15b955920c1d8f2cd35aae3c85b656578286a8bc1Anders Carlsson//===--- CGExprCXX.cpp - Emit LLVM Code for C++ expressions ---------------===// 216d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson// 316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson// The LLVM Compiler Infrastructure 416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson// 516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson// This file is distributed under the University of Illinois Open Source 616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson// License. See LICENSE.TXT for details. 716d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson// 816d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson//===----------------------------------------------------------------------===// 916d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson// 1016d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson// This contains code dealing with code generation of C++ expressions 1116d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson// 1216d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson//===----------------------------------------------------------------------===// 1316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson#include "CodeGenFunction.h" 156c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne#include "CGCUDARuntime.h" 164c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall#include "CGCXXABI.h" 17c69e1cf04323f2e786d40e8a5ba84e77ee1c6827Devang Patel#include "CGDebugInfo.h" 1855fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "CGObjCRuntime.h" 1955fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Frontend/CodeGenOptions.h" 203b844ba7d5be205a9b4f5f0b0d1b7978977f4b8cChandler Carruth#include "llvm/IR/Intrinsics.h" 21ad3692bbe1874abafae1757a2b9d3bfa2249dc43Anders Carlsson#include "llvm/Support/CallSite.h" 22ad3692bbe1874abafae1757a2b9d3bfa2249dc43Anders Carlsson 2316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlssonusing namespace clang; 2416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlssonusing namespace CodeGen; 2516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 263b5ad2283c999f6edf7d42332a655447b7386b2eAnders CarlssonRValue CodeGenFunction::EmitCXXMemberCall(const CXXMethodDecl *MD, 274def70d3040e73707c738f7c366737a986135edfRichard Smith SourceLocation CallLoc, 283b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson llvm::Value *Callee, 293b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson ReturnValueSlot ReturnValue, 303b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson llvm::Value *This, 3159660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov llvm::Value *ImplicitParam, 3259660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov QualType ImplicitParamTy, 333b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson CallExpr::const_arg_iterator ArgBeg, 343b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson CallExpr::const_arg_iterator ArgEnd) { 353b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson assert(MD->isInstance() && 363b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson "Trying to emit a member call expr on a static method!"); 373b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 382c9f87ca5cccbfdaad82762368af5b2323320653Richard Smith // C++11 [class.mfct.non-static]p2: 392c9f87ca5cccbfdaad82762368af5b2323320653Richard Smith // If a non-static member function of a class X is called for an object that 402c9f87ca5cccbfdaad82762368af5b2323320653Richard Smith // is not of type X, or of a type derived from X, the behavior is undefined. 418e1cee6f23e2552b96b81e5ef419ab3f69c5b5c2Richard Smith EmitTypeCheck(isa<CXXConstructorDecl>(MD) ? TCK_ConstructorCall 428e1cee6f23e2552b96b81e5ef419ab3f69c5b5c2Richard Smith : TCK_MemberCall, 438e1cee6f23e2552b96b81e5ef419ab3f69c5b5c2Richard Smith CallLoc, This, getContext().getRecordType(MD->getParent())); 442c9f87ca5cccbfdaad82762368af5b2323320653Richard Smith 453b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson CallArgList Args; 463b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 473b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Push the this ptr. 4804c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman Args.add(RValue::get(This), MD->getThisType(getContext())); 493b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 5059660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov // If there is an implicit parameter (e.g. VTT), emit it. 5159660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov if (ImplicitParam) { 5259660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov Args.add(RValue::get(ImplicitParam), ImplicitParamTy); 53c997d4278d329e18891aac9698fb991b2d4622ebAnders Carlsson } 54de5d3c717684f3821b8db58037bc7140acf134aaJohn McCall 55de5d3c717684f3821b8db58037bc7140acf134aaJohn McCall const FunctionProtoType *FPT = MD->getType()->castAs<FunctionProtoType>(); 56de5d3c717684f3821b8db58037bc7140acf134aaJohn McCall RequiredArgs required = RequiredArgs::forPrototypePlus(FPT, Args.size()); 57c997d4278d329e18891aac9698fb991b2d4622ebAnders Carlsson 58de5d3c717684f3821b8db58037bc7140acf134aaJohn McCall // And the rest of the call args. 593b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson EmitCallArgs(Args, FPT, ArgBeg, ArgEnd); 603b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 610f3d0970dcdf6cf17550b86838dff12813968dbcJohn McCall return EmitCall(CGM.getTypes().arrangeCXXMethodCall(Args, FPT, required), 62264ba48dc98f3f843935a485d5b086f7e0fdc4f1Rafael Espindola Callee, ReturnValue, Args, MD); 633b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson} 643b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 65cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson// FIXME: Ideally Expr::IgnoreParenNoopCasts should do this, but it doesn't do 66cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson// quite what we want. 67cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlssonstatic const Expr *skipNoOpCastsAndParens(const Expr *E) { 68cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson while (true) { 69cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson if (const ParenExpr *PE = dyn_cast<ParenExpr>(E)) { 70cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson E = PE->getSubExpr(); 71cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson continue; 72cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson } 73cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson 74cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson if (const CastExpr *CE = dyn_cast<CastExpr>(E)) { 75cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson if (CE->getCastKind() == CK_NoOp) { 76cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson E = CE->getSubExpr(); 77cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson continue; 78cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson } 79cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson } 80cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) { 81cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson if (UO->getOpcode() == UO_Extension) { 82cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson E = UO->getSubExpr(); 83cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson continue; 84cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson } 85cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson } 86cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson return E; 87cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson } 88cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson} 89cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson 903b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson/// canDevirtualizeMemberFunctionCalls - Checks whether virtual calls on given 913b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson/// expr can be devirtualized. 927ac0ff2a8791280102a557761dbb931deb21a1dcFariborz Jahanianstatic bool canDevirtualizeMemberFunctionCalls(ASTContext &Context, 937ac0ff2a8791280102a557761dbb931deb21a1dcFariborz Jahanian const Expr *Base, 94bd2bfae2a6e5dc264e1f13183ad2ac11095766bbAnders Carlsson const CXXMethodDecl *MD) { 95bd2bfae2a6e5dc264e1f13183ad2ac11095766bbAnders Carlsson 961679f5a84ae1e578b0de347c89eaf31e0465f33cAnders Carlsson // When building with -fapple-kext, all calls must go through the vtable since 971679f5a84ae1e578b0de347c89eaf31e0465f33cAnders Carlsson // the kernel linker can do runtime patching of vtables. 984e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (Context.getLangOpts().AppleKext) 997ac0ff2a8791280102a557761dbb931deb21a1dcFariborz Jahanian return false; 1007ac0ff2a8791280102a557761dbb931deb21a1dcFariborz Jahanian 1011679f5a84ae1e578b0de347c89eaf31e0465f33cAnders Carlsson // If the most derived class is marked final, we know that no subclass can 1021679f5a84ae1e578b0de347c89eaf31e0465f33cAnders Carlsson // override this member function and so we can devirtualize it. For example: 1031679f5a84ae1e578b0de347c89eaf31e0465f33cAnders Carlsson // 1041679f5a84ae1e578b0de347c89eaf31e0465f33cAnders Carlsson // struct A { virtual void f(); } 1051679f5a84ae1e578b0de347c89eaf31e0465f33cAnders Carlsson // struct B final : A { }; 1061679f5a84ae1e578b0de347c89eaf31e0465f33cAnders Carlsson // 1071679f5a84ae1e578b0de347c89eaf31e0465f33cAnders Carlsson // void f(B *b) { 1081679f5a84ae1e578b0de347c89eaf31e0465f33cAnders Carlsson // b->f(); 1091679f5a84ae1e578b0de347c89eaf31e0465f33cAnders Carlsson // } 1101679f5a84ae1e578b0de347c89eaf31e0465f33cAnders Carlsson // 1118d852e35adb46e0799538dfc9c80d44f27cd3597Rafael Espindola const CXXRecordDecl *MostDerivedClassDecl = Base->getBestDynamicClassType(); 1121679f5a84ae1e578b0de347c89eaf31e0465f33cAnders Carlsson if (MostDerivedClassDecl->hasAttr<FinalAttr>()) 1131679f5a84ae1e578b0de347c89eaf31e0465f33cAnders Carlsson return true; 1141679f5a84ae1e578b0de347c89eaf31e0465f33cAnders Carlsson 115f89e0424b8903438179f4a2f16dddd5e5bdc814eAnders Carlsson // If the member function is marked 'final', we know that it can't be 116d66f42856539bf1c764c13fba41758228fc4cb9bAnders Carlsson // overridden and can therefore devirtualize it. 117cb88a1f968c3d4eb451dafb421a8d9578edcbf1aAnders Carlsson if (MD->hasAttr<FinalAttr>()) 118bd2bfae2a6e5dc264e1f13183ad2ac11095766bbAnders Carlsson return true; 119d66f42856539bf1c764c13fba41758228fc4cb9bAnders Carlsson 120f89e0424b8903438179f4a2f16dddd5e5bdc814eAnders Carlsson // Similarly, if the class itself is marked 'final' it can't be overridden 121f89e0424b8903438179f4a2f16dddd5e5bdc814eAnders Carlsson // and we can therefore devirtualize the member function call. 122cb88a1f968c3d4eb451dafb421a8d9578edcbf1aAnders Carlsson if (MD->getParent()->hasAttr<FinalAttr>()) 123d66f42856539bf1c764c13fba41758228fc4cb9bAnders Carlsson return true; 124d66f42856539bf1c764c13fba41758228fc4cb9bAnders Carlsson 125cd0b32e73a66a20a8dab7a7f0ce963dc669f7c0aAnders Carlsson Base = skipNoOpCastsAndParens(Base); 1263b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Base)) { 1273b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) { 1283b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // This is a record decl. We know the type and can devirtualize it. 1293b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson return VD->getType()->isRecordType(); 1303b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 1313b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 1323b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson return false; 1333b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 134ac45293276030400195133225d54ddcb3644ea20Richard Smith 135ac45293276030400195133225d54ddcb3644ea20Richard Smith // We can devirtualize calls on an object accessed by a class member access 136ac45293276030400195133225d54ddcb3644ea20Richard Smith // expression, since by C++11 [basic.life]p6 we know that it can't refer to 137ac45293276030400195133225d54ddcb3644ea20Richard Smith // a derived class object constructed in the same location. 138ac45293276030400195133225d54ddcb3644ea20Richard Smith if (const MemberExpr *ME = dyn_cast<MemberExpr>(Base)) 139ac45293276030400195133225d54ddcb3644ea20Richard Smith if (const ValueDecl *VD = dyn_cast<ValueDecl>(ME->getMemberDecl())) 140ac45293276030400195133225d54ddcb3644ea20Richard Smith return VD->getType()->isRecordType(); 141ac45293276030400195133225d54ddcb3644ea20Richard Smith 1423b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // We can always devirtualize calls on temporary object expressions. 1436997aae42800d95a1189a6186af438feb19ecc54Eli Friedman if (isa<CXXConstructExpr>(Base)) 1443b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson return true; 1453b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 1463b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // And calls on bound temporaries. 1473b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson if (isa<CXXBindTemporaryExpr>(Base)) 1483b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson return true; 1493b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 1503b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Check if this is a call expr that returns a record type. 1513b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson if (const CallExpr *CE = dyn_cast<CallExpr>(Base)) 1523b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson return CE->getCallReturnType()->isRecordType(); 153bd2bfae2a6e5dc264e1f13183ad2ac11095766bbAnders Carlsson 1543b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // We can't devirtualize the call. 1553b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson return false; 1563b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson} 1573b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 158ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindolastatic CXXRecordDecl *getCXXRecord(const Expr *E) { 159ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola QualType T = E->getType(); 160ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola if (const PointerType *PTy = T->getAs<PointerType>()) 161ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola T = PTy->getPointeeType(); 162ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola const RecordType *Ty = T->castAs<RecordType>(); 163ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola return cast<CXXRecordDecl>(Ty->getDecl()); 164ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola} 165ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola 166dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet// Note: This function also emit constructor calls to support a MSVC 167dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet// extensions allowing explicit constructor function call. 1683b5ad2283c999f6edf7d42332a655447b7386b2eAnders CarlssonRValue CodeGenFunction::EmitCXXMemberCallExpr(const CXXMemberCallExpr *CE, 1693b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson ReturnValueSlot ReturnValue) { 170379b5155b4566f63679e1da6b0ceb5fdfa2aec6dJohn McCall const Expr *callee = CE->getCallee()->IgnoreParens(); 171379b5155b4566f63679e1da6b0ceb5fdfa2aec6dJohn McCall 172379b5155b4566f63679e1da6b0ceb5fdfa2aec6dJohn McCall if (isa<BinaryOperator>(callee)) 1733b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson return EmitCXXMemberPointerCallExpr(CE, ReturnValue); 174379b5155b4566f63679e1da6b0ceb5fdfa2aec6dJohn McCall 175379b5155b4566f63679e1da6b0ceb5fdfa2aec6dJohn McCall const MemberExpr *ME = cast<MemberExpr>(callee); 1763b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const CXXMethodDecl *MD = cast<CXXMethodDecl>(ME->getMemberDecl()); 1773b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 178c69e1cf04323f2e786d40e8a5ba84e77ee1c6827Devang Patel CGDebugInfo *DI = getDebugInfo(); 1794cdad3151bfb2075c6bdbfe89fbb08f31a90a45bDouglas Gregor if (DI && 1804cdad3151bfb2075c6bdbfe89fbb08f31a90a45bDouglas Gregor CGM.getCodeGenOpts().getDebugInfo() == CodeGenOptions::LimitedDebugInfo && 1814cdad3151bfb2075c6bdbfe89fbb08f31a90a45bDouglas Gregor !isa<CallExpr>(ME->getBase())) { 182c69e1cf04323f2e786d40e8a5ba84e77ee1c6827Devang Patel QualType PQTy = ME->getBase()->IgnoreParenImpCasts()->getType(); 183c69e1cf04323f2e786d40e8a5ba84e77ee1c6827Devang Patel if (const PointerType * PTy = dyn_cast<PointerType>(PQTy)) { 184c69e1cf04323f2e786d40e8a5ba84e77ee1c6827Devang Patel DI->getOrCreateRecordType(PTy->getPointeeType(), 185c69e1cf04323f2e786d40e8a5ba84e77ee1c6827Devang Patel MD->getParent()->getLocation()); 186c69e1cf04323f2e786d40e8a5ba84e77ee1c6827Devang Patel } 187c69e1cf04323f2e786d40e8a5ba84e77ee1c6827Devang Patel } 188c69e1cf04323f2e786d40e8a5ba84e77ee1c6827Devang Patel 1893b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson if (MD->isStatic()) { 1903b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // The method is static, emit it as we would a regular call. 1913b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson llvm::Value *Callee = CGM.GetAddrOfFunction(MD); 1923b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson return EmitCall(getContext().getPointerType(MD->getType()), Callee, 1933b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson ReturnValue, CE->arg_begin(), CE->arg_end()); 1943b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 1953b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 196fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall // Compute the object pointer. 197632fbaa22fbed7c090eb83775731bfff786c2198Rafael Espindola const Expr *Base = ME->getBase(); 198632fbaa22fbed7c090eb83775731bfff786c2198Rafael Espindola bool CanUseVirtualCall = MD->isVirtual() && !ME->hasQualifier(); 199632fbaa22fbed7c090eb83775731bfff786c2198Rafael Espindola 200ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola const CXXMethodDecl *DevirtualizedMethod = NULL; 201ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola if (CanUseVirtualCall && 202ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola canDevirtualizeMemberFunctionCalls(getContext(), Base, MD)) { 203ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola const CXXRecordDecl *BestDynamicDecl = Base->getBestDynamicClassType(); 204ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola DevirtualizedMethod = MD->getCorrespondingMethodInClass(BestDynamicDecl); 205ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola assert(DevirtualizedMethod); 206ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola const CXXRecordDecl *DevirtualizedClass = DevirtualizedMethod->getParent(); 207ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola const Expr *Inner = Base->ignoreParenBaseCasts(); 208ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola if (getCXXRecord(Inner) == DevirtualizedClass) 209ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // If the class of the Inner expression is where the dynamic method 210ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // is defined, build the this pointer from it. 211ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola Base = Inner; 212ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola else if (getCXXRecord(Base) != DevirtualizedClass) { 213ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // If the method is defined in a class that is not the best dynamic 214ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // one or the one of the full expression, we would have to build 215ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // a derived-to-base cast to compute the correct this pointer, but 216ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // we don't have support for that yet, so do a virtual call. 217ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola DevirtualizedMethod = NULL; 218ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola } 21980bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola // If the return types are not the same, this might be a case where more 22080bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola // code needs to run to compensate for it. For example, the derived 22180bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola // method might return a type that inherits form from the return 22280bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola // type of MD and has a prefix. 22380bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola // For now we just avoid devirtualizing these covariant cases. 22480bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola if (DevirtualizedMethod && 22580bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola DevirtualizedMethod->getResultType().getCanonicalType() != 22680bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola MD->getResultType().getCanonicalType()) 2274a889e47bd5a8d08a705a87962a35a504728d7f6Rafael Espindola DevirtualizedMethod = NULL; 228ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola } 229632fbaa22fbed7c090eb83775731bfff786c2198Rafael Espindola 2303b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson llvm::Value *This; 2313b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson if (ME->isArrow()) 232ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola This = EmitScalarExpr(Base); 2330e800c9c20d1a658a91096c756c4a4a9e90264fcJohn McCall else 234ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola This = EmitLValue(Base).getAddress(); 235632fbaa22fbed7c090eb83775731bfff786c2198Rafael Espindola 2363b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 237fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall if (MD->isTrivial()) { 238fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall if (isa<CXXDestructorDecl>(MD)) return RValue::get(0); 239dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet if (isa<CXXConstructorDecl>(MD) && 240dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet cast<CXXConstructorDecl>(MD)->isDefaultConstructor()) 241dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet return RValue::get(0); 242dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet 24385ea7aa961deac1d754f610af8062ae3f8b4e2a5Sebastian Redl if (MD->isCopyAssignmentOperator() || MD->isMoveAssignmentOperator()) { 24485ea7aa961deac1d754f610af8062ae3f8b4e2a5Sebastian Redl // We don't like to generate the trivial copy/move assignment operator 24585ea7aa961deac1d754f610af8062ae3f8b4e2a5Sebastian Redl // when it isn't necessary; just produce the proper effect here. 246dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet llvm::Value *RHS = EmitLValue(*CE->arg_begin()).getAddress(); 2476cacae8bf9597b8124cd40aedc189c04484e1990Benjamin Kramer EmitAggregateAssign(This, RHS, CE->getType()); 248dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet return RValue::get(This); 249dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet } 250dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet 251dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet if (isa<CXXConstructorDecl>(MD) && 25285ea7aa961deac1d754f610af8062ae3f8b4e2a5Sebastian Redl cast<CXXConstructorDecl>(MD)->isCopyOrMoveConstructor()) { 25385ea7aa961deac1d754f610af8062ae3f8b4e2a5Sebastian Redl // Trivial move and copy ctor are the same. 254dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet llvm::Value *RHS = EmitLValue(*CE->arg_begin()).getAddress(); 255dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet EmitSynthesizedCXXCopyCtorCall(cast<CXXConstructorDecl>(MD), This, RHS, 256dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet CE->arg_begin(), CE->arg_end()); 257dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet return RValue::get(This); 258dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet } 259dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet llvm_unreachable("unknown trivial member function"); 2603b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 2613b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 262fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall // Compute the function type we're calling. 263465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman const CXXMethodDecl *CalleeDecl = DevirtualizedMethod ? DevirtualizedMethod : MD; 264dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet const CGFunctionInfo *FInfo = 0; 265465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman if (const CXXDestructorDecl *Dtor = dyn_cast<CXXDestructorDecl>(CalleeDecl)) 266465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman FInfo = &CGM.getTypes().arrangeCXXDestructor(Dtor, 267de5d3c717684f3821b8db58037bc7140acf134aaJohn McCall Dtor_Complete); 268465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman else if (const CXXConstructorDecl *Ctor = dyn_cast<CXXConstructorDecl>(CalleeDecl)) 269465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman FInfo = &CGM.getTypes().arrangeCXXConstructorDeclaration(Ctor, 270465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman Ctor_Complete); 271dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet else 272465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman FInfo = &CGM.getTypes().arrangeCXXMethodDeclaration(CalleeDecl); 273fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall 274de5d3c717684f3821b8db58037bc7140acf134aaJohn McCall llvm::Type *Ty = CGM.getTypes().GetFunctionType(*FInfo); 275fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall 2763b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // C++ [class.virtual]p12: 2773b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Explicit qualification with the scope operator (5.1) suppresses the 2783b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // virtual call mechanism. 2793b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // 2803b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // We also don't emit a virtual call if the base expression has a record type 2813b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // because then we know what the type is. 282ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola bool UseVirtualCall = CanUseVirtualCall && !DevirtualizedMethod; 2830b4fe503ef00d9f8ea330850d3e3b303e9c7c876Rafael Espindola 2843b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson llvm::Value *Callee; 285fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall if (const CXXDestructorDecl *Dtor = dyn_cast<CXXDestructorDecl>(MD)) { 286fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall if (UseVirtualCall) { 2870f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov assert(CE->arg_begin() == CE->arg_end() && 2880f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov "Virtual destructor shouldn't have explicit parameters"); 2890f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov return CGM.getCXXABI().EmitVirtualDestructorCall(*this, Dtor, 2900f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov Dtor_Complete, 2910f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov CE->getExprLoc(), 2920f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov ReturnValue, This); 2933b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } else { 2947edf9e38b91917b661277601c0e448eef0eb2b56Richard Smith if (getLangOpts().AppleKext && 295ccd5259d33cbbdd6f5fbf7ccab4cb4a2702309eaFariborz Jahanian MD->isVirtual() && 296ccd5259d33cbbdd6f5fbf7ccab4cb4a2702309eaFariborz Jahanian ME->hasQualifier()) 297771c678c04f5f685b4f188ec6c2fd88ad0f7457fFariborz Jahanian Callee = BuildAppleKextVirtualCall(MD, ME->getQualifier(), Ty); 298ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola else if (!DevirtualizedMethod) 29912582bdc2e1fca260eb2437d87dab5302c37bab2Rafael Espindola Callee = CGM.GetAddrOfFunction(GlobalDecl(Dtor, Dtor_Complete), Ty); 3000b4fe503ef00d9f8ea330850d3e3b303e9c7c876Rafael Espindola else { 301ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola const CXXDestructorDecl *DDtor = 302ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola cast<CXXDestructorDecl>(DevirtualizedMethod); 3030b4fe503ef00d9f8ea330850d3e3b303e9c7c876Rafael Espindola Callee = CGM.GetAddrOfFunction(GlobalDecl(DDtor, Dtor_Complete), Ty); 3040b4fe503ef00d9f8ea330850d3e3b303e9c7c876Rafael Espindola } 3053b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 306dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet } else if (const CXXConstructorDecl *Ctor = 307dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet dyn_cast<CXXConstructorDecl>(MD)) { 308dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet Callee = CGM.GetAddrOfFunction(GlobalDecl(Ctor, Ctor_Complete), Ty); 309fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall } else if (UseVirtualCall) { 3102726267f094a0c1f5ac5b501ec5a9898c58876bfFariborz Jahanian Callee = BuildVirtualCall(MD, This, Ty); 3113b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } else { 3127edf9e38b91917b661277601c0e448eef0eb2b56Richard Smith if (getLangOpts().AppleKext && 313a50e33eb0ff7b73d44aebce88de3732583a7e960Fariborz Jahanian MD->isVirtual() && 3147ac0ff2a8791280102a557761dbb931deb21a1dcFariborz Jahanian ME->hasQualifier()) 315771c678c04f5f685b4f188ec6c2fd88ad0f7457fFariborz Jahanian Callee = BuildAppleKextVirtualCall(MD, ME->getQualifier(), Ty); 316ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola else if (!DevirtualizedMethod) 31712582bdc2e1fca260eb2437d87dab5302c37bab2Rafael Espindola Callee = CGM.GetAddrOfFunction(MD, Ty); 3180b4fe503ef00d9f8ea330850d3e3b303e9c7c876Rafael Espindola else { 319ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola Callee = CGM.GetAddrOfFunction(DevirtualizedMethod, Ty); 3200b4fe503ef00d9f8ea330850d3e3b303e9c7c876Rafael Espindola } 3213b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 3223b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3234def70d3040e73707c738f7c366737a986135edfRichard Smith return EmitCXXMemberCall(MD, CE->getExprLoc(), Callee, ReturnValue, This, 32459660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov /*ImplicitParam=*/0, QualType(), 32559660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov CE->arg_begin(), CE->arg_end()); 3263b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson} 3273b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3283b5ad2283c999f6edf7d42332a655447b7386b2eAnders CarlssonRValue 3293b5ad2283c999f6edf7d42332a655447b7386b2eAnders CarlssonCodeGenFunction::EmitCXXMemberPointerCallExpr(const CXXMemberCallExpr *E, 3303b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson ReturnValueSlot ReturnValue) { 3313b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const BinaryOperator *BO = 3323b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson cast<BinaryOperator>(E->getCallee()->IgnoreParens()); 3333b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const Expr *BaseExpr = BO->getLHS(); 3343b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const Expr *MemFnExpr = BO->getRHS(); 3353b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3363b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const MemberPointerType *MPT = 337864c041e118155c2b1ce0ba36942a3da5a4a055eJohn McCall MemFnExpr->getType()->castAs<MemberPointerType>(); 33893d557bc1867b7d7b102f87290194b4be7932c92John McCall 3393b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const FunctionProtoType *FPT = 340864c041e118155c2b1ce0ba36942a3da5a4a055eJohn McCall MPT->getPointeeType()->castAs<FunctionProtoType>(); 3413b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const CXXRecordDecl *RD = 3423b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson cast<CXXRecordDecl>(MPT->getClass()->getAs<RecordType>()->getDecl()); 3433b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3443b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Get the member function pointer. 345d608cdb7c044365cf4e8764ade1e11e99c176078John McCall llvm::Value *MemFnPtr = EmitScalarExpr(MemFnExpr); 3463b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3473b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Emit the 'this' pointer. 3483b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson llvm::Value *This; 3493b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3502de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (BO->getOpcode() == BO_PtrMemI) 3513b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson This = EmitScalarExpr(BaseExpr); 3523b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson else 3533b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson This = EmitLValue(BaseExpr).getAddress(); 3543b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3554def70d3040e73707c738f7c366737a986135edfRichard Smith EmitTypeCheck(TCK_MemberCall, E->getExprLoc(), This, 3564def70d3040e73707c738f7c366737a986135edfRichard Smith QualType(MPT->getClass(), 0)); 3572c9f87ca5cccbfdaad82762368af5b2323320653Richard Smith 35893d557bc1867b7d7b102f87290194b4be7932c92John McCall // Ask the ABI to load the callee. Note that This is modified. 35993d557bc1867b7d7b102f87290194b4be7932c92John McCall llvm::Value *Callee = 360d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall CGM.getCXXABI().EmitLoadOfMemberFunctionPointer(*this, This, MemFnPtr, MPT); 3613b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3623b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson CallArgList Args; 3633b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3643b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson QualType ThisType = 3653b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson getContext().getPointerType(getContext().getTagDeclType(RD)); 3663b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3673b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Push the this ptr. 36804c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman Args.add(RValue::get(This), ThisType); 3690f3d0970dcdf6cf17550b86838dff12813968dbcJohn McCall 3700f3d0970dcdf6cf17550b86838dff12813968dbcJohn McCall RequiredArgs required = RequiredArgs::forPrototypePlus(FPT, 1); 3713b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3723b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // And the rest of the call args 3733b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson EmitCallArgs(Args, FPT, E->arg_begin(), E->arg_end()); 3740f3d0970dcdf6cf17550b86838dff12813968dbcJohn McCall return EmitCall(CGM.getTypes().arrangeCXXMethodCall(Args, FPT, required), Callee, 3759c6082fe89c61af697f017aa80937581cc2128d8Tilmann Scheller ReturnValue, Args); 3763b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson} 3773b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3783b5ad2283c999f6edf7d42332a655447b7386b2eAnders CarlssonRValue 3793b5ad2283c999f6edf7d42332a655447b7386b2eAnders CarlssonCodeGenFunction::EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E, 3803b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const CXXMethodDecl *MD, 3813b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson ReturnValueSlot ReturnValue) { 3823b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson assert(MD->isInstance() && 3833b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson "Trying to emit a member call expr on a static method!"); 3840e800c9c20d1a658a91096c756c4a4a9e90264fcJohn McCall LValue LV = EmitLValue(E->getArg(0)); 3850e800c9c20d1a658a91096c756c4a4a9e90264fcJohn McCall llvm::Value *This = LV.getAddress(); 3860e800c9c20d1a658a91096c756c4a4a9e90264fcJohn McCall 387b2b5658a8e4ad566303ec98caceaa3485e7635f7Douglas Gregor if ((MD->isCopyAssignmentOperator() || MD->isMoveAssignmentOperator()) && 388b2b5658a8e4ad566303ec98caceaa3485e7635f7Douglas Gregor MD->isTrivial()) { 389b2b5658a8e4ad566303ec98caceaa3485e7635f7Douglas Gregor llvm::Value *Src = EmitLValue(E->getArg(1)).getAddress(); 390b2b5658a8e4ad566303ec98caceaa3485e7635f7Douglas Gregor QualType Ty = E->getType(); 3916cacae8bf9597b8124cd40aedc189c04484e1990Benjamin Kramer EmitAggregateAssign(This, Src, Ty); 392b2b5658a8e4ad566303ec98caceaa3485e7635f7Douglas Gregor return RValue::get(This); 3933b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 3943b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 395a2447e0d1e28669cd637204a871f15b1215277fdAnders Carlsson llvm::Value *Callee = EmitCXXOperatorMemberCallee(E, MD, This); 3964def70d3040e73707c738f7c366737a986135edfRichard Smith return EmitCXXMemberCall(MD, E->getExprLoc(), Callee, ReturnValue, This, 39759660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov /*ImplicitParam=*/0, QualType(), 39859660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov E->arg_begin() + 1, E->arg_end()); 3993b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson} 4003b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 4016c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter CollingbourneRValue CodeGenFunction::EmitCUDAKernelCallExpr(const CUDAKernelCallExpr *E, 4026c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne ReturnValueSlot ReturnValue) { 4036c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne return CGM.getCUDARuntime().EmitCUDAKernelCallExpr(*this, E, ReturnValue); 4046c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne} 4056c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne 4062ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedmanstatic void EmitNullBaseClassInitialization(CodeGenFunction &CGF, 4072ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::Value *DestPtr, 4082ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman const CXXRecordDecl *Base) { 4092ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman if (Base->isEmpty()) 4102ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman return; 4112ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 4122ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman DestPtr = CGF.EmitCastToVoidPtr(DestPtr); 4132ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 4142ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman const ASTRecordLayout &Layout = CGF.getContext().getASTRecordLayout(Base); 4152ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman CharUnits Size = Layout.getNonVirtualSize(); 4162ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman CharUnits Align = Layout.getNonVirtualAlign(); 4172ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 4182ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::Value *SizeVal = CGF.CGM.getSize(Size); 4192ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 4202ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // If the type contains a pointer to data member we can't memset it to zero. 4212ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // Instead, create a null constant and copy it to the destination. 4222ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // TODO: there are other patterns besides zero that we can usefully memset, 4232ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // like -1, which happens to be the pattern used by member-pointers. 4242ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // TODO: isZeroInitializable can be over-conservative in the case where a 4252ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // virtual base contains a member pointer. 4262ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman if (!CGF.CGM.getTypes().isZeroInitializable(Base)) { 4272ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::Constant *NullConstant = CGF.CGM.EmitNullConstantForBase(Base); 4282ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 4292ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::GlobalVariable *NullVariable = 4302ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman new llvm::GlobalVariable(CGF.CGM.getModule(), NullConstant->getType(), 4312ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman /*isConstant=*/true, 4322ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::GlobalVariable::PrivateLinkage, 4332ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman NullConstant, Twine()); 4342ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman NullVariable->setAlignment(Align.getQuantity()); 4352ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::Value *SrcPtr = CGF.EmitCastToVoidPtr(NullVariable); 4362ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 4372ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // Get and call the appropriate llvm.memcpy overload. 4382ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman CGF.Builder.CreateMemCpy(DestPtr, SrcPtr, SizeVal, Align.getQuantity()); 4392ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman return; 4402ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman } 4412ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 4422ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // Otherwise, just memset the whole thing to zero. This is legal 4432ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // because in LLVM, all default initializers (other than the ones we just 4442ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // handled above) are guaranteed to have a bit pattern of all zeros. 4452ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman CGF.Builder.CreateMemSet(DestPtr, CGF.Builder.getInt8(0), SizeVal, 4462ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman Align.getQuantity()); 4472ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman} 4482ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 4493b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlssonvoid 450558d2abc7f9fd6801cc7677200992313ae90b5d8John McCallCodeGenFunction::EmitCXXConstructExpr(const CXXConstructExpr *E, 451558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall AggValueSlot Dest) { 452558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall assert(!Dest.isIgnored() && "Must have a destination!"); 4533b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const CXXConstructorDecl *CD = E->getConstructor(); 454759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor 455759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor // If we require zero initialization before (or instead of) calling the 456759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor // constructor, as can be the case with a non-user-provided default 457657baf19ca8a48a926bd3bc148b6ad1b17e53199Argyrios Kyrtzidis // constructor, emit the zero initialization now, unless destination is 458657baf19ca8a48a926bd3bc148b6ad1b17e53199Argyrios Kyrtzidis // already zeroed. 4592ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman if (E->requiresZeroInitialization() && !Dest.isZeroed()) { 4602ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman switch (E->getConstructionKind()) { 4612ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman case CXXConstructExpr::CK_Delegating: 4622ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman case CXXConstructExpr::CK_Complete: 4632ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman EmitNullInitialization(Dest.getAddr(), E->getType()); 4642ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman break; 4652ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman case CXXConstructExpr::CK_VirtualBase: 4662ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman case CXXConstructExpr::CK_NonVirtualBase: 4672ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman EmitNullBaseClassInitialization(*this, Dest.getAddr(), CD->getParent()); 4682ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman break; 4692ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman } 4702ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman } 471759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor 472759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor // If this is a call to a trivial default constructor, do nothing. 473759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor if (CD->isTrivial() && CD->isDefaultConstructor()) 474759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor return; 475759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor 476fc1e6c79bbfe0e9a58bb792996d51f42e36e3d6aJohn McCall // Elide the constructor if we're constructing from a temporary. 477fc1e6c79bbfe0e9a58bb792996d51f42e36e3d6aJohn McCall // The temporary check is required because Sema sets this on NRVO 478fc1e6c79bbfe0e9a58bb792996d51f42e36e3d6aJohn McCall // returns. 4797edf9e38b91917b661277601c0e448eef0eb2b56Richard Smith if (getLangOpts().ElideConstructors && E->isElidable()) { 480fc1e6c79bbfe0e9a58bb792996d51f42e36e3d6aJohn McCall assert(getContext().hasSameUnqualifiedType(E->getType(), 481fc1e6c79bbfe0e9a58bb792996d51f42e36e3d6aJohn McCall E->getArg(0)->getType())); 482558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall if (E->getArg(0)->isTemporaryObject(getContext(), CD->getParent())) { 483558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall EmitAggExpr(E->getArg(0), Dest); 4843c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor return; 4853c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor } 4863b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 487759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor 488c3c0766277cd64bf117450a1519c9cf762d994d4John McCall if (const ConstantArrayType *arrayType 489c3c0766277cd64bf117450a1519c9cf762d994d4John McCall = getContext().getAsConstantArrayType(E->getType())) { 490c3c0766277cd64bf117450a1519c9cf762d994d4John McCall EmitCXXAggrConstructorCall(CD, arrayType, Dest.getAddr(), 4913b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson E->arg_begin(), E->arg_end()); 492c3c0766277cd64bf117450a1519c9cf762d994d4John McCall } else { 4936bd2f6ad857949d4dfb6e75e0760c61950b917cfCameron Esfahani CXXCtorType Type = Ctor_Complete; 494d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt bool ForVirtualBase = false; 495378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor bool Delegating = false; 496378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor 497d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt switch (E->getConstructionKind()) { 498d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt case CXXConstructExpr::CK_Delegating: 499059ce0d92eb5a7da900ae735dc0a2ea3d64f4b0bSean Hunt // We should be emitting a constructor; GlobalDecl will assert this 500059ce0d92eb5a7da900ae735dc0a2ea3d64f4b0bSean Hunt Type = CurGD.getCtorType(); 501378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor Delegating = true; 502d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt break; 503059ce0d92eb5a7da900ae735dc0a2ea3d64f4b0bSean Hunt 504d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt case CXXConstructExpr::CK_Complete: 505d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt Type = Ctor_Complete; 506d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt break; 507d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt 508d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt case CXXConstructExpr::CK_VirtualBase: 509d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt ForVirtualBase = true; 510d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt // fall-through 511d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt 512d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt case CXXConstructExpr::CK_NonVirtualBase: 513d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt Type = Ctor_Base; 514d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt } 515155ed4a23366f4514befb1c9f5f89d16f8b8b6dbAnders Carlsson 5163b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Call the constructor. 517378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor EmitCXXConstructorCall(CD, Type, ForVirtualBase, Delegating, Dest.getAddr(), 5183b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson E->arg_begin(), E->arg_end()); 519155ed4a23366f4514befb1c9f5f89d16f8b8b6dbAnders Carlsson } 5203b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson} 5213b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 52234999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanianvoid 52334999876e215b22febc240b1a6dc054215d12f9cFariborz JahanianCodeGenFunction::EmitSynthesizedCXXCopyCtor(llvm::Value *Dest, 52434999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian llvm::Value *Src, 525830937bc1100fba7682f7c32c40512085870f50cFariborz Jahanian const Expr *Exp) { 5264765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall if (const ExprWithCleanups *E = dyn_cast<ExprWithCleanups>(Exp)) 52734999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian Exp = E->getSubExpr(); 52834999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian assert(isa<CXXConstructExpr>(Exp) && 52934999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian "EmitSynthesizedCXXCopyCtor - unknown copy ctor expr"); 53034999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian const CXXConstructExpr* E = cast<CXXConstructExpr>(Exp); 53134999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian const CXXConstructorDecl *CD = E->getConstructor(); 53234999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian RunCleanupsScope Scope(*this); 53334999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian 53434999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian // If we require zero initialization before (or instead of) calling the 53534999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian // constructor, as can be the case with a non-user-provided default 53634999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian // constructor, emit the zero initialization now. 53734999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian // FIXME. Do I still need this for a copy ctor synthesis? 53834999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian if (E->requiresZeroInitialization()) 53934999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian EmitNullInitialization(Dest, E->getType()); 54034999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian 541858a546d8fe73b07f2296313bef2e30445ea164bChandler Carruth assert(!getContext().getAsConstantArrayType(E->getType()) 542858a546d8fe73b07f2296313bef2e30445ea164bChandler Carruth && "EmitSynthesizedCXXCopyCtor - Copied-in Array"); 54334999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian EmitSynthesizedCXXCopyCtorCall(CD, Dest, Src, 54434999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian E->arg_begin(), E->arg_end()); 54534999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian} 54634999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian 5471e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCallstatic CharUnits CalculateCookiePadding(CodeGenFunction &CGF, 5481e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const CXXNewExpr *E) { 549871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson if (!E->isArray()) 550caf647c33ad74621c352c21d6c50d149ba49e89dKen Dyck return CharUnits::Zero(); 551871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson 552b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // No cookie is required if the operator new[] being used is the 553b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // reserved placement operator new[]. 554b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall if (E->getOperatorNew()->isReservedGlobalPlacementOperator()) 5555172ed92b42f0bc6a022542a08f7b18af821bcb3John McCall return CharUnits::Zero(); 5565172ed92b42f0bc6a022542a08f7b18af821bcb3John McCall 5576ec278d1a354517e20f13a877481453ee7940c78John McCall return CGF.CGM.getCXXABI().GetArrayCookieSize(E); 558a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson} 559a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 5607d16627081caede9691a6f46b796da4073ac14adJohn McCallstatic llvm::Value *EmitCXXNewAllocSize(CodeGenFunction &CGF, 5617d16627081caede9691a6f46b796da4073ac14adJohn McCall const CXXNewExpr *e, 5629203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl unsigned minElements, 5637d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *&numElements, 5647d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *&sizeWithoutCookie) { 5657d16627081caede9691a6f46b796da4073ac14adJohn McCall QualType type = e->getAllocatedType(); 5667d16627081caede9691a6f46b796da4073ac14adJohn McCall 5677d16627081caede9691a6f46b796da4073ac14adJohn McCall if (!e->isArray()) { 5687d16627081caede9691a6f46b796da4073ac14adJohn McCall CharUnits typeSize = CGF.getContext().getTypeSizeInChars(type); 5697d16627081caede9691a6f46b796da4073ac14adJohn McCall sizeWithoutCookie 5707d16627081caede9691a6f46b796da4073ac14adJohn McCall = llvm::ConstantInt::get(CGF.SizeTy, typeSize.getQuantity()); 5717d16627081caede9691a6f46b796da4073ac14adJohn McCall return sizeWithoutCookie; 57259174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor } 573a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 5747d16627081caede9691a6f46b796da4073ac14adJohn McCall // The width of size_t. 5757d16627081caede9691a6f46b796da4073ac14adJohn McCall unsigned sizeWidth = CGF.SizeTy->getBitWidth(); 5767d16627081caede9691a6f46b796da4073ac14adJohn McCall 5771e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Figure out the cookie size. 5787d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt cookieSize(sizeWidth, 5797d16627081caede9691a6f46b796da4073ac14adJohn McCall CalculateCookiePadding(CGF, e).getQuantity()); 5801e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 581a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson // Emit the array size expression. 582e7ab92e1d62f9c243bbd1f42f72a7b3c2666d33eArgyrios Kyrtzidis // We multiply the size of all dimensions for NumElements. 583e7ab92e1d62f9c243bbd1f42f72a7b3c2666d33eArgyrios Kyrtzidis // e.g for 'int[2][3]', ElemType is 'int' and NumElements is 6. 5847d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = CGF.EmitScalarExpr(e->getArraySize()); 5857d16627081caede9691a6f46b796da4073ac14adJohn McCall assert(isa<llvm::IntegerType>(numElements->getType())); 5867d16627081caede9691a6f46b796da4073ac14adJohn McCall 5877d16627081caede9691a6f46b796da4073ac14adJohn McCall // The number of elements can be have an arbitrary integer type; 5887d16627081caede9691a6f46b796da4073ac14adJohn McCall // essentially, we need to multiply it by a constant factor, add a 5897d16627081caede9691a6f46b796da4073ac14adJohn McCall // cookie size, and verify that the result is representable as a 5907d16627081caede9691a6f46b796da4073ac14adJohn McCall // size_t. That's just a gloss, though, and it's wrong in one 5917d16627081caede9691a6f46b796da4073ac14adJohn McCall // important way: if the count is negative, it's an error even if 5927d16627081caede9691a6f46b796da4073ac14adJohn McCall // the cookie size would bring the total size >= 0. 593575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor bool isSigned 594575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor = e->getArraySize()->getType()->isSignedIntegerOrEnumerationType(); 5952acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::IntegerType *numElementsType 5967d16627081caede9691a6f46b796da4073ac14adJohn McCall = cast<llvm::IntegerType>(numElements->getType()); 5977d16627081caede9691a6f46b796da4073ac14adJohn McCall unsigned numElementsWidth = numElementsType->getBitWidth(); 5987d16627081caede9691a6f46b796da4073ac14adJohn McCall 5997d16627081caede9691a6f46b796da4073ac14adJohn McCall // Compute the constant factor. 6007d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt arraySizeMultiplier(sizeWidth, 1); 601e7ab92e1d62f9c243bbd1f42f72a7b3c2666d33eArgyrios Kyrtzidis while (const ConstantArrayType *CAT 6027d16627081caede9691a6f46b796da4073ac14adJohn McCall = CGF.getContext().getAsConstantArrayType(type)) { 6037d16627081caede9691a6f46b796da4073ac14adJohn McCall type = CAT->getElementType(); 6047d16627081caede9691a6f46b796da4073ac14adJohn McCall arraySizeMultiplier *= CAT->getSize(); 605e7ab92e1d62f9c243bbd1f42f72a7b3c2666d33eArgyrios Kyrtzidis } 606e7ab92e1d62f9c243bbd1f42f72a7b3c2666d33eArgyrios Kyrtzidis 6077d16627081caede9691a6f46b796da4073ac14adJohn McCall CharUnits typeSize = CGF.getContext().getTypeSizeInChars(type); 6087d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt typeSizeMultiplier(sizeWidth, typeSize.getQuantity()); 6097d16627081caede9691a6f46b796da4073ac14adJohn McCall typeSizeMultiplier *= arraySizeMultiplier; 6107d16627081caede9691a6f46b796da4073ac14adJohn McCall 6117d16627081caede9691a6f46b796da4073ac14adJohn McCall // This will be a size_t. 6127d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *size; 6136c552c1d5f47fbba00e6268d96a26ad026f2da2aChris Lattner 614806941eab5e1d62d7676e5cdc0e1d9e397ea78b4Chris Lattner // If someone is doing 'new int[42]' there is no need to do a dynamic check. 615806941eab5e1d62d7676e5cdc0e1d9e397ea78b4Chris Lattner // Don't bloat the -O0 code. 6167d16627081caede9691a6f46b796da4073ac14adJohn McCall if (llvm::ConstantInt *numElementsC = 6177d16627081caede9691a6f46b796da4073ac14adJohn McCall dyn_cast<llvm::ConstantInt>(numElements)) { 6187d16627081caede9691a6f46b796da4073ac14adJohn McCall const llvm::APInt &count = numElementsC->getValue(); 6197d16627081caede9691a6f46b796da4073ac14adJohn McCall 6207d16627081caede9691a6f46b796da4073ac14adJohn McCall bool hasAnyOverflow = false; 6217d16627081caede9691a6f46b796da4073ac14adJohn McCall 6227d16627081caede9691a6f46b796da4073ac14adJohn McCall // If 'count' was a negative number, it's an overflow. 6237d16627081caede9691a6f46b796da4073ac14adJohn McCall if (isSigned && count.isNegative()) 6247d16627081caede9691a6f46b796da4073ac14adJohn McCall hasAnyOverflow = true; 6257d16627081caede9691a6f46b796da4073ac14adJohn McCall 6267d16627081caede9691a6f46b796da4073ac14adJohn McCall // We want to do all this arithmetic in size_t. If numElements is 6277d16627081caede9691a6f46b796da4073ac14adJohn McCall // wider than that, check whether it's already too big, and if so, 6287d16627081caede9691a6f46b796da4073ac14adJohn McCall // overflow. 6297d16627081caede9691a6f46b796da4073ac14adJohn McCall else if (numElementsWidth > sizeWidth && 6307d16627081caede9691a6f46b796da4073ac14adJohn McCall numElementsWidth - sizeWidth > count.countLeadingZeros()) 6317d16627081caede9691a6f46b796da4073ac14adJohn McCall hasAnyOverflow = true; 6327d16627081caede9691a6f46b796da4073ac14adJohn McCall 6337d16627081caede9691a6f46b796da4073ac14adJohn McCall // Okay, compute a count at the right width. 6347d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt adjustedCount = count.zextOrTrunc(sizeWidth); 6357d16627081caede9691a6f46b796da4073ac14adJohn McCall 6369203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // If there is a brace-initializer, we cannot allocate fewer elements than 6379203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // there are initializers. If we do, that's treated like an overflow. 6389203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (adjustedCount.ult(minElements)) 6399203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl hasAnyOverflow = true; 6409203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 6417d16627081caede9691a6f46b796da4073ac14adJohn McCall // Scale numElements by that. This might overflow, but we don't 6427d16627081caede9691a6f46b796da4073ac14adJohn McCall // care because it only overflows if allocationSize does, too, and 6437d16627081caede9691a6f46b796da4073ac14adJohn McCall // if that overflows then we shouldn't use this. 6447d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = llvm::ConstantInt::get(CGF.SizeTy, 6457d16627081caede9691a6f46b796da4073ac14adJohn McCall adjustedCount * arraySizeMultiplier); 6467d16627081caede9691a6f46b796da4073ac14adJohn McCall 6477d16627081caede9691a6f46b796da4073ac14adJohn McCall // Compute the size before cookie, and track whether it overflowed. 6487d16627081caede9691a6f46b796da4073ac14adJohn McCall bool overflow; 6497d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt allocationSize 6507d16627081caede9691a6f46b796da4073ac14adJohn McCall = adjustedCount.umul_ov(typeSizeMultiplier, overflow); 6517d16627081caede9691a6f46b796da4073ac14adJohn McCall hasAnyOverflow |= overflow; 6527d16627081caede9691a6f46b796da4073ac14adJohn McCall 6537d16627081caede9691a6f46b796da4073ac14adJohn McCall // Add in the cookie, and check whether it's overflowed. 6547d16627081caede9691a6f46b796da4073ac14adJohn McCall if (cookieSize != 0) { 6557d16627081caede9691a6f46b796da4073ac14adJohn McCall // Save the current size without a cookie. This shouldn't be 6567d16627081caede9691a6f46b796da4073ac14adJohn McCall // used if there was overflow. 6577d16627081caede9691a6f46b796da4073ac14adJohn McCall sizeWithoutCookie = llvm::ConstantInt::get(CGF.SizeTy, allocationSize); 6587d16627081caede9691a6f46b796da4073ac14adJohn McCall 6597d16627081caede9691a6f46b796da4073ac14adJohn McCall allocationSize = allocationSize.uadd_ov(cookieSize, overflow); 6607d16627081caede9691a6f46b796da4073ac14adJohn McCall hasAnyOverflow |= overflow; 6611e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 6627d16627081caede9691a6f46b796da4073ac14adJohn McCall 6637d16627081caede9691a6f46b796da4073ac14adJohn McCall // On overflow, produce a -1 so operator new will fail. 6647d16627081caede9691a6f46b796da4073ac14adJohn McCall if (hasAnyOverflow) { 6657d16627081caede9691a6f46b796da4073ac14adJohn McCall size = llvm::Constant::getAllOnesValue(CGF.SizeTy); 666806941eab5e1d62d7676e5cdc0e1d9e397ea78b4Chris Lattner } else { 6677d16627081caede9691a6f46b796da4073ac14adJohn McCall size = llvm::ConstantInt::get(CGF.SizeTy, allocationSize); 668806941eab5e1d62d7676e5cdc0e1d9e397ea78b4Chris Lattner } 6691e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 6707d16627081caede9691a6f46b796da4073ac14adJohn McCall // Otherwise, we might need to use the overflow intrinsics. 6717d16627081caede9691a6f46b796da4073ac14adJohn McCall } else { 6729203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // There are up to five conditions we need to test for: 6737d16627081caede9691a6f46b796da4073ac14adJohn McCall // 1) if isSigned, we need to check whether numElements is negative; 6747d16627081caede9691a6f46b796da4073ac14adJohn McCall // 2) if numElementsWidth > sizeWidth, we need to check whether 6757d16627081caede9691a6f46b796da4073ac14adJohn McCall // numElements is larger than something representable in size_t; 6769203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // 3) if minElements > 0, we need to check whether numElements is smaller 6779203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // than that. 6789203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // 4) we need to compute 6797d16627081caede9691a6f46b796da4073ac14adJohn McCall // sizeWithoutCookie := numElements * typeSizeMultiplier 6807d16627081caede9691a6f46b796da4073ac14adJohn McCall // and check whether it overflows; and 6819203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // 5) if we need a cookie, we need to compute 6827d16627081caede9691a6f46b796da4073ac14adJohn McCall // size := sizeWithoutCookie + cookieSize 6837d16627081caede9691a6f46b796da4073ac14adJohn McCall // and check whether it overflows. 6847d16627081caede9691a6f46b796da4073ac14adJohn McCall 6857d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *hasOverflow = 0; 6867d16627081caede9691a6f46b796da4073ac14adJohn McCall 6877d16627081caede9691a6f46b796da4073ac14adJohn McCall // If numElementsWidth > sizeWidth, then one way or another, we're 6887d16627081caede9691a6f46b796da4073ac14adJohn McCall // going to have to do a comparison for (2), and this happens to 6897d16627081caede9691a6f46b796da4073ac14adJohn McCall // take care of (1), too. 6907d16627081caede9691a6f46b796da4073ac14adJohn McCall if (numElementsWidth > sizeWidth) { 6917d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt threshold(numElementsWidth, 1); 6927d16627081caede9691a6f46b796da4073ac14adJohn McCall threshold <<= sizeWidth; 6937d16627081caede9691a6f46b796da4073ac14adJohn McCall 6947d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *thresholdV 6957d16627081caede9691a6f46b796da4073ac14adJohn McCall = llvm::ConstantInt::get(numElementsType, threshold); 6967d16627081caede9691a6f46b796da4073ac14adJohn McCall 6977d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = CGF.Builder.CreateICmpUGE(numElements, thresholdV); 6987d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = CGF.Builder.CreateTrunc(numElements, CGF.SizeTy); 6997d16627081caede9691a6f46b796da4073ac14adJohn McCall 7007d16627081caede9691a6f46b796da4073ac14adJohn McCall // Otherwise, if we're signed, we want to sext up to size_t. 7017d16627081caede9691a6f46b796da4073ac14adJohn McCall } else if (isSigned) { 7027d16627081caede9691a6f46b796da4073ac14adJohn McCall if (numElementsWidth < sizeWidth) 7037d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = CGF.Builder.CreateSExt(numElements, CGF.SizeTy); 7047d16627081caede9691a6f46b796da4073ac14adJohn McCall 7057d16627081caede9691a6f46b796da4073ac14adJohn McCall // If there's a non-1 type size multiplier, then we can do the 7067d16627081caede9691a6f46b796da4073ac14adJohn McCall // signedness check at the same time as we do the multiply 7077d16627081caede9691a6f46b796da4073ac14adJohn McCall // because a negative number times anything will cause an 7089203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // unsigned overflow. Otherwise, we have to do it here. But at least 7099203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // in this case, we can subsume the >= minElements check. 7107d16627081caede9691a6f46b796da4073ac14adJohn McCall if (typeSizeMultiplier == 1) 7117d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = CGF.Builder.CreateICmpSLT(numElements, 7129203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl llvm::ConstantInt::get(CGF.SizeTy, minElements)); 7137d16627081caede9691a6f46b796da4073ac14adJohn McCall 7147d16627081caede9691a6f46b796da4073ac14adJohn McCall // Otherwise, zext up to size_t if necessary. 7157d16627081caede9691a6f46b796da4073ac14adJohn McCall } else if (numElementsWidth < sizeWidth) { 7167d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = CGF.Builder.CreateZExt(numElements, CGF.SizeTy); 7177d16627081caede9691a6f46b796da4073ac14adJohn McCall } 7181e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 7197d16627081caede9691a6f46b796da4073ac14adJohn McCall assert(numElements->getType() == CGF.SizeTy); 7201e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 7219203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (minElements) { 7229203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // Don't allow allocation of fewer elements than we have initializers. 7239203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (!hasOverflow) { 7249203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl hasOverflow = CGF.Builder.CreateICmpULT(numElements, 7259203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl llvm::ConstantInt::get(CGF.SizeTy, minElements)); 7269203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } else if (numElementsWidth > sizeWidth) { 7279203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // The other existing overflow subsumes this check. 7289203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // We do an unsigned comparison, since any signed value < -1 is 7299203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // taken care of either above or below. 7309203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl hasOverflow = CGF.Builder.CreateOr(hasOverflow, 7319203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl CGF.Builder.CreateICmpULT(numElements, 7329203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl llvm::ConstantInt::get(CGF.SizeTy, minElements))); 7339203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } 7349203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } 7359203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 7367d16627081caede9691a6f46b796da4073ac14adJohn McCall size = numElements; 7371e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 7387d16627081caede9691a6f46b796da4073ac14adJohn McCall // Multiply by the type size if necessary. This multiplier 7397d16627081caede9691a6f46b796da4073ac14adJohn McCall // includes all the factors for nested arrays. 7407d16627081caede9691a6f46b796da4073ac14adJohn McCall // 7417d16627081caede9691a6f46b796da4073ac14adJohn McCall // This step also causes numElements to be scaled up by the 7427d16627081caede9691a6f46b796da4073ac14adJohn McCall // nested-array factor if necessary. Overflow on this computation 7437d16627081caede9691a6f46b796da4073ac14adJohn McCall // can be ignored because the result shouldn't be used if 7447d16627081caede9691a6f46b796da4073ac14adJohn McCall // allocation fails. 7457d16627081caede9691a6f46b796da4073ac14adJohn McCall if (typeSizeMultiplier != 1) { 7467d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *umul_with_overflow 7478dd55a3c3b28d195717c87bbc60e765951d408feBenjamin Kramer = CGF.CGM.getIntrinsic(llvm::Intrinsic::umul_with_overflow, CGF.SizeTy); 7487d16627081caede9691a6f46b796da4073ac14adJohn McCall 7497d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *tsmV = 7507d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::ConstantInt::get(CGF.SizeTy, typeSizeMultiplier); 7517d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *result = 7527d16627081caede9691a6f46b796da4073ac14adJohn McCall CGF.Builder.CreateCall2(umul_with_overflow, size, tsmV); 7537d16627081caede9691a6f46b796da4073ac14adJohn McCall 7547d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *overflowed = CGF.Builder.CreateExtractValue(result, 1); 7557d16627081caede9691a6f46b796da4073ac14adJohn McCall if (hasOverflow) 7567d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = CGF.Builder.CreateOr(hasOverflow, overflowed); 7577d16627081caede9691a6f46b796da4073ac14adJohn McCall else 7587d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = overflowed; 7597d16627081caede9691a6f46b796da4073ac14adJohn McCall 7607d16627081caede9691a6f46b796da4073ac14adJohn McCall size = CGF.Builder.CreateExtractValue(result, 0); 7617d16627081caede9691a6f46b796da4073ac14adJohn McCall 7627d16627081caede9691a6f46b796da4073ac14adJohn McCall // Also scale up numElements by the array size multiplier. 7637d16627081caede9691a6f46b796da4073ac14adJohn McCall if (arraySizeMultiplier != 1) { 7647d16627081caede9691a6f46b796da4073ac14adJohn McCall // If the base element type size is 1, then we can re-use the 7657d16627081caede9691a6f46b796da4073ac14adJohn McCall // multiply we just did. 7667d16627081caede9691a6f46b796da4073ac14adJohn McCall if (typeSize.isOne()) { 7677d16627081caede9691a6f46b796da4073ac14adJohn McCall assert(arraySizeMultiplier == typeSizeMultiplier); 7687d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = size; 7697d16627081caede9691a6f46b796da4073ac14adJohn McCall 7707d16627081caede9691a6f46b796da4073ac14adJohn McCall // Otherwise we need a separate multiply. 7717d16627081caede9691a6f46b796da4073ac14adJohn McCall } else { 7727d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *asmV = 7737d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::ConstantInt::get(CGF.SizeTy, arraySizeMultiplier); 7747d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = CGF.Builder.CreateMul(numElements, asmV); 7757d16627081caede9691a6f46b796da4073ac14adJohn McCall } 7767d16627081caede9691a6f46b796da4073ac14adJohn McCall } 7777d16627081caede9691a6f46b796da4073ac14adJohn McCall } else { 7787d16627081caede9691a6f46b796da4073ac14adJohn McCall // numElements doesn't need to be scaled. 7797d16627081caede9691a6f46b796da4073ac14adJohn McCall assert(arraySizeMultiplier == 1); 7801e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 7817d16627081caede9691a6f46b796da4073ac14adJohn McCall 7827d16627081caede9691a6f46b796da4073ac14adJohn McCall // Add in the cookie size if necessary. 7837d16627081caede9691a6f46b796da4073ac14adJohn McCall if (cookieSize != 0) { 7847d16627081caede9691a6f46b796da4073ac14adJohn McCall sizeWithoutCookie = size; 7857d16627081caede9691a6f46b796da4073ac14adJohn McCall 7867d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *uadd_with_overflow 7878dd55a3c3b28d195717c87bbc60e765951d408feBenjamin Kramer = CGF.CGM.getIntrinsic(llvm::Intrinsic::uadd_with_overflow, CGF.SizeTy); 7887d16627081caede9691a6f46b796da4073ac14adJohn McCall 7897d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *cookieSizeV = llvm::ConstantInt::get(CGF.SizeTy, cookieSize); 7907d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *result = 7917d16627081caede9691a6f46b796da4073ac14adJohn McCall CGF.Builder.CreateCall2(uadd_with_overflow, size, cookieSizeV); 7927d16627081caede9691a6f46b796da4073ac14adJohn McCall 7937d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *overflowed = CGF.Builder.CreateExtractValue(result, 1); 7947d16627081caede9691a6f46b796da4073ac14adJohn McCall if (hasOverflow) 7957d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = CGF.Builder.CreateOr(hasOverflow, overflowed); 7967d16627081caede9691a6f46b796da4073ac14adJohn McCall else 7977d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = overflowed; 7981e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 7997d16627081caede9691a6f46b796da4073ac14adJohn McCall size = CGF.Builder.CreateExtractValue(result, 0); 8001e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 8011e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 8027d16627081caede9691a6f46b796da4073ac14adJohn McCall // If we had any possibility of dynamic overflow, make a select to 8037d16627081caede9691a6f46b796da4073ac14adJohn McCall // overwrite 'size' with an all-ones value, which should cause 8047d16627081caede9691a6f46b796da4073ac14adJohn McCall // operator new to throw. 8057d16627081caede9691a6f46b796da4073ac14adJohn McCall if (hasOverflow) 8067d16627081caede9691a6f46b796da4073ac14adJohn McCall size = CGF.Builder.CreateSelect(hasOverflow, 8077d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Constant::getAllOnesValue(CGF.SizeTy), 8087d16627081caede9691a6f46b796da4073ac14adJohn McCall size); 809806941eab5e1d62d7676e5cdc0e1d9e397ea78b4Chris Lattner } 8101e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 8117d16627081caede9691a6f46b796da4073ac14adJohn McCall if (cookieSize == 0) 8127d16627081caede9691a6f46b796da4073ac14adJohn McCall sizeWithoutCookie = size; 8131e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall else 8147d16627081caede9691a6f46b796da4073ac14adJohn McCall assert(sizeWithoutCookie && "didn't set sizeWithoutCookie?"); 8151e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 8167d16627081caede9691a6f46b796da4073ac14adJohn McCall return size; 817a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson} 818a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 8199203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redlstatic void StoreAnyExprIntoOneUnit(CodeGenFunction &CGF, const Expr *Init, 8209203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl QualType AllocType, llvm::Value *NewPtr) { 82191a16fa3265686b90054715eea504d9b4a13438bDaniel Dunbar 822d7722d9d76a851e7897f4127626616d3b1b8e530Eli Friedman CharUnits Alignment = CGF.getContext().getTypeAlignInChars(AllocType); 8239d232c884ea9872d6555df0fd7359699819bc1f1John McCall switch (CGF.getEvaluationKind(AllocType)) { 8249d232c884ea9872d6555df0fd7359699819bc1f1John McCall case TEK_Scalar: 825d7722d9d76a851e7897f4127626616d3b1b8e530Eli Friedman CGF.EmitScalarInit(Init, 0, CGF.MakeAddrLValue(NewPtr, AllocType, 8266da2c716017d5c8530ec99779524491ebc5dadb8Eli Friedman Alignment), 827a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall false); 8289d232c884ea9872d6555df0fd7359699819bc1f1John McCall return; 8299d232c884ea9872d6555df0fd7359699819bc1f1John McCall case TEK_Complex: 8309d232c884ea9872d6555df0fd7359699819bc1f1John McCall CGF.EmitComplexExprIntoLValue(Init, CGF.MakeAddrLValue(NewPtr, AllocType, 8319d232c884ea9872d6555df0fd7359699819bc1f1John McCall Alignment), 8329d232c884ea9872d6555df0fd7359699819bc1f1John McCall /*isInit*/ true); 8339d232c884ea9872d6555df0fd7359699819bc1f1John McCall return; 8349d232c884ea9872d6555df0fd7359699819bc1f1John McCall case TEK_Aggregate: { 835558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall AggValueSlot Slot 836f394078fde147dcf27e9b6a7965517388d64dcb6Eli Friedman = AggValueSlot::forAddr(NewPtr, Alignment, AllocType.getQualifiers(), 8377c2349be2d11143a2e59a167fd43362a3bf4585eJohn McCall AggValueSlot::IsDestructed, 8384418439220a8f8e0b1deffdccce2354854c702f5John McCall AggValueSlot::DoesNotNeedGCBarriers, 839649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier AggValueSlot::IsNotAliased); 840558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall CGF.EmitAggExpr(Init, Slot); 841972edf0534d8a50f87fac1d0ff34eb22f593df11Sebastian Redl 842972edf0534d8a50f87fac1d0ff34eb22f593df11Sebastian Redl CGF.MaybeEmitStdInitializerListCleanup(NewPtr, Init); 8439d232c884ea9872d6555df0fd7359699819bc1f1John McCall return; 8449d232c884ea9872d6555df0fd7359699819bc1f1John McCall } 845558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall } 8469d232c884ea9872d6555df0fd7359699819bc1f1John McCall llvm_unreachable("bad evaluation kind"); 847ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanian} 848ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanian 849ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanianvoid 850ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz JahanianCodeGenFunction::EmitNewArrayInitializer(const CXXNewExpr *E, 851197056726ed6412501130c2ef2ff69009772aa65John McCall QualType elementType, 852197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::Value *beginPtr, 853197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::Value *numElements) { 8542aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl if (!E->hasInitializer()) 8552aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl return; // We have a POD type. 856197056726ed6412501130c2ef2ff69009772aa65John McCall 8579203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl llvm::Value *explicitPtr = beginPtr; 858197056726ed6412501130c2ef2ff69009772aa65John McCall // Find the end of the array, hoisted out of the loop. 859197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::Value *endPtr = 860197056726ed6412501130c2ef2ff69009772aa65John McCall Builder.CreateInBoundsGEP(beginPtr, numElements, "array.end"); 861197056726ed6412501130c2ef2ff69009772aa65John McCall 8629203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl unsigned initializerElements = 0; 8639203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 8649203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl const Expr *Init = E->getInitializer(); 865577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier llvm::AllocaInst *endOfInit = 0; 866577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier QualType::DestructionKind dtorKind = elementType.isDestructedType(); 867577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier EHScopeStack::stable_iterator cleanup; 868577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier llvm::Instruction *cleanupDominator = 0; 8699203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // If the initializer is an initializer list, first do the explicit elements. 8709203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (const InitListExpr *ILE = dyn_cast<InitListExpr>(Init)) { 8719203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl initializerElements = ILE->getNumInits(); 872577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier 873577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // Enter a partial-destruction cleanup if necessary. 874577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier if (needsEHCleanup(dtorKind)) { 875577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // In principle we could tell the cleanup where we are more 876577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // directly, but the control flow can get so varied here that it 877577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // would actually be quite complex. Therefore we go through an 878577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // alloca. 879577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier endOfInit = CreateTempAlloca(beginPtr->getType(), "array.endOfInit"); 880577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier cleanupDominator = Builder.CreateStore(beginPtr, endOfInit); 881577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier pushIrregularPartialArrayCleanup(beginPtr, endOfInit, elementType, 882577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier getDestroyer(dtorKind)); 883577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier cleanup = EHStack.stable_begin(); 884577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier } 885577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier 8869203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl for (unsigned i = 0, e = ILE->getNumInits(); i != e; ++i) { 887577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // Tell the cleanup that it needs to destroy up to this 888577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // element. TODO: some of these stores can be trivially 889577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // observed to be unnecessary. 890577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier if (endOfInit) Builder.CreateStore(explicitPtr, endOfInit); 8919203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl StoreAnyExprIntoOneUnit(*this, ILE->getInit(i), elementType, explicitPtr); 8929203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl explicitPtr =Builder.CreateConstGEP1_32(explicitPtr, 1, "array.exp.next"); 8939203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } 8949203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 8959203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // The remaining elements are filled with the array filler expression. 8969203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl Init = ILE->getArrayFiller(); 8979203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } 8989203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 899197056726ed6412501130c2ef2ff69009772aa65John McCall // Create the continuation block. 900197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::BasicBlock *contBB = createBasicBlock("new.loop.end"); 901197056726ed6412501130c2ef2ff69009772aa65John McCall 9029203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // If the number of elements isn't constant, we have to now check if there is 9039203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // anything left to initialize. 9049203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (llvm::ConstantInt *constNum = dyn_cast<llvm::ConstantInt>(numElements)) { 9059203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // If all elements have already been initialized, skip the whole loop. 906577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier if (constNum->getZExtValue() <= initializerElements) { 907577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // If there was a cleanup, deactivate it. 908577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier if (cleanupDominator) 9091ad23d62007162df82b58bca31b4aa277a5f6586Dmitri Gribenko DeactivateCleanupBlock(cleanup, cleanupDominator); 910577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier return; 911577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier } 9129203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } else { 913197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::BasicBlock *nonEmptyBB = createBasicBlock("new.loop.nonempty"); 9149203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl llvm::Value *isEmpty = Builder.CreateICmpEQ(explicitPtr, endPtr, 915197056726ed6412501130c2ef2ff69009772aa65John McCall "array.isempty"); 916197056726ed6412501130c2ef2ff69009772aa65John McCall Builder.CreateCondBr(isEmpty, contBB, nonEmptyBB); 917197056726ed6412501130c2ef2ff69009772aa65John McCall EmitBlock(nonEmptyBB); 918197056726ed6412501130c2ef2ff69009772aa65John McCall } 919197056726ed6412501130c2ef2ff69009772aa65John McCall 920197056726ed6412501130c2ef2ff69009772aa65John McCall // Enter the loop. 921197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::BasicBlock *entryBB = Builder.GetInsertBlock(); 922197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::BasicBlock *loopBB = createBasicBlock("new.loop"); 923197056726ed6412501130c2ef2ff69009772aa65John McCall 924197056726ed6412501130c2ef2ff69009772aa65John McCall EmitBlock(loopBB); 925197056726ed6412501130c2ef2ff69009772aa65John McCall 926197056726ed6412501130c2ef2ff69009772aa65John McCall // Set up the current-element phi. 927197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::PHINode *curPtr = 9289203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl Builder.CreatePHI(explicitPtr->getType(), 2, "array.cur"); 9299203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl curPtr->addIncoming(explicitPtr, entryBB); 930197056726ed6412501130c2ef2ff69009772aa65John McCall 931577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // Store the new cleanup position for irregular cleanups. 932577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier if (endOfInit) Builder.CreateStore(curPtr, endOfInit); 933577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier 934197056726ed6412501130c2ef2ff69009772aa65John McCall // Enter a partial-destruction cleanup if necessary. 935577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier if (!cleanupDominator && needsEHCleanup(dtorKind)) { 936197056726ed6412501130c2ef2ff69009772aa65John McCall pushRegularPartialArrayCleanup(beginPtr, curPtr, elementType, 937197056726ed6412501130c2ef2ff69009772aa65John McCall getDestroyer(dtorKind)); 938197056726ed6412501130c2ef2ff69009772aa65John McCall cleanup = EHStack.stable_begin(); 9396f103ba42cb69d50005a977c5ea583984ab63fc4John McCall cleanupDominator = Builder.CreateUnreachable(); 940197056726ed6412501130c2ef2ff69009772aa65John McCall } 941197056726ed6412501130c2ef2ff69009772aa65John McCall 942197056726ed6412501130c2ef2ff69009772aa65John McCall // Emit the initializer into this element. 9439203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl StoreAnyExprIntoOneUnit(*this, Init, E->getAllocatedType(), curPtr); 944197056726ed6412501130c2ef2ff69009772aa65John McCall 945197056726ed6412501130c2ef2ff69009772aa65John McCall // Leave the cleanup if we entered one. 94640563cd5ea402b7a0db13058ee869a77cd1ab5eeEli Friedman if (cleanupDominator) { 9476f103ba42cb69d50005a977c5ea583984ab63fc4John McCall DeactivateCleanupBlock(cleanup, cleanupDominator); 9486f103ba42cb69d50005a977c5ea583984ab63fc4John McCall cleanupDominator->eraseFromParent(); 9496f103ba42cb69d50005a977c5ea583984ab63fc4John McCall } 950197056726ed6412501130c2ef2ff69009772aa65John McCall 951197056726ed6412501130c2ef2ff69009772aa65John McCall // Advance to the next element. 952197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::Value *nextPtr = Builder.CreateConstGEP1_32(curPtr, 1, "array.next"); 953197056726ed6412501130c2ef2ff69009772aa65John McCall 954197056726ed6412501130c2ef2ff69009772aa65John McCall // Check whether we've gotten to the end of the array and, if so, 955197056726ed6412501130c2ef2ff69009772aa65John McCall // exit the loop. 956197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::Value *isEnd = Builder.CreateICmpEQ(nextPtr, endPtr, "array.atend"); 957197056726ed6412501130c2ef2ff69009772aa65John McCall Builder.CreateCondBr(isEnd, contBB, loopBB); 958197056726ed6412501130c2ef2ff69009772aa65John McCall curPtr->addIncoming(nextPtr, Builder.GetInsertBlock()); 959197056726ed6412501130c2ef2ff69009772aa65John McCall 960197056726ed6412501130c2ef2ff69009772aa65John McCall EmitBlock(contBB); 961ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanian} 962ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanian 96359174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregorstatic void EmitZeroMemSet(CodeGenFunction &CGF, QualType T, 96459174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor llvm::Value *NewPtr, llvm::Value *Size) { 965d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall CGF.EmitCastToVoidPtr(NewPtr); 966fe71008c2764768f25478b16c1802755189ed7c9Ken Dyck CharUnits Alignment = CGF.getContext().getTypeAlignInChars(T); 9679f0c7cc36d29cf591c33962931f5862847145f3eBenjamin Kramer CGF.Builder.CreateMemSet(NewPtr, CGF.Builder.getInt8(0), Size, 968fe71008c2764768f25478b16c1802755189ed7c9Ken Dyck Alignment.getQuantity(), false); 96959174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor} 97059174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor 971a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlssonstatic void EmitNewInitializer(CodeGenFunction &CGF, const CXXNewExpr *E, 972197056726ed6412501130c2ef2ff69009772aa65John McCall QualType ElementType, 973a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson llvm::Value *NewPtr, 97459174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor llvm::Value *NumElements, 97559174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor llvm::Value *AllocSizeWithoutCookie) { 9762aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl const Expr *Init = E->getInitializer(); 9775d4d946ec2d88696fd8422aeb64dc29688e6a2c1Anders Carlsson if (E->isArray()) { 9782aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl if (const CXXConstructExpr *CCE = dyn_cast_or_null<CXXConstructExpr>(Init)){ 9792aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl CXXConstructorDecl *Ctor = CCE->getConstructor(); 980887ddf39b365320fdf8dde923287bf52bb3c6a38Douglas Gregor if (Ctor->isTrivial()) { 98159174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor // If new expression did not specify value-initialization, then there 98259174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor // is no initialization. 9832aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl if (!CCE->requiresZeroInitialization() || Ctor->getParent()->isEmpty()) 98459174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor return; 98559174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor 986197056726ed6412501130c2ef2ff69009772aa65John McCall if (CGF.CGM.getTypes().isZeroInitializable(ElementType)) { 98759174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor // Optimization: since zero initialization will just set the memory 98859174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor // to all zeroes, generate a single memset to do it in one shot. 989197056726ed6412501130c2ef2ff69009772aa65John McCall EmitZeroMemSet(CGF, ElementType, NewPtr, AllocSizeWithoutCookie); 99059174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor return; 99159174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor } 99259174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor } 993c3c0766277cd64bf117450a1519c9cf762d994d4John McCall 9942aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl CGF.EmitCXXAggrConstructorCall(Ctor, NumElements, NewPtr, 9952aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl CCE->arg_begin(), CCE->arg_end(), 996b41ba1aa47a66979df578074de3c218d820c152dEli Friedman CCE->requiresZeroInitialization()); 997e99bdb6969ec16d2829ccdf62b04a8c8eda8b215Anders Carlsson return; 9982aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl } else if (Init && isa<ImplicitValueInitExpr>(Init) && 99940563cd5ea402b7a0db13058ee869a77cd1ab5eeEli Friedman CGF.CGM.getTypes().isZeroInitializable(ElementType)) { 100059174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor // Optimization: since zero initialization will just set the memory 100159174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor // to all zeroes, generate a single memset to do it in one shot. 1002197056726ed6412501130c2ef2ff69009772aa65John McCall EmitZeroMemSet(CGF, ElementType, NewPtr, AllocSizeWithoutCookie); 1003197056726ed6412501130c2ef2ff69009772aa65John McCall return; 1004ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanian } 10052aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl CGF.EmitNewArrayInitializer(E, ElementType, NewPtr, NumElements); 10062aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl return; 10075d4d946ec2d88696fd8422aeb64dc29688e6a2c1Anders Carlsson } 1008a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 10092aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl if (!Init) 10105304c953c1ccba4772ee77ce6526fff14ef5a16cFariborz Jahanian return; 10112aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl 10129203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl StoreAnyExprIntoOneUnit(CGF, Init, E->getAllocatedType(), NewPtr); 1013a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson} 1014a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 10157d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCallnamespace { 10167d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall /// A cleanup to call the given 'operator delete' function upon 10177d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall /// abnormal exit from a new expression. 10187d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall class CallDeleteDuringNew : public EHScopeStack::Cleanup { 10197d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall size_t NumPlacementArgs; 10207d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall const FunctionDecl *OperatorDelete; 10217d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall llvm::Value *Ptr; 10227d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall llvm::Value *AllocSize; 10237d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10247d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall RValue *getPlacementArgs() { return reinterpret_cast<RValue*>(this+1); } 10257d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10267d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall public: 10277d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall static size_t getExtraSize(size_t NumPlacementArgs) { 10287d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall return NumPlacementArgs * sizeof(RValue); 10297d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall } 10307d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10317d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall CallDeleteDuringNew(size_t NumPlacementArgs, 10327d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall const FunctionDecl *OperatorDelete, 10337d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall llvm::Value *Ptr, 10347d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall llvm::Value *AllocSize) 10357d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall : NumPlacementArgs(NumPlacementArgs), OperatorDelete(OperatorDelete), 10367d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall Ptr(Ptr), AllocSize(AllocSize) {} 10377d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10387d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall void setPlacementArg(unsigned I, RValue Arg) { 10397d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall assert(I < NumPlacementArgs && "index out of range"); 10407d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall getPlacementArgs()[I] = Arg; 10417d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall } 10427d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 1043ad346f4f678ab1c3222425641d851dc63e9dfa1aJohn McCall void Emit(CodeGenFunction &CGF, Flags flags) { 10447d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall const FunctionProtoType *FPT 10457d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall = OperatorDelete->getType()->getAs<FunctionProtoType>(); 10467d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall assert(FPT->getNumArgs() == NumPlacementArgs + 1 || 1047c384636f9a405b687990564b204b98e360c81587John McCall (FPT->getNumArgs() == 2 && NumPlacementArgs == 0)); 10487d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10497d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall CallArgList DeleteArgs; 10507d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10517d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // The first argument is always a void*. 10527d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall FunctionProtoType::arg_type_iterator AI = FPT->arg_type_begin(); 105304c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RValue::get(Ptr), *AI++); 10547d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10557d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // A member 'operator delete' can take an extra 'size_t' argument. 10567d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall if (FPT->getNumArgs() == NumPlacementArgs + 2) 105704c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RValue::get(AllocSize), *AI++); 10587d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10597d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // Pass the rest of the arguments, which must match exactly. 10607d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall for (unsigned I = 0; I != NumPlacementArgs; ++I) 106104c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(getPlacementArgs()[I], *AI++); 10627d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10637d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // Call 'operator delete'. 10640f3d0970dcdf6cf17550b86838dff12813968dbcJohn McCall CGF.EmitCall(CGF.CGM.getTypes().arrangeFreeFunctionCall(DeleteArgs, FPT), 10657d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall CGF.CGM.GetAddrOfFunction(OperatorDelete), 10667d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall ReturnValueSlot(), DeleteArgs, OperatorDelete); 10677d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall } 10687d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall }; 10693019c444c672938c57f5573840071ecd73425ee7John McCall 10703019c444c672938c57f5573840071ecd73425ee7John McCall /// A cleanup to call the given 'operator delete' function upon 10713019c444c672938c57f5573840071ecd73425ee7John McCall /// abnormal exit from a new expression when the new expression is 10723019c444c672938c57f5573840071ecd73425ee7John McCall /// conditional. 10733019c444c672938c57f5573840071ecd73425ee7John McCall class CallDeleteDuringConditionalNew : public EHScopeStack::Cleanup { 10743019c444c672938c57f5573840071ecd73425ee7John McCall size_t NumPlacementArgs; 10753019c444c672938c57f5573840071ecd73425ee7John McCall const FunctionDecl *OperatorDelete; 1076804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type Ptr; 1077804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type AllocSize; 10783019c444c672938c57f5573840071ecd73425ee7John McCall 1079804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type *getPlacementArgs() { 1080804b807ea918184d6de63bd745e1ff75a9bfc679John McCall return reinterpret_cast<DominatingValue<RValue>::saved_type*>(this+1); 10813019c444c672938c57f5573840071ecd73425ee7John McCall } 10823019c444c672938c57f5573840071ecd73425ee7John McCall 10833019c444c672938c57f5573840071ecd73425ee7John McCall public: 10843019c444c672938c57f5573840071ecd73425ee7John McCall static size_t getExtraSize(size_t NumPlacementArgs) { 1085804b807ea918184d6de63bd745e1ff75a9bfc679John McCall return NumPlacementArgs * sizeof(DominatingValue<RValue>::saved_type); 10863019c444c672938c57f5573840071ecd73425ee7John McCall } 10873019c444c672938c57f5573840071ecd73425ee7John McCall 10883019c444c672938c57f5573840071ecd73425ee7John McCall CallDeleteDuringConditionalNew(size_t NumPlacementArgs, 10893019c444c672938c57f5573840071ecd73425ee7John McCall const FunctionDecl *OperatorDelete, 1090804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type Ptr, 1091804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type AllocSize) 10923019c444c672938c57f5573840071ecd73425ee7John McCall : NumPlacementArgs(NumPlacementArgs), OperatorDelete(OperatorDelete), 10933019c444c672938c57f5573840071ecd73425ee7John McCall Ptr(Ptr), AllocSize(AllocSize) {} 10943019c444c672938c57f5573840071ecd73425ee7John McCall 1095804b807ea918184d6de63bd745e1ff75a9bfc679John McCall void setPlacementArg(unsigned I, DominatingValue<RValue>::saved_type Arg) { 10963019c444c672938c57f5573840071ecd73425ee7John McCall assert(I < NumPlacementArgs && "index out of range"); 10973019c444c672938c57f5573840071ecd73425ee7John McCall getPlacementArgs()[I] = Arg; 10983019c444c672938c57f5573840071ecd73425ee7John McCall } 10993019c444c672938c57f5573840071ecd73425ee7John McCall 1100ad346f4f678ab1c3222425641d851dc63e9dfa1aJohn McCall void Emit(CodeGenFunction &CGF, Flags flags) { 11013019c444c672938c57f5573840071ecd73425ee7John McCall const FunctionProtoType *FPT 11023019c444c672938c57f5573840071ecd73425ee7John McCall = OperatorDelete->getType()->getAs<FunctionProtoType>(); 11033019c444c672938c57f5573840071ecd73425ee7John McCall assert(FPT->getNumArgs() == NumPlacementArgs + 1 || 11043019c444c672938c57f5573840071ecd73425ee7John McCall (FPT->getNumArgs() == 2 && NumPlacementArgs == 0)); 11053019c444c672938c57f5573840071ecd73425ee7John McCall 11063019c444c672938c57f5573840071ecd73425ee7John McCall CallArgList DeleteArgs; 11073019c444c672938c57f5573840071ecd73425ee7John McCall 11083019c444c672938c57f5573840071ecd73425ee7John McCall // The first argument is always a void*. 11093019c444c672938c57f5573840071ecd73425ee7John McCall FunctionProtoType::arg_type_iterator AI = FPT->arg_type_begin(); 111004c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(Ptr.restore(CGF), *AI++); 11113019c444c672938c57f5573840071ecd73425ee7John McCall 11123019c444c672938c57f5573840071ecd73425ee7John McCall // A member 'operator delete' can take an extra 'size_t' argument. 11133019c444c672938c57f5573840071ecd73425ee7John McCall if (FPT->getNumArgs() == NumPlacementArgs + 2) { 1114804b807ea918184d6de63bd745e1ff75a9bfc679John McCall RValue RV = AllocSize.restore(CGF); 111504c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RV, *AI++); 11163019c444c672938c57f5573840071ecd73425ee7John McCall } 11173019c444c672938c57f5573840071ecd73425ee7John McCall 11183019c444c672938c57f5573840071ecd73425ee7John McCall // Pass the rest of the arguments, which must match exactly. 11193019c444c672938c57f5573840071ecd73425ee7John McCall for (unsigned I = 0; I != NumPlacementArgs; ++I) { 1120804b807ea918184d6de63bd745e1ff75a9bfc679John McCall RValue RV = getPlacementArgs()[I].restore(CGF); 112104c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RV, *AI++); 11223019c444c672938c57f5573840071ecd73425ee7John McCall } 11233019c444c672938c57f5573840071ecd73425ee7John McCall 11243019c444c672938c57f5573840071ecd73425ee7John McCall // Call 'operator delete'. 11250f3d0970dcdf6cf17550b86838dff12813968dbcJohn McCall CGF.EmitCall(CGF.CGM.getTypes().arrangeFreeFunctionCall(DeleteArgs, FPT), 11263019c444c672938c57f5573840071ecd73425ee7John McCall CGF.CGM.GetAddrOfFunction(OperatorDelete), 11273019c444c672938c57f5573840071ecd73425ee7John McCall ReturnValueSlot(), DeleteArgs, OperatorDelete); 11283019c444c672938c57f5573840071ecd73425ee7John McCall } 11293019c444c672938c57f5573840071ecd73425ee7John McCall }; 11303019c444c672938c57f5573840071ecd73425ee7John McCall} 11313019c444c672938c57f5573840071ecd73425ee7John McCall 11323019c444c672938c57f5573840071ecd73425ee7John McCall/// Enter a cleanup to call 'operator delete' if the initializer in a 11333019c444c672938c57f5573840071ecd73425ee7John McCall/// new-expression throws. 11343019c444c672938c57f5573840071ecd73425ee7John McCallstatic void EnterNewDeleteCleanup(CodeGenFunction &CGF, 11353019c444c672938c57f5573840071ecd73425ee7John McCall const CXXNewExpr *E, 11363019c444c672938c57f5573840071ecd73425ee7John McCall llvm::Value *NewPtr, 11373019c444c672938c57f5573840071ecd73425ee7John McCall llvm::Value *AllocSize, 11383019c444c672938c57f5573840071ecd73425ee7John McCall const CallArgList &NewArgs) { 11393019c444c672938c57f5573840071ecd73425ee7John McCall // If we're not inside a conditional branch, then the cleanup will 11403019c444c672938c57f5573840071ecd73425ee7John McCall // dominate and we can do the easier (and more efficient) thing. 11413019c444c672938c57f5573840071ecd73425ee7John McCall if (!CGF.isInConditionalBranch()) { 11423019c444c672938c57f5573840071ecd73425ee7John McCall CallDeleteDuringNew *Cleanup = CGF.EHStack 11433019c444c672938c57f5573840071ecd73425ee7John McCall .pushCleanupWithExtra<CallDeleteDuringNew>(EHCleanup, 11443019c444c672938c57f5573840071ecd73425ee7John McCall E->getNumPlacementArgs(), 11453019c444c672938c57f5573840071ecd73425ee7John McCall E->getOperatorDelete(), 11463019c444c672938c57f5573840071ecd73425ee7John McCall NewPtr, AllocSize); 11473019c444c672938c57f5573840071ecd73425ee7John McCall for (unsigned I = 0, N = E->getNumPlacementArgs(); I != N; ++I) 1148c6d07821c529bb95e4cf072e49b736c5142f1786Eli Friedman Cleanup->setPlacementArg(I, NewArgs[I+1].RV); 11493019c444c672938c57f5573840071ecd73425ee7John McCall 11503019c444c672938c57f5573840071ecd73425ee7John McCall return; 11513019c444c672938c57f5573840071ecd73425ee7John McCall } 11523019c444c672938c57f5573840071ecd73425ee7John McCall 11533019c444c672938c57f5573840071ecd73425ee7John McCall // Otherwise, we need to save all this stuff. 1154804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type SavedNewPtr = 1155804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::save(CGF, RValue::get(NewPtr)); 1156804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type SavedAllocSize = 1157804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::save(CGF, RValue::get(AllocSize)); 11583019c444c672938c57f5573840071ecd73425ee7John McCall 11593019c444c672938c57f5573840071ecd73425ee7John McCall CallDeleteDuringConditionalNew *Cleanup = CGF.EHStack 11606f103ba42cb69d50005a977c5ea583984ab63fc4John McCall .pushCleanupWithExtra<CallDeleteDuringConditionalNew>(EHCleanup, 11613019c444c672938c57f5573840071ecd73425ee7John McCall E->getNumPlacementArgs(), 11623019c444c672938c57f5573840071ecd73425ee7John McCall E->getOperatorDelete(), 11633019c444c672938c57f5573840071ecd73425ee7John McCall SavedNewPtr, 11643019c444c672938c57f5573840071ecd73425ee7John McCall SavedAllocSize); 11653019c444c672938c57f5573840071ecd73425ee7John McCall for (unsigned I = 0, N = E->getNumPlacementArgs(); I != N; ++I) 1166804b807ea918184d6de63bd745e1ff75a9bfc679John McCall Cleanup->setPlacementArg(I, 1167c6d07821c529bb95e4cf072e49b736c5142f1786Eli Friedman DominatingValue<RValue>::save(CGF, NewArgs[I+1].RV)); 11683019c444c672938c57f5573840071ecd73425ee7John McCall 11696f103ba42cb69d50005a977c5ea583984ab63fc4John McCall CGF.initFullExprCleanup(); 11707d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall} 11717d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 117216d81b8db39593b5f1a38b077757272a09c12da8Anders Carlssonllvm::Value *CodeGenFunction::EmitCXXNewExpr(const CXXNewExpr *E) { 1173c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // The element type being allocated. 1174c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall QualType allocType = getContext().getBaseElementType(E->getAllocatedType()); 11751e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1176c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // 1. Build a call to the allocation function. 1177c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall FunctionDecl *allocator = E->getOperatorNew(); 1178c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall const FunctionProtoType *allocatorType = 1179c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall allocator->getType()->castAs<FunctionProtoType>(); 118016d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1181c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall CallArgList allocatorArgs; 118216d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 118316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // The allocation size is the first argument. 1184c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall QualType sizeType = getContext().getSizeType(); 118516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 11869203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // If there is a brace-initializer, cannot allocate fewer elements than inits. 11879203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl unsigned minElements = 0; 11889203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (E->isArray() && E->hasInitializer()) { 11899203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (const InitListExpr *ILE = dyn_cast<InitListExpr>(E->getInitializer())) 11909203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl minElements = ILE->getNumInits(); 11919203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } 11929203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 1193c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::Value *numElements = 0; 1194c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::Value *allocSizeWithoutCookie = 0; 1195c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::Value *allocSize = 11969203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl EmitCXXNewAllocSize(*this, E, minElements, numElements, 11979203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl allocSizeWithoutCookie); 1198a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 119904c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman allocatorArgs.add(RValue::get(allocSize), sizeType); 120016d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 120116d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // Emit the rest of the arguments. 120216d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // FIXME: Ideally, this should just use EmitCallArgs. 1203c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall CXXNewExpr::const_arg_iterator placementArg = E->placement_arg_begin(); 120416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 120516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // First, use the types from the function type. 120616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // We start at 1 here because the first argument (the allocation size) 120716d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // has already been emitted. 1208c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall for (unsigned i = 1, e = allocatorType->getNumArgs(); i != e; 1209c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall ++i, ++placementArg) { 1210c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall QualType argType = allocatorType->getArgType(i); 121116d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1212c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall assert(getContext().hasSameUnqualifiedType(argType.getNonReferenceType(), 1213c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall placementArg->getType()) && 121416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson "type mismatch in call argument!"); 121516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1216413ebdb1af6fb0d81845b61254daf02ba0449afdJohn McCall EmitCallArg(allocatorArgs, *placementArg, argType); 121716d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson } 121816d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 121916d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // Either we've emitted all the call args, or we have a call to a 122016d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // variadic function. 1221c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall assert((placementArg == E->placement_arg_end() || 1222c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall allocatorType->isVariadic()) && 1223c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall "Extra arguments to non-variadic function!"); 122416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 122516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // If we still have any arguments, emit them using the type of the argument. 1226c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall for (CXXNewExpr::const_arg_iterator placementArgsEnd = E->placement_arg_end(); 1227c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall placementArg != placementArgsEnd; ++placementArg) { 1228413ebdb1af6fb0d81845b61254daf02ba0449afdJohn McCall EmitCallArg(allocatorArgs, *placementArg, placementArg->getType()); 122916d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson } 123016d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1231b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // Emit the allocation call. If the allocator is a global placement 1232b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // operator, just "inline" it directly. 1233b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall RValue RV; 1234b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall if (allocator->isReservedGlobalPlacementOperator()) { 1235b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall assert(allocatorArgs.size() == 2); 1236b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall RV = allocatorArgs[1].RV; 1237b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // TODO: kill any unnecessary computations done for the size 1238b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // argument. 1239b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall } else { 12400f3d0970dcdf6cf17550b86838dff12813968dbcJohn McCall RV = EmitCall(CGM.getTypes().arrangeFreeFunctionCall(allocatorArgs, 12410f3d0970dcdf6cf17550b86838dff12813968dbcJohn McCall allocatorType), 1242b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall CGM.GetAddrOfFunction(allocator), ReturnValueSlot(), 1243b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall allocatorArgs, allocator); 1244b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall } 124516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1246c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // Emit a null check on the allocation result if the allocation 1247c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // function is allowed to return null (because it has a non-throwing 1248c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // exception spec; for this part, we inline 1249c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // CXXNewExpr::shouldNullCheckAllocation()) and we have an 1250c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // interesting initializer. 12518026f6d82f7fa544bc0453714fe94bca62a1196eSebastian Redl bool nullCheck = allocatorType->isNothrow(getContext()) && 12522aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl (!allocType.isPODType(getContext()) || E->hasInitializer()); 125316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1254c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::BasicBlock *nullCheckBB = 0; 1255c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::BasicBlock *contBB = 0; 125616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1257c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::Value *allocation = RV.getScalarVal(); 1258956a5a17713deb1b5b27893303c4f308a1bd2a62Micah Villmow unsigned AS = allocation->getType()->getPointerAddressSpace(); 125916d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1260a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall // The null-check means that the initializer is conditionally 1261a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall // evaluated. 1262a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall ConditionalEvaluation conditional(*this); 1263a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall 1264c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall if (nullCheck) { 1265c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall conditional.begin(*this); 126616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1267c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall nullCheckBB = Builder.GetInsertBlock(); 1268c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::BasicBlock *notNullBB = createBasicBlock("new.notnull"); 1269c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall contBB = createBasicBlock("new.cont"); 1270a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall 1271c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::Value *isNull = Builder.CreateIsNull(allocation, "new.isnull"); 1272c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall Builder.CreateCondBr(isNull, contBB, notNullBB); 1273c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall EmitBlock(notNullBB); 127416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson } 12751e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 12767d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // If there's an operator delete, enter a cleanup to call it if an 12777d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // exception is thrown. 1278c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall EHScopeStack::stable_iterator operatorDeleteCleanup; 12796f103ba42cb69d50005a977c5ea583984ab63fc4John McCall llvm::Instruction *cleanupDominator = 0; 1280b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall if (E->getOperatorDelete() && 1281b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall !E->getOperatorDelete()->isReservedGlobalPlacementOperator()) { 1282c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall EnterNewDeleteCleanup(*this, E, allocation, allocSize, allocatorArgs); 1283c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall operatorDeleteCleanup = EHStack.stable_begin(); 12846f103ba42cb69d50005a977c5ea583984ab63fc4John McCall cleanupDominator = Builder.CreateUnreachable(); 12857d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall } 12867d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 1287576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman assert((allocSize == allocSizeWithoutCookie) == 1288576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman CalculateCookiePadding(*this, E).isZero()); 1289576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman if (allocSize != allocSizeWithoutCookie) { 1290576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman assert(E->isArray()); 1291576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman allocation = CGM.getCXXABI().InitializeArrayCookie(*this, allocation, 1292576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman numElements, 1293576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman E, allocType); 1294576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman } 1295576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman 12962acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *elementPtrTy 1297c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall = ConvertTypeForMem(allocType)->getPointerTo(AS); 1298c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::Value *result = Builder.CreateBitCast(allocation, elementPtrTy); 12997d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 1300197056726ed6412501130c2ef2ff69009772aa65John McCall EmitNewInitializer(*this, E, allocType, result, numElements, 1301197056726ed6412501130c2ef2ff69009772aa65John McCall allocSizeWithoutCookie); 13021e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (E->isArray()) { 13031e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // NewPtr is a pointer to the base element type. If we're 13041e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // allocating an array of arrays, we'll need to cast back to the 13051e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // array pointer type. 13062acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *resultType = ConvertTypeForMem(E->getType()); 1307c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall if (result->getType() != resultType) 1308c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall result = Builder.CreateBitCast(result, resultType); 1309ceb43b662bf09b44a08714e8f9d222780ca979d7Fariborz Jahanian } 13107d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 13117d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // Deactivate the 'operator delete' cleanup if we finished 13127d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // initialization. 13136f103ba42cb69d50005a977c5ea583984ab63fc4John McCall if (operatorDeleteCleanup.isValid()) { 13146f103ba42cb69d50005a977c5ea583984ab63fc4John McCall DeactivateCleanupBlock(operatorDeleteCleanup, cleanupDominator); 13156f103ba42cb69d50005a977c5ea583984ab63fc4John McCall cleanupDominator->eraseFromParent(); 13166f103ba42cb69d50005a977c5ea583984ab63fc4John McCall } 13172aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl 1318c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall if (nullCheck) { 1319a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall conditional.end(*this); 1320a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall 1321c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::BasicBlock *notNullBB = Builder.GetInsertBlock(); 1322c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall EmitBlock(contBB); 132316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1324bbf3bacb3e0c1ebb3e8a4a8b1330404a7e379315Jay Foad llvm::PHINode *PHI = Builder.CreatePHI(result->getType(), 2); 1325c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall PHI->addIncoming(result, notNullBB); 1326c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall PHI->addIncoming(llvm::Constant::getNullValue(result->getType()), 1327c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall nullCheckBB); 132816d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1329c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall result = PHI; 133016d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson } 13311e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1332c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall return result; 133316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson} 133416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 13355fe05986473c4ff780508dec4cd2cf4822168125Eli Friedmanvoid CodeGenFunction::EmitDeleteCall(const FunctionDecl *DeleteFD, 13365fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman llvm::Value *Ptr, 13375fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman QualType DeleteTy) { 13381e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall assert(DeleteFD->getOverloadedOperator() == OO_Delete); 13391e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 13405fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman const FunctionProtoType *DeleteFTy = 13415fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman DeleteFD->getType()->getAs<FunctionProtoType>(); 13425fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman 13435fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman CallArgList DeleteArgs; 13445fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman 1345871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson // Check if we need to pass the size to the delete operator. 1346871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson llvm::Value *Size = 0; 1347871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson QualType SizeTy; 13485fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman if (DeleteFTy->getNumArgs() == 2) { 1349871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson SizeTy = DeleteFTy->getArgType(1); 13504f122ef0ca7683486d78c84ed87455d5f35ee1b1Ken Dyck CharUnits DeleteTypeSize = getContext().getTypeSizeInChars(DeleteTy); 13514f122ef0ca7683486d78c84ed87455d5f35ee1b1Ken Dyck Size = llvm::ConstantInt::get(ConvertType(SizeTy), 13524f122ef0ca7683486d78c84ed87455d5f35ee1b1Ken Dyck DeleteTypeSize.getQuantity()); 1353871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson } 1354871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson 1355871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson QualType ArgTy = DeleteFTy->getArgType(0); 1356871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson llvm::Value *DeletePtr = Builder.CreateBitCast(Ptr, ConvertType(ArgTy)); 135704c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RValue::get(DeletePtr), ArgTy); 1358871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson 1359871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson if (Size) 136004c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RValue::get(Size), SizeTy); 13615fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman 13625fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman // Emit the call to delete. 13630f3d0970dcdf6cf17550b86838dff12813968dbcJohn McCall EmitCall(CGM.getTypes().arrangeFreeFunctionCall(DeleteArgs, DeleteFTy), 1364f3c47c9525153aea2de0ec4bd615b9cf2d81c103Anders Carlsson CGM.GetAddrOfFunction(DeleteFD), ReturnValueSlot(), 13655fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman DeleteArgs, DeleteFD); 13665fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman} 13675fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman 13681e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCallnamespace { 13691e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall /// Calls the given 'operator delete' on a single object. 13701e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall struct CallObjectDelete : EHScopeStack::Cleanup { 13711e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *Ptr; 13721e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionDecl *OperatorDelete; 13731e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType ElementType; 13741e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 13751e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CallObjectDelete(llvm::Value *Ptr, 13761e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionDecl *OperatorDelete, 13771e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType ElementType) 13781e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall : Ptr(Ptr), OperatorDelete(OperatorDelete), ElementType(ElementType) {} 13791e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1380ad346f4f678ab1c3222425641d851dc63e9dfa1aJohn McCall void Emit(CodeGenFunction &CGF, Flags flags) { 13811e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.EmitDeleteCall(OperatorDelete, Ptr, ElementType); 13821e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 13831e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall }; 13841e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall} 13851e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 13861e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall/// Emit the code for deleting a single object. 13871e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCallstatic void EmitObjectDelete(CodeGenFunction &CGF, 13881e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionDecl *OperatorDelete, 13891e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *Ptr, 1390a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor QualType ElementType, 1391a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor bool UseGlobalDelete) { 13921e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Find the destructor for the type, if applicable. If the 13931e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // destructor is virtual, we'll just emit the vcall and return. 13941e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const CXXDestructorDecl *Dtor = 0; 13951e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (const RecordType *RT = ElementType->getAs<RecordType>()) { 13961e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 1397aebab72698ce5283395e61597a266fb04e62e390Eli Friedman if (RD->hasDefinition() && !RD->hasTrivialDestructor()) { 13981e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall Dtor = RD->getDestructor(); 13991e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14001e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (Dtor->isVirtual()) { 1401a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor if (UseGlobalDelete) { 1402a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor // If we're supposed to call the global delete, make sure we do so 1403a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor // even if the destructor throws. 1404ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall 1405ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall // Derive the complete-object pointer, which is what we need 1406ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall // to pass to the deallocation function. 1407ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall llvm::Value *completePtr = 1408ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall CGF.CGM.getCXXABI().adjustToCompleteObject(CGF, Ptr, ElementType); 1409ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall 1410a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor CGF.EHStack.pushCleanup<CallObjectDelete>(NormalAndEHCleanup, 1411ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall completePtr, OperatorDelete, 1412a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor ElementType); 1413a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor } 14140f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov 14154def70d3040e73707c738f7c366737a986135edfRichard Smith // FIXME: Provide a source location here. 14160f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov CXXDtorType DtorType = UseGlobalDelete ? Dtor_Complete : Dtor_Deleting; 14170f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov CGF.CGM.getCXXABI().EmitVirtualDestructorCall(CGF, Dtor, DtorType, 14180f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov SourceLocation(), 14190f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov ReturnValueSlot(), Ptr); 14201e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1421a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor if (UseGlobalDelete) { 1422a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor CGF.PopCleanupBlock(); 1423a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor } 1424a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor 14251e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall return; 14261e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 14271e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 14281e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 14291e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14301e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Make sure that we call delete even if the dtor throws. 14313ad32c8d93eb65d1d4943d7df567fc9b4f55d137John McCall // This doesn't have to a conditional cleanup because we're going 14323ad32c8d93eb65d1d4943d7df567fc9b4f55d137John McCall // to pop it off in a second. 14331e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.EHStack.pushCleanup<CallObjectDelete>(NormalAndEHCleanup, 14341e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall Ptr, OperatorDelete, ElementType); 14351e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14361e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (Dtor) 14371e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.EmitCXXDestructorCall(Dtor, Dtor_Complete, 1438378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor /*ForVirtualBase=*/false, 1439378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor /*Delegating=*/false, 1440378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor Ptr); 14414e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie else if (CGF.getLangOpts().ObjCAutoRefCount && 1442f85e193739c953358c865005855253af4f68a497John McCall ElementType->isObjCLifetimeType()) { 1443f85e193739c953358c865005855253af4f68a497John McCall switch (ElementType.getObjCLifetime()) { 1444f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_None: 1445f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_ExplicitNone: 1446f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_Autoreleasing: 1447f85e193739c953358c865005855253af4f68a497John McCall break; 14481e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1449f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_Strong: { 1450f85e193739c953358c865005855253af4f68a497John McCall // Load the pointer value. 1451f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *PtrValue = CGF.Builder.CreateLoad(Ptr, 1452f85e193739c953358c865005855253af4f68a497John McCall ElementType.isVolatileQualified()); 1453f85e193739c953358c865005855253af4f68a497John McCall 14545b07e8077a20b80fee90bd76c43c6150c676e4a8John McCall CGF.EmitARCRelease(PtrValue, ARCPreciseLifetime); 1455f85e193739c953358c865005855253af4f68a497John McCall break; 1456f85e193739c953358c865005855253af4f68a497John McCall } 1457f85e193739c953358c865005855253af4f68a497John McCall 1458f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_Weak: 1459f85e193739c953358c865005855253af4f68a497John McCall CGF.EmitARCDestroyWeak(Ptr); 1460f85e193739c953358c865005855253af4f68a497John McCall break; 1461f85e193739c953358c865005855253af4f68a497John McCall } 1462f85e193739c953358c865005855253af4f68a497John McCall } 1463f85e193739c953358c865005855253af4f68a497John McCall 14641e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.PopCleanupBlock(); 14651e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall} 14661e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14671e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCallnamespace { 14681e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall /// Calls the given 'operator delete' on an array of objects. 14691e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall struct CallArrayDelete : EHScopeStack::Cleanup { 14701e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *Ptr; 14711e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionDecl *OperatorDelete; 14721e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *NumElements; 14731e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType ElementType; 14741e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CharUnits CookieSize; 14751e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14761e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CallArrayDelete(llvm::Value *Ptr, 14771e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionDecl *OperatorDelete, 14781e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *NumElements, 14791e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType ElementType, 14801e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CharUnits CookieSize) 14811e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall : Ptr(Ptr), OperatorDelete(OperatorDelete), NumElements(NumElements), 14821e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall ElementType(ElementType), CookieSize(CookieSize) {} 14831e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1484ad346f4f678ab1c3222425641d851dc63e9dfa1aJohn McCall void Emit(CodeGenFunction &CGF, Flags flags) { 14851e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionProtoType *DeleteFTy = 14861e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall OperatorDelete->getType()->getAs<FunctionProtoType>(); 14871e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall assert(DeleteFTy->getNumArgs() == 1 || DeleteFTy->getNumArgs() == 2); 14881e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14891e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CallArgList Args; 14901e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14911e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Pass the pointer as the first argument. 14921e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType VoidPtrTy = DeleteFTy->getArgType(0); 14931e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *DeletePtr 14941e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall = CGF.Builder.CreateBitCast(Ptr, CGF.ConvertType(VoidPtrTy)); 149504c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman Args.add(RValue::get(DeletePtr), VoidPtrTy); 14961e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14971e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Pass the original requested size as the second argument. 14981e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (DeleteFTy->getNumArgs() == 2) { 14991e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType size_t = DeleteFTy->getArgType(1); 15002acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::IntegerType *SizeTy 15011e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall = cast<llvm::IntegerType>(CGF.ConvertType(size_t)); 15021e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15031e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CharUnits ElementTypeSize = 15041e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.CGM.getContext().getTypeSizeInChars(ElementType); 15051e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15061e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // The size of an element, multiplied by the number of elements. 15071e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *Size 15081e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall = llvm::ConstantInt::get(SizeTy, ElementTypeSize.getQuantity()); 15091e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall Size = CGF.Builder.CreateMul(Size, NumElements); 15101e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15111e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Plus the size of the cookie if applicable. 15121e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (!CookieSize.isZero()) { 15131e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *CookieSizeV 15141e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall = llvm::ConstantInt::get(SizeTy, CookieSize.getQuantity()); 15151e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall Size = CGF.Builder.CreateAdd(Size, CookieSizeV); 15161e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 15171e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 151804c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman Args.add(RValue::get(Size), size_t); 15191e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 15201e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15211e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Emit the call to delete. 15220f3d0970dcdf6cf17550b86838dff12813968dbcJohn McCall CGF.EmitCall(CGF.getTypes().arrangeFreeFunctionCall(Args, DeleteFTy), 15231e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.CGM.GetAddrOfFunction(OperatorDelete), 15241e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall ReturnValueSlot(), Args, OperatorDelete); 15251e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 15261e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall }; 15271e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall} 15281e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15291e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall/// Emit the code for deleting an array of objects. 15301e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCallstatic void EmitArrayDelete(CodeGenFunction &CGF, 15316ec278d1a354517e20f13a877481453ee7940c78John McCall const CXXDeleteExpr *E, 15327cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall llvm::Value *deletedPtr, 15337cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall QualType elementType) { 15347cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall llvm::Value *numElements = 0; 15357cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall llvm::Value *allocatedPtr = 0; 15367cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CharUnits cookieSize; 15377cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CGF.CGM.getCXXABI().ReadArrayCookie(CGF, deletedPtr, E, elementType, 15387cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall numElements, allocatedPtr, cookieSize); 15391e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15407cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall assert(allocatedPtr && "ReadArrayCookie didn't set allocated pointer"); 15411e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15421e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Make sure that we call delete even if one of the dtors throws. 15437cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall const FunctionDecl *operatorDelete = E->getOperatorDelete(); 15441e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.EHStack.pushCleanup<CallArrayDelete>(NormalAndEHCleanup, 15457cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall allocatedPtr, operatorDelete, 15467cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall numElements, elementType, 15477cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall cookieSize); 15487cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall 15497cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall // Destroy the elements. 15507cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall if (QualType::DestructionKind dtorKind = elementType.isDestructedType()) { 15517cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall assert(numElements && "no element count for a type with a destructor!"); 15527cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall 15537cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall llvm::Value *arrayEnd = 15547cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CGF.Builder.CreateInBoundsGEP(deletedPtr, numElements, "delete.end"); 1555fbf780a9d1dbb191fc40c8af967c590e08724b74John McCall 1556fbf780a9d1dbb191fc40c8af967c590e08724b74John McCall // Note that it is legal to allocate a zero-length array, and we 1557fbf780a9d1dbb191fc40c8af967c590e08724b74John McCall // can never fold the check away because the length should always 1558fbf780a9d1dbb191fc40c8af967c590e08724b74John McCall // come from a cookie. 15597cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CGF.emitArrayDestroy(deletedPtr, arrayEnd, elementType, 15607cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CGF.getDestroyer(dtorKind), 1561fbf780a9d1dbb191fc40c8af967c590e08724b74John McCall /*checkZeroLength*/ true, 15627cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CGF.needsEHCleanup(dtorKind)); 15631e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 15641e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15657cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall // Pop the cleanup block. 15661e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.PopCleanupBlock(); 15671e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall} 15681e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 156916d81b8db39593b5f1a38b077757272a09c12da8Anders Carlssonvoid CodeGenFunction::EmitCXXDeleteExpr(const CXXDeleteExpr *E) { 15709091656e423f2354e53b2b3baa95b3eb5510badcDouglas Gregor const Expr *Arg = E->getArgument(); 15719091656e423f2354e53b2b3baa95b3eb5510badcDouglas Gregor llvm::Value *Ptr = EmitScalarExpr(Arg); 157216d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 157316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // Null check the pointer. 157416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson llvm::BasicBlock *DeleteNotNull = createBasicBlock("delete.notnull"); 157516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson llvm::BasicBlock *DeleteEnd = createBasicBlock("delete.end"); 157616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1577b924124316becf2968a37dab36d0c48ea167666fAnders Carlsson llvm::Value *IsNull = Builder.CreateIsNull(Ptr, "isnull"); 157816d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 157916d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson Builder.CreateCondBr(IsNull, DeleteEnd, DeleteNotNull); 158016d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson EmitBlock(DeleteNotNull); 15811e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15821e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // We might be deleting a pointer to array. If so, GEP down to the 15831e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // first non-array element. 15841e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // (this assumes that A(*)[3][7] is converted to [3 x [7 x %A]]*) 15851e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType DeleteTy = Arg->getType()->getAs<PointerType>()->getPointeeType(); 15861e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (DeleteTy->isConstantArrayType()) { 15871e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *Zero = Builder.getInt32(0); 15885f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Value*,8> GEP; 15891e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15901e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall GEP.push_back(Zero); // point at the outermost array 15911e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15921e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // For each layer of array type we're pointing at: 15931e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall while (const ConstantArrayType *Arr 15941e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall = getContext().getAsConstantArrayType(DeleteTy)) { 15951e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // 1. Unpeel the array type. 15961e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall DeleteTy = Arr->getElementType(); 15971e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15981e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // 2. GEP to the first element of the array. 15991e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall GEP.push_back(Zero); 160016d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson } 16011e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 16020f6ac7cf7bc6a02c1a5c19d2c90ec0d1dd7786e7Jay Foad Ptr = Builder.CreateInBoundsGEP(Ptr, GEP, "del.first"); 160316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson } 160416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1605eede61a83e90f3cb03ef8665b67d648dccd6ce42Douglas Gregor assert(ConvertTypeForMem(DeleteTy) == 1606eede61a83e90f3cb03ef8665b67d648dccd6ce42Douglas Gregor cast<llvm::PointerType>(Ptr->getType())->getElementType()); 16071e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 16081e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (E->isArrayForm()) { 16096ec278d1a354517e20f13a877481453ee7940c78John McCall EmitArrayDelete(*this, E, Ptr, DeleteTy); 16101e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } else { 1611a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor EmitObjectDelete(*this, E->getOperatorDelete(), Ptr, DeleteTy, 1612a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor E->isGlobalDelete()); 16131e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 161416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 161516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson EmitBlock(DeleteEnd); 161616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson} 1617c2e84ae9a6d25cea3e583c768e576b4c981ec028Mike Stump 16184bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlssonstatic llvm::Constant *getBadTypeidFn(CodeGenFunction &CGF) { 16194bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson // void __cxa_bad_typeid(); 16208b418685e9e4f02f4eb2a76e1ec063e07552b68dChris Lattner llvm::FunctionType *FTy = llvm::FunctionType::get(CGF.VoidTy, false); 16214bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson 16224bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson return CGF.CGM.CreateRuntimeFunction(FTy, "__cxa_bad_typeid"); 16234bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson} 16244bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson 16254bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlssonstatic void EmitBadTypeidCall(CodeGenFunction &CGF) { 1626ad3692bbe1874abafae1757a2b9d3bfa2249dc43Anders Carlsson llvm::Value *Fn = getBadTypeidFn(CGF); 1627bd7370a78604e9a20d698bfe328c1e43f12a0613John McCall CGF.EmitRuntimeCallOrInvoke(Fn).setDoesNotReturn(); 16284bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson CGF.Builder.CreateUnreachable(); 16294bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson} 16304bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson 16313f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlssonstatic llvm::Value *EmitTypeidFromVTable(CodeGenFunction &CGF, 16323f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson const Expr *E, 16332acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *StdTypeInfoPtrTy) { 16343f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // Get the vtable pointer. 16353f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson llvm::Value *ThisPtr = CGF.EmitLValue(E).getAddress(); 16363f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16373f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // C++ [expr.typeid]p2: 16383f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // If the glvalue expression is obtained by applying the unary * operator to 16393f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // a pointer and the pointer is a null pointer value, the typeid expression 16403f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // throws the std::bad_typeid exception. 16413f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E->IgnoreParens())) { 16423f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson if (UO->getOpcode() == UO_Deref) { 16433f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson llvm::BasicBlock *BadTypeidBlock = 16443f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson CGF.createBasicBlock("typeid.bad_typeid"); 16453f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson llvm::BasicBlock *EndBlock = 16463f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson CGF.createBasicBlock("typeid.end"); 16473f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16483f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson llvm::Value *IsNull = CGF.Builder.CreateIsNull(ThisPtr); 16493f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson CGF.Builder.CreateCondBr(IsNull, BadTypeidBlock, EndBlock); 16503f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16513f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson CGF.EmitBlock(BadTypeidBlock); 16523f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson EmitBadTypeidCall(CGF); 16533f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson CGF.EmitBlock(EndBlock); 16543f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson } 16553f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson } 16563f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16573f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson llvm::Value *Value = CGF.GetVTablePtr(ThisPtr, 16583f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson StdTypeInfoPtrTy->getPointerTo()); 16593f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16603f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // Load the type info. 16613f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson Value = CGF.Builder.CreateConstInBoundsGEP1_64(Value, -1ULL); 16623f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson return CGF.Builder.CreateLoad(Value); 16633f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson} 16643f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16653ad32c8d93eb65d1d4943d7df567fc9b4f55d137John McCallllvm::Value *CodeGenFunction::EmitCXXTypeidExpr(const CXXTypeidExpr *E) { 16662acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *StdTypeInfoPtrTy = 16673f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson ConvertType(E->getType())->getPointerTo(); 166831b7f52d8c8d459e80d2a72176cc7fcc4b7d8d38Anders Carlsson 16691d7088d1d9dc99e5478c0184a3e21cafef2a0b53Anders Carlsson if (E->isTypeOperand()) { 16701d7088d1d9dc99e5478c0184a3e21cafef2a0b53Anders Carlsson llvm::Constant *TypeInfo = 16711d7088d1d9dc99e5478c0184a3e21cafef2a0b53Anders Carlsson CGM.GetAddrOfRTTIDescriptor(E->getTypeOperand()); 16723f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson return Builder.CreateBitCast(TypeInfo, StdTypeInfoPtrTy); 16731d7088d1d9dc99e5478c0184a3e21cafef2a0b53Anders Carlsson } 16744bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson 16753f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // C++ [expr.typeid]p2: 16763f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // When typeid is applied to a glvalue expression whose type is a 16773f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // polymorphic class type, the result refers to a std::type_info object 16783f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // representing the type of the most derived object (that is, the dynamic 16793f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // type) to which the glvalue refers. 16800d729105ecb50a7e3cbe6e57c29149edfa5cf05aRichard Smith if (E->isPotentiallyEvaluated()) 16810d729105ecb50a7e3cbe6e57c29149edfa5cf05aRichard Smith return EmitTypeidFromVTable(*this, E->getExprOperand(), 16820d729105ecb50a7e3cbe6e57c29149edfa5cf05aRichard Smith StdTypeInfoPtrTy); 16833f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16843f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson QualType OperandTy = E->getExprOperand()->getType(); 16853f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson return Builder.CreateBitCast(CGM.GetAddrOfRTTIDescriptor(OperandTy), 16863f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson StdTypeInfoPtrTy); 1687c2e84ae9a6d25cea3e583c768e576b4c981ec028Mike Stump} 1688c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 1689f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlssonstatic llvm::Constant *getDynamicCastFn(CodeGenFunction &CGF) { 1690f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // void *__dynamic_cast(const void *sub, 1691f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // const abi::__class_type_info *src, 1692f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // const abi::__class_type_info *dst, 1693f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // std::ptrdiff_t src2dst_offset); 1694f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 16958b418685e9e4f02f4eb2a76e1ec063e07552b68dChris Lattner llvm::Type *Int8PtrTy = CGF.Int8PtrTy; 16969cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *PtrDiffTy = 1697f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CGF.ConvertType(CGF.getContext().getPointerDiffType()); 1698f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 16999cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *Args[4] = { Int8PtrTy, Int8PtrTy, Int8PtrTy, PtrDiffTy }; 170021f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer 170121f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer llvm::FunctionType *FTy = llvm::FunctionType::get(Int8PtrTy, Args, false); 170221f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer 170321f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer // Mark the function as nounwind readonly. 170421f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer llvm::Attribute::AttrKind FuncAttrs[] = { llvm::Attribute::NoUnwind, 170521f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer llvm::Attribute::ReadOnly }; 170621f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer llvm::AttributeSet Attrs = llvm::AttributeSet::get( 170721f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer CGF.getLLVMContext(), llvm::AttributeSet::FunctionIndex, FuncAttrs); 170821f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer 170921f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer return CGF.CGM.CreateRuntimeFunction(FTy, "__dynamic_cast", Attrs); 1710f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson} 1711f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1712f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlssonstatic llvm::Constant *getBadCastFn(CodeGenFunction &CGF) { 1713f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // void __cxa_bad_cast(); 17148b418685e9e4f02f4eb2a76e1ec063e07552b68dChris Lattner llvm::FunctionType *FTy = llvm::FunctionType::get(CGF.VoidTy, false); 1715f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson return CGF.CGM.CreateRuntimeFunction(FTy, "__cxa_bad_cast"); 1716f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson} 1717f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 17183ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlssonstatic void EmitBadCastCall(CodeGenFunction &CGF) { 1719ad3692bbe1874abafae1757a2b9d3bfa2249dc43Anders Carlsson llvm::Value *Fn = getBadCastFn(CGF); 1720bd7370a78604e9a20d698bfe328c1e43f12a0613John McCall CGF.EmitRuntimeCallOrInvoke(Fn).setDoesNotReturn(); 17213ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson CGF.Builder.CreateUnreachable(); 17223ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson} 17233ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 1724ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer/// \brief Compute the src2dst_offset hint as described in the 1725ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer/// Itanium C++ ABI [2.9.7] 1726ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramerstatic CharUnits computeOffsetHint(ASTContext &Context, 1727ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer const CXXRecordDecl *Src, 1728ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer const CXXRecordDecl *Dst) { 1729ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true, 1730ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer /*DetectVirtual=*/false); 1731ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1732ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // If Dst is not derived from Src we can skip the whole computation below and 1733ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // return that Src is not a public base of Dst. Record all inheritance paths. 1734ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer if (!Dst->isDerivedFrom(Src, Paths)) 1735ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer return CharUnits::fromQuantity(-2ULL); 1736ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1737ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer unsigned NumPublicPaths = 0; 1738ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer CharUnits Offset; 1739ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1740ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // Now walk all possible inheritance paths. 1741ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer for (CXXBasePaths::paths_iterator I = Paths.begin(), E = Paths.end(); 1742ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer I != E; ++I) { 1743ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer if (I->Access != AS_public) // Ignore non-public inheritance. 1744ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer continue; 1745ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1746ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer ++NumPublicPaths; 1747ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1748ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer for (CXXBasePath::iterator J = I->begin(), JE = I->end(); J != JE; ++J) { 1749ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // If the path contains a virtual base class we can't give any hint. 1750ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // -1: no hint. 1751ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer if (J->Base->isVirtual()) 1752ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer return CharUnits::fromQuantity(-1ULL); 1753ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1754ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer if (NumPublicPaths > 1) // Won't use offsets, skip computation. 1755ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer continue; 1756ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1757ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // Accumulate the base class offsets. 1758ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer const ASTRecordLayout &L = Context.getASTRecordLayout(J->Class); 1759ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer Offset += L.getBaseClassOffset(J->Base->getType()->getAsCXXRecordDecl()); 1760ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer } 1761ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer } 1762ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1763ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // -2: Src is not a public base of Dst. 1764ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer if (NumPublicPaths == 0) 1765ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer return CharUnits::fromQuantity(-2ULL); 1766ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1767ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // -3: Src is a multiple public base type but never a virtual base type. 1768ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer if (NumPublicPaths > 1) 1769ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer return CharUnits::fromQuantity(-3ULL); 1770ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1771ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // Otherwise, the Src type is a unique public nonvirtual base type of Dst. 1772ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // Return the offset of Src from the origin of Dst. 1773ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer return Offset; 1774ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer} 1775ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1776f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlssonstatic llvm::Value * 1777f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders CarlssonEmitDynamicCastCall(CodeGenFunction &CGF, llvm::Value *Value, 1778f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson QualType SrcTy, QualType DestTy, 1779f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::BasicBlock *CastEnd) { 17802acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *PtrDiffLTy = 1781f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CGF.ConvertType(CGF.getContext().getPointerDiffType()); 17822acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *DestLTy = CGF.ConvertType(DestTy); 1783f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1784f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (const PointerType *PTy = DestTy->getAs<PointerType>()) { 1785f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (PTy->getPointeeType()->isVoidType()) { 1786f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // C++ [expr.dynamic.cast]p7: 1787f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // If T is "pointer to cv void," then the result is a pointer to the 1788f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // most derived object pointed to by v. 1789f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1790f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // Get the vtable pointer. 1791f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::Value *VTable = CGF.GetVTablePtr(Value, PtrDiffLTy->getPointerTo()); 1792f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1793f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // Get the offset-to-top from the vtable. 1794f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::Value *OffsetToTop = 1795f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CGF.Builder.CreateConstInBoundsGEP1_64(VTable, -2ULL); 1796f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson OffsetToTop = CGF.Builder.CreateLoad(OffsetToTop, "offset.to.top"); 1797f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1798f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // Finally, add the offset to the pointer. 1799f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson Value = CGF.EmitCastToVoidPtr(Value); 1800f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson Value = CGF.Builder.CreateInBoundsGEP(Value, OffsetToTop); 1801f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1802f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson return CGF.Builder.CreateBitCast(Value, DestLTy); 1803f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson } 1804f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson } 1805f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1806f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson QualType SrcRecordTy; 1807f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson QualType DestRecordTy; 1808f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1809f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (const PointerType *DestPTy = DestTy->getAs<PointerType>()) { 1810f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson SrcRecordTy = SrcTy->castAs<PointerType>()->getPointeeType(); 1811f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson DestRecordTy = DestPTy->getPointeeType(); 1812c849c052d6b4b70f2651c1969531861a5f230053Mike Stump } else { 1813f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson SrcRecordTy = SrcTy; 1814f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson DestRecordTy = DestTy->castAs<ReferenceType>()->getPointeeType(); 1815c849c052d6b4b70f2651c1969531861a5f230053Mike Stump } 1816c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 1817f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson assert(SrcRecordTy->isRecordType() && "source type must be a record type!"); 1818f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson assert(DestRecordTy->isRecordType() && "dest type must be a record type!"); 1819f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1820f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::Value *SrcRTTI = 1821f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CGF.CGM.GetAddrOfRTTIDescriptor(SrcRecordTy.getUnqualifiedType()); 1822f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::Value *DestRTTI = 1823f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CGF.CGM.GetAddrOfRTTIDescriptor(DestRecordTy.getUnqualifiedType()); 1824f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1825ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // Compute the offset hint. 1826ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer const CXXRecordDecl *SrcDecl = SrcRecordTy->getAsCXXRecordDecl(); 1827ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer const CXXRecordDecl *DestDecl = DestRecordTy->getAsCXXRecordDecl(); 1828ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer llvm::Value *OffsetHint = 1829ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer llvm::ConstantInt::get(PtrDiffLTy, 1830ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer computeOffsetHint(CGF.getContext(), SrcDecl, 1831ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer DestDecl).getQuantity()); 1832f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1833f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // Emit the call to __dynamic_cast. 1834f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson Value = CGF.EmitCastToVoidPtr(Value); 1835bd7370a78604e9a20d698bfe328c1e43f12a0613John McCall 1836bd7370a78604e9a20d698bfe328c1e43f12a0613John McCall llvm::Value *args[] = { Value, SrcRTTI, DestRTTI, OffsetHint }; 1837bd7370a78604e9a20d698bfe328c1e43f12a0613John McCall Value = CGF.EmitNounwindRuntimeCall(getDynamicCastFn(CGF), args); 1838f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson Value = CGF.Builder.CreateBitCast(Value, DestLTy); 1839f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1840f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson /// C++ [expr.dynamic.cast]p9: 1841f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson /// A failed cast to reference type throws std::bad_cast 1842f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (DestTy->isReferenceType()) { 1843f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::BasicBlock *BadCastBlock = 1844f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CGF.createBasicBlock("dynamic_cast.bad_cast"); 1845f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1846f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::Value *IsNull = CGF.Builder.CreateIsNull(Value); 1847f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CGF.Builder.CreateCondBr(IsNull, BadCastBlock, CastEnd); 1848f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1849f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CGF.EmitBlock(BadCastBlock); 18503ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson EmitBadCastCall(CGF); 1851c849c052d6b4b70f2651c1969531861a5f230053Mike Stump } 1852c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 1853f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson return Value; 1854f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson} 1855f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 18563ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlssonstatic llvm::Value *EmitDynamicCastToNull(CodeGenFunction &CGF, 18573ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson QualType DestTy) { 18582acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *DestLTy = CGF.ConvertType(DestTy); 18593ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson if (DestTy->isPointerType()) 18603ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson return llvm::Constant::getNullValue(DestLTy); 18613ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 18623ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson /// C++ [expr.dynamic.cast]p9: 18633ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson /// A failed cast to reference type throws std::bad_cast 18643ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson EmitBadCastCall(CGF); 18653ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 18663ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson CGF.EmitBlock(CGF.createBasicBlock("dynamic_cast.end")); 18673ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson return llvm::UndefValue::get(DestLTy); 18683ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson} 18693ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 1870f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlssonllvm::Value *CodeGenFunction::EmitDynamicCast(llvm::Value *Value, 1871f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson const CXXDynamicCastExpr *DCE) { 1872f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson QualType DestTy = DCE->getTypeAsWritten(); 1873c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 18743ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson if (DCE->isAlwaysNull()) 18753ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson return EmitDynamicCastToNull(*this, DestTy); 18763ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 18773ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson QualType SrcTy = DCE->getSubExpr()->getType(); 18783ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 1879f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // C++ [expr.dynamic.cast]p4: 1880f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // If the value of v is a null pointer value in the pointer case, the result 1881f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // is the null pointer value of type T. 1882f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson bool ShouldNullCheckSrcValue = SrcTy->isPointerType(); 1883f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1884f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::BasicBlock *CastNull = 0; 1885f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::BasicBlock *CastNotNull = 0; 1886f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::BasicBlock *CastEnd = createBasicBlock("dynamic_cast.end"); 1887f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1888f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (ShouldNullCheckSrcValue) { 1889f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CastNull = createBasicBlock("dynamic_cast.null"); 1890f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CastNotNull = createBasicBlock("dynamic_cast.notnull"); 1891c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 1892f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::Value *IsNull = Builder.CreateIsNull(Value); 1893f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson Builder.CreateCondBr(IsNull, CastNull, CastNotNull); 1894f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson EmitBlock(CastNotNull); 1895c849c052d6b4b70f2651c1969531861a5f230053Mike Stump } 1896f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1897f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson Value = EmitDynamicCastCall(*this, Value, SrcTy, DestTy, CastEnd); 1898f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1899f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (ShouldNullCheckSrcValue) { 1900f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson EmitBranch(CastEnd); 1901f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1902f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson EmitBlock(CastNull); 1903f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson EmitBranch(CastEnd); 1904c849c052d6b4b70f2651c1969531861a5f230053Mike Stump } 1905f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1906f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson EmitBlock(CastEnd); 1907f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1908f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (ShouldNullCheckSrcValue) { 1909f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::PHINode *PHI = Builder.CreatePHI(Value->getType(), 2); 1910f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson PHI->addIncoming(Value, CastNotNull); 1911f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson PHI->addIncoming(llvm::Constant::getNullValue(Value->getType()), CastNull); 1912f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1913f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson Value = PHI; 1914c849c052d6b4b70f2651c1969531861a5f230053Mike Stump } 1915c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 1916f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson return Value; 1917c849c052d6b4b70f2651c1969531861a5f230053Mike Stump} 19184c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman 19194c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedmanvoid CodeGenFunction::EmitLambdaExpr(const LambdaExpr *E, AggValueSlot Slot) { 1920f8823e7ae00d2b0a9395b51b7bd53b505df72031Eli Friedman RunCleanupsScope Scope(*this); 1921377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman LValue SlotLV = MakeAddrLValue(Slot.getAddr(), E->getType(), 1922377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman Slot.getAlignment()); 1923f8823e7ae00d2b0a9395b51b7bd53b505df72031Eli Friedman 19244c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman CXXRecordDecl::field_iterator CurField = E->getLambdaClass()->field_begin(); 19254c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman for (LambdaExpr::capture_init_iterator i = E->capture_init_begin(), 19264c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman e = E->capture_init_end(); 1927c07b18ed2b207b17cf8d770966e5c1e52d46f4ecEric Christopher i != e; ++i, ++CurField) { 19284c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman // Emit initialization 1929377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman 1930581deb3da481053c4993c7600f97acf7768caac5David Blaikie LValue LV = EmitLValueForFieldInitialization(SlotLV, *CurField); 1931b74ed087469db042325bad76fdf3ff6ed67dec09Eli Friedman ArrayRef<VarDecl *> ArrayIndexes; 1932b74ed087469db042325bad76fdf3ff6ed67dec09Eli Friedman if (CurField->getType()->isArrayType()) 1933b74ed087469db042325bad76fdf3ff6ed67dec09Eli Friedman ArrayIndexes = E->getCaptureInitIndexVars(i); 1934581deb3da481053c4993c7600f97acf7768caac5David Blaikie EmitInitializerForField(*CurField, LV, *i, ArrayIndexes); 19354c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman } 19364c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman} 1937