CGCall.cpp revision 6857d9d43b082ae825c29cca80f2f6b7c3aa4e5f
10dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar//===----- CGCall.h - Encapsulate calling convention details ----*- C++ -*-===// 20dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar// 30dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar// The LLVM Compiler Infrastructure 40dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar// 50dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar// This file is distributed under the University of Illinois Open Source 60dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar// License. See LICENSE.TXT for details. 70dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar// 80dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar//===----------------------------------------------------------------------===// 90dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar// 100dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar// These classes wrap the information about a call or function 110dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar// definition used to handle ABI compliancy. 120dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar// 130dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar//===----------------------------------------------------------------------===// 140dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar 150dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar#include "CGCall.h" 160dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar#include "CodeGenFunction.h" 17b768807c49a1c7085def099b848631856af766faDaniel Dunbar#include "CodeGenModule.h" 186b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar#include "clang/Basic/TargetInfo.h" 190dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar#include "clang/AST/ASTContext.h" 200dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar#include "clang/AST/Decl.h" 21f6f8ae561ef78af169cbd2c067cae7ee4b2044e9Anders Carlsson#include "clang/AST/DeclCXX.h" 220dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar#include "clang/AST/DeclObjC.h" 2399037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar#include "clang/AST/RecordLayout.h" 245627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar#include "llvm/ADT/StringExtras.h" 25d0646bd7c11c12b34971b55e5c1bdd8439401b4cDevang Patel#include "llvm/Attributes.h" 26d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar#include "llvm/Support/CallSite.h" 27be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar#include "llvm/Support/MathExtras.h" 2854d1ccbfcf19ddf39444f1b4018dd79487cc847bDaniel Dunbar#include "llvm/Target/TargetData.h" 299eb5c6d3242d85359b2d669564c5e2826efb1931Daniel Dunbar 309eb5c6d3242d85359b2d669564c5e2826efb1931Daniel Dunbar#include "ABIInfo.h" 319eb5c6d3242d85359b2d669564c5e2826efb1931Daniel Dunbar 320dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbarusing namespace clang; 330dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbarusing namespace CodeGen; 340dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar 350dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar/***/ 360dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar 370dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar// FIXME: Use iterator and sidestep silly type array creation. 380dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar 39541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbarconst 4072564e73277e29f6db3305d1f27ba408abb7ed88Douglas GregorCGFunctionInfo &CodeGenTypes::getFunctionInfo(const FunctionNoProtoType *FTNP) { 41541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar return getFunctionInfo(FTNP->getResultType(), 42541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar llvm::SmallVector<QualType, 16>()); 4345c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar} 4445c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar 45541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbarconst 4672564e73277e29f6db3305d1f27ba408abb7ed88Douglas GregorCGFunctionInfo &CodeGenTypes::getFunctionInfo(const FunctionProtoType *FTP) { 47541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar llvm::SmallVector<QualType, 16> ArgTys; 48541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar // FIXME: Kill copy. 4945c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i) 50541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar ArgTys.push_back(FTP->getArgType(i)); 51541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar return getFunctionInfo(FTP->getResultType(), ArgTys); 5245c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar} 5345c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar 54f6f8ae561ef78af169cbd2c067cae7ee4b2044e9Anders Carlssonconst CGFunctionInfo &CodeGenTypes::getFunctionInfo(const CXXMethodDecl *MD) { 55f6f8ae561ef78af169cbd2c067cae7ee4b2044e9Anders Carlsson llvm::SmallVector<QualType, 16> ArgTys; 563eb67ca786ef75bad43d30349c7334b921ba0dbcChris Lattner // Add the 'this' pointer unless this is a static method. 573eb67ca786ef75bad43d30349c7334b921ba0dbcChris Lattner if (MD->isInstance()) 583eb67ca786ef75bad43d30349c7334b921ba0dbcChris Lattner ArgTys.push_back(MD->getThisType(Context)); 59f6f8ae561ef78af169cbd2c067cae7ee4b2044e9Anders Carlsson 60f6f8ae561ef78af169cbd2c067cae7ee4b2044e9Anders Carlsson const FunctionProtoType *FTP = MD->getType()->getAsFunctionProtoType(); 61f6f8ae561ef78af169cbd2c067cae7ee4b2044e9Anders Carlsson for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i) 62f6f8ae561ef78af169cbd2c067cae7ee4b2044e9Anders Carlsson ArgTys.push_back(FTP->getArgType(i)); 63f6f8ae561ef78af169cbd2c067cae7ee4b2044e9Anders Carlsson return getFunctionInfo(FTP->getResultType(), ArgTys); 64f6f8ae561ef78af169cbd2c067cae7ee4b2044e9Anders Carlsson} 65f6f8ae561ef78af169cbd2c067cae7ee4b2044e9Anders Carlsson 66541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbarconst CGFunctionInfo &CodeGenTypes::getFunctionInfo(const FunctionDecl *FD) { 673eb67ca786ef75bad43d30349c7334b921ba0dbcChris Lattner if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) 68f6f8ae561ef78af169cbd2c067cae7ee4b2044e9Anders Carlsson if (MD->isInstance()) 69f6f8ae561ef78af169cbd2c067cae7ee4b2044e9Anders Carlsson return getFunctionInfo(MD); 70f6f8ae561ef78af169cbd2c067cae7ee4b2044e9Anders Carlsson 710dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar const FunctionType *FTy = FD->getType()->getAsFunctionType(); 7272564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor if (const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FTy)) 73541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar return getFunctionInfo(FTP); 7472564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor return getFunctionInfo(cast<FunctionNoProtoType>(FTy)); 750dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar} 760dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar 77541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbarconst CGFunctionInfo &CodeGenTypes::getFunctionInfo(const ObjCMethodDecl *MD) { 78541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar llvm::SmallVector<QualType, 16> ArgTys; 79541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar ArgTys.push_back(MD->getSelfDecl()->getType()); 80541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar ArgTys.push_back(Context.getObjCSelType()); 81541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar // FIXME: Kill copy? 822073216a1075767b5d25c23d1462b7034686d94dChris Lattner for (ObjCMethodDecl::param_iterator i = MD->param_begin(), 830dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar e = MD->param_end(); i != e; ++i) 84541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar ArgTys.push_back((*i)->getType()); 85541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar return getFunctionInfo(MD->getResultType(), ArgTys); 860dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar} 870dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar 88541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbarconst CGFunctionInfo &CodeGenTypes::getFunctionInfo(QualType ResTy, 89541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar const CallArgList &Args) { 90541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar // FIXME: Kill copy. 91541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar llvm::SmallVector<QualType, 16> ArgTys; 92725ad31086e3d6c41afa10c43db44f2e7060a961Daniel Dunbar for (CallArgList::const_iterator i = Args.begin(), e = Args.end(); 93725ad31086e3d6c41afa10c43db44f2e7060a961Daniel Dunbar i != e; ++i) 94541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar ArgTys.push_back(i->second); 95541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar return getFunctionInfo(ResTy, ArgTys); 960dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar} 970dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar 98541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbarconst CGFunctionInfo &CodeGenTypes::getFunctionInfo(QualType ResTy, 99541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar const FunctionArgList &Args) { 100541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar // FIXME: Kill copy. 101541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar llvm::SmallVector<QualType, 16> ArgTys; 102bb36d331f439f49859efcfb4435c61762fbba6f9Daniel Dunbar for (FunctionArgList::const_iterator i = Args.begin(), e = Args.end(); 103bb36d331f439f49859efcfb4435c61762fbba6f9Daniel Dunbar i != e; ++i) 104541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar ArgTys.push_back(i->second); 105541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar return getFunctionInfo(ResTy, ArgTys); 106541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar} 107541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar 108541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbarconst CGFunctionInfo &CodeGenTypes::getFunctionInfo(QualType ResTy, 109541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar const llvm::SmallVector<QualType, 16> &ArgTys) { 11040a6be686e5d5bb4198f1affda574e8a4b3a7710Daniel Dunbar // Lookup or create unique function info. 11140a6be686e5d5bb4198f1affda574e8a4b3a7710Daniel Dunbar llvm::FoldingSetNodeID ID; 11240a6be686e5d5bb4198f1affda574e8a4b3a7710Daniel Dunbar CGFunctionInfo::Profile(ID, ResTy, ArgTys.begin(), ArgTys.end()); 11340a6be686e5d5bb4198f1affda574e8a4b3a7710Daniel Dunbar 11440a6be686e5d5bb4198f1affda574e8a4b3a7710Daniel Dunbar void *InsertPos = 0; 11540a6be686e5d5bb4198f1affda574e8a4b3a7710Daniel Dunbar CGFunctionInfo *FI = FunctionInfos.FindNodeOrInsertPos(ID, InsertPos); 11640a6be686e5d5bb4198f1affda574e8a4b3a7710Daniel Dunbar if (FI) 11740a6be686e5d5bb4198f1affda574e8a4b3a7710Daniel Dunbar return *FI; 11840a6be686e5d5bb4198f1affda574e8a4b3a7710Daniel Dunbar 11988c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar // Construct the function info. 12040a6be686e5d5bb4198f1affda574e8a4b3a7710Daniel Dunbar FI = new CGFunctionInfo(ResTy, ArgTys); 12135e67d4387bbe3e7e17ee6b17eaa42eebb0eb9f1Daniel Dunbar FunctionInfos.InsertNode(FI, InsertPos); 122541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar 12388c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar // Compute ABI information. 1246bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar getABIInfo().computeInfo(*FI, getContext()); 125541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar 12688c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar return *FI; 1270dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar} 12817b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar 12917b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar/***/ 13017b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar 1316b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel DunbarABIInfo::~ABIInfo() {} 1326b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar 1336f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbarvoid ABIArgInfo::dump() const { 1346f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar fprintf(stderr, "(ABIArgInfo Kind="); 1356f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar switch (TheKind) { 1366f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar case Direct: 1376f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar fprintf(stderr, "Direct"); 1386f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar break; 1396f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar case Ignore: 1406f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar fprintf(stderr, "Ignore"); 1416f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar break; 1426f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar case Coerce: 1436f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar fprintf(stderr, "Coerce Type="); 1446f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar getCoerceToType()->print(llvm::errs()); 1456f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar break; 14611e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar case Indirect: 14711e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar fprintf(stderr, "Indirect Align=%d", getIndirectAlign()); 1486f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar break; 1496f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar case Expand: 1506f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar fprintf(stderr, "Expand"); 1516f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar break; 1526f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar } 1536f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar fprintf(stderr, ")\n"); 1546f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar} 1556f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar 1566f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar/***/ 1576f7279bf98e31356306386b2c200820a76b491cfDaniel Dunbar 158573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbarstatic bool isEmptyRecord(ASTContext &Context, QualType T); 159573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar 160573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar/// isEmptyField - Return true iff a the field is "empty", that is it 161573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar/// is an unnamed bit-field or an (array of) empty record(s). 162573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbarstatic bool isEmptyField(ASTContext &Context, const FieldDecl *FD) { 163573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar if (FD->isUnnamedBitfield()) 164573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar return true; 165573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar 166573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar QualType FT = FD->getType(); 167cc401dc651a91f53f9f9a39956732be8f537e7faDaniel Dunbar // Constant arrays of empty records count as empty, strip them off. 168cc401dc651a91f53f9f9a39956732be8f537e7faDaniel Dunbar while (const ConstantArrayType *AT = Context.getAsConstantArrayType(FT)) 169cc401dc651a91f53f9f9a39956732be8f537e7faDaniel Dunbar FT = AT->getElementType(); 170573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar 171573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar return isEmptyRecord(Context, FT); 172573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar} 173573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar 174573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar/// isEmptyRecord - Return true iff a structure contains only empty 175573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar/// fields. Note that a structure with a flexible array member is not 176834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar/// considered empty. 1776ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregorstatic bool isEmptyRecord(ASTContext &Context, QualType T) { 1785bde6f41506535ddaf6e9ff60bd1488db8ded952Daniel Dunbar const RecordType *RT = T->getAsRecordType(); 179834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar if (!RT) 180834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return 0; 181834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar const RecordDecl *RD = RT->getDecl(); 182834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar if (RD->hasFlexibleArrayMember()) 183834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return false; 1846ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor for (RecordDecl::field_iterator i = RD->field_begin(Context), 185573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar e = RD->field_end(Context); i != e; ++i) 186573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar if (!isEmptyField(Context, *i)) 187834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return false; 188834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return true; 189834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar} 190834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar 191834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar/// isSingleElementStruct - Determine if a structure is a "single 192834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar/// element struct", i.e. it has exactly one non-empty field or 193834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar/// exactly one field which is itself a single element 194834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar/// struct. Structures with flexible array members are never 195834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar/// considered single element structs. 196834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar/// 197834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar/// \return The field declaration for the single non-empty field, if 198834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar/// it exists. 199dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbarstatic const Type *isSingleElementStruct(QualType T, ASTContext &Context) { 200834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar const RecordType *RT = T->getAsStructureType(); 201834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar if (!RT) 202834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return 0; 203834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar 204834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar const RecordDecl *RD = RT->getDecl(); 205834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar if (RD->hasFlexibleArrayMember()) 206834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return 0; 207834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar 208dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar const Type *Found = 0; 2096ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor for (RecordDecl::field_iterator i = RD->field_begin(Context), 2106ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor e = RD->field_end(Context); i != e; ++i) { 211834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar const FieldDecl *FD = *i; 212834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar QualType FT = FD->getType(); 213834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar 214573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar // Ignore empty fields. 215573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar if (isEmptyField(Context, FD)) 216573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar continue; 217573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar 218cc401dc651a91f53f9f9a39956732be8f537e7faDaniel Dunbar // If we already found an element then this isn't a single-element 219cc401dc651a91f53f9f9a39956732be8f537e7faDaniel Dunbar // struct. 220fcab2ca966d5176839f8698535e0d807bd968629Daniel Dunbar if (Found) 221834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return 0; 222fcab2ca966d5176839f8698535e0d807bd968629Daniel Dunbar 223cc401dc651a91f53f9f9a39956732be8f537e7faDaniel Dunbar // Treat single element arrays as the element. 224cc401dc651a91f53f9f9a39956732be8f537e7faDaniel Dunbar while (const ConstantArrayType *AT = Context.getAsConstantArrayType(FT)) { 225cc401dc651a91f53f9f9a39956732be8f537e7faDaniel Dunbar if (AT->getSize().getZExtValue() != 1) 226cc401dc651a91f53f9f9a39956732be8f537e7faDaniel Dunbar break; 227cc401dc651a91f53f9f9a39956732be8f537e7faDaniel Dunbar FT = AT->getElementType(); 228cc401dc651a91f53f9f9a39956732be8f537e7faDaniel Dunbar } 229cc401dc651a91f53f9f9a39956732be8f537e7faDaniel Dunbar 230fcab2ca966d5176839f8698535e0d807bd968629Daniel Dunbar if (!CodeGenFunction::hasAggregateLLVMType(FT)) { 231dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar Found = FT.getTypePtr(); 232834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar } else { 233dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar Found = isSingleElementStruct(FT, Context); 234834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar if (!Found) 235834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return 0; 236834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar } 237834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar } 238834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar 239834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return Found; 240834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar} 241834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar 242834af456588587194337bb32671fb9329e73a7f7Daniel Dunbarstatic bool is32Or64BitBasicType(QualType Ty, ASTContext &Context) { 243834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar if (!Ty->getAsBuiltinType() && !Ty->isPointerType()) 244834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return false; 245834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar 246834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar uint64_t Size = Context.getTypeSize(Ty); 247834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return Size == 32 || Size == 64; 248834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar} 249834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar 250834af456588587194337bb32671fb9329e73a7f7Daniel Dunbarstatic bool areAllFields32Or64BitBasicType(const RecordDecl *RD, 251834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar ASTContext &Context) { 2526ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor for (RecordDecl::field_iterator i = RD->field_begin(Context), 2536ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor e = RD->field_end(Context); i != e; ++i) { 254834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar const FieldDecl *FD = *i; 255834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar 256834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar if (!is32Or64BitBasicType(FD->getType(), Context)) 257834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return false; 258834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar 259f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: Reject bit-fields wholesale; there are two problems, we don't know 260f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // how to expand them yet, and the predicate for telling if a bitfield still 261f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // counts as "basic" is more complicated than what we were doing previously. 262e06a75f4c8ea30b6a99d5aa1dce5feda64da09c6Daniel Dunbar if (FD->isBitField()) 263e06a75f4c8ea30b6a99d5aa1dce5feda64da09c6Daniel Dunbar return false; 264834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar } 265e06a75f4c8ea30b6a99d5aa1dce5feda64da09c6Daniel Dunbar 266834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return true; 267834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar} 268834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar 2696b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbarnamespace { 2706b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar/// DefaultABIInfo - The default implementation for ABI specific 2716b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar/// details. This implementation provides information which results in 2726bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar/// self-consistent and sensible LLVM IR generation, but does not 2736bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar/// conform to any particular ABI. 2746b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbarclass DefaultABIInfo : public ABIInfo { 2756bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar ABIArgInfo classifyReturnType(QualType RetTy, 2766bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar ASTContext &Context) const; 2776bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar 2786bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar ABIArgInfo classifyArgumentType(QualType RetTy, 2796bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar ASTContext &Context) const; 2806bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar 2816bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar virtual void computeInfo(CGFunctionInfo &FI, ASTContext &Context) const { 2826bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar FI.getReturnInfo() = classifyReturnType(FI.getReturnType(), Context); 2836bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar for (CGFunctionInfo::arg_iterator it = FI.arg_begin(), ie = FI.arg_end(); 2846bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar it != ie; ++it) 2856bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar it->info = classifyArgumentType(it->type, Context); 2866bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar } 287b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar 288b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar virtual llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 289b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar CodeGenFunction &CGF) const; 2906b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar}; 2916b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar 2926b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar/// X86_32ABIInfo - The X86-32 ABI information. 2936b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbarclass X86_32ABIInfo : public ABIInfo { 2946ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor ASTContext &Context; 2959fd58e85d59f8244c7ba289ae4f9b4f5e0b4c98fEli Friedman bool IsDarwin; 2969fd58e85d59f8244c7ba289ae4f9b4f5e0b4c98fEli Friedman 297dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar static bool isRegisterSize(unsigned Size) { 298dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar return (Size == 8 || Size == 16 || Size == 32 || Size == 64); 299dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar } 300dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar 301cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar static bool shouldReturnTypeInRegister(QualType Ty, ASTContext &Context); 302cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar 3036b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbarpublic: 3046bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar ABIArgInfo classifyReturnType(QualType RetTy, 3056bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar ASTContext &Context) const; 3066b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar 3076bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar ABIArgInfo classifyArgumentType(QualType RetTy, 3086bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar ASTContext &Context) const; 3096bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar 3106bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar virtual void computeInfo(CGFunctionInfo &FI, ASTContext &Context) const { 3116bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar FI.getReturnInfo() = classifyReturnType(FI.getReturnType(), Context); 3126bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar for (CGFunctionInfo::arg_iterator it = FI.arg_begin(), ie = FI.arg_end(); 3136bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar it != ie; ++it) 3146bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar it->info = classifyArgumentType(it->type, Context); 3156bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar } 316b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar 317b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar virtual llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 318b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar CodeGenFunction &CGF) const; 3199fd58e85d59f8244c7ba289ae4f9b4f5e0b4c98fEli Friedman 3206ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor X86_32ABIInfo(ASTContext &Context, bool d) 3216ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor : ABIInfo(), Context(Context), IsDarwin(d) {} 3226b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar}; 3236b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar} 3246b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar 325cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar 326cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar/// shouldReturnTypeInRegister - Determine if the given type should be 327cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar/// passed in a register (for the Darwin ABI). 328cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbarbool X86_32ABIInfo::shouldReturnTypeInRegister(QualType Ty, 329cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar ASTContext &Context) { 330cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar uint64_t Size = Context.getTypeSize(Ty); 331cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar 332cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar // Type must be register sized. 333cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar if (!isRegisterSize(Size)) 334cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar return false; 335cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar 336cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar if (Ty->isVectorType()) { 337cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar // 64- and 128- bit vectors inside structures are not returned in 338cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar // registers. 339cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar if (Size == 64 || Size == 128) 340cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar return false; 341cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar 342cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar return true; 343cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar } 344cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar 345cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar // If this is a builtin, pointer, or complex type, it is ok. 346cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar if (Ty->getAsBuiltinType() || Ty->isPointerType() || Ty->isAnyComplexType()) 347cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar return true; 348cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar 349cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar // Arrays are treated like records. 350cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar if (const ConstantArrayType *AT = Context.getAsConstantArrayType(Ty)) 351cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar return shouldReturnTypeInRegister(AT->getElementType(), Context); 352cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar 353cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar // Otherwise, it must be a record type. 354cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar const RecordType *RT = Ty->getAsRecordType(); 355cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar if (!RT) return false; 356cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar 357cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar // Structure types are passed in register if all fields would be 358cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar // passed in a register. 3596ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor for (RecordDecl::field_iterator i = RT->getDecl()->field_begin(Context), 3606ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor e = RT->getDecl()->field_end(Context); i != e; ++i) { 361cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar const FieldDecl *FD = *i; 362cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar 363573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar // Empty fields are ignored. 364573b907e8ba3b74fc69cddaf63496c7bb5994196Daniel Dunbar if (isEmptyField(Context, FD)) 365cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar continue; 366cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar 367cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar // Check fields recursively. 368cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar if (!shouldReturnTypeInRegister(FD->getType(), Context)) 369cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar return false; 370cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar } 371cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar 372cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar return true; 373cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar} 374cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar 3756b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel DunbarABIArgInfo X86_32ABIInfo::classifyReturnType(QualType RetTy, 3766b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar ASTContext &Context) const { 3770bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar if (RetTy->isVoidType()) { 3780bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar return ABIArgInfo::getIgnore(); 379360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar } else if (const VectorType *VT = RetTy->getAsVectorType()) { 380360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar // On Darwin, some vectors are returned in registers. 381360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar if (IsDarwin) { 382360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar uint64_t Size = Context.getTypeSize(RetTy); 383360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar 384360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar // 128-bit vectors are a special case; they are returned in 385360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar // registers and we need to make sure to pick a type the LLVM 386360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar // backend will like. 387360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar if (Size == 128) 388360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar return ABIArgInfo::getCoerce(llvm::VectorType::get(llvm::Type::Int64Ty, 389360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar 2)); 390360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar 391360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar // Always return in register if it fits in a general purpose 392360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar // register, or if it is 64 bits and has a single element. 393360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar if ((Size == 8 || Size == 16 || Size == 32) || 394360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar (Size == 64 && VT->getNumElements() == 1)) 395360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar return ABIArgInfo::getCoerce(llvm::IntegerType::get(Size)); 396360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar 397360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar return ABIArgInfo::getIndirect(0); 398360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar } 399360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar 400360431660b2245a109f5c6870729126dbcdea254Daniel Dunbar return ABIArgInfo::getDirect(); 4010bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar } else if (CodeGenFunction::hasAggregateLLVMType(RetTy)) { 4028e03444e924665d4d90f5cfc0624c815256e0309Daniel Dunbar // Structures with flexible arrays are always indirect. 4038e03444e924665d4d90f5cfc0624c815256e0309Daniel Dunbar if (const RecordType *RT = RetTy->getAsStructureType()) 4048e03444e924665d4d90f5cfc0624c815256e0309Daniel Dunbar if (RT->getDecl()->hasFlexibleArrayMember()) 4058e03444e924665d4d90f5cfc0624c815256e0309Daniel Dunbar return ABIArgInfo::getIndirect(0); 4068e03444e924665d4d90f5cfc0624c815256e0309Daniel Dunbar 4079fd58e85d59f8244c7ba289ae4f9b4f5e0b4c98fEli Friedman // Outside of Darwin, structs and unions are always indirect. 4089fd58e85d59f8244c7ba289ae4f9b4f5e0b4c98fEli Friedman if (!IsDarwin && !RetTy->isAnyComplexType()) 4099fd58e85d59f8244c7ba289ae4f9b4f5e0b4c98fEli Friedman return ABIArgInfo::getIndirect(0); 4108e03444e924665d4d90f5cfc0624c815256e0309Daniel Dunbar 411834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar // Classify "single element" structs as their element type. 412dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar if (const Type *SeltTy = isSingleElementStruct(RetTy, Context)) { 413834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar if (const BuiltinType *BT = SeltTy->getAsBuiltinType()) { 414834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar if (BT->isIntegerType()) { 4152e0011650fe149bf55916c6f25558bf9bfebf537Daniel Dunbar // We need to use the size of the structure, padding 4162e0011650fe149bf55916c6f25558bf9bfebf537Daniel Dunbar // bit-fields can adjust that to be larger than the single 4172e0011650fe149bf55916c6f25558bf9bfebf537Daniel Dunbar // element type. 4182e0011650fe149bf55916c6f25558bf9bfebf537Daniel Dunbar uint64_t Size = Context.getTypeSize(RetTy); 419834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return ABIArgInfo::getCoerce(llvm::IntegerType::get((unsigned) Size)); 420834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar } else if (BT->getKind() == BuiltinType::Float) { 4212e0011650fe149bf55916c6f25558bf9bfebf537Daniel Dunbar assert(Context.getTypeSize(RetTy) == Context.getTypeSize(SeltTy) && 4222e0011650fe149bf55916c6f25558bf9bfebf537Daniel Dunbar "Unexpect single element structure size!"); 423834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return ABIArgInfo::getCoerce(llvm::Type::FloatTy); 424834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar } else if (BT->getKind() == BuiltinType::Double) { 4252e0011650fe149bf55916c6f25558bf9bfebf537Daniel Dunbar assert(Context.getTypeSize(RetTy) == Context.getTypeSize(SeltTy) && 4262e0011650fe149bf55916c6f25558bf9bfebf537Daniel Dunbar "Unexpect single element structure size!"); 427834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return ABIArgInfo::getCoerce(llvm::Type::DoubleTy); 428834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar } 429834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar } else if (SeltTy->isPointerType()) { 430f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: It would be really nice if this could come out as the proper 431f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // pointer type. 432834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar llvm::Type *PtrTy = 433834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 434834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return ABIArgInfo::getCoerce(PtrTy); 435dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar } else if (SeltTy->isVectorType()) { 436dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar // 64- and 128-bit vectors are never returned in a 437dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar // register when inside a structure. 438dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar uint64_t Size = Context.getTypeSize(RetTy); 439dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar if (Size == 64 || Size == 128) 440dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar return ABIArgInfo::getIndirect(0); 441dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar 442dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar return classifyReturnType(QualType(SeltTy, 0), Context); 443834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar } 444834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar } 445834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar 446836a0641ba4109b2c1254eec247ba4d2731bc2b7Daniel Dunbar // Small structures which are register sized are generally returned 447836a0641ba4109b2c1254eec247ba4d2731bc2b7Daniel Dunbar // in a register. 448836a0641ba4109b2c1254eec247ba4d2731bc2b7Daniel Dunbar if (X86_32ABIInfo::shouldReturnTypeInRegister(RetTy, Context)) { 449836a0641ba4109b2c1254eec247ba4d2731bc2b7Daniel Dunbar uint64_t Size = Context.getTypeSize(RetTy); 450836a0641ba4109b2c1254eec247ba4d2731bc2b7Daniel Dunbar return ABIArgInfo::getCoerce(llvm::IntegerType::get(Size)); 451cf6bde343ff5653744ca782e04d5a9c54b260042Daniel Dunbar } 452dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar 453dfc6b80ee13a9102cd67e0b2398fa999eebcbf8eDaniel Dunbar return ABIArgInfo::getIndirect(0); 4542c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar } else { 4550bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar return ABIArgInfo::getDirect(); 4562c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar } 4572c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar} 4582c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar 4596b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel DunbarABIArgInfo X86_32ABIInfo::classifyArgumentType(QualType Ty, 460b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar ASTContext &Context) const { 46111e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar // FIXME: Set alignment on indirect arguments. 462f035738e346da0a82538ab236aef218a27373635Daniel Dunbar if (CodeGenFunction::hasAggregateLLVMType(Ty)) { 46311e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar // Structures with flexible arrays are always indirect. 464834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar if (const RecordType *RT = Ty->getAsStructureType()) 465834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar if (RT->getDecl()->hasFlexibleArrayMember()) 46611e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar return ABIArgInfo::getIndirect(0); 467834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar 4683170c93d26bdc8b360c4ea3b1cedba50bbd818c1Daniel Dunbar // Ignore empty structs. 469834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar uint64_t Size = Context.getTypeSize(Ty); 470834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar if (Ty->isStructureType() && Size == 0) 4713170c93d26bdc8b360c4ea3b1cedba50bbd818c1Daniel Dunbar return ABIArgInfo::getIgnore(); 472834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar 473834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar // Expand structs with size <= 128-bits which consist only of 474834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar // basic types (int, long long, float, double, xxx*). This is 475834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar // non-recursive and does not ignore empty fields. 476834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar if (const RecordType *RT = Ty->getAsStructureType()) { 477834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar if (Context.getTypeSize(Ty) <= 4*32 && 478834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar areAllFields32Or64BitBasicType(RT->getDecl(), Context)) 479834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar return ABIArgInfo::getExpand(); 480834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar } 481834af456588587194337bb32671fb9329e73a7f7Daniel Dunbar 48211e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar return ABIArgInfo::getIndirect(0); 4838951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar } else { 4840bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar return ABIArgInfo::getDirect(); 4858951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar } 4868951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar} 4878951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar 488b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbarllvm::Value *X86_32ABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 489b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar CodeGenFunction &CGF) const { 490b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar const llvm::Type *BP = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 491b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar const llvm::Type *BPP = llvm::PointerType::getUnqual(BP); 492b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar 493b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar CGBuilderTy &Builder = CGF.Builder; 494b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar llvm::Value *VAListAddrAsBPP = Builder.CreateBitCast(VAListAddr, BPP, 495b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar "ap"); 496b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar llvm::Value *Addr = Builder.CreateLoad(VAListAddrAsBPP, "ap.cur"); 497b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar llvm::Type *PTy = 498b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar llvm::PointerType::getUnqual(CGF.ConvertType(Ty)); 499b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar llvm::Value *AddrTyped = Builder.CreateBitCast(Addr, PTy); 500b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar 501570f0cf734f321b902eb18dd1b07f53543f0a393Daniel Dunbar uint64_t Offset = 502570f0cf734f321b902eb18dd1b07f53543f0a393Daniel Dunbar llvm::RoundUpToAlignment(CGF.getContext().getTypeSize(Ty) / 8, 4); 503b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar llvm::Value *NextAddr = 504b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar Builder.CreateGEP(Addr, 505570f0cf734f321b902eb18dd1b07f53543f0a393Daniel Dunbar llvm::ConstantInt::get(llvm::Type::Int32Ty, Offset), 506b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar "ap.next"); 507b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar Builder.CreateStore(NextAddr, VAListAddrAsBPP); 508b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar 509b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar return AddrTyped; 510b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar} 511b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar 5126f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbarnamespace { 513c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar/// X86_64ABIInfo - The X86_64 ABI information. 5146f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbarclass X86_64ABIInfo : public ABIInfo { 5156f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar enum Class { 5166f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar Integer = 0, 5176f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar SSE, 5186f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar SSEUp, 5196f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar X87, 5206f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar X87Up, 5216f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar ComplexX87, 5226f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar NoClass, 5236f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar Memory 5246f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar }; 5256f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 5268562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar /// merge - Implement the X86_64 ABI merging algorithm. 5278562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar /// 528c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar /// Merge an accumulating classification \arg Accum with a field 529c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar /// classification \arg Field. 530c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar /// 531c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar /// \param Accum - The accumulating classification. This should 532c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar /// always be either NoClass or the result of a previous merge 533c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar /// call. In addition, this should never be Memory (the caller 534c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar /// should just return Memory for the aggregate). 535c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Class merge(Class Accum, Class Field) const; 5368562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar 5376f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar /// classify - Determine the x86_64 register classes in which the 5386f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar /// given type T should be passed. 5396f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar /// 540c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar /// \param Lo - The classification for the parts of the type 541c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar /// residing in the low word of the containing object. 542c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar /// 543c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar /// \param Hi - The classification for the parts of the type 544c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar /// residing in the high word of the containing object. 545c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar /// 546c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar /// \param OffsetBase - The bit offset of this type in the 547cdf920ed6c610e21fc899ada93370a68c900d180Daniel Dunbar /// containing object. Some parameters are classified different 548cdf920ed6c610e21fc899ada93370a68c900d180Daniel Dunbar /// depending on whether they straddle an eightbyte boundary. 5496f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar /// 5506f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar /// If a word is unused its result will be NoClass; if a type should 5516f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar /// be passed in Memory then at least the classification of \arg Lo 5526f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar /// will be Memory. 5536f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar /// 5546f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar /// The \arg Lo class will be NoClass iff the argument is ignored. 5556f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar /// 5566f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar /// If the \arg Lo class is ComplexX87, then the \arg Hi class will 5576e53e9b8795022ed08d5e59b8d78b2c616c2ef9aDaniel Dunbar /// also be ComplexX87. 558e620ecdd4104285e09fe585e90f720459b80259bDaniel Dunbar void classify(QualType T, ASTContext &Context, uint64_t OffsetBase, 5596f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar Class &Lo, Class &Hi) const; 560c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar 561644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar /// getCoerceResult - Given a source type \arg Ty and an LLVM type 562644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar /// to coerce to, chose the best way to pass Ty in the same place 563644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar /// that \arg CoerceTo would be passed, but while keeping the 564644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar /// emitted code as simple as possible. 565644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar /// 566f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump /// FIXME: Note, this should be cleaned up to just take an enumeration of all 567f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump /// the ways we might want to pass things, instead of constructing an LLVM 568f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump /// type. This makes this code more explicit, and it makes it clearer that we 569f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump /// are also doing this for correctness in the case of passing scalar types. 570644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar ABIArgInfo getCoerceResult(QualType Ty, 571644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar const llvm::Type *CoerceTo, 572644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar ASTContext &Context) const; 573644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar 5746bad2658b48264629db595f944a3fbe07f61b4e9Daniel Dunbar ABIArgInfo classifyReturnType(QualType RetTy, 57559e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar ASTContext &Context) const; 57659e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar 57759e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar ABIArgInfo classifyArgumentType(QualType Ty, 57859e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar ASTContext &Context, 5793b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar unsigned &neededInt, 5803b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar unsigned &neededSSE) const; 58159e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar 58259e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbarpublic: 58359e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar virtual void computeInfo(CGFunctionInfo &FI, ASTContext &Context) const; 584b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar 585b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar virtual llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 586b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar CodeGenFunction &CGF) const; 5876f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar}; 5886f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar} 5896f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 590c450357c436c05aa02ef88d406de962d98ac50beDaniel DunbarX86_64ABIInfo::Class X86_64ABIInfo::merge(Class Accum, 591c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Class Field) const { 5928562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // AMD64-ABI 3.2.3p2: Rule 4. Each field of an object is 5938562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // classified recursively so that always two fields are 5948562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // considered. The resulting class is calculated according to 5958562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // the classes of the fields in the eightbyte: 5968562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // 5978562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // (a) If both classes are equal, this is the resulting class. 5988562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // 5998562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // (b) If one of the classes is NO_CLASS, the resulting class is 6008562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // the other class. 6018562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // 6028562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // (c) If one of the classes is MEMORY, the result is the MEMORY 6038562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // class. 6048562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // 6058562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // (d) If one of the classes is INTEGER, the result is the 6068562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // INTEGER. 6078562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // 6088562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // (e) If one of the classes is X87, X87UP, COMPLEX_X87 class, 6098562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // MEMORY is used as class. 6108562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // 6118562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // (f) Otherwise class SSE is used. 612100f402451da96f74ea58b1f49fc53b4fa149a57Daniel Dunbar 613100f402451da96f74ea58b1f49fc53b4fa149a57Daniel Dunbar // Accum should never be memory (we should have returned) or 614100f402451da96f74ea58b1f49fc53b4fa149a57Daniel Dunbar // ComplexX87 (because this cannot be passed in a structure). 615100f402451da96f74ea58b1f49fc53b4fa149a57Daniel Dunbar assert((Accum != Memory && Accum != ComplexX87) && 616c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar "Invalid accumulated classification during merge."); 617c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar if (Accum == Field || Field == NoClass) 618c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar return Accum; 619c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar else if (Field == Memory) 620c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar return Memory; 621c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar else if (Accum == NoClass) 622c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar return Field; 623c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar else if (Accum == Integer || Field == Integer) 624c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar return Integer; 62520e95c5eb400c864bbd4421624fdf7b25ce70f56Daniel Dunbar else if (Field == X87 || Field == X87Up || Field == ComplexX87 || 62620e95c5eb400c864bbd4421624fdf7b25ce70f56Daniel Dunbar Accum == X87 || Accum == X87Up) 627c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar return Memory; 6288562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar else 629c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar return SSE; 6308562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar} 6318562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar 6326f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbarvoid X86_64ABIInfo::classify(QualType Ty, 6336f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar ASTContext &Context, 634e620ecdd4104285e09fe585e90f720459b80259bDaniel Dunbar uint64_t OffsetBase, 6356f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar Class &Lo, Class &Hi) const { 636f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code can be simplified by introducing a simple value class for 637f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Class pairs with appropriate constructor methods for the various 638f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // situations. 6399a82b52ae83fa1c09266b2fa5f0375392f7d127fDaniel Dunbar 640f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: Some of the split computations are wrong; unaligned vectors 641f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // shouldn't be passed in registers for example, so there is no chance they 642f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // can straddle an eightbyte. Verify & simplify. 643e28099bf301ad8b0b77cb11f94caad3c38d97ddaDaniel Dunbar 644c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Lo = Hi = NoClass; 645c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar 646c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Class &Current = OffsetBase < 64 ? Lo : Hi; 647c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Current = Memory; 648c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar 6496f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar if (const BuiltinType *BT = Ty->getAsBuiltinType()) { 6506f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar BuiltinType::Kind k = BT->getKind(); 6516f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 65211434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar if (k == BuiltinType::Void) { 653c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Current = NoClass; 6542df9ced9fd1e8c7d7b38443db07e0e811de22571Chris Lattner } else if (k == BuiltinType::Int128 || k == BuiltinType::UInt128) { 655ae69e005a9072a30262dfe87360b034d4b8e45f2Chris Lattner Lo = Integer; 656ae69e005a9072a30262dfe87360b034d4b8e45f2Chris Lattner Hi = Integer; 65711434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar } else if (k >= BuiltinType::Bool && k <= BuiltinType::LongLong) { 658c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Current = Integer; 6596f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar } else if (k == BuiltinType::Float || k == BuiltinType::Double) { 660c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Current = SSE; 6616f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar } else if (k == BuiltinType::LongDouble) { 6626f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar Lo = X87; 6636f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar Hi = X87Up; 6646f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar } 6657a6605d8be0fc30f1846657ee8133387b1b85296Daniel Dunbar // FIXME: _Decimal32 and _Decimal64 are SSE. 6667a6605d8be0fc30f1846657ee8133387b1b85296Daniel Dunbar // FIXME: _float128 and _Decimal128 are (SSE, SSEUp). 667708762b66a813543078a6d1c4fc2b69ee4361ec7Anders Carlsson } else if (const EnumType *ET = Ty->getAsEnumType()) { 668708762b66a813543078a6d1c4fc2b69ee4361ec7Anders Carlsson // Classify the underlying integer type. 669708762b66a813543078a6d1c4fc2b69ee4361ec7Anders Carlsson classify(ET->getDecl()->getIntegerType(), Context, OffsetBase, Lo, Hi); 6708958891f5fa1e593c4519a36b3df427ee019d70bDaniel Dunbar } else if (Ty->hasPointerRepresentation()) { 671c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Current = Integer; 6727a6605d8be0fc30f1846657ee8133387b1b85296Daniel Dunbar } else if (const VectorType *VT = Ty->getAsVectorType()) { 673e620ecdd4104285e09fe585e90f720459b80259bDaniel Dunbar uint64_t Size = Context.getTypeSize(VT); 674e28099bf301ad8b0b77cb11f94caad3c38d97ddaDaniel Dunbar if (Size == 32) { 675e28099bf301ad8b0b77cb11f94caad3c38d97ddaDaniel Dunbar // gcc passes all <4 x char>, <2 x short>, <1 x int>, <1 x 676e28099bf301ad8b0b77cb11f94caad3c38d97ddaDaniel Dunbar // float> as integer. 677e28099bf301ad8b0b77cb11f94caad3c38d97ddaDaniel Dunbar Current = Integer; 678e28099bf301ad8b0b77cb11f94caad3c38d97ddaDaniel Dunbar 679e28099bf301ad8b0b77cb11f94caad3c38d97ddaDaniel Dunbar // If this type crosses an eightbyte boundary, it should be 680e28099bf301ad8b0b77cb11f94caad3c38d97ddaDaniel Dunbar // split. 681e28099bf301ad8b0b77cb11f94caad3c38d97ddaDaniel Dunbar uint64_t EB_Real = (OffsetBase) / 64; 682e28099bf301ad8b0b77cb11f94caad3c38d97ddaDaniel Dunbar uint64_t EB_Imag = (OffsetBase + Size - 1) / 64; 683e28099bf301ad8b0b77cb11f94caad3c38d97ddaDaniel Dunbar if (EB_Real != EB_Imag) 684e28099bf301ad8b0b77cb11f94caad3c38d97ddaDaniel Dunbar Hi = Lo; 685e28099bf301ad8b0b77cb11f94caad3c38d97ddaDaniel Dunbar } else if (Size == 64) { 6860af9929e1ba8e5b9ae0a8999439736d249599bbeDaniel Dunbar // gcc passes <1 x double> in memory. :( 6870af9929e1ba8e5b9ae0a8999439736d249599bbeDaniel Dunbar if (VT->getElementType()->isSpecificBuiltinType(BuiltinType::Double)) 688d4cd1b07169c698bd003be102bd73a7da7e24b25Daniel Dunbar return; 6890af9929e1ba8e5b9ae0a8999439736d249599bbeDaniel Dunbar 6900af9929e1ba8e5b9ae0a8999439736d249599bbeDaniel Dunbar // gcc passes <1 x long long> as INTEGER. 6910af9929e1ba8e5b9ae0a8999439736d249599bbeDaniel Dunbar if (VT->getElementType()->isSpecificBuiltinType(BuiltinType::LongLong)) 6920af9929e1ba8e5b9ae0a8999439736d249599bbeDaniel Dunbar Current = Integer; 6930af9929e1ba8e5b9ae0a8999439736d249599bbeDaniel Dunbar else 6940af9929e1ba8e5b9ae0a8999439736d249599bbeDaniel Dunbar Current = SSE; 695e33edf150adc44a34c5f6c8ed6109f6dcd2f70c6Daniel Dunbar 696e33edf150adc44a34c5f6c8ed6109f6dcd2f70c6Daniel Dunbar // If this type crosses an eightbyte boundary, it should be 697e33edf150adc44a34c5f6c8ed6109f6dcd2f70c6Daniel Dunbar // split. 698cdf920ed6c610e21fc899ada93370a68c900d180Daniel Dunbar if (OffsetBase && OffsetBase != 64) 699e33edf150adc44a34c5f6c8ed6109f6dcd2f70c6Daniel Dunbar Hi = Lo; 7007a6605d8be0fc30f1846657ee8133387b1b85296Daniel Dunbar } else if (Size == 128) { 7017a6605d8be0fc30f1846657ee8133387b1b85296Daniel Dunbar Lo = SSE; 7027a6605d8be0fc30f1846657ee8133387b1b85296Daniel Dunbar Hi = SSEUp; 7037a6605d8be0fc30f1846657ee8133387b1b85296Daniel Dunbar } 7046f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar } else if (const ComplexType *CT = Ty->getAsComplexType()) { 7053327f6ead9362e5689674a4aaab5b7f23ea0dea3Daniel Dunbar QualType ET = Context.getCanonicalType(CT->getElementType()); 7066f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 707e33edf150adc44a34c5f6c8ed6109f6dcd2f70c6Daniel Dunbar uint64_t Size = Context.getTypeSize(Ty); 7080af9929e1ba8e5b9ae0a8999439736d249599bbeDaniel Dunbar if (ET->isIntegralType()) { 709eac48dc189154eea5067310c5dd257dfe07c29aaDaniel Dunbar if (Size <= 64) 710c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Current = Integer; 711eac48dc189154eea5067310c5dd257dfe07c29aaDaniel Dunbar else if (Size <= 128) 712eac48dc189154eea5067310c5dd257dfe07c29aaDaniel Dunbar Lo = Hi = Integer; 713eac48dc189154eea5067310c5dd257dfe07c29aaDaniel Dunbar } else if (ET == Context.FloatTy) 714c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Current = SSE; 7156f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar else if (ET == Context.DoubleTy) 7166f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar Lo = Hi = SSE; 7176f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar else if (ET == Context.LongDoubleTy) 718c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Current = ComplexX87; 719f04d69bbb25eb681fff1a108f13f67c6ca70cf6aDaniel Dunbar 720f04d69bbb25eb681fff1a108f13f67c6ca70cf6aDaniel Dunbar // If this complex type crosses an eightbyte boundary then it 721f04d69bbb25eb681fff1a108f13f67c6ca70cf6aDaniel Dunbar // should be split. 722cdf920ed6c610e21fc899ada93370a68c900d180Daniel Dunbar uint64_t EB_Real = (OffsetBase) / 64; 723cdf920ed6c610e21fc899ada93370a68c900d180Daniel Dunbar uint64_t EB_Imag = (OffsetBase + Context.getTypeSize(ET)) / 64; 724f04d69bbb25eb681fff1a108f13f67c6ca70cf6aDaniel Dunbar if (Hi == NoClass && EB_Real != EB_Imag) 725f04d69bbb25eb681fff1a108f13f67c6ca70cf6aDaniel Dunbar Hi = Lo; 7268562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar } else if (const ConstantArrayType *AT = Context.getAsConstantArrayType(Ty)) { 7278562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // Arrays are treated like structures. 7288562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar 7298562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar uint64_t Size = Context.getTypeSize(Ty); 7308562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar 7318562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // AMD64-ABI 3.2.3p2: Rule 1. If the size of an object is larger 7328562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // than two eightbytes, ..., it has class MEMORY. 7338562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar if (Size > 128) 7348562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar return; 7358562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar 7368562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // AMD64-ABI 3.2.3p2: Rule 1. If ..., or it contains unaligned 7378562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // fields, it has class MEMORY. 7388562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // 7398562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // Only need to check alignment of array base. 740c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar if (OffsetBase % Context.getTypeAlign(AT->getElementType())) 7418562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar return; 7428562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar 7438562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // Otherwise implement simplified merge. We could be smarter about 7448562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // this, but it isn't worth it and would be harder to verify. 745c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Current = NoClass; 7468562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar uint64_t EltSize = Context.getTypeSize(AT->getElementType()); 7478562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar uint64_t ArraySize = AT->getSize().getZExtValue(); 7488562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar for (uint64_t i=0, Offset=OffsetBase; i<ArraySize; ++i, Offset += EltSize) { 7498562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar Class FieldLo, FieldHi; 7508562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar classify(AT->getElementType(), Context, Offset, FieldLo, FieldHi); 751c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Lo = merge(Lo, FieldLo); 752c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Hi = merge(Hi, FieldHi); 753c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar if (Lo == Memory || Hi == Memory) 754c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar break; 7558562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar } 756c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar 757c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar // Do post merger cleanup (see below). Only case we worry about is Memory. 758c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar if (Hi == Memory) 759c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Lo = Memory; 760c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar assert((Hi != SSEUp || Lo == SSE) && "Invalid SSEUp array classification."); 76199037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar } else if (const RecordType *RT = Ty->getAsRecordType()) { 762e620ecdd4104285e09fe585e90f720459b80259bDaniel Dunbar uint64_t Size = Context.getTypeSize(Ty); 76399037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar 76499037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar // AMD64-ABI 3.2.3p2: Rule 1. If the size of an object is larger 76599037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar // than two eightbytes, ..., it has class MEMORY. 76699037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar if (Size > 128) 76799037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar return; 76899037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar 76999037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar const RecordDecl *RD = RT->getDecl(); 77099037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar 77199037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar // Assume variable sized types are passed in memory. 77299037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar if (RD->hasFlexibleArrayMember()) 77399037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar return; 77499037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar 77599037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar const ASTRecordLayout &Layout = Context.getASTRecordLayout(RD); 77699037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar 77799037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar // Reset Lo class, this will be recomputed. 778c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Current = NoClass; 77999037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar unsigned idx = 0; 7806ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor for (RecordDecl::field_iterator i = RD->field_begin(Context), 7816ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor e = RD->field_end(Context); i != e; ++i, ++idx) { 7828562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar uint64_t Offset = OffsetBase + Layout.getFieldOffset(idx); 783dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar bool BitField = i->isBitField(); 78499037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar 7858562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // AMD64-ABI 3.2.3p2: Rule 1. If ..., or it contains unaligned 7868562ae74ae0ff0a64b46ef5ebea8e7ce0f76fa00Daniel Dunbar // fields, it has class MEMORY. 787dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar // 7888e03444e924665d4d90f5cfc0624c815256e0309Daniel Dunbar // Note, skip this test for bit-fields, see below. 789dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar if (!BitField && Offset % Context.getTypeAlign(i->getType())) { 79099037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar Lo = Memory; 79199037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar return; 79299037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar } 79399037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar 79499037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar // Classify this field. 795c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar // 796c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar // AMD64-ABI 3.2.3p2: Rule 3. If the size of the aggregate 797c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar // exceeds a single eightbyte, each is classified 798c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar // separately. Each eightbyte gets initialized to class 799c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar // NO_CLASS. 80099037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar Class FieldLo, FieldHi; 801dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar 8028e03444e924665d4d90f5cfc0624c815256e0309Daniel Dunbar // Bit-fields require special handling, they do not force the 803dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar // structure to be passed in memory even if unaligned, and 804dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar // therefore they can straddle an eightbyte. 805dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar if (BitField) { 8068236bf1800641d1c296579e25218f68f74c5caacDaniel Dunbar // Ignore padding bit-fields. 8078236bf1800641d1c296579e25218f68f74c5caacDaniel Dunbar if (i->isUnnamedBitfield()) 8088236bf1800641d1c296579e25218f68f74c5caacDaniel Dunbar continue; 8098236bf1800641d1c296579e25218f68f74c5caacDaniel Dunbar 810dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar uint64_t Offset = OffsetBase + Layout.getFieldOffset(idx); 8119a901bb63990574ff0bcc12ff851d7a71cff8ddbEli Friedman uint64_t Size = i->getBitWidth()->EvaluateAsInt(Context).getZExtValue(); 812dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar 813dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar uint64_t EB_Lo = Offset / 64; 814dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar uint64_t EB_Hi = (Offset + Size - 1) / 64; 815dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar FieldLo = FieldHi = NoClass; 816dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar if (EB_Lo) { 817dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar assert(EB_Hi == EB_Lo && "Invalid classification, type > 16 bytes."); 818dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar FieldLo = NoClass; 819dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar FieldHi = Integer; 820dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar } else { 821dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar FieldLo = Integer; 822dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar FieldHi = EB_Hi ? Integer : NoClass; 823dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar } 824dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar } else 825dd81d44fac2631e6ca9fe1f52366aea0f51b03e1Daniel Dunbar classify(i->getType(), Context, Offset, FieldLo, FieldHi); 826c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Lo = merge(Lo, FieldLo); 827c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Hi = merge(Hi, FieldHi); 828c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar if (Lo == Memory || Hi == Memory) 829c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar break; 83099037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar } 83199037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar 83299037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar // AMD64-ABI 3.2.3p2: Rule 5. Then a post merger cleanup is done: 83399037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar // 83499037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar // (a) If one of the classes is MEMORY, the whole argument is 83599037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar // passed in memory. 83699037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar // 83799037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar // (b) If SSEUP is not preceeded by SSE, it is converted to SSE. 83899037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar 83999037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar // The first of these conditions is guaranteed by how we implement 840c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar // the merge (just bail). 841c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar // 842c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar // The second condition occurs in the case of unions; for example 843c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar // union { _Complex double; unsigned; }. 844c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar if (Hi == Memory) 845c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Lo = Memory; 84699037e5a2118bc194251a8033a0885810bf61c95Daniel Dunbar if (Hi == SSEUp && Lo != SSE) 847c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar Hi = SSE; 8486f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar } 8496f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar} 8506f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 851644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel DunbarABIArgInfo X86_64ABIInfo::getCoerceResult(QualType Ty, 852644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar const llvm::Type *CoerceTo, 853644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar ASTContext &Context) const { 854644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar if (CoerceTo == llvm::Type::Int64Ty) { 855644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar // Integer and pointer types will end up in a general purpose 856644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar // register. 8570af9929e1ba8e5b9ae0a8999439736d249599bbeDaniel Dunbar if (Ty->isIntegralType() || Ty->isPointerType()) 858644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar return ABIArgInfo::getDirect(); 8590af9929e1ba8e5b9ae0a8999439736d249599bbeDaniel Dunbar 860644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar } else if (CoerceTo == llvm::Type::DoubleTy) { 861f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: It would probably be better to make CGFunctionInfo only map using 862f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // canonical types than to canonize here. 8633327f6ead9362e5689674a4aaab5b7f23ea0dea3Daniel Dunbar QualType CTy = Context.getCanonicalType(Ty); 8643327f6ead9362e5689674a4aaab5b7f23ea0dea3Daniel Dunbar 865644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar // Float and double end up in a single SSE reg. 8663327f6ead9362e5689674a4aaab5b7f23ea0dea3Daniel Dunbar if (CTy == Context.FloatTy || CTy == Context.DoubleTy) 867644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar return ABIArgInfo::getDirect(); 8680af9929e1ba8e5b9ae0a8999439736d249599bbeDaniel Dunbar 869644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar } 870644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar 871644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar return ABIArgInfo::getCoerce(CoerceTo); 872644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar} 873c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar 874d4edfe4746c66d2ac452c8a8d7cac17192283e75Daniel DunbarABIArgInfo X86_64ABIInfo::classifyReturnType(QualType RetTy, 875d4edfe4746c66d2ac452c8a8d7cac17192283e75Daniel Dunbar ASTContext &Context) const { 8766f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar // AMD64-ABI 3.2.3p4: Rule 1. Classify the return type with the 8776f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar // classification algorithm. 8786f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar X86_64ABIInfo::Class Lo, Hi; 879f04d69bbb25eb681fff1a108f13f67c6ca70cf6aDaniel Dunbar classify(RetTy, Context, 0, Lo, Hi); 8806f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 881c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar // Check some invariants. 882c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar assert((Hi != Memory || Lo == Memory) && "Invalid memory classification."); 883c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar assert((Lo != NoClass || Hi == NoClass) && "Invalid null classification."); 884c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar assert((Hi != SSEUp || Lo == SSE) && "Invalid SSEUp classification."); 885c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar 8866f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar const llvm::Type *ResType = 0; 8876f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar switch (Lo) { 8886f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar case NoClass: 88911434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar return ABIArgInfo::getIgnore(); 8906f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 8916f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar case SSEUp: 8926f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar case X87Up: 8936f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar assert(0 && "Invalid classification for lo word."); 8946f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 895c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar // AMD64-ABI 3.2.3p4: Rule 2. Types of class memory are returned via 89611e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar // hidden argument. 8976f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar case Memory: 89811e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar return ABIArgInfo::getIndirect(0); 8996f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 9006f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar // AMD64-ABI 3.2.3p4: Rule 3. If the class is INTEGER, the next 9016f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar // available register of the sequence %rax, %rdx is used. 9026f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar case Integer: 9036f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar ResType = llvm::Type::Int64Ty; break; 9046f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 9056f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar // AMD64-ABI 3.2.3p4: Rule 4. If the class is SSE, the next 9066f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar // available SSE register of the sequence %xmm0, %xmm1 is used. 9076f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar case SSE: 9086f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar ResType = llvm::Type::DoubleTy; break; 9096f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 9106f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar // AMD64-ABI 3.2.3p4: Rule 6. If the class is X87, the value is 9116f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar // returned on the X87 stack in %st0 as 80-bit x87 number. 9126f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar case X87: 9136f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar ResType = llvm::Type::X86_FP80Ty; break; 9146f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 915c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar // AMD64-ABI 3.2.3p4: Rule 8. If the class is COMPLEX_X87, the real 916c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar // part of the value is returned in %st0 and the imaginary part in 917c450357c436c05aa02ef88d406de962d98ac50beDaniel Dunbar // %st1. 9186f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar case ComplexX87: 9196e53e9b8795022ed08d5e59b8d78b2c616c2ef9aDaniel Dunbar assert(Hi == ComplexX87 && "Unexpected ComplexX87 classification."); 9203e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar ResType = llvm::StructType::get(llvm::Type::X86_FP80Ty, 9213e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar llvm::Type::X86_FP80Ty, 9223e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar NULL); 9236f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar break; 9246f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar } 9256f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 9266f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar switch (Hi) { 9276e53e9b8795022ed08d5e59b8d78b2c616c2ef9aDaniel Dunbar // Memory was handled previously and X87 should 9286e53e9b8795022ed08d5e59b8d78b2c616c2ef9aDaniel Dunbar // never occur as a hi class. 9296f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar case Memory: 9306f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar case X87: 9316f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar assert(0 && "Invalid classification for hi word."); 9326f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 9336e53e9b8795022ed08d5e59b8d78b2c616c2ef9aDaniel Dunbar case ComplexX87: // Previously handled. 9346f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar case NoClass: break; 9356e53e9b8795022ed08d5e59b8d78b2c616c2ef9aDaniel Dunbar 9366f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar case Integer: 937b0e14f2a878c1a823341d34ca8f8fe60419fb9efDaniel Dunbar ResType = llvm::StructType::get(ResType, llvm::Type::Int64Ty, NULL); 938b0e14f2a878c1a823341d34ca8f8fe60419fb9efDaniel Dunbar break; 9396f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar case SSE: 940b0e14f2a878c1a823341d34ca8f8fe60419fb9efDaniel Dunbar ResType = llvm::StructType::get(ResType, llvm::Type::DoubleTy, NULL); 941b0e14f2a878c1a823341d34ca8f8fe60419fb9efDaniel Dunbar break; 9426f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 9436f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar // AMD64-ABI 3.2.3p4: Rule 5. If the class is SSEUP, the eightbyte 9446f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar // is passed in the upper half of the last used SSE register. 9456f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar // 9466f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar // SSEUP should always be preceeded by SSE, just widen. 9476f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar case SSEUp: 9486f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar assert(Lo == SSE && "Unexpected SSEUp classification."); 9496f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar ResType = llvm::VectorType::get(llvm::Type::DoubleTy, 2); 9506f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar break; 9516f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 9526f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar // AMD64-ABI 3.2.3p4: Rule 7. If the class is X87UP, the value is 953b0e14f2a878c1a823341d34ca8f8fe60419fb9efDaniel Dunbar // returned together with the previous X87 value in %st0. 9546f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar case X87Up: 955100f402451da96f74ea58b1f49fc53b4fa149a57Daniel Dunbar // If X87Up is preceeded by X87, we don't need to do 956100f402451da96f74ea58b1f49fc53b4fa149a57Daniel Dunbar // anything. However, in some cases with unions it may not be 957100f402451da96f74ea58b1f49fc53b4fa149a57Daniel Dunbar // preceeded by X87. In such situations we follow gcc and pass the 958100f402451da96f74ea58b1f49fc53b4fa149a57Daniel Dunbar // extra bits in an SSE reg. 959100f402451da96f74ea58b1f49fc53b4fa149a57Daniel Dunbar if (Lo != X87) 960100f402451da96f74ea58b1f49fc53b4fa149a57Daniel Dunbar ResType = llvm::StructType::get(ResType, llvm::Type::DoubleTy, NULL); 9616f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar break; 9626f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar } 9636f3e7fac422fb0c50e1579edf49a797797c821ccDaniel Dunbar 964644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar return getCoerceResult(RetTy, ResType, Context); 965d4edfe4746c66d2ac452c8a8d7cac17192283e75Daniel Dunbar} 966d4edfe4746c66d2ac452c8a8d7cac17192283e75Daniel Dunbar 96759e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel DunbarABIArgInfo X86_64ABIInfo::classifyArgumentType(QualType Ty, ASTContext &Context, 9683b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar unsigned &neededInt, 9693b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar unsigned &neededSSE) const { 97059e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar X86_64ABIInfo::Class Lo, Hi; 97159e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar classify(Ty, Context, 0, Lo, Hi); 97259e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar 97359e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // Check some invariants. 97459e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // FIXME: Enforce these by construction. 97559e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar assert((Hi != Memory || Lo == Memory) && "Invalid memory classification."); 97659e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar assert((Lo != NoClass || Hi == NoClass) && "Invalid null classification."); 97759e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar assert((Hi != SSEUp || Lo == SSE) && "Invalid SSEUp classification."); 97859e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar 9793b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar neededInt = 0; 9803b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar neededSSE = 0; 98159e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar const llvm::Type *ResType = 0; 98259e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar switch (Lo) { 98359e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar case NoClass: 98459e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar return ABIArgInfo::getIgnore(); 98559e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar 98659e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // AMD64-ABI 3.2.3p3: Rule 1. If the class is MEMORY, pass the argument 98759e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // on the stack. 98859e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar case Memory: 98959e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar 99059e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // AMD64-ABI 3.2.3p3: Rule 5. If the class is X87, X87UP or 99159e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // COMPLEX_X87, it is passed in memory. 99259e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar case X87: 99359e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar case ComplexX87: 994245f5534a520c23e703fd239632273c551be50b3Daniel Dunbar return ABIArgInfo::getIndirect(0); 99559e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar 99659e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar case SSEUp: 99759e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar case X87Up: 99859e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar assert(0 && "Invalid classification for lo word."); 99959e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar 100059e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // AMD64-ABI 3.2.3p3: Rule 2. If the class is INTEGER, the next 100159e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // available register of the sequence %rdi, %rsi, %rdx, %rcx, %r8 100259e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // and %r9 is used. 100359e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar case Integer: 100459e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar ++neededInt; 100559e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar ResType = llvm::Type::Int64Ty; 100659e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar break; 100759e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar 100859e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // AMD64-ABI 3.2.3p3: Rule 3. If the class is SSE, the next 100959e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // available SSE register is used, the registers are taken in the 101059e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // order from %xmm0 to %xmm7. 101159e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar case SSE: 101259e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar ++neededSSE; 101359e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar ResType = llvm::Type::DoubleTy; 101459e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar break; 101559e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar } 101659e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar 101759e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar switch (Hi) { 101859e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // Memory was handled previously, ComplexX87 and X87 should 101959e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // never occur as hi classes, and X87Up must be preceed by X87, 102059e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // which is passed in memory. 102159e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar case Memory: 102259e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar case X87: 102359e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar case ComplexX87: 102459e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar assert(0 && "Invalid classification for hi word."); 1025100f402451da96f74ea58b1f49fc53b4fa149a57Daniel Dunbar break; 102659e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar 102759e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar case NoClass: break; 102859e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar case Integer: 102959e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar ResType = llvm::StructType::get(ResType, llvm::Type::Int64Ty, NULL); 103059e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar ++neededInt; 103159e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar break; 1032100f402451da96f74ea58b1f49fc53b4fa149a57Daniel Dunbar 1033100f402451da96f74ea58b1f49fc53b4fa149a57Daniel Dunbar // X87Up generally doesn't occur here (long double is passed in 1034100f402451da96f74ea58b1f49fc53b4fa149a57Daniel Dunbar // memory), except in situations involving unions. 1035100f402451da96f74ea58b1f49fc53b4fa149a57Daniel Dunbar case X87Up: 1036100f402451da96f74ea58b1f49fc53b4fa149a57Daniel Dunbar case SSE: 103759e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar ResType = llvm::StructType::get(ResType, llvm::Type::DoubleTy, NULL); 103859e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar ++neededSSE; 103959e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar break; 104059e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar 104159e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // AMD64-ABI 3.2.3p3: Rule 4. If the class is SSEUP, the 104259e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // eightbyte is passed in the upper half of the last used SSE 104359e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // register. 104459e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar case SSEUp: 104559e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar assert(Lo == SSE && "Unexpected SSEUp classification."); 104659e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar ResType = llvm::VectorType::get(llvm::Type::DoubleTy, 2); 104759e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar break; 104859e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar } 104959e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar 1050644f4c3fe4130c7be75d6191340ba8d857ba0730Daniel Dunbar return getCoerceResult(Ty, ResType, Context); 1051d4edfe4746c66d2ac452c8a8d7cac17192283e75Daniel Dunbar} 1052d4edfe4746c66d2ac452c8a8d7cac17192283e75Daniel Dunbar 105359e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbarvoid X86_64ABIInfo::computeInfo(CGFunctionInfo &FI, ASTContext &Context) const { 105459e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar FI.getReturnInfo() = classifyReturnType(FI.getReturnType(), Context); 105559e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar 105659e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // Keep track of the number of assigned registers. 105759e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar unsigned freeIntRegs = 6, freeSSERegs = 8; 105859e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar 105959e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // AMD64-ABI 3.2.3p3: Once arguments are classified, the registers 106059e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // get assigned (in left-to-right order) for passing as follows... 106159e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar for (CGFunctionInfo::arg_iterator it = FI.arg_begin(), ie = FI.arg_end(); 10623b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar it != ie; ++it) { 10633b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar unsigned neededInt, neededSSE; 10643b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar it->info = classifyArgumentType(it->type, Context, neededInt, neededSSE); 10653b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar 10663b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar // AMD64-ABI 3.2.3p3: If there are no registers available for any 10673b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar // eightbyte of an argument, the whole argument is passed on the 10683b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar // stack. If registers have already been assigned for some 10693b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar // eightbytes of such an argument, the assignments get reverted. 10703b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar if (freeIntRegs >= neededInt && freeSSERegs >= neededSSE) { 10713b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar freeIntRegs -= neededInt; 10723b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar freeSSERegs -= neededSSE; 10733b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar } else { 1074245f5534a520c23e703fd239632273c551be50b3Daniel Dunbar it->info = ABIArgInfo::getIndirect(0); 10753b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar } 10763b4e9cd0655467f66332575b816a958d319e8ca6Daniel Dunbar } 107759e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar} 107859e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar 1079be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbarstatic llvm::Value *EmitVAArgFromMemory(llvm::Value *VAListAddr, 1080be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar QualType Ty, 1081be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar CodeGenFunction &CGF) { 1082be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::Value *overflow_arg_area_p = 1083be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar CGF.Builder.CreateStructGEP(VAListAddr, 2, "overflow_arg_area_p"); 1084be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::Value *overflow_arg_area = 1085be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar CGF.Builder.CreateLoad(overflow_arg_area_p, "overflow_arg_area"); 1086be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1087be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // AMD64-ABI 3.5.7p5: Step 7. Align l->overflow_arg_area upwards to a 16 1088be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // byte boundary if alignment needed by type exceeds 8 byte boundary. 1089c5bcee4dce79458c4f490490c71619e06cbde357Daniel Dunbar uint64_t Align = CGF.getContext().getTypeAlign(Ty) / 8; 1090be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar if (Align > 8) { 1091c5bcee4dce79458c4f490490c71619e06cbde357Daniel Dunbar // Note that we follow the ABI & gcc here, even though the type 1092c5bcee4dce79458c4f490490c71619e06cbde357Daniel Dunbar // could in theory have an alignment greater than 16. This case 1093c5bcee4dce79458c4f490490c71619e06cbde357Daniel Dunbar // shouldn't ever matter in practice. 1094c5bcee4dce79458c4f490490c71619e06cbde357Daniel Dunbar 1095c5bcee4dce79458c4f490490c71619e06cbde357Daniel Dunbar // overflow_arg_area = (overflow_arg_area + 15) & ~15; 1096c5bcee4dce79458c4f490490c71619e06cbde357Daniel Dunbar llvm::Value *Offset = llvm::ConstantInt::get(llvm::Type::Int32Ty, 15); 1097c5bcee4dce79458c4f490490c71619e06cbde357Daniel Dunbar overflow_arg_area = CGF.Builder.CreateGEP(overflow_arg_area, Offset); 1098c5bcee4dce79458c4f490490c71619e06cbde357Daniel Dunbar llvm::Value *AsInt = CGF.Builder.CreatePtrToInt(overflow_arg_area, 1099c5bcee4dce79458c4f490490c71619e06cbde357Daniel Dunbar llvm::Type::Int64Ty); 1100c5bcee4dce79458c4f490490c71619e06cbde357Daniel Dunbar llvm::Value *Mask = llvm::ConstantInt::get(llvm::Type::Int64Ty, ~15LL); 1101c5bcee4dce79458c4f490490c71619e06cbde357Daniel Dunbar overflow_arg_area = 1102c5bcee4dce79458c4f490490c71619e06cbde357Daniel Dunbar CGF.Builder.CreateIntToPtr(CGF.Builder.CreateAnd(AsInt, Mask), 1103c5bcee4dce79458c4f490490c71619e06cbde357Daniel Dunbar overflow_arg_area->getType(), 1104c5bcee4dce79458c4f490490c71619e06cbde357Daniel Dunbar "overflow_arg_area.align"); 1105be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar } 1106be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1107be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // AMD64-ABI 3.5.7p5: Step 8. Fetch type from l->overflow_arg_area. 1108be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar const llvm::Type *LTy = CGF.ConvertTypeForMem(Ty); 1109be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::Value *Res = 1110be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar CGF.Builder.CreateBitCast(overflow_arg_area, 1111be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::PointerType::getUnqual(LTy)); 1112be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1113be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // AMD64-ABI 3.5.7p5: Step 9. Set l->overflow_arg_area to: 1114be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // l->overflow_arg_area + sizeof(type). 1115be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // AMD64-ABI 3.5.7p5: Step 10. Align l->overflow_arg_area upwards to 1116be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // an 8 byte boundary. 1117be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1118be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar uint64_t SizeInBytes = (CGF.getContext().getTypeSize(Ty) + 7) / 8; 1119be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::Value *Offset = llvm::ConstantInt::get(llvm::Type::Int32Ty, 1120be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar (SizeInBytes + 7) & ~7); 1121be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar overflow_arg_area = CGF.Builder.CreateGEP(overflow_arg_area, Offset, 1122be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar "overflow_arg_area.next"); 1123be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar CGF.Builder.CreateStore(overflow_arg_area, overflow_arg_area_p); 1124be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1125be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // AMD64-ABI 3.5.7p5: Step 11. Return the fetched type. 1126be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar return Res; 1127be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar} 1128be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1129b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbarllvm::Value *X86_64ABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 1130b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar CodeGenFunction &CGF) const { 1131be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // Assume that va_list type is correct; should be pointer to LLVM type: 1132be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // struct { 1133be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // i32 gp_offset; 1134be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // i32 fp_offset; 1135be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // i8* overflow_arg_area; 1136be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // i8* reg_save_area; 1137be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // }; 1138be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar unsigned neededInt, neededSSE; 1139be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar ABIArgInfo AI = classifyArgumentType(Ty, CGF.getContext(), 1140be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar neededInt, neededSSE); 1141be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1142be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // AMD64-ABI 3.5.7p5: Step 1. Determine whether type may be passed 1143be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // in the registers. If not go to step 7. 1144be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar if (!neededInt && !neededSSE) 1145be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar return EmitVAArgFromMemory(VAListAddr, Ty, CGF); 1146be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1147be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // AMD64-ABI 3.5.7p5: Step 2. Compute num_gp to hold the number of 1148be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // general purpose registers needed to pass type and num_fp to hold 1149be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // the number of floating point registers needed. 1150be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1151be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // AMD64-ABI 3.5.7p5: Step 3. Verify whether arguments fit into 1152be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // registers. In the case: l->gp_offset > 48 - num_gp * 8 or 1153be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // l->fp_offset > 304 - num_fp * 16 go to step 7. 1154be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // 1155be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // NOTE: 304 is a typo, there are (6 * 8 + 8 * 16) = 176 bytes of 1156be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // register save space). 1157be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1158be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::Value *InRegs = 0; 1159be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::Value *gp_offset_p = 0, *gp_offset = 0; 1160be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::Value *fp_offset_p = 0, *fp_offset = 0; 1161be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar if (neededInt) { 1162be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar gp_offset_p = CGF.Builder.CreateStructGEP(VAListAddr, 0, "gp_offset_p"); 1163be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar gp_offset = CGF.Builder.CreateLoad(gp_offset_p, "gp_offset"); 1164be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar InRegs = 1165be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar CGF.Builder.CreateICmpULE(gp_offset, 1166be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::ConstantInt::get(llvm::Type::Int32Ty, 1167be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 48 - neededInt * 8), 1168be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar "fits_in_gp"); 1169be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar } 1170be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1171be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar if (neededSSE) { 1172be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar fp_offset_p = CGF.Builder.CreateStructGEP(VAListAddr, 1, "fp_offset_p"); 1173be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar fp_offset = CGF.Builder.CreateLoad(fp_offset_p, "fp_offset"); 1174be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::Value *FitsInFP = 1175be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar CGF.Builder.CreateICmpULE(fp_offset, 1176be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::ConstantInt::get(llvm::Type::Int32Ty, 117790dafa1638edaffbba4b50f504d1470428a2d25dDaniel Dunbar 176 - neededSSE * 16), 1178be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar "fits_in_fp"); 1179f231346438e61e59ff7b72d5ecbd58b6ae484211Daniel Dunbar InRegs = InRegs ? CGF.Builder.CreateAnd(InRegs, FitsInFP) : FitsInFP; 1180be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar } 1181be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1182be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::BasicBlock *InRegBlock = CGF.createBasicBlock("vaarg.in_reg"); 1183be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::BasicBlock *InMemBlock = CGF.createBasicBlock("vaarg.in_mem"); 1184be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("vaarg.end"); 1185be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar CGF.Builder.CreateCondBr(InRegs, InRegBlock, InMemBlock); 1186be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1187be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // Emit code to load the value if it was passed in registers. 1188be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1189be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar CGF.EmitBlock(InRegBlock); 1190be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1191be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // AMD64-ABI 3.5.7p5: Step 4. Fetch type from l->reg_save_area with 1192be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // an offset of l->gp_offset and/or l->fp_offset. This may require 1193be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // copying to a temporary location in case the parameter is passed 1194be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // in different register classes or requires an alignment greater 1195be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // than 8 for general purpose registers and 16 for XMM registers. 11963e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar // 1197f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This really results in shameful code when we end up needing to 1198f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // collect arguments from different places; often what should result in a 1199f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // simple assembling of a structure from scattered addresses has many more 1200f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // loads than necessary. Can we clean this up? 1201be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar const llvm::Type *LTy = CGF.ConvertTypeForMem(Ty); 1202be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::Value *RegAddr = 1203be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar CGF.Builder.CreateLoad(CGF.Builder.CreateStructGEP(VAListAddr, 3), 1204be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar "reg_save_area"); 1205be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar if (neededInt && neededSSE) { 120655e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar // FIXME: Cleanup. 120755e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar assert(AI.isCoerce() && "Unexpected ABI info for mixed regs"); 120855e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar const llvm::StructType *ST = cast<llvm::StructType>(AI.getCoerceToType()); 120955e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar llvm::Value *Tmp = CGF.CreateTempAlloca(ST); 121055e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar assert(ST->getNumElements() == 2 && "Unexpected ABI info for mixed regs"); 121155e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar const llvm::Type *TyLo = ST->getElementType(0); 121255e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar const llvm::Type *TyHi = ST->getElementType(1); 121355e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar assert((TyLo->isFloatingPoint() ^ TyHi->isFloatingPoint()) && 121455e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar "Unexpected ABI info for mixed regs"); 121555e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar const llvm::Type *PTyLo = llvm::PointerType::getUnqual(TyLo); 121655e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar const llvm::Type *PTyHi = llvm::PointerType::getUnqual(TyHi); 121755e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar llvm::Value *GPAddr = CGF.Builder.CreateGEP(RegAddr, gp_offset); 121855e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar llvm::Value *FPAddr = CGF.Builder.CreateGEP(RegAddr, fp_offset); 121955e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar llvm::Value *RegLoAddr = TyLo->isFloatingPoint() ? FPAddr : GPAddr; 122055e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar llvm::Value *RegHiAddr = TyLo->isFloatingPoint() ? GPAddr : FPAddr; 122155e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar llvm::Value *V = 122255e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar CGF.Builder.CreateLoad(CGF.Builder.CreateBitCast(RegLoAddr, PTyLo)); 122355e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar CGF.Builder.CreateStore(V, CGF.Builder.CreateStructGEP(Tmp, 0)); 122455e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar V = CGF.Builder.CreateLoad(CGF.Builder.CreateBitCast(RegHiAddr, PTyHi)); 122555e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar CGF.Builder.CreateStore(V, CGF.Builder.CreateStructGEP(Tmp, 1)); 122655e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar 122755e5d8956be516d66db2196bd0ce3c30ebf5fbf0Daniel Dunbar RegAddr = CGF.Builder.CreateBitCast(Tmp, llvm::PointerType::getUnqual(LTy)); 1228be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar } else if (neededInt) { 1229be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar RegAddr = CGF.Builder.CreateGEP(RegAddr, gp_offset); 1230be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar RegAddr = CGF.Builder.CreateBitCast(RegAddr, 1231be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::PointerType::getUnqual(LTy)); 1232be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar } else { 12333e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar if (neededSSE == 1) { 12343e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar RegAddr = CGF.Builder.CreateGEP(RegAddr, fp_offset); 12353e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar RegAddr = CGF.Builder.CreateBitCast(RegAddr, 12363e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar llvm::PointerType::getUnqual(LTy)); 12373e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar } else { 12383e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar assert(neededSSE == 2 && "Invalid number of needed registers!"); 12393e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar // SSE registers are spaced 16 bytes apart in the register save 12403e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar // area, we need to collect the two eightbytes together. 12413e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar llvm::Value *RegAddrLo = CGF.Builder.CreateGEP(RegAddr, fp_offset); 12423e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar llvm::Value *RegAddrHi = 12433e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar CGF.Builder.CreateGEP(RegAddrLo, 12443e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar llvm::ConstantInt::get(llvm::Type::Int32Ty, 16)); 12453e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar const llvm::Type *DblPtrTy = 12463e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar llvm::PointerType::getUnqual(llvm::Type::DoubleTy); 12473e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar const llvm::StructType *ST = llvm::StructType::get(llvm::Type::DoubleTy, 12483e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar llvm::Type::DoubleTy, 12493e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar NULL); 12503e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar llvm::Value *V, *Tmp = CGF.CreateTempAlloca(ST); 12513e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar V = CGF.Builder.CreateLoad(CGF.Builder.CreateBitCast(RegAddrLo, 12523e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar DblPtrTy)); 12533e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar CGF.Builder.CreateStore(V, CGF.Builder.CreateStructGEP(Tmp, 0)); 12543e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar V = CGF.Builder.CreateLoad(CGF.Builder.CreateBitCast(RegAddrHi, 12553e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar DblPtrTy)); 12563e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar CGF.Builder.CreateStore(V, CGF.Builder.CreateStructGEP(Tmp, 1)); 12573e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar RegAddr = CGF.Builder.CreateBitCast(Tmp, 12583e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar llvm::PointerType::getUnqual(LTy)); 12593e030b4c04546229c81449fde66f71b23b3fc550Daniel Dunbar } 1260be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar } 1261be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1262be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // AMD64-ABI 3.5.7p5: Step 5. Set: 1263be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // l->gp_offset = l->gp_offset + num_gp * 8 1264be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // l->fp_offset = l->fp_offset + num_fp * 16. 1265be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar if (neededInt) { 1266be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::Value *Offset = llvm::ConstantInt::get(llvm::Type::Int32Ty, 1267be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar neededInt * 8); 1268be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar CGF.Builder.CreateStore(CGF.Builder.CreateAdd(gp_offset, Offset), 1269be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar gp_offset_p); 1270be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar } 1271be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar if (neededSSE) { 1272be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::Value *Offset = llvm::ConstantInt::get(llvm::Type::Int32Ty, 1273be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar neededSSE * 16); 1274be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar CGF.Builder.CreateStore(CGF.Builder.CreateAdd(fp_offset, Offset), 1275be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar fp_offset_p); 1276be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar } 1277be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar CGF.EmitBranch(ContBlock); 1278be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1279be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // Emit code to load the value if it was passed in memory. 1280be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1281be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar CGF.EmitBlock(InMemBlock); 1282be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::Value *MemAddr = EmitVAArgFromMemory(VAListAddr, Ty, CGF); 1283be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1284be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar // Return the appropriate result. 1285be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1286be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar CGF.EmitBlock(ContBlock); 1287be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar llvm::PHINode *ResAddr = CGF.Builder.CreatePHI(RegAddr->getType(), 1288be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar "vaarg.addr"); 1289be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar ResAddr->reserveOperandSpace(2); 1290be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar ResAddr->addIncoming(RegAddr, InRegBlock); 1291be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar ResAddr->addIncoming(MemAddr, InMemBlock); 1292be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar 1293be9eb0937c667e2823971966adf960f86d3985d6Daniel Dunbar return ResAddr; 1294b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar} 1295b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar 129670aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta// ABI Info for PIC16 129770aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Guptaclass PIC16ABIInfo : public ABIInfo { 129870aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta ABIArgInfo classifyReturnType(QualType RetTy, 129970aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta ASTContext &Context) const; 130070aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta 130170aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta ABIArgInfo classifyArgumentType(QualType RetTy, 130270aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta ASTContext &Context) const; 130370aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta 130470aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta virtual void computeInfo(CGFunctionInfo &FI, ASTContext &Context) const { 130570aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta FI.getReturnInfo() = classifyReturnType(FI.getReturnType(), Context); 130670aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta for (CGFunctionInfo::arg_iterator it = FI.arg_begin(), ie = FI.arg_end(); 130770aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta it != ie; ++it) 130870aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta it->info = classifyArgumentType(it->type, Context); 130970aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta } 131070aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta 131170aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta virtual llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 131270aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta CodeGenFunction &CGF) const; 131370aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta 131470aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta}; 131570aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta 131670aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv GuptaABIArgInfo PIC16ABIInfo::classifyReturnType(QualType RetTy, 131770aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta ASTContext &Context) const { 131870aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta if (RetTy->isVoidType()) { 131970aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta return ABIArgInfo::getIgnore(); 132070aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta } else { 132170aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta return ABIArgInfo::getDirect(); 132270aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta } 132370aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta} 132470aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta 132570aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv GuptaABIArgInfo PIC16ABIInfo::classifyArgumentType(QualType Ty, 132670aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta ASTContext &Context) const { 132770aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta return ABIArgInfo::getDirect(); 132870aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta} 132970aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta 133070aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Guptallvm::Value *PIC16ABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 133170aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta CodeGenFunction &CGF) const { 133270aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta return 0; 133370aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta} 133470aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta 1335a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedmanclass ARMABIInfo : public ABIInfo { 1336a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman ABIArgInfo classifyReturnType(QualType RetTy, 1337a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman ASTContext &Context) const; 1338a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman 1339a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman ABIArgInfo classifyArgumentType(QualType RetTy, 1340a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman ASTContext &Context) const; 1341a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman 1342a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman virtual void computeInfo(CGFunctionInfo &FI, ASTContext &Context) const; 1343a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman 1344a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman virtual llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 1345a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman CodeGenFunction &CGF) const; 1346a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman}; 1347a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman 1348a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedmanvoid ARMABIInfo::computeInfo(CGFunctionInfo &FI, ASTContext &Context) const { 1349a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman FI.getReturnInfo() = classifyReturnType(FI.getReturnType(), Context); 1350a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman for (CGFunctionInfo::arg_iterator it = FI.arg_begin(), ie = FI.arg_end(); 1351a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman it != ie; ++it) { 1352a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman it->info = classifyArgumentType(it->type, Context); 1353a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman } 1354a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman} 1355a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman 1356a027ea94d6e4f501f9fa690ac728f68c62612a7dEli FriedmanABIArgInfo ARMABIInfo::classifyArgumentType(QualType Ty, 1357a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman ASTContext &Context) const { 1358a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman if (!CodeGenFunction::hasAggregateLLVMType(Ty)) { 1359a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman return ABIArgInfo::getDirect(); 1360a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman } 1361f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This is kind of nasty... but there isn't much choice because the ARM 1362f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // backend doesn't support byval. 1363a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman // FIXME: This doesn't handle alignment > 64 bits. 1364a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman const llvm::Type* ElemTy; 1365a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman unsigned SizeRegs; 1366a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman if (Context.getTypeAlign(Ty) > 32) { 1367a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman ElemTy = llvm::Type::Int64Ty; 1368a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman SizeRegs = (Context.getTypeSize(Ty) + 63) / 64; 1369a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman } else { 1370a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman ElemTy = llvm::Type::Int32Ty; 1371a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman SizeRegs = (Context.getTypeSize(Ty) + 31) / 32; 1372a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman } 1373a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman std::vector<const llvm::Type*> LLVMFields; 1374a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman LLVMFields.push_back(llvm::ArrayType::get(ElemTy, SizeRegs)); 1375a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman const llvm::Type* STy = llvm::StructType::get(LLVMFields, true); 1376a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman return ABIArgInfo::getCoerce(STy); 1377a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman} 1378a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman 1379a027ea94d6e4f501f9fa690ac728f68c62612a7dEli FriedmanABIArgInfo ARMABIInfo::classifyReturnType(QualType RetTy, 1380a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman ASTContext &Context) const { 1381a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman if (RetTy->isVoidType()) { 1382a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman return ABIArgInfo::getIgnore(); 1383a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman } else if (CodeGenFunction::hasAggregateLLVMType(RetTy)) { 1384a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman // Aggregates <= 4 bytes are returned in r0; other aggregates 1385a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman // are returned indirectly. 1386a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman uint64_t Size = Context.getTypeSize(RetTy); 1387a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman if (Size <= 32) 1388a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman return ABIArgInfo::getCoerce(llvm::Type::Int32Ty); 1389a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman return ABIArgInfo::getIndirect(0); 1390a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman } else { 1391a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman return ABIArgInfo::getDirect(); 1392a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman } 1393a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman} 1394a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman 1395a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedmanllvm::Value *ARMABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 1396a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman CodeGenFunction &CGF) const { 1397a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman // FIXME: Need to handle alignment 1398a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman const llvm::Type *BP = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 1399a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman const llvm::Type *BPP = llvm::PointerType::getUnqual(BP); 1400a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman 1401a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman CGBuilderTy &Builder = CGF.Builder; 1402a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman llvm::Value *VAListAddrAsBPP = Builder.CreateBitCast(VAListAddr, BPP, 1403a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman "ap"); 1404a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman llvm::Value *Addr = Builder.CreateLoad(VAListAddrAsBPP, "ap.cur"); 1405a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman llvm::Type *PTy = 1406a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman llvm::PointerType::getUnqual(CGF.ConvertType(Ty)); 1407a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman llvm::Value *AddrTyped = Builder.CreateBitCast(Addr, PTy); 1408a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman 1409a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman uint64_t Offset = 1410a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman llvm::RoundUpToAlignment(CGF.getContext().getTypeSize(Ty) / 8, 4); 1411a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman llvm::Value *NextAddr = 1412a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman Builder.CreateGEP(Addr, 1413a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman llvm::ConstantInt::get(llvm::Type::Int32Ty, Offset), 1414a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman "ap.next"); 1415a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman Builder.CreateStore(NextAddr, VAListAddrAsBPP); 1416a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman 1417a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman return AddrTyped; 1418a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman} 1419a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman 14206b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel DunbarABIArgInfo DefaultABIInfo::classifyReturnType(QualType RetTy, 1421b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar ASTContext &Context) const { 14220bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar if (RetTy->isVoidType()) { 14230bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar return ABIArgInfo::getIgnore(); 14240bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar } else if (CodeGenFunction::hasAggregateLLVMType(RetTy)) { 142511e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar return ABIArgInfo::getIndirect(0); 14260bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar } else { 14270bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar return ABIArgInfo::getDirect(); 14280bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar } 14296b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar} 14306b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar 14316b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel DunbarABIArgInfo DefaultABIInfo::classifyArgumentType(QualType Ty, 1432b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar ASTContext &Context) const { 14330bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar if (CodeGenFunction::hasAggregateLLVMType(Ty)) { 143411e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar return ABIArgInfo::getIndirect(0); 14350bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar } else { 14360bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar return ABIArgInfo::getDirect(); 14370bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar } 14386b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar} 14396b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar 1440b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbarllvm::Value *DefaultABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty, 1441b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar CodeGenFunction &CGF) const { 1442b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar return 0; 1443b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar} 1444b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar 14456b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbarconst ABIInfo &CodeGenTypes::getABIInfo() const { 14466b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar if (TheABIInfo) 14476b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar return *TheABIInfo; 14486b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar 14496b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar // For now we just cache this in the CodeGenTypes and don't bother 14506b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar // to free it. 14516b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar const char *TargetPrefix = getContext().Target.getTargetPrefix(); 14526b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar if (strcmp(TargetPrefix, "x86") == 0) { 14539fd58e85d59f8244c7ba289ae4f9b4f5e0b4c98fEli Friedman bool IsDarwin = strstr(getContext().Target.getTargetTriple(), "darwin"); 1454d4edfe4746c66d2ac452c8a8d7cac17192283e75Daniel Dunbar switch (getContext().Target.getPointerWidth(0)) { 1455d4edfe4746c66d2ac452c8a8d7cac17192283e75Daniel Dunbar case 32: 14566ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor return *(TheABIInfo = new X86_32ABIInfo(Context, IsDarwin)); 1457d4edfe4746c66d2ac452c8a8d7cac17192283e75Daniel Dunbar case 64: 145811a76ed8e34901f2b997896a8c0833c6c17bc586Daniel Dunbar return *(TheABIInfo = new X86_64ABIInfo()); 1459d4edfe4746c66d2ac452c8a8d7cac17192283e75Daniel Dunbar } 1460a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman } else if (strcmp(TargetPrefix, "arm") == 0) { 1461a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman // FIXME: Support for OABI? 1462a027ea94d6e4f501f9fa690ac728f68c62612a7dEli Friedman return *(TheABIInfo = new ARMABIInfo()); 146370aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta } else if (strcmp(TargetPrefix, "pic16") == 0) { 146470aa5f9e9f3ec77327f701562efc53d7c36c5843Sanjiv Gupta return *(TheABIInfo = new PIC16ABIInfo()); 14656b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar } 14666b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar 14676b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar return *(TheABIInfo = new DefaultABIInfo); 14686b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar} 14696b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar 14702c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar/***/ 14712c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar 147288c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel DunbarCGFunctionInfo::CGFunctionInfo(QualType ResTy, 147388c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar const llvm::SmallVector<QualType, 16> &ArgTys) { 147488c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar NumArgs = ArgTys.size(); 147588c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar Args = new ArgInfo[1 + NumArgs]; 147688c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar Args[0].type = ResTy; 147788c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar for (unsigned i = 0; i < NumArgs; ++i) 147888c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar Args[1 + i].type = ArgTys[i]; 147988c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar} 148088c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar 148188c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar/***/ 148288c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar 14835627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbarvoid CodeGenTypes::GetExpandedTypes(QualType Ty, 14845627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar std::vector<const llvm::Type*> &ArgTys) { 14855627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar const RecordType *RT = Ty->getAsStructureType(); 14865627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar assert(RT && "Can only expand structure types."); 14875627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar const RecordDecl *RD = RT->getDecl(); 14885627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar assert(!RD->hasFlexibleArrayMember() && 14895627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar "Cannot expand structure with flexible array."); 14905627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar 14916ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor for (RecordDecl::field_iterator i = RD->field_begin(Context), 14926ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor e = RD->field_end(Context); i != e; ++i) { 14935627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar const FieldDecl *FD = *i; 14945627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar assert(!FD->isBitField() && 14955627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar "Cannot expand structure with bit-field members."); 14965627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar 14975627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar QualType FT = FD->getType(); 14985627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar if (CodeGenFunction::hasAggregateLLVMType(FT)) { 14995627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar GetExpandedTypes(FT, ArgTys); 15005627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar } else { 15015627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar ArgTys.push_back(ConvertType(FT)); 15025627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar } 15035627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar } 15045627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar} 15055627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar 15065627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbarllvm::Function::arg_iterator 15075627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel DunbarCodeGenFunction::ExpandTypeFromArgs(QualType Ty, LValue LV, 15085627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar llvm::Function::arg_iterator AI) { 15095627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar const RecordType *RT = Ty->getAsStructureType(); 15105627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar assert(RT && "Can only expand structure types."); 15115627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar 15125627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar RecordDecl *RD = RT->getDecl(); 15135627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar assert(LV.isSimple() && 15145627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar "Unexpected non-simple lvalue during struct expansion."); 15155627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar llvm::Value *Addr = LV.getAddress(); 15166ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor for (RecordDecl::field_iterator i = RD->field_begin(getContext()), 15176ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor e = RD->field_end(getContext()); i != e; ++i) { 15185627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar FieldDecl *FD = *i; 15195627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar QualType FT = FD->getType(); 15205627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar 15215627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar // FIXME: What are the right qualifiers here? 15225627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar LValue LV = EmitLValueForField(Addr, FD, false, 0); 15235627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar if (CodeGenFunction::hasAggregateLLVMType(FT)) { 15245627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar AI = ExpandTypeFromArgs(FT, LV, AI); 15255627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar } else { 15265627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar EmitStoreThroughLValue(RValue::get(AI), LV, FT); 15275627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar ++AI; 15285627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar } 15295627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar } 15305627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar 15315627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar return AI; 15325627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar} 15335627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar 15345627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbarvoid 15355627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel DunbarCodeGenFunction::ExpandTypeToArgs(QualType Ty, RValue RV, 15365627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar llvm::SmallVector<llvm::Value*, 16> &Args) { 15375627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar const RecordType *RT = Ty->getAsStructureType(); 15385627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar assert(RT && "Can only expand structure types."); 15395627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar 15405627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar RecordDecl *RD = RT->getDecl(); 15415627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar assert(RV.isAggregate() && "Unexpected rvalue during struct expansion"); 15425627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar llvm::Value *Addr = RV.getAggregateAddr(); 15436ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor for (RecordDecl::field_iterator i = RD->field_begin(getContext()), 15446ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor e = RD->field_end(getContext()); i != e; ++i) { 15455627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar FieldDecl *FD = *i; 15465627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar QualType FT = FD->getType(); 15475627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar 15485627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar // FIXME: What are the right qualifiers here? 15495627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar LValue LV = EmitLValueForField(Addr, FD, false, 0); 15505627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar if (CodeGenFunction::hasAggregateLLVMType(FT)) { 15515627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar ExpandTypeToArgs(FT, RValue::getAggregate(LV.getAddress()), Args); 15525627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar } else { 15535627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar RValue RV = EmitLoadOfLValue(LV, FT); 15545627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar assert(RV.isScalar() && 15555627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar "Unexpected non-scalar rvalue during struct expansion."); 15565627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar Args.push_back(RV.getScalarVal()); 15575627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar } 15585627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar } 15595627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar} 15605627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar 1561275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar/// CreateCoercedLoad - Create a load from \arg SrcPtr interpreted as 1562275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar/// a pointer to an object of type \arg Ty. 1563275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar/// 1564275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar/// This safely handles the case when the src type is smaller than the 1565275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar/// destination type; in this situation the values of bits which not 1566275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar/// present in the src are undefined. 1567275e10d62af4a129a8559253958296d8659684c9Daniel Dunbarstatic llvm::Value *CreateCoercedLoad(llvm::Value *SrcPtr, 1568275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar const llvm::Type *Ty, 1569275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar CodeGenFunction &CGF) { 1570275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar const llvm::Type *SrcTy = 1571275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar cast<llvm::PointerType>(SrcPtr->getType())->getElementType(); 15729408c45009b417e758749b3d95cdfb87dcb68ea9Duncan Sands uint64_t SrcSize = CGF.CGM.getTargetData().getTypeAllocSize(SrcTy); 15739408c45009b417e758749b3d95cdfb87dcb68ea9Duncan Sands uint64_t DstSize = CGF.CGM.getTargetData().getTypeAllocSize(Ty); 1574275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar 1575b225be44aaab85a603e80dbe0eb3d81638b20d23Daniel Dunbar // If load is legal, just bitcast the src pointer. 15767ef455be9beb7a755d815bfbdc38d55d1ce59b86Daniel Dunbar if (SrcSize >= DstSize) { 1577f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Generally SrcSize is never greater than DstSize, since this means we are 1578f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // losing bits. However, this can happen in cases where the structure has 1579f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // additional padding, for example due to a user specified alignment. 15807ef455be9beb7a755d815bfbdc38d55d1ce59b86Daniel Dunbar // 1581f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: Assert that we aren't truncating non-padding bits when have access 1582f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // to that information. 1583275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar llvm::Value *Casted = 1584275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar CGF.Builder.CreateBitCast(SrcPtr, llvm::PointerType::getUnqual(Ty)); 1585386621f5e12f5db95af3b82250b08fdae3e3d321Daniel Dunbar llvm::LoadInst *Load = CGF.Builder.CreateLoad(Casted); 1586386621f5e12f5db95af3b82250b08fdae3e3d321Daniel Dunbar // FIXME: Use better alignment / avoid requiring aligned load. 1587386621f5e12f5db95af3b82250b08fdae3e3d321Daniel Dunbar Load->setAlignment(1); 1588386621f5e12f5db95af3b82250b08fdae3e3d321Daniel Dunbar return Load; 1589275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar } else { 1590275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar // Otherwise do coercion through memory. This is stupid, but 1591275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar // simple. 1592275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar llvm::Value *Tmp = CGF.CreateTempAlloca(Ty); 1593275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar llvm::Value *Casted = 1594275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar CGF.Builder.CreateBitCast(Tmp, llvm::PointerType::getUnqual(SrcTy)); 1595386621f5e12f5db95af3b82250b08fdae3e3d321Daniel Dunbar llvm::StoreInst *Store = 1596386621f5e12f5db95af3b82250b08fdae3e3d321Daniel Dunbar CGF.Builder.CreateStore(CGF.Builder.CreateLoad(SrcPtr), Casted); 1597386621f5e12f5db95af3b82250b08fdae3e3d321Daniel Dunbar // FIXME: Use better alignment / avoid requiring aligned store. 1598386621f5e12f5db95af3b82250b08fdae3e3d321Daniel Dunbar Store->setAlignment(1); 1599275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar return CGF.Builder.CreateLoad(Tmp); 1600275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar } 1601275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar} 1602275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar 1603275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar/// CreateCoercedStore - Create a store to \arg DstPtr from \arg Src, 1604275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar/// where the source and destination may have different types. 1605275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar/// 1606275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar/// This safely handles the case when the src type is larger than the 1607275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar/// destination type; the upper bits of the src will be lost. 1608275e10d62af4a129a8559253958296d8659684c9Daniel Dunbarstatic void CreateCoercedStore(llvm::Value *Src, 1609275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar llvm::Value *DstPtr, 1610275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar CodeGenFunction &CGF) { 1611275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar const llvm::Type *SrcTy = Src->getType(); 1612275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar const llvm::Type *DstTy = 1613275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar cast<llvm::PointerType>(DstPtr->getType())->getElementType(); 1614275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar 16159408c45009b417e758749b3d95cdfb87dcb68ea9Duncan Sands uint64_t SrcSize = CGF.CGM.getTargetData().getTypeAllocSize(SrcTy); 16169408c45009b417e758749b3d95cdfb87dcb68ea9Duncan Sands uint64_t DstSize = CGF.CGM.getTargetData().getTypeAllocSize(DstTy); 1617275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar 161888c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar // If store is legal, just bitcast the src pointer. 16197ef455be9beb7a755d815bfbdc38d55d1ce59b86Daniel Dunbar if (SrcSize >= DstSize) { 1620f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Generally SrcSize is never greater than DstSize, since this means we are 1621f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // losing bits. However, this can happen in cases where the structure has 1622f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // additional padding, for example due to a user specified alignment. 16237ef455be9beb7a755d815bfbdc38d55d1ce59b86Daniel Dunbar // 1624f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: Assert that we aren't truncating non-padding bits when have access 1625f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // to that information. 1626275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar llvm::Value *Casted = 1627275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar CGF.Builder.CreateBitCast(DstPtr, llvm::PointerType::getUnqual(SrcTy)); 1628386621f5e12f5db95af3b82250b08fdae3e3d321Daniel Dunbar // FIXME: Use better alignment / avoid requiring aligned store. 1629386621f5e12f5db95af3b82250b08fdae3e3d321Daniel Dunbar CGF.Builder.CreateStore(Src, Casted)->setAlignment(1); 1630275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar } else { 1631275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar // Otherwise do coercion through memory. This is stupid, but 1632275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar // simple. 1633275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar llvm::Value *Tmp = CGF.CreateTempAlloca(SrcTy); 1634275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar CGF.Builder.CreateStore(Src, Tmp); 1635275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar llvm::Value *Casted = 1636275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar CGF.Builder.CreateBitCast(Tmp, llvm::PointerType::getUnqual(DstTy)); 1637386621f5e12f5db95af3b82250b08fdae3e3d321Daniel Dunbar llvm::LoadInst *Load = CGF.Builder.CreateLoad(Casted); 1638386621f5e12f5db95af3b82250b08fdae3e3d321Daniel Dunbar // FIXME: Use better alignment / avoid requiring aligned load. 1639386621f5e12f5db95af3b82250b08fdae3e3d321Daniel Dunbar Load->setAlignment(1); 1640386621f5e12f5db95af3b82250b08fdae3e3d321Daniel Dunbar CGF.Builder.CreateStore(Load, DstPtr); 1641275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar } 1642275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar} 1643275e10d62af4a129a8559253958296d8659684c9Daniel Dunbar 16445627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar/***/ 16455627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar 164688b5396b0897f28d22ae3debf4a0d97b33b6c362Daniel Dunbarbool CodeGenModule::ReturnTypeUsesSret(const CGFunctionInfo &FI) { 164711e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar return FI.getReturnInfo().isIndirect(); 1648bb36d331f439f49859efcfb4435c61762fbba6f9Daniel Dunbar} 1649bb36d331f439f49859efcfb4435c61762fbba6f9Daniel Dunbar 165045c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbarconst llvm::FunctionType * 1651bb36d331f439f49859efcfb4435c61762fbba6f9Daniel DunbarCodeGenTypes::GetFunctionType(const CGFunctionInfo &FI, bool IsVariadic) { 165245c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar std::vector<const llvm::Type*> ArgTys; 165345c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar 165445c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar const llvm::Type *ResultType = 0; 165545c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar 1656a0a99e02f5b2de3817706071077298ef040634feDaniel Dunbar QualType RetTy = FI.getReturnType(); 1657b225be44aaab85a603e80dbe0eb3d81638b20d23Daniel Dunbar const ABIArgInfo &RetAI = FI.getReturnInfo(); 16588951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar switch (RetAI.getKind()) { 16598951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar case ABIArgInfo::Expand: 16608951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar assert(0 && "Invalid ABI kind for return argument"); 16618951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar 166246327aaf031529be2cf8bb21bc76d7a5ae0d43cdDaniel Dunbar case ABIArgInfo::Direct: 166346327aaf031529be2cf8bb21bc76d7a5ae0d43cdDaniel Dunbar ResultType = ConvertType(RetTy); 166446327aaf031529be2cf8bb21bc76d7a5ae0d43cdDaniel Dunbar break; 166546327aaf031529be2cf8bb21bc76d7a5ae0d43cdDaniel Dunbar 166611e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar case ABIArgInfo::Indirect: { 166711e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar assert(!RetAI.getIndirectAlign() && "Align unused on indirect return."); 166845c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar ResultType = llvm::Type::VoidTy; 166962d5c1b5038cdaa4a887a03c37fe1e8d00166ea0Daniel Dunbar const llvm::Type *STy = ConvertType(RetTy); 167045c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar ArgTys.push_back(llvm::PointerType::get(STy, RetTy.getAddressSpace())); 167145c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar break; 167245c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar } 167345c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar 167411434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar case ABIArgInfo::Ignore: 167511434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar ResultType = llvm::Type::VoidTy; 167611434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar break; 167711434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar 167845c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar case ABIArgInfo::Coerce: 1679639ffe47097d01249b98b7acd102aaad6697b43aDaniel Dunbar ResultType = RetAI.getCoerceToType(); 168045c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar break; 168145c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar } 168245c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar 168388c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar for (CGFunctionInfo::const_arg_iterator it = FI.arg_begin(), 168488c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar ie = FI.arg_end(); it != ie; ++it) { 168588c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar const ABIArgInfo &AI = it->info; 16868951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar 16878951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar switch (AI.getKind()) { 168811434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar case ABIArgInfo::Ignore: 168911434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar break; 169011434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar 16915627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar case ABIArgInfo::Coerce: 169289c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar ArgTys.push_back(AI.getCoerceToType()); 169389c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar break; 169489c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar 1695adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar case ABIArgInfo::Indirect: { 169611e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar // indirect arguments are always on the stack, which is addr space #0. 1697adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar const llvm::Type *LTy = ConvertTypeForMem(it->type); 1698adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar ArgTys.push_back(llvm::PointerType::getUnqual(LTy)); 16998951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar break; 1700adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar } 17018951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar 170246327aaf031529be2cf8bb21bc76d7a5ae0d43cdDaniel Dunbar case ABIArgInfo::Direct: 17031f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar ArgTys.push_back(ConvertType(it->type)); 17048951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar break; 17058951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar 17068951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar case ABIArgInfo::Expand: 170788c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar GetExpandedTypes(it->type, ArgTys); 17088951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar break; 17098951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar } 171045c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar } 171145c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar 1712bb36d331f439f49859efcfb4435c61762fbba6f9Daniel Dunbar return llvm::FunctionType::get(ResultType, ArgTys, IsVariadic); 17133913f184c84135fb4612743f1faa6c1edd2dd055Daniel Dunbar} 17143913f184c84135fb4612743f1faa6c1edd2dd055Daniel Dunbar 1715a0a99e02f5b2de3817706071077298ef040634feDaniel Dunbarvoid CodeGenModule::ConstructAttributeList(const CGFunctionInfo &FI, 171688b5396b0897f28d22ae3debf4a0d97b33b6c362Daniel Dunbar const Decl *TargetDecl, 1717761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType &PAL) { 17185323a4b0a1c248fa2ffdf886bb41a5d8fba71d2dDaniel Dunbar unsigned FuncAttrs = 0; 1719a2c6912c416c2d9f79d18f3a88ab0ae2609286c3Devang Patel unsigned RetAttrs = 0; 17205323a4b0a1c248fa2ffdf886bb41a5d8fba71d2dDaniel Dunbar 17211102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov // FIXME: handle sseregparm someday... 17225323a4b0a1c248fa2ffdf886bb41a5d8fba71d2dDaniel Dunbar if (TargetDecl) { 1723b11fa0d25d86169f0e0a29d5398116c0212bb787Daniel Dunbar if (TargetDecl->hasAttr<NoThrowAttr>()) 1724761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel FuncAttrs |= llvm::Attribute::NoUnwind; 1725b11fa0d25d86169f0e0a29d5398116c0212bb787Daniel Dunbar if (TargetDecl->hasAttr<NoReturnAttr>()) 1726761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel FuncAttrs |= llvm::Attribute::NoReturn; 1727b11fa0d25d86169f0e0a29d5398116c0212bb787Daniel Dunbar if (TargetDecl->hasAttr<ConstAttr>()) 1728232eb7d33b96ad8f99de3b5ae840421b3a7c6cb7Anders Carlsson FuncAttrs |= llvm::Attribute::ReadNone; 1729b11fa0d25d86169f0e0a29d5398116c0212bb787Daniel Dunbar else if (TargetDecl->hasAttr<PureAttr>()) 173064c2e0762628eba26c100642521b6100c2515cc5Daniel Dunbar FuncAttrs |= llvm::Attribute::ReadOnly; 17315323a4b0a1c248fa2ffdf886bb41a5d8fba71d2dDaniel Dunbar } 17325323a4b0a1c248fa2ffdf886bb41a5d8fba71d2dDaniel Dunbar 1733a0a99e02f5b2de3817706071077298ef040634feDaniel Dunbar QualType RetTy = FI.getReturnType(); 17345323a4b0a1c248fa2ffdf886bb41a5d8fba71d2dDaniel Dunbar unsigned Index = 1; 1735b225be44aaab85a603e80dbe0eb3d81638b20d23Daniel Dunbar const ABIArgInfo &RetAI = FI.getReturnInfo(); 173645c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar switch (RetAI.getKind()) { 173746327aaf031529be2cf8bb21bc76d7a5ae0d43cdDaniel Dunbar case ABIArgInfo::Direct: 17382c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar if (RetTy->isPromotableIntegerType()) { 17392c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar if (RetTy->isSignedIntegerType()) { 1740a2c6912c416c2d9f79d18f3a88ab0ae2609286c3Devang Patel RetAttrs |= llvm::Attribute::SExt; 17412c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar } else if (RetTy->isUnsignedIntegerType()) { 1742a2c6912c416c2d9f79d18f3a88ab0ae2609286c3Devang Patel RetAttrs |= llvm::Attribute::ZExt; 17432c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar } 17442c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar } 17452c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar break; 17462c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar 174711e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar case ABIArgInfo::Indirect: 1748761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel PAL.push_back(llvm::AttributeWithIndex::get(Index, 1749725ad31086e3d6c41afa10c43db44f2e7060a961Daniel Dunbar llvm::Attribute::StructRet | 1750725ad31086e3d6c41afa10c43db44f2e7060a961Daniel Dunbar llvm::Attribute::NoAlias)); 17515323a4b0a1c248fa2ffdf886bb41a5d8fba71d2dDaniel Dunbar ++Index; 17520ac86f0821a2ba7ae09793fee4451bef99e9b2f3Daniel Dunbar // sret disables readnone and readonly 17530ac86f0821a2ba7ae09793fee4451bef99e9b2f3Daniel Dunbar FuncAttrs &= ~(llvm::Attribute::ReadOnly | 17540ac86f0821a2ba7ae09793fee4451bef99e9b2f3Daniel Dunbar llvm::Attribute::ReadNone); 17552c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar break; 17562c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar 175711434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar case ABIArgInfo::Ignore: 17582c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar case ABIArgInfo::Coerce: 17592c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar break; 17608951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar 17618951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar case ABIArgInfo::Expand: 17628951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar assert(0 && "Invalid ABI kind for return argument"); 17635323a4b0a1c248fa2ffdf886bb41a5d8fba71d2dDaniel Dunbar } 17642c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar 1765a2c6912c416c2d9f79d18f3a88ab0ae2609286c3Devang Patel if (RetAttrs) 1766a2c6912c416c2d9f79d18f3a88ab0ae2609286c3Devang Patel PAL.push_back(llvm::AttributeWithIndex::get(0, RetAttrs)); 17671102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov 17681102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov // FIXME: we need to honour command line settings also... 17691102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov // FIXME: RegParm should be reduced in case of nested functions and/or global 17701102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov // register variable. 17711102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov signed RegParm = 0; 17721102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov if (TargetDecl) 17731102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov if (const RegparmAttr *RegParmAttr = TargetDecl->getAttr<RegparmAttr>()) 17741102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov RegParm = RegParmAttr->getNumParams(); 17751102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov 17761102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov unsigned PointerWidth = getContext().Target.getPointerWidth(0); 177788c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar for (CGFunctionInfo::const_arg_iterator it = FI.arg_begin(), 177888c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar ie = FI.arg_end(); it != ie; ++it) { 177988c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar QualType ParamType = it->type; 178088c2fa96be989571b4afb6229f0ef5a3ef4450cbDaniel Dunbar const ABIArgInfo &AI = it->info; 1781761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel unsigned Attributes = 0; 17821102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov 17838951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar switch (AI.getKind()) { 178489c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar case ABIArgInfo::Coerce: 178589c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar break; 178689c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar 178711e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar case ABIArgInfo::Indirect: 1788761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel Attributes |= llvm::Attribute::ByVal; 17891102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov Attributes |= 179011e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar llvm::Attribute::constructAlignmentFromInt(AI.getIndirectAlign()); 17910ac86f0821a2ba7ae09793fee4451bef99e9b2f3Daniel Dunbar // byval disables readnone and readonly. 17920ac86f0821a2ba7ae09793fee4451bef99e9b2f3Daniel Dunbar FuncAttrs &= ~(llvm::Attribute::ReadOnly | 17930ac86f0821a2ba7ae09793fee4451bef99e9b2f3Daniel Dunbar llvm::Attribute::ReadNone); 17948951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar break; 17958951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar 179646327aaf031529be2cf8bb21bc76d7a5ae0d43cdDaniel Dunbar case ABIArgInfo::Direct: 17978951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar if (ParamType->isPromotableIntegerType()) { 17988951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar if (ParamType->isSignedIntegerType()) { 1799761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel Attributes |= llvm::Attribute::SExt; 18008951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar } else if (ParamType->isUnsignedIntegerType()) { 1801761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel Attributes |= llvm::Attribute::ZExt; 18028951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar } 18035323a4b0a1c248fa2ffdf886bb41a5d8fba71d2dDaniel Dunbar } 18041102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov if (RegParm > 0 && 18051102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov (ParamType->isIntegerType() || ParamType->isPointerType())) { 18061102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov RegParm -= 18071102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov (Context.getTypeSize(ParamType) + PointerWidth - 1) / PointerWidth; 18081102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov if (RegParm >= 0) 18091102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov Attributes |= llvm::Attribute::InReg; 18101102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov } 18111102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov // FIXME: handle sseregparm someday... 18128951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar break; 18131102f4282ceb430dbc9fcedb9dd2ad25898a09e8Anton Korobeynikov 181411434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar case ABIArgInfo::Ignore: 181511434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar // Skip increment, no matching LLVM parameter. 181611434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar continue; 181711434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar 18185627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar case ABIArgInfo::Expand: { 18195627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar std::vector<const llvm::Type*> Tys; 1820f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This is rather inefficient. Do we ever actually need to do 1821f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // anything here? The result should be just reconstructed on the other 1822f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // side, so extension should be a non-issue. 18235627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar getTypes().GetExpandedTypes(ParamType, Tys); 18245627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar Index += Tys.size(); 18255627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar continue; 18265627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar } 18275323a4b0a1c248fa2ffdf886bb41a5d8fba71d2dDaniel Dunbar } 18288951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar 1829761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel if (Attributes) 1830761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel PAL.push_back(llvm::AttributeWithIndex::get(Index, Attributes)); 18315627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar ++Index; 18325323a4b0a1c248fa2ffdf886bb41a5d8fba71d2dDaniel Dunbar } 1833a2c6912c416c2d9f79d18f3a88ab0ae2609286c3Devang Patel if (FuncAttrs) 1834a2c6912c416c2d9f79d18f3a88ab0ae2609286c3Devang Patel PAL.push_back(llvm::AttributeWithIndex::get(~0, FuncAttrs)); 18355323a4b0a1c248fa2ffdf886bb41a5d8fba71d2dDaniel Dunbar} 18365323a4b0a1c248fa2ffdf886bb41a5d8fba71d2dDaniel Dunbar 183788b5396b0897f28d22ae3debf4a0d97b33b6c362Daniel Dunbarvoid CodeGenFunction::EmitFunctionProlog(const CGFunctionInfo &FI, 183888b5396b0897f28d22ae3debf4a0d97b33b6c362Daniel Dunbar llvm::Function *Fn, 183917b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar const FunctionArgList &Args) { 1840f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: We no longer need the types from FunctionArgList; lift up and 1841f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // simplify. 18425251afa21d3583f2740fd4f83659d008625a7260Daniel Dunbar 184317b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar // Emit allocs for param decls. Give the LLVM Argument nodes names. 184417b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar llvm::Function::arg_iterator AI = Fn->arg_begin(); 184517b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar 184617b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar // Name the struct return argument. 184788b5396b0897f28d22ae3debf4a0d97b33b6c362Daniel Dunbar if (CGM.ReturnTypeUsesSret(FI)) { 184817b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar AI->setName("agg.result"); 184917b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar ++AI; 185017b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar } 1851b225be44aaab85a603e80dbe0eb3d81638b20d23Daniel Dunbar 18524b5f0a4bd6645e87e5feae4be4675ce87d97b4a5Daniel Dunbar assert(FI.arg_size() == Args.size() && 18534b5f0a4bd6645e87e5feae4be4675ce87d97b4a5Daniel Dunbar "Mismatch between function signature & arguments."); 1854b225be44aaab85a603e80dbe0eb3d81638b20d23Daniel Dunbar CGFunctionInfo::const_arg_iterator info_it = FI.arg_begin(); 185517b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar for (FunctionArgList::const_iterator i = Args.begin(), e = Args.end(); 1856b225be44aaab85a603e80dbe0eb3d81638b20d23Daniel Dunbar i != e; ++i, ++info_it) { 185717b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar const VarDecl *Arg = i->first; 1858b225be44aaab85a603e80dbe0eb3d81638b20d23Daniel Dunbar QualType Ty = info_it->type; 1859b225be44aaab85a603e80dbe0eb3d81638b20d23Daniel Dunbar const ABIArgInfo &ArgI = info_it->info; 18608951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar 18618951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar switch (ArgI.getKind()) { 18621f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar case ABIArgInfo::Indirect: { 18631f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar llvm::Value* V = AI; 18641f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar if (hasAggregateLLVMType(Ty)) { 18651f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar // Do nothing, aggregates and complex variables are accessed by 18661f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar // reference. 18671f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar } else { 18681f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar // Load scalar value from indirect argument. 1869adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar V = EmitLoadOfScalar(V, false, Ty); 18701f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar if (!getContext().typesAreCompatible(Ty, Arg->getType())) { 18711f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar // This must be a promotion, for something like 18721f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar // "void a(x) short x; {..." 18731f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar V = EmitScalarConversion(V, Ty, Arg->getType()); 18741f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar } 18751f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar } 18761f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar EmitParmDecl(*Arg, V); 18771f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar break; 18781f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar } 18791f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar 188046327aaf031529be2cf8bb21bc76d7a5ae0d43cdDaniel Dunbar case ABIArgInfo::Direct: { 18818951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar assert(AI != Fn->arg_end() && "Argument mismatch!"); 18828951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar llvm::Value* V = AI; 18832fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar if (hasAggregateLLVMType(Ty)) { 18842fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar // Create a temporary alloca to hold the argument; the rest of 18852fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar // codegen expects to access aggregates & complex values by 18862fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar // reference. 1887adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar V = CreateTempAlloca(ConvertTypeForMem(Ty)); 18882fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar Builder.CreateStore(AI, V); 18892fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar } else { 18902fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar if (!getContext().typesAreCompatible(Ty, Arg->getType())) { 18912fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar // This must be a promotion, for something like 18922fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar // "void a(x) short x; {..." 18932fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar V = EmitScalarConversion(V, Ty, Arg->getType()); 18942fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar } 189517b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar } 18968951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar EmitParmDecl(*Arg, V); 18978951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar break; 18988951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar } 18998951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar 19005627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar case ABIArgInfo::Expand: { 1901b225be44aaab85a603e80dbe0eb3d81638b20d23Daniel Dunbar // If this structure was expanded into multiple arguments then 19025627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar // we need to create a temporary and reconstruct it from the 19035627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar // arguments. 190439f34e97d6a468f0a7dfa5664c61217cffc65b74Chris Lattner std::string Name = Arg->getNameAsString(); 1905adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar llvm::Value *Temp = CreateTempAlloca(ConvertTypeForMem(Ty), 19065627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar (Name + ".addr").c_str()); 19075627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar // FIXME: What are the right qualifiers here? 19085627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar llvm::Function::arg_iterator End = 19095627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar ExpandTypeFromArgs(Ty, LValue::MakeAddr(Temp,0), AI); 19105627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar EmitParmDecl(*Arg, Temp); 19115627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar 19125627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar // Name the arguments used in expansion and increment AI. 19135627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar unsigned Index = 0; 19145627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar for (; AI != End; ++AI, ++Index) 19155627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar AI->setName(Name + "." + llvm::utostr(Index)); 19165627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar continue; 19175627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar } 191811434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar 191911434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar case ABIArgInfo::Ignore: 19208b979d9e4c41fb67eb276996bdaa608fb4b11ccdDaniel Dunbar // Initialize the local variable appropriately. 19218b979d9e4c41fb67eb276996bdaa608fb4b11ccdDaniel Dunbar if (hasAggregateLLVMType(Ty)) { 1922adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar EmitParmDecl(*Arg, CreateTempAlloca(ConvertTypeForMem(Ty))); 19238b979d9e4c41fb67eb276996bdaa608fb4b11ccdDaniel Dunbar } else { 19248b979d9e4c41fb67eb276996bdaa608fb4b11ccdDaniel Dunbar EmitParmDecl(*Arg, llvm::UndefValue::get(ConvertType(Arg->getType()))); 19258b979d9e4c41fb67eb276996bdaa608fb4b11ccdDaniel Dunbar } 19268b979d9e4c41fb67eb276996bdaa608fb4b11ccdDaniel Dunbar 192759e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar // Skip increment, no matching LLVM parameter. 192859e5a0e4f1b3a6f4ddcb0e902e98d8b3c9d10799Daniel Dunbar continue; 192911434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar 193089c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar case ABIArgInfo::Coerce: { 193189c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar assert(AI != Fn->arg_end() && "Argument mismatch!"); 1932f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This is very wasteful; EmitParmDecl is just going to drop the 1933f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // result in a new alloca anyway, so we could just store into that 1934f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // directly if we broke the abstraction down more. 1935adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar llvm::Value *V = CreateTempAlloca(ConvertTypeForMem(Ty), "coerce"); 193689c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar CreateCoercedStore(AI, V, *this); 193789c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar // Match to what EmitParmDecl is expecting for this type. 19388b29a387788bbb7a7c3b64c37473bc46299d2132Daniel Dunbar if (!CodeGenFunction::hasAggregateLLVMType(Ty)) { 1939adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar V = EmitLoadOfScalar(V, false, Ty); 19408b29a387788bbb7a7c3b64c37473bc46299d2132Daniel Dunbar if (!getContext().typesAreCompatible(Ty, Arg->getType())) { 19418b29a387788bbb7a7c3b64c37473bc46299d2132Daniel Dunbar // This must be a promotion, for something like 19428b29a387788bbb7a7c3b64c37473bc46299d2132Daniel Dunbar // "void a(x) short x; {..." 19438b29a387788bbb7a7c3b64c37473bc46299d2132Daniel Dunbar V = EmitScalarConversion(V, Ty, Arg->getType()); 19448b29a387788bbb7a7c3b64c37473bc46299d2132Daniel Dunbar } 19458b29a387788bbb7a7c3b64c37473bc46299d2132Daniel Dunbar } 194689c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar EmitParmDecl(*Arg, V); 194789c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar break; 194889c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar } 19498951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar } 19505627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar 19515627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar ++AI; 195217b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar } 195317b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar assert(AI == Fn->arg_end() && "Argument mismatch!"); 195417b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar} 195517b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar 195688b5396b0897f28d22ae3debf4a0d97b33b6c362Daniel Dunbarvoid CodeGenFunction::EmitFunctionEpilog(const CGFunctionInfo &FI, 195717b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar llvm::Value *ReturnValue) { 19582c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar llvm::Value *RV = 0; 19592c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar 19602c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar // Functions with no result always return void. 19612c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar if (ReturnValue) { 196288b5396b0897f28d22ae3debf4a0d97b33b6c362Daniel Dunbar QualType RetTy = FI.getReturnType(); 1963b225be44aaab85a603e80dbe0eb3d81638b20d23Daniel Dunbar const ABIArgInfo &RetAI = FI.getReturnInfo(); 19642c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar 19652c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar switch (RetAI.getKind()) { 196611e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar case ABIArgInfo::Indirect: 19673aea8cac3ec9ad03b1d2b002f38a0d42a70483c8Daniel Dunbar if (RetTy->isAnyComplexType()) { 19683aea8cac3ec9ad03b1d2b002f38a0d42a70483c8Daniel Dunbar ComplexPairTy RT = LoadComplexFromAddr(ReturnValue, false); 19693aea8cac3ec9ad03b1d2b002f38a0d42a70483c8Daniel Dunbar StoreComplexToAddr(RT, CurFn->arg_begin(), false); 19703aea8cac3ec9ad03b1d2b002f38a0d42a70483c8Daniel Dunbar } else if (CodeGenFunction::hasAggregateLLVMType(RetTy)) { 19713aea8cac3ec9ad03b1d2b002f38a0d42a70483c8Daniel Dunbar EmitAggregateCopy(CurFn->arg_begin(), ReturnValue, RetTy); 19723aea8cac3ec9ad03b1d2b002f38a0d42a70483c8Daniel Dunbar } else { 1973adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar EmitStoreOfScalar(Builder.CreateLoad(ReturnValue), CurFn->arg_begin(), 1974b4aa4664ec851573624a7a29c6c750fc1d5cc268Anders Carlsson false, RetTy); 19753aea8cac3ec9ad03b1d2b002f38a0d42a70483c8Daniel Dunbar } 19762c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar break; 19778951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar 197846327aaf031529be2cf8bb21bc76d7a5ae0d43cdDaniel Dunbar case ABIArgInfo::Direct: 19792fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar // The internal return value temp always will have 19802fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar // pointer-to-return-type type. 19812c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar RV = Builder.CreateLoad(ReturnValue); 19822c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar break; 19832c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar 198411434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar case ABIArgInfo::Ignore: 198511434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar break; 198611434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar 1987adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar case ABIArgInfo::Coerce: 198854d1ccbfcf19ddf39444f1b4018dd79487cc847bDaniel Dunbar RV = CreateCoercedLoad(ReturnValue, RetAI.getCoerceToType(), *this); 19898951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar break; 19908951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar 19918951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar case ABIArgInfo::Expand: 19928951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar assert(0 && "Invalid ABI kind for return argument"); 199317b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar } 199417b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar } 19952c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar 19962c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar if (RV) { 19972c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar Builder.CreateRet(RV); 19982c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar } else { 19992c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar Builder.CreateRetVoid(); 20002c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar } 200117b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar} 200217b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar 20030139bb96494b4c4ba0824617d5d2495dc7e44c76Anders CarlssonRValue CodeGenFunction::EmitCallArg(const Expr *E, QualType ArgType) { 20044029ca7ae9d3ffd7738fe2ed8782bebc30f36fd6Anders Carlsson if (ArgType->isReferenceType()) 20054029ca7ae9d3ffd7738fe2ed8782bebc30f36fd6Anders Carlsson return EmitReferenceBindingToExpr(E, ArgType); 20064029ca7ae9d3ffd7738fe2ed8782bebc30f36fd6Anders Carlsson 20070139bb96494b4c4ba0824617d5d2495dc7e44c76Anders Carlsson return EmitAnyExprToTemp(E); 20080139bb96494b4c4ba0824617d5d2495dc7e44c76Anders Carlsson} 20090139bb96494b4c4ba0824617d5d2495dc7e44c76Anders Carlsson 201088b5396b0897f28d22ae3debf4a0d97b33b6c362Daniel DunbarRValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo, 201188b5396b0897f28d22ae3debf4a0d97b33b6c362Daniel Dunbar llvm::Value *Callee, 2012c0ef9f59937c3971c48b6fed37cf5bd8985c024bDaniel Dunbar const CallArgList &CallArgs, 2013c0ef9f59937c3971c48b6fed37cf5bd8985c024bDaniel Dunbar const Decl *TargetDecl) { 2014f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: We no longer need the types from CallArgs; lift up and simplify. 201517b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar llvm::SmallVector<llvm::Value*, 16> Args; 201617b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar 201717b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar // Handle struct-return functions by passing a pointer to the 201817b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar // location that we would like to return into. 2019bb36d331f439f49859efcfb4435c61762fbba6f9Daniel Dunbar QualType RetTy = CallInfo.getReturnType(); 2020b225be44aaab85a603e80dbe0eb3d81638b20d23Daniel Dunbar const ABIArgInfo &RetAI = CallInfo.getReturnInfo(); 20212969a0243b0939286a45d0ba58dd3e1de226ac60Daniel Dunbar if (CGM.ReturnTypeUsesSret(CallInfo)) { 202217b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar // Create a temporary alloca to hold the result of the call. :( 2023adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar Args.push_back(CreateTempAlloca(ConvertTypeForMem(RetTy))); 202417b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar } 202517b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar 20264b5f0a4bd6645e87e5feae4be4675ce87d97b4a5Daniel Dunbar assert(CallInfo.arg_size() == CallArgs.size() && 20274b5f0a4bd6645e87e5feae4be4675ce87d97b4a5Daniel Dunbar "Mismatch between function signature & arguments."); 2028b225be44aaab85a603e80dbe0eb3d81638b20d23Daniel Dunbar CGFunctionInfo::const_arg_iterator info_it = CallInfo.arg_begin(); 202917b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar for (CallArgList::const_iterator I = CallArgs.begin(), E = CallArgs.end(); 2030b225be44aaab85a603e80dbe0eb3d81638b20d23Daniel Dunbar I != E; ++I, ++info_it) { 2031b225be44aaab85a603e80dbe0eb3d81638b20d23Daniel Dunbar const ABIArgInfo &ArgInfo = info_it->info; 203217b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar RValue RV = I->first; 20335627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar 20345627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar switch (ArgInfo.getKind()) { 203511e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar case ABIArgInfo::Indirect: 20361f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar if (RV.isScalar() || RV.isComplex()) { 20371f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar // Make a temporary alloca to pass the argument. 2038adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar Args.push_back(CreateTempAlloca(ConvertTypeForMem(I->second))); 20391f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar if (RV.isScalar()) 2040b4aa4664ec851573624a7a29c6c750fc1d5cc268Anders Carlsson EmitStoreOfScalar(RV.getScalarVal(), Args.back(), false, I->second); 20411f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar else 20421f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar StoreComplexToAddr(RV.getComplexVal(), Args.back(), false); 20431f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar } else { 20441f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar Args.push_back(RV.getAggregateAddr()); 20451f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar } 20461f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar break; 20471f7459814ed78067a8f0db3e1082b45ec89c16abDaniel Dunbar 204846327aaf031529be2cf8bb21bc76d7a5ae0d43cdDaniel Dunbar case ABIArgInfo::Direct: 20495627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar if (RV.isScalar()) { 20505627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar Args.push_back(RV.getScalarVal()); 20515627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar } else if (RV.isComplex()) { 20522fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar llvm::Value *Tmp = llvm::UndefValue::get(ConvertType(I->second)); 20532fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar Tmp = Builder.CreateInsertValue(Tmp, RV.getComplexVal().first, 0); 20542fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar Tmp = Builder.CreateInsertValue(Tmp, RV.getComplexVal().second, 1); 20552fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar Args.push_back(Tmp); 20565627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar } else { 20572fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar Args.push_back(Builder.CreateLoad(RV.getAggregateAddr())); 20585627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar } 20595627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar break; 20605627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar 206111434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar case ABIArgInfo::Ignore: 206211434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar break; 206311434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar 206489c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar case ABIArgInfo::Coerce: { 206589c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar // FIXME: Avoid the conversion through memory if possible. 206689c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar llvm::Value *SrcPtr; 206789c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar if (RV.isScalar()) { 20685a1be6e16ba306c349a3c3f80e9dce800976bc24Daniel Dunbar SrcPtr = CreateTempAlloca(ConvertTypeForMem(I->second), "coerce"); 2069b4aa4664ec851573624a7a29c6c750fc1d5cc268Anders Carlsson EmitStoreOfScalar(RV.getScalarVal(), SrcPtr, false, I->second); 207089c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar } else if (RV.isComplex()) { 2071adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar SrcPtr = CreateTempAlloca(ConvertTypeForMem(I->second), "coerce"); 207289c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar StoreComplexToAddr(RV.getComplexVal(), SrcPtr, false); 207389c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar } else 207489c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar SrcPtr = RV.getAggregateAddr(); 207589c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar Args.push_back(CreateCoercedLoad(SrcPtr, ArgInfo.getCoerceToType(), 207689c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar *this)); 207789c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar break; 207889c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar } 207989c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar 20805627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar case ABIArgInfo::Expand: 20815627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar ExpandTypeToArgs(I->second, RV, Args); 20825627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar break; 208317b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar } 208417b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar } 208517b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar 20869834ffbe54788239c8361d3cfe5826fd277ddfb2Daniel Dunbar llvm::BasicBlock *InvokeDest = getInvokeDest(); 2087761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel CodeGen::AttributeListType AttributeList; 2088c0ef9f59937c3971c48b6fed37cf5bd8985c024bDaniel Dunbar CGM.ConstructAttributeList(CallInfo, TargetDecl, AttributeList); 20899834ffbe54788239c8361d3cfe5826fd277ddfb2Daniel Dunbar llvm::AttrListPtr Attrs = llvm::AttrListPtr::get(AttributeList.begin(), 20909834ffbe54788239c8361d3cfe5826fd277ddfb2Daniel Dunbar AttributeList.end()); 2091725ad31086e3d6c41afa10c43db44f2e7060a961Daniel Dunbar 2092d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar llvm::CallSite CS; 2093d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar if (!InvokeDest || (Attrs.getFnAttributes() & llvm::Attribute::NoUnwind)) { 2094beaaccd8e2a8748f77b66e2b330fb9136937e14cJay Foad CS = Builder.CreateCall(Callee, Args.data(), Args.data()+Args.size()); 20959834ffbe54788239c8361d3cfe5826fd277ddfb2Daniel Dunbar } else { 20969834ffbe54788239c8361d3cfe5826fd277ddfb2Daniel Dunbar llvm::BasicBlock *Cont = createBasicBlock("invoke.cont"); 2097d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar CS = Builder.CreateInvoke(Callee, Cont, InvokeDest, 2098beaaccd8e2a8748f77b66e2b330fb9136937e14cJay Foad Args.data(), Args.data()+Args.size()); 20999834ffbe54788239c8361d3cfe5826fd277ddfb2Daniel Dunbar EmitBlock(Cont); 2100f4fe0f082f21048c0777ad5aeac04a5a94db1f46Daniel Dunbar } 2101f4fe0f082f21048c0777ad5aeac04a5a94db1f46Daniel Dunbar 2102d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar CS.setAttributes(Attrs); 21036857d9d43b082ae825c29cca80f2f6b7c3aa4e5fTorok Edwin if (const llvm::Function *F = dyn_cast<llvm::Function>(Callee->stripPointerCasts())) 2104d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar CS.setCallingConv(F->getCallingConv()); 2105d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar 2106d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar // If the call doesn't return, finish the basic block and clear the 2107d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar // insertion point; this allows the rest of IRgen to discard 2108d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar // unreachable code. 2109d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar if (CS.doesNotReturn()) { 2110d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar Builder.CreateUnreachable(); 2111d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar Builder.ClearInsertionPoint(); 2112d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar 2113f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: For now, emit a dummy basic block because expr emitters in 2114f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // generally are not ready to handle emitting expressions at unreachable 2115f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // points. 2116d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar EnsureInsertPoint(); 2117d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar 2118d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar // Return a reasonable RValue. 2119d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar return GetUndefRValue(RetTy); 2120d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar } 2121d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar 2122d14151d5f52fa9048d41d7539299243e05755ec4Daniel Dunbar llvm::Instruction *CI = CS.getInstruction(); 21233403084886b3d0fc23eee2b5708f0ac0329423e0Chris Lattner if (Builder.isNamePreserving() && CI->getType() != llvm::Type::VoidTy) 212417b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar CI->setName("call"); 21252c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar 21262c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar switch (RetAI.getKind()) { 212711e383aa491a23ebd4a49688a09984c5e16a2e34Daniel Dunbar case ABIArgInfo::Indirect: 21282c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar if (RetTy->isAnyComplexType()) 21295627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar return RValue::getComplex(LoadComplexFromAddr(Args[0], false)); 21303403084886b3d0fc23eee2b5708f0ac0329423e0Chris Lattner if (CodeGenFunction::hasAggregateLLVMType(RetTy)) 21315627377df5439a1d3d46a4e4cef4ae44f84a322bDaniel Dunbar return RValue::getAggregate(Args[0]); 21323403084886b3d0fc23eee2b5708f0ac0329423e0Chris Lattner return RValue::get(EmitLoadOfScalar(Args[0], false, RetTy)); 21338951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar 213446327aaf031529be2cf8bb21bc76d7a5ae0d43cdDaniel Dunbar case ABIArgInfo::Direct: 21352fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar if (RetTy->isAnyComplexType()) { 21362fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar llvm::Value *Real = Builder.CreateExtractValue(CI, 0); 21372fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar llvm::Value *Imag = Builder.CreateExtractValue(CI, 1); 21382fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar return RValue::getComplex(std::make_pair(Real, Imag)); 21393403084886b3d0fc23eee2b5708f0ac0329423e0Chris Lattner } 21403403084886b3d0fc23eee2b5708f0ac0329423e0Chris Lattner if (CodeGenFunction::hasAggregateLLVMType(RetTy)) { 2141adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar llvm::Value *V = CreateTempAlloca(ConvertTypeForMem(RetTy), "agg.tmp"); 21422fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar Builder.CreateStore(CI, V); 21432fbf2f547cf23c0dd89719c2b5c5d6c6f0fa469cDaniel Dunbar return RValue::getAggregate(V); 21443403084886b3d0fc23eee2b5708f0ac0329423e0Chris Lattner } 21453403084886b3d0fc23eee2b5708f0ac0329423e0Chris Lattner return RValue::get(CI); 21462c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar 214711434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar case ABIArgInfo::Ignore: 21480bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar // If we are ignoring an argument that had a result, make sure to 21490bcc52114e37a8d152d9a05095ee7f7687c9aa94Daniel Dunbar // construct the appropriate return value for our caller. 215013e81737a433b23f8c662d10d1d57356122a8caaDaniel Dunbar return GetUndefRValue(RetTy); 215111434925bf81c932c6c8fe3533bc0ba900d50dc2Daniel Dunbar 2152639ffe47097d01249b98b7acd102aaad6697b43aDaniel Dunbar case ABIArgInfo::Coerce: { 215389c9d8e7f0700d27b1d93dc3832eb1af9b92c221Daniel Dunbar // FIXME: Avoid the conversion through memory if possible. 2154adc8bdd6ab6f4f90d16f696f16948e46acf66267Daniel Dunbar llvm::Value *V = CreateTempAlloca(ConvertTypeForMem(RetTy), "coerce"); 215554d1ccbfcf19ddf39444f1b4018dd79487cc847bDaniel Dunbar CreateCoercedStore(CI, V, *this); 2156ad3d6917dabbdab3399ff8307240aad58247d2e3Anders Carlsson if (RetTy->isAnyComplexType()) 2157ad3d6917dabbdab3399ff8307240aad58247d2e3Anders Carlsson return RValue::getComplex(LoadComplexFromAddr(V, false)); 21583403084886b3d0fc23eee2b5708f0ac0329423e0Chris Lattner if (CodeGenFunction::hasAggregateLLVMType(RetTy)) 2159ad3d6917dabbdab3399ff8307240aad58247d2e3Anders Carlsson return RValue::getAggregate(V); 21603403084886b3d0fc23eee2b5708f0ac0329423e0Chris Lattner return RValue::get(EmitLoadOfScalar(V, false, RetTy)); 2161639ffe47097d01249b98b7acd102aaad6697b43aDaniel Dunbar } 21628951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar 21638951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar case ABIArgInfo::Expand: 21648951dbd225580173193ec9db503d9d9844ff97d6Daniel Dunbar assert(0 && "Invalid ABI kind for return argument"); 216517b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar } 21662c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar 21672c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar assert(0 && "Unhandled ABIArgInfo::Kind"); 21682c8e0f32b9c33686be23c70add0b97490903de9fDaniel Dunbar return RValue::get(0); 216917b708d61827cd86278e9580b041dd6cbadf07d3Daniel Dunbar} 2170b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar 2171b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar/* VarArg handling */ 2172b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar 2173b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbarllvm::Value *CodeGenFunction::EmitVAArg(llvm::Value *VAListAddr, QualType Ty) { 2174b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar return CGM.getTypes().getABIInfo().EmitVAArg(VAListAddr, Ty, *this); 2175b4094ea09eee7d3a847cadf181a81efc99003dafDaniel Dunbar} 2176