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 | |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 36 | static unsigned ClangCallConvToLLVMCallConv(CallingConv CC) { |
| 37 | switch (CC) { |
| 38 | default: return llvm::CallingConv::C; |
| 39 | case CC_X86StdCall: return llvm::CallingConv::X86_StdCall; |
| 40 | case CC_X86FastCall: return llvm::CallingConv::X86_FastCall; |
| 41 | } |
| 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 FunctionNoProtoType *FTNP) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 46 | return getFunctionInfo(FTNP->getResultType(), |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 47 | llvm::SmallVector<QualType, 16>(), |
| 48 | FTNP->getCallConv(), FTNP->getNoReturnAttr()); |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 49 | } |
| 50 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 51 | const |
Douglas Gregor | 72564e7 | 2009-02-26 23:50:07 +0000 | [diff] [blame] | 52 | CGFunctionInfo &CodeGenTypes::getFunctionInfo(const FunctionProtoType *FTP) { |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 53 | llvm::SmallVector<QualType, 16> ArgTys; |
| 54 | // FIXME: Kill copy. |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 55 | for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i) |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 56 | ArgTys.push_back(FTP->getArgType(i)); |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 57 | return getFunctionInfo(FTP->getResultType(), ArgTys, |
| 58 | FTP->getCallConv(), FTP->getNoReturnAttr()); |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 59 | } |
| 60 | |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 61 | static CallingConv getCallingConventionForDecl(const Decl *D) { |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 62 | // Set the appropriate calling convention for the Function. |
| 63 | if (D->hasAttr<StdCallAttr>()) |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 64 | return CC_X86StdCall; |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 65 | |
| 66 | if (D->hasAttr<FastCallAttr>()) |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 67 | return CC_X86FastCall; |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 68 | |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 69 | return CC_C; |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 70 | } |
| 71 | |
Anders Carlsson | 375c31c | 2009-10-03 19:43:08 +0000 | [diff] [blame] | 72 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const CXXRecordDecl *RD, |
| 73 | const FunctionProtoType *FTP) { |
| 74 | llvm::SmallVector<QualType, 16> ArgTys; |
| 75 | |
| 76 | // Add the 'this' pointer. |
| 77 | ArgTys.push_back(Context.getPointerType(Context.getTagDeclType(RD))); |
| 78 | |
| 79 | for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i) |
| 80 | ArgTys.push_back(FTP->getArgType(i)); |
| 81 | |
| 82 | // FIXME: Set calling convention correctly, it needs to be associated with the |
| 83 | // type somehow. |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 84 | return getFunctionInfo(FTP->getResultType(), ArgTys, |
| 85 | FTP->getCallConv(), FTP->getNoReturnAttr()); |
Anders Carlsson | 375c31c | 2009-10-03 19:43:08 +0000 | [diff] [blame] | 86 | } |
| 87 | |
Anders Carlsson | f6f8ae5 | 2009-04-03 22:48:58 +0000 | [diff] [blame] | 88 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const CXXMethodDecl *MD) { |
| 89 | llvm::SmallVector<QualType, 16> ArgTys; |
Chris Lattner | 3eb67ca | 2009-05-12 20:27:19 +0000 | [diff] [blame] | 90 | // Add the 'this' pointer unless this is a static method. |
| 91 | if (MD->isInstance()) |
| 92 | ArgTys.push_back(MD->getThisType(Context)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 93 | |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 94 | const FunctionProtoType *FTP = MD->getType()->getAs<FunctionProtoType>(); |
Anders Carlsson | f6f8ae5 | 2009-04-03 22:48:58 +0000 | [diff] [blame] | 95 | for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i) |
| 96 | ArgTys.push_back(FTP->getArgType(i)); |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 97 | return getFunctionInfo(FTP->getResultType(), ArgTys, FTP->getCallConv(), |
| 98 | FTP->getNoReturnAttr()); |
Anders Carlsson | f6f8ae5 | 2009-04-03 22:48:58 +0000 | [diff] [blame] | 99 | } |
| 100 | |
Anders Carlsson | f6c56e2 | 2009-11-25 03:15:49 +0000 | [diff] [blame] | 101 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const CXXConstructorDecl *D, |
| 102 | CXXCtorType Type) { |
| 103 | llvm::SmallVector<QualType, 16> ArgTys; |
| 104 | |
| 105 | // Add the 'this' pointer. |
| 106 | ArgTys.push_back(D->getThisType(Context)); |
| 107 | |
| 108 | // Check if we need to add a VTT parameter (which has type void **). |
| 109 | if (Type == Ctor_Base && D->getParent()->getNumVBases() != 0) |
| 110 | ArgTys.push_back(Context.getPointerType(Context.VoidPtrTy)); |
| 111 | |
| 112 | const FunctionProtoType *FTP = D->getType()->getAs<FunctionProtoType>(); |
| 113 | for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i) |
| 114 | ArgTys.push_back(FTP->getArgType(i)); |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 115 | return getFunctionInfo(FTP->getResultType(), ArgTys, FTP->getCallConv(), |
| 116 | FTP->getNoReturnAttr()); |
Anders Carlsson | f6c56e2 | 2009-11-25 03:15:49 +0000 | [diff] [blame] | 117 | } |
| 118 | |
| 119 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const CXXDestructorDecl *D, |
| 120 | CXXDtorType Type) { |
| 121 | llvm::SmallVector<QualType, 16> ArgTys; |
| 122 | |
| 123 | // Add the 'this' pointer. |
| 124 | ArgTys.push_back(D->getThisType(Context)); |
| 125 | |
| 126 | // Check if we need to add a VTT parameter (which has type void **). |
| 127 | if (Type == Dtor_Base && D->getParent()->getNumVBases() != 0) |
| 128 | ArgTys.push_back(Context.getPointerType(Context.VoidPtrTy)); |
| 129 | |
| 130 | const FunctionProtoType *FTP = D->getType()->getAs<FunctionProtoType>(); |
| 131 | for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i) |
| 132 | ArgTys.push_back(FTP->getArgType(i)); |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 133 | return getFunctionInfo(FTP->getResultType(), ArgTys, FTP->getCallConv(), |
| 134 | FTP->getNoReturnAttr()); |
Anders Carlsson | f6c56e2 | 2009-11-25 03:15:49 +0000 | [diff] [blame] | 135 | } |
| 136 | |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 137 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const FunctionDecl *FD) { |
Chris Lattner | 3eb67ca | 2009-05-12 20:27:19 +0000 | [diff] [blame] | 138 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) |
Anders Carlsson | f6f8ae5 | 2009-04-03 22:48:58 +0000 | [diff] [blame] | 139 | if (MD->isInstance()) |
| 140 | return getFunctionInfo(MD); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 141 | |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 142 | const FunctionType *FTy = FD->getType()->getAs<FunctionType>(); |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 143 | if (const FunctionNoProtoType *FNTP = dyn_cast<FunctionNoProtoType>(FTy)) |
| 144 | return getFunctionInfo(FNTP->getResultType(), |
| 145 | llvm::SmallVector<QualType, 16>(), |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 146 | FNTP->getCallConv(), FNTP->getNoReturnAttr()); |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 147 | |
| 148 | const FunctionProtoType *FPT = cast<FunctionProtoType>(FTy); |
| 149 | llvm::SmallVector<QualType, 16> ArgTys; |
| 150 | // FIXME: Kill copy. |
| 151 | for (unsigned i = 0, e = FPT->getNumArgs(); i != e; ++i) |
| 152 | ArgTys.push_back(FPT->getArgType(i)); |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 153 | return getFunctionInfo(FPT->getResultType(), ArgTys, |
| 154 | FPT->getCallConv(), FPT->getNoReturnAttr()); |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 155 | } |
| 156 | |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 157 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(const ObjCMethodDecl *MD) { |
| 158 | llvm::SmallVector<QualType, 16> ArgTys; |
| 159 | ArgTys.push_back(MD->getSelfDecl()->getType()); |
| 160 | ArgTys.push_back(Context.getObjCSelType()); |
| 161 | // FIXME: Kill copy? |
Chris Lattner | 2073216 | 2009-02-20 06:23:21 +0000 | [diff] [blame] | 162 | for (ObjCMethodDecl::param_iterator i = MD->param_begin(), |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 163 | e = MD->param_end(); i != e; ++i) |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 164 | ArgTys.push_back((*i)->getType()); |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 165 | return getFunctionInfo(MD->getResultType(), ArgTys, |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 166 | getCallingConventionForDecl(MD), |
| 167 | /*NoReturn*/ false); |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 168 | } |
| 169 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 170 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(QualType ResTy, |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 171 | const CallArgList &Args, |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 172 | CallingConv CC, |
| 173 | bool NoReturn) { |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 174 | // FIXME: Kill copy. |
| 175 | llvm::SmallVector<QualType, 16> ArgTys; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 176 | for (CallArgList::const_iterator i = Args.begin(), e = Args.end(); |
Daniel Dunbar | 725ad31 | 2009-01-31 02:19:00 +0000 | [diff] [blame] | 177 | i != e; ++i) |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 178 | ArgTys.push_back(i->second); |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 179 | return getFunctionInfo(ResTy, ArgTys, CC, NoReturn); |
Daniel Dunbar | 725ad31 | 2009-01-31 02:19:00 +0000 | [diff] [blame] | 180 | } |
| 181 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 182 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(QualType ResTy, |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 183 | const FunctionArgList &Args, |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 184 | CallingConv CC, |
| 185 | bool NoReturn) { |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 186 | // FIXME: Kill copy. |
| 187 | llvm::SmallVector<QualType, 16> ArgTys; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 188 | for (FunctionArgList::const_iterator i = Args.begin(), e = Args.end(); |
Daniel Dunbar | bb36d33 | 2009-02-02 21:43:58 +0000 | [diff] [blame] | 189 | i != e; ++i) |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 190 | ArgTys.push_back(i->second); |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 191 | return getFunctionInfo(ResTy, ArgTys, CC, NoReturn); |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | const CGFunctionInfo &CodeGenTypes::getFunctionInfo(QualType ResTy, |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 195 | const llvm::SmallVector<QualType, 16> &ArgTys, |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 196 | CallingConv CallConv, |
| 197 | bool NoReturn) { |
| 198 | unsigned CC = ClangCallConvToLLVMCallConv(CallConv); |
| 199 | |
Daniel Dunbar | 40a6be6 | 2009-02-03 00:07:12 +0000 | [diff] [blame] | 200 | // Lookup or create unique function info. |
| 201 | llvm::FoldingSetNodeID ID; |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 202 | CGFunctionInfo::Profile(ID, CC, NoReturn, ResTy, |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 203 | ArgTys.begin(), ArgTys.end()); |
Daniel Dunbar | 40a6be6 | 2009-02-03 00:07:12 +0000 | [diff] [blame] | 204 | |
| 205 | void *InsertPos = 0; |
| 206 | CGFunctionInfo *FI = FunctionInfos.FindNodeOrInsertPos(ID, InsertPos); |
| 207 | if (FI) |
| 208 | return *FI; |
| 209 | |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 210 | // Construct the function info. |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 211 | FI = new CGFunctionInfo(CC, NoReturn, ResTy, ArgTys); |
Daniel Dunbar | 35e67d4 | 2009-02-05 00:00:23 +0000 | [diff] [blame] | 212 | FunctionInfos.InsertNode(FI, InsertPos); |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 213 | |
| 214 | // Compute ABI information. |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 215 | getABIInfo().computeInfo(*FI, getContext(), TheModule.getContext()); |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 216 | |
Daniel Dunbar | 40a6be6 | 2009-02-03 00:07:12 +0000 | [diff] [blame] | 217 | return *FI; |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 218 | } |
| 219 | |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 220 | CGFunctionInfo::CGFunctionInfo(unsigned _CallingConvention, |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 221 | bool _NoReturn, |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 222 | QualType ResTy, |
| 223 | const llvm::SmallVector<QualType, 16> &ArgTys) |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 224 | : CallingConvention(_CallingConvention), |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 225 | EffectiveCallingConvention(_CallingConvention), |
| 226 | NoReturn(_NoReturn) |
Daniel Dunbar | bac7c25 | 2009-09-11 22:24:53 +0000 | [diff] [blame] | 227 | { |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 228 | NumArgs = ArgTys.size(); |
| 229 | Args = new ArgInfo[1 + NumArgs]; |
| 230 | Args[0].type = ResTy; |
| 231 | for (unsigned i = 0; i < NumArgs; ++i) |
| 232 | Args[1 + i].type = ArgTys[i]; |
| 233 | } |
| 234 | |
| 235 | /***/ |
| 236 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 237 | void CodeGenTypes::GetExpandedTypes(QualType Ty, |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 238 | std::vector<const llvm::Type*> &ArgTys) { |
| 239 | const RecordType *RT = Ty->getAsStructureType(); |
| 240 | assert(RT && "Can only expand structure types."); |
| 241 | const RecordDecl *RD = RT->getDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 242 | assert(!RD->hasFlexibleArrayMember() && |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 243 | "Cannot expand structure with flexible array."); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 244 | |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 245 | for (RecordDecl::field_iterator i = RD->field_begin(), e = RD->field_end(); |
| 246 | i != e; ++i) { |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 247 | const FieldDecl *FD = *i; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 248 | assert(!FD->isBitField() && |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 249 | "Cannot expand structure with bit-field members."); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 250 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 251 | QualType FT = FD->getType(); |
| 252 | if (CodeGenFunction::hasAggregateLLVMType(FT)) { |
| 253 | GetExpandedTypes(FT, ArgTys); |
| 254 | } else { |
| 255 | ArgTys.push_back(ConvertType(FT)); |
| 256 | } |
| 257 | } |
| 258 | } |
| 259 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 260 | llvm::Function::arg_iterator |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 261 | CodeGenFunction::ExpandTypeFromArgs(QualType Ty, LValue LV, |
| 262 | llvm::Function::arg_iterator AI) { |
| 263 | const RecordType *RT = Ty->getAsStructureType(); |
| 264 | assert(RT && "Can only expand structure types."); |
| 265 | |
| 266 | RecordDecl *RD = RT->getDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 267 | assert(LV.isSimple() && |
| 268 | "Unexpected non-simple lvalue during struct expansion."); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 269 | llvm::Value *Addr = LV.getAddress(); |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 270 | for (RecordDecl::field_iterator i = RD->field_begin(), e = RD->field_end(); |
| 271 | i != e; ++i) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 272 | FieldDecl *FD = *i; |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 273 | QualType FT = FD->getType(); |
| 274 | |
| 275 | // FIXME: What are the right qualifiers here? |
Anders Carlsson | e6d2a53 | 2010-01-29 05:05:36 +0000 | [diff] [blame] | 276 | LValue LV = EmitLValueForField(Addr, FD, 0); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 277 | if (CodeGenFunction::hasAggregateLLVMType(FT)) { |
| 278 | AI = ExpandTypeFromArgs(FT, LV, AI); |
| 279 | } else { |
| 280 | EmitStoreThroughLValue(RValue::get(AI), LV, FT); |
| 281 | ++AI; |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | return AI; |
| 286 | } |
| 287 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 288 | void |
| 289 | CodeGenFunction::ExpandTypeToArgs(QualType Ty, RValue RV, |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 290 | llvm::SmallVector<llvm::Value*, 16> &Args) { |
| 291 | const RecordType *RT = Ty->getAsStructureType(); |
| 292 | assert(RT && "Can only expand structure types."); |
| 293 | |
| 294 | RecordDecl *RD = RT->getDecl(); |
| 295 | assert(RV.isAggregate() && "Unexpected rvalue during struct expansion"); |
| 296 | llvm::Value *Addr = RV.getAggregateAddr(); |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 297 | for (RecordDecl::field_iterator i = RD->field_begin(), e = RD->field_end(); |
| 298 | i != e; ++i) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 299 | FieldDecl *FD = *i; |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 300 | QualType FT = FD->getType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 301 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 302 | // FIXME: What are the right qualifiers here? |
Anders Carlsson | e6d2a53 | 2010-01-29 05:05:36 +0000 | [diff] [blame] | 303 | LValue LV = EmitLValueForField(Addr, FD, 0); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 304 | if (CodeGenFunction::hasAggregateLLVMType(FT)) { |
| 305 | ExpandTypeToArgs(FT, RValue::getAggregate(LV.getAddress()), Args); |
| 306 | } else { |
| 307 | RValue RV = EmitLoadOfLValue(LV, FT); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 308 | assert(RV.isScalar() && |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 309 | "Unexpected non-scalar rvalue during struct expansion."); |
| 310 | Args.push_back(RV.getScalarVal()); |
| 311 | } |
| 312 | } |
| 313 | } |
| 314 | |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 315 | /// CreateCoercedLoad - Create a load from \arg SrcPtr interpreted as |
| 316 | /// a pointer to an object of type \arg Ty. |
| 317 | /// |
| 318 | /// This safely handles the case when the src type is smaller than the |
| 319 | /// destination type; in this situation the values of bits which not |
| 320 | /// present in the src are undefined. |
| 321 | static llvm::Value *CreateCoercedLoad(llvm::Value *SrcPtr, |
| 322 | const llvm::Type *Ty, |
| 323 | CodeGenFunction &CGF) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 324 | const llvm::Type *SrcTy = |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 325 | cast<llvm::PointerType>(SrcPtr->getType())->getElementType(); |
Duncan Sands | 9408c45 | 2009-05-09 07:08:47 +0000 | [diff] [blame] | 326 | uint64_t SrcSize = CGF.CGM.getTargetData().getTypeAllocSize(SrcTy); |
| 327 | uint64_t DstSize = CGF.CGM.getTargetData().getTypeAllocSize(Ty); |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 328 | |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 329 | // If load is legal, just bitcast the src pointer. |
Daniel Dunbar | 7ef455b | 2009-05-13 18:54:26 +0000 | [diff] [blame] | 330 | if (SrcSize >= DstSize) { |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 331 | // Generally SrcSize is never greater than DstSize, since this means we are |
| 332 | // losing bits. However, this can happen in cases where the structure has |
| 333 | // additional padding, for example due to a user specified alignment. |
Daniel Dunbar | 7ef455b | 2009-05-13 18:54:26 +0000 | [diff] [blame] | 334 | // |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 335 | // FIXME: Assert that we aren't truncating non-padding bits when have access |
| 336 | // to that information. |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 337 | llvm::Value *Casted = |
| 338 | CGF.Builder.CreateBitCast(SrcPtr, llvm::PointerType::getUnqual(Ty)); |
Daniel Dunbar | 386621f | 2009-02-07 02:46:03 +0000 | [diff] [blame] | 339 | llvm::LoadInst *Load = CGF.Builder.CreateLoad(Casted); |
| 340 | // FIXME: Use better alignment / avoid requiring aligned load. |
| 341 | Load->setAlignment(1); |
| 342 | return Load; |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 343 | } else { |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 344 | // Otherwise do coercion through memory. This is stupid, but |
| 345 | // simple. |
| 346 | llvm::Value *Tmp = CGF.CreateTempAlloca(Ty); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 347 | llvm::Value *Casted = |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 348 | CGF.Builder.CreateBitCast(Tmp, llvm::PointerType::getUnqual(SrcTy)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 349 | llvm::StoreInst *Store = |
Daniel Dunbar | 386621f | 2009-02-07 02:46:03 +0000 | [diff] [blame] | 350 | CGF.Builder.CreateStore(CGF.Builder.CreateLoad(SrcPtr), Casted); |
| 351 | // FIXME: Use better alignment / avoid requiring aligned store. |
| 352 | Store->setAlignment(1); |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 353 | return CGF.Builder.CreateLoad(Tmp); |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | /// CreateCoercedStore - Create a store to \arg DstPtr from \arg Src, |
| 358 | /// where the source and destination may have different types. |
| 359 | /// |
| 360 | /// This safely handles the case when the src type is larger than the |
| 361 | /// destination type; the upper bits of the src will be lost. |
| 362 | static void CreateCoercedStore(llvm::Value *Src, |
| 363 | llvm::Value *DstPtr, |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 364 | bool DstIsVolatile, |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 365 | CodeGenFunction &CGF) { |
| 366 | const llvm::Type *SrcTy = Src->getType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 367 | const llvm::Type *DstTy = |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 368 | cast<llvm::PointerType>(DstPtr->getType())->getElementType(); |
| 369 | |
Duncan Sands | 9408c45 | 2009-05-09 07:08:47 +0000 | [diff] [blame] | 370 | uint64_t SrcSize = CGF.CGM.getTargetData().getTypeAllocSize(SrcTy); |
| 371 | uint64_t DstSize = CGF.CGM.getTargetData().getTypeAllocSize(DstTy); |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 372 | |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 373 | // If store is legal, just bitcast the src pointer. |
Daniel Dunbar | fdf4986 | 2009-06-05 07:58:54 +0000 | [diff] [blame] | 374 | if (SrcSize <= DstSize) { |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 375 | llvm::Value *Casted = |
| 376 | CGF.Builder.CreateBitCast(DstPtr, llvm::PointerType::getUnqual(SrcTy)); |
Daniel Dunbar | 386621f | 2009-02-07 02:46:03 +0000 | [diff] [blame] | 377 | // FIXME: Use better alignment / avoid requiring aligned store. |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 378 | CGF.Builder.CreateStore(Src, Casted, DstIsVolatile)->setAlignment(1); |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 379 | } else { |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 380 | // Otherwise do coercion through memory. This is stupid, but |
| 381 | // simple. |
Daniel Dunbar | fdf4986 | 2009-06-05 07:58:54 +0000 | [diff] [blame] | 382 | |
| 383 | // Generally SrcSize is never greater than DstSize, since this means we are |
| 384 | // losing bits. However, this can happen in cases where the structure has |
| 385 | // additional padding, for example due to a user specified alignment. |
| 386 | // |
| 387 | // FIXME: Assert that we aren't truncating non-padding bits when have access |
| 388 | // to that information. |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 389 | llvm::Value *Tmp = CGF.CreateTempAlloca(SrcTy); |
| 390 | CGF.Builder.CreateStore(Src, Tmp); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 391 | llvm::Value *Casted = |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 392 | CGF.Builder.CreateBitCast(Tmp, llvm::PointerType::getUnqual(DstTy)); |
Daniel Dunbar | 386621f | 2009-02-07 02:46:03 +0000 | [diff] [blame] | 393 | llvm::LoadInst *Load = CGF.Builder.CreateLoad(Casted); |
| 394 | // FIXME: Use better alignment / avoid requiring aligned load. |
| 395 | Load->setAlignment(1); |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 396 | CGF.Builder.CreateStore(Load, DstPtr, DstIsVolatile); |
Daniel Dunbar | 275e10d | 2009-02-02 19:06:38 +0000 | [diff] [blame] | 397 | } |
| 398 | } |
| 399 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 400 | /***/ |
| 401 | |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 402 | bool CodeGenModule::ReturnTypeUsesSret(const CGFunctionInfo &FI) { |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 403 | return FI.getReturnInfo().isIndirect(); |
Daniel Dunbar | bb36d33 | 2009-02-02 21:43:58 +0000 | [diff] [blame] | 404 | } |
| 405 | |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 406 | const llvm::FunctionType * |
Daniel Dunbar | bb36d33 | 2009-02-02 21:43:58 +0000 | [diff] [blame] | 407 | CodeGenTypes::GetFunctionType(const CGFunctionInfo &FI, bool IsVariadic) { |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 408 | std::vector<const llvm::Type*> ArgTys; |
| 409 | |
| 410 | const llvm::Type *ResultType = 0; |
| 411 | |
Daniel Dunbar | a0a99e0 | 2009-02-02 23:43:58 +0000 | [diff] [blame] | 412 | QualType RetTy = FI.getReturnType(); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 413 | const ABIArgInfo &RetAI = FI.getReturnInfo(); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 414 | switch (RetAI.getKind()) { |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 415 | case ABIArgInfo::Expand: |
| 416 | assert(0 && "Invalid ABI kind for return argument"); |
| 417 | |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 418 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 419 | case ABIArgInfo::Direct: |
| 420 | ResultType = ConvertType(RetTy); |
| 421 | break; |
| 422 | |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 423 | case ABIArgInfo::Indirect: { |
| 424 | assert(!RetAI.getIndirectAlign() && "Align unused on indirect return."); |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 425 | ResultType = llvm::Type::getVoidTy(getLLVMContext()); |
Daniel Dunbar | 62d5c1b | 2008-09-10 07:00:50 +0000 | [diff] [blame] | 426 | const llvm::Type *STy = ConvertType(RetTy); |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 427 | ArgTys.push_back(llvm::PointerType::get(STy, RetTy.getAddressSpace())); |
| 428 | break; |
| 429 | } |
| 430 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 431 | case ABIArgInfo::Ignore: |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 432 | ResultType = llvm::Type::getVoidTy(getLLVMContext()); |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 433 | break; |
| 434 | |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 435 | case ABIArgInfo::Coerce: |
Daniel Dunbar | 639ffe4 | 2008-09-10 07:04:09 +0000 | [diff] [blame] | 436 | ResultType = RetAI.getCoerceToType(); |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 437 | break; |
| 438 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 439 | |
| 440 | for (CGFunctionInfo::const_arg_iterator it = FI.arg_begin(), |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 441 | ie = FI.arg_end(); it != ie; ++it) { |
| 442 | const ABIArgInfo &AI = it->info; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 443 | |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 444 | switch (AI.getKind()) { |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 445 | case ABIArgInfo::Ignore: |
| 446 | break; |
| 447 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 448 | case ABIArgInfo::Coerce: |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 449 | ArgTys.push_back(AI.getCoerceToType()); |
| 450 | break; |
| 451 | |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 452 | case ABIArgInfo::Indirect: { |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 453 | // indirect arguments are always on the stack, which is addr space #0. |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 454 | const llvm::Type *LTy = ConvertTypeForMem(it->type); |
| 455 | ArgTys.push_back(llvm::PointerType::getUnqual(LTy)); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 456 | break; |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 457 | } |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 458 | |
| 459 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 460 | case ABIArgInfo::Direct: |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 461 | ArgTys.push_back(ConvertType(it->type)); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 462 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 463 | |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 464 | case ABIArgInfo::Expand: |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 465 | GetExpandedTypes(it->type, ArgTys); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 466 | break; |
| 467 | } |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 468 | } |
| 469 | |
Daniel Dunbar | bb36d33 | 2009-02-02 21:43:58 +0000 | [diff] [blame] | 470 | return llvm::FunctionType::get(ResultType, ArgTys, IsVariadic); |
Daniel Dunbar | 3913f18 | 2008-09-09 23:48:28 +0000 | [diff] [blame] | 471 | } |
| 472 | |
Anders Carlsson | ecf282b | 2009-11-24 05:08:52 +0000 | [diff] [blame] | 473 | static bool HasIncompleteReturnTypeOrArgumentTypes(const FunctionProtoType *T) { |
| 474 | if (const TagType *TT = T->getResultType()->getAs<TagType>()) { |
| 475 | if (!TT->getDecl()->isDefinition()) |
| 476 | return true; |
| 477 | } |
| 478 | |
| 479 | for (unsigned i = 0, e = T->getNumArgs(); i != e; ++i) { |
| 480 | if (const TagType *TT = T->getArgType(i)->getAs<TagType>()) { |
| 481 | if (!TT->getDecl()->isDefinition()) |
| 482 | return true; |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | return false; |
| 487 | } |
| 488 | |
| 489 | const llvm::Type * |
| 490 | CodeGenTypes::GetFunctionTypeForVtable(const CXXMethodDecl *MD) { |
| 491 | const FunctionProtoType *FPT = MD->getType()->getAs<FunctionProtoType>(); |
| 492 | |
| 493 | if (!HasIncompleteReturnTypeOrArgumentTypes(FPT)) |
| 494 | return GetFunctionType(getFunctionInfo(MD), FPT->isVariadic()); |
| 495 | |
| 496 | return llvm::OpaqueType::get(getLLVMContext()); |
| 497 | } |
| 498 | |
Daniel Dunbar | a0a99e0 | 2009-02-02 23:43:58 +0000 | [diff] [blame] | 499 | void CodeGenModule::ConstructAttributeList(const CGFunctionInfo &FI, |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 500 | const Decl *TargetDecl, |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 501 | AttributeListType &PAL, |
| 502 | unsigned &CallingConv) { |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 503 | unsigned FuncAttrs = 0; |
Devang Patel | a2c6912 | 2008-09-26 22:53:57 +0000 | [diff] [blame] | 504 | unsigned RetAttrs = 0; |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 505 | |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 506 | CallingConv = FI.getEffectiveCallingConvention(); |
| 507 | |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame^] | 508 | if (FI.isNoReturn()) |
| 509 | FuncAttrs |= llvm::Attribute::NoReturn; |
| 510 | |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 511 | // FIXME: handle sseregparm someday... |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 512 | if (TargetDecl) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 513 | if (TargetDecl->hasAttr<NoThrowAttr>()) |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 514 | FuncAttrs |= llvm::Attribute::NoUnwind; |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 515 | if (TargetDecl->hasAttr<NoReturnAttr>()) |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 516 | FuncAttrs |= llvm::Attribute::NoReturn; |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 517 | if (TargetDecl->hasAttr<ConstAttr>()) |
Anders Carlsson | 232eb7d | 2008-10-05 23:32:53 +0000 | [diff] [blame] | 518 | FuncAttrs |= llvm::Attribute::ReadNone; |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 519 | else if (TargetDecl->hasAttr<PureAttr>()) |
Daniel Dunbar | 64c2e07 | 2009-04-10 22:14:52 +0000 | [diff] [blame] | 520 | FuncAttrs |= llvm::Attribute::ReadOnly; |
Ryan Flynn | 76168e2 | 2009-08-09 20:07:29 +0000 | [diff] [blame] | 521 | if (TargetDecl->hasAttr<MallocAttr>()) |
| 522 | RetAttrs |= llvm::Attribute::NoAlias; |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 523 | } |
| 524 | |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 525 | if (CodeGenOpts.OptimizeSize) |
Daniel Dunbar | 7ab1c3e | 2009-10-27 19:48:08 +0000 | [diff] [blame] | 526 | FuncAttrs |= llvm::Attribute::OptimizeForSize; |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 527 | if (CodeGenOpts.DisableRedZone) |
Devang Patel | 24095da | 2009-06-04 23:32:02 +0000 | [diff] [blame] | 528 | FuncAttrs |= llvm::Attribute::NoRedZone; |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 529 | if (CodeGenOpts.NoImplicitFloat) |
Devang Patel | acebb39 | 2009-06-05 22:05:48 +0000 | [diff] [blame] | 530 | FuncAttrs |= llvm::Attribute::NoImplicitFloat; |
Devang Patel | 24095da | 2009-06-04 23:32:02 +0000 | [diff] [blame] | 531 | |
Daniel Dunbar | a0a99e0 | 2009-02-02 23:43:58 +0000 | [diff] [blame] | 532 | QualType RetTy = FI.getReturnType(); |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 533 | unsigned Index = 1; |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 534 | const ABIArgInfo &RetAI = FI.getReturnInfo(); |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 535 | switch (RetAI.getKind()) { |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 536 | case ABIArgInfo::Extend: |
| 537 | if (RetTy->isSignedIntegerType()) { |
| 538 | RetAttrs |= llvm::Attribute::SExt; |
| 539 | } else if (RetTy->isUnsignedIntegerType()) { |
| 540 | RetAttrs |= llvm::Attribute::ZExt; |
| 541 | } |
| 542 | // FALLTHROUGH |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 543 | case ABIArgInfo::Direct: |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 544 | break; |
| 545 | |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 546 | case ABIArgInfo::Indirect: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 547 | PAL.push_back(llvm::AttributeWithIndex::get(Index, |
Daniel Dunbar | 725ad31 | 2009-01-31 02:19:00 +0000 | [diff] [blame] | 548 | llvm::Attribute::StructRet | |
| 549 | llvm::Attribute::NoAlias)); |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 550 | ++Index; |
Daniel Dunbar | 0ac86f0 | 2009-03-18 19:51:01 +0000 | [diff] [blame] | 551 | // sret disables readnone and readonly |
| 552 | FuncAttrs &= ~(llvm::Attribute::ReadOnly | |
| 553 | llvm::Attribute::ReadNone); |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 554 | break; |
| 555 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 556 | case ABIArgInfo::Ignore: |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 557 | case ABIArgInfo::Coerce: |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 558 | break; |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 559 | |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 560 | case ABIArgInfo::Expand: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 561 | assert(0 && "Invalid ABI kind for return argument"); |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 562 | } |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 563 | |
Devang Patel | a2c6912 | 2008-09-26 22:53:57 +0000 | [diff] [blame] | 564 | if (RetAttrs) |
| 565 | PAL.push_back(llvm::AttributeWithIndex::get(0, RetAttrs)); |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 566 | |
| 567 | // FIXME: we need to honour command line settings also... |
| 568 | // FIXME: RegParm should be reduced in case of nested functions and/or global |
| 569 | // register variable. |
| 570 | signed RegParm = 0; |
| 571 | if (TargetDecl) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 572 | if (const RegparmAttr *RegParmAttr |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 573 | = TargetDecl->getAttr<RegparmAttr>()) |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 574 | RegParm = RegParmAttr->getNumParams(); |
| 575 | |
| 576 | unsigned PointerWidth = getContext().Target.getPointerWidth(0); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 577 | for (CGFunctionInfo::const_arg_iterator it = FI.arg_begin(), |
Daniel Dunbar | 88c2fa9 | 2009-02-03 05:31:23 +0000 | [diff] [blame] | 578 | ie = FI.arg_end(); it != ie; ++it) { |
| 579 | QualType ParamType = it->type; |
| 580 | const ABIArgInfo &AI = it->info; |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 581 | unsigned Attributes = 0; |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 582 | |
Nuno Lopes | 079b495 | 2009-12-07 18:30:06 +0000 | [diff] [blame] | 583 | if (ParamType.isRestrictQualified()) |
| 584 | Attributes |= llvm::Attribute::NoAlias; |
| 585 | |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 586 | switch (AI.getKind()) { |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 587 | case ABIArgInfo::Coerce: |
| 588 | break; |
| 589 | |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 590 | case ABIArgInfo::Indirect: |
Anders Carlsson | 0a8f847 | 2009-09-16 15:53:40 +0000 | [diff] [blame] | 591 | if (AI.getIndirectByVal()) |
| 592 | Attributes |= llvm::Attribute::ByVal; |
| 593 | |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 594 | Attributes |= |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 595 | llvm::Attribute::constructAlignmentFromInt(AI.getIndirectAlign()); |
Daniel Dunbar | 0ac86f0 | 2009-03-18 19:51:01 +0000 | [diff] [blame] | 596 | // byval disables readnone and readonly. |
| 597 | FuncAttrs &= ~(llvm::Attribute::ReadOnly | |
| 598 | llvm::Attribute::ReadNone); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 599 | break; |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 600 | |
| 601 | case ABIArgInfo::Extend: |
| 602 | if (ParamType->isSignedIntegerType()) { |
| 603 | Attributes |= llvm::Attribute::SExt; |
| 604 | } else if (ParamType->isUnsignedIntegerType()) { |
| 605 | Attributes |= llvm::Attribute::ZExt; |
| 606 | } |
| 607 | // FALLS THROUGH |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 608 | case ABIArgInfo::Direct: |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 609 | if (RegParm > 0 && |
| 610 | (ParamType->isIntegerType() || ParamType->isPointerType())) { |
| 611 | RegParm -= |
| 612 | (Context.getTypeSize(ParamType) + PointerWidth - 1) / PointerWidth; |
| 613 | if (RegParm >= 0) |
| 614 | Attributes |= llvm::Attribute::InReg; |
| 615 | } |
| 616 | // FIXME: handle sseregparm someday... |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 617 | break; |
Anton Korobeynikov | 1102f42 | 2009-04-04 00:49:24 +0000 | [diff] [blame] | 618 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 619 | case ABIArgInfo::Ignore: |
| 620 | // Skip increment, no matching LLVM parameter. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 621 | continue; |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 622 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 623 | case ABIArgInfo::Expand: { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 624 | std::vector<const llvm::Type*> Tys; |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 625 | // FIXME: This is rather inefficient. Do we ever actually need to do |
| 626 | // anything here? The result should be just reconstructed on the other |
| 627 | // side, so extension should be a non-issue. |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 628 | getTypes().GetExpandedTypes(ParamType, Tys); |
| 629 | Index += Tys.size(); |
| 630 | continue; |
| 631 | } |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 632 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 633 | |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 634 | if (Attributes) |
| 635 | PAL.push_back(llvm::AttributeWithIndex::get(Index, Attributes)); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 636 | ++Index; |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 637 | } |
Devang Patel | a2c6912 | 2008-09-26 22:53:57 +0000 | [diff] [blame] | 638 | if (FuncAttrs) |
| 639 | PAL.push_back(llvm::AttributeWithIndex::get(~0, FuncAttrs)); |
Daniel Dunbar | 5323a4b | 2008-09-10 00:32:18 +0000 | [diff] [blame] | 640 | } |
| 641 | |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 642 | void CodeGenFunction::EmitFunctionProlog(const CGFunctionInfo &FI, |
| 643 | llvm::Function *Fn, |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 644 | const FunctionArgList &Args) { |
John McCall | 0cfeb63 | 2009-07-28 01:00:58 +0000 | [diff] [blame] | 645 | // If this is an implicit-return-zero function, go ahead and |
| 646 | // initialize the return value. TODO: it might be nice to have |
| 647 | // a more general mechanism for this that didn't require synthesized |
| 648 | // return statements. |
Anders Carlsson | 89ed31d | 2009-08-08 23:24:23 +0000 | [diff] [blame] | 649 | if (const FunctionDecl* FD = dyn_cast_or_null<FunctionDecl>(CurFuncDecl)) { |
John McCall | 0cfeb63 | 2009-07-28 01:00:58 +0000 | [diff] [blame] | 650 | if (FD->hasImplicitReturnZero()) { |
| 651 | QualType RetTy = FD->getResultType().getUnqualifiedType(); |
| 652 | const llvm::Type* LLVMTy = CGM.getTypes().ConvertType(RetTy); |
Owen Anderson | c9c88b4 | 2009-07-31 20:28:54 +0000 | [diff] [blame] | 653 | llvm::Constant* Zero = llvm::Constant::getNullValue(LLVMTy); |
John McCall | 0cfeb63 | 2009-07-28 01:00:58 +0000 | [diff] [blame] | 654 | Builder.CreateStore(Zero, ReturnValue); |
| 655 | } |
| 656 | } |
| 657 | |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 658 | // FIXME: We no longer need the types from FunctionArgList; lift up and |
| 659 | // simplify. |
Daniel Dunbar | 5251afa | 2009-02-03 06:02:10 +0000 | [diff] [blame] | 660 | |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 661 | // Emit allocs for param decls. Give the LLVM Argument nodes names. |
| 662 | llvm::Function::arg_iterator AI = Fn->arg_begin(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 663 | |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 664 | // Name the struct return argument. |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 665 | if (CGM.ReturnTypeUsesSret(FI)) { |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 666 | AI->setName("agg.result"); |
| 667 | ++AI; |
| 668 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 669 | |
Daniel Dunbar | 4b5f0a4 | 2009-02-04 21:17:21 +0000 | [diff] [blame] | 670 | assert(FI.arg_size() == Args.size() && |
| 671 | "Mismatch between function signature & arguments."); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 672 | CGFunctionInfo::const_arg_iterator info_it = FI.arg_begin(); |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 673 | for (FunctionArgList::const_iterator i = Args.begin(), e = Args.end(); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 674 | i != e; ++i, ++info_it) { |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 675 | const VarDecl *Arg = i->first; |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 676 | QualType Ty = info_it->type; |
| 677 | const ABIArgInfo &ArgI = info_it->info; |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 678 | |
| 679 | switch (ArgI.getKind()) { |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 680 | case ABIArgInfo::Indirect: { |
| 681 | llvm::Value* V = AI; |
| 682 | if (hasAggregateLLVMType(Ty)) { |
| 683 | // Do nothing, aggregates and complex variables are accessed by |
| 684 | // reference. |
| 685 | } else { |
| 686 | // Load scalar value from indirect argument. |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 687 | V = EmitLoadOfScalar(V, false, Ty); |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 688 | if (!getContext().typesAreCompatible(Ty, Arg->getType())) { |
| 689 | // This must be a promotion, for something like |
| 690 | // "void a(x) short x; {..." |
| 691 | V = EmitScalarConversion(V, Ty, Arg->getType()); |
| 692 | } |
| 693 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 694 | EmitParmDecl(*Arg, V); |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 695 | break; |
| 696 | } |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 697 | |
| 698 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 699 | case ABIArgInfo::Direct: { |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 700 | assert(AI != Fn->arg_end() && "Argument mismatch!"); |
| 701 | llvm::Value* V = AI; |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 702 | if (hasAggregateLLVMType(Ty)) { |
| 703 | // Create a temporary alloca to hold the argument; the rest of |
| 704 | // codegen expects to access aggregates & complex values by |
| 705 | // reference. |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 706 | V = CreateTempAlloca(ConvertTypeForMem(Ty)); |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 707 | Builder.CreateStore(AI, V); |
| 708 | } else { |
| 709 | if (!getContext().typesAreCompatible(Ty, Arg->getType())) { |
| 710 | // This must be a promotion, for something like |
| 711 | // "void a(x) short x; {..." |
| 712 | V = EmitScalarConversion(V, Ty, Arg->getType()); |
| 713 | } |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 714 | } |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 715 | EmitParmDecl(*Arg, V); |
| 716 | break; |
| 717 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 718 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 719 | case ABIArgInfo::Expand: { |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 720 | // If this structure was expanded into multiple arguments then |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 721 | // we need to create a temporary and reconstruct it from the |
| 722 | // arguments. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 723 | llvm::Value *Temp = CreateTempAlloca(ConvertTypeForMem(Ty), |
Daniel Dunbar | 259e9cc | 2009-10-19 01:21:05 +0000 | [diff] [blame] | 724 | Arg->getName() + ".addr"); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 725 | // FIXME: What are the right qualifiers here? |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 726 | llvm::Function::arg_iterator End = |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 727 | ExpandTypeFromArgs(Ty, LValue::MakeAddr(Temp, Qualifiers()), AI); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 728 | EmitParmDecl(*Arg, Temp); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 729 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 730 | // Name the arguments used in expansion and increment AI. |
| 731 | unsigned Index = 0; |
| 732 | for (; AI != End; ++AI, ++Index) |
Daniel Dunbar | 259e9cc | 2009-10-19 01:21:05 +0000 | [diff] [blame] | 733 | AI->setName(Arg->getName() + "." + llvm::Twine(Index)); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 734 | continue; |
| 735 | } |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 736 | |
| 737 | case ABIArgInfo::Ignore: |
Daniel Dunbar | 8b979d9 | 2009-02-10 00:06:49 +0000 | [diff] [blame] | 738 | // Initialize the local variable appropriately. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 739 | if (hasAggregateLLVMType(Ty)) { |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 740 | EmitParmDecl(*Arg, CreateTempAlloca(ConvertTypeForMem(Ty))); |
Daniel Dunbar | 8b979d9 | 2009-02-10 00:06:49 +0000 | [diff] [blame] | 741 | } else { |
| 742 | EmitParmDecl(*Arg, llvm::UndefValue::get(ConvertType(Arg->getType()))); |
| 743 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 744 | |
Daniel Dunbar | 59e5a0e | 2009-02-03 20:00:13 +0000 | [diff] [blame] | 745 | // Skip increment, no matching LLVM parameter. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 746 | continue; |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 747 | |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 748 | case ABIArgInfo::Coerce: { |
| 749 | assert(AI != Fn->arg_end() && "Argument mismatch!"); |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 750 | // FIXME: This is very wasteful; EmitParmDecl is just going to drop the |
| 751 | // result in a new alloca anyway, so we could just store into that |
| 752 | // directly if we broke the abstraction down more. |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 753 | llvm::Value *V = CreateTempAlloca(ConvertTypeForMem(Ty), "coerce"); |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 754 | CreateCoercedStore(AI, V, /*DestIsVolatile=*/false, *this); |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 755 | // Match to what EmitParmDecl is expecting for this type. |
Daniel Dunbar | 8b29a38 | 2009-02-04 07:22:24 +0000 | [diff] [blame] | 756 | if (!CodeGenFunction::hasAggregateLLVMType(Ty)) { |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 757 | V = EmitLoadOfScalar(V, false, Ty); |
Daniel Dunbar | 8b29a38 | 2009-02-04 07:22:24 +0000 | [diff] [blame] | 758 | if (!getContext().typesAreCompatible(Ty, Arg->getType())) { |
| 759 | // This must be a promotion, for something like |
| 760 | // "void a(x) short x; {..." |
| 761 | V = EmitScalarConversion(V, Ty, Arg->getType()); |
| 762 | } |
| 763 | } |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 764 | EmitParmDecl(*Arg, V); |
| 765 | break; |
| 766 | } |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 767 | } |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 768 | |
| 769 | ++AI; |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 770 | } |
| 771 | assert(AI == Fn->arg_end() && "Argument mismatch!"); |
| 772 | } |
| 773 | |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 774 | void CodeGenFunction::EmitFunctionEpilog(const CGFunctionInfo &FI, |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 775 | llvm::Value *ReturnValue) { |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 776 | llvm::Value *RV = 0; |
| 777 | |
| 778 | // Functions with no result always return void. |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 779 | if (ReturnValue) { |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 780 | QualType RetTy = FI.getReturnType(); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 781 | const ABIArgInfo &RetAI = FI.getReturnInfo(); |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 782 | |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 783 | switch (RetAI.getKind()) { |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 784 | case ABIArgInfo::Indirect: |
Daniel Dunbar | 3aea8ca | 2008-12-18 04:52:14 +0000 | [diff] [blame] | 785 | if (RetTy->isAnyComplexType()) { |
Daniel Dunbar | 3aea8ca | 2008-12-18 04:52:14 +0000 | [diff] [blame] | 786 | ComplexPairTy RT = LoadComplexFromAddr(ReturnValue, false); |
| 787 | StoreComplexToAddr(RT, CurFn->arg_begin(), false); |
| 788 | } else if (CodeGenFunction::hasAggregateLLVMType(RetTy)) { |
Eli Friedman | b17daf9 | 2009-12-04 02:43:40 +0000 | [diff] [blame] | 789 | // Do nothing; aggregrates get evaluated directly into the destination. |
Daniel Dunbar | 3aea8ca | 2008-12-18 04:52:14 +0000 | [diff] [blame] | 790 | } else { |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 791 | EmitStoreOfScalar(Builder.CreateLoad(ReturnValue), CurFn->arg_begin(), |
Anders Carlsson | b4aa466 | 2009-05-19 18:50:41 +0000 | [diff] [blame] | 792 | false, RetTy); |
Daniel Dunbar | 3aea8ca | 2008-12-18 04:52:14 +0000 | [diff] [blame] | 793 | } |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 794 | break; |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 795 | |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 796 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 797 | case ABIArgInfo::Direct: |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 798 | // The internal return value temp always will have |
| 799 | // pointer-to-return-type type. |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 800 | RV = Builder.CreateLoad(ReturnValue); |
| 801 | break; |
| 802 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 803 | case ABIArgInfo::Ignore: |
| 804 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 805 | |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 806 | case ABIArgInfo::Coerce: |
Daniel Dunbar | 54d1ccb | 2009-01-27 01:36:03 +0000 | [diff] [blame] | 807 | RV = CreateCoercedLoad(ReturnValue, RetAI.getCoerceToType(), *this); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 808 | break; |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 809 | |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 810 | case ABIArgInfo::Expand: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 811 | assert(0 && "Invalid ABI kind for return argument"); |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 812 | } |
| 813 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 814 | |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 815 | if (RV) { |
| 816 | Builder.CreateRet(RV); |
| 817 | } else { |
| 818 | Builder.CreateRetVoid(); |
| 819 | } |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 820 | } |
| 821 | |
Anders Carlsson | 0139bb9 | 2009-04-08 20:47:54 +0000 | [diff] [blame] | 822 | RValue CodeGenFunction::EmitCallArg(const Expr *E, QualType ArgType) { |
Anders Carlsson | 4029ca7 | 2009-05-20 00:24:07 +0000 | [diff] [blame] | 823 | if (ArgType->isReferenceType()) |
Anders Carlsson | a64a869 | 2010-02-03 16:38:03 +0000 | [diff] [blame] | 824 | return EmitReferenceBindingToExpr(E); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 825 | |
Anders Carlsson | 0139bb9 | 2009-04-08 20:47:54 +0000 | [diff] [blame] | 826 | return EmitAnyExprToTemp(E); |
| 827 | } |
| 828 | |
Daniel Dunbar | 88b5396 | 2009-02-02 22:03:45 +0000 | [diff] [blame] | 829 | RValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 830 | llvm::Value *Callee, |
Anders Carlsson | f3c47c9 | 2009-12-24 19:25:24 +0000 | [diff] [blame] | 831 | ReturnValueSlot ReturnValue, |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 832 | const CallArgList &CallArgs, |
| 833 | const Decl *TargetDecl) { |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 834 | // 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] | 835 | llvm::SmallVector<llvm::Value*, 16> Args; |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 836 | |
| 837 | // Handle struct-return functions by passing a pointer to the |
| 838 | // location that we would like to return into. |
Daniel Dunbar | bb36d33 | 2009-02-02 21:43:58 +0000 | [diff] [blame] | 839 | QualType RetTy = CallInfo.getReturnType(); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 840 | const ABIArgInfo &RetAI = CallInfo.getReturnInfo(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 841 | |
| 842 | |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 843 | // If the call returns a temporary with struct return, create a temporary |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 844 | // alloca to hold the result, unless one is given to us. |
| 845 | if (CGM.ReturnTypeUsesSret(CallInfo)) { |
| 846 | llvm::Value *Value = ReturnValue.getValue(); |
| 847 | if (!Value) |
| 848 | Value = CreateTempAlloca(ConvertTypeForMem(RetTy)); |
| 849 | Args.push_back(Value); |
| 850 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 851 | |
Daniel Dunbar | 4b5f0a4 | 2009-02-04 21:17:21 +0000 | [diff] [blame] | 852 | assert(CallInfo.arg_size() == CallArgs.size() && |
| 853 | "Mismatch between function signature & arguments."); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 854 | CGFunctionInfo::const_arg_iterator info_it = CallInfo.arg_begin(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 855 | for (CallArgList::const_iterator I = CallArgs.begin(), E = CallArgs.end(); |
Daniel Dunbar | b225be4 | 2009-02-03 05:59:18 +0000 | [diff] [blame] | 856 | I != E; ++I, ++info_it) { |
| 857 | const ABIArgInfo &ArgInfo = info_it->info; |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 858 | RValue RV = I->first; |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 859 | |
| 860 | switch (ArgInfo.getKind()) { |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 861 | case ABIArgInfo::Indirect: |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 862 | if (RV.isScalar() || RV.isComplex()) { |
| 863 | // Make a temporary alloca to pass the argument. |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 864 | Args.push_back(CreateTempAlloca(ConvertTypeForMem(I->second))); |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 865 | if (RV.isScalar()) |
Anders Carlsson | b4aa466 | 2009-05-19 18:50:41 +0000 | [diff] [blame] | 866 | EmitStoreOfScalar(RV.getScalarVal(), Args.back(), false, I->second); |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 867 | else |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 868 | StoreComplexToAddr(RV.getComplexVal(), Args.back(), false); |
Daniel Dunbar | 1f74598 | 2009-02-05 09:16:39 +0000 | [diff] [blame] | 869 | } else { |
| 870 | Args.push_back(RV.getAggregateAddr()); |
| 871 | } |
| 872 | break; |
| 873 | |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 874 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 875 | case ABIArgInfo::Direct: |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 876 | if (RV.isScalar()) { |
| 877 | Args.push_back(RV.getScalarVal()); |
| 878 | } else if (RV.isComplex()) { |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 879 | llvm::Value *Tmp = llvm::UndefValue::get(ConvertType(I->second)); |
| 880 | Tmp = Builder.CreateInsertValue(Tmp, RV.getComplexVal().first, 0); |
| 881 | Tmp = Builder.CreateInsertValue(Tmp, RV.getComplexVal().second, 1); |
| 882 | Args.push_back(Tmp); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 883 | } else { |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 884 | Args.push_back(Builder.CreateLoad(RV.getAggregateAddr())); |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 885 | } |
| 886 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 887 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 888 | case ABIArgInfo::Ignore: |
| 889 | break; |
| 890 | |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 891 | case ABIArgInfo::Coerce: { |
| 892 | // FIXME: Avoid the conversion through memory if possible. |
| 893 | llvm::Value *SrcPtr; |
| 894 | if (RV.isScalar()) { |
Daniel Dunbar | 5a1be6e | 2009-02-03 23:04:57 +0000 | [diff] [blame] | 895 | SrcPtr = CreateTempAlloca(ConvertTypeForMem(I->second), "coerce"); |
Anders Carlsson | b4aa466 | 2009-05-19 18:50:41 +0000 | [diff] [blame] | 896 | EmitStoreOfScalar(RV.getScalarVal(), SrcPtr, false, I->second); |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 897 | } else if (RV.isComplex()) { |
Daniel Dunbar | adc8bdd | 2009-02-10 01:51:39 +0000 | [diff] [blame] | 898 | SrcPtr = CreateTempAlloca(ConvertTypeForMem(I->second), "coerce"); |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 899 | StoreComplexToAddr(RV.getComplexVal(), SrcPtr, false); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 900 | } else |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 901 | SrcPtr = RV.getAggregateAddr(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 902 | Args.push_back(CreateCoercedLoad(SrcPtr, ArgInfo.getCoerceToType(), |
Daniel Dunbar | 89c9d8e | 2009-02-03 19:12:28 +0000 | [diff] [blame] | 903 | *this)); |
| 904 | break; |
| 905 | } |
| 906 | |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 907 | case ABIArgInfo::Expand: |
| 908 | ExpandTypeToArgs(I->second, RV, Args); |
| 909 | break; |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 910 | } |
| 911 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 912 | |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 913 | // If the callee is a bitcast of a function to a varargs pointer to function |
| 914 | // type, check to see if we can remove the bitcast. This handles some cases |
| 915 | // with unprototyped functions. |
| 916 | if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Callee)) |
| 917 | if (llvm::Function *CalleeF = dyn_cast<llvm::Function>(CE->getOperand(0))) { |
| 918 | const llvm::PointerType *CurPT=cast<llvm::PointerType>(Callee->getType()); |
| 919 | const llvm::FunctionType *CurFT = |
| 920 | cast<llvm::FunctionType>(CurPT->getElementType()); |
| 921 | const llvm::FunctionType *ActualFT = CalleeF->getFunctionType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 922 | |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 923 | if (CE->getOpcode() == llvm::Instruction::BitCast && |
| 924 | ActualFT->getReturnType() == CurFT->getReturnType() && |
Chris Lattner | d6bebbf | 2009-06-23 01:38:41 +0000 | [diff] [blame] | 925 | ActualFT->getNumParams() == CurFT->getNumParams() && |
| 926 | ActualFT->getNumParams() == Args.size()) { |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 927 | bool ArgsMatch = true; |
| 928 | for (unsigned i = 0, e = ActualFT->getNumParams(); i != e; ++i) |
| 929 | if (ActualFT->getParamType(i) != CurFT->getParamType(i)) { |
| 930 | ArgsMatch = false; |
| 931 | break; |
| 932 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 933 | |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 934 | // Strip the cast if we can get away with it. This is a nice cleanup, |
| 935 | // but also allows us to inline the function at -O0 if it is marked |
| 936 | // always_inline. |
| 937 | if (ArgsMatch) |
| 938 | Callee = CalleeF; |
| 939 | } |
| 940 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 941 | |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 942 | |
Daniel Dunbar | 9834ffb | 2009-02-23 17:26:39 +0000 | [diff] [blame] | 943 | llvm::BasicBlock *InvokeDest = getInvokeDest(); |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 944 | unsigned CallingConv; |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 945 | CodeGen::AttributeListType AttributeList; |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 946 | CGM.ConstructAttributeList(CallInfo, TargetDecl, AttributeList, CallingConv); |
Daniel Dunbar | 9834ffb | 2009-02-23 17:26:39 +0000 | [diff] [blame] | 947 | llvm::AttrListPtr Attrs = llvm::AttrListPtr::get(AttributeList.begin(), |
| 948 | AttributeList.end()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 949 | |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 950 | llvm::CallSite CS; |
| 951 | if (!InvokeDest || (Attrs.getFnAttributes() & llvm::Attribute::NoUnwind)) { |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 952 | CS = Builder.CreateCall(Callee, Args.data(), Args.data()+Args.size()); |
Daniel Dunbar | 9834ffb | 2009-02-23 17:26:39 +0000 | [diff] [blame] | 953 | } else { |
| 954 | llvm::BasicBlock *Cont = createBasicBlock("invoke.cont"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 955 | CS = Builder.CreateInvoke(Callee, Cont, InvokeDest, |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 956 | Args.data(), Args.data()+Args.size()); |
Daniel Dunbar | 9834ffb | 2009-02-23 17:26:39 +0000 | [diff] [blame] | 957 | EmitBlock(Cont); |
Daniel Dunbar | f4fe0f0 | 2009-02-20 18:54:31 +0000 | [diff] [blame] | 958 | } |
| 959 | |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 960 | CS.setAttributes(Attrs); |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 961 | CS.setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 962 | |
| 963 | // If the call doesn't return, finish the basic block and clear the |
| 964 | // insertion point; this allows the rest of IRgen to discard |
| 965 | // unreachable code. |
| 966 | if (CS.doesNotReturn()) { |
| 967 | Builder.CreateUnreachable(); |
| 968 | Builder.ClearInsertionPoint(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 969 | |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 970 | // FIXME: For now, emit a dummy basic block because expr emitters in |
| 971 | // generally are not ready to handle emitting expressions at unreachable |
| 972 | // points. |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 973 | EnsureInsertPoint(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 974 | |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 975 | // Return a reasonable RValue. |
| 976 | return GetUndefRValue(RetTy); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 977 | } |
Daniel Dunbar | d14151d | 2009-03-02 04:32:35 +0000 | [diff] [blame] | 978 | |
| 979 | llvm::Instruction *CI = CS.getInstruction(); |
Benjamin Kramer | ffbb15e | 2009-10-05 13:47:21 +0000 | [diff] [blame] | 980 | if (Builder.isNamePreserving() && !CI->getType()->isVoidTy()) |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 981 | CI->setName("call"); |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 982 | |
| 983 | switch (RetAI.getKind()) { |
Daniel Dunbar | 11e383a | 2009-02-05 08:00:50 +0000 | [diff] [blame] | 984 | case ABIArgInfo::Indirect: |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 985 | if (RetTy->isAnyComplexType()) |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 986 | return RValue::getComplex(LoadComplexFromAddr(Args[0], false)); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 987 | if (CodeGenFunction::hasAggregateLLVMType(RetTy)) |
Daniel Dunbar | 5627377 | 2008-09-17 00:51:38 +0000 | [diff] [blame] | 988 | return RValue::getAggregate(Args[0]); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 989 | return RValue::get(EmitLoadOfScalar(Args[0], false, RetTy)); |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 990 | |
Anton Korobeynikov | cc6fa88 | 2009-06-06 09:36:29 +0000 | [diff] [blame] | 991 | case ABIArgInfo::Extend: |
Daniel Dunbar | 46327aa | 2009-02-03 06:17:37 +0000 | [diff] [blame] | 992 | case ABIArgInfo::Direct: |
Daniel Dunbar | 2fbf2f5 | 2009-02-05 11:13:54 +0000 | [diff] [blame] | 993 | if (RetTy->isAnyComplexType()) { |
| 994 | llvm::Value *Real = Builder.CreateExtractValue(CI, 0); |
| 995 | llvm::Value *Imag = Builder.CreateExtractValue(CI, 1); |
| 996 | return RValue::getComplex(std::make_pair(Real, Imag)); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 997 | } |
| 998 | if (CodeGenFunction::hasAggregateLLVMType(RetTy)) { |
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), "agg.tmp"); |
| 1004 | DestIsVolatile = false; |
| 1005 | } |
| 1006 | Builder.CreateStore(CI, DestPtr, DestIsVolatile); |
| 1007 | return RValue::getAggregate(DestPtr); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 1008 | } |
| 1009 | return RValue::get(CI); |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 1010 | |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 1011 | case ABIArgInfo::Ignore: |
Daniel Dunbar | 0bcc521 | 2009-02-03 06:30:17 +0000 | [diff] [blame] | 1012 | // If we are ignoring an argument that had a result, make sure to |
| 1013 | // construct the appropriate return value for our caller. |
Daniel Dunbar | 13e8173 | 2009-02-05 07:09:07 +0000 | [diff] [blame] | 1014 | return GetUndefRValue(RetTy); |
Daniel Dunbar | 1143492 | 2009-01-26 21:26:08 +0000 | [diff] [blame] | 1015 | |
Daniel Dunbar | 639ffe4 | 2008-09-10 07:04:09 +0000 | [diff] [blame] | 1016 | case ABIArgInfo::Coerce: { |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 1017 | llvm::Value *DestPtr = ReturnValue.getValue(); |
| 1018 | bool DestIsVolatile = ReturnValue.isVolatile(); |
| 1019 | |
| 1020 | if (!DestPtr) { |
| 1021 | DestPtr = CreateTempAlloca(ConvertTypeForMem(RetTy), "coerce"); |
| 1022 | DestIsVolatile = false; |
| 1023 | } |
| 1024 | |
| 1025 | CreateCoercedStore(CI, DestPtr, DestIsVolatile, *this); |
Anders Carlsson | ad3d691 | 2008-11-25 22:21:48 +0000 | [diff] [blame] | 1026 | if (RetTy->isAnyComplexType()) |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 1027 | return RValue::getComplex(LoadComplexFromAddr(DestPtr, false)); |
Chris Lattner | 3403084 | 2009-03-22 00:32:22 +0000 | [diff] [blame] | 1028 | if (CodeGenFunction::hasAggregateLLVMType(RetTy)) |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 1029 | return RValue::getAggregate(DestPtr); |
| 1030 | return RValue::get(EmitLoadOfScalar(DestPtr, false, RetTy)); |
Daniel Dunbar | 639ffe4 | 2008-09-10 07:04:09 +0000 | [diff] [blame] | 1031 | } |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 1032 | |
Daniel Dunbar | 8951dbd | 2008-09-11 01:48:57 +0000 | [diff] [blame] | 1033 | case ABIArgInfo::Expand: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1034 | assert(0 && "Invalid ABI kind for return argument"); |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 1035 | } |
Daniel Dunbar | 2c8e0f3 | 2008-09-10 02:41:04 +0000 | [diff] [blame] | 1036 | |
| 1037 | assert(0 && "Unhandled ABIArgInfo::Kind"); |
| 1038 | return RValue::get(0); |
Daniel Dunbar | 17b708d | 2008-09-09 23:27:19 +0000 | [diff] [blame] | 1039 | } |
Daniel Dunbar | b4094ea | 2009-02-10 20:44:09 +0000 | [diff] [blame] | 1040 | |
| 1041 | /* VarArg handling */ |
| 1042 | |
| 1043 | llvm::Value *CodeGenFunction::EmitVAArg(llvm::Value *VAListAddr, QualType Ty) { |
| 1044 | return CGM.getTypes().getABIInfo().EmitVAArg(VAListAddr, Ty, *this); |
| 1045 | } |