CodeGenTypes.cpp revision 2045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6
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)); 9519009e6fe7e0f51d2e49f4c94928a048c11c5281Chris Lattner} 9619009e6fe7e0f51d2e49f4c94928a048c11c5281Chris Lattner 97f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// isFuncTypeArgumentConvertible - Return true if the specified type in a 98f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// function argument or result position can be converted to an IR type at this 99f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// point. This boils down to being whether it is complete, as well as whether 100f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// we've temporarily deferred expanding the type because we're in a recursive 101f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// context. 102f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattnerbool CodeGenTypes::isFuncTypeArgumentConvertible(QualType Ty){ 103f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // If this isn't a tagged type, we can convert it! 104f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner const TagType *TT = Ty->getAs<TagType>(); 105f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (TT == 0) return true; 106f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 107f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 108f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // If it's a tagged type, but is a forward decl, we can't convert it. 109f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (!TT->getDecl()->isDefinition()) 110f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner return false; 111f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 112f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // If we're not under a pointer under a struct, then we can convert it if 113f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // needed. 114f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (RecursionState != RS_StructPointer) 115f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner return true; 116f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 117f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // If this is an enum, then it is safe to convert. 118f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner const RecordType *RT = dyn_cast<RecordType>(TT); 119f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (RT == 0) return true; 120f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 121f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // Otherwise, we have to be careful. If it is a struct that we're in the 122f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // process of expanding, then we can't convert the function type. That's ok 123f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // though because we must be in a pointer context under the struct, so we can 124f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // just convert it to a dummy type. 125f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // 126f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // We decide this by checking whether ConvertRecordDeclType returns us an 127f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner // opaque type for a struct that we know is defined. 128f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner return !ConvertRecordDeclType(RT->getDecl())->isOpaque(); 129f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner} 130f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 131f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 132f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// Code to verify a given function type is complete, i.e. the return type 133f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// and all of the argument types are complete. Also check to see if we are in 134f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// a RS_StructPointer context, and if so whether any struct types have been 135f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// pended. If so, we don't want to ask the ABI lowering code to handle a type 136f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner/// that cannot be converted to an IR type. 137f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattnerbool CodeGenTypes::isFuncTypeConvertible(const FunctionType *FT) { 138f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (!isFuncTypeArgumentConvertible(FT->getResultType())) 139f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner return false; 140f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 141f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT)) 1429cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner for (unsigned i = 0, e = FPT->getNumArgs(); i != e; i++) 143f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner if (!isFuncTypeArgumentConvertible(FPT->getArgType(i))) 144f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner return false; 145f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner 146f742eb0196e1b25c0b71e91da4a2b856d16a1dabChris Lattner return true; 147b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman} 148b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman 149c5b8806cda286cf41866176ef98011fdaa68da01Chris Lattner/// UpdateCompletedType - When we find the full definition for a TagDecl, 150c5b8806cda286cf41866176ef98011fdaa68da01Chris Lattner/// replace the 'opaque' type we previously made for it if applicable. 151c5b8806cda286cf41866176ef98011fdaa68da01Chris Lattnervoid CodeGenTypes::UpdateCompletedType(const TagDecl *TD) { 1529cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If this is an enum being completed, then we flush all non-struct types from 1539cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // the cache. This allows function types and other things that may be derived 1549cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // from the enum to be recomputed. 1558dd5cdfc462026648b480adaf774e24bc620f7c3Chris Lattner if (const EnumDecl *ED = dyn_cast<EnumDecl>(TD)) { 1568dd5cdfc462026648b480adaf774e24bc620f7c3Chris Lattner // Only flush the cache if we've actually already converted this type. 1572045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner if (TypeCache.count(ED->getTypeForDecl())) { 1582045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner // Okay, we formed some types based on this. We speculated that the enum 1592045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner // would be lowered to i32, so we only need to flush the cache if this 1602045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner // didn't happen. 1612045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner if (!ConvertType(ED->getIntegerType())->isIntegerTy(32)) 1622045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner TypeCache.clear(); 1632045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner } 1649cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return; 165b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman } 1669cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 167f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // If we completed a RecordDecl that we previously used and converted to an 168f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // anonymous type, then go ahead and complete it now. 1699cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const RecordDecl *RD = cast<RecordDecl>(TD); 170f0a8679b6e6635117533b89894646f1450cea25bChris Lattner if (RD->isDependentType()) return; 171f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 172f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // Only complete it if we converted it already. If we haven't converted it 173f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // yet, we'll just do it lazily. 1743ade97504790bbc5a148baa5b3f7e577aed9c1c6Chris Lattner if (RecordDeclTypes.count(Context.getTagDeclType(RD).getTypePtr())) 1759cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ConvertRecordDeclType(RD); 176d86e6bc7ab4388a578daf46e7c76be9122a25072Chris Lattner} 177d86e6bc7ab4388a578daf46e7c76be9122a25072Chris Lattner 1789cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattnerstatic llvm::Type *getTypeForFormat(llvm::LLVMContext &VMContext, 1799cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const llvm::fltSemantics &format) { 180b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner if (&format == &llvm::APFloat::IEEEsingle) 1810032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::Type::getFloatTy(VMContext); 182b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner if (&format == &llvm::APFloat::IEEEdouble) 1830032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::Type::getDoubleTy(VMContext); 184b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner if (&format == &llvm::APFloat::IEEEquad) 1850032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::Type::getFP128Ty(VMContext); 186b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner if (&format == &llvm::APFloat::PPCDoubleDouble) 1870032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::Type::getPPC_FP128Ty(VMContext); 188b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner if (&format == &llvm::APFloat::x87DoubleExtended) 1890032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson return llvm::Type::getX86_FP80Ty(VMContext); 190b7cfe88e88cb4f46308de89cf3f0c81bfe624128Chris Lattner assert(0 && "Unknown float format!"); 191f6a943e047f541619a2202f9e43b20b3d7c0a96dEli Friedman return 0; 192f6a943e047f541619a2202f9e43b20b3d7c0a96dEli Friedman} 193f6a943e047f541619a2202f9e43b20b3d7c0a96dEli Friedman 1949cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner/// ConvertType - Convert the specified type to its LLVM form. 1959cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattnerllvm::Type *CodeGenTypes::ConvertType(QualType T) { 1969cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner T = Context.getCanonicalType(T); 1979cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 1989cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const Type *Ty = T.getTypePtr(); 1991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2009cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // RecordTypes are cached and processed specially. 2019cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (const RecordType *RT = dyn_cast<RecordType>(Ty)) 2029cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return ConvertRecordDeclType(RT->getDecl()); 2039cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 2049cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // See if type is already cached. 2059cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::DenseMap<const Type *, llvm::Type *>::iterator TCI = TypeCache.find(Ty); 2069cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If type is found in map then use it. Otherwise, convert type T. 2079cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (TCI != TypeCache.end()) 2089cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return TCI->second; 2099cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 2109cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If we don't have it in the cache, convert it now. 2119cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *ResultType = 0; 2129cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner switch (Ty->getTypeClass()) { 2139cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner case Type::Record: // Handled above. 21472564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor#define TYPE(Class, Base) 21572564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor#define ABSTRACT_TYPE(Class, Base) 21672564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 21772564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor#define DEPENDENT_TYPE(Class, Base) case Type::Class: 218ad5e73887052193afda72db8efcb812bd083a4a8John McCall#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 21972564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor#include "clang/AST/TypeNodes.def" 220864c041e118155c2b1ce0ba36942a3da5a4a055eJohn McCall llvm_unreachable("Non-canonical or dependent types aren't possible."); 22172564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor break; 22272564e73277e29f6db3305d1f27ba408abb7ed88Douglas Gregor 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Type::Builtin: { 2249cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner switch (cast<BuiltinType>(Ty)->getKind()) { 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::Void: 226de2e22d33afec98324a66a358dfe0951b3c7259aSteve Naroff case BuiltinType::ObjCId: 227de2e22d33afec98324a66a358dfe0951b3c7259aSteve Naroff case BuiltinType::ObjCClass: 22813dcd00615de5c4279d97bdf63cd5f0a14fd9dccFariborz Jahanian case BuiltinType::ObjCSel: 2295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // LLVM void type can only be used as the result of a function call. Just 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // map to the same as char. 2319cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::Type::getInt8Ty(getLLVMContext()); 2329cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 2335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::Bool: 23519009e6fe7e0f51d2e49f4c94928a048c11c5281Chris Lattner // Note that we always return bool as i1 for use as a scalar type. 2369cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::Type::getInt1Ty(getLLVMContext()); 2379cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 2381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 239d2d2a11a91d7ddf468bfb70f66362d24806ed601Chris Lattner case BuiltinType::Char_S: 240d2d2a11a91d7ddf468bfb70f66362d24806ed601Chris Lattner case BuiltinType::Char_U: 241d2d2a11a91d7ddf468bfb70f66362d24806ed601Chris Lattner case BuiltinType::SChar: 242d2d2a11a91d7ddf468bfb70f66362d24806ed601Chris Lattner case BuiltinType::UChar: 2435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::Short: 2445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::UShort: 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::Int: 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::UInt: 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::Long: 2485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::ULong: 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::LongLong: 2505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::ULongLong: 2513f59c975aa5d047f7edd1b900b5e885c38af0ef7Chris Lattner case BuiltinType::WChar_S: 2523f59c975aa5d047f7edd1b900b5e885c38af0ef7Chris Lattner case BuiltinType::WChar_U: 253f5c209d23b20ada4a9b6235db50317239cbf6ae1Alisdair Meredith case BuiltinType::Char16: 254f5c209d23b20ada4a9b6235db50317239cbf6ae1Alisdair Meredith case BuiltinType::Char32: 2559cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::IntegerType::get(getLLVMContext(), 2569cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner static_cast<unsigned>(Context.getTypeSize(T))); 2579cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 2581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 259f6a943e047f541619a2202f9e43b20b3d7c0a96dEli Friedman case BuiltinType::Float: 260c8b1227fa8c17d9881815e40c04e19334be536f8Nate Begeman case BuiltinType::Double: 2615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BuiltinType::LongDouble: 2629cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = getTypeForFormat(getLLVMContext(), 2639cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner Context.getFloatTypeSemantics(T)); 2649cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 2651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2669cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner case BuiltinType::NullPtr: 267c1eb14a66fdd955aff3f957a5843295f27952bddAnders Carlsson // Model std::nullptr_t as i8* 2689cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::Type::getInt8PtrTy(getLLVMContext()); 2699cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 270c1eb14a66fdd955aff3f957a5843295f27952bddAnders Carlsson 2712df9ced9fd1e8c7d7b38443db07e0e811de22571Chris Lattner case BuiltinType::UInt128: 2722df9ced9fd1e8c7d7b38443db07e0e811de22571Chris Lattner case BuiltinType::Int128: 2739cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::IntegerType::get(getLLVMContext(), 128); 2749cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 2758c69235d21dfb067efb530a8cf1f35d633394270Eli Friedman 2768c69235d21dfb067efb530a8cf1f35d633394270Eli Friedman case BuiltinType::Overload: 2778c69235d21dfb067efb530a8cf1f35d633394270Eli Friedman case BuiltinType::Dependent: 278864c041e118155c2b1ce0ba36942a3da5a4a055eJohn McCall case BuiltinType::BoundMember: 2791de4d4e8cb2e9c88809fea8092bc6e835a5473d2John McCall case BuiltinType::UnknownAny: 280864c041e118155c2b1ce0ba36942a3da5a4a055eJohn McCall llvm_unreachable("Unexpected placeholder builtin type!"); 2818c69235d21dfb067efb530a8cf1f35d633394270Eli Friedman break; 2825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Type::Complex: { 286ef6de3da8572607f786303c07150daa6e140ab19Jay Foad llvm::Type *EltTy = ConvertType(cast<ComplexType>(Ty)->getElementType()); 2879cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::StructType::get(EltTy, EltTy, NULL); 2889cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 2895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2907c80bd64032e610c0dbd74fc0ef6ea334447f2fdSebastian Redl case Type::LValueReference: 2917c80bd64032e610c0dbd74fc0ef6ea334447f2fdSebastian Redl case Type::RValueReference: { 2929cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner RecursionStatePointerRAII X(RecursionState); 2939cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const ReferenceType *RTy = cast<ReferenceType>(Ty); 2949cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner QualType ETy = RTy->getPointeeType(); 2959cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *PointeeType = ConvertTypeForMem(ETy); 296207f4d8543529221932af82836016a2ef066c917Peter Collingbourne unsigned AS = Context.getTargetAddressSpace(ETy); 2979cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::PointerType::get(PointeeType, AS); 2989cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 2996aeae7fa9cfaacba3a4077d62c01c2531d88a63eDaniel Dunbar } 3005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Type::Pointer: { 3019cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner RecursionStatePointerRAII X(RecursionState); 3029cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const PointerType *PTy = cast<PointerType>(Ty); 3039cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner QualType ETy = PTy->getPointeeType(); 3049cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *PointeeType = ConvertTypeForMem(ETy); 3059cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (PointeeType->isVoidTy()) 3069cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner PointeeType = llvm::Type::getInt8Ty(getLLVMContext()); 307207f4d8543529221932af82836016a2ef066c917Peter Collingbourne unsigned AS = Context.getTargetAddressSpace(ETy); 3089cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::PointerType::get(PointeeType, AS); 3099cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 3105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 312fb22d96692c5240fb8d611290dbf7eeed3759c73Steve Naroff case Type::VariableArray: { 3139cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const VariableArrayType *A = cast<VariableArrayType>(Ty); 3149cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner assert(A->getIndexTypeCVRQualifiers() == 0 && 3155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "FIXME: We only handle trivial array types so far!"); 316c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman // VLAs resolve to the innermost element type; this matches 317c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman // the return of alloca, and there isn't any obviously better choice. 3189cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = ConvertTypeForMem(A->getElementType()); 3199cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 320c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman } 321c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman case Type::IncompleteArray: { 3229cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const IncompleteArrayType *A = cast<IncompleteArrayType>(Ty); 3239cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner assert(A->getIndexTypeCVRQualifiers() == 0 && 324c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman "FIXME: We only handle trivial array types so far!"); 3253a2b657088de9413714a51bff153a59565adb3efChris Lattner // int X[] -> [0 x int], unless the element type is not sized. If it is 3263a2b657088de9413714a51bff153a59565adb3efChris Lattner // unsized (e.g. an incomplete struct) just use [0 x i8]. 3273a2b657088de9413714a51bff153a59565adb3efChris Lattner ResultType = ConvertTypeForMem(A->getElementType()); 3283a2b657088de9413714a51bff153a59565adb3efChris Lattner if (!ResultType->isSized()) { 3293a2b657088de9413714a51bff153a59565adb3efChris Lattner SkippedLayout = true; 3303a2b657088de9413714a51bff153a59565adb3efChris Lattner ResultType = llvm::Type::getInt8Ty(getLLVMContext()); 3313a2b657088de9413714a51bff153a59565adb3efChris Lattner } 3323a2b657088de9413714a51bff153a59565adb3efChris Lattner ResultType = llvm::ArrayType::get(ResultType, 0); 3339cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 3345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 335fb22d96692c5240fb8d611290dbf7eeed3759c73Steve Naroff case Type::ConstantArray: { 3369cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const ConstantArrayType *A = cast<ConstantArrayType>(Ty); 3379cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const llvm::Type *EltTy = ConvertTypeForMem(A->getElementType()); 3389cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::ArrayType::get(EltTy, A->getSize().getZExtValue()); 3399cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 340fb22d96692c5240fb8d611290dbf7eeed3759c73Steve Naroff } 341213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begeman case Type::ExtVector: 3425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Type::Vector: { 3439cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const VectorType *VT = cast<VectorType>(Ty); 3449cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::VectorType::get(ConvertType(VT->getElementType()), 3459cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner VT->getNumElements()); 3469cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 3475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Type::FunctionNoProto: 349bb36d331f439f49859efcfb4435c61762fbba6f9Daniel Dunbar case Type::FunctionProto: { 350bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner // First, check whether we can build the full function type. If the 351bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner // function type depends on an incomplete type (e.g. a struct or enum), we 3529cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // cannot lower the function type. 353f0a8679b6e6635117533b89894646f1450cea25bChris Lattner if (RecursionState == RS_StructPointer || 354f0a8679b6e6635117533b89894646f1450cea25bChris Lattner !isFuncTypeConvertible(cast<FunctionType>(Ty))) { 3559cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // This function's type depends on an incomplete tag type. 3569cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // Return a placeholder type. 3579cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::StructType::get(getLLVMContext()); 35857eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner 35957eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner SkippedLayout |= RecursionState == RS_StructPointer; 3609cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 361b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman } 3629cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 363f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // While we're converting the argument types for a function, we don't want 364f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // to recursively convert any pointed-to structs. Converting directly-used 365f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // structs is ok though. 366f0a8679b6e6635117533b89894646f1450cea25bChris Lattner RecursionStateTy SavedRecursionState = RecursionState; 367f0a8679b6e6635117533b89894646f1450cea25bChris Lattner RecursionState = RS_Struct; 368f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 369b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman // The function type can be built; call the appropriate routines to 370b3b6b9b27ab8bdb2a435a5a92ce62e74e3399377Eli Friedman // build it. 371bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner const CGFunctionInfo *FI; 372bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner bool isVariadic; 3739cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(Ty)) { 374bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner FI = &getFunctionInfo( 3759cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner CanQual<FunctionProtoType>::CreateUnsafe(QualType(FPT, 0))); 376bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner isVariadic = FPT->isVariadic(); 377bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner } else { 3789cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const FunctionNoProtoType *FNPT = cast<FunctionNoProtoType>(Ty); 379bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner FI = &getFunctionInfo( 3809cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner CanQual<FunctionNoProtoType>::CreateUnsafe(QualType(FNPT, 0))); 381bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner isVariadic = true; 382bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner } 383f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 3849cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = GetFunctionType(*FI, isVariadic); 385f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 386f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // Restore our recursion state. 387f0a8679b6e6635117533b89894646f1450cea25bChris Lattner RecursionState = SavedRecursionState; 38857eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner 38957eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner if (SkippedLayout) 39057eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner TypeCache.clear(); 391f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 392f0a8679b6e6635117533b89894646f1450cea25bChris Lattner if (RecursionState == RS_Normal) 393f0a8679b6e6635117533b89894646f1450cea25bChris Lattner while (!DeferredRecords.empty()) 394f0a8679b6e6635117533b89894646f1450cea25bChris Lattner ConvertRecordDeclType(DeferredRecords.pop_back_val()); 3959cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 396bb36d331f439f49859efcfb4435c61762fbba6f9Daniel Dunbar } 3971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 398c12c5bba6ceb6acd4e51e7a0fc03257da9cfd44eJohn McCall case Type::ObjCObject: 3999cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = ConvertType(cast<ObjCObjectType>(Ty)->getBaseType()); 4009cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 401c12c5bba6ceb6acd4e51e7a0fc03257da9cfd44eJohn McCall 402391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner case Type::ObjCInterface: { 403412f59b23fc502b199b9ca96c72ef5d5ad21d62bDaniel Dunbar // Objective-C interfaces are always opaque (outside of the 404412f59b23fc502b199b9ca96c72ef5d5ad21d62bDaniel Dunbar // runtime, which can do whatever it likes); we never refine 405412f59b23fc502b199b9ca96c72ef5d5ad21d62bDaniel Dunbar // these. 4069cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *&T = InterfaceTypes[cast<ObjCInterfaceType>(Ty)]; 407412f59b23fc502b199b9ca96c72ef5d5ad21d62bDaniel Dunbar if (!T) 4089cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner T = llvm::StructType::createNamed(getLLVMContext(), ""); 4099cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = T; 4109cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 411391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner } 4121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 41314108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff case Type::ObjCObjectPointer: { 4149cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner RecursionStatePointerRAII X(RecursionState); 41528e478010eb4d789da85c6378dbfa9d66b95830bDaniel Dunbar // Protocol qualifications do not influence the LLVM type, we just return a 41628e478010eb4d789da85c6378dbfa9d66b95830bDaniel Dunbar // pointer to the underlying interface type. We don't need to worry about 41728e478010eb4d789da85c6378dbfa9d66b95830bDaniel Dunbar // recursive conversion. 4181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::Type *T = 4199cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ConvertType(cast<ObjCObjectPointerType>(Ty)->getPointeeType()); 4209cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = T->getPointerTo(); 4219cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 42214108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff } 42328e478010eb4d789da85c6378dbfa9d66b95830bDaniel Dunbar 4242045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner case Type::Enum: { 4259cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const EnumDecl *ED = cast<EnumType>(Ty)->getDecl(); 4269cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (ED->isDefinition() || ED->isFixed()) 4279cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return ConvertType(ED->getIntegerType()); 4282045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner // Return a placeholder 'i32' type. This can be changed later when the 4292045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner // type is defined (see UpdateCompletedType), but is likely to be the 4302045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner // "right" answer. 4312045b2dd6a779e9b35ac42a60cf30a6b07cb4bb6Chris Lattner ResultType = llvm::Type::getInt32Ty(getLLVMContext()); 4329cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 433de0efb3b6eac36bdeae0e60f753a974cc4118a31Chris Lattner } 4349048891ff983d0681c116c6e8f1073aa31bdd6e8Daniel Dunbar 4359048891ff983d0681c116c6e8f1073aa31bdd6e8Daniel Dunbar case Type::BlockPointer: { 4369cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner RecursionStatePointerRAII X(RecursionState); 4379cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const QualType FTy = cast<BlockPointerType>(Ty)->getPointeeType(); 4389cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *PointeeType = ConvertTypeForMem(FTy); 439207f4d8543529221932af82836016a2ef066c917Peter Collingbourne unsigned AS = Context.getTargetAddressSpace(FTy); 4409cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = llvm::PointerType::get(PointeeType, AS); 4419cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 4429048891ff983d0681c116c6e8f1073aa31bdd6e8Daniel Dunbar } 443424c51d3d4bea87291919b75e73ca59386702ad5Sebastian Redl 4440e650017acdbbeb0c590e77bbea88c200ea1caefAnders Carlsson case Type::MemberPointer: { 4459cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ResultType = 4469cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner getCXXABI().ConvertMemberPointerType(cast<MemberPointerType>(Ty)); 4479cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner break; 4480e650017acdbbeb0c590e77bbea88c200ea1caefAnders Carlsson } 4495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4509cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 4519cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner assert(ResultType && "Didn't convert a type?"); 4529cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 4539cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner TypeCache[Ty] = ResultType; 4549cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return ResultType; 4555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4579cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner/// ConvertRecordDeclType - Lay out a tagged decl type like struct or union. 4589cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattnerllvm::StructType *CodeGenTypes::ConvertRecordDeclType(const RecordDecl *RD) { 459efb6d0dc3eafbcf4f8cd053138bd1abed1dda8d4Daniel Dunbar // TagDecl's are not necessarily unique, instead use the (clang) 460efb6d0dc3eafbcf4f8cd053138bd1abed1dda8d4Daniel Dunbar // type connected to the decl. 4619cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner const Type *Key = Context.getTagDeclType(RD).getTypePtr(); 4621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4639cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::StructType *&Entry = RecordDeclTypes[Key]; 4641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4659cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If we don't have a StructType at all yet, create the forward declaration. 466cd87d1e4d1b0097877b0f9c2065900717d2aacbaChris Lattner if (Entry == 0) { 467cd87d1e4d1b0097877b0f9c2065900717d2aacbaChris Lattner Entry = llvm::StructType::createNamed(getLLVMContext(), ""); 468cd87d1e4d1b0097877b0f9c2065900717d2aacbaChris Lattner addRecordTypeName(RD, Entry, ""); 469cd87d1e4d1b0097877b0f9c2065900717d2aacbaChris Lattner } 4709cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::StructType *Ty = Entry; 4715de00fcf7c923a14bb79bdbaabb2faeb5633d85aChris Lattner 4729cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If this is still a forward declaration, or the LLVM type is already 4739cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // complete, there's nothing more to do. 4749cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (!RD->isDefinition() || !Ty->isOpaque()) 4759cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return Ty; 4769cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 4779cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // If we're recursively nested inside the conversion of a pointer inside the 4789cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // struct, defer conversion. 4799cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (RecursionState == RS_StructPointer) { 4809cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner DeferredRecords.push_back(RD); 4819cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return Ty; 4829cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner } 4831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4849cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // Okay, this is a definition of a type. Compile the implementation now. 4859cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner RecursionStateTy SavedRecursionState = RecursionState; 4869cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner RecursionState = RS_Struct; 487ae287239879386b9abf6da50a67bbb7fe81897f1Daniel Dunbar 48886ff308724171494395a840fd2efbe25e62f352eJohn McCall // Force conversion of non-virtual base classes recursively. 4899cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (const CXXRecordDecl *CRD = dyn_cast<CXXRecordDecl>(RD)) { 4909cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner for (CXXRecordDecl::base_class_const_iterator i = CRD->bases_begin(), 4919cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner e = CRD->bases_end(); i != e; ++i) { 49286ff308724171494395a840fd2efbe25e62f352eJohn McCall if (!i->isVirtual()) { 49386ff308724171494395a840fd2efbe25e62f352eJohn McCall const CXXRecordDecl *Base = 49486ff308724171494395a840fd2efbe25e62f352eJohn McCall cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); 4959cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ConvertRecordDeclType(Base); 49686ff308724171494395a840fd2efbe25e62f352eJohn McCall } 49786ff308724171494395a840fd2efbe25e62f352eJohn McCall } 49886ff308724171494395a840fd2efbe25e62f352eJohn McCall } 49986ff308724171494395a840fd2efbe25e62f352eJohn McCall 500696798febaf1f69020cdf7474b91e71736c5aa69Anders Carlsson // Layout fields. 5019cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner CGRecordLayout *Layout = ComputeRecordLayout(RD, Ty); 502696798febaf1f69020cdf7474b91e71736c5aa69Anders Carlsson CGRecordLayouts[Key] = Layout; 5031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 504f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // If this struct blocked a FunctionType conversion, then recompute whatever 505f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // was derived from that. 506f0a8679b6e6635117533b89894646f1450cea25bChris Lattner // FIXME: This is hugely overconservative. 50757eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner if (SkippedLayout) 50857eb23f34ed2586069273c66f1a9994fe2b42967Chris Lattner TypeCache.clear(); 509f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 5109cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 5119cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // Restore our recursion state. If we're done converting the outer-most 5129cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner // record, then convert any deferred structs as well. 5139cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner RecursionState = SavedRecursionState; 514f0a8679b6e6635117533b89894646f1450cea25bChris Lattner 5159cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner if (RecursionState == RS_Normal) 5169cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner while (!DeferredRecords.empty()) 5179cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ConvertRecordDeclType(DeferredRecords.pop_back_val()); 5189cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner 5199cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return Ty; 5201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 521fc3b8e9c1381d5e6ec361591d649c56a870ff971Chris Lattner 5222d987772c2ba3bff93b9fbe7b73bf06eed2b1607Anders Carlsson/// getCGRecordLayout - Return record layout info for the given record decl. 523ad3e7118c40711faf5f51f08d599dbd525d3408aAnders Carlssonconst CGRecordLayout & 5242d987772c2ba3bff93b9fbe7b73bf06eed2b1607Anders CarlssonCodeGenTypes::getCGRecordLayout(const RecordDecl *RD) { 5252d987772c2ba3bff93b9fbe7b73bf06eed2b1607Anders Carlsson const Type *Key = Context.getTagDeclType(RD).getTypePtr(); 52682926963cccbc54bc707d5dcf79389166046ef08Anders Carlsson 527270e203b50ed8791e61afd357596bcf050cf2bfdDaniel Dunbar const CGRecordLayout *Layout = CGRecordLayouts.lookup(Key); 528c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson if (!Layout) { 5292d987772c2ba3bff93b9fbe7b73bf06eed2b1607Anders Carlsson // Compute the type information. 5309cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ConvertRecordDeclType(RD); 531c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson 532c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson // Now try again. 533c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson Layout = CGRecordLayouts.lookup(Key); 534c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson } 535c8f01ebbce3c874b43ee78535f7d179517f5f436Anders Carlsson 536270e203b50ed8791e61afd357596bcf050cf2bfdDaniel Dunbar assert(Layout && "Unable to find record layout information for type"); 537270e203b50ed8791e61afd357596bcf050cf2bfdDaniel Dunbar return *Layout; 538b84a06e68ffd71da22e3c75b6e4bbdba37816413Devang Patel} 5393e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson 540f16aa103d3afd42fbca2ab346f191bf745cec092John McCallbool CodeGenTypes::isZeroInitializable(QualType T) { 5413e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson // No need to check for member pointers when not compiling C++. 5423e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson if (!Context.getLangOptions().CPlusPlus) 543f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return true; 5443e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson 5453e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson T = Context.getBaseElementType(T); 5463e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson 547f16aa103d3afd42fbca2ab346f191bf745cec092John McCall // Records are non-zero-initializable if they contain any 548f16aa103d3afd42fbca2ab346f191bf745cec092John McCall // non-zero-initializable subobjects. 5493e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson if (const RecordType *RT = T->getAs<RecordType>()) { 5503e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson const CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 551f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return isZeroInitializable(RD); 5523e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson } 553f16aa103d3afd42fbca2ab346f191bf745cec092John McCall 554f16aa103d3afd42fbca2ab346f191bf745cec092John McCall // We have to ask the ABI about member pointers. 5553e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson if (const MemberPointerType *MPT = T->getAs<MemberPointerType>()) 556f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return getCXXABI().isZeroInitializable(MPT); 5573e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson 558f16aa103d3afd42fbca2ab346f191bf745cec092John McCall // Everything else is okay. 559f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return true; 5603e5af908ebf4c56b657c488bb2ca22f418e0868bAnders Carlsson} 561c39211d2aef5b8ca2bc69c9fb81ca3dfb3711eb0Anders Carlsson 562f16aa103d3afd42fbca2ab346f191bf745cec092John McCallbool CodeGenTypes::isZeroInitializable(const CXXRecordDecl *RD) { 5633379e9bd71c0e0051bd97e90d4f2ec964078091dAnders Carlsson return getCGRecordLayout(RD).isZeroInitializable(); 564c39211d2aef5b8ca2bc69c9fb81ca3dfb3711eb0Anders Carlsson} 565