CodeGenTypes.cpp revision 57eb23f34ed2586069273c66f1a9994fe2b42967
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- CodeGenTypes.cpp - Type translation for LLVM CodeGen -------------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump// This is the code that handles AST -> LLVM type lowering. 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "CodeGenTypes.h" 15270e203b50ed8791e61afd357596bcf050cf2bfdDaniel Dunbar#include "CGCall.h" 16f16aa103d3afd42fbca2ab346f191bf745cec092John McCall#include "CGCXXABI.h" 172924ade97ee4228fcf3518d89cd4bd1653236b48Daniel Dunbar#include "CGRecordLayout.h" 18de7fb8413b13651fd85b7125d08b3c9ac2816d9dDaniel Dunbar#include "clang/AST/ASTContext.h" 19c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 20742cd1b7bb86b52b23b335d47abbd842dac0e1bfFariborz Jahanian#include "clang/AST/DeclCXX.h" 21de7fb8413b13651fd85b7125d08b3c9ac2816d9dDaniel Dunbar#include "clang/AST/Expr.h" 2219cc4abea06a9b49e0e16a50d335c064cd723572Anders Carlsson#include "clang/AST/RecordLayout.h" 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/DerivedTypes.h" 244e533287e6a9adac78c9ac370612581aad9b8c5eAnders Carlsson#include "llvm/Module.h" 25d9e9ede6b1703849da739629904dad197306e527Devang Patel#include "llvm/Target/TargetData.h" 265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace CodeGen; 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 297a4718e813e5e99d478567a482217c7eef8572c5Devang PatelCodeGenTypes::CodeGenTypes(ASTContext &Ctx, llvm::Module& M, 30f16aa103d3afd42fbca2ab346f191bf745cec092John McCall const llvm::TargetData &TD, const ABIInfo &Info, 3108d4792bb5d9e0e7f122c6273636807029c06aaaDaniel Dunbar CGCXXABI &CXXABI, const CodeGenOptions &CGO) 326b1da0ea19c12346192f5ea4d70872c13bfcc82aDaniel Dunbar : Context(Ctx), Target(Ctx.Target), TheModule(M), TheTargetData(TD), 3308d4792bb5d9e0e7f122c6273636807029c06aaaDaniel Dunbar TheABIInfo(Info), TheCXXABI(CXXABI), CodeGenOpts(CGO) { 34be5f332c4d9eb302cd020047c382aa133ad59501Chris Lattner RecursionState = RS_Normal; 3557eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner SkippedLayout = false; 36d2d2a11a91d7ddf468bfb70f66362d24806ed601Chris Lattner} 375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 38b84a06e68ffd71da22e3c75b6e4bbdba37816413Devang PatelCodeGenTypes::~CodeGenTypes() { 391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (llvm::DenseMap<const Type *, CGRecordLayout *>::iterator 401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump I = CGRecordLayouts.begin(), E = CGRecordLayouts.end(); 41b84a06e68ffd71da22e3c75b6e4bbdba37816413Devang Patel I != E; ++I) 42b84a06e68ffd71da22e3c75b6e4bbdba37816413Devang Patel delete I->second; 436f41c17ae854c8a26126e5ea1c3cd53bd746b7baChris Lattner 446f41c17ae854c8a26126e5ea1c3cd53bd746b7baChris Lattner for (llvm::FoldingSet<CGFunctionInfo>::iterator 456f41c17ae854c8a26126e5ea1c3cd53bd746b7baChris Lattner I = FunctionInfos.begin(), E = FunctionInfos.end(); I != E; ) 466f41c17ae854c8a26126e5ea1c3cd53bd746b7baChris Lattner delete &*I++; 47b84a06e68ffd71da22e3c75b6e4bbdba37816413Devang Patel} 48b84a06e68ffd71da22e3c75b6e4bbdba37816413Devang Patel 499cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattnervoid CodeGenTypes::addRecordTypeName(const RecordDecl *RD, 509cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::StructType *Ty, 51e0047b13f0025fa1588f1b776592ed3458b226d6Anders Carlsson llvm::StringRef suffix) { 52e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson llvm::SmallString<256> TypeName; 53e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson llvm::raw_svector_ostream OS(TypeName); 54e0047b13f0025fa1588f1b776592ed3458b226d6Anders Carlsson OS << RD->getKindName() << '.'; 55e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson 56e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson // Name the codegen type after the typedef name 57e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson // if there is no tag type name available 58e0047b13f0025fa1588f1b776592ed3458b226d6Anders Carlsson if (RD->getIdentifier()) { 59e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson // FIXME: We should not have to check for a null decl context here. 60e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson // Right now we do it because the implicit Obj-C decls don't have one. 61e0047b13f0025fa1588f1b776592ed3458b226d6Anders Carlsson if (RD->getDeclContext()) 62e0047b13f0025fa1588f1b776592ed3458b226d6Anders Carlsson OS << RD->getQualifiedNameAsString(); 63e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson else 64e0047b13f0025fa1588f1b776592ed3458b226d6Anders Carlsson RD->printName(OS); 65e0047b13f0025fa1588f1b776592ed3458b226d6Anders Carlsson } else if (const TypedefNameDecl *TDD = RD->getTypedefNameForAnonDecl()) { 66e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson // FIXME: We should not have to check for a null decl context here. 67e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson // Right now we do it because the implicit Obj-C decls don't have one. 68e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson if (TDD->getDeclContext()) 69e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson OS << TDD->getQualifiedNameAsString(); 70e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson else 71e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson TDD->printName(OS); 72e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson } else 73e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson OS << "anon"; 74e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson 75e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson if (!suffix.empty()) 76e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson OS << suffix; 77e9742b0f7281d0a21b79e661ec8879e01c4a02e4Anders Carlsson 789cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner Ty->setName(OS.str()); 7930ec9972be5a5af1f7a2277360dfa3aa1540b4faDevang Patel} 8030ec9972be5a5af1f7a2277360dfa3aa1540b4faDevang Patel 814581fff8af09a156a9dcc4de62587385c5da9574Chris Lattner/// ConvertTypeForMem - Convert type T into a llvm::Type. This differs from 824581fff8af09a156a9dcc4de62587385c5da9574Chris Lattner/// ConvertType in that it is used to convert to the memory representation for 834581fff8af09a156a9dcc4de62587385c5da9574Chris Lattner/// a type. For example, the scalar representation for _Bool is i1, but the 844581fff8af09a156a9dcc4de62587385c5da9574Chris Lattner/// memory representation is usually i8 or i32, depending on the target. 859cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattnerllvm::Type *CodeGenTypes::ConvertTypeForMem(QualType T){ 869cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *R = ConvertType(T); 871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8819009e6fe7e0f51d2e49f4c94928a048c11c5281Chris Lattner // If this is a non-bool type, don't map it. 89f177d9d6c27fbbcee8c00fd90b8306985c03c54aDuncan Sands if (!R->isIntegerTy(1)) 9019009e6fe7e0f51d2e49f4c94928a048c11c5281Chris Lattner return R; 911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9219009e6fe7e0f51d2e49f4c94928a048c11c5281Chris Lattner // Otherwise, return an integer of the target-specified size. 930032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::IntegerType::get(getLLVMContext(), 940032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson (unsigned)Context.getTypeSize(T)); 951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9619009e6fe7e0f51d2e49f4c94928a048c11c5281Chris Lattner} 9719009e6fe7e0f51d2e49f4c94928a048c11c5281Chris Lattner 98f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// isFuncTypeArgumentConvertible - Return true if the specified type in a 99f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// function argument or result position can be converted to an IR type at this 100f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// point. This boils down to being whether it is complete, as well as whether 101f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// we've temporarily deferred expanding the type because we're in a recursive 102f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// context. 103f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattnerbool CodeGenTypes::isFuncTypeArgumentConvertible(QualType Ty){ 104f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // If this isn't a tagged type, we can convert it! 105f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner const TagType *TT = Ty->getAs<TagType>(); 106f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (TT == 0) return true; 107f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 108f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 109f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // If it's a tagged type, but is a forward decl, we can't convert it. 110f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (!TT->getDecl()->isDefinition()) 111f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner return false; 112f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 113f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // If we're not under a pointer under a struct, then we can convert it if 114f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // needed. 115f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (RecursionState != RS_StructPointer) 116f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner return true; 117f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 118f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // If this is an enum, then it is safe to convert. 119f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner const RecordType *RT = dyn_cast<RecordType>(TT); 120f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (RT == 0) return true; 121f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 122f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // Otherwise, we have to be careful. If it is a struct that we're in the 123f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // process of expanding, then we can't convert the function type. That's ok 124f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // though because we must be in a pointer context under the struct, so we can 125f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // just convert it to a dummy type. 126f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // 127f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // We decide this by checking whether ConvertRecordDeclType returns us an 128f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // opaque type for a struct that we know is defined. 129f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner return !ConvertRecordDeclType(RT->getDecl())->isOpaque(); 130f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner} 131f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 132f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 133f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// Code to verify a given function type is complete, i.e. the return type 134f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// and all of the argument types are complete. Also check to see if we are in 135f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// a RS_StructPointer context, and if so whether any struct types have been 136f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// pended. If so, we don't want to ask the ABI lowering code to handle a type 137f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// that cannot be converted to an IR type. 138f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattnerbool CodeGenTypes::isFuncTypeConvertible(const FunctionType *FT) { 139f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (!isFuncTypeArgumentConvertible(FT->getResultType())) 140f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner return false; 141f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 142f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT)) 1439cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner for (unsigned i = 0, e = FPT->getNumArgs(); i != e; i++) 144f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (!isFuncTypeArgumentConvertible(FPT->getArgType(i))) 145f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner return false; 146f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 147f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner return true; 148b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman} 149b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman 150c5b8806cda286cf41866176ef98011fdaa68da01Chris Lattner/// UpdateCompletedType - When we find the full definition for a TagDecl, 151c5b8806cda286cf41866176ef98011fdaa68da01Chris Lattner/// replace the 'opaque' type we previously made for it if applicable. 152c5b8806cda286cf41866176ef98011fdaa68da01Chris Lattnervoid CodeGenTypes::UpdateCompletedType(const TagDecl *TD) { 1539cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If this is an enum being completed, then we flush all non-struct types from 1549cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // the cache. This allows function types and other things that may be derived 1559cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // from the enum to be recomputed. 1568dd5cdfc462026648b480adaf774e24bc620f7c3Chris Lattner if (const EnumDecl *ED = dyn_cast<EnumDecl>(TD)) { 1578dd5cdfc462026648b480adaf774e24bc620f7c3Chris Lattner // Only flush the cache if we've actually already converted this type. 1588dd5cdfc462026648b480adaf774e24bc620f7c3Chris Lattner if (TypeCache.count(ED->getTypeForDecl())) 1598dd5cdfc462026648b480adaf774e24bc620f7c3Chris Lattner TypeCache.clear(); 1609cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return; 161b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman } 1629cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 163f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // If we completed a RecordDecl that we previously used and converted to an 164f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // anonymous type, then go ahead and complete it now. 1659cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const RecordDecl *RD = cast<RecordDecl>(TD); 166f0a8679b6e6635117533b89894646f1450cea25bChris Lattner if (RD->isDependentType()) return; 167f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 168f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // Only complete it if we converted it already. If we haven't converted it 169f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // yet, we'll just do it lazily. 170f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // if (RecordDeclTypes.count(Context.getTagDeclType(RD).getTypePtr())) 1719cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ConvertRecordDeclType(RD); 172d86e6bc7ab4388a578daf46e7c76be9122a25072Chris Lattner} 173d86e6bc7ab4388a578daf46e7c76be9122a25072Chris Lattner 1749cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattnerstatic llvm::Type *getTypeForFormat(llvm::LLVMContext &VMContext, 1759cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const llvm::fltSemantics &format) { 176b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner if (&format == &llvm::APFloat::IEEEsingle) 1770032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::Type::getFloatTy(VMContext); 178b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner if (&format == &llvm::APFloat::IEEEdouble) 1790032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::Type::getDoubleTy(VMContext); 180b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner if (&format == &llvm::APFloat::IEEEquad) 1810032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::Type::getFP128Ty(VMContext); 182b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner if (&format == &llvm::APFloat::PPCDoubleDouble) 1830032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::Type::getPPC_FP128Ty(VMContext); 184b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner if (&format == &llvm::APFloat::x87DoubleExtended) 1850032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::Type::getX86_FP80Ty(VMContext); 186b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner assert(0 && "Unknown float format!"); 187f6a943e047f541619a2202f9e43b20b3d7c0a96dEli Friedman return 0; 188f6a943e047f541619a2202f9e43b20b3d7c0a96dEli Friedman} 189f6a943e047f541619a2202f9e43b20b3d7c0a96dEli Friedman 1909cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner/// ConvertType - Convert the specified type to its LLVM form. 1919cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattnerllvm::Type *CodeGenTypes::ConvertType(QualType T) { 1929cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner T = Context.getCanonicalType(T); 1939cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 1949cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const Type *Ty = T.getTypePtr(); 1951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1969cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // RecordTypes are cached and processed specially. 1979cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (const RecordType *RT = dyn_cast<RecordType>(Ty)) 1989cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return ConvertRecordDeclType(RT->getDecl()); 1999cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 2009cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // See if type is already cached. 2019cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::DenseMap<const Type *, llvm::Type *>::iterator TCI = TypeCache.find(Ty); 2029cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If type is found in map then use it. Otherwise, convert type T. 2039cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (TCI != TypeCache.end()) 2049cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return TCI->second; 2059cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 2069cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If we don't have it in the cache, convert it now. 2079cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *ResultType = 0; 2089cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner switch (Ty->getTypeClass()) { 2099cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner case Type::Record: // Handled above. 21072564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor#define TYPE(Class, Base) 21172564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor#define ABSTRACT_TYPE(Class, Base) 21272564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 21372564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor#define DEPENDENT_TYPE(Class, Base) case Type::Class: 214ad5e73887052193afda72db8efcb812bd083a4a8John McCall#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 21572564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor#include "clang/AST/TypeNodes.def" 216864c041e118155c2b1ce0ba36942a3da5a4a055eJohn McCall llvm_unreachable("Non-canonical or dependent types aren't possible."); 21772564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor break; 21872564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor 2195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Type::Builtin: { 2209cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner switch (cast<BuiltinType>(Ty)->getKind()) { 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::Void: 222de2e22d33afec98324a66a358dfe0951b3c7259aSteve Naroff case BuiltinType::ObjCId: 223de2e22d33afec98324a66a358dfe0951b3c7259aSteve Naroff case BuiltinType::ObjCClass: 22413dcd00615de5c4279d97bdf63cd5f0a14fd9dccFariborz Jahanian case BuiltinType::ObjCSel: 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // LLVM void type can only be used as the result of a function call. Just 2265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // map to the same as char. 2279cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::Type::getInt8Ty(getLLVMContext()); 2289cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 2295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::Bool: 23119009e6fe7e0f51d2e49f4c94928a048c11c5281Chris Lattner // Note that we always return bool as i1 for use as a scalar type. 2329cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::Type::getInt1Ty(getLLVMContext()); 2339cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 2341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 235d2d2a11a91d7ddf468bfb70f66362d24806ed601Chris Lattner case BuiltinType::Char_S: 236d2d2a11a91d7ddf468bfb70f66362d24806ed601Chris Lattner case BuiltinType::Char_U: 237d2d2a11a91d7ddf468bfb70f66362d24806ed601Chris Lattner case BuiltinType::SChar: 238d2d2a11a91d7ddf468bfb70f66362d24806ed601Chris Lattner case BuiltinType::UChar: 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::Short: 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::UShort: 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::Int: 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::UInt: 2435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::Long: 2445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::ULong: 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::LongLong: 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::ULongLong: 2473f59c975aa5d047f7edd1b900b5e885c38af0ef7Chris Lattner case BuiltinType::WChar_S: 2483f59c975aa5d047f7edd1b900b5e885c38af0ef7Chris Lattner case BuiltinType::WChar_U: 249f5c209d23b20ada4a9b6235db50317239cbf6ae1Alisdair Meredith case BuiltinType::Char16: 250f5c209d23b20ada4a9b6235db50317239cbf6ae1Alisdair Meredith case BuiltinType::Char32: 2519cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::IntegerType::get(getLLVMContext(), 2529cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner static_cast<unsigned>(Context.getTypeSize(T))); 2539cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 2541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 255f6a943e047f541619a2202f9e43b20b3d7c0a96dEli Friedman case BuiltinType::Float: 256c8b1227fa8c17d9881815e40c04e19334be536f8Nate Begeman case BuiltinType::Double: 2575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::LongDouble: 2589cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = getTypeForFormat(getLLVMContext(), 2599cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner Context.getFloatTypeSemantics(T)); 2609cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 2611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2629cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner case BuiltinType::NullPtr: 263c1eb14a66fdd955aff3f957a5843295f27952bddAnders Carlsson // Model std::nullptr_t as i8* 2649cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::Type::getInt8PtrTy(getLLVMContext()); 2659cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 266c1eb14a66fdd955aff3f957a5843295f27952bddAnders Carlsson 2672df9ced9fd1e8c7d7b38443db07e0e811de22571Chris Lattner case BuiltinType::UInt128: 2682df9ced9fd1e8c7d7b38443db07e0e811de22571Chris Lattner case BuiltinType::Int128: 2699cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::IntegerType::get(getLLVMContext(), 128); 2709cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 2718c69235d21dfb067efb530a8cf1f35d633394270Eli Friedman 2728c69235d21dfb067efb530a8cf1f35d633394270Eli Friedman case BuiltinType::Overload: 2738c69235d21dfb067efb530a8cf1f35d633394270Eli Friedman case BuiltinType::Dependent: 274864c041e118155c2b1ce0ba36942a3da5a4a055eJohn McCall case BuiltinType::BoundMember: 2751de4d4e8cb2e9c88809fea8092bc6e835a5473d2John McCall case BuiltinType::UnknownAny: 276864c041e118155c2b1ce0ba36942a3da5a4a055eJohn McCall llvm_unreachable("Unexpected placeholder builtin type!"); 2778c69235d21dfb067efb530a8cf1f35d633394270Eli Friedman break; 2785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Type::Complex: { 2821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::Type *EltTy = 2839cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ConvertType(cast<ComplexType>(Ty)->getElementType()); 2849cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::StructType::get(EltTy, EltTy, NULL); 2859cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 2865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2877c80bd64032e610c0dbd74fc0ef6ea334447f2fdSebastian Redl case Type::LValueReference: 2887c80bd64032e610c0dbd74fc0ef6ea334447f2fdSebastian Redl case Type::RValueReference: { 2899cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner RecursionStatePointerRAII X(RecursionState); 2909cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const ReferenceType *RTy = cast<ReferenceType>(Ty); 2919cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner QualType ETy = RTy->getPointeeType(); 2929cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *PointeeType = ConvertTypeForMem(ETy); 293207f4d8543529221932af82836016a2ef066c917Peter Collingbourne unsigned AS = Context.getTargetAddressSpace(ETy); 2949cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::PointerType::get(PointeeType, AS); 2959cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 2966aeae7fa9cfaacba3a4077d62c01c2531d88a63eDaniel Dunbar } 2975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Type::Pointer: { 2989cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner RecursionStatePointerRAII X(RecursionState); 2999cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const PointerType *PTy = cast<PointerType>(Ty); 3009cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner QualType ETy = PTy->getPointeeType(); 3019cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *PointeeType = ConvertTypeForMem(ETy); 3029cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (PointeeType->isVoidTy()) 3039cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner PointeeType = llvm::Type::getInt8Ty(getLLVMContext()); 304207f4d8543529221932af82836016a2ef066c917Peter Collingbourne unsigned AS = Context.getTargetAddressSpace(ETy); 3059cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::PointerType::get(PointeeType, AS); 3069cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 3075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 309fb22d96692c5240fb8d611290dbf7eeed3759c73Steve Naroff case Type::VariableArray: { 3109cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const VariableArrayType *A = cast<VariableArrayType>(Ty); 3119cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner assert(A->getIndexTypeCVRQualifiers() == 0 && 3125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "FIXME: We only handle trivial array types so far!"); 313c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman // VLAs resolve to the innermost element type; this matches 314c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman // the return of alloca, and there isn't any obviously better choice. 3159cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = ConvertTypeForMem(A->getElementType()); 3169cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 317c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman } 318c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman case Type::IncompleteArray: { 3199cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const IncompleteArrayType *A = cast<IncompleteArrayType>(Ty); 3209cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner assert(A->getIndexTypeCVRQualifiers() == 0 && 321c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman "FIXME: We only handle trivial array types so far!"); 322c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman // int X[] -> [0 x int] 3239cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::ArrayType::get(ConvertTypeForMem(A->getElementType()),0); 3249cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 3255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 326fb22d96692c5240fb8d611290dbf7eeed3759c73Steve Naroff case Type::ConstantArray: { 3279cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const ConstantArrayType *A = cast<ConstantArrayType>(Ty); 3289cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const llvm::Type *EltTy = ConvertTypeForMem(A->getElementType()); 3299cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::ArrayType::get(EltTy, A->getSize().getZExtValue()); 3309cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 331fb22d96692c5240fb8d611290dbf7eeed3759c73Steve Naroff } 332213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begeman case Type::ExtVector: 3335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Type::Vector: { 3349cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const VectorType *VT = cast<VectorType>(Ty); 3359cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::VectorType::get(ConvertType(VT->getElementType()), 3369cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner VT->getNumElements()); 3379cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 3385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Type::FunctionNoProto: 340bb36d331f439f49859efcfb4435c61762fbba6f9Daniel Dunbar case Type::FunctionProto: { 341bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner // First, check whether we can build the full function type. If the 342bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner // function type depends on an incomplete type (e.g. a struct or enum), we 3439cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // cannot lower the function type. 344f0a8679b6e6635117533b89894646f1450cea25bChris Lattner if (RecursionState == RS_StructPointer || 345f0a8679b6e6635117533b89894646f1450cea25bChris Lattner !isFuncTypeConvertible(cast<FunctionType>(Ty))) { 3469cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // This function's type depends on an incomplete tag type. 3479cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // Return a placeholder type. 3489cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::StructType::get(getLLVMContext()); 34957eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner 35057eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner SkippedLayout |= RecursionState == RS_StructPointer; 3519cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 352b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman } 3539cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 354f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // While we're converting the argument types for a function, we don't want 355f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // to recursively convert any pointed-to structs. Converting directly-used 356f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // structs is ok though. 357f0a8679b6e6635117533b89894646f1450cea25bChris Lattner RecursionStateTy SavedRecursionState = RecursionState; 358f0a8679b6e6635117533b89894646f1450cea25bChris Lattner RecursionState = RS_Struct; 359f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 360b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman // The function type can be built; call the appropriate routines to 361b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman // build it. 362bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner const CGFunctionInfo *FI; 363bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner bool isVariadic; 3649cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(Ty)) { 365bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner FI = &getFunctionInfo( 3669cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner CanQual<FunctionProtoType>::CreateUnsafe(QualType(FPT, 0))); 367bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner isVariadic = FPT->isVariadic(); 368bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner } else { 3699cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const FunctionNoProtoType *FNPT = cast<FunctionNoProtoType>(Ty); 370bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner FI = &getFunctionInfo( 3719cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner CanQual<FunctionNoProtoType>::CreateUnsafe(QualType(FNPT, 0))); 372bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner isVariadic = true; 373bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner } 374f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 3759cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = GetFunctionType(*FI, isVariadic); 376f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 377f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // Restore our recursion state. 378f0a8679b6e6635117533b89894646f1450cea25bChris Lattner RecursionState = SavedRecursionState; 37957eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner 38057eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner if (SkippedLayout) 38157eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner TypeCache.clear(); 382f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 383f0a8679b6e6635117533b89894646f1450cea25bChris Lattner if (RecursionState == RS_Normal) 384f0a8679b6e6635117533b89894646f1450cea25bChris Lattner while (!DeferredRecords.empty()) 385f0a8679b6e6635117533b89894646f1450cea25bChris Lattner ConvertRecordDeclType(DeferredRecords.pop_back_val()); 3869cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 387bb36d331f439f49859efcfb4435c61762fbba6f9Daniel Dunbar } 3881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 389c12c5bba6ceb6acd4e51e7a0fc03257da9cfd44eJohn McCall case Type::ObjCObject: 3909cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = ConvertType(cast<ObjCObjectType>(Ty)->getBaseType()); 3919cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 392c12c5bba6ceb6acd4e51e7a0fc03257da9cfd44eJohn McCall 393391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner case Type::ObjCInterface: { 394412f59b23fc502b199b9ca96c72ef5d5ad21d62bDaniel Dunbar // Objective-C interfaces are always opaque (outside of the 395412f59b23fc502b199b9ca96c72ef5d5ad21d62bDaniel Dunbar // runtime, which can do whatever it likes); we never refine 396412f59b23fc502b199b9ca96c72ef5d5ad21d62bDaniel Dunbar // these. 3979cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *&T = InterfaceTypes[cast<ObjCInterfaceType>(Ty)]; 398412f59b23fc502b199b9ca96c72ef5d5ad21d62bDaniel Dunbar if (!T) 3999cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner T = llvm::StructType::createNamed(getLLVMContext(), ""); 4009cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = T; 4019cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 402391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner } 4031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 40414108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff case Type::ObjCObjectPointer: { 4059cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner RecursionStatePointerRAII X(RecursionState); 40628e478010eb4d789da85c6378dbfa9d66b95830bDaniel Dunbar // Protocol qualifications do not influence the LLVM type, we just return a 40728e478010eb4d789da85c6378dbfa9d66b95830bDaniel Dunbar // pointer to the underlying interface type. We don't need to worry about 40828e478010eb4d789da85c6378dbfa9d66b95830bDaniel Dunbar // recursive conversion. 4091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::Type *T = 4109cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ConvertType(cast<ObjCObjectPointerType>(Ty)->getPointeeType()); 4119cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = T->getPointerTo(); 4129cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 41314108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff } 41428e478010eb4d789da85c6378dbfa9d66b95830bDaniel Dunbar 4159cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner case Type::Enum: { 4169cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const EnumDecl *ED = cast<EnumType>(Ty)->getDecl(); 4179cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (ED->isDefinition() || ED->isFixed()) 4189cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return ConvertType(ED->getIntegerType()); 4199cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // Return a placeholder '{}' type. 4209cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::StructType::get(getLLVMContext()); 4219cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 422de0efb3b6eac36bdeae0e60f753a974cc4118a31Chris Lattner } 4239048891ff983d0681c116c6e8f1073aa31bdd6e8Daniel Dunbar 4249048891ff983d0681c116c6e8f1073aa31bdd6e8Daniel Dunbar case Type::BlockPointer: { 4259cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner RecursionStatePointerRAII X(RecursionState); 4269cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const QualType FTy = cast<BlockPointerType>(Ty)->getPointeeType(); 4279cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *PointeeType = ConvertTypeForMem(FTy); 428207f4d8543529221932af82836016a2ef066c917Peter Collingbourne unsigned AS = Context.getTargetAddressSpace(FTy); 4299cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::PointerType::get(PointeeType, AS); 4309cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 4319048891ff983d0681c116c6e8f1073aa31bdd6e8Daniel Dunbar } 432424c51d3d4bea87291919b75e73ca59386702ad5Sebastian Redl 4330e650017acdbbeb0c590e77bbea88c200ea1caefAnders Carlsson case Type::MemberPointer: { 4349cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = 4359cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner getCXXABI().ConvertMemberPointerType(cast<MemberPointerType>(Ty)); 4369cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 4370e650017acdbbeb0c590e77bbea88c200ea1caefAnders Carlsson } 4385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4399cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 4409cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner assert(ResultType && "Didn't convert a type?"); 4419cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 4429cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner TypeCache[Ty] = ResultType; 4439cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return ResultType; 4445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4469cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner/// ConvertRecordDeclType - Lay out a tagged decl type like struct or union. 4479cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattnerllvm::StructType *CodeGenTypes::ConvertRecordDeclType(const RecordDecl *RD) { 448efb6d0dc3eafbcf4f8cd053138bd1abed1dda8d4Daniel Dunbar // TagDecl's are not necessarily unique, instead use the (clang) 449efb6d0dc3eafbcf4f8cd053138bd1abed1dda8d4Daniel Dunbar // type connected to the decl. 4509cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const Type *Key = Context.getTagDeclType(RD).getTypePtr(); 4511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4529cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::StructType *&Entry = RecordDeclTypes[Key]; 4531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4549cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If we don't have a StructType at all yet, create the forward declaration. 4559cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (Entry == 0) 4569cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner Entry = llvm::StructType::createNamed(getLLVMContext(), 4579cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner std::string(RD->getKindName()) + "." + 4589cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner RD->getQualifiedNameAsString()); 4599cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::StructType *Ty = Entry; 4605de00fcf7c923a14bb79bdbaabb2faeb5633d85aChris Lattner 4619cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If this is still a forward declaration, or the LLVM type is already 4629cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // complete, there's nothing more to do. 4639cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (!RD->isDefinition() || !Ty->isOpaque()) 4649cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return Ty; 4659cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 4669cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If we're recursively nested inside the conversion of a pointer inside the 4679cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // struct, defer conversion. 4689cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (RecursionState == RS_StructPointer) { 4699cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner DeferredRecords.push_back(RD); 4709cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return Ty; 4719cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner } 4721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4739cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // Okay, this is a definition of a type. Compile the implementation now. 4749cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner RecursionStateTy SavedRecursionState = RecursionState; 4759cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner RecursionState = RS_Struct; 476ae287239879386b9abf6da50a67bbb7fe81897f1Daniel Dunbar 47786ff308724171494395a840fd2efbe25e62f352eJohn McCall // Force conversion of non-virtual base classes recursively. 4789cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (const CXXRecordDecl *CRD = dyn_cast<CXXRecordDecl>(RD)) { 4799cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner for (CXXRecordDecl::base_class_const_iterator i = CRD->bases_begin(), 4809cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner e = CRD->bases_end(); i != e; ++i) { 48186ff308724171494395a840fd2efbe25e62f352eJohn McCall if (!i->isVirtual()) { 48286ff308724171494395a840fd2efbe25e62f352eJohn McCall const CXXRecordDecl *Base = 48386ff308724171494395a840fd2efbe25e62f352eJohn McCall cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); 4849cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ConvertRecordDeclType(Base); 48586ff308724171494395a840fd2efbe25e62f352eJohn McCall } 48686ff308724171494395a840fd2efbe25e62f352eJohn McCall } 48786ff308724171494395a840fd2efbe25e62f352eJohn McCall } 48886ff308724171494395a840fd2efbe25e62f352eJohn McCall 489696798febaf1f69020cdf7474b91e71736c5aa69Anders Carlsson // Layout fields. 4909cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner CGRecordLayout *Layout = ComputeRecordLayout(RD, Ty); 491696798febaf1f69020cdf7474b91e71736c5aa69Anders Carlsson CGRecordLayouts[Key] = Layout; 4921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 493f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // If this struct blocked a FunctionType conversion, then recompute whatever 494f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // was derived from that. 495f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // FIXME: This is hugely overconservative. 49657eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner if (SkippedLayout) 49757eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner TypeCache.clear(); 498f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 4999cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 5009cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // Restore our recursion state. If we're done converting the outer-most 5019cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // record, then convert any deferred structs as well. 5029cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner RecursionState = SavedRecursionState; 503f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 5049cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (RecursionState == RS_Normal) 5059cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner while (!DeferredRecords.empty()) 5069cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ConvertRecordDeclType(DeferredRecords.pop_back_val()); 5079cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 5089cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return Ty; 5091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 510fc3b8e9c1381d5e6ec361591d649c56a870ff971Chris Lattner 5112d987772c2ba3bff93b9fbe7b73bf06eed2b1607Anders Carlsson/// getCGRecordLayout - Return record layout info for the given record decl. 512ad3e7118c40711faf5f51f08d599dbd525d3408aAnders Carlssonconst CGRecordLayout & 5132d987772c2ba3bff93b9fbe7b73bf06eed2b1607Anders CarlssonCodeGenTypes::getCGRecordLayout(const RecordDecl *RD) { 5142d987772c2ba3bff93b9fbe7b73bf06eed2b1607Anders Carlsson const Type *Key = Context.getTagDeclType(RD).getTypePtr(); 51582926963cccbc54bc707d5dcf79389166046ef08Anders Carlsson 516270e203b50ed8791e61afd357596bcf050cf2bfdDaniel Dunbar const CGRecordLayout *Layout = CGRecordLayouts.lookup(Key); 517c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson if (!Layout) { 5182d987772c2ba3bff93b9fbe7b73bf06eed2b1607Anders Carlsson // Compute the type information. 5199cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ConvertRecordDeclType(RD); 520c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson 521c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson // Now try again. 522c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson Layout = CGRecordLayouts.lookup(Key); 523c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson } 524c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson 525270e203b50ed8791e61afd357596bcf050cf2bfdDaniel Dunbar assert(Layout && "Unable to find record layout information for type"); 526270e203b50ed8791e61afd357596bcf050cf2bfdDaniel Dunbar return *Layout; 527b84a06e68ffd71da22e3c75b6e4bbdba37816413Devang Patel} 5283e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson 529f16aa103d3afd42fbca2ab346f191bf745cec092John McCallbool CodeGenTypes::isZeroInitializable(QualType T) { 5303e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson // No need to check for member pointers when not compiling C++. 5313e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson if (!Context.getLangOptions().CPlusPlus) 532f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return true; 5333e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson 5343e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson T = Context.getBaseElementType(T); 5353e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson 536f16aa103d3afd42fbca2ab346f191bf745cec092John McCall // Records are non-zero-initializable if they contain any 537f16aa103d3afd42fbca2ab346f191bf745cec092John McCall // non-zero-initializable subobjects. 5383e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson if (const RecordType *RT = T->getAs<RecordType>()) { 5393e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson const CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 540f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return isZeroInitializable(RD); 5413e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson } 542f16aa103d3afd42fbca2ab346f191bf745cec092John McCall 543f16aa103d3afd42fbca2ab346f191bf745cec092John McCall // We have to ask the ABI about member pointers. 5443e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson if (const MemberPointerType *MPT = T->getAs<MemberPointerType>()) 545f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return getCXXABI().isZeroInitializable(MPT); 5463e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson 547f16aa103d3afd42fbca2ab346f191bf745cec092John McCall // Everything else is okay. 548f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return true; 5493e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson} 550c39211d2aef5b8ca2bc69c9fb81ca3dfb3711eb0Anders Carlsson 551f16aa103d3afd42fbca2ab346f191bf745cec092John McCallbool CodeGenTypes::isZeroInitializable(const CXXRecordDecl *RD) { 5523379e9bd71c0e0051bd97e90d4f2ec964078091dAnders Carlsson return getCGRecordLayout(RD).isZeroInitializable(); 553c39211d2aef5b8ca2bc69c9fb81ca3dfb3711eb0Anders Carlsson} 554