Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 1 | //===----- CGCall.h - Encapsulate calling convention details ----*- C++ -*-===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // These classes wrap the information about a call or function |
| 11 | // definition used to handle ABI compliancy. |
| 12 | // |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | |
| 15 | #include "CGCall.h" |
| 16 | #include "CodeGenFunction.h" |
Daniel Dunbar | b768807 | 2008-09-10 00:41:16 +0000 | [diff] [blame] | 17 | #include "CodeGenModule.h" |
Daniel Dunbar | 6b1da0e | 2008-10-13 17:02:26 +0000 | [diff] [blame] | 18 | #include "clang/Basic/TargetInfo.h" |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 19 | #include "clang/AST/Decl.h" |
Anders Carlsson | f6f8ae5 | 2009-04-03 22:48:58 +0000 | [diff] [blame] | 20 | #include "clang/AST/DeclCXX.h" |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 21 | #include "clang/AST/DeclObjC.h" |
Devang Patel | 24095da | 2009-06-04 23:32:02 +0000 | [diff] [blame] | 22 | #include "clang/Frontend/CompileOptions.h" |
Devang Patel | d0646bd | 2008-09-24 01:01:36 +0000 | [diff] [blame] | 23 | #include "llvm/Attributes.h" |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 24 | #include "llvm/Support/CallSite.h" |
Daniel Dunbar | 54d1ccb | 2009-01-27 01:36:03 +0000 | [diff] [blame] | 25 | #include "llvm/Target/TargetData.h" |
Daniel Dunbar | 9eb5c6d | 2009-02-03 01:05:53 +0000 | [diff] [blame] | 26 | |
| 27 | #include "ABIInfo.h" |
| 28 | |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 29 | using namespace clang; |
| 30 | using namespace CodeGen; |
| 31 | |
| 32 | /***/ |
| 33 | |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 34 | // FIXME: Use iterator and sidestep silly type array creation. |
| 35 | |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 36 | const |
Douglas Gregor | 72564e7 | 2009-02-26 23:50:07 +0000 | [diff] [blame] | 37 | CGFunctionInfo &CodeGenTypes::getFunctionInfo(const FunctionNoProtoType *FTNP) { |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 38 | return getFunctionInfo(FTNP->getResultType(), |
| 39 | llvm::SmallVector<QualType, 16>()); |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 40 | } |
| 41 | |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 42 | const |
Douglas Gregor | 72564e7 | 2009-02-26 23:50:07 +0000 | [diff] [blame] | 43 | CGFunctionInfo &CodeGenTypes::getFunctionInfo(const FunctionProtoType *FTP) { |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 44 | llvm::SmallVector<QualType, 16> ArgTys; |
| 45 | // FIXME: Kill copy. |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 46 | for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i) |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 47 | ArgTys.push_back(FTP->getArgType(i)); |
| 48 | return getFunctionInfo(FTP->getResultType(), ArgTys); |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 49 | } |
| 50 | |
Anders Carlsson | f6f8ae5 | 2009-04-03 22:48:58 +0000 | [diff] [blame] | 51 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const CXXMethodDecl *MD) { |
| 52 | llvm::SmallVector<QualType, 16> ArgTys; |
Chris Lattner | 3eb67ca | 2009-05-12 20:27:19 +0000 | [diff] [blame] | 53 | // Add the 'this' pointer unless this is a static method. |
| 54 | if (MD->isInstance()) |
| 55 | ArgTys.push_back(MD->getThisType(Context)); |
Anders Carlsson | f6f8ae5 | 2009-04-03 22:48:58 +0000 | [diff] [blame] | 56 | |
| 57 | const FunctionProtoType *FTP = MD->getType()->getAsFunctionProtoType(); |
| 58 | for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i) |
| 59 | ArgTys.push_back(FTP->getArgType(i)); |
| 60 | return getFunctionInfo(FTP->getResultType(), ArgTys); |
| 61 | } |
| 62 | |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 63 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const FunctionDecl *FD) { |
Chris Lattner | 3eb67ca | 2009-05-12 20:27:19 +0000 | [diff] [blame] | 64 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) |
Anders Carlsson | f6f8ae5 | 2009-04-03 22:48:58 +0000 | [diff] [blame] | 65 | if (MD->isInstance()) |
| 66 | return getFunctionInfo(MD); |
Anders Carlsson | f6f8ae5 | 2009-04-03 22:48:58 +0000 | [diff] [blame] | 67 | |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 68 | const FunctionType *FTy = FD->getType()->getAsFunctionType(); |
Douglas Gregor | 72564e7 | 2009-02-26 23:50:07 +0000 | [diff] [blame] | 69 | if (const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FTy)) |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 70 | return getFunctionInfo(FTP); |
Douglas Gregor | 72564e7 | 2009-02-26 23:50:07 +0000 | [diff] [blame] | 71 | return getFunctionInfo(cast<FunctionNoProtoType>(FTy)); |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 72 | } |
| 73 | |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 74 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const ObjCMethodDecl *MD) { |
| 75 | llvm::SmallVector<QualType, 16> ArgTys; |
| 76 | ArgTys.push_back(MD->getSelfDecl()->getType()); |
| 77 | ArgTys.push_back(Context.getObjCSelType()); |
| 78 | // FIXME: Kill copy? |
Chris Lattner | 2073216 | 2009-02-20 06:23:21 +0000 | [diff] [blame] | 79 | for (ObjCMethodDecl::param_iterator i = MD->param_begin(), |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 80 | e = MD->param_end(); i != e; ++i) |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 81 | ArgTys.push_back((*i)->getType()); |
| 82 | return getFunctionInfo(MD->getResultType(), ArgTys); |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 83 | } |
| 84 | |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 85 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(QualType ResTy, |
| 86 | const CallArgList &Args) { |
| 87 | // FIXME: Kill copy. |
| 88 | llvm::SmallVector<QualType, 16> ArgTys; |
Daniel Dunbar | 725ad31 | 2009-01-31 02:19:00 +0000 | [diff] [blame] | 89 | for (CallArgList::const_iterator i = Args.begin(), e = Args.end(); |
| 90 | i != e; ++i) |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 91 | ArgTys.push_back(i->second); |
| 92 | return getFunctionInfo(ResTy, ArgTys); |
Daniel Dunbar | 725ad31 | 2009-01-31 02:19:00 +0000 | [diff] [blame] | 93 | } |
| 94 | |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 95 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(QualType ResTy, |
| 96 | const FunctionArgList &Args) { |
| 97 | // FIXME: Kill copy. |
| 98 | llvm::SmallVector<QualType, 16> ArgTys; |
Daniel Dunbar | bb36d33 | 2009-02-02 21:43:58 +0000 | [diff] [blame] | 99 | for (FunctionArgList::const_iterator i = Args.begin(), e = Args.end(); |
| 100 | i != e; ++i) |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 101 | ArgTys.push_back(i->second); |
| 102 | return getFunctionInfo(ResTy, ArgTys); |
| 103 | } |
| 104 | |
| 105 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(QualType ResTy, |
| 106 | const llvm::SmallVector<QualType, 16> &ArgTys) { |
Daniel Dunbar | 40a6be6 | 2009-02-03 00:07:12 +0000 | [diff] [blame] | 107 | // Lookup or create unique function info. |
| 108 | llvm::FoldingSetNodeID ID; |
| 109 | CGFunctionInfo::Profile(ID, ResTy, ArgTys.begin(), ArgTys.end()); |
| 110 | |
| 111 | void *InsertPos = 0; |
| 112 | CGFunctionInfo *FI = FunctionInfos.FindNodeOrInsertPos(ID, InsertPos); |
| 113 | if (FI) |
| 114 | return *FI; |
| 115 | |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 116 | // Construct the function info. |
Daniel Dunbar | 40a6be6 | 2009-02-03 00:07:12 +0000 | [diff] [blame] | 117 | FI = new CGFunctionInfo(ResTy, ArgTys); |
Daniel Dunbar | 35e67d4 | 2009-02-05 00:00:23 +0000 | [diff] [blame] | 118 | FunctionInfos.InsertNode(FI, InsertPos); |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 119 | |
| 120 | // Compute ABI information. |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 121 | getABIInfo().computeInfo(*FI, getContext(), TheModule.getContext()); |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 122 | |
Daniel Dunbar | 40a6be6 | 2009-02-03 00:07:12 +0000 | [diff] [blame] | 123 | return *FI; |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 124 | } |
| 125 | |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 126 | CGFunctionInfo::CGFunctionInfo(QualType ResTy, |
| 127 | const llvm::SmallVector<QualType, 16> &ArgTys) { |
| 128 | NumArgs = ArgTys.size(); |
| 129 | Args = new ArgInfo[1 + NumArgs]; |
| 130 | Args[0].type = ResTy; |
| 131 | for (unsigned i = 0; i < NumArgs; ++i) |
| 132 | Args[1 + i].type = ArgTys[i]; |
| 133 | } |
| 134 | |
| 135 | /***/ |
| 136 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 137 | void CodeGenTypes::GetExpandedTypes(QualType Ty, |
| 138 | std::vector<const llvm::Type*> &ArgTys) { |
| 139 | const RecordType *RT = Ty->getAsStructureType(); |
| 140 | assert(RT && "Can only expand structure types."); |
| 141 | const RecordDecl *RD = RT->getDecl(); |
| 142 | assert(!RD->hasFlexibleArrayMember() && |
| 143 | "Cannot expand structure with flexible array."); |
| 144 | |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 145 | for (RecordDecl::field_iterator i = RD->field_begin(), e = RD->field_end(); |
| 146 | i != e; ++i) { |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 147 | const FieldDecl *FD = *i; |
| 148 | assert(!FD->isBitField() && |
| 149 | "Cannot expand structure with bit-field members."); |
| 150 | |
| 151 | QualType FT = FD->getType(); |
| 152 | if (CodeGenFunction::hasAggregateLLVMType(FT)) { |
| 153 | GetExpandedTypes(FT, ArgTys); |
| 154 | } else { |
| 155 | ArgTys.push_back(ConvertType(FT)); |
| 156 | } |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | llvm::Function::arg_iterator |
| 161 | CodeGenFunction::ExpandTypeFromArgs(QualType Ty, LValue LV, |
| 162 | llvm::Function::arg_iterator AI) { |
| 163 | const RecordType *RT = Ty->getAsStructureType(); |
| 164 | assert(RT && "Can only expand structure types."); |
| 165 | |
| 166 | RecordDecl *RD = RT->getDecl(); |
| 167 | assert(LV.isSimple() && |
| 168 | "Unexpected non-simple lvalue during struct expansion."); |
| 169 | llvm::Value *Addr = LV.getAddress(); |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 170 | for (RecordDecl::field_iterator i = RD->field_begin(), e = RD->field_end(); |
| 171 | i != e; ++i) { |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 172 | FieldDecl *FD = *i; |
| 173 | QualType FT = FD->getType(); |
| 174 | |
| 175 | // FIXME: What are the right qualifiers here? |
| 176 | LValue LV = EmitLValueForField(Addr, FD, false, 0); |
| 177 | if (CodeGenFunction::hasAggregateLLVMType(FT)) { |
| 178 | AI = ExpandTypeFromArgs(FT, LV, AI); |
| 179 | } else { |
| 180 | EmitStoreThroughLValue(RValue::get(AI), LV, FT); |
| 181 | ++AI; |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | return AI; |
| 186 | } |
| 187 | |
| 188 | void |
| 189 | CodeGenFunction::ExpandTypeToArgs(QualType Ty, RValue RV, |
| 190 | llvm::SmallVector<llvm::Value*, 16> &Args) { |
| 191 | const RecordType *RT = Ty->getAsStructureType(); |
| 192 | assert(RT && "Can only expand structure types."); |
| 193 | |
| 194 | RecordDecl *RD = RT->getDecl(); |
| 195 | assert(RV.isAggregate() && "Unexpected rvalue during struct expansion"); |
| 196 | llvm::Value *Addr = RV.getAggregateAddr(); |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 197 | for (RecordDecl::field_iterator i = RD->field_begin(), e = RD->field_end(); |
| 198 | i != e; ++i) { |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 199 | FieldDecl *FD = *i; |
| 200 | QualType FT = FD->getType(); |
| 201 | |
| 202 | // FIXME: What are the right qualifiers here? |
| 203 | LValue LV = EmitLValueForField(Addr, FD, false, 0); |
| 204 | if (CodeGenFunction::hasAggregateLLVMType(FT)) { |
| 205 | ExpandTypeToArgs(FT, RValue::getAggregate(LV.getAddress()), Args); |
| 206 | } else { |
| 207 | RValue RV = EmitLoadOfLValue(LV, FT); |
| 208 | assert(RV.isScalar() && |
| 209 | "Unexpected non-scalar rvalue during struct expansion."); |
| 210 | Args.push_back(RV.getScalarVal()); |
| 211 | } |
| 212 | } |
| 213 | } |
| 214 | |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 215 | /// CreateCoercedLoad - Create a load from \arg SrcPtr interpreted as |
| 216 | /// a pointer to an object of type \arg Ty. |
| 217 | /// |
| 218 | /// This safely handles the case when the src type is smaller than the |
| 219 | /// destination type; in this situation the values of bits which not |
| 220 | /// present in the src are undefined. |
| 221 | static llvm::Value *CreateCoercedLoad(llvm::Value *SrcPtr, |
| 222 | const llvm::Type *Ty, |
| 223 | CodeGenFunction &CGF) { |
| 224 | const llvm::Type *SrcTy = |
| 225 | cast<llvm::PointerType>(SrcPtr->getType())->getElementType(); |
Duncan Sands | 9408c45 | 2009-05-09 07:08:47 +0000 | [diff] [blame] | 226 | uint64_t SrcSize = CGF.CGM.getTargetData().getTypeAllocSize(SrcTy); |
| 227 | uint64_t DstSize = CGF.CGM.getTargetData().getTypeAllocSize(Ty); |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 228 | |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 229 | // If load is legal, just bitcast the src pointer. |
Daniel Dunbar | 7ef455b | 2009-05-13 18:54:26 +0000 | [diff] [blame] | 230 | if (SrcSize >= DstSize) { |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 231 | // Generally SrcSize is never greater than DstSize, since this means we are |
| 232 | // losing bits. However, this can happen in cases where the structure has |
| 233 | // additional padding, for example due to a user specified alignment. |
Daniel Dunbar | 7ef455b | 2009-05-13 18:54:26 +0000 | [diff] [blame] | 234 | // |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 235 | // FIXME: Assert that we aren't truncating non-padding bits when have access |
| 236 | // to that information. |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 237 | llvm::Value *Casted = |
| 238 | CGF.Builder.CreateBitCast(SrcPtr, llvm::PointerType::getUnqual(Ty)); |
Daniel Dunbar | 386621f | 2009-02-07 02:46:03 +0000 | [diff] [blame] | 239 | llvm::LoadInst *Load = CGF.Builder.CreateLoad(Casted); |
| 240 | // FIXME: Use better alignment / avoid requiring aligned load. |
| 241 | Load->setAlignment(1); |
| 242 | return Load; |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 243 | } else { |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 244 | // Otherwise do coercion through memory. This is stupid, but |
| 245 | // simple. |
| 246 | llvm::Value *Tmp = CGF.CreateTempAlloca(Ty); |
| 247 | llvm::Value *Casted = |
| 248 | CGF.Builder.CreateBitCast(Tmp, llvm::PointerType::getUnqual(SrcTy)); |
Daniel Dunbar | 386621f | 2009-02-07 02:46:03 +0000 | [diff] [blame] | 249 | llvm::StoreInst *Store = |
| 250 | CGF.Builder.CreateStore(CGF.Builder.CreateLoad(SrcPtr), Casted); |
| 251 | // FIXME: Use better alignment / avoid requiring aligned store. |
| 252 | Store->setAlignment(1); |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 253 | return CGF.Builder.CreateLoad(Tmp); |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | /// CreateCoercedStore - Create a store to \arg DstPtr from \arg Src, |
| 258 | /// where the source and destination may have different types. |
| 259 | /// |
| 260 | /// This safely handles the case when the src type is larger than the |
| 261 | /// destination type; the upper bits of the src will be lost. |
| 262 | static void CreateCoercedStore(llvm::Value *Src, |
| 263 | llvm::Value *DstPtr, |
| 264 | CodeGenFunction &CGF) { |
| 265 | const llvm::Type *SrcTy = Src->getType(); |
| 266 | const llvm::Type *DstTy = |
| 267 | cast<llvm::PointerType>(DstPtr->getType())->getElementType(); |
| 268 | |
Duncan Sands | 9408c45 | 2009-05-09 07:08:47 +0000 | [diff] [blame] | 269 | uint64_t SrcSize = CGF.CGM.getTargetData().getTypeAllocSize(SrcTy); |
| 270 | uint64_t DstSize = CGF.CGM.getTargetData().getTypeAllocSize(DstTy); |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 271 | |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 272 | // If store is legal, just bitcast the src pointer. |
Daniel Dunbar | fdf4986 | 2009-06-05 07:58:54 +0000 | [diff] [blame] | 273 | if (SrcSize <= DstSize) { |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 274 | llvm::Value *Casted = |
| 275 | CGF.Builder.CreateBitCast(DstPtr, llvm::PointerType::getUnqual(SrcTy)); |
Daniel Dunbar | 386621f | 2009-02-07 02:46:03 +0000 | [diff] [blame] | 276 | // FIXME: Use better alignment / avoid requiring aligned store. |
| 277 | CGF.Builder.CreateStore(Src, Casted)->setAlignment(1); |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 278 | } else { |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 279 | // Otherwise do coercion through memory. This is stupid, but |
| 280 | // simple. |
Daniel Dunbar | fdf4986 | 2009-06-05 07:58:54 +0000 | [diff] [blame] | 281 | |
| 282 | // Generally SrcSize is never greater than DstSize, since this means we are |
| 283 | // losing bits. However, this can happen in cases where the structure has |
| 284 | // additional padding, for example due to a user specified alignment. |
| 285 | // |
| 286 | // FIXME: Assert that we aren't truncating non-padding bits when have access |
| 287 | // to that information. |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 288 | llvm::Value *Tmp = CGF.CreateTempAlloca(SrcTy); |
| 289 | CGF.Builder.CreateStore(Src, Tmp); |
| 290 | llvm::Value *Casted = |
| 291 | CGF.Builder.CreateBitCast(Tmp, llvm::PointerType::getUnqual(DstTy)); |
Daniel Dunbar | 386621f | 2009-02-07 02:46:03 +0000 | [diff] [blame] | 292 | llvm::LoadInst *Load = CGF.Builder.CreateLoad(Casted); |
| 293 | // FIXME: Use better alignment / avoid requiring aligned load. |
| 294 | Load->setAlignment(1); |
| 295 | CGF.Builder.CreateStore(Load, DstPtr); |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 296 | } |
| 297 | } |
| 298 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 299 | /***/ |
| 300 | |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 301 | bool CodeGenModule::ReturnTypeUsesSret(const CGFunctionInfo &FI) { |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 302 | return FI.getReturnInfo().isIndirect(); |
Daniel Dunbar | bb36d33 | 2009-02-02 21:43:58 +0000 | [diff] [blame] | 303 | } |
| 304 | |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 305 | const llvm::FunctionType * |
Daniel Dunbar | bb36d33 | 2009-02-02 21:43:58 +0000 | [diff] [blame] | 306 | CodeGenTypes::GetFunctionType(const CGFunctionInfo &FI, bool IsVariadic) { |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 307 | std::vector<const llvm::Type*> ArgTys; |
| 308 | |
| 309 | const llvm::Type *ResultType = 0; |
| 310 | |
Daniel Dunbar | a0a99e0 | 2009-02-02 23:43:58 +0000 | [diff] [blame] | 311 | QualType RetTy = FI.getReturnType(); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 312 | const ABIArgInfo &RetAI = FI.getReturnInfo(); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 313 | switch (RetAI.getKind()) { |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 314 | case ABIArgInfo::Expand: |
| 315 | assert(0 && "Invalid ABI kind for return argument"); |
| 316 | |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 317 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 318 | case ABIArgInfo::Direct: |
| 319 | ResultType = ConvertType(RetTy); |
| 320 | break; |
| 321 | |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 322 | case ABIArgInfo::Indirect: { |
| 323 | assert(!RetAI.getIndirectAlign() && "Align unused on indirect return."); |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 324 | ResultType = llvm::Type::VoidTy; |
Daniel Dunbar | 62d5c1b | 2008-09-10 07:00:50 +0000 | [diff] [blame] | 325 | const llvm::Type *STy = ConvertType(RetTy); |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 326 | ArgTys.push_back(llvm::PointerType::get(STy, RetTy.getAddressSpace())); |
| 327 | break; |
| 328 | } |
| 329 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 330 | case ABIArgInfo::Ignore: |
| 331 | ResultType = llvm::Type::VoidTy; |
| 332 | break; |
| 333 | |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 334 | case ABIArgInfo::Coerce: |
Daniel Dunbar | 639ffe4 | 2008-09-10 07:04:09 +0000 | [diff] [blame] | 335 | ResultType = RetAI.getCoerceToType(); |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 336 | break; |
| 337 | } |
| 338 | |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 339 | for (CGFunctionInfo::const_arg_iterator it = FI.arg_begin(), |
| 340 | ie = FI.arg_end(); it != ie; ++it) { |
| 341 | const ABIArgInfo &AI = it->info; |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 342 | |
| 343 | switch (AI.getKind()) { |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 344 | case ABIArgInfo::Ignore: |
| 345 | break; |
| 346 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 347 | case ABIArgInfo::Coerce: |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 348 | ArgTys.push_back(AI.getCoerceToType()); |
| 349 | break; |
| 350 | |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 351 | case ABIArgInfo::Indirect: { |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 352 | // indirect arguments are always on the stack, which is addr space #0. |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 353 | const llvm::Type *LTy = ConvertTypeForMem(it->type); |
| 354 | ArgTys.push_back(llvm::PointerType::getUnqual(LTy)); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 355 | break; |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 356 | } |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 357 | |
| 358 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 359 | case ABIArgInfo::Direct: |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 360 | ArgTys.push_back(ConvertType(it->type)); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 361 | break; |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 362 | |
| 363 | case ABIArgInfo::Expand: |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 364 | GetExpandedTypes(it->type, ArgTys); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 365 | break; |
| 366 | } |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 367 | } |
| 368 | |
Daniel Dunbar | bb36d33 | 2009-02-02 21:43:58 +0000 | [diff] [blame] | 369 | return llvm::FunctionType::get(ResultType, ArgTys, IsVariadic); |
Daniel Dunbar | 3913f18 | 2008-09-09 23:48:28 +0000 | [diff] [blame] | 370 | } |
| 371 | |
Daniel Dunbar | a0a99e0 | 2009-02-02 23:43:58 +0000 | [diff] [blame] | 372 | void CodeGenModule::ConstructAttributeList(const CGFunctionInfo &FI, |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 373 | const Decl *TargetDecl, |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 374 | AttributeListType &PAL) { |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 375 | unsigned FuncAttrs = 0; |
Devang Patel | a2c6912 | 2008-09-26 22:53:57 +0000 | [diff] [blame] | 376 | unsigned RetAttrs = 0; |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 377 | |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 378 | // FIXME: handle sseregparm someday... |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 379 | if (TargetDecl) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 380 | if (TargetDecl->hasAttr<NoThrowAttr>()) |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 381 | FuncAttrs |= llvm::Attribute::NoUnwind; |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 382 | if (TargetDecl->hasAttr<NoReturnAttr>()) |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 383 | FuncAttrs |= llvm::Attribute::NoReturn; |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 384 | if (TargetDecl->hasAttr<ConstAttr>()) |
Anders Carlsson | 232eb7d | 2008-10-05 23:32:53 +0000 | [diff] [blame] | 385 | FuncAttrs |= llvm::Attribute::ReadNone; |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 386 | else if (TargetDecl->hasAttr<PureAttr>()) |
Daniel Dunbar | 64c2e07 | 2009-04-10 22:14:52 +0000 | [diff] [blame] | 387 | FuncAttrs |= llvm::Attribute::ReadOnly; |
Ryan Flynn | 76168e2 | 2009-08-09 20:07:29 +0000 | [diff] [blame] | 388 | if (TargetDecl->hasAttr<MallocAttr>()) |
| 389 | RetAttrs |= llvm::Attribute::NoAlias; |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 390 | } |
| 391 | |
Devang Patel | 24095da | 2009-06-04 23:32:02 +0000 | [diff] [blame] | 392 | if (CompileOpts.DisableRedZone) |
| 393 | FuncAttrs |= llvm::Attribute::NoRedZone; |
Devang Patel | acebb39 | 2009-06-05 22:05:48 +0000 | [diff] [blame] | 394 | if (CompileOpts.NoImplicitFloat) |
| 395 | FuncAttrs |= llvm::Attribute::NoImplicitFloat; |
Devang Patel | 24095da | 2009-06-04 23:32:02 +0000 | [diff] [blame] | 396 | |
Bill Wendling | 4ebe3e4 | 2009-06-28 23:01:01 +0000 | [diff] [blame] | 397 | if (Features.getStackProtectorMode() == LangOptions::SSPOn) |
Bill Wendling | 45483f7 | 2009-06-28 07:36:13 +0000 | [diff] [blame] | 398 | FuncAttrs |= llvm::Attribute::StackProtect; |
Bill Wendling | 4ebe3e4 | 2009-06-28 23:01:01 +0000 | [diff] [blame] | 399 | else if (Features.getStackProtectorMode() == LangOptions::SSPReq) |
Bill Wendling | 45483f7 | 2009-06-28 07:36:13 +0000 | [diff] [blame] | 400 | FuncAttrs |= llvm::Attribute::StackProtectReq; |
| 401 | |
Daniel Dunbar | a0a99e0 | 2009-02-02 23:43:58 +0000 | [diff] [blame] | 402 | QualType RetTy = FI.getReturnType(); |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 403 | unsigned Index = 1; |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 404 | const ABIArgInfo &RetAI = FI.getReturnInfo(); |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 405 | switch (RetAI.getKind()) { |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 406 | case ABIArgInfo::Extend: |
| 407 | if (RetTy->isSignedIntegerType()) { |
| 408 | RetAttrs |= llvm::Attribute::SExt; |
| 409 | } else if (RetTy->isUnsignedIntegerType()) { |
| 410 | RetAttrs |= llvm::Attribute::ZExt; |
| 411 | } |
| 412 | // FALLTHROUGH |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 413 | case ABIArgInfo::Direct: |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 414 | break; |
| 415 | |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 416 | case ABIArgInfo::Indirect: |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 417 | PAL.push_back(llvm::AttributeWithIndex::get(Index, |
Daniel Dunbar | 725ad31 | 2009-01-31 02:19:00 +0000 | [diff] [blame] | 418 | llvm::Attribute::StructRet | |
| 419 | llvm::Attribute::NoAlias)); |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 420 | ++Index; |
Daniel Dunbar | 0ac86f0 | 2009-03-18 19:51:01 +0000 | [diff] [blame] | 421 | // sret disables readnone and readonly |
| 422 | FuncAttrs &= ~(llvm::Attribute::ReadOnly | |
| 423 | llvm::Attribute::ReadNone); |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 424 | break; |
| 425 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 426 | case ABIArgInfo::Ignore: |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 427 | case ABIArgInfo::Coerce: |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 428 | break; |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 429 | |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 430 | case ABIArgInfo::Expand: |
| 431 | assert(0 && "Invalid ABI kind for return argument"); |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 432 | } |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 433 | |
Devang Patel | a2c6912 | 2008-09-26 22:53:57 +0000 | [diff] [blame] | 434 | if (RetAttrs) |
| 435 | PAL.push_back(llvm::AttributeWithIndex::get(0, RetAttrs)); |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 436 | |
| 437 | // FIXME: we need to honour command line settings also... |
| 438 | // FIXME: RegParm should be reduced in case of nested functions and/or global |
| 439 | // register variable. |
| 440 | signed RegParm = 0; |
| 441 | if (TargetDecl) |
Douglas Gregor | 68584ed | 2009-06-18 16:11:24 +0000 | [diff] [blame] | 442 | if (const RegparmAttr *RegParmAttr |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 443 | = TargetDecl->getAttr<RegparmAttr>()) |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 444 | RegParm = RegParmAttr->getNumParams(); |
| 445 | |
| 446 | unsigned PointerWidth = getContext().Target.getPointerWidth(0); |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 447 | for (CGFunctionInfo::const_arg_iterator it = FI.arg_begin(), |
| 448 | ie = FI.arg_end(); it != ie; ++it) { |
| 449 | QualType ParamType = it->type; |
| 450 | const ABIArgInfo &AI = it->info; |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 451 | unsigned Attributes = 0; |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 452 | |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 453 | switch (AI.getKind()) { |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 454 | case ABIArgInfo::Coerce: |
| 455 | break; |
| 456 | |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 457 | case ABIArgInfo::Indirect: |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 458 | Attributes |= llvm::Attribute::ByVal; |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 459 | Attributes |= |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 460 | llvm::Attribute::constructAlignmentFromInt(AI.getIndirectAlign()); |
Daniel Dunbar | 0ac86f0 | 2009-03-18 19:51:01 +0000 | [diff] [blame] | 461 | // byval disables readnone and readonly. |
| 462 | FuncAttrs &= ~(llvm::Attribute::ReadOnly | |
| 463 | llvm::Attribute::ReadNone); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 464 | break; |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 465 | |
| 466 | case ABIArgInfo::Extend: |
| 467 | if (ParamType->isSignedIntegerType()) { |
| 468 | Attributes |= llvm::Attribute::SExt; |
| 469 | } else if (ParamType->isUnsignedIntegerType()) { |
| 470 | Attributes |= llvm::Attribute::ZExt; |
| 471 | } |
| 472 | // FALLS THROUGH |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 473 | case ABIArgInfo::Direct: |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 474 | if (RegParm > 0 && |
| 475 | (ParamType->isIntegerType() || ParamType->isPointerType())) { |
| 476 | RegParm -= |
| 477 | (Context.getTypeSize(ParamType) + PointerWidth - 1) / PointerWidth; |
| 478 | if (RegParm >= 0) |
| 479 | Attributes |= llvm::Attribute::InReg; |
| 480 | } |
| 481 | // FIXME: handle sseregparm someday... |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 482 | break; |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 483 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 484 | case ABIArgInfo::Ignore: |
| 485 | // Skip increment, no matching LLVM parameter. |
| 486 | continue; |
| 487 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 488 | case ABIArgInfo::Expand: { |
| 489 | std::vector<const llvm::Type*> Tys; |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 490 | // FIXME: This is rather inefficient. Do we ever actually need to do |
| 491 | // anything here? The result should be just reconstructed on the other |
| 492 | // side, so extension should be a non-issue. |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 493 | getTypes().GetExpandedTypes(ParamType, Tys); |
| 494 | Index += Tys.size(); |
| 495 | continue; |
| 496 | } |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 497 | } |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 498 | |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 499 | if (Attributes) |
| 500 | PAL.push_back(llvm::AttributeWithIndex::get(Index, Attributes)); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 501 | ++Index; |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 502 | } |
Devang Patel | a2c6912 | 2008-09-26 22:53:57 +0000 | [diff] [blame] | 503 | if (FuncAttrs) |
| 504 | PAL.push_back(llvm::AttributeWithIndex::get(~0, FuncAttrs)); |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 505 | } |
| 506 | |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 507 | void CodeGenFunction::EmitFunctionProlog(const CGFunctionInfo &FI, |
| 508 | llvm::Function *Fn, |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 509 | const FunctionArgList &Args) { |
John McCall | 0cfeb63 | 2009-07-28 01:00:58 +0000 | [diff] [blame] | 510 | // If this is an implicit-return-zero function, go ahead and |
| 511 | // initialize the return value. TODO: it might be nice to have |
| 512 | // a more general mechanism for this that didn't require synthesized |
| 513 | // return statements. |
Anders Carlsson | 89ed31d | 2009-08-08 23:24:23 +0000 | [diff] [blame] | 514 | if (const FunctionDecl* FD = dyn_cast_or_null<FunctionDecl>(CurFuncDecl)) { |
John McCall | 0cfeb63 | 2009-07-28 01:00:58 +0000 | [diff] [blame] | 515 | if (FD->hasImplicitReturnZero()) { |
| 516 | QualType RetTy = FD->getResultType().getUnqualifiedType(); |
| 517 | const llvm::Type* LLVMTy = CGM.getTypes().ConvertType(RetTy); |
Owen Anderson | c9c88b4 | 2009-07-31 20:28:54 +0000 | [diff] [blame] | 518 | llvm::Constant* Zero = llvm::Constant::getNullValue(LLVMTy); |
John McCall | 0cfeb63 | 2009-07-28 01:00:58 +0000 | [diff] [blame] | 519 | Builder.CreateStore(Zero, ReturnValue); |
| 520 | } |
| 521 | } |
| 522 | |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 523 | // FIXME: We no longer need the types from FunctionArgList; lift up and |
| 524 | // simplify. |
Daniel Dunbar | 5251afa | 2009-02-03 06:02:10 +0000 | [diff] [blame] | 525 | |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 526 | // Emit allocs for param decls. Give the LLVM Argument nodes names. |
| 527 | llvm::Function::arg_iterator AI = Fn->arg_begin(); |
| 528 | |
| 529 | // Name the struct return argument. |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 530 | if (CGM.ReturnTypeUsesSret(FI)) { |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 531 | AI->setName("agg.result"); |
| 532 | ++AI; |
| 533 | } |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 534 | |
Daniel Dunbar | 4b5f0a4 | 2009-02-04 21:17:21 +0000 | [diff] [blame] | 535 | assert(FI.arg_size() == Args.size() && |
| 536 | "Mismatch between function signature & arguments."); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 537 | CGFunctionInfo::const_arg_iterator info_it = FI.arg_begin(); |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 538 | for (FunctionArgList::const_iterator i = Args.begin(), e = Args.end(); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 539 | i != e; ++i, ++info_it) { |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 540 | const VarDecl *Arg = i->first; |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 541 | QualType Ty = info_it->type; |
| 542 | const ABIArgInfo &ArgI = info_it->info; |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 543 | |
| 544 | switch (ArgI.getKind()) { |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 545 | case ABIArgInfo::Indirect: { |
| 546 | llvm::Value* V = AI; |
| 547 | if (hasAggregateLLVMType(Ty)) { |
| 548 | // Do nothing, aggregates and complex variables are accessed by |
| 549 | // reference. |
| 550 | } else { |
| 551 | // Load scalar value from indirect argument. |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 552 | V = EmitLoadOfScalar(V, false, Ty); |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 553 | if (!getContext().typesAreCompatible(Ty, Arg->getType())) { |
| 554 | // This must be a promotion, for something like |
| 555 | // "void a(x) short x; {..." |
| 556 | V = EmitScalarConversion(V, Ty, Arg->getType()); |
| 557 | } |
| 558 | } |
| 559 | EmitParmDecl(*Arg, V); |
| 560 | break; |
| 561 | } |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 562 | |
| 563 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 564 | case ABIArgInfo::Direct: { |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 565 | assert(AI != Fn->arg_end() && "Argument mismatch!"); |
| 566 | llvm::Value* V = AI; |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 567 | if (hasAggregateLLVMType(Ty)) { |
| 568 | // Create a temporary alloca to hold the argument; the rest of |
| 569 | // codegen expects to access aggregates & complex values by |
| 570 | // reference. |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 571 | V = CreateTempAlloca(ConvertTypeForMem(Ty)); |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 572 | Builder.CreateStore(AI, V); |
| 573 | } else { |
| 574 | if (!getContext().typesAreCompatible(Ty, Arg->getType())) { |
| 575 | // This must be a promotion, for something like |
| 576 | // "void a(x) short x; {..." |
| 577 | V = EmitScalarConversion(V, Ty, Arg->getType()); |
| 578 | } |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 579 | } |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 580 | EmitParmDecl(*Arg, V); |
| 581 | break; |
| 582 | } |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 583 | |
| 584 | case ABIArgInfo::Expand: { |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 585 | // If this structure was expanded into multiple arguments then |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 586 | // we need to create a temporary and reconstruct it from the |
| 587 | // arguments. |
Chris Lattner | 39f34e9 | 2008-11-24 04:00:27 +0000 | [diff] [blame] | 588 | std::string Name = Arg->getNameAsString(); |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 589 | llvm::Value *Temp = CreateTempAlloca(ConvertTypeForMem(Ty), |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 590 | (Name + ".addr").c_str()); |
| 591 | // FIXME: What are the right qualifiers here? |
| 592 | llvm::Function::arg_iterator End = |
| 593 | ExpandTypeFromArgs(Ty, LValue::MakeAddr(Temp,0), AI); |
| 594 | EmitParmDecl(*Arg, Temp); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 595 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 596 | // Name the arguments used in expansion and increment AI. |
| 597 | unsigned Index = 0; |
| 598 | for (; AI != End; ++AI, ++Index) |
Daniel Dunbar | 0ab9a25 | 2009-08-02 01:43:57 +0000 | [diff] [blame] | 599 | AI->setName(Name + "." + llvm::Twine(Index)); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 600 | continue; |
| 601 | } |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 602 | |
| 603 | case ABIArgInfo::Ignore: |
Daniel Dunbar | 8b979d9 | 2009-02-10 00:06:49 +0000 | [diff] [blame] | 604 | // Initialize the local variable appropriately. |
| 605 | if (hasAggregateLLVMType(Ty)) { |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 606 | EmitParmDecl(*Arg, CreateTempAlloca(ConvertTypeForMem(Ty))); |
Daniel Dunbar | 8b979d9 | 2009-02-10 00:06:49 +0000 | [diff] [blame] | 607 | } else { |
| 608 | EmitParmDecl(*Arg, llvm::UndefValue::get(ConvertType(Arg->getType()))); |
| 609 | } |
| 610 | |
Daniel Dunbar | 59e5a0e | 2009-02-03 20:00:13 +0000 | [diff] [blame] | 611 | // Skip increment, no matching LLVM parameter. |
| 612 | continue; |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 613 | |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 614 | case ABIArgInfo::Coerce: { |
| 615 | assert(AI != Fn->arg_end() && "Argument mismatch!"); |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 616 | // FIXME: This is very wasteful; EmitParmDecl is just going to drop the |
| 617 | // result in a new alloca anyway, so we could just store into that |
| 618 | // directly if we broke the abstraction down more. |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 619 | llvm::Value *V = CreateTempAlloca(ConvertTypeForMem(Ty), "coerce"); |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 620 | CreateCoercedStore(AI, V, *this); |
| 621 | // Match to what EmitParmDecl is expecting for this type. |
Daniel Dunbar | 8b29a38 | 2009-02-04 07:22:24 +0000 | [diff] [blame] | 622 | if (!CodeGenFunction::hasAggregateLLVMType(Ty)) { |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 623 | V = EmitLoadOfScalar(V, false, Ty); |
Daniel Dunbar | 8b29a38 | 2009-02-04 07:22:24 +0000 | [diff] [blame] | 624 | if (!getContext().typesAreCompatible(Ty, Arg->getType())) { |
| 625 | // This must be a promotion, for something like |
| 626 | // "void a(x) short x; {..." |
| 627 | V = EmitScalarConversion(V, Ty, Arg->getType()); |
| 628 | } |
| 629 | } |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 630 | EmitParmDecl(*Arg, V); |
| 631 | break; |
| 632 | } |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 633 | } |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 634 | |
| 635 | ++AI; |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 636 | } |
| 637 | assert(AI == Fn->arg_end() && "Argument mismatch!"); |
| 638 | } |
| 639 | |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 640 | void CodeGenFunction::EmitFunctionEpilog(const CGFunctionInfo &FI, |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 641 | llvm::Value *ReturnValue) { |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 642 | llvm::Value *RV = 0; |
| 643 | |
| 644 | // Functions with no result always return void. |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 645 | if (ReturnValue) { |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 646 | QualType RetTy = FI.getReturnType(); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 647 | const ABIArgInfo &RetAI = FI.getReturnInfo(); |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 648 | |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 649 | switch (RetAI.getKind()) { |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 650 | case ABIArgInfo::Indirect: |
Daniel Dunbar | 3aea8ca | 2008-12-18 04:52:14 +0000 | [diff] [blame] | 651 | if (RetTy->isAnyComplexType()) { |
Daniel Dunbar | 3aea8ca | 2008-12-18 04:52:14 +0000 | [diff] [blame] | 652 | ComplexPairTy RT = LoadComplexFromAddr(ReturnValue, false); |
| 653 | StoreComplexToAddr(RT, CurFn->arg_begin(), false); |
| 654 | } else if (CodeGenFunction::hasAggregateLLVMType(RetTy)) { |
| 655 | EmitAggregateCopy(CurFn->arg_begin(), ReturnValue, RetTy); |
| 656 | } else { |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 657 | EmitStoreOfScalar(Builder.CreateLoad(ReturnValue), CurFn->arg_begin(), |
Anders Carlsson | b4aa466 | 2009-05-19 18:50:41 +0000 | [diff] [blame] | 658 | false, RetTy); |
Daniel Dunbar | 3aea8ca | 2008-12-18 04:52:14 +0000 | [diff] [blame] | 659 | } |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 660 | break; |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 661 | |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 662 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 663 | case ABIArgInfo::Direct: |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 664 | // The internal return value temp always will have |
| 665 | // pointer-to-return-type type. |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 666 | RV = Builder.CreateLoad(ReturnValue); |
| 667 | break; |
| 668 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 669 | case ABIArgInfo::Ignore: |
| 670 | break; |
| 671 | |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 672 | case ABIArgInfo::Coerce: |
Daniel Dunbar | 54d1ccb | 2009-01-27 01:36:03 +0000 | [diff] [blame] | 673 | RV = CreateCoercedLoad(ReturnValue, RetAI.getCoerceToType(), *this); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 674 | break; |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 675 | |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 676 | case ABIArgInfo::Expand: |
| 677 | assert(0 && "Invalid ABI kind for return argument"); |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 678 | } |
| 679 | } |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 680 | |
| 681 | if (RV) { |
| 682 | Builder.CreateRet(RV); |
| 683 | } else { |
| 684 | Builder.CreateRetVoid(); |
| 685 | } |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 686 | } |
| 687 | |
Anders Carlsson | 0139bb9 | 2009-04-08 20:47:54 +0000 | [diff] [blame] | 688 | RValue CodeGenFunction::EmitCallArg(const Expr *E, QualType ArgType) { |
Anders Carlsson | 4029ca7 | 2009-05-20 00:24:07 +0000 | [diff] [blame] | 689 | if (ArgType->isReferenceType()) |
| 690 | return EmitReferenceBindingToExpr(E, ArgType); |
| 691 | |
Anders Carlsson | 0139bb9 | 2009-04-08 20:47:54 +0000 | [diff] [blame] | 692 | return EmitAnyExprToTemp(E); |
| 693 | } |
| 694 | |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 695 | RValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo, |
| 696 | llvm::Value *Callee, |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 697 | const CallArgList &CallArgs, |
| 698 | const Decl *TargetDecl) { |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 699 | // FIXME: We no longer need the types from CallArgs; lift up and simplify. |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 700 | llvm::SmallVector<llvm::Value*, 16> Args; |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 701 | |
| 702 | // Handle struct-return functions by passing a pointer to the |
| 703 | // location that we would like to return into. |
Daniel Dunbar | bb36d33 | 2009-02-02 21:43:58 +0000 | [diff] [blame] | 704 | QualType RetTy = CallInfo.getReturnType(); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 705 | const ABIArgInfo &RetAI = CallInfo.getReturnInfo(); |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 706 | |
| 707 | |
| 708 | // If the call returns a temporary with struct return, create a temporary |
| 709 | // alloca to hold the result. |
| 710 | if (CGM.ReturnTypeUsesSret(CallInfo)) |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 711 | Args.push_back(CreateTempAlloca(ConvertTypeForMem(RetTy))); |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 712 | |
Daniel Dunbar | 4b5f0a4 | 2009-02-04 21:17:21 +0000 | [diff] [blame] | 713 | assert(CallInfo.arg_size() == CallArgs.size() && |
| 714 | "Mismatch between function signature & arguments."); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 715 | CGFunctionInfo::const_arg_iterator info_it = CallInfo.arg_begin(); |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 716 | for (CallArgList::const_iterator I = CallArgs.begin(), E = CallArgs.end(); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 717 | I != E; ++I, ++info_it) { |
| 718 | const ABIArgInfo &ArgInfo = info_it->info; |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 719 | RValue RV = I->first; |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 720 | |
| 721 | switch (ArgInfo.getKind()) { |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 722 | case ABIArgInfo::Indirect: |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 723 | if (RV.isScalar() || RV.isComplex()) { |
| 724 | // Make a temporary alloca to pass the argument. |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 725 | Args.push_back(CreateTempAlloca(ConvertTypeForMem(I->second))); |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 726 | if (RV.isScalar()) |
Anders Carlsson | b4aa466 | 2009-05-19 18:50:41 +0000 | [diff] [blame] | 727 | EmitStoreOfScalar(RV.getScalarVal(), Args.back(), false, I->second); |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 728 | else |
| 729 | StoreComplexToAddr(RV.getComplexVal(), Args.back(), false); |
| 730 | } else { |
| 731 | Args.push_back(RV.getAggregateAddr()); |
| 732 | } |
| 733 | break; |
| 734 | |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 735 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 736 | case ABIArgInfo::Direct: |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 737 | if (RV.isScalar()) { |
| 738 | Args.push_back(RV.getScalarVal()); |
| 739 | } else if (RV.isComplex()) { |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 740 | llvm::Value *Tmp = llvm::UndefValue::get(ConvertType(I->second)); |
| 741 | Tmp = Builder.CreateInsertValue(Tmp, RV.getComplexVal().first, 0); |
| 742 | Tmp = Builder.CreateInsertValue(Tmp, RV.getComplexVal().second, 1); |
| 743 | Args.push_back(Tmp); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 744 | } else { |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 745 | Args.push_back(Builder.CreateLoad(RV.getAggregateAddr())); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 746 | } |
| 747 | break; |
| 748 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 749 | case ABIArgInfo::Ignore: |
| 750 | break; |
| 751 | |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 752 | case ABIArgInfo::Coerce: { |
| 753 | // FIXME: Avoid the conversion through memory if possible. |
| 754 | llvm::Value *SrcPtr; |
| 755 | if (RV.isScalar()) { |
Daniel Dunbar | 5a1be6e | 2009-02-03 23:04:57 +0000 | [diff] [blame] | 756 | SrcPtr = CreateTempAlloca(ConvertTypeForMem(I->second), "coerce"); |
Anders Carlsson | b4aa466 | 2009-05-19 18:50:41 +0000 | [diff] [blame] | 757 | EmitStoreOfScalar(RV.getScalarVal(), SrcPtr, false, I->second); |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 758 | } else if (RV.isComplex()) { |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 759 | SrcPtr = CreateTempAlloca(ConvertTypeForMem(I->second), "coerce"); |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 760 | StoreComplexToAddr(RV.getComplexVal(), SrcPtr, false); |
| 761 | } else |
| 762 | SrcPtr = RV.getAggregateAddr(); |
| 763 | Args.push_back(CreateCoercedLoad(SrcPtr, ArgInfo.getCoerceToType(), |
| 764 | *this)); |
| 765 | break; |
| 766 | } |
| 767 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 768 | case ABIArgInfo::Expand: |
| 769 | ExpandTypeToArgs(I->second, RV, Args); |
| 770 | break; |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 771 | } |
| 772 | } |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 773 | |
| 774 | // If the callee is a bitcast of a function to a varargs pointer to function |
| 775 | // type, check to see if we can remove the bitcast. This handles some cases |
| 776 | // with unprototyped functions. |
| 777 | if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Callee)) |
| 778 | if (llvm::Function *CalleeF = dyn_cast<llvm::Function>(CE->getOperand(0))) { |
| 779 | const llvm::PointerType *CurPT=cast<llvm::PointerType>(Callee->getType()); |
| 780 | const llvm::FunctionType *CurFT = |
| 781 | cast<llvm::FunctionType>(CurPT->getElementType()); |
| 782 | const llvm::FunctionType *ActualFT = CalleeF->getFunctionType(); |
| 783 | |
| 784 | if (CE->getOpcode() == llvm::Instruction::BitCast && |
| 785 | ActualFT->getReturnType() == CurFT->getReturnType() && |
Chris Lattner | d6bebbf | 2009-06-23 01:38:41 +0000 | [diff] [blame] | 786 | ActualFT->getNumParams() == CurFT->getNumParams() && |
| 787 | ActualFT->getNumParams() == Args.size()) { |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 788 | bool ArgsMatch = true; |
| 789 | for (unsigned i = 0, e = ActualFT->getNumParams(); i != e; ++i) |
| 790 | if (ActualFT->getParamType(i) != CurFT->getParamType(i)) { |
| 791 | ArgsMatch = false; |
| 792 | break; |
| 793 | } |
| 794 | |
| 795 | // Strip the cast if we can get away with it. This is a nice cleanup, |
| 796 | // but also allows us to inline the function at -O0 if it is marked |
| 797 | // always_inline. |
| 798 | if (ArgsMatch) |
| 799 | Callee = CalleeF; |
| 800 | } |
| 801 | } |
| 802 | |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 803 | |
Daniel Dunbar | 9834ffb | 2009-02-23 17:26:39 +0000 | [diff] [blame] | 804 | llvm::BasicBlock *InvokeDest = getInvokeDest(); |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 805 | CodeGen::AttributeListType AttributeList; |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 806 | CGM.ConstructAttributeList(CallInfo, TargetDecl, AttributeList); |
Daniel Dunbar | 9834ffb | 2009-02-23 17:26:39 +0000 | [diff] [blame] | 807 | llvm::AttrListPtr Attrs = llvm::AttrListPtr::get(AttributeList.begin(), |
| 808 | AttributeList.end()); |
Daniel Dunbar | 725ad31 | 2009-01-31 02:19:00 +0000 | [diff] [blame] | 809 | |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 810 | llvm::CallSite CS; |
| 811 | if (!InvokeDest || (Attrs.getFnAttributes() & llvm::Attribute::NoUnwind)) { |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 812 | CS = Builder.CreateCall(Callee, Args.data(), Args.data()+Args.size()); |
Daniel Dunbar | 9834ffb | 2009-02-23 17:26:39 +0000 | [diff] [blame] | 813 | } else { |
| 814 | llvm::BasicBlock *Cont = createBasicBlock("invoke.cont"); |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 815 | CS = Builder.CreateInvoke(Callee, Cont, InvokeDest, |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 816 | Args.data(), Args.data()+Args.size()); |
Daniel Dunbar | 9834ffb | 2009-02-23 17:26:39 +0000 | [diff] [blame] | 817 | EmitBlock(Cont); |
Daniel Dunbar | f4fe0f0 | 2009-02-20 18:54:31 +0000 | [diff] [blame] | 818 | } |
| 819 | |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 820 | CS.setAttributes(Attrs); |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 821 | if (const llvm::Function *F = |
| 822 | dyn_cast<llvm::Function>(Callee->stripPointerCasts())) |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 823 | CS.setCallingConv(F->getCallingConv()); |
| 824 | |
| 825 | // If the call doesn't return, finish the basic block and clear the |
| 826 | // insertion point; this allows the rest of IRgen to discard |
| 827 | // unreachable code. |
| 828 | if (CS.doesNotReturn()) { |
| 829 | Builder.CreateUnreachable(); |
| 830 | Builder.ClearInsertionPoint(); |
| 831 | |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 832 | // FIXME: For now, emit a dummy basic block because expr emitters in |
| 833 | // generally are not ready to handle emitting expressions at unreachable |
| 834 | // points. |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 835 | EnsureInsertPoint(); |
| 836 | |
| 837 | // Return a reasonable RValue. |
| 838 | return GetUndefRValue(RetTy); |
| 839 | } |
| 840 | |
| 841 | llvm::Instruction *CI = CS.getInstruction(); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 842 | if (Builder.isNamePreserving() && CI->getType() != llvm::Type::VoidTy) |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 843 | CI->setName("call"); |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 844 | |
| 845 | switch (RetAI.getKind()) { |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 846 | case ABIArgInfo::Indirect: |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 847 | if (RetTy->isAnyComplexType()) |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 848 | return RValue::getComplex(LoadComplexFromAddr(Args[0], false)); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 849 | if (CodeGenFunction::hasAggregateLLVMType(RetTy)) |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 850 | return RValue::getAggregate(Args[0]); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 851 | return RValue::get(EmitLoadOfScalar(Args[0], false, RetTy)); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 852 | |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 853 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 854 | case ABIArgInfo::Direct: |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 855 | if (RetTy->isAnyComplexType()) { |
| 856 | llvm::Value *Real = Builder.CreateExtractValue(CI, 0); |
| 857 | llvm::Value *Imag = Builder.CreateExtractValue(CI, 1); |
| 858 | return RValue::getComplex(std::make_pair(Real, Imag)); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 859 | } |
| 860 | if (CodeGenFunction::hasAggregateLLVMType(RetTy)) { |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 861 | llvm::Value *V = CreateTempAlloca(ConvertTypeForMem(RetTy), "agg.tmp"); |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 862 | Builder.CreateStore(CI, V); |
| 863 | return RValue::getAggregate(V); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 864 | } |
| 865 | return RValue::get(CI); |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 866 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 867 | case ABIArgInfo::Ignore: |
Daniel Dunbar | 0bcc521 | 2009-02-03 06:30:17 +0000 | [diff] [blame] | 868 | // If we are ignoring an argument that had a result, make sure to |
| 869 | // construct the appropriate return value for our caller. |
Daniel Dunbar | 13e8173 | 2009-02-05 07:09:07 +0000 | [diff] [blame] | 870 | return GetUndefRValue(RetTy); |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 871 | |
Daniel Dunbar | 639ffe4 | 2008-09-10 07:04:09 +0000 | [diff] [blame] | 872 | case ABIArgInfo::Coerce: { |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 873 | // FIXME: Avoid the conversion through memory if possible. |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 874 | llvm::Value *V = CreateTempAlloca(ConvertTypeForMem(RetTy), "coerce"); |
Daniel Dunbar | 54d1ccb | 2009-01-27 01:36:03 +0000 | [diff] [blame] | 875 | CreateCoercedStore(CI, V, *this); |
Anders Carlsson | ad3d691 | 2008-11-25 22:21:48 +0000 | [diff] [blame] | 876 | if (RetTy->isAnyComplexType()) |
| 877 | return RValue::getComplex(LoadComplexFromAddr(V, false)); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 878 | if (CodeGenFunction::hasAggregateLLVMType(RetTy)) |
Anders Carlsson | ad3d691 | 2008-11-25 22:21:48 +0000 | [diff] [blame] | 879 | return RValue::getAggregate(V); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 880 | return RValue::get(EmitLoadOfScalar(V, false, RetTy)); |
Daniel Dunbar | 639ffe4 | 2008-09-10 07:04:09 +0000 | [diff] [blame] | 881 | } |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 882 | |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 883 | case ABIArgInfo::Expand: |
| 884 | assert(0 && "Invalid ABI kind for return argument"); |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 885 | } |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 886 | |
| 887 | assert(0 && "Unhandled ABIArgInfo::Kind"); |
| 888 | return RValue::get(0); |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 889 | } |
Daniel Dunbar | b4094ea | 2009-02-10 20:44:09 +0000 | [diff] [blame] | 890 | |
| 891 | /* VarArg handling */ |
| 892 | |
| 893 | llvm::Value *CodeGenFunction::EmitVAArg(llvm::Value *VAListAddr, QualType Ty) { |
| 894 | return CGM.getTypes().getABIInfo().EmitVAArg(VAListAddr, Ty, *this); |
| 895 | } |