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" |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 22 | #include "clang/CodeGen/CodeGenOptions.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 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +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 | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 38 | // FIXME: Set calling convention correctly, it needs to be associated with the |
| 39 | // type somehow. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 40 | return getFunctionInfo(FTNP->getResultType(), |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 41 | llvm::SmallVector<QualType, 16>(), 0); |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 42 | } |
| 43 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 44 | const |
Douglas Gregor | 72564e7 | 2009-02-26 23:50:07 +0000 | [diff] [blame] | 45 | CGFunctionInfo &CodeGenTypes::getFunctionInfo(const FunctionProtoType *FTP) { |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 46 | llvm::SmallVector<QualType, 16> ArgTys; |
| 47 | // FIXME: Kill copy. |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 48 | for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i) |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 49 | ArgTys.push_back(FTP->getArgType(i)); |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 50 | // FIXME: Set calling convention correctly, it needs to be associated with the |
| 51 | // type somehow. |
| 52 | return getFunctionInfo(FTP->getResultType(), ArgTys, 0); |
| 53 | } |
| 54 | |
| 55 | static unsigned getCallingConventionForDecl(const Decl *D) { |
| 56 | // Set the appropriate calling convention for the Function. |
| 57 | if (D->hasAttr<StdCallAttr>()) |
| 58 | return llvm::CallingConv::X86_StdCall; |
| 59 | |
| 60 | if (D->hasAttr<FastCallAttr>()) |
| 61 | return llvm::CallingConv::X86_FastCall; |
| 62 | |
| 63 | return llvm::CallingConv::C; |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 64 | } |
| 65 | |
Anders Carlsson | 375c31c | 2009-10-03 19:43:08 +0000 | [diff] [blame] | 66 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const CXXRecordDecl *RD, |
| 67 | const FunctionProtoType *FTP) { |
| 68 | llvm::SmallVector<QualType, 16> ArgTys; |
| 69 | |
| 70 | // Add the 'this' pointer. |
| 71 | ArgTys.push_back(Context.getPointerType(Context.getTagDeclType(RD))); |
| 72 | |
| 73 | for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i) |
| 74 | ArgTys.push_back(FTP->getArgType(i)); |
| 75 | |
| 76 | // FIXME: Set calling convention correctly, it needs to be associated with the |
| 77 | // type somehow. |
| 78 | return getFunctionInfo(FTP->getResultType(), ArgTys, 0); |
| 79 | } |
| 80 | |
Anders Carlsson | f6f8ae5 | 2009-04-03 22:48:58 +0000 | [diff] [blame] | 81 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const CXXMethodDecl *MD) { |
| 82 | llvm::SmallVector<QualType, 16> ArgTys; |
Chris Lattner | 3eb67ca | 2009-05-12 20:27:19 +0000 | [diff] [blame] | 83 | // Add the 'this' pointer unless this is a static method. |
| 84 | if (MD->isInstance()) |
| 85 | ArgTys.push_back(MD->getThisType(Context)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 86 | |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 87 | const FunctionProtoType *FTP = MD->getType()->getAs<FunctionProtoType>(); |
Anders Carlsson | f6f8ae5 | 2009-04-03 22:48:58 +0000 | [diff] [blame] | 88 | for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i) |
| 89 | ArgTys.push_back(FTP->getArgType(i)); |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 90 | return getFunctionInfo(FTP->getResultType(), ArgTys, |
| 91 | getCallingConventionForDecl(MD)); |
Anders Carlsson | f6f8ae5 | 2009-04-03 22:48:58 +0000 | [diff] [blame] | 92 | } |
| 93 | |
Anders Carlsson | f6c56e2 | 2009-11-25 03:15:49 +0000 | [diff] [blame] | 94 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const CXXConstructorDecl *D, |
| 95 | CXXCtorType Type) { |
| 96 | llvm::SmallVector<QualType, 16> ArgTys; |
| 97 | |
| 98 | // Add the 'this' pointer. |
| 99 | ArgTys.push_back(D->getThisType(Context)); |
| 100 | |
| 101 | // Check if we need to add a VTT parameter (which has type void **). |
| 102 | if (Type == Ctor_Base && D->getParent()->getNumVBases() != 0) |
| 103 | ArgTys.push_back(Context.getPointerType(Context.VoidPtrTy)); |
| 104 | |
| 105 | const FunctionProtoType *FTP = D->getType()->getAs<FunctionProtoType>(); |
| 106 | for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i) |
| 107 | ArgTys.push_back(FTP->getArgType(i)); |
| 108 | return getFunctionInfo(FTP->getResultType(), ArgTys, |
| 109 | getCallingConventionForDecl(D)); |
| 110 | } |
| 111 | |
| 112 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const CXXDestructorDecl *D, |
| 113 | CXXDtorType Type) { |
| 114 | llvm::SmallVector<QualType, 16> ArgTys; |
| 115 | |
| 116 | // Add the 'this' pointer. |
| 117 | ArgTys.push_back(D->getThisType(Context)); |
| 118 | |
| 119 | // Check if we need to add a VTT parameter (which has type void **). |
| 120 | if (Type == Dtor_Base && D->getParent()->getNumVBases() != 0) |
| 121 | ArgTys.push_back(Context.getPointerType(Context.VoidPtrTy)); |
| 122 | |
| 123 | const FunctionProtoType *FTP = D->getType()->getAs<FunctionProtoType>(); |
| 124 | for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i) |
| 125 | ArgTys.push_back(FTP->getArgType(i)); |
| 126 | return getFunctionInfo(FTP->getResultType(), ArgTys, |
| 127 | getCallingConventionForDecl(D)); |
| 128 | } |
| 129 | |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 130 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const FunctionDecl *FD) { |
Chris Lattner | 3eb67ca | 2009-05-12 20:27:19 +0000 | [diff] [blame] | 131 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) |
Anders Carlsson | f6f8ae5 | 2009-04-03 22:48:58 +0000 | [diff] [blame] | 132 | if (MD->isInstance()) |
| 133 | return getFunctionInfo(MD); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 134 | |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 135 | unsigned CallingConvention = getCallingConventionForDecl(FD); |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 136 | const FunctionType *FTy = FD->getType()->getAs<FunctionType>(); |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 137 | if (const FunctionNoProtoType *FNTP = dyn_cast<FunctionNoProtoType>(FTy)) |
| 138 | return getFunctionInfo(FNTP->getResultType(), |
| 139 | llvm::SmallVector<QualType, 16>(), |
| 140 | CallingConvention); |
| 141 | |
| 142 | const FunctionProtoType *FPT = cast<FunctionProtoType>(FTy); |
| 143 | llvm::SmallVector<QualType, 16> ArgTys; |
| 144 | // FIXME: Kill copy. |
| 145 | for (unsigned i = 0, e = FPT->getNumArgs(); i != e; ++i) |
| 146 | ArgTys.push_back(FPT->getArgType(i)); |
| 147 | return getFunctionInfo(FPT->getResultType(), ArgTys, CallingConvention); |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 148 | } |
| 149 | |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 150 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const ObjCMethodDecl *MD) { |
| 151 | llvm::SmallVector<QualType, 16> ArgTys; |
| 152 | ArgTys.push_back(MD->getSelfDecl()->getType()); |
| 153 | ArgTys.push_back(Context.getObjCSelType()); |
| 154 | // FIXME: Kill copy? |
Chris Lattner | 2073216 | 2009-02-20 06:23:21 +0000 | [diff] [blame] | 155 | for (ObjCMethodDecl::param_iterator i = MD->param_begin(), |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 156 | e = MD->param_end(); i != e; ++i) |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 157 | ArgTys.push_back((*i)->getType()); |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 158 | return getFunctionInfo(MD->getResultType(), ArgTys, |
| 159 | getCallingConventionForDecl(MD)); |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 160 | } |
| 161 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 162 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(QualType ResTy, |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 163 | const CallArgList &Args, |
| 164 | unsigned CallingConvention){ |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 165 | // FIXME: Kill copy. |
| 166 | llvm::SmallVector<QualType, 16> ArgTys; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 167 | for (CallArgList::const_iterator i = Args.begin(), e = Args.end(); |
Daniel Dunbar | 725ad31 | 2009-01-31 02:19:00 +0000 | [diff] [blame] | 168 | i != e; ++i) |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 169 | ArgTys.push_back(i->second); |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 170 | return getFunctionInfo(ResTy, ArgTys, CallingConvention); |
Daniel Dunbar | 725ad31 | 2009-01-31 02:19:00 +0000 | [diff] [blame] | 171 | } |
| 172 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 173 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(QualType ResTy, |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 174 | const FunctionArgList &Args, |
| 175 | unsigned CallingConvention){ |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 176 | // FIXME: Kill copy. |
| 177 | llvm::SmallVector<QualType, 16> ArgTys; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 178 | for (FunctionArgList::const_iterator i = Args.begin(), e = Args.end(); |
Daniel Dunbar | bb36d33 | 2009-02-02 21:43:58 +0000 | [diff] [blame] | 179 | i != e; ++i) |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 180 | ArgTys.push_back(i->second); |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 181 | return getFunctionInfo(ResTy, ArgTys, CallingConvention); |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(QualType ResTy, |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 185 | const llvm::SmallVector<QualType, 16> &ArgTys, |
| 186 | unsigned CallingConvention){ |
Daniel Dunbar | 40a6be6 | 2009-02-03 00:07:12 +0000 | [diff] [blame] | 187 | // Lookup or create unique function info. |
| 188 | llvm::FoldingSetNodeID ID; |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 189 | CGFunctionInfo::Profile(ID, CallingConvention, ResTy, |
| 190 | ArgTys.begin(), ArgTys.end()); |
Daniel Dunbar | 40a6be6 | 2009-02-03 00:07:12 +0000 | [diff] [blame] | 191 | |
| 192 | void *InsertPos = 0; |
| 193 | CGFunctionInfo *FI = FunctionInfos.FindNodeOrInsertPos(ID, InsertPos); |
| 194 | if (FI) |
| 195 | return *FI; |
| 196 | |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 197 | // Construct the function info. |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 198 | FI = new CGFunctionInfo(CallingConvention, ResTy, ArgTys); |
Daniel Dunbar | 35e67d4 | 2009-02-05 00:00:23 +0000 | [diff] [blame] | 199 | FunctionInfos.InsertNode(FI, InsertPos); |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 200 | |
| 201 | // Compute ABI information. |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 202 | getABIInfo().computeInfo(*FI, getContext(), TheModule.getContext()); |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 203 | |
Daniel Dunbar | 40a6be6 | 2009-02-03 00:07:12 +0000 | [diff] [blame] | 204 | return *FI; |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 205 | } |
| 206 | |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 207 | CGFunctionInfo::CGFunctionInfo(unsigned _CallingConvention, |
| 208 | QualType ResTy, |
| 209 | const llvm::SmallVector<QualType, 16> &ArgTys) |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 210 | : CallingConvention(_CallingConvention), |
| 211 | EffectiveCallingConvention(_CallingConvention) |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 212 | { |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 213 | NumArgs = ArgTys.size(); |
| 214 | Args = new ArgInfo[1 + NumArgs]; |
| 215 | Args[0].type = ResTy; |
| 216 | for (unsigned i = 0; i < NumArgs; ++i) |
| 217 | Args[1 + i].type = ArgTys[i]; |
| 218 | } |
| 219 | |
| 220 | /***/ |
| 221 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 222 | void CodeGenTypes::GetExpandedTypes(QualType Ty, |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 223 | std::vector<const llvm::Type*> &ArgTys) { |
| 224 | const RecordType *RT = Ty->getAsStructureType(); |
| 225 | assert(RT && "Can only expand structure types."); |
| 226 | const RecordDecl *RD = RT->getDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 227 | assert(!RD->hasFlexibleArrayMember() && |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 228 | "Cannot expand structure with flexible array."); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 229 | |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 230 | for (RecordDecl::field_iterator i = RD->field_begin(), e = RD->field_end(); |
| 231 | i != e; ++i) { |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 232 | const FieldDecl *FD = *i; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 233 | assert(!FD->isBitField() && |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 234 | "Cannot expand structure with bit-field members."); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 235 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 236 | QualType FT = FD->getType(); |
| 237 | if (CodeGenFunction::hasAggregateLLVMType(FT)) { |
| 238 | GetExpandedTypes(FT, ArgTys); |
| 239 | } else { |
| 240 | ArgTys.push_back(ConvertType(FT)); |
| 241 | } |
| 242 | } |
| 243 | } |
| 244 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 245 | llvm::Function::arg_iterator |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 246 | CodeGenFunction::ExpandTypeFromArgs(QualType Ty, LValue LV, |
| 247 | llvm::Function::arg_iterator AI) { |
| 248 | const RecordType *RT = Ty->getAsStructureType(); |
| 249 | assert(RT && "Can only expand structure types."); |
| 250 | |
| 251 | RecordDecl *RD = RT->getDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 252 | assert(LV.isSimple() && |
| 253 | "Unexpected non-simple lvalue during struct expansion."); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 254 | llvm::Value *Addr = LV.getAddress(); |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 255 | for (RecordDecl::field_iterator i = RD->field_begin(), e = RD->field_end(); |
| 256 | i != e; ++i) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 257 | FieldDecl *FD = *i; |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 258 | QualType FT = FD->getType(); |
| 259 | |
| 260 | // FIXME: What are the right qualifiers here? |
Anders Carlsson | e6d2a53 | 2010-01-29 05:05:36 +0000 | [diff] [blame^] | 261 | LValue LV = EmitLValueForField(Addr, FD, 0); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 262 | if (CodeGenFunction::hasAggregateLLVMType(FT)) { |
| 263 | AI = ExpandTypeFromArgs(FT, LV, AI); |
| 264 | } else { |
| 265 | EmitStoreThroughLValue(RValue::get(AI), LV, FT); |
| 266 | ++AI; |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | return AI; |
| 271 | } |
| 272 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 273 | void |
| 274 | CodeGenFunction::ExpandTypeToArgs(QualType Ty, RValue RV, |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 275 | llvm::SmallVector<llvm::Value*, 16> &Args) { |
| 276 | const RecordType *RT = Ty->getAsStructureType(); |
| 277 | assert(RT && "Can only expand structure types."); |
| 278 | |
| 279 | RecordDecl *RD = RT->getDecl(); |
| 280 | assert(RV.isAggregate() && "Unexpected rvalue during struct expansion"); |
| 281 | llvm::Value *Addr = RV.getAggregateAddr(); |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 282 | for (RecordDecl::field_iterator i = RD->field_begin(), e = RD->field_end(); |
| 283 | i != e; ++i) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 284 | FieldDecl *FD = *i; |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 285 | QualType FT = FD->getType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 286 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 287 | // FIXME: What are the right qualifiers here? |
Anders Carlsson | e6d2a53 | 2010-01-29 05:05:36 +0000 | [diff] [blame^] | 288 | LValue LV = EmitLValueForField(Addr, FD, 0); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 289 | if (CodeGenFunction::hasAggregateLLVMType(FT)) { |
| 290 | ExpandTypeToArgs(FT, RValue::getAggregate(LV.getAddress()), Args); |
| 291 | } else { |
| 292 | RValue RV = EmitLoadOfLValue(LV, FT); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 293 | assert(RV.isScalar() && |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 294 | "Unexpected non-scalar rvalue during struct expansion."); |
| 295 | Args.push_back(RV.getScalarVal()); |
| 296 | } |
| 297 | } |
| 298 | } |
| 299 | |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 300 | /// CreateCoercedLoad - Create a load from \arg SrcPtr interpreted as |
| 301 | /// a pointer to an object of type \arg Ty. |
| 302 | /// |
| 303 | /// This safely handles the case when the src type is smaller than the |
| 304 | /// destination type; in this situation the values of bits which not |
| 305 | /// present in the src are undefined. |
| 306 | static llvm::Value *CreateCoercedLoad(llvm::Value *SrcPtr, |
| 307 | const llvm::Type *Ty, |
| 308 | CodeGenFunction &CGF) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 309 | const llvm::Type *SrcTy = |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 310 | cast<llvm::PointerType>(SrcPtr->getType())->getElementType(); |
Duncan Sands | 9408c45 | 2009-05-09 07:08:47 +0000 | [diff] [blame] | 311 | uint64_t SrcSize = CGF.CGM.getTargetData().getTypeAllocSize(SrcTy); |
| 312 | uint64_t DstSize = CGF.CGM.getTargetData().getTypeAllocSize(Ty); |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 313 | |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 314 | // If load is legal, just bitcast the src pointer. |
Daniel Dunbar | 7ef455b | 2009-05-13 18:54:26 +0000 | [diff] [blame] | 315 | if (SrcSize >= DstSize) { |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 316 | // Generally SrcSize is never greater than DstSize, since this means we are |
| 317 | // losing bits. However, this can happen in cases where the structure has |
| 318 | // additional padding, for example due to a user specified alignment. |
Daniel Dunbar | 7ef455b | 2009-05-13 18:54:26 +0000 | [diff] [blame] | 319 | // |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 320 | // FIXME: Assert that we aren't truncating non-padding bits when have access |
| 321 | // to that information. |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 322 | llvm::Value *Casted = |
| 323 | CGF.Builder.CreateBitCast(SrcPtr, llvm::PointerType::getUnqual(Ty)); |
Daniel Dunbar | 386621f | 2009-02-07 02:46:03 +0000 | [diff] [blame] | 324 | llvm::LoadInst *Load = CGF.Builder.CreateLoad(Casted); |
| 325 | // FIXME: Use better alignment / avoid requiring aligned load. |
| 326 | Load->setAlignment(1); |
| 327 | return Load; |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 328 | } else { |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 329 | // Otherwise do coercion through memory. This is stupid, but |
| 330 | // simple. |
| 331 | llvm::Value *Tmp = CGF.CreateTempAlloca(Ty); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 332 | llvm::Value *Casted = |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 333 | CGF.Builder.CreateBitCast(Tmp, llvm::PointerType::getUnqual(SrcTy)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 334 | llvm::StoreInst *Store = |
Daniel Dunbar | 386621f | 2009-02-07 02:46:03 +0000 | [diff] [blame] | 335 | CGF.Builder.CreateStore(CGF.Builder.CreateLoad(SrcPtr), Casted); |
| 336 | // FIXME: Use better alignment / avoid requiring aligned store. |
| 337 | Store->setAlignment(1); |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 338 | return CGF.Builder.CreateLoad(Tmp); |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | /// CreateCoercedStore - Create a store to \arg DstPtr from \arg Src, |
| 343 | /// where the source and destination may have different types. |
| 344 | /// |
| 345 | /// This safely handles the case when the src type is larger than the |
| 346 | /// destination type; the upper bits of the src will be lost. |
| 347 | static void CreateCoercedStore(llvm::Value *Src, |
| 348 | llvm::Value *DstPtr, |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 349 | bool DstIsVolatile, |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 350 | CodeGenFunction &CGF) { |
| 351 | const llvm::Type *SrcTy = Src->getType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 352 | const llvm::Type *DstTy = |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 353 | cast<llvm::PointerType>(DstPtr->getType())->getElementType(); |
| 354 | |
Duncan Sands | 9408c45 | 2009-05-09 07:08:47 +0000 | [diff] [blame] | 355 | uint64_t SrcSize = CGF.CGM.getTargetData().getTypeAllocSize(SrcTy); |
| 356 | uint64_t DstSize = CGF.CGM.getTargetData().getTypeAllocSize(DstTy); |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 357 | |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 358 | // If store is legal, just bitcast the src pointer. |
Daniel Dunbar | fdf4986 | 2009-06-05 07:58:54 +0000 | [diff] [blame] | 359 | if (SrcSize <= DstSize) { |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 360 | llvm::Value *Casted = |
| 361 | CGF.Builder.CreateBitCast(DstPtr, llvm::PointerType::getUnqual(SrcTy)); |
Daniel Dunbar | 386621f | 2009-02-07 02:46:03 +0000 | [diff] [blame] | 362 | // FIXME: Use better alignment / avoid requiring aligned store. |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 363 | CGF.Builder.CreateStore(Src, Casted, DstIsVolatile)->setAlignment(1); |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 364 | } else { |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 365 | // Otherwise do coercion through memory. This is stupid, but |
| 366 | // simple. |
Daniel Dunbar | fdf4986 | 2009-06-05 07:58:54 +0000 | [diff] [blame] | 367 | |
| 368 | // Generally SrcSize is never greater than DstSize, since this means we are |
| 369 | // losing bits. However, this can happen in cases where the structure has |
| 370 | // additional padding, for example due to a user specified alignment. |
| 371 | // |
| 372 | // FIXME: Assert that we aren't truncating non-padding bits when have access |
| 373 | // to that information. |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 374 | llvm::Value *Tmp = CGF.CreateTempAlloca(SrcTy); |
| 375 | CGF.Builder.CreateStore(Src, Tmp); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 376 | llvm::Value *Casted = |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 377 | CGF.Builder.CreateBitCast(Tmp, llvm::PointerType::getUnqual(DstTy)); |
Daniel Dunbar | 386621f | 2009-02-07 02:46:03 +0000 | [diff] [blame] | 378 | llvm::LoadInst *Load = CGF.Builder.CreateLoad(Casted); |
| 379 | // FIXME: Use better alignment / avoid requiring aligned load. |
| 380 | Load->setAlignment(1); |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 381 | CGF.Builder.CreateStore(Load, DstPtr, DstIsVolatile); |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 382 | } |
| 383 | } |
| 384 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 385 | /***/ |
| 386 | |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 387 | bool CodeGenModule::ReturnTypeUsesSret(const CGFunctionInfo &FI) { |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 388 | return FI.getReturnInfo().isIndirect(); |
Daniel Dunbar | bb36d33 | 2009-02-02 21:43:58 +0000 | [diff] [blame] | 389 | } |
| 390 | |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 391 | const llvm::FunctionType * |
Daniel Dunbar | bb36d33 | 2009-02-02 21:43:58 +0000 | [diff] [blame] | 392 | CodeGenTypes::GetFunctionType(const CGFunctionInfo &FI, bool IsVariadic) { |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 393 | std::vector<const llvm::Type*> ArgTys; |
| 394 | |
| 395 | const llvm::Type *ResultType = 0; |
| 396 | |
Daniel Dunbar | a0a99e0 | 2009-02-02 23:43:58 +0000 | [diff] [blame] | 397 | QualType RetTy = FI.getReturnType(); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 398 | const ABIArgInfo &RetAI = FI.getReturnInfo(); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 399 | switch (RetAI.getKind()) { |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 400 | case ABIArgInfo::Expand: |
| 401 | assert(0 && "Invalid ABI kind for return argument"); |
| 402 | |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 403 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 404 | case ABIArgInfo::Direct: |
| 405 | ResultType = ConvertType(RetTy); |
| 406 | break; |
| 407 | |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 408 | case ABIArgInfo::Indirect: { |
| 409 | assert(!RetAI.getIndirectAlign() && "Align unused on indirect return."); |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 410 | ResultType = llvm::Type::getVoidTy(getLLVMContext()); |
Daniel Dunbar | 62d5c1b | 2008-09-10 07:00:50 +0000 | [diff] [blame] | 411 | const llvm::Type *STy = ConvertType(RetTy); |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 412 | ArgTys.push_back(llvm::PointerType::get(STy, RetTy.getAddressSpace())); |
| 413 | break; |
| 414 | } |
| 415 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 416 | case ABIArgInfo::Ignore: |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 417 | ResultType = llvm::Type::getVoidTy(getLLVMContext()); |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 418 | break; |
| 419 | |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 420 | case ABIArgInfo::Coerce: |
Daniel Dunbar | 639ffe4 | 2008-09-10 07:04:09 +0000 | [diff] [blame] | 421 | ResultType = RetAI.getCoerceToType(); |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 422 | break; |
| 423 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 424 | |
| 425 | for (CGFunctionInfo::const_arg_iterator it = FI.arg_begin(), |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 426 | ie = FI.arg_end(); it != ie; ++it) { |
| 427 | const ABIArgInfo &AI = it->info; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 428 | |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 429 | switch (AI.getKind()) { |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 430 | case ABIArgInfo::Ignore: |
| 431 | break; |
| 432 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 433 | case ABIArgInfo::Coerce: |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 434 | ArgTys.push_back(AI.getCoerceToType()); |
| 435 | break; |
| 436 | |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 437 | case ABIArgInfo::Indirect: { |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 438 | // indirect arguments are always on the stack, which is addr space #0. |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 439 | const llvm::Type *LTy = ConvertTypeForMem(it->type); |
| 440 | ArgTys.push_back(llvm::PointerType::getUnqual(LTy)); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 441 | break; |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 442 | } |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 443 | |
| 444 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 445 | case ABIArgInfo::Direct: |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 446 | ArgTys.push_back(ConvertType(it->type)); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 447 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 448 | |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 449 | case ABIArgInfo::Expand: |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 450 | GetExpandedTypes(it->type, ArgTys); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 451 | break; |
| 452 | } |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 453 | } |
| 454 | |
Daniel Dunbar | bb36d33 | 2009-02-02 21:43:58 +0000 | [diff] [blame] | 455 | return llvm::FunctionType::get(ResultType, ArgTys, IsVariadic); |
Daniel Dunbar | 3913f18 | 2008-09-09 23:48:28 +0000 | [diff] [blame] | 456 | } |
| 457 | |
Anders Carlsson | ecf282b | 2009-11-24 05:08:52 +0000 | [diff] [blame] | 458 | static bool HasIncompleteReturnTypeOrArgumentTypes(const FunctionProtoType *T) { |
| 459 | if (const TagType *TT = T->getResultType()->getAs<TagType>()) { |
| 460 | if (!TT->getDecl()->isDefinition()) |
| 461 | return true; |
| 462 | } |
| 463 | |
| 464 | for (unsigned i = 0, e = T->getNumArgs(); i != e; ++i) { |
| 465 | if (const TagType *TT = T->getArgType(i)->getAs<TagType>()) { |
| 466 | if (!TT->getDecl()->isDefinition()) |
| 467 | return true; |
| 468 | } |
| 469 | } |
| 470 | |
| 471 | return false; |
| 472 | } |
| 473 | |
| 474 | const llvm::Type * |
| 475 | CodeGenTypes::GetFunctionTypeForVtable(const CXXMethodDecl *MD) { |
| 476 | const FunctionProtoType *FPT = MD->getType()->getAs<FunctionProtoType>(); |
| 477 | |
| 478 | if (!HasIncompleteReturnTypeOrArgumentTypes(FPT)) |
| 479 | return GetFunctionType(getFunctionInfo(MD), FPT->isVariadic()); |
| 480 | |
| 481 | return llvm::OpaqueType::get(getLLVMContext()); |
| 482 | } |
| 483 | |
Daniel Dunbar | a0a99e0 | 2009-02-02 23:43:58 +0000 | [diff] [blame] | 484 | void CodeGenModule::ConstructAttributeList(const CGFunctionInfo &FI, |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 485 | const Decl *TargetDecl, |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 486 | AttributeListType &PAL, |
| 487 | unsigned &CallingConv) { |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 488 | unsigned FuncAttrs = 0; |
Devang Patel | a2c6912 | 2008-09-26 22:53:57 +0000 | [diff] [blame] | 489 | unsigned RetAttrs = 0; |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 490 | |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 491 | CallingConv = FI.getEffectiveCallingConvention(); |
| 492 | |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 493 | // FIXME: handle sseregparm someday... |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 494 | if (TargetDecl) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 495 | if (TargetDecl->hasAttr<NoThrowAttr>()) |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 496 | FuncAttrs |= llvm::Attribute::NoUnwind; |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 497 | if (TargetDecl->hasAttr<NoReturnAttr>()) |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 498 | FuncAttrs |= llvm::Attribute::NoReturn; |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 499 | if (TargetDecl->hasAttr<ConstAttr>()) |
Anders Carlsson | 232eb7d | 2008-10-05 23:32:53 +0000 | [diff] [blame] | 500 | FuncAttrs |= llvm::Attribute::ReadNone; |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 501 | else if (TargetDecl->hasAttr<PureAttr>()) |
Daniel Dunbar | 64c2e07 | 2009-04-10 22:14:52 +0000 | [diff] [blame] | 502 | FuncAttrs |= llvm::Attribute::ReadOnly; |
Ryan Flynn | 76168e2 | 2009-08-09 20:07:29 +0000 | [diff] [blame] | 503 | if (TargetDecl->hasAttr<MallocAttr>()) |
| 504 | RetAttrs |= llvm::Attribute::NoAlias; |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 505 | } |
| 506 | |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 507 | if (CodeGenOpts.OptimizeSize) |
Daniel Dunbar | 7ab1c3e | 2009-10-27 19:48:08 +0000 | [diff] [blame] | 508 | FuncAttrs |= llvm::Attribute::OptimizeForSize; |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 509 | if (CodeGenOpts.DisableRedZone) |
Devang Patel | 24095da | 2009-06-04 23:32:02 +0000 | [diff] [blame] | 510 | FuncAttrs |= llvm::Attribute::NoRedZone; |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 511 | if (CodeGenOpts.NoImplicitFloat) |
Devang Patel | acebb39 | 2009-06-05 22:05:48 +0000 | [diff] [blame] | 512 | FuncAttrs |= llvm::Attribute::NoImplicitFloat; |
Devang Patel | 24095da | 2009-06-04 23:32:02 +0000 | [diff] [blame] | 513 | |
Daniel Dunbar | a0a99e0 | 2009-02-02 23:43:58 +0000 | [diff] [blame] | 514 | QualType RetTy = FI.getReturnType(); |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 515 | unsigned Index = 1; |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 516 | const ABIArgInfo &RetAI = FI.getReturnInfo(); |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 517 | switch (RetAI.getKind()) { |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 518 | case ABIArgInfo::Extend: |
| 519 | if (RetTy->isSignedIntegerType()) { |
| 520 | RetAttrs |= llvm::Attribute::SExt; |
| 521 | } else if (RetTy->isUnsignedIntegerType()) { |
| 522 | RetAttrs |= llvm::Attribute::ZExt; |
| 523 | } |
| 524 | // FALLTHROUGH |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 525 | case ABIArgInfo::Direct: |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 526 | break; |
| 527 | |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 528 | case ABIArgInfo::Indirect: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 529 | PAL.push_back(llvm::AttributeWithIndex::get(Index, |
Daniel Dunbar | 725ad31 | 2009-01-31 02:19:00 +0000 | [diff] [blame] | 530 | llvm::Attribute::StructRet | |
| 531 | llvm::Attribute::NoAlias)); |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 532 | ++Index; |
Daniel Dunbar | 0ac86f0 | 2009-03-18 19:51:01 +0000 | [diff] [blame] | 533 | // sret disables readnone and readonly |
| 534 | FuncAttrs &= ~(llvm::Attribute::ReadOnly | |
| 535 | llvm::Attribute::ReadNone); |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 536 | break; |
| 537 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 538 | case ABIArgInfo::Ignore: |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 539 | case ABIArgInfo::Coerce: |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 540 | break; |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 541 | |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 542 | case ABIArgInfo::Expand: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 543 | assert(0 && "Invalid ABI kind for return argument"); |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 544 | } |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 545 | |
Devang Patel | a2c6912 | 2008-09-26 22:53:57 +0000 | [diff] [blame] | 546 | if (RetAttrs) |
| 547 | PAL.push_back(llvm::AttributeWithIndex::get(0, RetAttrs)); |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 548 | |
| 549 | // FIXME: we need to honour command line settings also... |
| 550 | // FIXME: RegParm should be reduced in case of nested functions and/or global |
| 551 | // register variable. |
| 552 | signed RegParm = 0; |
| 553 | if (TargetDecl) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 554 | if (const RegparmAttr *RegParmAttr |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 555 | = TargetDecl->getAttr<RegparmAttr>()) |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 556 | RegParm = RegParmAttr->getNumParams(); |
| 557 | |
| 558 | unsigned PointerWidth = getContext().Target.getPointerWidth(0); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 559 | for (CGFunctionInfo::const_arg_iterator it = FI.arg_begin(), |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 560 | ie = FI.arg_end(); it != ie; ++it) { |
| 561 | QualType ParamType = it->type; |
| 562 | const ABIArgInfo &AI = it->info; |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 563 | unsigned Attributes = 0; |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 564 | |
Nuno Lopes | 079b495 | 2009-12-07 18:30:06 +0000 | [diff] [blame] | 565 | if (ParamType.isRestrictQualified()) |
| 566 | Attributes |= llvm::Attribute::NoAlias; |
| 567 | |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 568 | switch (AI.getKind()) { |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 569 | case ABIArgInfo::Coerce: |
| 570 | break; |
| 571 | |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 572 | case ABIArgInfo::Indirect: |
Anders Carlsson | 0a8f847 | 2009-09-16 15:53:40 +0000 | [diff] [blame] | 573 | if (AI.getIndirectByVal()) |
| 574 | Attributes |= llvm::Attribute::ByVal; |
| 575 | |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 576 | Attributes |= |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 577 | llvm::Attribute::constructAlignmentFromInt(AI.getIndirectAlign()); |
Daniel Dunbar | 0ac86f0 | 2009-03-18 19:51:01 +0000 | [diff] [blame] | 578 | // byval disables readnone and readonly. |
| 579 | FuncAttrs &= ~(llvm::Attribute::ReadOnly | |
| 580 | llvm::Attribute::ReadNone); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 581 | break; |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 582 | |
| 583 | case ABIArgInfo::Extend: |
| 584 | if (ParamType->isSignedIntegerType()) { |
| 585 | Attributes |= llvm::Attribute::SExt; |
| 586 | } else if (ParamType->isUnsignedIntegerType()) { |
| 587 | Attributes |= llvm::Attribute::ZExt; |
| 588 | } |
| 589 | // FALLS THROUGH |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 590 | case ABIArgInfo::Direct: |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 591 | if (RegParm > 0 && |
| 592 | (ParamType->isIntegerType() || ParamType->isPointerType())) { |
| 593 | RegParm -= |
| 594 | (Context.getTypeSize(ParamType) + PointerWidth - 1) / PointerWidth; |
| 595 | if (RegParm >= 0) |
| 596 | Attributes |= llvm::Attribute::InReg; |
| 597 | } |
| 598 | // FIXME: handle sseregparm someday... |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 599 | break; |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 600 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 601 | case ABIArgInfo::Ignore: |
| 602 | // Skip increment, no matching LLVM parameter. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 603 | continue; |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 604 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 605 | case ABIArgInfo::Expand: { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 606 | std::vector<const llvm::Type*> Tys; |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 607 | // FIXME: This is rather inefficient. Do we ever actually need to do |
| 608 | // anything here? The result should be just reconstructed on the other |
| 609 | // side, so extension should be a non-issue. |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 610 | getTypes().GetExpandedTypes(ParamType, Tys); |
| 611 | Index += Tys.size(); |
| 612 | continue; |
| 613 | } |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 614 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 615 | |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 616 | if (Attributes) |
| 617 | PAL.push_back(llvm::AttributeWithIndex::get(Index, Attributes)); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 618 | ++Index; |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 619 | } |
Devang Patel | a2c6912 | 2008-09-26 22:53:57 +0000 | [diff] [blame] | 620 | if (FuncAttrs) |
| 621 | PAL.push_back(llvm::AttributeWithIndex::get(~0, FuncAttrs)); |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 622 | } |
| 623 | |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 624 | void CodeGenFunction::EmitFunctionProlog(const CGFunctionInfo &FI, |
| 625 | llvm::Function *Fn, |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 626 | const FunctionArgList &Args) { |
John McCall | 0cfeb63 | 2009-07-28 01:00:58 +0000 | [diff] [blame] | 627 | // If this is an implicit-return-zero function, go ahead and |
| 628 | // initialize the return value. TODO: it might be nice to have |
| 629 | // a more general mechanism for this that didn't require synthesized |
| 630 | // return statements. |
Anders Carlsson | 89ed31d | 2009-08-08 23:24:23 +0000 | [diff] [blame] | 631 | if (const FunctionDecl* FD = dyn_cast_or_null<FunctionDecl>(CurFuncDecl)) { |
John McCall | 0cfeb63 | 2009-07-28 01:00:58 +0000 | [diff] [blame] | 632 | if (FD->hasImplicitReturnZero()) { |
| 633 | QualType RetTy = FD->getResultType().getUnqualifiedType(); |
| 634 | const llvm::Type* LLVMTy = CGM.getTypes().ConvertType(RetTy); |
Owen Anderson | c9c88b4 | 2009-07-31 20:28:54 +0000 | [diff] [blame] | 635 | llvm::Constant* Zero = llvm::Constant::getNullValue(LLVMTy); |
John McCall | 0cfeb63 | 2009-07-28 01:00:58 +0000 | [diff] [blame] | 636 | Builder.CreateStore(Zero, ReturnValue); |
| 637 | } |
| 638 | } |
| 639 | |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 640 | // FIXME: We no longer need the types from FunctionArgList; lift up and |
| 641 | // simplify. |
Daniel Dunbar | 5251afa | 2009-02-03 06:02:10 +0000 | [diff] [blame] | 642 | |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 643 | // Emit allocs for param decls. Give the LLVM Argument nodes names. |
| 644 | llvm::Function::arg_iterator AI = Fn->arg_begin(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 645 | |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 646 | // Name the struct return argument. |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 647 | if (CGM.ReturnTypeUsesSret(FI)) { |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 648 | AI->setName("agg.result"); |
| 649 | ++AI; |
| 650 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 651 | |
Daniel Dunbar | 4b5f0a4 | 2009-02-04 21:17:21 +0000 | [diff] [blame] | 652 | assert(FI.arg_size() == Args.size() && |
| 653 | "Mismatch between function signature & arguments."); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 654 | CGFunctionInfo::const_arg_iterator info_it = FI.arg_begin(); |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 655 | for (FunctionArgList::const_iterator i = Args.begin(), e = Args.end(); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 656 | i != e; ++i, ++info_it) { |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 657 | const VarDecl *Arg = i->first; |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 658 | QualType Ty = info_it->type; |
| 659 | const ABIArgInfo &ArgI = info_it->info; |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 660 | |
| 661 | switch (ArgI.getKind()) { |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 662 | case ABIArgInfo::Indirect: { |
| 663 | llvm::Value* V = AI; |
| 664 | if (hasAggregateLLVMType(Ty)) { |
| 665 | // Do nothing, aggregates and complex variables are accessed by |
| 666 | // reference. |
| 667 | } else { |
| 668 | // Load scalar value from indirect argument. |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 669 | V = EmitLoadOfScalar(V, false, Ty); |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 670 | if (!getContext().typesAreCompatible(Ty, Arg->getType())) { |
| 671 | // This must be a promotion, for something like |
| 672 | // "void a(x) short x; {..." |
| 673 | V = EmitScalarConversion(V, Ty, Arg->getType()); |
| 674 | } |
| 675 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 676 | EmitParmDecl(*Arg, V); |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 677 | break; |
| 678 | } |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 679 | |
| 680 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 681 | case ABIArgInfo::Direct: { |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 682 | assert(AI != Fn->arg_end() && "Argument mismatch!"); |
| 683 | llvm::Value* V = AI; |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 684 | if (hasAggregateLLVMType(Ty)) { |
| 685 | // Create a temporary alloca to hold the argument; the rest of |
| 686 | // codegen expects to access aggregates & complex values by |
| 687 | // reference. |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 688 | V = CreateTempAlloca(ConvertTypeForMem(Ty)); |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 689 | Builder.CreateStore(AI, V); |
| 690 | } else { |
| 691 | if (!getContext().typesAreCompatible(Ty, Arg->getType())) { |
| 692 | // This must be a promotion, for something like |
| 693 | // "void a(x) short x; {..." |
| 694 | V = EmitScalarConversion(V, Ty, Arg->getType()); |
| 695 | } |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 696 | } |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 697 | EmitParmDecl(*Arg, V); |
| 698 | break; |
| 699 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 700 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 701 | case ABIArgInfo::Expand: { |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 702 | // If this structure was expanded into multiple arguments then |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 703 | // we need to create a temporary and reconstruct it from the |
| 704 | // arguments. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 705 | llvm::Value *Temp = CreateTempAlloca(ConvertTypeForMem(Ty), |
Daniel Dunbar | 259e9cc | 2009-10-19 01:21:05 +0000 | [diff] [blame] | 706 | Arg->getName() + ".addr"); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 707 | // FIXME: What are the right qualifiers here? |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 708 | llvm::Function::arg_iterator End = |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 709 | ExpandTypeFromArgs(Ty, LValue::MakeAddr(Temp, Qualifiers()), AI); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 710 | EmitParmDecl(*Arg, Temp); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 711 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 712 | // Name the arguments used in expansion and increment AI. |
| 713 | unsigned Index = 0; |
| 714 | for (; AI != End; ++AI, ++Index) |
Daniel Dunbar | 259e9cc | 2009-10-19 01:21:05 +0000 | [diff] [blame] | 715 | AI->setName(Arg->getName() + "." + llvm::Twine(Index)); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 716 | continue; |
| 717 | } |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 718 | |
| 719 | case ABIArgInfo::Ignore: |
Daniel Dunbar | 8b979d9 | 2009-02-10 00:06:49 +0000 | [diff] [blame] | 720 | // Initialize the local variable appropriately. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 721 | if (hasAggregateLLVMType(Ty)) { |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 722 | EmitParmDecl(*Arg, CreateTempAlloca(ConvertTypeForMem(Ty))); |
Daniel Dunbar | 8b979d9 | 2009-02-10 00:06:49 +0000 | [diff] [blame] | 723 | } else { |
| 724 | EmitParmDecl(*Arg, llvm::UndefValue::get(ConvertType(Arg->getType()))); |
| 725 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 726 | |
Daniel Dunbar | 59e5a0e | 2009-02-03 20:00:13 +0000 | [diff] [blame] | 727 | // Skip increment, no matching LLVM parameter. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 728 | continue; |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 729 | |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 730 | case ABIArgInfo::Coerce: { |
| 731 | assert(AI != Fn->arg_end() && "Argument mismatch!"); |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 732 | // FIXME: This is very wasteful; EmitParmDecl is just going to drop the |
| 733 | // result in a new alloca anyway, so we could just store into that |
| 734 | // directly if we broke the abstraction down more. |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 735 | llvm::Value *V = CreateTempAlloca(ConvertTypeForMem(Ty), "coerce"); |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 736 | CreateCoercedStore(AI, V, /*DestIsVolatile=*/false, *this); |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 737 | // Match to what EmitParmDecl is expecting for this type. |
Daniel Dunbar | 8b29a38 | 2009-02-04 07:22:24 +0000 | [diff] [blame] | 738 | if (!CodeGenFunction::hasAggregateLLVMType(Ty)) { |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 739 | V = EmitLoadOfScalar(V, false, Ty); |
Daniel Dunbar | 8b29a38 | 2009-02-04 07:22:24 +0000 | [diff] [blame] | 740 | if (!getContext().typesAreCompatible(Ty, Arg->getType())) { |
| 741 | // This must be a promotion, for something like |
| 742 | // "void a(x) short x; {..." |
| 743 | V = EmitScalarConversion(V, Ty, Arg->getType()); |
| 744 | } |
| 745 | } |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 746 | EmitParmDecl(*Arg, V); |
| 747 | break; |
| 748 | } |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 749 | } |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 750 | |
| 751 | ++AI; |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 752 | } |
| 753 | assert(AI == Fn->arg_end() && "Argument mismatch!"); |
| 754 | } |
| 755 | |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 756 | void CodeGenFunction::EmitFunctionEpilog(const CGFunctionInfo &FI, |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 757 | llvm::Value *ReturnValue) { |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 758 | llvm::Value *RV = 0; |
| 759 | |
| 760 | // Functions with no result always return void. |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 761 | if (ReturnValue) { |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 762 | QualType RetTy = FI.getReturnType(); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 763 | const ABIArgInfo &RetAI = FI.getReturnInfo(); |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 764 | |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 765 | switch (RetAI.getKind()) { |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 766 | case ABIArgInfo::Indirect: |
Daniel Dunbar | 3aea8ca | 2008-12-18 04:52:14 +0000 | [diff] [blame] | 767 | if (RetTy->isAnyComplexType()) { |
Daniel Dunbar | 3aea8ca | 2008-12-18 04:52:14 +0000 | [diff] [blame] | 768 | ComplexPairTy RT = LoadComplexFromAddr(ReturnValue, false); |
| 769 | StoreComplexToAddr(RT, CurFn->arg_begin(), false); |
| 770 | } else if (CodeGenFunction::hasAggregateLLVMType(RetTy)) { |
Eli Friedman | b17daf9 | 2009-12-04 02:43:40 +0000 | [diff] [blame] | 771 | // Do nothing; aggregrates get evaluated directly into the destination. |
Daniel Dunbar | 3aea8ca | 2008-12-18 04:52:14 +0000 | [diff] [blame] | 772 | } else { |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 773 | EmitStoreOfScalar(Builder.CreateLoad(ReturnValue), CurFn->arg_begin(), |
Anders Carlsson | b4aa466 | 2009-05-19 18:50:41 +0000 | [diff] [blame] | 774 | false, RetTy); |
Daniel Dunbar | 3aea8ca | 2008-12-18 04:52:14 +0000 | [diff] [blame] | 775 | } |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 776 | break; |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 777 | |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 778 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 779 | case ABIArgInfo::Direct: |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 780 | // The internal return value temp always will have |
| 781 | // pointer-to-return-type type. |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 782 | RV = Builder.CreateLoad(ReturnValue); |
| 783 | break; |
| 784 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 785 | case ABIArgInfo::Ignore: |
| 786 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 787 | |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 788 | case ABIArgInfo::Coerce: |
Daniel Dunbar | 54d1ccb | 2009-01-27 01:36:03 +0000 | [diff] [blame] | 789 | RV = CreateCoercedLoad(ReturnValue, RetAI.getCoerceToType(), *this); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 790 | break; |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 791 | |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 792 | case ABIArgInfo::Expand: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 793 | assert(0 && "Invalid ABI kind for return argument"); |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 794 | } |
| 795 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 796 | |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 797 | if (RV) { |
| 798 | Builder.CreateRet(RV); |
| 799 | } else { |
| 800 | Builder.CreateRetVoid(); |
| 801 | } |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 802 | } |
| 803 | |
Anders Carlsson | 0139bb9 | 2009-04-08 20:47:54 +0000 | [diff] [blame] | 804 | RValue CodeGenFunction::EmitCallArg(const Expr *E, QualType ArgType) { |
Anders Carlsson | 4029ca7 | 2009-05-20 00:24:07 +0000 | [diff] [blame] | 805 | if (ArgType->isReferenceType()) |
| 806 | return EmitReferenceBindingToExpr(E, ArgType); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 807 | |
Anders Carlsson | 0139bb9 | 2009-04-08 20:47:54 +0000 | [diff] [blame] | 808 | return EmitAnyExprToTemp(E); |
| 809 | } |
| 810 | |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 811 | RValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 812 | llvm::Value *Callee, |
Anders Carlsson | f3c47c9 | 2009-12-24 19:25:24 +0000 | [diff] [blame] | 813 | ReturnValueSlot ReturnValue, |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 814 | const CallArgList &CallArgs, |
| 815 | const Decl *TargetDecl) { |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 816 | // 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] | 817 | llvm::SmallVector<llvm::Value*, 16> Args; |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 818 | |
| 819 | // Handle struct-return functions by passing a pointer to the |
| 820 | // location that we would like to return into. |
Daniel Dunbar | bb36d33 | 2009-02-02 21:43:58 +0000 | [diff] [blame] | 821 | QualType RetTy = CallInfo.getReturnType(); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 822 | const ABIArgInfo &RetAI = CallInfo.getReturnInfo(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 823 | |
| 824 | |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 825 | // If the call returns a temporary with struct return, create a temporary |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 826 | // alloca to hold the result, unless one is given to us. |
| 827 | if (CGM.ReturnTypeUsesSret(CallInfo)) { |
| 828 | llvm::Value *Value = ReturnValue.getValue(); |
| 829 | if (!Value) |
| 830 | Value = CreateTempAlloca(ConvertTypeForMem(RetTy)); |
| 831 | Args.push_back(Value); |
| 832 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 833 | |
Daniel Dunbar | 4b5f0a4 | 2009-02-04 21:17:21 +0000 | [diff] [blame] | 834 | assert(CallInfo.arg_size() == CallArgs.size() && |
| 835 | "Mismatch between function signature & arguments."); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 836 | CGFunctionInfo::const_arg_iterator info_it = CallInfo.arg_begin(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 837 | for (CallArgList::const_iterator I = CallArgs.begin(), E = CallArgs.end(); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 838 | I != E; ++I, ++info_it) { |
| 839 | const ABIArgInfo &ArgInfo = info_it->info; |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 840 | RValue RV = I->first; |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 841 | |
| 842 | switch (ArgInfo.getKind()) { |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 843 | case ABIArgInfo::Indirect: |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 844 | if (RV.isScalar() || RV.isComplex()) { |
| 845 | // Make a temporary alloca to pass the argument. |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 846 | Args.push_back(CreateTempAlloca(ConvertTypeForMem(I->second))); |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 847 | if (RV.isScalar()) |
Anders Carlsson | b4aa466 | 2009-05-19 18:50:41 +0000 | [diff] [blame] | 848 | EmitStoreOfScalar(RV.getScalarVal(), Args.back(), false, I->second); |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 849 | else |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 850 | StoreComplexToAddr(RV.getComplexVal(), Args.back(), false); |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 851 | } else { |
| 852 | Args.push_back(RV.getAggregateAddr()); |
| 853 | } |
| 854 | break; |
| 855 | |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 856 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 857 | case ABIArgInfo::Direct: |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 858 | if (RV.isScalar()) { |
| 859 | Args.push_back(RV.getScalarVal()); |
| 860 | } else if (RV.isComplex()) { |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 861 | llvm::Value *Tmp = llvm::UndefValue::get(ConvertType(I->second)); |
| 862 | Tmp = Builder.CreateInsertValue(Tmp, RV.getComplexVal().first, 0); |
| 863 | Tmp = Builder.CreateInsertValue(Tmp, RV.getComplexVal().second, 1); |
| 864 | Args.push_back(Tmp); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 865 | } else { |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 866 | Args.push_back(Builder.CreateLoad(RV.getAggregateAddr())); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 867 | } |
| 868 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 869 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 870 | case ABIArgInfo::Ignore: |
| 871 | break; |
| 872 | |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 873 | case ABIArgInfo::Coerce: { |
| 874 | // FIXME: Avoid the conversion through memory if possible. |
| 875 | llvm::Value *SrcPtr; |
| 876 | if (RV.isScalar()) { |
Daniel Dunbar | 5a1be6e | 2009-02-03 23:04:57 +0000 | [diff] [blame] | 877 | SrcPtr = CreateTempAlloca(ConvertTypeForMem(I->second), "coerce"); |
Anders Carlsson | b4aa466 | 2009-05-19 18:50:41 +0000 | [diff] [blame] | 878 | EmitStoreOfScalar(RV.getScalarVal(), SrcPtr, false, I->second); |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 879 | } else if (RV.isComplex()) { |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 880 | SrcPtr = CreateTempAlloca(ConvertTypeForMem(I->second), "coerce"); |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 881 | StoreComplexToAddr(RV.getComplexVal(), SrcPtr, false); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 882 | } else |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 883 | SrcPtr = RV.getAggregateAddr(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 884 | Args.push_back(CreateCoercedLoad(SrcPtr, ArgInfo.getCoerceToType(), |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 885 | *this)); |
| 886 | break; |
| 887 | } |
| 888 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 889 | case ABIArgInfo::Expand: |
| 890 | ExpandTypeToArgs(I->second, RV, Args); |
| 891 | break; |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 892 | } |
| 893 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 894 | |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 895 | // If the callee is a bitcast of a function to a varargs pointer to function |
| 896 | // type, check to see if we can remove the bitcast. This handles some cases |
| 897 | // with unprototyped functions. |
| 898 | if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Callee)) |
| 899 | if (llvm::Function *CalleeF = dyn_cast<llvm::Function>(CE->getOperand(0))) { |
| 900 | const llvm::PointerType *CurPT=cast<llvm::PointerType>(Callee->getType()); |
| 901 | const llvm::FunctionType *CurFT = |
| 902 | cast<llvm::FunctionType>(CurPT->getElementType()); |
| 903 | const llvm::FunctionType *ActualFT = CalleeF->getFunctionType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 904 | |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 905 | if (CE->getOpcode() == llvm::Instruction::BitCast && |
| 906 | ActualFT->getReturnType() == CurFT->getReturnType() && |
Chris Lattner | d6bebbf | 2009-06-23 01:38:41 +0000 | [diff] [blame] | 907 | ActualFT->getNumParams() == CurFT->getNumParams() && |
| 908 | ActualFT->getNumParams() == Args.size()) { |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 909 | bool ArgsMatch = true; |
| 910 | for (unsigned i = 0, e = ActualFT->getNumParams(); i != e; ++i) |
| 911 | if (ActualFT->getParamType(i) != CurFT->getParamType(i)) { |
| 912 | ArgsMatch = false; |
| 913 | break; |
| 914 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 915 | |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 916 | // Strip the cast if we can get away with it. This is a nice cleanup, |
| 917 | // but also allows us to inline the function at -O0 if it is marked |
| 918 | // always_inline. |
| 919 | if (ArgsMatch) |
| 920 | Callee = CalleeF; |
| 921 | } |
| 922 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 923 | |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 924 | |
Daniel Dunbar | 9834ffb | 2009-02-23 17:26:39 +0000 | [diff] [blame] | 925 | llvm::BasicBlock *InvokeDest = getInvokeDest(); |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 926 | unsigned CallingConv; |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 927 | CodeGen::AttributeListType AttributeList; |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 928 | CGM.ConstructAttributeList(CallInfo, TargetDecl, AttributeList, CallingConv); |
Daniel Dunbar | 9834ffb | 2009-02-23 17:26:39 +0000 | [diff] [blame] | 929 | llvm::AttrListPtr Attrs = llvm::AttrListPtr::get(AttributeList.begin(), |
| 930 | AttributeList.end()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 931 | |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 932 | llvm::CallSite CS; |
| 933 | if (!InvokeDest || (Attrs.getFnAttributes() & llvm::Attribute::NoUnwind)) { |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 934 | CS = Builder.CreateCall(Callee, Args.data(), Args.data()+Args.size()); |
Daniel Dunbar | 9834ffb | 2009-02-23 17:26:39 +0000 | [diff] [blame] | 935 | } else { |
| 936 | llvm::BasicBlock *Cont = createBasicBlock("invoke.cont"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 937 | CS = Builder.CreateInvoke(Callee, Cont, InvokeDest, |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 938 | Args.data(), Args.data()+Args.size()); |
Daniel Dunbar | 9834ffb | 2009-02-23 17:26:39 +0000 | [diff] [blame] | 939 | EmitBlock(Cont); |
Daniel Dunbar | f4fe0f0 | 2009-02-20 18:54:31 +0000 | [diff] [blame] | 940 | } |
| 941 | |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 942 | CS.setAttributes(Attrs); |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 943 | CS.setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 944 | |
| 945 | // If the call doesn't return, finish the basic block and clear the |
| 946 | // insertion point; this allows the rest of IRgen to discard |
| 947 | // unreachable code. |
| 948 | if (CS.doesNotReturn()) { |
| 949 | Builder.CreateUnreachable(); |
| 950 | Builder.ClearInsertionPoint(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 951 | |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 952 | // FIXME: For now, emit a dummy basic block because expr emitters in |
| 953 | // generally are not ready to handle emitting expressions at unreachable |
| 954 | // points. |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 955 | EnsureInsertPoint(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 956 | |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 957 | // Return a reasonable RValue. |
| 958 | return GetUndefRValue(RetTy); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 959 | } |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 960 | |
| 961 | llvm::Instruction *CI = CS.getInstruction(); |
Benjamin Kramer | ffbb15e | 2009-10-05 13:47:21 +0000 | [diff] [blame] | 962 | if (Builder.isNamePreserving() && !CI->getType()->isVoidTy()) |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 963 | CI->setName("call"); |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 964 | |
| 965 | switch (RetAI.getKind()) { |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 966 | case ABIArgInfo::Indirect: |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 967 | if (RetTy->isAnyComplexType()) |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 968 | return RValue::getComplex(LoadComplexFromAddr(Args[0], false)); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 969 | if (CodeGenFunction::hasAggregateLLVMType(RetTy)) |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 970 | return RValue::getAggregate(Args[0]); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 971 | return RValue::get(EmitLoadOfScalar(Args[0], false, RetTy)); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 972 | |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 973 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 974 | case ABIArgInfo::Direct: |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 975 | if (RetTy->isAnyComplexType()) { |
| 976 | llvm::Value *Real = Builder.CreateExtractValue(CI, 0); |
| 977 | llvm::Value *Imag = Builder.CreateExtractValue(CI, 1); |
| 978 | return RValue::getComplex(std::make_pair(Real, Imag)); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 979 | } |
| 980 | if (CodeGenFunction::hasAggregateLLVMType(RetTy)) { |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 981 | llvm::Value *DestPtr = ReturnValue.getValue(); |
| 982 | bool DestIsVolatile = ReturnValue.isVolatile(); |
| 983 | |
| 984 | if (!DestPtr) { |
| 985 | DestPtr = CreateTempAlloca(ConvertTypeForMem(RetTy), "agg.tmp"); |
| 986 | DestIsVolatile = false; |
| 987 | } |
| 988 | Builder.CreateStore(CI, DestPtr, DestIsVolatile); |
| 989 | return RValue::getAggregate(DestPtr); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 990 | } |
| 991 | return RValue::get(CI); |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 992 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 993 | case ABIArgInfo::Ignore: |
Daniel Dunbar | 0bcc521 | 2009-02-03 06:30:17 +0000 | [diff] [blame] | 994 | // If we are ignoring an argument that had a result, make sure to |
| 995 | // construct the appropriate return value for our caller. |
Daniel Dunbar | 13e8173 | 2009-02-05 07:09:07 +0000 | [diff] [blame] | 996 | return GetUndefRValue(RetTy); |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 997 | |
Daniel Dunbar | 639ffe4 | 2008-09-10 07:04:09 +0000 | [diff] [blame] | 998 | case ABIArgInfo::Coerce: { |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 999 | llvm::Value *DestPtr = ReturnValue.getValue(); |
| 1000 | bool DestIsVolatile = ReturnValue.isVolatile(); |
| 1001 | |
| 1002 | if (!DestPtr) { |
| 1003 | DestPtr = CreateTempAlloca(ConvertTypeForMem(RetTy), "coerce"); |
| 1004 | DestIsVolatile = false; |
| 1005 | } |
| 1006 | |
| 1007 | CreateCoercedStore(CI, DestPtr, DestIsVolatile, *this); |
Anders Carlsson | ad3d691 | 2008-11-25 22:21:48 +0000 | [diff] [blame] | 1008 | if (RetTy->isAnyComplexType()) |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 1009 | return RValue::getComplex(LoadComplexFromAddr(DestPtr, false)); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 1010 | if (CodeGenFunction::hasAggregateLLVMType(RetTy)) |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 1011 | return RValue::getAggregate(DestPtr); |
| 1012 | return RValue::get(EmitLoadOfScalar(DestPtr, false, RetTy)); |
Daniel Dunbar | 639ffe4 | 2008-09-10 07:04:09 +0000 | [diff] [blame] | 1013 | } |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 1014 | |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 1015 | case ABIArgInfo::Expand: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1016 | assert(0 && "Invalid ABI kind for return argument"); |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 1017 | } |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 1018 | |
| 1019 | assert(0 && "Unhandled ABIArgInfo::Kind"); |
| 1020 | return RValue::get(0); |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 1021 | } |
Daniel Dunbar | b4094ea | 2009-02-10 20:44:09 +0000 | [diff] [blame] | 1022 | |
| 1023 | /* VarArg handling */ |
| 1024 | |
| 1025 | llvm::Value *CodeGenFunction::EmitVAArg(llvm::Value *VAListAddr, QualType Ty) { |
| 1026 | return CGM.getTypes().getABIInfo().EmitVAArg(VAListAddr, Ty, *this); |
| 1027 | } |