohn McCall } 60086ff308724171494395a840fd2efbe25e62f352eJohn McCall 601696798febaf1f69020cdf7474b91e71736c5aa69Anders Carlsson // Layout fields. 6029cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner CGRecordLayout *Layout = ComputeRecordLayout(RD, Ty); 603696798febaf1f69020cdf7474b91e71736c5aa69Anders Carlsson CGRecordLayouts[Key] = Layout; 6041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 60571305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // We're done laying out this struct. 60671305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner bool EraseResult = RecordsBeingLaidOut.erase(Key); (void)EraseResult; 60771305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner assert(EraseResult && "struct not in RecordsBeingLaidOut set?"); 60871305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 609f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // If this struct blocked a FunctionType conversion, then recompute whatever 610f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // was derived from that. 611f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // FIXME: This is hugely overconservative. 61257eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner if (SkippedLayout) 61357eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner TypeCache.clear(); 61471305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner 61571305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // If we're done converting the outer-most record, then convert any deferred 61671305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner // structs as well. 61771305cc81bd379ddb8aa0d49e268267383202ca9Chris Lattner if (RecordsBeingLaidOut.empty()) 6189cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner while (!DeferredRecords.empty()) 6199cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ConvertRecordDeclType(DeferredRecords.pop_back_val()); 6209cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 6219cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return Ty; 6221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 623fc3b8e9c1381d5e6ec361591d649c56a870ff971Chris Lattner 6242d987772c2ba3bff93b9fbe7b73bf06eed2b1607Anders Carlsson/// getCGRecordLayout - Return record layout info for the given record decl. 625ad3e7118c40711faf5f51f08d599dbd525d3408aAnders Carlssonconst CGRecordLayout & 6262d987772c2ba3bff93b9fbe7b73bf06eed2b1607Anders CarlssonCodeGenTypes::getCGRecordLayout(const RecordDecl *RD) { 6272d987772c2ba3bff93b9fbe7b73bf06eed2b1607Anders Carlsson const Type *Key = Context.getTagDeclType(RD).getTypePtr(); 62882926963cccbc54bc707d5dcf79389166046ef08Anders Carlsson 629270e203b50ed8791e61afd357596bcf050cf2bfdDaniel Dunbar const CGRecordLayout *Layout = CGRecordLayouts.lookup(Key); 630c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson if (!Layout) { 6312d987772c2ba3bff93b9fbe7b73bf06eed2b1607Anders Carlsson // Compute the type information. 6329cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ConvertRecordDeclType(RD); 633c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson 634c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson // Now try again. 635c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson Layout = CGRecordLayouts.lookup(Key); 636c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson } 637c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson 638270e203b50ed8791e61afd357596bcf050cf2bfdDaniel Dunbar assert(Layout && "Unable to find record layout information for type"); 639270e203b50ed8791e61afd357596bcf050cf2bfdDaniel Dunbar return *Layout; 640b84a06e68ffd71da22e3c75b6e4bbdba37816413Devang Patel} 6413e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson 642f16aa103d3afd42fbca2ab346f191bf745cec092John McCallbool CodeGenTypes::isZeroInitializable(QualType T) { 6433e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson // No need to check for member pointers when not compiling C++. 6443e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson if (!Context.getLangOptions().CPlusPlus) 645f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return true; 6463e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson 6473e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson T = Context.getBaseElementType(T); 6483e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson 649f16aa103d3afd42fbca2ab346f191bf745cec092John McCall // Records are non-zero-initializable if they contain any 650f16aa103d3afd42fbca2ab346f191bf745cec092John McCall // non-zero-initializable subobjects. 6513e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson if (const RecordType *RT = T->getAs<RecordType>()) { 6523e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson const CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 653f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return isZeroInitializable(RD); 6543e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson } 655f16aa103d3afd42fbca2ab346f191bf745cec092John McCall 656f16aa103d3afd42fbca2ab346f191bf745cec092John McCall // We have to ask the ABI about member pointers. 6573e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson if (const MemberPointerType *MPT = T->getAs<MemberPointerType>()) 658f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return getCXXABI().isZeroInitializable(MPT); 6593e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson 660f16aa103d3afd42fbca2ab346f191bf745cec092John McCall // Everything else is okay. 661f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return true; 6623e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson} 663c39211d2aef5b8ca2bc69c9fb81ca3dfb3711eb0Anders Carlsson 664f16aa103d3afd42fbca2ab346f191bf745cec092John McCallbool CodeGenTypes::isZeroInitializable(const CXXRecordDecl *RD) { 6653379e9bd71c0e0051bd97e90d4f2ec964078091dAnders Carlsson return getCGRecordLayout(RD).isZeroInitializable(); 666c39211d2aef5b8ca2bc69c9fb81ca3dfb3711eb0Anders Carlsson} 667