Anders Carlsson | 5b95592 | 2009-11-24 05:51:11 +0000 | [diff] [blame] | 1 | //===--- CGExprCXX.cpp - Emit LLVM Code for C++ expressions ---------------===// |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 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 | // This contains code dealing with code generation of C++ expressions |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
Devang Patel | c69e1cf | 2010-09-30 19:05:55 +0000 | [diff] [blame] | 14 | #include "clang/Frontend/CodeGenOptions.h" |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 15 | #include "CodeGenFunction.h" |
John McCall | 4c40d98 | 2010-08-31 07:33:07 +0000 | [diff] [blame] | 16 | #include "CGCXXABI.h" |
Fariborz Jahanian | 842ddd0 | 2010-05-20 21:38:57 +0000 | [diff] [blame] | 17 | #include "CGObjCRuntime.h" |
Devang Patel | c69e1cf | 2010-09-30 19:05:55 +0000 | [diff] [blame] | 18 | #include "CGDebugInfo.h" |
Chris Lattner | 6c552c1 | 2010-07-20 20:19:24 +0000 | [diff] [blame] | 19 | #include "llvm/Intrinsics.h" |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 20 | using namespace clang; |
| 21 | using namespace CodeGen; |
| 22 | |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 23 | RValue CodeGenFunction::EmitCXXMemberCall(const CXXMethodDecl *MD, |
| 24 | llvm::Value *Callee, |
| 25 | ReturnValueSlot ReturnValue, |
| 26 | llvm::Value *This, |
Anders Carlsson | c997d42 | 2010-01-02 01:01:18 +0000 | [diff] [blame] | 27 | llvm::Value *VTT, |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 28 | CallExpr::const_arg_iterator ArgBeg, |
| 29 | CallExpr::const_arg_iterator ArgEnd) { |
| 30 | assert(MD->isInstance() && |
| 31 | "Trying to emit a member call expr on a static method!"); |
| 32 | |
| 33 | const FunctionProtoType *FPT = MD->getType()->getAs<FunctionProtoType>(); |
| 34 | |
| 35 | CallArgList Args; |
| 36 | |
| 37 | // Push the this ptr. |
| 38 | Args.push_back(std::make_pair(RValue::get(This), |
| 39 | MD->getThisType(getContext()))); |
| 40 | |
Anders Carlsson | c997d42 | 2010-01-02 01:01:18 +0000 | [diff] [blame] | 41 | // If there is a VTT parameter, emit it. |
| 42 | if (VTT) { |
| 43 | QualType T = getContext().getPointerType(getContext().VoidPtrTy); |
| 44 | Args.push_back(std::make_pair(RValue::get(VTT), T)); |
| 45 | } |
| 46 | |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 47 | // And the rest of the call args |
| 48 | EmitCallArgs(Args, FPT, ArgBeg, ArgEnd); |
| 49 | |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 50 | QualType ResultType = FPT->getResultType(); |
| 51 | return EmitCall(CGM.getTypes().getFunctionInfo(ResultType, Args, |
Rafael Espindola | 264ba48 | 2010-03-30 20:24:48 +0000 | [diff] [blame] | 52 | FPT->getExtInfo()), |
| 53 | Callee, ReturnValue, Args, MD); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 54 | } |
| 55 | |
| 56 | /// canDevirtualizeMemberFunctionCalls - Checks whether virtual calls on given |
| 57 | /// expr can be devirtualized. |
Fariborz Jahanian | 7ac0ff2 | 2011-01-21 01:04:41 +0000 | [diff] [blame] | 58 | static bool canDevirtualizeMemberFunctionCalls(ASTContext &Context, |
| 59 | const Expr *Base, |
Anders Carlsson | bd2bfae | 2010-10-27 13:28:46 +0000 | [diff] [blame] | 60 | const CXXMethodDecl *MD) { |
| 61 | |
Fariborz Jahanian | 7ac0ff2 | 2011-01-21 01:04:41 +0000 | [diff] [blame] | 62 | // Cannot divirtualize in kext mode. |
| 63 | if (Context.getLangOptions().AppleKext) |
| 64 | return false; |
| 65 | |
Anders Carlsson | f89e042 | 2011-01-23 21:07:30 +0000 | [diff] [blame] | 66 | // If the member function is marked 'final', we know that it can't be |
Anders Carlsson | d66f428 | 2010-10-27 13:34:43 +0000 | [diff] [blame] | 67 | // overridden and can therefore devirtualize it. |
Anders Carlsson | cb88a1f | 2011-01-24 16:26:15 +0000 | [diff] [blame] | 68 | if (MD->hasAttr<FinalAttr>()) |
Anders Carlsson | bd2bfae | 2010-10-27 13:28:46 +0000 | [diff] [blame] | 69 | return true; |
Anders Carlsson | d66f428 | 2010-10-27 13:34:43 +0000 | [diff] [blame] | 70 | |
Anders Carlsson | f89e042 | 2011-01-23 21:07:30 +0000 | [diff] [blame] | 71 | // Similarly, if the class itself is marked 'final' it can't be overridden |
| 72 | // and we can therefore devirtualize the member function call. |
Anders Carlsson | cb88a1f | 2011-01-24 16:26:15 +0000 | [diff] [blame] | 73 | if (MD->getParent()->hasAttr<FinalAttr>()) |
Anders Carlsson | d66f428 | 2010-10-27 13:34:43 +0000 | [diff] [blame] | 74 | return true; |
| 75 | |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 76 | if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Base)) { |
| 77 | if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) { |
| 78 | // This is a record decl. We know the type and can devirtualize it. |
| 79 | return VD->getType()->isRecordType(); |
| 80 | } |
| 81 | |
| 82 | return false; |
| 83 | } |
| 84 | |
| 85 | // We can always devirtualize calls on temporary object expressions. |
Eli Friedman | 6997aae | 2010-01-31 20:58:15 +0000 | [diff] [blame] | 86 | if (isa<CXXConstructExpr>(Base)) |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 87 | return true; |
| 88 | |
| 89 | // And calls on bound temporaries. |
| 90 | if (isa<CXXBindTemporaryExpr>(Base)) |
| 91 | return true; |
| 92 | |
| 93 | // Check if this is a call expr that returns a record type. |
| 94 | if (const CallExpr *CE = dyn_cast<CallExpr>(Base)) |
| 95 | return CE->getCallReturnType()->isRecordType(); |
Anders Carlsson | bd2bfae | 2010-10-27 13:28:46 +0000 | [diff] [blame] | 96 | |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 97 | // We can't devirtualize the call. |
| 98 | return false; |
| 99 | } |
| 100 | |
Francois Pichet | dbee341 | 2011-01-18 05:04:39 +0000 | [diff] [blame] | 101 | // Note: This function also emit constructor calls to support a MSVC |
| 102 | // extensions allowing explicit constructor function call. |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 103 | RValue CodeGenFunction::EmitCXXMemberCallExpr(const CXXMemberCallExpr *CE, |
| 104 | ReturnValueSlot ReturnValue) { |
| 105 | if (isa<BinaryOperator>(CE->getCallee()->IgnoreParens())) |
| 106 | return EmitCXXMemberPointerCallExpr(CE, ReturnValue); |
| 107 | |
| 108 | const MemberExpr *ME = cast<MemberExpr>(CE->getCallee()->IgnoreParens()); |
| 109 | const CXXMethodDecl *MD = cast<CXXMethodDecl>(ME->getMemberDecl()); |
| 110 | |
Devang Patel | c69e1cf | 2010-09-30 19:05:55 +0000 | [diff] [blame] | 111 | CGDebugInfo *DI = getDebugInfo(); |
Devang Patel | 6802027 | 2010-10-22 18:56:27 +0000 | [diff] [blame] | 112 | if (DI && CGM.getCodeGenOpts().LimitDebugInfo |
| 113 | && !isa<CallExpr>(ME->getBase())) { |
Devang Patel | c69e1cf | 2010-09-30 19:05:55 +0000 | [diff] [blame] | 114 | QualType PQTy = ME->getBase()->IgnoreParenImpCasts()->getType(); |
| 115 | if (const PointerType * PTy = dyn_cast<PointerType>(PQTy)) { |
| 116 | DI->getOrCreateRecordType(PTy->getPointeeType(), |
| 117 | MD->getParent()->getLocation()); |
| 118 | } |
| 119 | } |
| 120 | |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 121 | if (MD->isStatic()) { |
| 122 | // The method is static, emit it as we would a regular call. |
| 123 | llvm::Value *Callee = CGM.GetAddrOfFunction(MD); |
| 124 | return EmitCall(getContext().getPointerType(MD->getType()), Callee, |
| 125 | ReturnValue, CE->arg_begin(), CE->arg_end()); |
| 126 | } |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 127 | |
John McCall | fc40028 | 2010-09-03 01:26:39 +0000 | [diff] [blame] | 128 | // Compute the object pointer. |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 129 | llvm::Value *This; |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 130 | if (ME->isArrow()) |
| 131 | This = EmitScalarExpr(ME->getBase()); |
John McCall | 0e800c9 | 2010-12-04 08:14:53 +0000 | [diff] [blame] | 132 | else |
| 133 | This = EmitLValue(ME->getBase()).getAddress(); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 134 | |
John McCall | fc40028 | 2010-09-03 01:26:39 +0000 | [diff] [blame] | 135 | if (MD->isTrivial()) { |
| 136 | if (isa<CXXDestructorDecl>(MD)) return RValue::get(0); |
Francois Pichet | dbee341 | 2011-01-18 05:04:39 +0000 | [diff] [blame] | 137 | if (isa<CXXConstructorDecl>(MD) && |
| 138 | cast<CXXConstructorDecl>(MD)->isDefaultConstructor()) |
| 139 | return RValue::get(0); |
John McCall | fc40028 | 2010-09-03 01:26:39 +0000 | [diff] [blame] | 140 | |
Francois Pichet | dbee341 | 2011-01-18 05:04:39 +0000 | [diff] [blame] | 141 | if (MD->isCopyAssignmentOperator()) { |
| 142 | // We don't like to generate the trivial copy assignment operator when |
| 143 | // it isn't necessary; just produce the proper effect here. |
| 144 | llvm::Value *RHS = EmitLValue(*CE->arg_begin()).getAddress(); |
| 145 | EmitAggregateCopy(This, RHS, CE->getType()); |
| 146 | return RValue::get(This); |
| 147 | } |
| 148 | |
| 149 | if (isa<CXXConstructorDecl>(MD) && |
| 150 | cast<CXXConstructorDecl>(MD)->isCopyConstructor()) { |
| 151 | llvm::Value *RHS = EmitLValue(*CE->arg_begin()).getAddress(); |
| 152 | EmitSynthesizedCXXCopyCtorCall(cast<CXXConstructorDecl>(MD), This, RHS, |
| 153 | CE->arg_begin(), CE->arg_end()); |
| 154 | return RValue::get(This); |
| 155 | } |
| 156 | llvm_unreachable("unknown trivial member function"); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 157 | } |
| 158 | |
John McCall | fc40028 | 2010-09-03 01:26:39 +0000 | [diff] [blame] | 159 | // Compute the function type we're calling. |
Francois Pichet | dbee341 | 2011-01-18 05:04:39 +0000 | [diff] [blame] | 160 | const CGFunctionInfo *FInfo = 0; |
| 161 | if (isa<CXXDestructorDecl>(MD)) |
| 162 | FInfo = &CGM.getTypes().getFunctionInfo(cast<CXXDestructorDecl>(MD), |
| 163 | Dtor_Complete); |
| 164 | else if (isa<CXXConstructorDecl>(MD)) |
| 165 | FInfo = &CGM.getTypes().getFunctionInfo(cast<CXXConstructorDecl>(MD), |
| 166 | Ctor_Complete); |
| 167 | else |
| 168 | FInfo = &CGM.getTypes().getFunctionInfo(MD); |
John McCall | fc40028 | 2010-09-03 01:26:39 +0000 | [diff] [blame] | 169 | |
| 170 | const FunctionProtoType *FPT = MD->getType()->getAs<FunctionProtoType>(); |
| 171 | const llvm::Type *Ty |
Francois Pichet | dbee341 | 2011-01-18 05:04:39 +0000 | [diff] [blame] | 172 | = CGM.getTypes().GetFunctionType(*FInfo, FPT->isVariadic()); |
John McCall | fc40028 | 2010-09-03 01:26:39 +0000 | [diff] [blame] | 173 | |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 174 | // C++ [class.virtual]p12: |
| 175 | // Explicit qualification with the scope operator (5.1) suppresses the |
| 176 | // virtual call mechanism. |
| 177 | // |
| 178 | // We also don't emit a virtual call if the base expression has a record type |
| 179 | // because then we know what the type is. |
Fariborz Jahanian | 2726267 | 2011-01-20 17:19:02 +0000 | [diff] [blame] | 180 | bool UseVirtualCall; |
Fariborz Jahanian | 7ac0ff2 | 2011-01-21 01:04:41 +0000 | [diff] [blame] | 181 | UseVirtualCall = MD->isVirtual() && !ME->hasQualifier() |
| 182 | && !canDevirtualizeMemberFunctionCalls(getContext(), |
| 183 | ME->getBase(), MD); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 184 | llvm::Value *Callee; |
John McCall | fc40028 | 2010-09-03 01:26:39 +0000 | [diff] [blame] | 185 | if (const CXXDestructorDecl *Dtor = dyn_cast<CXXDestructorDecl>(MD)) { |
| 186 | if (UseVirtualCall) { |
| 187 | Callee = BuildVirtualCall(Dtor, Dtor_Complete, This, Ty); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 188 | } else { |
John McCall | fc40028 | 2010-09-03 01:26:39 +0000 | [diff] [blame] | 189 | Callee = CGM.GetAddrOfFunction(GlobalDecl(Dtor, Dtor_Complete), Ty); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 190 | } |
Francois Pichet | dbee341 | 2011-01-18 05:04:39 +0000 | [diff] [blame] | 191 | } else if (const CXXConstructorDecl *Ctor = |
| 192 | dyn_cast<CXXConstructorDecl>(MD)) { |
| 193 | Callee = CGM.GetAddrOfFunction(GlobalDecl(Ctor, Ctor_Complete), Ty); |
John McCall | fc40028 | 2010-09-03 01:26:39 +0000 | [diff] [blame] | 194 | } else if (UseVirtualCall) { |
Fariborz Jahanian | 2726267 | 2011-01-20 17:19:02 +0000 | [diff] [blame] | 195 | Callee = BuildVirtualCall(MD, This, Ty); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 196 | } else { |
Fariborz Jahanian | 7ac0ff2 | 2011-01-21 01:04:41 +0000 | [diff] [blame] | 197 | if (getContext().getLangOptions().AppleKext && |
| 198 | ME->hasQualifier()) |
| 199 | Callee = BuildAppleKextVirtualCall(MD, ME->getQualifier(), This, Ty); |
| 200 | else |
| 201 | Callee = CGM.GetAddrOfFunction(MD, Ty); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 202 | } |
| 203 | |
Anders Carlsson | c997d42 | 2010-01-02 01:01:18 +0000 | [diff] [blame] | 204 | return EmitCXXMemberCall(MD, Callee, ReturnValue, This, /*VTT=*/0, |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 205 | CE->arg_begin(), CE->arg_end()); |
| 206 | } |
| 207 | |
| 208 | RValue |
| 209 | CodeGenFunction::EmitCXXMemberPointerCallExpr(const CXXMemberCallExpr *E, |
| 210 | ReturnValueSlot ReturnValue) { |
| 211 | const BinaryOperator *BO = |
| 212 | cast<BinaryOperator>(E->getCallee()->IgnoreParens()); |
| 213 | const Expr *BaseExpr = BO->getLHS(); |
| 214 | const Expr *MemFnExpr = BO->getRHS(); |
| 215 | |
| 216 | const MemberPointerType *MPT = |
| 217 | MemFnExpr->getType()->getAs<MemberPointerType>(); |
John McCall | 93d557b | 2010-08-22 00:05:51 +0000 | [diff] [blame] | 218 | |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 219 | const FunctionProtoType *FPT = |
| 220 | MPT->getPointeeType()->getAs<FunctionProtoType>(); |
| 221 | const CXXRecordDecl *RD = |
| 222 | cast<CXXRecordDecl>(MPT->getClass()->getAs<RecordType>()->getDecl()); |
| 223 | |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 224 | // Get the member function pointer. |
John McCall | d608cdb | 2010-08-22 10:59:02 +0000 | [diff] [blame] | 225 | llvm::Value *MemFnPtr = EmitScalarExpr(MemFnExpr); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 226 | |
| 227 | // Emit the 'this' pointer. |
| 228 | llvm::Value *This; |
| 229 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 230 | if (BO->getOpcode() == BO_PtrMemI) |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 231 | This = EmitScalarExpr(BaseExpr); |
| 232 | else |
| 233 | This = EmitLValue(BaseExpr).getAddress(); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 234 | |
John McCall | 93d557b | 2010-08-22 00:05:51 +0000 | [diff] [blame] | 235 | // Ask the ABI to load the callee. Note that This is modified. |
| 236 | llvm::Value *Callee = |
| 237 | CGM.getCXXABI().EmitLoadOfMemberFunctionPointer(CGF, This, MemFnPtr, MPT); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 238 | |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 239 | CallArgList Args; |
| 240 | |
| 241 | QualType ThisType = |
| 242 | getContext().getPointerType(getContext().getTagDeclType(RD)); |
| 243 | |
| 244 | // Push the this ptr. |
| 245 | Args.push_back(std::make_pair(RValue::get(This), ThisType)); |
| 246 | |
| 247 | // And the rest of the call args |
| 248 | EmitCallArgs(Args, FPT, E->arg_begin(), E->arg_end()); |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 249 | const FunctionType *BO_FPT = BO->getType()->getAs<FunctionProtoType>(); |
| 250 | return EmitCall(CGM.getTypes().getFunctionInfo(Args, BO_FPT), Callee, |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 251 | ReturnValue, Args); |
| 252 | } |
| 253 | |
| 254 | RValue |
| 255 | CodeGenFunction::EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E, |
| 256 | const CXXMethodDecl *MD, |
| 257 | ReturnValueSlot ReturnValue) { |
| 258 | assert(MD->isInstance() && |
| 259 | "Trying to emit a member call expr on a static method!"); |
John McCall | 0e800c9 | 2010-12-04 08:14:53 +0000 | [diff] [blame] | 260 | LValue LV = EmitLValue(E->getArg(0)); |
| 261 | llvm::Value *This = LV.getAddress(); |
| 262 | |
Douglas Gregor | 3e9438b | 2010-09-27 22:37:28 +0000 | [diff] [blame] | 263 | if (MD->isCopyAssignmentOperator()) { |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 264 | const CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(MD->getDeclContext()); |
| 265 | if (ClassDecl->hasTrivialCopyAssignment()) { |
| 266 | assert(!ClassDecl->hasUserDeclaredCopyAssignment() && |
| 267 | "EmitCXXOperatorMemberCallExpr - user declared copy assignment"); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 268 | llvm::Value *Src = EmitLValue(E->getArg(1)).getAddress(); |
| 269 | QualType Ty = E->getType(); |
Fariborz Jahanian | 55bcace | 2010-06-15 22:44:06 +0000 | [diff] [blame] | 270 | EmitAggregateCopy(This, Src, Ty); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 271 | return RValue::get(This); |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | const FunctionProtoType *FPT = MD->getType()->getAs<FunctionProtoType>(); |
| 276 | const llvm::Type *Ty = |
| 277 | CGM.getTypes().GetFunctionType(CGM.getTypes().getFunctionInfo(MD), |
| 278 | FPT->isVariadic()); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 279 | llvm::Value *Callee; |
Fariborz Jahanian | 2726267 | 2011-01-20 17:19:02 +0000 | [diff] [blame] | 280 | if (MD->isVirtual() && |
Fariborz Jahanian | 7ac0ff2 | 2011-01-21 01:04:41 +0000 | [diff] [blame] | 281 | !canDevirtualizeMemberFunctionCalls(getContext(), |
| 282 | E->getArg(0), MD)) |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 283 | Callee = BuildVirtualCall(MD, This, Ty); |
| 284 | else |
| 285 | Callee = CGM.GetAddrOfFunction(MD, Ty); |
| 286 | |
Anders Carlsson | c997d42 | 2010-01-02 01:01:18 +0000 | [diff] [blame] | 287 | return EmitCXXMemberCall(MD, Callee, ReturnValue, This, /*VTT=*/0, |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 288 | E->arg_begin() + 1, E->arg_end()); |
| 289 | } |
| 290 | |
| 291 | void |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 292 | CodeGenFunction::EmitCXXConstructExpr(const CXXConstructExpr *E, |
| 293 | AggValueSlot Dest) { |
| 294 | assert(!Dest.isIgnored() && "Must have a destination!"); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 295 | const CXXConstructorDecl *CD = E->getConstructor(); |
Douglas Gregor | 759e41b | 2010-08-22 16:15:35 +0000 | [diff] [blame] | 296 | |
| 297 | // If we require zero initialization before (or instead of) calling the |
| 298 | // constructor, as can be the case with a non-user-provided default |
| 299 | // constructor, emit the zero initialization now. |
| 300 | if (E->requiresZeroInitialization()) |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 301 | EmitNullInitialization(Dest.getAddr(), E->getType()); |
Douglas Gregor | 759e41b | 2010-08-22 16:15:35 +0000 | [diff] [blame] | 302 | |
| 303 | // If this is a call to a trivial default constructor, do nothing. |
| 304 | if (CD->isTrivial() && CD->isDefaultConstructor()) |
| 305 | return; |
| 306 | |
John McCall | fc1e6c7 | 2010-09-18 00:58:34 +0000 | [diff] [blame] | 307 | // Elide the constructor if we're constructing from a temporary. |
| 308 | // The temporary check is required because Sema sets this on NRVO |
| 309 | // returns. |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 310 | if (getContext().getLangOptions().ElideConstructors && E->isElidable()) { |
John McCall | fc1e6c7 | 2010-09-18 00:58:34 +0000 | [diff] [blame] | 311 | assert(getContext().hasSameUnqualifiedType(E->getType(), |
| 312 | E->getArg(0)->getType())); |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 313 | if (E->getArg(0)->isTemporaryObject(getContext(), CD->getParent())) { |
| 314 | EmitAggExpr(E->getArg(0), Dest); |
Douglas Gregor | 3c9034c | 2010-05-15 00:13:29 +0000 | [diff] [blame] | 315 | return; |
| 316 | } |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 317 | } |
Douglas Gregor | 759e41b | 2010-08-22 16:15:35 +0000 | [diff] [blame] | 318 | |
| 319 | const ConstantArrayType *Array |
| 320 | = getContext().getAsConstantArrayType(E->getType()); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 321 | if (Array) { |
| 322 | QualType BaseElementTy = getContext().getBaseElementType(Array); |
| 323 | const llvm::Type *BasePtr = ConvertType(BaseElementTy); |
| 324 | BasePtr = llvm::PointerType::getUnqual(BasePtr); |
| 325 | llvm::Value *BaseAddrPtr = |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 326 | Builder.CreateBitCast(Dest.getAddr(), BasePtr); |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 327 | |
| 328 | EmitCXXAggrConstructorCall(CD, Array, BaseAddrPtr, |
| 329 | E->arg_begin(), E->arg_end()); |
| 330 | } |
Anders Carlsson | 155ed4a | 2010-05-02 23:20:53 +0000 | [diff] [blame] | 331 | else { |
| 332 | CXXCtorType Type = |
| 333 | (E->getConstructionKind() == CXXConstructExpr::CK_Complete) |
| 334 | ? Ctor_Complete : Ctor_Base; |
| 335 | bool ForVirtualBase = |
| 336 | E->getConstructionKind() == CXXConstructExpr::CK_VirtualBase; |
| 337 | |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 338 | // Call the constructor. |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 339 | EmitCXXConstructorCall(CD, Type, ForVirtualBase, Dest.getAddr(), |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 340 | E->arg_begin(), E->arg_end()); |
Anders Carlsson | 155ed4a | 2010-05-02 23:20:53 +0000 | [diff] [blame] | 341 | } |
Anders Carlsson | 3b5ad22 | 2010-01-01 20:29:01 +0000 | [diff] [blame] | 342 | } |
| 343 | |
Fariborz Jahanian | 3499987 | 2010-11-13 21:53:34 +0000 | [diff] [blame] | 344 | void |
| 345 | CodeGenFunction::EmitSynthesizedCXXCopyCtor(llvm::Value *Dest, |
| 346 | llvm::Value *Src, |
Fariborz Jahanian | 830937b | 2010-12-02 17:02:11 +0000 | [diff] [blame] | 347 | const Expr *Exp) { |
John McCall | 4765fa0 | 2010-12-06 08:20:24 +0000 | [diff] [blame] | 348 | if (const ExprWithCleanups *E = dyn_cast<ExprWithCleanups>(Exp)) |
Fariborz Jahanian | 3499987 | 2010-11-13 21:53:34 +0000 | [diff] [blame] | 349 | Exp = E->getSubExpr(); |
| 350 | assert(isa<CXXConstructExpr>(Exp) && |
| 351 | "EmitSynthesizedCXXCopyCtor - unknown copy ctor expr"); |
| 352 | const CXXConstructExpr* E = cast<CXXConstructExpr>(Exp); |
| 353 | const CXXConstructorDecl *CD = E->getConstructor(); |
| 354 | RunCleanupsScope Scope(*this); |
| 355 | |
| 356 | // If we require zero initialization before (or instead of) calling the |
| 357 | // constructor, as can be the case with a non-user-provided default |
| 358 | // constructor, emit the zero initialization now. |
| 359 | // FIXME. Do I still need this for a copy ctor synthesis? |
| 360 | if (E->requiresZeroInitialization()) |
| 361 | EmitNullInitialization(Dest, E->getType()); |
| 362 | |
Chandler Carruth | 858a546 | 2010-11-15 13:54:43 +0000 | [diff] [blame] | 363 | assert(!getContext().getAsConstantArrayType(E->getType()) |
| 364 | && "EmitSynthesizedCXXCopyCtor - Copied-in Array"); |
Fariborz Jahanian | 3499987 | 2010-11-13 21:53:34 +0000 | [diff] [blame] | 365 | EmitSynthesizedCXXCopyCtorCall(CD, Dest, Src, |
| 366 | E->arg_begin(), E->arg_end()); |
| 367 | } |
| 368 | |
John McCall | 5172ed9 | 2010-08-23 01:17:59 +0000 | [diff] [blame] | 369 | /// Check whether the given operator new[] is the global placement |
| 370 | /// operator new[]. |
| 371 | static bool IsPlacementOperatorNewArray(ASTContext &Ctx, |
| 372 | const FunctionDecl *Fn) { |
| 373 | // Must be in global scope. Note that allocation functions can't be |
| 374 | // declared in namespaces. |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 375 | if (!Fn->getDeclContext()->getRedeclContext()->isFileContext()) |
John McCall | 5172ed9 | 2010-08-23 01:17:59 +0000 | [diff] [blame] | 376 | return false; |
| 377 | |
| 378 | // Signature must be void *operator new[](size_t, void*). |
| 379 | // The size_t is common to all operator new[]s. |
| 380 | if (Fn->getNumParams() != 2) |
| 381 | return false; |
| 382 | |
| 383 | CanQualType ParamType = Ctx.getCanonicalType(Fn->getParamDecl(1)->getType()); |
| 384 | return (ParamType == Ctx.VoidPtrTy); |
| 385 | } |
| 386 | |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 387 | static CharUnits CalculateCookiePadding(CodeGenFunction &CGF, |
| 388 | const CXXNewExpr *E) { |
Anders Carlsson | 871d078 | 2009-12-13 20:04:38 +0000 | [diff] [blame] | 389 | if (!E->isArray()) |
Ken Dyck | caf647c | 2010-01-26 19:44:24 +0000 | [diff] [blame] | 390 | return CharUnits::Zero(); |
Anders Carlsson | 871d078 | 2009-12-13 20:04:38 +0000 | [diff] [blame] | 391 | |
Anders Carlsson | dd93755 | 2009-12-13 20:34:34 +0000 | [diff] [blame] | 392 | // No cookie is required if the new operator being used is |
| 393 | // ::operator new[](size_t, void*). |
| 394 | const FunctionDecl *OperatorNew = E->getOperatorNew(); |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 395 | if (IsPlacementOperatorNewArray(CGF.getContext(), OperatorNew)) |
John McCall | 5172ed9 | 2010-08-23 01:17:59 +0000 | [diff] [blame] | 396 | return CharUnits::Zero(); |
| 397 | |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 398 | return CGF.CGM.getCXXABI().GetArrayCookieSize(E->getAllocatedType()); |
Anders Carlsson | a4d4c01 | 2009-09-23 16:07:23 +0000 | [diff] [blame] | 399 | } |
| 400 | |
Fariborz Jahanian | ceb43b6 | 2010-03-24 16:57:01 +0000 | [diff] [blame] | 401 | static llvm::Value *EmitCXXNewAllocSize(ASTContext &Context, |
Chris Lattner | defe8b2 | 2010-07-20 18:45:57 +0000 | [diff] [blame] | 402 | CodeGenFunction &CGF, |
Anders Carlsson | a4d4c01 | 2009-09-23 16:07:23 +0000 | [diff] [blame] | 403 | const CXXNewExpr *E, |
Douglas Gregor | 59174c0 | 2010-07-21 01:10:17 +0000 | [diff] [blame] | 404 | llvm::Value *&NumElements, |
| 405 | llvm::Value *&SizeWithoutCookie) { |
Argyrios Kyrtzidis | e7ab92e | 2010-08-26 15:23:38 +0000 | [diff] [blame] | 406 | QualType ElemType = E->getAllocatedType(); |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 407 | |
| 408 | const llvm::IntegerType *SizeTy = |
| 409 | cast<llvm::IntegerType>(CGF.ConvertType(CGF.getContext().getSizeType())); |
Anders Carlsson | a4d4c01 | 2009-09-23 16:07:23 +0000 | [diff] [blame] | 410 | |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 411 | CharUnits TypeSize = CGF.getContext().getTypeSizeInChars(ElemType); |
| 412 | |
Douglas Gregor | 59174c0 | 2010-07-21 01:10:17 +0000 | [diff] [blame] | 413 | if (!E->isArray()) { |
| 414 | SizeWithoutCookie = llvm::ConstantInt::get(SizeTy, TypeSize.getQuantity()); |
| 415 | return SizeWithoutCookie; |
| 416 | } |
Anders Carlsson | a4d4c01 | 2009-09-23 16:07:23 +0000 | [diff] [blame] | 417 | |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 418 | // Figure out the cookie size. |
| 419 | CharUnits CookieSize = CalculateCookiePadding(CGF, E); |
| 420 | |
Anders Carlsson | a4d4c01 | 2009-09-23 16:07:23 +0000 | [diff] [blame] | 421 | // Emit the array size expression. |
Argyrios Kyrtzidis | e7ab92e | 2010-08-26 15:23:38 +0000 | [diff] [blame] | 422 | // We multiply the size of all dimensions for NumElements. |
| 423 | // e.g for 'int[2][3]', ElemType is 'int' and NumElements is 6. |
Anders Carlsson | a4d4c01 | 2009-09-23 16:07:23 +0000 | [diff] [blame] | 424 | NumElements = CGF.EmitScalarExpr(E->getArraySize()); |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 425 | assert(NumElements->getType() == SizeTy && "element count not a size_t"); |
| 426 | |
| 427 | uint64_t ArraySizeMultiplier = 1; |
Argyrios Kyrtzidis | e7ab92e | 2010-08-26 15:23:38 +0000 | [diff] [blame] | 428 | while (const ConstantArrayType *CAT |
| 429 | = CGF.getContext().getAsConstantArrayType(ElemType)) { |
| 430 | ElemType = CAT->getElementType(); |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 431 | ArraySizeMultiplier *= CAT->getSize().getZExtValue(); |
Argyrios Kyrtzidis | e7ab92e | 2010-08-26 15:23:38 +0000 | [diff] [blame] | 432 | } |
| 433 | |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 434 | llvm::Value *Size; |
Chris Lattner | 83252dc | 2010-07-20 21:07:09 +0000 | [diff] [blame] | 435 | |
Chris Lattner | 806941e | 2010-07-20 21:55:52 +0000 | [diff] [blame] | 436 | // If someone is doing 'new int[42]' there is no need to do a dynamic check. |
| 437 | // Don't bloat the -O0 code. |
| 438 | if (llvm::ConstantInt *NumElementsC = |
| 439 | dyn_cast<llvm::ConstantInt>(NumElements)) { |
Chris Lattner | 806941e | 2010-07-20 21:55:52 +0000 | [diff] [blame] | 440 | llvm::APInt NEC = NumElementsC->getValue(); |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 441 | unsigned SizeWidth = NEC.getBitWidth(); |
| 442 | |
| 443 | // Determine if there is an overflow here by doing an extended multiply. |
Jay Foad | 9f71a8f | 2010-12-07 08:25:34 +0000 | [diff] [blame] | 444 | NEC = NEC.zext(SizeWidth*2); |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 445 | llvm::APInt SC(SizeWidth*2, TypeSize.getQuantity()); |
Chris Lattner | 806941e | 2010-07-20 21:55:52 +0000 | [diff] [blame] | 446 | SC *= NEC; |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 447 | |
| 448 | if (!CookieSize.isZero()) { |
| 449 | // Save the current size without a cookie. We don't care if an |
| 450 | // overflow's already happened because SizeWithoutCookie isn't |
| 451 | // used if the allocator returns null or throws, as it should |
| 452 | // always do on an overflow. |
Jay Foad | 9f71a8f | 2010-12-07 08:25:34 +0000 | [diff] [blame] | 453 | llvm::APInt SWC = SC.trunc(SizeWidth); |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 454 | SizeWithoutCookie = llvm::ConstantInt::get(SizeTy, SWC); |
| 455 | |
| 456 | // Add the cookie size. |
| 457 | SC += llvm::APInt(SizeWidth*2, CookieSize.getQuantity()); |
Chris Lattner | 806941e | 2010-07-20 21:55:52 +0000 | [diff] [blame] | 458 | } |
| 459 | |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 460 | if (SC.countLeadingZeros() >= SizeWidth) { |
Jay Foad | 9f71a8f | 2010-12-07 08:25:34 +0000 | [diff] [blame] | 461 | SC = SC.trunc(SizeWidth); |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 462 | Size = llvm::ConstantInt::get(SizeTy, SC); |
| 463 | } else { |
| 464 | // On overflow, produce a -1 so operator new throws. |
| 465 | Size = llvm::Constant::getAllOnesValue(SizeTy); |
| 466 | } |
Anders Carlsson | a4d4c01 | 2009-09-23 16:07:23 +0000 | [diff] [blame] | 467 | |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 468 | // Scale NumElements while we're at it. |
| 469 | uint64_t N = NEC.getZExtValue() * ArraySizeMultiplier; |
| 470 | NumElements = llvm::ConstantInt::get(SizeTy, N); |
| 471 | |
| 472 | // Otherwise, we don't need to do an overflow-checked multiplication if |
| 473 | // we're multiplying by one. |
| 474 | } else if (TypeSize.isOne()) { |
| 475 | assert(ArraySizeMultiplier == 1); |
| 476 | |
| 477 | Size = NumElements; |
| 478 | |
| 479 | // If we need a cookie, add its size in with an overflow check. |
| 480 | // This is maybe a little paranoid. |
| 481 | if (!CookieSize.isZero()) { |
| 482 | SizeWithoutCookie = Size; |
| 483 | |
| 484 | llvm::Value *CookieSizeV |
| 485 | = llvm::ConstantInt::get(SizeTy, CookieSize.getQuantity()); |
| 486 | |
| 487 | const llvm::Type *Types[] = { SizeTy }; |
| 488 | llvm::Value *UAddF |
| 489 | = CGF.CGM.getIntrinsic(llvm::Intrinsic::uadd_with_overflow, Types, 1); |
| 490 | llvm::Value *AddRes |
| 491 | = CGF.Builder.CreateCall2(UAddF, Size, CookieSizeV); |
| 492 | |
| 493 | Size = CGF.Builder.CreateExtractValue(AddRes, 0); |
| 494 | llvm::Value *DidOverflow = CGF.Builder.CreateExtractValue(AddRes, 1); |
| 495 | Size = CGF.Builder.CreateSelect(DidOverflow, |
| 496 | llvm::ConstantInt::get(SizeTy, -1), |
| 497 | Size); |
| 498 | } |
| 499 | |
| 500 | // Otherwise use the int.umul.with.overflow intrinsic. |
| 501 | } else { |
| 502 | llvm::Value *OutermostElementSize |
| 503 | = llvm::ConstantInt::get(SizeTy, TypeSize.getQuantity()); |
| 504 | |
| 505 | llvm::Value *NumOutermostElements = NumElements; |
| 506 | |
| 507 | // Scale NumElements by the array size multiplier. This might |
| 508 | // overflow, but only if the multiplication below also overflows, |
| 509 | // in which case this multiplication isn't used. |
| 510 | if (ArraySizeMultiplier != 1) |
| 511 | NumElements = CGF.Builder.CreateMul(NumElements, |
| 512 | llvm::ConstantInt::get(SizeTy, ArraySizeMultiplier)); |
| 513 | |
| 514 | // The requested size of the outermost array is non-constant. |
| 515 | // Multiply that by the static size of the elements of that array; |
| 516 | // on unsigned overflow, set the size to -1 to trigger an |
| 517 | // exception from the allocation routine. This is sufficient to |
| 518 | // prevent buffer overruns from the allocator returning a |
| 519 | // seemingly valid pointer to insufficient space. This idea comes |
| 520 | // originally from MSVC, and GCC has an open bug requesting |
| 521 | // similar behavior: |
| 522 | // http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19351 |
| 523 | // |
| 524 | // This will not be sufficient for C++0x, which requires a |
| 525 | // specific exception class (std::bad_array_new_length). |
| 526 | // That will require ABI support that has not yet been specified. |
| 527 | const llvm::Type *Types[] = { SizeTy }; |
| 528 | llvm::Value *UMulF |
| 529 | = CGF.CGM.getIntrinsic(llvm::Intrinsic::umul_with_overflow, Types, 1); |
| 530 | llvm::Value *MulRes = CGF.Builder.CreateCall2(UMulF, NumOutermostElements, |
| 531 | OutermostElementSize); |
| 532 | |
| 533 | // The overflow bit. |
| 534 | llvm::Value *DidOverflow = CGF.Builder.CreateExtractValue(MulRes, 1); |
| 535 | |
| 536 | // The result of the multiplication. |
| 537 | Size = CGF.Builder.CreateExtractValue(MulRes, 0); |
| 538 | |
| 539 | // If we have a cookie, we need to add that size in, too. |
| 540 | if (!CookieSize.isZero()) { |
| 541 | SizeWithoutCookie = Size; |
| 542 | |
| 543 | llvm::Value *CookieSizeV |
| 544 | = llvm::ConstantInt::get(SizeTy, CookieSize.getQuantity()); |
| 545 | llvm::Value *UAddF |
| 546 | = CGF.CGM.getIntrinsic(llvm::Intrinsic::uadd_with_overflow, Types, 1); |
| 547 | llvm::Value *AddRes |
| 548 | = CGF.Builder.CreateCall2(UAddF, SizeWithoutCookie, CookieSizeV); |
| 549 | |
| 550 | Size = CGF.Builder.CreateExtractValue(AddRes, 0); |
| 551 | |
| 552 | llvm::Value *AddDidOverflow = CGF.Builder.CreateExtractValue(AddRes, 1); |
| 553 | DidOverflow = CGF.Builder.CreateAnd(DidOverflow, AddDidOverflow); |
| 554 | } |
| 555 | |
| 556 | Size = CGF.Builder.CreateSelect(DidOverflow, |
| 557 | llvm::ConstantInt::get(SizeTy, -1), |
| 558 | Size); |
Chris Lattner | 806941e | 2010-07-20 21:55:52 +0000 | [diff] [blame] | 559 | } |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 560 | |
| 561 | if (CookieSize.isZero()) |
| 562 | SizeWithoutCookie = Size; |
| 563 | else |
| 564 | assert(SizeWithoutCookie && "didn't set SizeWithoutCookie?"); |
| 565 | |
Chris Lattner | 806941e | 2010-07-20 21:55:52 +0000 | [diff] [blame] | 566 | return Size; |
Anders Carlsson | a4d4c01 | 2009-09-23 16:07:23 +0000 | [diff] [blame] | 567 | } |
| 568 | |
Fariborz Jahanian | ef66872 | 2010-06-25 18:26:07 +0000 | [diff] [blame] | 569 | static void StoreAnyExprIntoOneUnit(CodeGenFunction &CGF, const CXXNewExpr *E, |
| 570 | llvm::Value *NewPtr) { |
Fariborz Jahanian | ef66872 | 2010-06-25 18:26:07 +0000 | [diff] [blame] | 571 | |
| 572 | assert(E->getNumConstructorArgs() == 1 && |
| 573 | "Can only have one argument to initializer of POD type."); |
| 574 | |
| 575 | const Expr *Init = E->getConstructorArg(0); |
| 576 | QualType AllocType = E->getAllocatedType(); |
Daniel Dunbar | 91a16fa | 2010-08-21 02:24:36 +0000 | [diff] [blame] | 577 | |
| 578 | unsigned Alignment = |
| 579 | CGF.getContext().getTypeAlignInChars(AllocType).getQuantity(); |
Fariborz Jahanian | ef66872 | 2010-06-25 18:26:07 +0000 | [diff] [blame] | 580 | if (!CGF.hasAggregateLLVMType(AllocType)) |
| 581 | CGF.EmitStoreOfScalar(CGF.EmitScalarExpr(Init), NewPtr, |
Daniel Dunbar | 91a16fa | 2010-08-21 02:24:36 +0000 | [diff] [blame] | 582 | AllocType.isVolatileQualified(), Alignment, |
| 583 | AllocType); |
Fariborz Jahanian | ef66872 | 2010-06-25 18:26:07 +0000 | [diff] [blame] | 584 | else if (AllocType->isAnyComplexType()) |
| 585 | CGF.EmitComplexExprIntoAddr(Init, NewPtr, |
| 586 | AllocType.isVolatileQualified()); |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 587 | else { |
| 588 | AggValueSlot Slot |
| 589 | = AggValueSlot::forAddr(NewPtr, AllocType.isVolatileQualified(), true); |
| 590 | CGF.EmitAggExpr(Init, Slot); |
| 591 | } |
Fariborz Jahanian | ef66872 | 2010-06-25 18:26:07 +0000 | [diff] [blame] | 592 | } |
| 593 | |
| 594 | void |
| 595 | CodeGenFunction::EmitNewArrayInitializer(const CXXNewExpr *E, |
| 596 | llvm::Value *NewPtr, |
| 597 | llvm::Value *NumElements) { |
Fariborz Jahanian | 5304c95 | 2010-06-25 20:01:13 +0000 | [diff] [blame] | 598 | // We have a POD type. |
| 599 | if (E->getNumConstructorArgs() == 0) |
| 600 | return; |
| 601 | |
Fariborz Jahanian | ef66872 | 2010-06-25 18:26:07 +0000 | [diff] [blame] | 602 | const llvm::Type *SizeTy = ConvertType(getContext().getSizeType()); |
| 603 | |
| 604 | // Create a temporary for the loop index and initialize it with 0. |
| 605 | llvm::Value *IndexPtr = CreateTempAlloca(SizeTy, "loop.index"); |
| 606 | llvm::Value *Zero = llvm::Constant::getNullValue(SizeTy); |
| 607 | Builder.CreateStore(Zero, IndexPtr); |
| 608 | |
| 609 | // Start the loop with a block that tests the condition. |
| 610 | llvm::BasicBlock *CondBlock = createBasicBlock("for.cond"); |
| 611 | llvm::BasicBlock *AfterFor = createBasicBlock("for.end"); |
| 612 | |
| 613 | EmitBlock(CondBlock); |
| 614 | |
| 615 | llvm::BasicBlock *ForBody = createBasicBlock("for.body"); |
| 616 | |
| 617 | // Generate: if (loop-index < number-of-elements fall to the loop body, |
| 618 | // otherwise, go to the block after the for-loop. |
| 619 | llvm::Value *Counter = Builder.CreateLoad(IndexPtr); |
| 620 | llvm::Value *IsLess = Builder.CreateICmpULT(Counter, NumElements, "isless"); |
| 621 | // If the condition is true, execute the body. |
| 622 | Builder.CreateCondBr(IsLess, ForBody, AfterFor); |
| 623 | |
| 624 | EmitBlock(ForBody); |
| 625 | |
| 626 | llvm::BasicBlock *ContinueBlock = createBasicBlock("for.inc"); |
| 627 | // Inside the loop body, emit the constructor call on the array element. |
| 628 | Counter = Builder.CreateLoad(IndexPtr); |
| 629 | llvm::Value *Address = Builder.CreateInBoundsGEP(NewPtr, Counter, |
| 630 | "arrayidx"); |
| 631 | StoreAnyExprIntoOneUnit(*this, E, Address); |
| 632 | |
| 633 | EmitBlock(ContinueBlock); |
| 634 | |
| 635 | // Emit the increment of the loop counter. |
| 636 | llvm::Value *NextVal = llvm::ConstantInt::get(SizeTy, 1); |
| 637 | Counter = Builder.CreateLoad(IndexPtr); |
| 638 | NextVal = Builder.CreateAdd(Counter, NextVal, "inc"); |
| 639 | Builder.CreateStore(NextVal, IndexPtr); |
| 640 | |
| 641 | // Finally, branch back up to the condition for the next iteration. |
| 642 | EmitBranch(CondBlock); |
| 643 | |
| 644 | // Emit the fall-through block. |
| 645 | EmitBlock(AfterFor, true); |
| 646 | } |
| 647 | |
Douglas Gregor | 59174c0 | 2010-07-21 01:10:17 +0000 | [diff] [blame] | 648 | static void EmitZeroMemSet(CodeGenFunction &CGF, QualType T, |
| 649 | llvm::Value *NewPtr, llvm::Value *Size) { |
| 650 | llvm::LLVMContext &VMContext = CGF.CGM.getLLVMContext(); |
| 651 | const llvm::Type *BP = llvm::Type::getInt8PtrTy(VMContext); |
| 652 | if (NewPtr->getType() != BP) |
| 653 | NewPtr = CGF.Builder.CreateBitCast(NewPtr, BP, "tmp"); |
Benjamin Kramer | 9f0c7cc | 2010-12-30 00:13:21 +0000 | [diff] [blame] | 654 | |
Ken Dyck | fe71008 | 2011-01-19 01:58:38 +0000 | [diff] [blame] | 655 | CharUnits Alignment = CGF.getContext().getTypeAlignInChars(T); |
Benjamin Kramer | 9f0c7cc | 2010-12-30 00:13:21 +0000 | [diff] [blame] | 656 | CGF.Builder.CreateMemSet(NewPtr, CGF.Builder.getInt8(0), Size, |
Ken Dyck | fe71008 | 2011-01-19 01:58:38 +0000 | [diff] [blame] | 657 | Alignment.getQuantity(), false); |
Douglas Gregor | 59174c0 | 2010-07-21 01:10:17 +0000 | [diff] [blame] | 658 | } |
| 659 | |
Anders Carlsson | a4d4c01 | 2009-09-23 16:07:23 +0000 | [diff] [blame] | 660 | static void EmitNewInitializer(CodeGenFunction &CGF, const CXXNewExpr *E, |
| 661 | llvm::Value *NewPtr, |
Douglas Gregor | 59174c0 | 2010-07-21 01:10:17 +0000 | [diff] [blame] | 662 | llvm::Value *NumElements, |
| 663 | llvm::Value *AllocSizeWithoutCookie) { |
Anders Carlsson | 5d4d946 | 2009-11-24 18:43:52 +0000 | [diff] [blame] | 664 | if (E->isArray()) { |
Anders Carlsson | e99bdb6 | 2010-05-03 15:09:17 +0000 | [diff] [blame] | 665 | if (CXXConstructorDecl *Ctor = E->getConstructor()) { |
Douglas Gregor | 59174c0 | 2010-07-21 01:10:17 +0000 | [diff] [blame] | 666 | bool RequiresZeroInitialization = false; |
| 667 | if (Ctor->getParent()->hasTrivialConstructor()) { |
| 668 | // If new expression did not specify value-initialization, then there |
| 669 | // is no initialization. |
| 670 | if (!E->hasInitializer() || Ctor->getParent()->isEmpty()) |
| 671 | return; |
| 672 | |
John McCall | f16aa10 | 2010-08-22 21:01:12 +0000 | [diff] [blame] | 673 | if (CGF.CGM.getTypes().isZeroInitializable(E->getAllocatedType())) { |
Douglas Gregor | 59174c0 | 2010-07-21 01:10:17 +0000 | [diff] [blame] | 674 | // Optimization: since zero initialization will just set the memory |
| 675 | // to all zeroes, generate a single memset to do it in one shot. |
| 676 | EmitZeroMemSet(CGF, E->getAllocatedType(), NewPtr, |
| 677 | AllocSizeWithoutCookie); |
| 678 | return; |
| 679 | } |
| 680 | |
| 681 | RequiresZeroInitialization = true; |
| 682 | } |
| 683 | |
| 684 | CGF.EmitCXXAggrConstructorCall(Ctor, NumElements, NewPtr, |
| 685 | E->constructor_arg_begin(), |
| 686 | E->constructor_arg_end(), |
| 687 | RequiresZeroInitialization); |
Anders Carlsson | e99bdb6 | 2010-05-03 15:09:17 +0000 | [diff] [blame] | 688 | return; |
Douglas Gregor | 59174c0 | 2010-07-21 01:10:17 +0000 | [diff] [blame] | 689 | } else if (E->getNumConstructorArgs() == 1 && |
| 690 | isa<ImplicitValueInitExpr>(E->getConstructorArg(0))) { |
| 691 | // Optimization: since zero initialization will just set the memory |
| 692 | // to all zeroes, generate a single memset to do it in one shot. |
| 693 | EmitZeroMemSet(CGF, E->getAllocatedType(), NewPtr, |
| 694 | AllocSizeWithoutCookie); |
| 695 | return; |
| 696 | } else { |
Fariborz Jahanian | ef66872 | 2010-06-25 18:26:07 +0000 | [diff] [blame] | 697 | CGF.EmitNewArrayInitializer(E, NewPtr, NumElements); |
| 698 | return; |
| 699 | } |
Anders Carlsson | a4d4c01 | 2009-09-23 16:07:23 +0000 | [diff] [blame] | 700 | } |
Anders Carlsson | 5d4d946 | 2009-11-24 18:43:52 +0000 | [diff] [blame] | 701 | |
| 702 | if (CXXConstructorDecl *Ctor = E->getConstructor()) { |
Douglas Gregor | ed8abf1 | 2010-07-08 06:14:04 +0000 | [diff] [blame] | 703 | // Per C++ [expr.new]p15, if we have an initializer, then we're performing |
| 704 | // direct initialization. C++ [dcl.init]p5 requires that we |
| 705 | // zero-initialize storage if there are no user-declared constructors. |
| 706 | if (E->hasInitializer() && |
| 707 | !Ctor->getParent()->hasUserDeclaredConstructor() && |
| 708 | !Ctor->getParent()->isEmpty()) |
| 709 | CGF.EmitNullInitialization(NewPtr, E->getAllocatedType()); |
| 710 | |
Douglas Gregor | 8474567 | 2010-07-07 23:37:33 +0000 | [diff] [blame] | 711 | CGF.EmitCXXConstructorCall(Ctor, Ctor_Complete, /*ForVirtualBase=*/false, |
| 712 | NewPtr, E->constructor_arg_begin(), |
| 713 | E->constructor_arg_end()); |
Anders Carlsson | 5d4d946 | 2009-11-24 18:43:52 +0000 | [diff] [blame] | 714 | |
| 715 | return; |
| 716 | } |
Fariborz Jahanian | 5304c95 | 2010-06-25 20:01:13 +0000 | [diff] [blame] | 717 | // We have a POD type. |
| 718 | if (E->getNumConstructorArgs() == 0) |
| 719 | return; |
| 720 | |
Fariborz Jahanian | ef66872 | 2010-06-25 18:26:07 +0000 | [diff] [blame] | 721 | StoreAnyExprIntoOneUnit(CGF, E, NewPtr); |
Anders Carlsson | a4d4c01 | 2009-09-23 16:07:23 +0000 | [diff] [blame] | 722 | } |
| 723 | |
Benjamin Kramer | 79ba2a6 | 2010-10-22 16:48:22 +0000 | [diff] [blame] | 724 | namespace { |
John McCall | 3019c44 | 2010-09-17 00:50:28 +0000 | [diff] [blame] | 725 | /// A utility class for saving an rvalue. |
| 726 | class SavedRValue { |
| 727 | public: |
| 728 | enum Kind { ScalarLiteral, ScalarAddress, |
| 729 | AggregateLiteral, AggregateAddress, |
| 730 | Complex }; |
| 731 | |
| 732 | private: |
| 733 | llvm::Value *Value; |
| 734 | Kind K; |
| 735 | |
| 736 | SavedRValue(llvm::Value *V, Kind K) : Value(V), K(K) {} |
| 737 | |
| 738 | public: |
| 739 | SavedRValue() {} |
| 740 | |
| 741 | static SavedRValue forScalarLiteral(llvm::Value *V) { |
| 742 | return SavedRValue(V, ScalarLiteral); |
| 743 | } |
| 744 | |
| 745 | static SavedRValue forScalarAddress(llvm::Value *Addr) { |
| 746 | return SavedRValue(Addr, ScalarAddress); |
| 747 | } |
| 748 | |
| 749 | static SavedRValue forAggregateLiteral(llvm::Value *V) { |
| 750 | return SavedRValue(V, AggregateLiteral); |
| 751 | } |
| 752 | |
| 753 | static SavedRValue forAggregateAddress(llvm::Value *Addr) { |
| 754 | return SavedRValue(Addr, AggregateAddress); |
| 755 | } |
| 756 | |
| 757 | static SavedRValue forComplexAddress(llvm::Value *Addr) { |
| 758 | return SavedRValue(Addr, Complex); |
| 759 | } |
| 760 | |
| 761 | Kind getKind() const { return K; } |
| 762 | llvm::Value *getValue() const { return Value; } |
| 763 | }; |
Benjamin Kramer | 79ba2a6 | 2010-10-22 16:48:22 +0000 | [diff] [blame] | 764 | } // end anonymous namespace |
John McCall | 3019c44 | 2010-09-17 00:50:28 +0000 | [diff] [blame] | 765 | |
| 766 | /// Given an r-value, perform the code necessary to make sure that a |
| 767 | /// future RestoreRValue will be able to load the value without |
| 768 | /// domination concerns. |
| 769 | static SavedRValue SaveRValue(CodeGenFunction &CGF, RValue RV) { |
| 770 | if (RV.isScalar()) { |
| 771 | llvm::Value *V = RV.getScalarVal(); |
| 772 | |
| 773 | // These automatically dominate and don't need to be saved. |
| 774 | if (isa<llvm::Constant>(V) || isa<llvm::AllocaInst>(V)) |
| 775 | return SavedRValue::forScalarLiteral(V); |
| 776 | |
| 777 | // Everything else needs an alloca. |
| 778 | llvm::Value *Addr = CGF.CreateTempAlloca(V->getType(), "saved-rvalue"); |
| 779 | CGF.Builder.CreateStore(V, Addr); |
| 780 | return SavedRValue::forScalarAddress(Addr); |
| 781 | } |
| 782 | |
| 783 | if (RV.isComplex()) { |
| 784 | CodeGenFunction::ComplexPairTy V = RV.getComplexVal(); |
| 785 | const llvm::Type *ComplexTy = |
| 786 | llvm::StructType::get(CGF.getLLVMContext(), |
| 787 | V.first->getType(), V.second->getType(), |
| 788 | (void*) 0); |
| 789 | llvm::Value *Addr = CGF.CreateTempAlloca(ComplexTy, "saved-complex"); |
| 790 | CGF.StoreComplexToAddr(V, Addr, /*volatile*/ false); |
| 791 | return SavedRValue::forComplexAddress(Addr); |
| 792 | } |
| 793 | |
| 794 | assert(RV.isAggregate()); |
| 795 | llvm::Value *V = RV.getAggregateAddr(); // TODO: volatile? |
| 796 | if (isa<llvm::Constant>(V) || isa<llvm::AllocaInst>(V)) |
| 797 | return SavedRValue::forAggregateLiteral(V); |
| 798 | |
| 799 | llvm::Value *Addr = CGF.CreateTempAlloca(V->getType(), "saved-rvalue"); |
| 800 | CGF.Builder.CreateStore(V, Addr); |
| 801 | return SavedRValue::forAggregateAddress(Addr); |
| 802 | } |
| 803 | |
| 804 | /// Given a saved r-value produced by SaveRValue, perform the code |
| 805 | /// necessary to restore it to usability at the current insertion |
| 806 | /// point. |
| 807 | static RValue RestoreRValue(CodeGenFunction &CGF, SavedRValue RV) { |
| 808 | switch (RV.getKind()) { |
| 809 | case SavedRValue::ScalarLiteral: |
| 810 | return RValue::get(RV.getValue()); |
| 811 | case SavedRValue::ScalarAddress: |
| 812 | return RValue::get(CGF.Builder.CreateLoad(RV.getValue())); |
| 813 | case SavedRValue::AggregateLiteral: |
| 814 | return RValue::getAggregate(RV.getValue()); |
| 815 | case SavedRValue::AggregateAddress: |
| 816 | return RValue::getAggregate(CGF.Builder.CreateLoad(RV.getValue())); |
| 817 | case SavedRValue::Complex: |
| 818 | return RValue::getComplex(CGF.LoadComplexFromAddr(RV.getValue(), false)); |
| 819 | } |
| 820 | |
| 821 | llvm_unreachable("bad saved r-value kind"); |
| 822 | return RValue(); |
| 823 | } |
| 824 | |
John McCall | 7d8647f | 2010-09-14 07:57:04 +0000 | [diff] [blame] | 825 | namespace { |
| 826 | /// A cleanup to call the given 'operator delete' function upon |
| 827 | /// abnormal exit from a new expression. |
| 828 | class CallDeleteDuringNew : public EHScopeStack::Cleanup { |
| 829 | size_t NumPlacementArgs; |
| 830 | const FunctionDecl *OperatorDelete; |
| 831 | llvm::Value *Ptr; |
| 832 | llvm::Value *AllocSize; |
| 833 | |
| 834 | RValue *getPlacementArgs() { return reinterpret_cast<RValue*>(this+1); } |
| 835 | |
| 836 | public: |
| 837 | static size_t getExtraSize(size_t NumPlacementArgs) { |
| 838 | return NumPlacementArgs * sizeof(RValue); |
| 839 | } |
| 840 | |
| 841 | CallDeleteDuringNew(size_t NumPlacementArgs, |
| 842 | const FunctionDecl *OperatorDelete, |
| 843 | llvm::Value *Ptr, |
| 844 | llvm::Value *AllocSize) |
| 845 | : NumPlacementArgs(NumPlacementArgs), OperatorDelete(OperatorDelete), |
| 846 | Ptr(Ptr), AllocSize(AllocSize) {} |
| 847 | |
| 848 | void setPlacementArg(unsigned I, RValue Arg) { |
| 849 | assert(I < NumPlacementArgs && "index out of range"); |
| 850 | getPlacementArgs()[I] = Arg; |
| 851 | } |
| 852 | |
| 853 | void Emit(CodeGenFunction &CGF, bool IsForEH) { |
| 854 | const FunctionProtoType *FPT |
| 855 | = OperatorDelete->getType()->getAs<FunctionProtoType>(); |
| 856 | assert(FPT->getNumArgs() == NumPlacementArgs + 1 || |
John McCall | c384636 | 2010-09-14 21:45:42 +0000 | [diff] [blame] | 857 | (FPT->getNumArgs() == 2 && NumPlacementArgs == 0)); |
John McCall | 7d8647f | 2010-09-14 07:57:04 +0000 | [diff] [blame] | 858 | |
| 859 | CallArgList DeleteArgs; |
| 860 | |
| 861 | // The first argument is always a void*. |
| 862 | FunctionProtoType::arg_type_iterator AI = FPT->arg_type_begin(); |
| 863 | DeleteArgs.push_back(std::make_pair(RValue::get(Ptr), *AI++)); |
| 864 | |
| 865 | // A member 'operator delete' can take an extra 'size_t' argument. |
| 866 | if (FPT->getNumArgs() == NumPlacementArgs + 2) |
| 867 | DeleteArgs.push_back(std::make_pair(RValue::get(AllocSize), *AI++)); |
| 868 | |
| 869 | // Pass the rest of the arguments, which must match exactly. |
| 870 | for (unsigned I = 0; I != NumPlacementArgs; ++I) |
| 871 | DeleteArgs.push_back(std::make_pair(getPlacementArgs()[I], *AI++)); |
| 872 | |
| 873 | // Call 'operator delete'. |
| 874 | CGF.EmitCall(CGF.CGM.getTypes().getFunctionInfo(DeleteArgs, FPT), |
| 875 | CGF.CGM.GetAddrOfFunction(OperatorDelete), |
| 876 | ReturnValueSlot(), DeleteArgs, OperatorDelete); |
| 877 | } |
| 878 | }; |
John McCall | 3019c44 | 2010-09-17 00:50:28 +0000 | [diff] [blame] | 879 | |
| 880 | /// A cleanup to call the given 'operator delete' function upon |
| 881 | /// abnormal exit from a new expression when the new expression is |
| 882 | /// conditional. |
| 883 | class CallDeleteDuringConditionalNew : public EHScopeStack::Cleanup { |
| 884 | size_t NumPlacementArgs; |
| 885 | const FunctionDecl *OperatorDelete; |
| 886 | SavedRValue Ptr; |
| 887 | SavedRValue AllocSize; |
| 888 | |
| 889 | SavedRValue *getPlacementArgs() { |
| 890 | return reinterpret_cast<SavedRValue*>(this+1); |
| 891 | } |
| 892 | |
| 893 | public: |
| 894 | static size_t getExtraSize(size_t NumPlacementArgs) { |
| 895 | return NumPlacementArgs * sizeof(SavedRValue); |
| 896 | } |
| 897 | |
| 898 | CallDeleteDuringConditionalNew(size_t NumPlacementArgs, |
| 899 | const FunctionDecl *OperatorDelete, |
| 900 | SavedRValue Ptr, |
| 901 | SavedRValue AllocSize) |
| 902 | : NumPlacementArgs(NumPlacementArgs), OperatorDelete(OperatorDelete), |
| 903 | Ptr(Ptr), AllocSize(AllocSize) {} |
| 904 | |
| 905 | void setPlacementArg(unsigned I, SavedRValue Arg) { |
| 906 | assert(I < NumPlacementArgs && "index out of range"); |
| 907 | getPlacementArgs()[I] = Arg; |
| 908 | } |
| 909 | |
| 910 | void Emit(CodeGenFunction &CGF, bool IsForEH) { |
| 911 | const FunctionProtoType *FPT |
| 912 | = OperatorDelete->getType()->getAs<FunctionProtoType>(); |
| 913 | assert(FPT->getNumArgs() == NumPlacementArgs + 1 || |
| 914 | (FPT->getNumArgs() == 2 && NumPlacementArgs == 0)); |
| 915 | |
| 916 | CallArgList DeleteArgs; |
| 917 | |
| 918 | // The first argument is always a void*. |
| 919 | FunctionProtoType::arg_type_iterator AI = FPT->arg_type_begin(); |
| 920 | DeleteArgs.push_back(std::make_pair(RestoreRValue(CGF, Ptr), *AI++)); |
| 921 | |
| 922 | // A member 'operator delete' can take an extra 'size_t' argument. |
| 923 | if (FPT->getNumArgs() == NumPlacementArgs + 2) { |
| 924 | RValue RV = RestoreRValue(CGF, AllocSize); |
| 925 | DeleteArgs.push_back(std::make_pair(RV, *AI++)); |
| 926 | } |
| 927 | |
| 928 | // Pass the rest of the arguments, which must match exactly. |
| 929 | for (unsigned I = 0; I != NumPlacementArgs; ++I) { |
| 930 | RValue RV = RestoreRValue(CGF, getPlacementArgs()[I]); |
| 931 | DeleteArgs.push_back(std::make_pair(RV, *AI++)); |
| 932 | } |
| 933 | |
| 934 | // Call 'operator delete'. |
| 935 | CGF.EmitCall(CGF.CGM.getTypes().getFunctionInfo(DeleteArgs, FPT), |
| 936 | CGF.CGM.GetAddrOfFunction(OperatorDelete), |
| 937 | ReturnValueSlot(), DeleteArgs, OperatorDelete); |
| 938 | } |
| 939 | }; |
| 940 | } |
| 941 | |
| 942 | /// Enter a cleanup to call 'operator delete' if the initializer in a |
| 943 | /// new-expression throws. |
| 944 | static void EnterNewDeleteCleanup(CodeGenFunction &CGF, |
| 945 | const CXXNewExpr *E, |
| 946 | llvm::Value *NewPtr, |
| 947 | llvm::Value *AllocSize, |
| 948 | const CallArgList &NewArgs) { |
| 949 | // If we're not inside a conditional branch, then the cleanup will |
| 950 | // dominate and we can do the easier (and more efficient) thing. |
| 951 | if (!CGF.isInConditionalBranch()) { |
| 952 | CallDeleteDuringNew *Cleanup = CGF.EHStack |
| 953 | .pushCleanupWithExtra<CallDeleteDuringNew>(EHCleanup, |
| 954 | E->getNumPlacementArgs(), |
| 955 | E->getOperatorDelete(), |
| 956 | NewPtr, AllocSize); |
| 957 | for (unsigned I = 0, N = E->getNumPlacementArgs(); I != N; ++I) |
| 958 | Cleanup->setPlacementArg(I, NewArgs[I+1].first); |
| 959 | |
| 960 | return; |
| 961 | } |
| 962 | |
| 963 | // Otherwise, we need to save all this stuff. |
| 964 | SavedRValue SavedNewPtr = SaveRValue(CGF, RValue::get(NewPtr)); |
| 965 | SavedRValue SavedAllocSize = SaveRValue(CGF, RValue::get(AllocSize)); |
| 966 | |
| 967 | CallDeleteDuringConditionalNew *Cleanup = CGF.EHStack |
| 968 | .pushCleanupWithExtra<CallDeleteDuringConditionalNew>(InactiveEHCleanup, |
| 969 | E->getNumPlacementArgs(), |
| 970 | E->getOperatorDelete(), |
| 971 | SavedNewPtr, |
| 972 | SavedAllocSize); |
| 973 | for (unsigned I = 0, N = E->getNumPlacementArgs(); I != N; ++I) |
| 974 | Cleanup->setPlacementArg(I, SaveRValue(CGF, NewArgs[I+1].first)); |
| 975 | |
| 976 | CGF.ActivateCleanupBlock(CGF.EHStack.stable_begin()); |
John McCall | 7d8647f | 2010-09-14 07:57:04 +0000 | [diff] [blame] | 977 | } |
| 978 | |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 979 | llvm::Value *CodeGenFunction::EmitCXXNewExpr(const CXXNewExpr *E) { |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 980 | QualType AllocType = E->getAllocatedType(); |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 981 | if (AllocType->isArrayType()) |
| 982 | while (const ArrayType *AType = getContext().getAsArrayType(AllocType)) |
| 983 | AllocType = AType->getElementType(); |
| 984 | |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 985 | FunctionDecl *NewFD = E->getOperatorNew(); |
| 986 | const FunctionProtoType *NewFTy = NewFD->getType()->getAs<FunctionProtoType>(); |
| 987 | |
| 988 | CallArgList NewArgs; |
| 989 | |
| 990 | // The allocation size is the first argument. |
| 991 | QualType SizeTy = getContext().getSizeType(); |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 992 | |
Anders Carlsson | a4d4c01 | 2009-09-23 16:07:23 +0000 | [diff] [blame] | 993 | llvm::Value *NumElements = 0; |
Douglas Gregor | 59174c0 | 2010-07-21 01:10:17 +0000 | [diff] [blame] | 994 | llvm::Value *AllocSizeWithoutCookie = 0; |
Fariborz Jahanian | ceb43b6 | 2010-03-24 16:57:01 +0000 | [diff] [blame] | 995 | llvm::Value *AllocSize = EmitCXXNewAllocSize(getContext(), |
Douglas Gregor | 59174c0 | 2010-07-21 01:10:17 +0000 | [diff] [blame] | 996 | *this, E, NumElements, |
| 997 | AllocSizeWithoutCookie); |
Anders Carlsson | a4d4c01 | 2009-09-23 16:07:23 +0000 | [diff] [blame] | 998 | |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 999 | NewArgs.push_back(std::make_pair(RValue::get(AllocSize), SizeTy)); |
| 1000 | |
| 1001 | // Emit the rest of the arguments. |
| 1002 | // FIXME: Ideally, this should just use EmitCallArgs. |
| 1003 | CXXNewExpr::const_arg_iterator NewArg = E->placement_arg_begin(); |
| 1004 | |
| 1005 | // First, use the types from the function type. |
| 1006 | // We start at 1 here because the first argument (the allocation size) |
| 1007 | // has already been emitted. |
| 1008 | for (unsigned i = 1, e = NewFTy->getNumArgs(); i != e; ++i, ++NewArg) { |
| 1009 | QualType ArgType = NewFTy->getArgType(i); |
| 1010 | |
| 1011 | assert(getContext().getCanonicalType(ArgType.getNonReferenceType()). |
| 1012 | getTypePtr() == |
| 1013 | getContext().getCanonicalType(NewArg->getType()).getTypePtr() && |
| 1014 | "type mismatch in call argument!"); |
| 1015 | |
| 1016 | NewArgs.push_back(std::make_pair(EmitCallArg(*NewArg, ArgType), |
| 1017 | ArgType)); |
| 1018 | |
| 1019 | } |
| 1020 | |
| 1021 | // Either we've emitted all the call args, or we have a call to a |
| 1022 | // variadic function. |
| 1023 | assert((NewArg == E->placement_arg_end() || NewFTy->isVariadic()) && |
| 1024 | "Extra arguments in non-variadic function!"); |
| 1025 | |
| 1026 | // If we still have any arguments, emit them using the type of the argument. |
| 1027 | for (CXXNewExpr::const_arg_iterator NewArgEnd = E->placement_arg_end(); |
| 1028 | NewArg != NewArgEnd; ++NewArg) { |
| 1029 | QualType ArgType = NewArg->getType(); |
| 1030 | NewArgs.push_back(std::make_pair(EmitCallArg(*NewArg, ArgType), |
| 1031 | ArgType)); |
| 1032 | } |
| 1033 | |
| 1034 | // Emit the call to new. |
| 1035 | RValue RV = |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 1036 | EmitCall(CGM.getTypes().getFunctionInfo(NewArgs, NewFTy), |
Anders Carlsson | f3c47c9 | 2009-12-24 19:25:24 +0000 | [diff] [blame] | 1037 | CGM.GetAddrOfFunction(NewFD), ReturnValueSlot(), NewArgs, NewFD); |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 1038 | |
| 1039 | // If an allocation function is declared with an empty exception specification |
| 1040 | // it returns null to indicate failure to allocate storage. [expr.new]p13. |
| 1041 | // (We don't need to check for null when there's no new initializer and |
| 1042 | // we're allocating a POD type). |
| 1043 | bool NullCheckResult = NewFTy->hasEmptyExceptionSpec() && |
| 1044 | !(AllocType->isPODType() && !E->hasInitializer()); |
| 1045 | |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1046 | llvm::BasicBlock *NullCheckSource = 0; |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 1047 | llvm::BasicBlock *NewNotNull = 0; |
| 1048 | llvm::BasicBlock *NewEnd = 0; |
| 1049 | |
| 1050 | llvm::Value *NewPtr = RV.getScalarVal(); |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1051 | unsigned AS = cast<llvm::PointerType>(NewPtr->getType())->getAddressSpace(); |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 1052 | |
| 1053 | if (NullCheckResult) { |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1054 | NullCheckSource = Builder.GetInsertBlock(); |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 1055 | NewNotNull = createBasicBlock("new.notnull"); |
| 1056 | NewEnd = createBasicBlock("new.end"); |
| 1057 | |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1058 | llvm::Value *IsNull = Builder.CreateIsNull(NewPtr, "new.isnull"); |
| 1059 | Builder.CreateCondBr(IsNull, NewEnd, NewNotNull); |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 1060 | EmitBlock(NewNotNull); |
| 1061 | } |
Ken Dyck | caf647c | 2010-01-26 19:44:24 +0000 | [diff] [blame] | 1062 | |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1063 | assert((AllocSize == AllocSizeWithoutCookie) == |
| 1064 | CalculateCookiePadding(*this, E).isZero()); |
| 1065 | if (AllocSize != AllocSizeWithoutCookie) { |
| 1066 | assert(E->isArray()); |
| 1067 | NewPtr = CGM.getCXXABI().InitializeArrayCookie(CGF, NewPtr, NumElements, |
| 1068 | AllocType); |
| 1069 | } |
Anders Carlsson | 6ac5fc4 | 2009-09-23 18:59:48 +0000 | [diff] [blame] | 1070 | |
John McCall | 7d8647f | 2010-09-14 07:57:04 +0000 | [diff] [blame] | 1071 | // If there's an operator delete, enter a cleanup to call it if an |
| 1072 | // exception is thrown. |
| 1073 | EHScopeStack::stable_iterator CallOperatorDelete; |
| 1074 | if (E->getOperatorDelete()) { |
John McCall | 3019c44 | 2010-09-17 00:50:28 +0000 | [diff] [blame] | 1075 | EnterNewDeleteCleanup(*this, E, NewPtr, AllocSize, NewArgs); |
John McCall | 7d8647f | 2010-09-14 07:57:04 +0000 | [diff] [blame] | 1076 | CallOperatorDelete = EHStack.stable_begin(); |
| 1077 | } |
| 1078 | |
Douglas Gregor | cc09c02 | 2010-09-02 23:24:14 +0000 | [diff] [blame] | 1079 | const llvm::Type *ElementPtrTy |
| 1080 | = ConvertTypeForMem(AllocType)->getPointerTo(AS); |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1081 | NewPtr = Builder.CreateBitCast(NewPtr, ElementPtrTy); |
John McCall | 7d8647f | 2010-09-14 07:57:04 +0000 | [diff] [blame] | 1082 | |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1083 | if (E->isArray()) { |
Douglas Gregor | 59174c0 | 2010-07-21 01:10:17 +0000 | [diff] [blame] | 1084 | EmitNewInitializer(*this, E, NewPtr, NumElements, AllocSizeWithoutCookie); |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1085 | |
| 1086 | // NewPtr is a pointer to the base element type. If we're |
| 1087 | // allocating an array of arrays, we'll need to cast back to the |
| 1088 | // array pointer type. |
Douglas Gregor | cc09c02 | 2010-09-02 23:24:14 +0000 | [diff] [blame] | 1089 | const llvm::Type *ResultTy = ConvertTypeForMem(E->getType()); |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1090 | if (NewPtr->getType() != ResultTy) |
| 1091 | NewPtr = Builder.CreateBitCast(NewPtr, ResultTy); |
| 1092 | } else { |
Douglas Gregor | 59174c0 | 2010-07-21 01:10:17 +0000 | [diff] [blame] | 1093 | EmitNewInitializer(*this, E, NewPtr, NumElements, AllocSizeWithoutCookie); |
Fariborz Jahanian | ceb43b6 | 2010-03-24 16:57:01 +0000 | [diff] [blame] | 1094 | } |
John McCall | 7d8647f | 2010-09-14 07:57:04 +0000 | [diff] [blame] | 1095 | |
| 1096 | // Deactivate the 'operator delete' cleanup if we finished |
| 1097 | // initialization. |
| 1098 | if (CallOperatorDelete.isValid()) |
| 1099 | DeactivateCleanupBlock(CallOperatorDelete); |
Fariborz Jahanian | ceb43b6 | 2010-03-24 16:57:01 +0000 | [diff] [blame] | 1100 | |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 1101 | if (NullCheckResult) { |
| 1102 | Builder.CreateBr(NewEnd); |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1103 | llvm::BasicBlock *NotNullSource = Builder.GetInsertBlock(); |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 1104 | EmitBlock(NewEnd); |
| 1105 | |
| 1106 | llvm::PHINode *PHI = Builder.CreatePHI(NewPtr->getType()); |
| 1107 | PHI->reserveOperandSpace(2); |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1108 | PHI->addIncoming(NewPtr, NotNullSource); |
| 1109 | PHI->addIncoming(llvm::Constant::getNullValue(NewPtr->getType()), |
| 1110 | NullCheckSource); |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 1111 | |
| 1112 | NewPtr = PHI; |
| 1113 | } |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1114 | |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 1115 | return NewPtr; |
| 1116 | } |
| 1117 | |
Eli Friedman | 5fe0598 | 2009-11-18 00:50:08 +0000 | [diff] [blame] | 1118 | void CodeGenFunction::EmitDeleteCall(const FunctionDecl *DeleteFD, |
| 1119 | llvm::Value *Ptr, |
| 1120 | QualType DeleteTy) { |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1121 | assert(DeleteFD->getOverloadedOperator() == OO_Delete); |
| 1122 | |
Eli Friedman | 5fe0598 | 2009-11-18 00:50:08 +0000 | [diff] [blame] | 1123 | const FunctionProtoType *DeleteFTy = |
| 1124 | DeleteFD->getType()->getAs<FunctionProtoType>(); |
| 1125 | |
| 1126 | CallArgList DeleteArgs; |
| 1127 | |
Anders Carlsson | 871d078 | 2009-12-13 20:04:38 +0000 | [diff] [blame] | 1128 | // Check if we need to pass the size to the delete operator. |
| 1129 | llvm::Value *Size = 0; |
| 1130 | QualType SizeTy; |
| 1131 | if (DeleteFTy->getNumArgs() == 2) { |
| 1132 | SizeTy = DeleteFTy->getArgType(1); |
Ken Dyck | 4f122ef | 2010-01-26 19:59:28 +0000 | [diff] [blame] | 1133 | CharUnits DeleteTypeSize = getContext().getTypeSizeInChars(DeleteTy); |
| 1134 | Size = llvm::ConstantInt::get(ConvertType(SizeTy), |
| 1135 | DeleteTypeSize.getQuantity()); |
Anders Carlsson | 871d078 | 2009-12-13 20:04:38 +0000 | [diff] [blame] | 1136 | } |
| 1137 | |
Eli Friedman | 5fe0598 | 2009-11-18 00:50:08 +0000 | [diff] [blame] | 1138 | QualType ArgTy = DeleteFTy->getArgType(0); |
| 1139 | llvm::Value *DeletePtr = Builder.CreateBitCast(Ptr, ConvertType(ArgTy)); |
| 1140 | DeleteArgs.push_back(std::make_pair(RValue::get(DeletePtr), ArgTy)); |
| 1141 | |
Anders Carlsson | 871d078 | 2009-12-13 20:04:38 +0000 | [diff] [blame] | 1142 | if (Size) |
Eli Friedman | 5fe0598 | 2009-11-18 00:50:08 +0000 | [diff] [blame] | 1143 | DeleteArgs.push_back(std::make_pair(RValue::get(Size), SizeTy)); |
Eli Friedman | 5fe0598 | 2009-11-18 00:50:08 +0000 | [diff] [blame] | 1144 | |
| 1145 | // Emit the call to delete. |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 1146 | EmitCall(CGM.getTypes().getFunctionInfo(DeleteArgs, DeleteFTy), |
Anders Carlsson | f3c47c9 | 2009-12-24 19:25:24 +0000 | [diff] [blame] | 1147 | CGM.GetAddrOfFunction(DeleteFD), ReturnValueSlot(), |
Eli Friedman | 5fe0598 | 2009-11-18 00:50:08 +0000 | [diff] [blame] | 1148 | DeleteArgs, DeleteFD); |
| 1149 | } |
| 1150 | |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1151 | namespace { |
| 1152 | /// Calls the given 'operator delete' on a single object. |
| 1153 | struct CallObjectDelete : EHScopeStack::Cleanup { |
| 1154 | llvm::Value *Ptr; |
| 1155 | const FunctionDecl *OperatorDelete; |
| 1156 | QualType ElementType; |
| 1157 | |
| 1158 | CallObjectDelete(llvm::Value *Ptr, |
| 1159 | const FunctionDecl *OperatorDelete, |
| 1160 | QualType ElementType) |
| 1161 | : Ptr(Ptr), OperatorDelete(OperatorDelete), ElementType(ElementType) {} |
| 1162 | |
| 1163 | void Emit(CodeGenFunction &CGF, bool IsForEH) { |
| 1164 | CGF.EmitDeleteCall(OperatorDelete, Ptr, ElementType); |
| 1165 | } |
| 1166 | }; |
| 1167 | } |
| 1168 | |
| 1169 | /// Emit the code for deleting a single object. |
| 1170 | static void EmitObjectDelete(CodeGenFunction &CGF, |
| 1171 | const FunctionDecl *OperatorDelete, |
| 1172 | llvm::Value *Ptr, |
| 1173 | QualType ElementType) { |
| 1174 | // Find the destructor for the type, if applicable. If the |
| 1175 | // destructor is virtual, we'll just emit the vcall and return. |
| 1176 | const CXXDestructorDecl *Dtor = 0; |
| 1177 | if (const RecordType *RT = ElementType->getAs<RecordType>()) { |
| 1178 | CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); |
| 1179 | if (!RD->hasTrivialDestructor()) { |
| 1180 | Dtor = RD->getDestructor(); |
| 1181 | |
| 1182 | if (Dtor->isVirtual()) { |
| 1183 | const llvm::Type *Ty = |
John McCall | fc40028 | 2010-09-03 01:26:39 +0000 | [diff] [blame] | 1184 | CGF.getTypes().GetFunctionType(CGF.getTypes().getFunctionInfo(Dtor, |
| 1185 | Dtor_Complete), |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1186 | /*isVariadic=*/false); |
| 1187 | |
| 1188 | llvm::Value *Callee |
| 1189 | = CGF.BuildVirtualCall(Dtor, Dtor_Deleting, Ptr, Ty); |
| 1190 | CGF.EmitCXXMemberCall(Dtor, Callee, ReturnValueSlot(), Ptr, /*VTT=*/0, |
| 1191 | 0, 0); |
| 1192 | |
| 1193 | // The dtor took care of deleting the object. |
| 1194 | return; |
| 1195 | } |
| 1196 | } |
| 1197 | } |
| 1198 | |
| 1199 | // Make sure that we call delete even if the dtor throws. |
| 1200 | CGF.EHStack.pushCleanup<CallObjectDelete>(NormalAndEHCleanup, |
| 1201 | Ptr, OperatorDelete, ElementType); |
| 1202 | |
| 1203 | if (Dtor) |
| 1204 | CGF.EmitCXXDestructorCall(Dtor, Dtor_Complete, |
| 1205 | /*ForVirtualBase=*/false, Ptr); |
| 1206 | |
| 1207 | CGF.PopCleanupBlock(); |
| 1208 | } |
| 1209 | |
| 1210 | namespace { |
| 1211 | /// Calls the given 'operator delete' on an array of objects. |
| 1212 | struct CallArrayDelete : EHScopeStack::Cleanup { |
| 1213 | llvm::Value *Ptr; |
| 1214 | const FunctionDecl *OperatorDelete; |
| 1215 | llvm::Value *NumElements; |
| 1216 | QualType ElementType; |
| 1217 | CharUnits CookieSize; |
| 1218 | |
| 1219 | CallArrayDelete(llvm::Value *Ptr, |
| 1220 | const FunctionDecl *OperatorDelete, |
| 1221 | llvm::Value *NumElements, |
| 1222 | QualType ElementType, |
| 1223 | CharUnits CookieSize) |
| 1224 | : Ptr(Ptr), OperatorDelete(OperatorDelete), NumElements(NumElements), |
| 1225 | ElementType(ElementType), CookieSize(CookieSize) {} |
| 1226 | |
| 1227 | void Emit(CodeGenFunction &CGF, bool IsForEH) { |
| 1228 | const FunctionProtoType *DeleteFTy = |
| 1229 | OperatorDelete->getType()->getAs<FunctionProtoType>(); |
| 1230 | assert(DeleteFTy->getNumArgs() == 1 || DeleteFTy->getNumArgs() == 2); |
| 1231 | |
| 1232 | CallArgList Args; |
| 1233 | |
| 1234 | // Pass the pointer as the first argument. |
| 1235 | QualType VoidPtrTy = DeleteFTy->getArgType(0); |
| 1236 | llvm::Value *DeletePtr |
| 1237 | = CGF.Builder.CreateBitCast(Ptr, CGF.ConvertType(VoidPtrTy)); |
| 1238 | Args.push_back(std::make_pair(RValue::get(DeletePtr), VoidPtrTy)); |
| 1239 | |
| 1240 | // Pass the original requested size as the second argument. |
| 1241 | if (DeleteFTy->getNumArgs() == 2) { |
| 1242 | QualType size_t = DeleteFTy->getArgType(1); |
| 1243 | const llvm::IntegerType *SizeTy |
| 1244 | = cast<llvm::IntegerType>(CGF.ConvertType(size_t)); |
| 1245 | |
| 1246 | CharUnits ElementTypeSize = |
| 1247 | CGF.CGM.getContext().getTypeSizeInChars(ElementType); |
| 1248 | |
| 1249 | // The size of an element, multiplied by the number of elements. |
| 1250 | llvm::Value *Size |
| 1251 | = llvm::ConstantInt::get(SizeTy, ElementTypeSize.getQuantity()); |
| 1252 | Size = CGF.Builder.CreateMul(Size, NumElements); |
| 1253 | |
| 1254 | // Plus the size of the cookie if applicable. |
| 1255 | if (!CookieSize.isZero()) { |
| 1256 | llvm::Value *CookieSizeV |
| 1257 | = llvm::ConstantInt::get(SizeTy, CookieSize.getQuantity()); |
| 1258 | Size = CGF.Builder.CreateAdd(Size, CookieSizeV); |
| 1259 | } |
| 1260 | |
| 1261 | Args.push_back(std::make_pair(RValue::get(Size), size_t)); |
| 1262 | } |
| 1263 | |
| 1264 | // Emit the call to delete. |
| 1265 | CGF.EmitCall(CGF.getTypes().getFunctionInfo(Args, DeleteFTy), |
| 1266 | CGF.CGM.GetAddrOfFunction(OperatorDelete), |
| 1267 | ReturnValueSlot(), Args, OperatorDelete); |
| 1268 | } |
| 1269 | }; |
| 1270 | } |
| 1271 | |
| 1272 | /// Emit the code for deleting an array of objects. |
| 1273 | static void EmitArrayDelete(CodeGenFunction &CGF, |
| 1274 | const FunctionDecl *OperatorDelete, |
| 1275 | llvm::Value *Ptr, |
| 1276 | QualType ElementType) { |
| 1277 | llvm::Value *NumElements = 0; |
| 1278 | llvm::Value *AllocatedPtr = 0; |
| 1279 | CharUnits CookieSize; |
| 1280 | CGF.CGM.getCXXABI().ReadArrayCookie(CGF, Ptr, ElementType, |
| 1281 | NumElements, AllocatedPtr, CookieSize); |
| 1282 | |
| 1283 | assert(AllocatedPtr && "ReadArrayCookie didn't set AllocatedPtr"); |
| 1284 | |
| 1285 | // Make sure that we call delete even if one of the dtors throws. |
| 1286 | CGF.EHStack.pushCleanup<CallArrayDelete>(NormalAndEHCleanup, |
| 1287 | AllocatedPtr, OperatorDelete, |
| 1288 | NumElements, ElementType, |
| 1289 | CookieSize); |
| 1290 | |
| 1291 | if (const CXXRecordDecl *RD = ElementType->getAsCXXRecordDecl()) { |
| 1292 | if (!RD->hasTrivialDestructor()) { |
| 1293 | assert(NumElements && "ReadArrayCookie didn't find element count" |
| 1294 | " for a class with destructor"); |
| 1295 | CGF.EmitCXXAggrDestructorCall(RD->getDestructor(), NumElements, Ptr); |
| 1296 | } |
| 1297 | } |
| 1298 | |
| 1299 | CGF.PopCleanupBlock(); |
| 1300 | } |
| 1301 | |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 1302 | void CodeGenFunction::EmitCXXDeleteExpr(const CXXDeleteExpr *E) { |
Fariborz Jahanian | 72c2153 | 2009-11-13 19:27:47 +0000 | [diff] [blame] | 1303 | |
Douglas Gregor | 9091656 | 2009-09-29 18:16:17 +0000 | [diff] [blame] | 1304 | // Get at the argument before we performed the implicit conversion |
| 1305 | // to void*. |
| 1306 | const Expr *Arg = E->getArgument(); |
| 1307 | while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(Arg)) { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1308 | if (ICE->getCastKind() != CK_UserDefinedConversion && |
Douglas Gregor | 9091656 | 2009-09-29 18:16:17 +0000 | [diff] [blame] | 1309 | ICE->getType()->isVoidPointerType()) |
| 1310 | Arg = ICE->getSubExpr(); |
Douglas Gregor | d69dd78 | 2009-10-01 05:49:51 +0000 | [diff] [blame] | 1311 | else |
| 1312 | break; |
Douglas Gregor | 9091656 | 2009-09-29 18:16:17 +0000 | [diff] [blame] | 1313 | } |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 1314 | |
Douglas Gregor | 9091656 | 2009-09-29 18:16:17 +0000 | [diff] [blame] | 1315 | llvm::Value *Ptr = EmitScalarExpr(Arg); |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 1316 | |
| 1317 | // Null check the pointer. |
| 1318 | llvm::BasicBlock *DeleteNotNull = createBasicBlock("delete.notnull"); |
| 1319 | llvm::BasicBlock *DeleteEnd = createBasicBlock("delete.end"); |
| 1320 | |
| 1321 | llvm::Value *IsNull = |
| 1322 | Builder.CreateICmpEQ(Ptr, llvm::Constant::getNullValue(Ptr->getType()), |
| 1323 | "isnull"); |
| 1324 | |
| 1325 | Builder.CreateCondBr(IsNull, DeleteEnd, DeleteNotNull); |
| 1326 | EmitBlock(DeleteNotNull); |
Anders Carlsson | 566abee | 2009-11-13 04:45:41 +0000 | [diff] [blame] | 1327 | |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1328 | // We might be deleting a pointer to array. If so, GEP down to the |
| 1329 | // first non-array element. |
| 1330 | // (this assumes that A(*)[3][7] is converted to [3 x [7 x %A]]*) |
| 1331 | QualType DeleteTy = Arg->getType()->getAs<PointerType>()->getPointeeType(); |
| 1332 | if (DeleteTy->isConstantArrayType()) { |
| 1333 | llvm::Value *Zero = Builder.getInt32(0); |
| 1334 | llvm::SmallVector<llvm::Value*,8> GEP; |
| 1335 | |
| 1336 | GEP.push_back(Zero); // point at the outermost array |
| 1337 | |
| 1338 | // For each layer of array type we're pointing at: |
| 1339 | while (const ConstantArrayType *Arr |
| 1340 | = getContext().getAsConstantArrayType(DeleteTy)) { |
| 1341 | // 1. Unpeel the array type. |
| 1342 | DeleteTy = Arr->getElementType(); |
| 1343 | |
| 1344 | // 2. GEP to the first element of the array. |
| 1345 | GEP.push_back(Zero); |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 1346 | } |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1347 | |
| 1348 | Ptr = Builder.CreateInBoundsGEP(Ptr, GEP.begin(), GEP.end(), "del.first"); |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 1349 | } |
| 1350 | |
Douglas Gregor | eede61a | 2010-09-02 17:38:50 +0000 | [diff] [blame] | 1351 | assert(ConvertTypeForMem(DeleteTy) == |
| 1352 | cast<llvm::PointerType>(Ptr->getType())->getElementType()); |
John McCall | 1e7fe75 | 2010-09-02 09:58:18 +0000 | [diff] [blame] | 1353 | |
| 1354 | if (E->isArrayForm()) { |
| 1355 | EmitArrayDelete(*this, E->getOperatorDelete(), Ptr, DeleteTy); |
| 1356 | } else { |
| 1357 | EmitObjectDelete(*this, E->getOperatorDelete(), Ptr, DeleteTy); |
| 1358 | } |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 1359 | |
Anders Carlsson | 16d81b8 | 2009-09-22 22:53:17 +0000 | [diff] [blame] | 1360 | EmitBlock(DeleteEnd); |
| 1361 | } |
Mike Stump | c2e84ae | 2009-11-15 08:09:41 +0000 | [diff] [blame] | 1362 | |
| 1363 | llvm::Value * CodeGenFunction::EmitCXXTypeidExpr(const CXXTypeidExpr *E) { |
| 1364 | QualType Ty = E->getType(); |
| 1365 | const llvm::Type *LTy = ConvertType(Ty)->getPointerTo(); |
Anders Carlsson | 31b7f52 | 2009-12-11 02:46:30 +0000 | [diff] [blame] | 1366 | |
Anders Carlsson | 1d7088d | 2009-12-17 07:09:17 +0000 | [diff] [blame] | 1367 | if (E->isTypeOperand()) { |
| 1368 | llvm::Constant *TypeInfo = |
| 1369 | CGM.GetAddrOfRTTIDescriptor(E->getTypeOperand()); |
| 1370 | return Builder.CreateBitCast(TypeInfo, LTy); |
| 1371 | } |
| 1372 | |
Mike Stump | c2e84ae | 2009-11-15 08:09:41 +0000 | [diff] [blame] | 1373 | Expr *subE = E->getExprOperand(); |
Mike Stump | 5fae856 | 2009-11-17 22:33:00 +0000 | [diff] [blame] | 1374 | Ty = subE->getType(); |
| 1375 | CanQualType CanTy = CGM.getContext().getCanonicalType(Ty); |
| 1376 | Ty = CanTy.getUnqualifiedType().getNonReferenceType(); |
Mike Stump | c2e84ae | 2009-11-15 08:09:41 +0000 | [diff] [blame] | 1377 | if (const RecordType *RT = Ty->getAs<RecordType>()) { |
| 1378 | const CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); |
| 1379 | if (RD->isPolymorphic()) { |
| 1380 | // FIXME: if subE is an lvalue do |
| 1381 | LValue Obj = EmitLValue(subE); |
| 1382 | llvm::Value *This = Obj.getAddress(); |
Mike Stump | f549e89 | 2009-11-15 16:52:53 +0000 | [diff] [blame] | 1383 | // We need to do a zero check for *p, unless it has NonNullAttr. |
| 1384 | // FIXME: PointerType->hasAttr<NonNullAttr>() |
| 1385 | bool CanBeZero = false; |
Mike Stump | db519a4 | 2009-11-17 00:45:21 +0000 | [diff] [blame] | 1386 | if (UnaryOperator *UO = dyn_cast<UnaryOperator>(subE->IgnoreParens())) |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1387 | if (UO->getOpcode() == UO_Deref) |
Mike Stump | f549e89 | 2009-11-15 16:52:53 +0000 | [diff] [blame] | 1388 | CanBeZero = true; |
| 1389 | if (CanBeZero) { |
| 1390 | llvm::BasicBlock *NonZeroBlock = createBasicBlock(); |
| 1391 | llvm::BasicBlock *ZeroBlock = createBasicBlock(); |
| 1392 | |
Dan Gohman | 043fb9a | 2010-10-26 18:44:08 +0000 | [diff] [blame] | 1393 | llvm::Value *Zero = llvm::Constant::getNullValue(This->getType()); |
| 1394 | Builder.CreateCondBr(Builder.CreateICmpNE(This, Zero), |
Mike Stump | f549e89 | 2009-11-15 16:52:53 +0000 | [diff] [blame] | 1395 | NonZeroBlock, ZeroBlock); |
| 1396 | EmitBlock(ZeroBlock); |
| 1397 | /// Call __cxa_bad_typeid |
| 1398 | const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext); |
| 1399 | const llvm::FunctionType *FTy; |
| 1400 | FTy = llvm::FunctionType::get(ResultType, false); |
| 1401 | llvm::Value *F = CGM.CreateRuntimeFunction(FTy, "__cxa_bad_typeid"); |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 1402 | Builder.CreateCall(F)->setDoesNotReturn(); |
Mike Stump | f549e89 | 2009-11-15 16:52:53 +0000 | [diff] [blame] | 1403 | Builder.CreateUnreachable(); |
| 1404 | EmitBlock(NonZeroBlock); |
| 1405 | } |
Dan Gohman | 043fb9a | 2010-10-26 18:44:08 +0000 | [diff] [blame] | 1406 | llvm::Value *V = GetVTablePtr(This, LTy->getPointerTo()); |
Mike Stump | c2e84ae | 2009-11-15 08:09:41 +0000 | [diff] [blame] | 1407 | V = Builder.CreateConstInBoundsGEP1_64(V, -1ULL); |
| 1408 | V = Builder.CreateLoad(V); |
| 1409 | return V; |
Anders Carlsson | 1d7088d | 2009-12-17 07:09:17 +0000 | [diff] [blame] | 1410 | } |
Mike Stump | c2e84ae | 2009-11-15 08:09:41 +0000 | [diff] [blame] | 1411 | } |
Anders Carlsson | 1d7088d | 2009-12-17 07:09:17 +0000 | [diff] [blame] | 1412 | return Builder.CreateBitCast(CGM.GetAddrOfRTTIDescriptor(Ty), LTy); |
Mike Stump | c2e84ae | 2009-11-15 08:09:41 +0000 | [diff] [blame] | 1413 | } |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 1414 | |
| 1415 | llvm::Value *CodeGenFunction::EmitDynamicCast(llvm::Value *V, |
| 1416 | const CXXDynamicCastExpr *DCE) { |
Anders Carlsson | 1d7088d | 2009-12-17 07:09:17 +0000 | [diff] [blame] | 1417 | QualType SrcTy = DCE->getSubExpr()->getType(); |
| 1418 | QualType DestTy = DCE->getTypeAsWritten(); |
| 1419 | QualType InnerType = DestTy->getPointeeType(); |
| 1420 | |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 1421 | const llvm::Type *LTy = ConvertType(DCE->getType()); |
Mike Stump | 2b35baf | 2009-11-16 22:52:20 +0000 | [diff] [blame] | 1422 | |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 1423 | bool CanBeZero = false; |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 1424 | bool ToVoid = false; |
Mike Stump | 2b35baf | 2009-11-16 22:52:20 +0000 | [diff] [blame] | 1425 | bool ThrowOnBad = false; |
Anders Carlsson | 1d7088d | 2009-12-17 07:09:17 +0000 | [diff] [blame] | 1426 | if (DestTy->isPointerType()) { |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 1427 | // FIXME: if PointerType->hasAttr<NonNullAttr>(), we don't set this |
| 1428 | CanBeZero = true; |
| 1429 | if (InnerType->isVoidType()) |
| 1430 | ToVoid = true; |
| 1431 | } else { |
| 1432 | LTy = LTy->getPointerTo(); |
Douglas Gregor | 485ee32 | 2010-05-14 21:14:41 +0000 | [diff] [blame] | 1433 | |
| 1434 | // FIXME: What if exceptions are disabled? |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 1435 | ThrowOnBad = true; |
| 1436 | } |
| 1437 | |
Anders Carlsson | 1d7088d | 2009-12-17 07:09:17 +0000 | [diff] [blame] | 1438 | if (SrcTy->isPointerType() || SrcTy->isReferenceType()) |
| 1439 | SrcTy = SrcTy->getPointeeType(); |
| 1440 | SrcTy = SrcTy.getUnqualifiedType(); |
| 1441 | |
Anders Carlsson | 6f0e485 | 2009-12-18 14:55:04 +0000 | [diff] [blame] | 1442 | if (DestTy->isPointerType() || DestTy->isReferenceType()) |
Anders Carlsson | 1d7088d | 2009-12-17 07:09:17 +0000 | [diff] [blame] | 1443 | DestTy = DestTy->getPointeeType(); |
| 1444 | DestTy = DestTy.getUnqualifiedType(); |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 1445 | |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 1446 | llvm::BasicBlock *ContBlock = createBasicBlock(); |
| 1447 | llvm::BasicBlock *NullBlock = 0; |
| 1448 | llvm::BasicBlock *NonZeroBlock = 0; |
| 1449 | if (CanBeZero) { |
| 1450 | NonZeroBlock = createBasicBlock(); |
| 1451 | NullBlock = createBasicBlock(); |
Anders Carlsson | 1d7088d | 2009-12-17 07:09:17 +0000 | [diff] [blame] | 1452 | Builder.CreateCondBr(Builder.CreateIsNotNull(V), NonZeroBlock, NullBlock); |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 1453 | EmitBlock(NonZeroBlock); |
| 1454 | } |
| 1455 | |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 1456 | llvm::BasicBlock *BadCastBlock = 0; |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 1457 | |
Anders Carlsson | 1d7088d | 2009-12-17 07:09:17 +0000 | [diff] [blame] | 1458 | const llvm::Type *PtrDiffTy = ConvertType(getContext().getPointerDiffType()); |
Mike Stump | 2b35baf | 2009-11-16 22:52:20 +0000 | [diff] [blame] | 1459 | |
| 1460 | // See if this is a dynamic_cast(void*) |
| 1461 | if (ToVoid) { |
| 1462 | llvm::Value *This = V; |
Dan Gohman | 043fb9a | 2010-10-26 18:44:08 +0000 | [diff] [blame] | 1463 | V = GetVTablePtr(This, PtrDiffTy->getPointerTo()); |
Mike Stump | 2b35baf | 2009-11-16 22:52:20 +0000 | [diff] [blame] | 1464 | V = Builder.CreateConstInBoundsGEP1_64(V, -2ULL); |
| 1465 | V = Builder.CreateLoad(V, "offset to top"); |
| 1466 | This = Builder.CreateBitCast(This, llvm::Type::getInt8PtrTy(VMContext)); |
| 1467 | V = Builder.CreateInBoundsGEP(This, V); |
| 1468 | V = Builder.CreateBitCast(V, LTy); |
| 1469 | } else { |
| 1470 | /// Call __dynamic_cast |
| 1471 | const llvm::Type *ResultType = llvm::Type::getInt8PtrTy(VMContext); |
| 1472 | const llvm::FunctionType *FTy; |
| 1473 | std::vector<const llvm::Type*> ArgTys; |
| 1474 | const llvm::Type *PtrToInt8Ty |
| 1475 | = llvm::Type::getInt8Ty(VMContext)->getPointerTo(); |
| 1476 | ArgTys.push_back(PtrToInt8Ty); |
| 1477 | ArgTys.push_back(PtrToInt8Ty); |
| 1478 | ArgTys.push_back(PtrToInt8Ty); |
| 1479 | ArgTys.push_back(PtrDiffTy); |
| 1480 | FTy = llvm::FunctionType::get(ResultType, ArgTys, false); |
Mike Stump | 2b35baf | 2009-11-16 22:52:20 +0000 | [diff] [blame] | 1481 | |
| 1482 | // FIXME: Calculate better hint. |
| 1483 | llvm::Value *hint = llvm::ConstantInt::get(PtrDiffTy, -1ULL); |
Anders Carlsson | 1d7088d | 2009-12-17 07:09:17 +0000 | [diff] [blame] | 1484 | |
| 1485 | assert(SrcTy->isRecordType() && "Src type must be record type!"); |
| 1486 | assert(DestTy->isRecordType() && "Dest type must be record type!"); |
| 1487 | |
Douglas Gregor | 154fe98 | 2009-12-23 22:04:40 +0000 | [diff] [blame] | 1488 | llvm::Value *SrcArg |
| 1489 | = CGM.GetAddrOfRTTIDescriptor(SrcTy.getUnqualifiedType()); |
| 1490 | llvm::Value *DestArg |
| 1491 | = CGM.GetAddrOfRTTIDescriptor(DestTy.getUnqualifiedType()); |
Anders Carlsson | 1d7088d | 2009-12-17 07:09:17 +0000 | [diff] [blame] | 1492 | |
Mike Stump | 2b35baf | 2009-11-16 22:52:20 +0000 | [diff] [blame] | 1493 | V = Builder.CreateBitCast(V, PtrToInt8Ty); |
| 1494 | V = Builder.CreateCall4(CGM.CreateRuntimeFunction(FTy, "__dynamic_cast"), |
Anders Carlsson | 1d7088d | 2009-12-17 07:09:17 +0000 | [diff] [blame] | 1495 | V, SrcArg, DestArg, hint); |
Mike Stump | 2b35baf | 2009-11-16 22:52:20 +0000 | [diff] [blame] | 1496 | V = Builder.CreateBitCast(V, LTy); |
| 1497 | |
| 1498 | if (ThrowOnBad) { |
| 1499 | BadCastBlock = createBasicBlock(); |
Anders Carlsson | 1d7088d | 2009-12-17 07:09:17 +0000 | [diff] [blame] | 1500 | Builder.CreateCondBr(Builder.CreateIsNotNull(V), ContBlock, BadCastBlock); |
Mike Stump | 2b35baf | 2009-11-16 22:52:20 +0000 | [diff] [blame] | 1501 | EmitBlock(BadCastBlock); |
Douglas Gregor | 485ee32 | 2010-05-14 21:14:41 +0000 | [diff] [blame] | 1502 | /// Invoke __cxa_bad_cast |
Mike Stump | 2b35baf | 2009-11-16 22:52:20 +0000 | [diff] [blame] | 1503 | ResultType = llvm::Type::getVoidTy(VMContext); |
| 1504 | const llvm::FunctionType *FBadTy; |
Mike Stump | fde17be | 2009-11-17 03:01:03 +0000 | [diff] [blame] | 1505 | FBadTy = llvm::FunctionType::get(ResultType, false); |
Mike Stump | 2b35baf | 2009-11-16 22:52:20 +0000 | [diff] [blame] | 1506 | llvm::Value *F = CGM.CreateRuntimeFunction(FBadTy, "__cxa_bad_cast"); |
Douglas Gregor | 485ee32 | 2010-05-14 21:14:41 +0000 | [diff] [blame] | 1507 | if (llvm::BasicBlock *InvokeDest = getInvokeDest()) { |
| 1508 | llvm::BasicBlock *Cont = createBasicBlock("invoke.cont"); |
| 1509 | Builder.CreateInvoke(F, Cont, InvokeDest)->setDoesNotReturn(); |
| 1510 | EmitBlock(Cont); |
| 1511 | } else { |
| 1512 | // FIXME: Does this ever make sense? |
| 1513 | Builder.CreateCall(F)->setDoesNotReturn(); |
| 1514 | } |
Mike Stump | 8b152b8 | 2009-11-17 00:08:50 +0000 | [diff] [blame] | 1515 | Builder.CreateUnreachable(); |
Mike Stump | 2b35baf | 2009-11-16 22:52:20 +0000 | [diff] [blame] | 1516 | } |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 1517 | } |
| 1518 | |
| 1519 | if (CanBeZero) { |
| 1520 | Builder.CreateBr(ContBlock); |
| 1521 | EmitBlock(NullBlock); |
| 1522 | Builder.CreateBr(ContBlock); |
| 1523 | } |
| 1524 | EmitBlock(ContBlock); |
| 1525 | if (CanBeZero) { |
| 1526 | llvm::PHINode *PHI = Builder.CreatePHI(LTy); |
Mike Stump | 14431c1 | 2009-11-17 00:10:05 +0000 | [diff] [blame] | 1527 | PHI->reserveOperandSpace(2); |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 1528 | PHI->addIncoming(V, NonZeroBlock); |
| 1529 | PHI->addIncoming(llvm::Constant::getNullValue(LTy), NullBlock); |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 1530 | V = PHI; |
| 1531 | } |
| 1532 | |
| 1533 | return V; |
| 1534 | } |