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 1783b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson if (MD->isStatic()) { 1793b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // The method is static, emit it as we would a regular call. 1803b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson llvm::Value *Callee = CGM.GetAddrOfFunction(MD); 1813b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson return EmitCall(getContext().getPointerType(MD->getType()), Callee, 1823b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson ReturnValue, CE->arg_begin(), CE->arg_end()); 1833b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 1843b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 185fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall // Compute the object pointer. 186632fbaa22fbed7c090eb83775731bfff786c2198Rafael Espindola const Expr *Base = ME->getBase(); 187632fbaa22fbed7c090eb83775731bfff786c2198Rafael Espindola bool CanUseVirtualCall = MD->isVirtual() && !ME->hasQualifier(); 188632fbaa22fbed7c090eb83775731bfff786c2198Rafael Espindola 189ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola const CXXMethodDecl *DevirtualizedMethod = NULL; 190ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola if (CanUseVirtualCall && 191ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola canDevirtualizeMemberFunctionCalls(getContext(), Base, MD)) { 192ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola const CXXRecordDecl *BestDynamicDecl = Base->getBestDynamicClassType(); 193ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola DevirtualizedMethod = MD->getCorrespondingMethodInClass(BestDynamicDecl); 194ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola assert(DevirtualizedMethod); 195ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola const CXXRecordDecl *DevirtualizedClass = DevirtualizedMethod->getParent(); 196ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola const Expr *Inner = Base->ignoreParenBaseCasts(); 197ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola if (getCXXRecord(Inner) == DevirtualizedClass) 198ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // If the class of the Inner expression is where the dynamic method 199ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // is defined, build the this pointer from it. 200ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola Base = Inner; 201ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola else if (getCXXRecord(Base) != DevirtualizedClass) { 202ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // If the method is defined in a class that is not the best dynamic 203ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // one or the one of the full expression, we would have to build 204ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // a derived-to-base cast to compute the correct this pointer, but 205ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // we don't have support for that yet, so do a virtual call. 206ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola DevirtualizedMethod = NULL; 207ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola } 20880bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola // If the return types are not the same, this might be a case where more 20980bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola // code needs to run to compensate for it. For example, the derived 21080bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola // method might return a type that inherits form from the return 21180bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola // type of MD and has a prefix. 21280bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola // For now we just avoid devirtualizing these covariant cases. 21380bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola if (DevirtualizedMethod && 21480bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola DevirtualizedMethod->getResultType().getCanonicalType() != 21580bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola MD->getResultType().getCanonicalType()) 2164a889e47bd5a8d08a705a87962a35a504728d7f6Rafael Espindola DevirtualizedMethod = NULL; 217ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola } 218632fbaa22fbed7c090eb83775731bfff786c2198Rafael Espindola 2193b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson llvm::Value *This; 2203b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson if (ME->isArrow()) 221ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola This = EmitScalarExpr(Base); 2220e800c9c20d1a658a91096c756c4a4a9e90264fcJohn McCall else 223ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola This = EmitLValue(Base).getAddress(); 224632fbaa22fbed7c090eb83775731bfff786c2198Rafael Espindola 2253b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 226fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall if (MD->isTrivial()) { 227fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall if (isa<CXXDestructorDecl>(MD)) return RValue::get(0); 228dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet if (isa<CXXConstructorDecl>(MD) && 229dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet cast<CXXConstructorDecl>(MD)->isDefaultConstructor()) 230dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet return RValue::get(0); 231dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet 23285ea7aa961deac1d754f610af8062ae3f8b4e2a5Sebastian Redl if (MD->isCopyAssignmentOperator() || MD->isMoveAssignmentOperator()) { 23385ea7aa961deac1d754f610af8062ae3f8b4e2a5Sebastian Redl // We don't like to generate the trivial copy/move assignment operator 23485ea7aa961deac1d754f610af8062ae3f8b4e2a5Sebastian Redl // when it isn't necessary; just produce the proper effect here. 235dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet llvm::Value *RHS = EmitLValue(*CE->arg_begin()).getAddress(); 2366cacae8bf9597b8124cd40aedc189c04484e1990Benjamin Kramer EmitAggregateAssign(This, RHS, CE->getType()); 237dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet return RValue::get(This); 238dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet } 239dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet 240dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet if (isa<CXXConstructorDecl>(MD) && 24185ea7aa961deac1d754f610af8062ae3f8b4e2a5Sebastian Redl cast<CXXConstructorDecl>(MD)->isCopyOrMoveConstructor()) { 24285ea7aa961deac1d754f610af8062ae3f8b4e2a5Sebastian Redl // Trivial move and copy ctor are the same. 243dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet llvm::Value *RHS = EmitLValue(*CE->arg_begin()).getAddress(); 244dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet EmitSynthesizedCXXCopyCtorCall(cast<CXXConstructorDecl>(MD), This, RHS, 245dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet CE->arg_begin(), CE->arg_end()); 246dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet return RValue::get(This); 247dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet } 248dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet llvm_unreachable("unknown trivial member function"); 2493b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 2503b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 251fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall // Compute the function type we're calling. 252465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman const CXXMethodDecl *CalleeDecl = DevirtualizedMethod ? DevirtualizedMethod : MD; 253dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet const CGFunctionInfo *FInfo = 0; 254465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman if (const CXXDestructorDecl *Dtor = dyn_cast<CXXDestructorDecl>(CalleeDecl)) 255465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman FInfo = &CGM.getTypes().arrangeCXXDestructor(Dtor, 256de5d3c717684f3821b8db58037bc7140acf134aaJohn McCall Dtor_Complete); 257465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman else if (const CXXConstructorDecl *Ctor = dyn_cast<CXXConstructorDecl>(CalleeDecl)) 258465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman FInfo = &CGM.getTypes().arrangeCXXConstructorDeclaration(Ctor, 259465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman Ctor_Complete); 260dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet else 261465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman FInfo = &CGM.getTypes().arrangeCXXMethodDeclaration(CalleeDecl); 262fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall 263a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner llvm::FunctionType *Ty = CGM.getTypes().GetFunctionType(*FInfo); 264fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall 2653b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // C++ [class.virtual]p12: 2663b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Explicit qualification with the scope operator (5.1) suppresses the 2673b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // virtual call mechanism. 2683b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // 2693b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // We also don't emit a virtual call if the base expression has a record type 2703b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // because then we know what the type is. 271ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola bool UseVirtualCall = CanUseVirtualCall && !DevirtualizedMethod; 2723258abc2bad74e8bb1799d124bc4113c7234fa42Stephen Lin llvm::Value *Callee; 2733b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin 274fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall if (const CXXDestructorDecl *Dtor = dyn_cast<CXXDestructorDecl>(MD)) { 2753b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin assert(CE->arg_begin() == CE->arg_end() && 2763b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin "Destructor shouldn't have explicit parameters"); 2773b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin assert(ReturnValue.isNull() && "Destructor shouldn't have return value"); 278fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall if (UseVirtualCall) { 2793b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin CGM.getCXXABI().EmitVirtualDestructorCall(*this, Dtor, Dtor_Complete, 2803b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin CE->getExprLoc(), This); 2813b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } else { 2827edf9e38b91917b661277601c0e448eef0eb2b56Richard Smith if (getLangOpts().AppleKext && 283ccd5259d33cbbdd6f5fbf7ccab4cb4a2702309eaFariborz Jahanian MD->isVirtual() && 284ccd5259d33cbbdd6f5fbf7ccab4cb4a2702309eaFariborz Jahanian ME->hasQualifier()) 285771c678c04f5f685b4f188ec6c2fd88ad0f7457fFariborz Jahanian Callee = BuildAppleKextVirtualCall(MD, ME->getQualifier(), Ty); 286ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola else if (!DevirtualizedMethod) 287a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner Callee = CGM.GetAddrOfCXXDestructor(Dtor, Dtor_Complete, FInfo, Ty); 2880b4fe503ef00d9f8ea330850d3e3b303e9c7c876Rafael Espindola else { 289ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola const CXXDestructorDecl *DDtor = 290ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola cast<CXXDestructorDecl>(DevirtualizedMethod); 2910b4fe503ef00d9f8ea330850d3e3b303e9c7c876Rafael Espindola Callee = CGM.GetAddrOfFunction(GlobalDecl(DDtor, Dtor_Complete), Ty); 2920b4fe503ef00d9f8ea330850d3e3b303e9c7c876Rafael Espindola } 2933b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin EmitCXXMemberCall(MD, CE->getExprLoc(), Callee, ReturnValue, This, 2943b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin /*ImplicitParam=*/0, QualType(), 0, 0); 2953b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 2963b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin return RValue::get(0); 2973b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin } 2983b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin 2993b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin if (const CXXConstructorDecl *Ctor = dyn_cast<CXXConstructorDecl>(MD)) { 300dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet Callee = CGM.GetAddrOfFunction(GlobalDecl(Ctor, Ctor_Complete), Ty); 301fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall } else if (UseVirtualCall) { 3023b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin Callee = BuildVirtualCall(MD, This, Ty); 3033b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } else { 3047edf9e38b91917b661277601c0e448eef0eb2b56Richard Smith if (getLangOpts().AppleKext && 305a50e33eb0ff7b73d44aebce88de3732583a7e960Fariborz Jahanian MD->isVirtual() && 3067ac0ff2a8791280102a557761dbb931deb21a1dcFariborz Jahanian ME->hasQualifier()) 307771c678c04f5f685b4f188ec6c2fd88ad0f7457fFariborz Jahanian Callee = BuildAppleKextVirtualCall(MD, ME->getQualifier(), Ty); 308ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola else if (!DevirtualizedMethod) 30912582bdc2e1fca260eb2437d87dab5302c37bab2Rafael Espindola Callee = CGM.GetAddrOfFunction(MD, Ty); 3100b4fe503ef00d9f8ea330850d3e3b303e9c7c876Rafael Espindola else { 311ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola Callee = CGM.GetAddrOfFunction(DevirtualizedMethod, Ty); 3120b4fe503ef00d9f8ea330850d3e3b303e9c7c876Rafael Espindola } 3133b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 3143b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3154def70d3040e73707c738f7c366737a986135edfRichard Smith return EmitCXXMemberCall(MD, CE->getExprLoc(), Callee, ReturnValue, This, 31659660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov /*ImplicitParam=*/0, QualType(), 31759660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov CE->arg_begin(), CE->arg_end()); 3183b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson} 3193b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3203b5ad2283c999f6edf7d42332a655447b7386b2eAnders CarlssonRValue 3213b5ad2283c999f6edf7d42332a655447b7386b2eAnders CarlssonCodeGenFunction::EmitCXXMemberPointerCallExpr(const CXXMemberCallExpr *E, 3223b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson ReturnValueSlot ReturnValue) { 3233b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const BinaryOperator *BO = 3243b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson cast<BinaryOperator>(E->getCallee()->IgnoreParens()); 3253b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const Expr *BaseExpr = BO->getLHS(); 3263b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const Expr *MemFnExpr = BO->getRHS(); 3273b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3283b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const MemberPointerType *MPT = 329864c041e118155c2b1ce0ba36942a3da5a4a055eJohn McCall MemFnExpr->getType()->castAs<MemberPointerType>(); 33093d557bc1867b7d7b102f87290194b4be7932c92John McCall 3313b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const FunctionProtoType *FPT = 332864c041e118155c2b1ce0ba36942a3da5a4a055eJohn McCall MPT->getPointeeType()->castAs<FunctionProtoType>(); 3333b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const CXXRecordDecl *RD = 3343b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson cast<CXXRecordDecl>(MPT->getClass()->getAs<RecordType>()->getDecl()); 3353b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3363b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Get the member function pointer. 337d608cdb7c044365cf4e8764ade1e11e99c176078John McCall llvm::Value *MemFnPtr = EmitScalarExpr(MemFnExpr); 3383b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3393b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Emit the 'this' pointer. 3403b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson llvm::Value *This; 3413b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3422de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (BO->getOpcode() == BO_PtrMemI) 3433b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson This = EmitScalarExpr(BaseExpr); 3443b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson else 3453b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson This = EmitLValue(BaseExpr).getAddress(); 3463b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3474def70d3040e73707c738f7c366737a986135edfRichard Smith EmitTypeCheck(TCK_MemberCall, E->getExprLoc(), This, 3484def70d3040e73707c738f7c366737a986135edfRichard Smith QualType(MPT->getClass(), 0)); 3492c9f87ca5cccbfdaad82762368af5b2323320653Richard Smith 35093d557bc1867b7d7b102f87290194b4be7932c92John McCall // Ask the ABI to load the callee. Note that This is modified. 35193d557bc1867b7d7b102f87290194b4be7932c92John McCall llvm::Value *Callee = 352d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall CGM.getCXXABI().EmitLoadOfMemberFunctionPointer(*this, This, MemFnPtr, MPT); 3533b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3543b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson CallArgList Args; 3553b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3563b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson QualType ThisType = 3573b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson getContext().getPointerType(getContext().getTagDeclType(RD)); 3583b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3593b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Push the this ptr. 36004c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman Args.add(RValue::get(This), ThisType); 3610f3d0970dcdf6cf17550b86838dff12813968dbcJohn McCall 3620f3d0970dcdf6cf17550b86838dff12813968dbcJohn McCall RequiredArgs required = RequiredArgs::forPrototypePlus(FPT, 1); 3633b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3643b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // And the rest of the call args 3653b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson EmitCallArgs(Args, FPT, E->arg_begin(), E->arg_end()); 3660f3d0970dcdf6cf17550b86838dff12813968dbcJohn McCall return EmitCall(CGM.getTypes().arrangeCXXMethodCall(Args, FPT, required), Callee, 3679c6082fe89c61af697f017aa80937581cc2128d8Tilmann Scheller ReturnValue, Args); 3683b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson} 3693b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3703b5ad2283c999f6edf7d42332a655447b7386b2eAnders CarlssonRValue 3713b5ad2283c999f6edf7d42332a655447b7386b2eAnders CarlssonCodeGenFunction::EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E, 3723b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const CXXMethodDecl *MD, 3733b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson ReturnValueSlot ReturnValue) { 3743b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson assert(MD->isInstance() && 3753b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson "Trying to emit a member call expr on a static method!"); 3760e800c9c20d1a658a91096c756c4a4a9e90264fcJohn McCall LValue LV = EmitLValue(E->getArg(0)); 3770e800c9c20d1a658a91096c756c4a4a9e90264fcJohn McCall llvm::Value *This = LV.getAddress(); 3780e800c9c20d1a658a91096c756c4a4a9e90264fcJohn McCall 379b2b5658a8e4ad566303ec98caceaa3485e7635f7Douglas Gregor if ((MD->isCopyAssignmentOperator() || MD->isMoveAssignmentOperator()) && 380b2b5658a8e4ad566303ec98caceaa3485e7635f7Douglas Gregor MD->isTrivial()) { 381b2b5658a8e4ad566303ec98caceaa3485e7635f7Douglas Gregor llvm::Value *Src = EmitLValue(E->getArg(1)).getAddress(); 382b2b5658a8e4ad566303ec98caceaa3485e7635f7Douglas Gregor QualType Ty = E->getType(); 3836cacae8bf9597b8124cd40aedc189c04484e1990Benjamin Kramer EmitAggregateAssign(This, Src, Ty); 384b2b5658a8e4ad566303ec98caceaa3485e7635f7Douglas Gregor return RValue::get(This); 3853b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 3863b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 387a2447e0d1e28669cd637204a871f15b1215277fdAnders Carlsson llvm::Value *Callee = EmitCXXOperatorMemberCallee(E, MD, This); 3884def70d3040e73707c738f7c366737a986135edfRichard Smith return EmitCXXMemberCall(MD, E->getExprLoc(), Callee, ReturnValue, This, 38959660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov /*ImplicitParam=*/0, QualType(), 39059660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov E->arg_begin() + 1, E->arg_end()); 3913b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson} 3923b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3936c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter CollingbourneRValue CodeGenFunction::EmitCUDAKernelCallExpr(const CUDAKernelCallExpr *E, 3946c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne ReturnValueSlot ReturnValue) { 3956c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne return CGM.getCUDARuntime().EmitCUDAKernelCallExpr(*this, E, ReturnValue); 3966c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne} 3976c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne 3982ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedmanstatic void EmitNullBaseClassInitialization(CodeGenFunction &CGF, 3992ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::Value *DestPtr, 4002ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman const CXXRecordDecl *Base) { 4012ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman if (Base->isEmpty()) 4022ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman return; 4032ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 4042ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman DestPtr = CGF.EmitCastToVoidPtr(DestPtr); 4052ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 4062ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman const ASTRecordLayout &Layout = CGF.getContext().getASTRecordLayout(Base); 4072ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman CharUnits Size = Layout.getNonVirtualSize(); 4082ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman CharUnits Align = Layout.getNonVirtualAlign(); 4092ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 4102ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::Value *SizeVal = CGF.CGM.getSize(Size); 4112ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 4122ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // If the type contains a pointer to data member we can't memset it to zero. 4132ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // Instead, create a null constant and copy it to the destination. 4142ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // TODO: there are other patterns besides zero that we can usefully memset, 4152ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // like -1, which happens to be the pattern used by member-pointers. 4162ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // TODO: isZeroInitializable can be over-conservative in the case where a 4172ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // virtual base contains a member pointer. 4182ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman if (!CGF.CGM.getTypes().isZeroInitializable(Base)) { 4192ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::Constant *NullConstant = CGF.CGM.EmitNullConstantForBase(Base); 4202ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 4212ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::GlobalVariable *NullVariable = 4222ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman new llvm::GlobalVariable(CGF.CGM.getModule(), NullConstant->getType(), 4232ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman /*isConstant=*/true, 4242ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::GlobalVariable::PrivateLinkage, 4252ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman NullConstant, Twine()); 4262ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman NullVariable->setAlignment(Align.getQuantity()); 4272ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::Value *SrcPtr = CGF.EmitCastToVoidPtr(NullVariable); 4282ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 4292ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // Get and call the appropriate llvm.memcpy overload. 4302ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman CGF.Builder.CreateMemCpy(DestPtr, SrcPtr, SizeVal, Align.getQuantity()); 4312ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman return; 4322ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman } 4332ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 4342ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // Otherwise, just memset the whole thing to zero. This is legal 4352ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // because in LLVM, all default initializers (other than the ones we just 4362ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // handled above) are guaranteed to have a bit pattern of all zeros. 4372ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman CGF.Builder.CreateMemSet(DestPtr, CGF.Builder.getInt8(0), SizeVal, 4382ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman Align.getQuantity()); 4392ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman} 4402ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 4413b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlssonvoid 442558d2abc7f9fd6801cc7677200992313ae90b5d8John McCallCodeGenFunction::EmitCXXConstructExpr(const CXXConstructExpr *E, 443558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall AggValueSlot Dest) { 444558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall assert(!Dest.isIgnored() && "Must have a destination!"); 4453b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const CXXConstructorDecl *CD = E->getConstructor(); 446759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor 447759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor // If we require zero initialization before (or instead of) calling the 448759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor // constructor, as can be the case with a non-user-provided default 449657baf19ca8a48a926bd3bc148b6ad1b17e53199Argyrios Kyrtzidis // constructor, emit the zero initialization now, unless destination is 450657baf19ca8a48a926bd3bc148b6ad1b17e53199Argyrios Kyrtzidis // already zeroed. 4512ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman if (E->requiresZeroInitialization() && !Dest.isZeroed()) { 4522ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman switch (E->getConstructionKind()) { 4532ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman case CXXConstructExpr::CK_Delegating: 4542ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman case CXXConstructExpr::CK_Complete: 4552ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman EmitNullInitialization(Dest.getAddr(), E->getType()); 4562ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman break; 4572ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman case CXXConstructExpr::CK_VirtualBase: 4582ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman case CXXConstructExpr::CK_NonVirtualBase: 4592ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman EmitNullBaseClassInitialization(*this, Dest.getAddr(), CD->getParent()); 4602ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman break; 4612ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman } 4622ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman } 463759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor 464759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor // If this is a call to a trivial default constructor, do nothing. 465759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor if (CD->isTrivial() && CD->isDefaultConstructor()) 466759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor return; 467759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor 468fc1e6c79bbfe0e9a58bb792996d51f42e36e3d6aJohn McCall // Elide the constructor if we're constructing from a temporary. 469fc1e6c79bbfe0e9a58bb792996d51f42e36e3d6aJohn McCall // The temporary check is required because Sema sets this on NRVO 470fc1e6c79bbfe0e9a58bb792996d51f42e36e3d6aJohn McCall // returns. 4717edf9e38b91917b661277601c0e448eef0eb2b56Richard Smith if (getLangOpts().ElideConstructors && E->isElidable()) { 472fc1e6c79bbfe0e9a58bb792996d51f42e36e3d6aJohn McCall assert(getContext().hasSameUnqualifiedType(E->getType(), 473fc1e6c79bbfe0e9a58bb792996d51f42e36e3d6aJohn McCall E->getArg(0)->getType())); 474558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall if (E->getArg(0)->isTemporaryObject(getContext(), CD->getParent())) { 475558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall EmitAggExpr(E->getArg(0), Dest); 4763c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor return; 4773c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor } 4783b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 479759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor 480c3c0766277cd64bf117450a1519c9cf762d994d4John McCall if (const ConstantArrayType *arrayType 481c3c0766277cd64bf117450a1519c9cf762d994d4John McCall = getContext().getAsConstantArrayType(E->getType())) { 482c3c0766277cd64bf117450a1519c9cf762d994d4John McCall EmitCXXAggrConstructorCall(CD, arrayType, Dest.getAddr(), 4833b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson E->arg_begin(), E->arg_end()); 484c3c0766277cd64bf117450a1519c9cf762d994d4John McCall } else { 4856bd2f6ad857949d4dfb6e75e0760c61950b917cfCameron Esfahani CXXCtorType Type = Ctor_Complete; 486d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt bool ForVirtualBase = false; 487378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor bool Delegating = false; 488378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor 489d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt switch (E->getConstructionKind()) { 490d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt case CXXConstructExpr::CK_Delegating: 491059ce0d92eb5a7da900ae735dc0a2ea3d64f4b0bSean Hunt // We should be emitting a constructor; GlobalDecl will assert this 492059ce0d92eb5a7da900ae735dc0a2ea3d64f4b0bSean Hunt Type = CurGD.getCtorType(); 493378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor Delegating = true; 494d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt break; 495059ce0d92eb5a7da900ae735dc0a2ea3d64f4b0bSean Hunt 496d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt case CXXConstructExpr::CK_Complete: 497d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt Type = Ctor_Complete; 498d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt break; 499d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt 500d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt case CXXConstructExpr::CK_VirtualBase: 501d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt ForVirtualBase = true; 502d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt // fall-through 503d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt 504d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt case CXXConstructExpr::CK_NonVirtualBase: 505d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt Type = Ctor_Base; 506d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt } 507155ed4a23366f4514befb1c9f5f89d16f8b8b6dbAnders Carlsson 5083b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Call the constructor. 509378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor EmitCXXConstructorCall(CD, Type, ForVirtualBase, Delegating, Dest.getAddr(), 5103b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson E->arg_begin(), E->arg_end()); 511155ed4a23366f4514befb1c9f5f89d16f8b8b6dbAnders Carlsson } 5123b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson} 5133b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 51434999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanianvoid 51534999876e215b22febc240b1a6dc054215d12f9cFariborz JahanianCodeGenFunction::EmitSynthesizedCXXCopyCtor(llvm::Value *Dest, 51634999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian llvm::Value *Src, 517830937bc1100fba7682f7c32c40512085870f50cFariborz Jahanian const Expr *Exp) { 5184765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall if (const ExprWithCleanups *E = dyn_cast<ExprWithCleanups>(Exp)) 51934999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian Exp = E->getSubExpr(); 52034999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian assert(isa<CXXConstructExpr>(Exp) && 52134999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian "EmitSynthesizedCXXCopyCtor - unknown copy ctor expr"); 52234999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian const CXXConstructExpr* E = cast<CXXConstructExpr>(Exp); 52334999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian const CXXConstructorDecl *CD = E->getConstructor(); 52434999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian RunCleanupsScope Scope(*this); 52534999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian 52634999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian // If we require zero initialization before (or instead of) calling the 52734999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian // constructor, as can be the case with a non-user-provided default 52834999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian // constructor, emit the zero initialization now. 52934999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian // FIXME. Do I still need this for a copy ctor synthesis? 53034999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian if (E->requiresZeroInitialization()) 53134999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian EmitNullInitialization(Dest, E->getType()); 53234999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian 533858a546d8fe73b07f2296313bef2e30445ea164bChandler Carruth assert(!getContext().getAsConstantArrayType(E->getType()) 534858a546d8fe73b07f2296313bef2e30445ea164bChandler Carruth && "EmitSynthesizedCXXCopyCtor - Copied-in Array"); 53534999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian EmitSynthesizedCXXCopyCtorCall(CD, Dest, Src, 53634999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian E->arg_begin(), E->arg_end()); 53734999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian} 53834999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian 5391e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCallstatic CharUnits CalculateCookiePadding(CodeGenFunction &CGF, 5401e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const CXXNewExpr *E) { 541871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson if (!E->isArray()) 542caf647c33ad74621c352c21d6c50d149ba49e89dKen Dyck return CharUnits::Zero(); 543871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson 544b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // No cookie is required if the operator new[] being used is the 545b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // reserved placement operator new[]. 546b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall if (E->getOperatorNew()->isReservedGlobalPlacementOperator()) 5475172ed92b42f0bc6a022542a08f7b18af821bcb3John McCall return CharUnits::Zero(); 5485172ed92b42f0bc6a022542a08f7b18af821bcb3John McCall 5496ec278d1a354517e20f13a877481453ee7940c78John McCall return CGF.CGM.getCXXABI().GetArrayCookieSize(E); 550a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson} 551a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 5527d16627081caede9691a6f46b796da4073ac14adJohn McCallstatic llvm::Value *EmitCXXNewAllocSize(CodeGenFunction &CGF, 5537d16627081caede9691a6f46b796da4073ac14adJohn McCall const CXXNewExpr *e, 5549203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl unsigned minElements, 5557d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *&numElements, 5567d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *&sizeWithoutCookie) { 5577d16627081caede9691a6f46b796da4073ac14adJohn McCall QualType type = e->getAllocatedType(); 5587d16627081caede9691a6f46b796da4073ac14adJohn McCall 5597d16627081caede9691a6f46b796da4073ac14adJohn McCall if (!e->isArray()) { 5607d16627081caede9691a6f46b796da4073ac14adJohn McCall CharUnits typeSize = CGF.getContext().getTypeSizeInChars(type); 5617d16627081caede9691a6f46b796da4073ac14adJohn McCall sizeWithoutCookie 5627d16627081caede9691a6f46b796da4073ac14adJohn McCall = llvm::ConstantInt::get(CGF.SizeTy, typeSize.getQuantity()); 5637d16627081caede9691a6f46b796da4073ac14adJohn McCall return sizeWithoutCookie; 56459174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor } 565a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 5667d16627081caede9691a6f46b796da4073ac14adJohn McCall // The width of size_t. 5677d16627081caede9691a6f46b796da4073ac14adJohn McCall unsigned sizeWidth = CGF.SizeTy->getBitWidth(); 5687d16627081caede9691a6f46b796da4073ac14adJohn McCall 5691e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Figure out the cookie size. 5707d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt cookieSize(sizeWidth, 5717d16627081caede9691a6f46b796da4073ac14adJohn McCall CalculateCookiePadding(CGF, e).getQuantity()); 5721e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 573a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson // Emit the array size expression. 574e7ab92e1d62f9c243bbd1f42f72a7b3c2666d33eArgyrios Kyrtzidis // We multiply the size of all dimensions for NumElements. 575e7ab92e1d62f9c243bbd1f42f72a7b3c2666d33eArgyrios Kyrtzidis // e.g for 'int[2][3]', ElemType is 'int' and NumElements is 6. 5767d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = CGF.EmitScalarExpr(e->getArraySize()); 5777d16627081caede9691a6f46b796da4073ac14adJohn McCall assert(isa<llvm::IntegerType>(numElements->getType())); 5787d16627081caede9691a6f46b796da4073ac14adJohn McCall 5797d16627081caede9691a6f46b796da4073ac14adJohn McCall // The number of elements can be have an arbitrary integer type; 5807d16627081caede9691a6f46b796da4073ac14adJohn McCall // essentially, we need to multiply it by a constant factor, add a 5817d16627081caede9691a6f46b796da4073ac14adJohn McCall // cookie size, and verify that the result is representable as a 5827d16627081caede9691a6f46b796da4073ac14adJohn McCall // size_t. That's just a gloss, though, and it's wrong in one 5837d16627081caede9691a6f46b796da4073ac14adJohn McCall // important way: if the count is negative, it's an error even if 5847d16627081caede9691a6f46b796da4073ac14adJohn McCall // the cookie size would bring the total size >= 0. 585575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor bool isSigned 586575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor = e->getArraySize()->getType()->isSignedIntegerOrEnumerationType(); 5872acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::IntegerType *numElementsType 5887d16627081caede9691a6f46b796da4073ac14adJohn McCall = cast<llvm::IntegerType>(numElements->getType()); 5897d16627081caede9691a6f46b796da4073ac14adJohn McCall unsigned numElementsWidth = numElementsType->getBitWidth(); 5907d16627081caede9691a6f46b796da4073ac14adJohn McCall 5917d16627081caede9691a6f46b796da4073ac14adJohn McCall // Compute the constant factor. 5927d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt arraySizeMultiplier(sizeWidth, 1); 593e7ab92e1d62f9c243bbd1f42f72a7b3c2666d33eArgyrios Kyrtzidis while (const ConstantArrayType *CAT 5947d16627081caede9691a6f46b796da4073ac14adJohn McCall = CGF.getContext().getAsConstantArrayType(type)) { 5957d16627081caede9691a6f46b796da4073ac14adJohn McCall type = CAT->getElementType(); 5967d16627081caede9691a6f46b796da4073ac14adJohn McCall arraySizeMultiplier *= CAT->getSize(); 597e7ab92e1d62f9c243bbd1f42f72a7b3c2666d33eArgyrios Kyrtzidis } 598e7ab92e1d62f9c243bbd1f42f72a7b3c2666d33eArgyrios Kyrtzidis 5997d16627081caede9691a6f46b796da4073ac14adJohn McCall CharUnits typeSize = CGF.getContext().getTypeSizeInChars(type); 6007d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt typeSizeMultiplier(sizeWidth, typeSize.getQuantity()); 6017d16627081caede9691a6f46b796da4073ac14adJohn McCall typeSizeMultiplier *= arraySizeMultiplier; 6027d16627081caede9691a6f46b796da4073ac14adJohn McCall 6037d16627081caede9691a6f46b796da4073ac14adJohn McCall // This will be a size_t. 6047d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *size; 6056c552c1d5f47fbba00e6268d96a26ad026f2da2aChris Lattner 606806941eab5e1d62d7676e5cdc0e1d9e397ea78b4Chris Lattner // If someone is doing 'new int[42]' there is no need to do a dynamic check. 607806941eab5e1d62d7676e5cdc0e1d9e397ea78b4Chris Lattner // Don't bloat the -O0 code. 6087d16627081caede9691a6f46b796da4073ac14adJohn McCall if (llvm::ConstantInt *numElementsC = 6097d16627081caede9691a6f46b796da4073ac14adJohn McCall dyn_cast<llvm::ConstantInt>(numElements)) { 6107d16627081caede9691a6f46b796da4073ac14adJohn McCall const llvm::APInt &count = numElementsC->getValue(); 6117d16627081caede9691a6f46b796da4073ac14adJohn McCall 6127d16627081caede9691a6f46b796da4073ac14adJohn McCall bool hasAnyOverflow = false; 6137d16627081caede9691a6f46b796da4073ac14adJohn McCall 6147d16627081caede9691a6f46b796da4073ac14adJohn McCall // If 'count' was a negative number, it's an overflow. 6157d16627081caede9691a6f46b796da4073ac14adJohn McCall if (isSigned && count.isNegative()) 6167d16627081caede9691a6f46b796da4073ac14adJohn McCall hasAnyOverflow = true; 6177d16627081caede9691a6f46b796da4073ac14adJohn McCall 6187d16627081caede9691a6f46b796da4073ac14adJohn McCall // We want to do all this arithmetic in size_t. If numElements is 6197d16627081caede9691a6f46b796da4073ac14adJohn McCall // wider than that, check whether it's already too big, and if so, 6207d16627081caede9691a6f46b796da4073ac14adJohn McCall // overflow. 6217d16627081caede9691a6f46b796da4073ac14adJohn McCall else if (numElementsWidth > sizeWidth && 6227d16627081caede9691a6f46b796da4073ac14adJohn McCall numElementsWidth - sizeWidth > count.countLeadingZeros()) 6237d16627081caede9691a6f46b796da4073ac14adJohn McCall hasAnyOverflow = true; 6247d16627081caede9691a6f46b796da4073ac14adJohn McCall 6257d16627081caede9691a6f46b796da4073ac14adJohn McCall // Okay, compute a count at the right width. 6267d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt adjustedCount = count.zextOrTrunc(sizeWidth); 6277d16627081caede9691a6f46b796da4073ac14adJohn McCall 6289203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // If there is a brace-initializer, we cannot allocate fewer elements than 6299203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // there are initializers. If we do, that's treated like an overflow. 6309203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (adjustedCount.ult(minElements)) 6319203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl hasAnyOverflow = true; 6329203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 6337d16627081caede9691a6f46b796da4073ac14adJohn McCall // Scale numElements by that. This might overflow, but we don't 6347d16627081caede9691a6f46b796da4073ac14adJohn McCall // care because it only overflows if allocationSize does, too, and 6357d16627081caede9691a6f46b796da4073ac14adJohn McCall // if that overflows then we shouldn't use this. 6367d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = llvm::ConstantInt::get(CGF.SizeTy, 6377d16627081caede9691a6f46b796da4073ac14adJohn McCall adjustedCount * arraySizeMultiplier); 6387d16627081caede9691a6f46b796da4073ac14adJohn McCall 6397d16627081caede9691a6f46b796da4073ac14adJohn McCall // Compute the size before cookie, and track whether it overflowed. 6407d16627081caede9691a6f46b796da4073ac14adJohn McCall bool overflow; 6417d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt allocationSize 6427d16627081caede9691a6f46b796da4073ac14adJohn McCall = adjustedCount.umul_ov(typeSizeMultiplier, overflow); 6437d16627081caede9691a6f46b796da4073ac14adJohn McCall hasAnyOverflow |= overflow; 6447d16627081caede9691a6f46b796da4073ac14adJohn McCall 6457d16627081caede9691a6f46b796da4073ac14adJohn McCall // Add in the cookie, and check whether it's overflowed. 6467d16627081caede9691a6f46b796da4073ac14adJohn McCall if (cookieSize != 0) { 6477d16627081caede9691a6f46b796da4073ac14adJohn McCall // Save the current size without a cookie. This shouldn't be 6487d16627081caede9691a6f46b796da4073ac14adJohn McCall // used if there was overflow. 6497d16627081caede9691a6f46b796da4073ac14adJohn McCall sizeWithoutCookie = llvm::ConstantInt::get(CGF.SizeTy, allocationSize); 6507d16627081caede9691a6f46b796da4073ac14adJohn McCall 6517d16627081caede9691a6f46b796da4073ac14adJohn McCall allocationSize = allocationSize.uadd_ov(cookieSize, overflow); 6527d16627081caede9691a6f46b796da4073ac14adJohn McCall hasAnyOverflow |= overflow; 6531e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 6547d16627081caede9691a6f46b796da4073ac14adJohn McCall 6557d16627081caede9691a6f46b796da4073ac14adJohn McCall // On overflow, produce a -1 so operator new will fail. 6567d16627081caede9691a6f46b796da4073ac14adJohn McCall if (hasAnyOverflow) { 6577d16627081caede9691a6f46b796da4073ac14adJohn McCall size = llvm::Constant::getAllOnesValue(CGF.SizeTy); 658806941eab5e1d62d7676e5cdc0e1d9e397ea78b4Chris Lattner } else { 6597d16627081caede9691a6f46b796da4073ac14adJohn McCall size = llvm::ConstantInt::get(CGF.SizeTy, allocationSize); 660806941eab5e1d62d7676e5cdc0e1d9e397ea78b4Chris Lattner } 6611e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 6627d16627081caede9691a6f46b796da4073ac14adJohn McCall // Otherwise, we might need to use the overflow intrinsics. 6637d16627081caede9691a6f46b796da4073ac14adJohn McCall } else { 6649203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // There are up to five conditions we need to test for: 6657d16627081caede9691a6f46b796da4073ac14adJohn McCall // 1) if isSigned, we need to check whether numElements is negative; 6667d16627081caede9691a6f46b796da4073ac14adJohn McCall // 2) if numElementsWidth > sizeWidth, we need to check whether 6677d16627081caede9691a6f46b796da4073ac14adJohn McCall // numElements is larger than something representable in size_t; 6689203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // 3) if minElements > 0, we need to check whether numElements is smaller 6699203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // than that. 6709203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // 4) we need to compute 6717d16627081caede9691a6f46b796da4073ac14adJohn McCall // sizeWithoutCookie := numElements * typeSizeMultiplier 6727d16627081caede9691a6f46b796da4073ac14adJohn McCall // and check whether it overflows; and 6739203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // 5) if we need a cookie, we need to compute 6747d16627081caede9691a6f46b796da4073ac14adJohn McCall // size := sizeWithoutCookie + cookieSize 6757d16627081caede9691a6f46b796da4073ac14adJohn McCall // and check whether it overflows. 6767d16627081caede9691a6f46b796da4073ac14adJohn McCall 6777d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *hasOverflow = 0; 6787d16627081caede9691a6f46b796da4073ac14adJohn McCall 6797d16627081caede9691a6f46b796da4073ac14adJohn McCall // If numElementsWidth > sizeWidth, then one way or another, we're 6807d16627081caede9691a6f46b796da4073ac14adJohn McCall // going to have to do a comparison for (2), and this happens to 6817d16627081caede9691a6f46b796da4073ac14adJohn McCall // take care of (1), too. 6827d16627081caede9691a6f46b796da4073ac14adJohn McCall if (numElementsWidth > sizeWidth) { 6837d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt threshold(numElementsWidth, 1); 6847d16627081caede9691a6f46b796da4073ac14adJohn McCall threshold <<= sizeWidth; 6857d16627081caede9691a6f46b796da4073ac14adJohn McCall 6867d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *thresholdV 6877d16627081caede9691a6f46b796da4073ac14adJohn McCall = llvm::ConstantInt::get(numElementsType, threshold); 6887d16627081caede9691a6f46b796da4073ac14adJohn McCall 6897d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = CGF.Builder.CreateICmpUGE(numElements, thresholdV); 6907d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = CGF.Builder.CreateTrunc(numElements, CGF.SizeTy); 6917d16627081caede9691a6f46b796da4073ac14adJohn McCall 6927d16627081caede9691a6f46b796da4073ac14adJohn McCall // Otherwise, if we're signed, we want to sext up to size_t. 6937d16627081caede9691a6f46b796da4073ac14adJohn McCall } else if (isSigned) { 6947d16627081caede9691a6f46b796da4073ac14adJohn McCall if (numElementsWidth < sizeWidth) 6957d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = CGF.Builder.CreateSExt(numElements, CGF.SizeTy); 6967d16627081caede9691a6f46b796da4073ac14adJohn McCall 6977d16627081caede9691a6f46b796da4073ac14adJohn McCall // If there's a non-1 type size multiplier, then we can do the 6987d16627081caede9691a6f46b796da4073ac14adJohn McCall // signedness check at the same time as we do the multiply 6997d16627081caede9691a6f46b796da4073ac14adJohn McCall // because a negative number times anything will cause an 7009203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // unsigned overflow. Otherwise, we have to do it here. But at least 7019203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // in this case, we can subsume the >= minElements check. 7027d16627081caede9691a6f46b796da4073ac14adJohn McCall if (typeSizeMultiplier == 1) 7037d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = CGF.Builder.CreateICmpSLT(numElements, 7049203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl llvm::ConstantInt::get(CGF.SizeTy, minElements)); 7057d16627081caede9691a6f46b796da4073ac14adJohn McCall 7067d16627081caede9691a6f46b796da4073ac14adJohn McCall // Otherwise, zext up to size_t if necessary. 7077d16627081caede9691a6f46b796da4073ac14adJohn McCall } else if (numElementsWidth < sizeWidth) { 7087d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = CGF.Builder.CreateZExt(numElements, CGF.SizeTy); 7097d16627081caede9691a6f46b796da4073ac14adJohn McCall } 7101e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 7117d16627081caede9691a6f46b796da4073ac14adJohn McCall assert(numElements->getType() == CGF.SizeTy); 7121e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 7139203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (minElements) { 7149203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // Don't allow allocation of fewer elements than we have initializers. 7159203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (!hasOverflow) { 7169203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl hasOverflow = CGF.Builder.CreateICmpULT(numElements, 7179203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl llvm::ConstantInt::get(CGF.SizeTy, minElements)); 7189203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } else if (numElementsWidth > sizeWidth) { 7199203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // The other existing overflow subsumes this check. 7209203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // We do an unsigned comparison, since any signed value < -1 is 7219203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // taken care of either above or below. 7229203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl hasOverflow = CGF.Builder.CreateOr(hasOverflow, 7239203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl CGF.Builder.CreateICmpULT(numElements, 7249203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl llvm::ConstantInt::get(CGF.SizeTy, minElements))); 7259203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } 7269203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } 7279203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 7287d16627081caede9691a6f46b796da4073ac14adJohn McCall size = numElements; 7291e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 7307d16627081caede9691a6f46b796da4073ac14adJohn McCall // Multiply by the type size if necessary. This multiplier 7317d16627081caede9691a6f46b796da4073ac14adJohn McCall // includes all the factors for nested arrays. 7327d16627081caede9691a6f46b796da4073ac14adJohn McCall // 7337d16627081caede9691a6f46b796da4073ac14adJohn McCall // This step also causes numElements to be scaled up by the 7347d16627081caede9691a6f46b796da4073ac14adJohn McCall // nested-array factor if necessary. Overflow on this computation 7357d16627081caede9691a6f46b796da4073ac14adJohn McCall // can be ignored because the result shouldn't be used if 7367d16627081caede9691a6f46b796da4073ac14adJohn McCall // allocation fails. 7377d16627081caede9691a6f46b796da4073ac14adJohn McCall if (typeSizeMultiplier != 1) { 7387d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *umul_with_overflow 7398dd55a3c3b28d195717c87bbc60e765951d408feBenjamin Kramer = CGF.CGM.getIntrinsic(llvm::Intrinsic::umul_with_overflow, CGF.SizeTy); 7407d16627081caede9691a6f46b796da4073ac14adJohn McCall 7417d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *tsmV = 7427d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::ConstantInt::get(CGF.SizeTy, typeSizeMultiplier); 7437d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *result = 7447d16627081caede9691a6f46b796da4073ac14adJohn McCall CGF.Builder.CreateCall2(umul_with_overflow, size, tsmV); 7457d16627081caede9691a6f46b796da4073ac14adJohn McCall 7467d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *overflowed = CGF.Builder.CreateExtractValue(result, 1); 7477d16627081caede9691a6f46b796da4073ac14adJohn McCall if (hasOverflow) 7487d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = CGF.Builder.CreateOr(hasOverflow, overflowed); 7497d16627081caede9691a6f46b796da4073ac14adJohn McCall else 7507d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = overflowed; 7517d16627081caede9691a6f46b796da4073ac14adJohn McCall 7527d16627081caede9691a6f46b796da4073ac14adJohn McCall size = CGF.Builder.CreateExtractValue(result, 0); 7537d16627081caede9691a6f46b796da4073ac14adJohn McCall 7547d16627081caede9691a6f46b796da4073ac14adJohn McCall // Also scale up numElements by the array size multiplier. 7557d16627081caede9691a6f46b796da4073ac14adJohn McCall if (arraySizeMultiplier != 1) { 7567d16627081caede9691a6f46b796da4073ac14adJohn McCall // If the base element type size is 1, then we can re-use the 7577d16627081caede9691a6f46b796da4073ac14adJohn McCall // multiply we just did. 7587d16627081caede9691a6f46b796da4073ac14adJohn McCall if (typeSize.isOne()) { 7597d16627081caede9691a6f46b796da4073ac14adJohn McCall assert(arraySizeMultiplier == typeSizeMultiplier); 7607d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = size; 7617d16627081caede9691a6f46b796da4073ac14adJohn McCall 7627d16627081caede9691a6f46b796da4073ac14adJohn McCall // Otherwise we need a separate multiply. 7637d16627081caede9691a6f46b796da4073ac14adJohn McCall } else { 7647d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *asmV = 7657d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::ConstantInt::get(CGF.SizeTy, arraySizeMultiplier); 7667d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = CGF.Builder.CreateMul(numElements, asmV); 7677d16627081caede9691a6f46b796da4073ac14adJohn McCall } 7687d16627081caede9691a6f46b796da4073ac14adJohn McCall } 7697d16627081caede9691a6f46b796da4073ac14adJohn McCall } else { 7707d16627081caede9691a6f46b796da4073ac14adJohn McCall // numElements doesn't need to be scaled. 7717d16627081caede9691a6f46b796da4073ac14adJohn McCall assert(arraySizeMultiplier == 1); 7721e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 7737d16627081caede9691a6f46b796da4073ac14adJohn McCall 7747d16627081caede9691a6f46b796da4073ac14adJohn McCall // Add in the cookie size if necessary. 7757d16627081caede9691a6f46b796da4073ac14adJohn McCall if (cookieSize != 0) { 7767d16627081caede9691a6f46b796da4073ac14adJohn McCall sizeWithoutCookie = size; 7777d16627081caede9691a6f46b796da4073ac14adJohn McCall 7787d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *uadd_with_overflow 7798dd55a3c3b28d195717c87bbc60e765951d408feBenjamin Kramer = CGF.CGM.getIntrinsic(llvm::Intrinsic::uadd_with_overflow, CGF.SizeTy); 7807d16627081caede9691a6f46b796da4073ac14adJohn McCall 7817d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *cookieSizeV = llvm::ConstantInt::get(CGF.SizeTy, cookieSize); 7827d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *result = 7837d16627081caede9691a6f46b796da4073ac14adJohn McCall CGF.Builder.CreateCall2(uadd_with_overflow, size, cookieSizeV); 7847d16627081caede9691a6f46b796da4073ac14adJohn McCall 7857d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *overflowed = CGF.Builder.CreateExtractValue(result, 1); 7867d16627081caede9691a6f46b796da4073ac14adJohn McCall if (hasOverflow) 7877d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = CGF.Builder.CreateOr(hasOverflow, overflowed); 7887d16627081caede9691a6f46b796da4073ac14adJohn McCall else 7897d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = overflowed; 7901e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 7917d16627081caede9691a6f46b796da4073ac14adJohn McCall size = CGF.Builder.CreateExtractValue(result, 0); 7921e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 7931e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 7947d16627081caede9691a6f46b796da4073ac14adJohn McCall // If we had any possibility of dynamic overflow, make a select to 7957d16627081caede9691a6f46b796da4073ac14adJohn McCall // overwrite 'size' with an all-ones value, which should cause 7967d16627081caede9691a6f46b796da4073ac14adJohn McCall // operator new to throw. 7977d16627081caede9691a6f46b796da4073ac14adJohn McCall if (hasOverflow) 7987d16627081caede9691a6f46b796da4073ac14adJohn McCall size = CGF.Builder.CreateSelect(hasOverflow, 7997d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Constant::getAllOnesValue(CGF.SizeTy), 8007d16627081caede9691a6f46b796da4073ac14adJohn McCall size); 801806941eab5e1d62d7676e5cdc0e1d9e397ea78b4Chris Lattner } 8021e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 8037d16627081caede9691a6f46b796da4073ac14adJohn McCall if (cookieSize == 0) 8047d16627081caede9691a6f46b796da4073ac14adJohn McCall sizeWithoutCookie = size; 8051e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall else 8067d16627081caede9691a6f46b796da4073ac14adJohn McCall assert(sizeWithoutCookie && "didn't set sizeWithoutCookie?"); 8071e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 8087d16627081caede9691a6f46b796da4073ac14adJohn McCall return size; 809a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson} 810a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 8119203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redlstatic void StoreAnyExprIntoOneUnit(CodeGenFunction &CGF, const Expr *Init, 8129203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl QualType AllocType, llvm::Value *NewPtr) { 81391a16fa3265686b90054715eea504d9b4a13438bDaniel Dunbar 814d7722d9d76a851e7897f4127626616d3b1b8e530Eli Friedman CharUnits Alignment = CGF.getContext().getTypeAlignInChars(AllocType); 8159d232c884ea9872d6555df0fd7359699819bc1f1John McCall switch (CGF.getEvaluationKind(AllocType)) { 8169d232c884ea9872d6555df0fd7359699819bc1f1John McCall case TEK_Scalar: 817d7722d9d76a851e7897f4127626616d3b1b8e530Eli Friedman CGF.EmitScalarInit(Init, 0, CGF.MakeAddrLValue(NewPtr, AllocType, 8186da2c716017d5c8530ec99779524491ebc5dadb8Eli Friedman Alignment), 819a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall false); 8209d232c884ea9872d6555df0fd7359699819bc1f1John McCall return; 8219d232c884ea9872d6555df0fd7359699819bc1f1John McCall case TEK_Complex: 8229d232c884ea9872d6555df0fd7359699819bc1f1John McCall CGF.EmitComplexExprIntoLValue(Init, CGF.MakeAddrLValue(NewPtr, AllocType, 8239d232c884ea9872d6555df0fd7359699819bc1f1John McCall Alignment), 8249d232c884ea9872d6555df0fd7359699819bc1f1John McCall /*isInit*/ true); 8259d232c884ea9872d6555df0fd7359699819bc1f1John McCall return; 8269d232c884ea9872d6555df0fd7359699819bc1f1John McCall case TEK_Aggregate: { 827558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall AggValueSlot Slot 828f394078fde147dcf27e9b6a7965517388d64dcb6Eli Friedman = AggValueSlot::forAddr(NewPtr, Alignment, AllocType.getQualifiers(), 8297c2349be2d11143a2e59a167fd43362a3bf4585eJohn McCall AggValueSlot::IsDestructed, 8304418439220a8f8e0b1deffdccce2354854c702f5John McCall AggValueSlot::DoesNotNeedGCBarriers, 831649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier AggValueSlot::IsNotAliased); 832558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall CGF.EmitAggExpr(Init, Slot); 8339d232c884ea9872d6555df0fd7359699819bc1f1John McCall return; 8349d232c884ea9872d6555df0fd7359699819bc1f1John McCall } 835558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall } 8369d232c884ea9872d6555df0fd7359699819bc1f1John McCall llvm_unreachable("bad evaluation kind"); 837ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanian} 838ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanian 839ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanianvoid 840ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz JahanianCodeGenFunction::EmitNewArrayInitializer(const CXXNewExpr *E, 841197056726ed6412501130c2ef2ff69009772aa65John McCall QualType elementType, 842197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::Value *beginPtr, 843197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::Value *numElements) { 8442aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl if (!E->hasInitializer()) 8452aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl return; // We have a POD type. 846197056726ed6412501130c2ef2ff69009772aa65John McCall 8479203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl llvm::Value *explicitPtr = beginPtr; 848197056726ed6412501130c2ef2ff69009772aa65John McCall // Find the end of the array, hoisted out of the loop. 849197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::Value *endPtr = 850197056726ed6412501130c2ef2ff69009772aa65John McCall Builder.CreateInBoundsGEP(beginPtr, numElements, "array.end"); 851197056726ed6412501130c2ef2ff69009772aa65John McCall 8529203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl unsigned initializerElements = 0; 8539203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 8549203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl const Expr *Init = E->getInitializer(); 855577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier llvm::AllocaInst *endOfInit = 0; 856577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier QualType::DestructionKind dtorKind = elementType.isDestructedType(); 857577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier EHScopeStack::stable_iterator cleanup; 858577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier llvm::Instruction *cleanupDominator = 0; 8599203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // If the initializer is an initializer list, first do the explicit elements. 8609203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (const InitListExpr *ILE = dyn_cast<InitListExpr>(Init)) { 8619203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl initializerElements = ILE->getNumInits(); 862577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier 863577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // Enter a partial-destruction cleanup if necessary. 864577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier if (needsEHCleanup(dtorKind)) { 865577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // In principle we could tell the cleanup where we are more 866577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // directly, but the control flow can get so varied here that it 867577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // would actually be quite complex. Therefore we go through an 868577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // alloca. 869577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier endOfInit = CreateTempAlloca(beginPtr->getType(), "array.endOfInit"); 870577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier cleanupDominator = Builder.CreateStore(beginPtr, endOfInit); 871577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier pushIrregularPartialArrayCleanup(beginPtr, endOfInit, elementType, 872577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier getDestroyer(dtorKind)); 873577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier cleanup = EHStack.stable_begin(); 874577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier } 875577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier 8769203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl for (unsigned i = 0, e = ILE->getNumInits(); i != e; ++i) { 877577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // Tell the cleanup that it needs to destroy up to this 878577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // element. TODO: some of these stores can be trivially 879577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // observed to be unnecessary. 880577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier if (endOfInit) Builder.CreateStore(explicitPtr, endOfInit); 8819203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl StoreAnyExprIntoOneUnit(*this, ILE->getInit(i), elementType, explicitPtr); 8829203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl explicitPtr =Builder.CreateConstGEP1_32(explicitPtr, 1, "array.exp.next"); 8839203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } 8849203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 8859203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // The remaining elements are filled with the array filler expression. 8869203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl Init = ILE->getArrayFiller(); 8879203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } 8889203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 889197056726ed6412501130c2ef2ff69009772aa65John McCall // Create the continuation block. 890197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::BasicBlock *contBB = createBasicBlock("new.loop.end"); 891197056726ed6412501130c2ef2ff69009772aa65John McCall 8929203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // If the number of elements isn't constant, we have to now check if there is 8939203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // anything left to initialize. 8949203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (llvm::ConstantInt *constNum = dyn_cast<llvm::ConstantInt>(numElements)) { 8959203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // If all elements have already been initialized, skip the whole loop. 896577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier if (constNum->getZExtValue() <= initializerElements) { 897577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // If there was a cleanup, deactivate it. 898577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier if (cleanupDominator) 8991ad23d62007162df82b58bca31b4aa277a5f6586Dmitri Gribenko DeactivateCleanupBlock(cleanup, cleanupDominator); 900577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier return; 901577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier } 9029203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } else { 903197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::BasicBlock *nonEmptyBB = createBasicBlock("new.loop.nonempty"); 9049203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl llvm::Value *isEmpty = Builder.CreateICmpEQ(explicitPtr, endPtr, 905197056726ed6412501130c2ef2ff69009772aa65John McCall "array.isempty"); 906197056726ed6412501130c2ef2ff69009772aa65John McCall Builder.CreateCondBr(isEmpty, contBB, nonEmptyBB); 907197056726ed6412501130c2ef2ff69009772aa65John McCall EmitBlock(nonEmptyBB); 908197056726ed6412501130c2ef2ff69009772aa65John McCall } 909197056726ed6412501130c2ef2ff69009772aa65John McCall 910197056726ed6412501130c2ef2ff69009772aa65John McCall // Enter the loop. 911197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::BasicBlock *entryBB = Builder.GetInsertBlock(); 912197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::BasicBlock *loopBB = createBasicBlock("new.loop"); 913197056726ed6412501130c2ef2ff69009772aa65John McCall 914197056726ed6412501130c2ef2ff69009772aa65John McCall EmitBlock(loopBB); 915197056726ed6412501130c2ef2ff69009772aa65John McCall 916197056726ed6412501130c2ef2ff69009772aa65John McCall // Set up the current-element phi. 917197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::PHINode *curPtr = 9189203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl Builder.CreatePHI(explicitPtr->getType(), 2, "array.cur"); 9199203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl curPtr->addIncoming(explicitPtr, entryBB); 920197056726ed6412501130c2ef2ff69009772aa65John McCall 921577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // Store the new cleanup position for irregular cleanups. 922577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier if (endOfInit) Builder.CreateStore(curPtr, endOfInit); 923577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier 924197056726ed6412501130c2ef2ff69009772aa65John McCall // Enter a partial-destruction cleanup if necessary. 925577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier if (!cleanupDominator && needsEHCleanup(dtorKind)) { 926197056726ed6412501130c2ef2ff69009772aa65John McCall pushRegularPartialArrayCleanup(beginPtr, curPtr, elementType, 927197056726ed6412501130c2ef2ff69009772aa65John McCall getDestroyer(dtorKind)); 928197056726ed6412501130c2ef2ff69009772aa65John McCall cleanup = EHStack.stable_begin(); 9296f103ba42cb69d50005a977c5ea583984ab63fc4John McCall cleanupDominator = Builder.CreateUnreachable(); 930197056726ed6412501130c2ef2ff69009772aa65John McCall } 931197056726ed6412501130c2ef2ff69009772aa65John McCall 932197056726ed6412501130c2ef2ff69009772aa65John McCall // Emit the initializer into this element. 9339203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl StoreAnyExprIntoOneUnit(*this, Init, E->getAllocatedType(), curPtr); 934197056726ed6412501130c2ef2ff69009772aa65John McCall 935197056726ed6412501130c2ef2ff69009772aa65John McCall // Leave the cleanup if we entered one. 93640563cd5ea402b7a0db13058ee869a77cd1ab5eeEli Friedman if (cleanupDominator) { 9376f103ba42cb69d50005a977c5ea583984ab63fc4John McCall DeactivateCleanupBlock(cleanup, cleanupDominator); 9386f103ba42cb69d50005a977c5ea583984ab63fc4John McCall cleanupDominator->eraseFromParent(); 9396f103ba42cb69d50005a977c5ea583984ab63fc4John McCall } 940197056726ed6412501130c2ef2ff69009772aa65John McCall 941197056726ed6412501130c2ef2ff69009772aa65John McCall // Advance to the next element. 942197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::Value *nextPtr = Builder.CreateConstGEP1_32(curPtr, 1, "array.next"); 943197056726ed6412501130c2ef2ff69009772aa65John McCall 944197056726ed6412501130c2ef2ff69009772aa65John McCall // Check whether we've gotten to the end of the array and, if so, 945197056726ed6412501130c2ef2ff69009772aa65John McCall // exit the loop. 946197056726ed6412501130c2ef2ff69009772aa65John McCall llvm::Value *isEnd = Builder.CreateICmpEQ(nextPtr, endPtr, "array.atend"); 947197056726ed6412501130c2ef2ff69009772aa65John McCall Builder.CreateCondBr(isEnd, contBB, loopBB); 948197056726ed6412501130c2ef2ff69009772aa65John McCall curPtr->addIncoming(nextPtr, Builder.GetInsertBlock()); 949197056726ed6412501130c2ef2ff69009772aa65John McCall 950197056726ed6412501130c2ef2ff69009772aa65John McCall EmitBlock(contBB); 951ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanian} 952ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanian 95359174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregorstatic void EmitZeroMemSet(CodeGenFunction &CGF, QualType T, 95459174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor llvm::Value *NewPtr, llvm::Value *Size) { 955d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall CGF.EmitCastToVoidPtr(NewPtr); 956fe71008c2764768f25478b16c1802755189ed7c9Ken Dyck CharUnits Alignment = CGF.getContext().getTypeAlignInChars(T); 9579f0c7cc36d29cf591c33962931f5862847145f3eBenjamin Kramer CGF.Builder.CreateMemSet(NewPtr, CGF.Builder.getInt8(0), Size, 958fe71008c2764768f25478b16c1802755189ed7c9Ken Dyck Alignment.getQuantity(), false); 95959174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor} 96059174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor 961a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlssonstatic void EmitNewInitializer(CodeGenFunction &CGF, const CXXNewExpr *E, 962197056726ed6412501130c2ef2ff69009772aa65John McCall QualType ElementType, 963a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson llvm::Value *NewPtr, 96459174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor llvm::Value *NumElements, 96559174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor llvm::Value *AllocSizeWithoutCookie) { 9662aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl const Expr *Init = E->getInitializer(); 9675d4d946ec2d88696fd8422aeb64dc29688e6a2c1Anders Carlsson if (E->isArray()) { 9682aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl if (const CXXConstructExpr *CCE = dyn_cast_or_null<CXXConstructExpr>(Init)){ 9692aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl CXXConstructorDecl *Ctor = CCE->getConstructor(); 970887ddf39b365320fdf8dde923287bf52bb3c6a38Douglas Gregor if (Ctor->isTrivial()) { 97159174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor // If new expression did not specify value-initialization, then there 97259174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor // is no initialization. 9732aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl if (!CCE->requiresZeroInitialization() || Ctor->getParent()->isEmpty()) 97459174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor return; 97559174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor 976197056726ed6412501130c2ef2ff69009772aa65John McCall if (CGF.CGM.getTypes().isZeroInitializable(ElementType)) { 97759174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor // Optimization: since zero initialization will just set the memory 97859174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor // to all zeroes, generate a single memset to do it in one shot. 979197056726ed6412501130c2ef2ff69009772aa65John McCall EmitZeroMemSet(CGF, ElementType, NewPtr, AllocSizeWithoutCookie); 98059174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor return; 98159174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor } 98259174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor } 983c3c0766277cd64bf117450a1519c9cf762d994d4John McCall 9842aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl CGF.EmitCXXAggrConstructorCall(Ctor, NumElements, NewPtr, 9852aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl CCE->arg_begin(), CCE->arg_end(), 986b41ba1aa47a66979df578074de3c218d820c152dEli Friedman CCE->requiresZeroInitialization()); 987e99bdb6969ec16d2829ccdf62b04a8c8eda8b215Anders Carlsson return; 9882aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl } else if (Init && isa<ImplicitValueInitExpr>(Init) && 98940563cd5ea402b7a0db13058ee869a77cd1ab5eeEli Friedman CGF.CGM.getTypes().isZeroInitializable(ElementType)) { 99059174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor // Optimization: since zero initialization will just set the memory 99159174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor // to all zeroes, generate a single memset to do it in one shot. 992197056726ed6412501130c2ef2ff69009772aa65John McCall EmitZeroMemSet(CGF, ElementType, NewPtr, AllocSizeWithoutCookie); 993197056726ed6412501130c2ef2ff69009772aa65John McCall return; 994ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanian } 9952aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl CGF.EmitNewArrayInitializer(E, ElementType, NewPtr, NumElements); 9962aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl return; 9975d4d946ec2d88696fd8422aeb64dc29688e6a2c1Anders Carlsson } 998a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 9992aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl if (!Init) 10005304c953c1ccba4772ee77ce6526fff14ef5a16cFariborz Jahanian return; 10012aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl 10029203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl StoreAnyExprIntoOneUnit(CGF, Init, E->getAllocatedType(), NewPtr); 1003a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson} 1004a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 1005ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith/// Emit a call to an operator new or operator delete function, as implicitly 1006ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith/// created by new-expressions and delete-expressions. 1007ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smithstatic RValue EmitNewDeleteCall(CodeGenFunction &CGF, 1008ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith const FunctionDecl *Callee, 1009ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith const FunctionProtoType *CalleeType, 1010ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith const CallArgList &Args) { 1011ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith llvm::Instruction *CallOrInvoke; 1012060cb4a28c9d0cb15c7a9bd5de2164685629ad9cRichard Smith llvm::Value *CalleeAddr = CGF.CGM.GetAddrOfFunction(Callee); 1013ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith RValue RV = 1014ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith CGF.EmitCall(CGF.CGM.getTypes().arrangeFreeFunctionCall(Args, CalleeType), 1015060cb4a28c9d0cb15c7a9bd5de2164685629ad9cRichard Smith CalleeAddr, ReturnValueSlot(), Args, 1016ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith Callee, &CallOrInvoke); 1017ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith 1018ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith /// C++1y [expr.new]p10: 1019ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith /// [In a new-expression,] an implementation is allowed to omit a call 1020ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith /// to a replaceable global allocation function. 1021ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith /// 1022ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith /// We model such elidable calls with the 'builtin' attribute. 1023060cb4a28c9d0cb15c7a9bd5de2164685629ad9cRichard Smith llvm::Function *Fn = dyn_cast<llvm::Function>(CalleeAddr); 1024060cb4a28c9d0cb15c7a9bd5de2164685629ad9cRichard Smith if (Callee->isReplaceableGlobalAllocationFunction() && 1025060cb4a28c9d0cb15c7a9bd5de2164685629ad9cRichard Smith Fn && Fn->hasFnAttribute(llvm::Attribute::NoBuiltin)) { 1026ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith // FIXME: Add addAttribute to CallSite. 1027ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith if (llvm::CallInst *CI = dyn_cast<llvm::CallInst>(CallOrInvoke)) 1028ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith CI->addAttribute(llvm::AttributeSet::FunctionIndex, 1029ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith llvm::Attribute::Builtin); 1030ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith else if (llvm::InvokeInst *II = dyn_cast<llvm::InvokeInst>(CallOrInvoke)) 1031ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith II->addAttribute(llvm::AttributeSet::FunctionIndex, 1032ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith llvm::Attribute::Builtin); 1033ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith else 1034ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith llvm_unreachable("unexpected kind of call instruction"); 1035ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith } 1036ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith 1037ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith return RV; 1038ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith} 1039ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith 10407d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCallnamespace { 10417d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall /// A cleanup to call the given 'operator delete' function upon 10427d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall /// abnormal exit from a new expression. 10437d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall class CallDeleteDuringNew : public EHScopeStack::Cleanup { 10447d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall size_t NumPlacementArgs; 10457d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall const FunctionDecl *OperatorDelete; 10467d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall llvm::Value *Ptr; 10477d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall llvm::Value *AllocSize; 10487d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10497d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall RValue *getPlacementArgs() { return reinterpret_cast<RValue*>(this+1); } 10507d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10517d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall public: 10527d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall static size_t getExtraSize(size_t NumPlacementArgs) { 10537d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall return NumPlacementArgs * sizeof(RValue); 10547d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall } 10557d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10567d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall CallDeleteDuringNew(size_t NumPlacementArgs, 10577d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall const FunctionDecl *OperatorDelete, 10587d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall llvm::Value *Ptr, 10597d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall llvm::Value *AllocSize) 10607d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall : NumPlacementArgs(NumPlacementArgs), OperatorDelete(OperatorDelete), 10617d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall Ptr(Ptr), AllocSize(AllocSize) {} 10627d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10637d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall void setPlacementArg(unsigned I, RValue Arg) { 10647d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall assert(I < NumPlacementArgs && "index out of range"); 10657d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall getPlacementArgs()[I] = Arg; 10667d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall } 10677d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 1068ad346f4f678ab1c3222425641d851dc63e9dfa1aJohn McCall void Emit(CodeGenFunction &CGF, Flags flags) { 10697d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall const FunctionProtoType *FPT 10707d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall = OperatorDelete->getType()->getAs<FunctionProtoType>(); 10717d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall assert(FPT->getNumArgs() == NumPlacementArgs + 1 || 1072c384636f9a405b687990564b204b98e360c81587John McCall (FPT->getNumArgs() == 2 && NumPlacementArgs == 0)); 10737d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10747d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall CallArgList DeleteArgs; 10757d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10767d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // The first argument is always a void*. 10777d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall FunctionProtoType::arg_type_iterator AI = FPT->arg_type_begin(); 107804c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RValue::get(Ptr), *AI++); 10797d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10807d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // A member 'operator delete' can take an extra 'size_t' argument. 10817d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall if (FPT->getNumArgs() == NumPlacementArgs + 2) 108204c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RValue::get(AllocSize), *AI++); 10837d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10847d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // Pass the rest of the arguments, which must match exactly. 10857d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall for (unsigned I = 0; I != NumPlacementArgs; ++I) 108604c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(getPlacementArgs()[I], *AI++); 10877d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10887d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // Call 'operator delete'. 1089ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith EmitNewDeleteCall(CGF, OperatorDelete, FPT, DeleteArgs); 10907d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall } 10917d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall }; 10923019c444c672938c57f5573840071ecd73425ee7John McCall 10933019c444c672938c57f5573840071ecd73425ee7John McCall /// A cleanup to call the given 'operator delete' function upon 10943019c444c672938c57f5573840071ecd73425ee7John McCall /// abnormal exit from a new expression when the new expression is 10953019c444c672938c57f5573840071ecd73425ee7John McCall /// conditional. 10963019c444c672938c57f5573840071ecd73425ee7John McCall class CallDeleteDuringConditionalNew : public EHScopeStack::Cleanup { 10973019c444c672938c57f5573840071ecd73425ee7John McCall size_t NumPlacementArgs; 10983019c444c672938c57f5573840071ecd73425ee7John McCall const FunctionDecl *OperatorDelete; 1099804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type Ptr; 1100804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type AllocSize; 11013019c444c672938c57f5573840071ecd73425ee7John McCall 1102804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type *getPlacementArgs() { 1103804b807ea918184d6de63bd745e1ff75a9bfc679John McCall return reinterpret_cast<DominatingValue<RValue>::saved_type*>(this+1); 11043019c444c672938c57f5573840071ecd73425ee7John McCall } 11053019c444c672938c57f5573840071ecd73425ee7John McCall 11063019c444c672938c57f5573840071ecd73425ee7John McCall public: 11073019c444c672938c57f5573840071ecd73425ee7John McCall static size_t getExtraSize(size_t NumPlacementArgs) { 1108804b807ea918184d6de63bd745e1ff75a9bfc679John McCall return NumPlacementArgs * sizeof(DominatingValue<RValue>::saved_type); 11093019c444c672938c57f5573840071ecd73425ee7John McCall } 11103019c444c672938c57f5573840071ecd73425ee7John McCall 11113019c444c672938c57f5573840071ecd73425ee7John McCall CallDeleteDuringConditionalNew(size_t NumPlacementArgs, 11123019c444c672938c57f5573840071ecd73425ee7John McCall const FunctionDecl *OperatorDelete, 1113804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type Ptr, 1114804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type AllocSize) 11153019c444c672938c57f5573840071ecd73425ee7John McCall : NumPlacementArgs(NumPlacementArgs), OperatorDelete(OperatorDelete), 11163019c444c672938c57f5573840071ecd73425ee7John McCall Ptr(Ptr), AllocSize(AllocSize) {} 11173019c444c672938c57f5573840071ecd73425ee7John McCall 1118804b807ea918184d6de63bd745e1ff75a9bfc679John McCall void setPlacementArg(unsigned I, DominatingValue<RValue>::saved_type Arg) { 11193019c444c672938c57f5573840071ecd73425ee7John McCall assert(I < NumPlacementArgs && "index out of range"); 11203019c444c672938c57f5573840071ecd73425ee7John McCall getPlacementArgs()[I] = Arg; 11213019c444c672938c57f5573840071ecd73425ee7John McCall } 11223019c444c672938c57f5573840071ecd73425ee7John McCall 1123ad346f4f678ab1c3222425641d851dc63e9dfa1aJohn McCall void Emit(CodeGenFunction &CGF, Flags flags) { 11243019c444c672938c57f5573840071ecd73425ee7John McCall const FunctionProtoType *FPT 11253019c444c672938c57f5573840071ecd73425ee7John McCall = OperatorDelete->getType()->getAs<FunctionProtoType>(); 11263019c444c672938c57f5573840071ecd73425ee7John McCall assert(FPT->getNumArgs() == NumPlacementArgs + 1 || 11273019c444c672938c57f5573840071ecd73425ee7John McCall (FPT->getNumArgs() == 2 && NumPlacementArgs == 0)); 11283019c444c672938c57f5573840071ecd73425ee7John McCall 11293019c444c672938c57f5573840071ecd73425ee7John McCall CallArgList DeleteArgs; 11303019c444c672938c57f5573840071ecd73425ee7John McCall 11313019c444c672938c57f5573840071ecd73425ee7John McCall // The first argument is always a void*. 11323019c444c672938c57f5573840071ecd73425ee7John McCall FunctionProtoType::arg_type_iterator AI = FPT->arg_type_begin(); 113304c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(Ptr.restore(CGF), *AI++); 11343019c444c672938c57f5573840071ecd73425ee7John McCall 11353019c444c672938c57f5573840071ecd73425ee7John McCall // A member 'operator delete' can take an extra 'size_t' argument. 11363019c444c672938c57f5573840071ecd73425ee7John McCall if (FPT->getNumArgs() == NumPlacementArgs + 2) { 1137804b807ea918184d6de63bd745e1ff75a9bfc679John McCall RValue RV = AllocSize.restore(CGF); 113804c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RV, *AI++); 11393019c444c672938c57f5573840071ecd73425ee7John McCall } 11403019c444c672938c57f5573840071ecd73425ee7John McCall 11413019c444c672938c57f5573840071ecd73425ee7John McCall // Pass the rest of the arguments, which must match exactly. 11423019c444c672938c57f5573840071ecd73425ee7John McCall for (unsigned I = 0; I != NumPlacementArgs; ++I) { 1143804b807ea918184d6de63bd745e1ff75a9bfc679John McCall RValue RV = getPlacementArgs()[I].restore(CGF); 114404c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RV, *AI++); 11453019c444c672938c57f5573840071ecd73425ee7John McCall } 11463019c444c672938c57f5573840071ecd73425ee7John McCall 11473019c444c672938c57f5573840071ecd73425ee7John McCall // Call 'operator delete'. 1148ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith EmitNewDeleteCall(CGF, OperatorDelete, FPT, DeleteArgs); 11493019c444c672938c57f5573840071ecd73425ee7John McCall } 11503019c444c672938c57f5573840071ecd73425ee7John McCall }; 11513019c444c672938c57f5573840071ecd73425ee7John McCall} 11523019c444c672938c57f5573840071ecd73425ee7John McCall 11533019c444c672938c57f5573840071ecd73425ee7John McCall/// Enter a cleanup to call 'operator delete' if the initializer in a 11543019c444c672938c57f5573840071ecd73425ee7John McCall/// new-expression throws. 11553019c444c672938c57f5573840071ecd73425ee7John McCallstatic void EnterNewDeleteCleanup(CodeGenFunction &CGF, 11563019c444c672938c57f5573840071ecd73425ee7John McCall const CXXNewExpr *E, 11573019c444c672938c57f5573840071ecd73425ee7John McCall llvm::Value *NewPtr, 11583019c444c672938c57f5573840071ecd73425ee7John McCall llvm::Value *AllocSize, 11593019c444c672938c57f5573840071ecd73425ee7John McCall const CallArgList &NewArgs) { 11603019c444c672938c57f5573840071ecd73425ee7John McCall // If we're not inside a conditional branch, then the cleanup will 11613019c444c672938c57f5573840071ecd73425ee7John McCall // dominate and we can do the easier (and more efficient) thing. 11623019c444c672938c57f5573840071ecd73425ee7John McCall if (!CGF.isInConditionalBranch()) { 11633019c444c672938c57f5573840071ecd73425ee7John McCall CallDeleteDuringNew *Cleanup = CGF.EHStack 11643019c444c672938c57f5573840071ecd73425ee7John McCall .pushCleanupWithExtra<CallDeleteDuringNew>(EHCleanup, 11653019c444c672938c57f5573840071ecd73425ee7John McCall E->getNumPlacementArgs(), 11663019c444c672938c57f5573840071ecd73425ee7John McCall E->getOperatorDelete(), 11673019c444c672938c57f5573840071ecd73425ee7John McCall NewPtr, AllocSize); 11683019c444c672938c57f5573840071ecd73425ee7John McCall for (unsigned I = 0, N = E->getNumPlacementArgs(); I != N; ++I) 1169c6d07821c529bb95e4cf072e49b736c5142f1786Eli Friedman Cleanup->setPlacementArg(I, NewArgs[I+1].RV); 11703019c444c672938c57f5573840071ecd73425ee7John McCall 11713019c444c672938c57f5573840071ecd73425ee7John McCall return; 11723019c444c672938c57f5573840071ecd73425ee7John McCall } 11733019c444c672938c57f5573840071ecd73425ee7John McCall 11743019c444c672938c57f5573840071ecd73425ee7John McCall // Otherwise, we need to save all this stuff. 1175804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type SavedNewPtr = 1176804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::save(CGF, RValue::get(NewPtr)); 1177804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type SavedAllocSize = 1178804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::save(CGF, RValue::get(AllocSize)); 11793019c444c672938c57f5573840071ecd73425ee7John McCall 11803019c444c672938c57f5573840071ecd73425ee7John McCall CallDeleteDuringConditionalNew *Cleanup = CGF.EHStack 11816f103ba42cb69d50005a977c5ea583984ab63fc4John McCall .pushCleanupWithExtra<CallDeleteDuringConditionalNew>(EHCleanup, 11823019c444c672938c57f5573840071ecd73425ee7John McCall E->getNumPlacementArgs(), 11833019c444c672938c57f5573840071ecd73425ee7John McCall E->getOperatorDelete(), 11843019c444c672938c57f5573840071ecd73425ee7John McCall SavedNewPtr, 11853019c444c672938c57f5573840071ecd73425ee7John McCall SavedAllocSize); 11863019c444c672938c57f5573840071ecd73425ee7John McCall for (unsigned I = 0, N = E->getNumPlacementArgs(); I != N; ++I) 1187804b807ea918184d6de63bd745e1ff75a9bfc679John McCall Cleanup->setPlacementArg(I, 1188c6d07821c529bb95e4cf072e49b736c5142f1786Eli Friedman DominatingValue<RValue>::save(CGF, NewArgs[I+1].RV)); 11893019c444c672938c57f5573840071ecd73425ee7John McCall 11906f103ba42cb69d50005a977c5ea583984ab63fc4John McCall CGF.initFullExprCleanup(); 11917d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall} 11927d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 119316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlssonllvm::Value *CodeGenFunction::EmitCXXNewExpr(const CXXNewExpr *E) { 1194c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // The element type being allocated. 1195c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall QualType allocType = getContext().getBaseElementType(E->getAllocatedType()); 11961e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1197c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // 1. Build a call to the allocation function. 1198c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall FunctionDecl *allocator = E->getOperatorNew(); 1199c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall const FunctionProtoType *allocatorType = 1200c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall allocator->getType()->castAs<FunctionProtoType>(); 120116d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1202c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall CallArgList allocatorArgs; 120316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 120416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // The allocation size is the first argument. 1205c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall QualType sizeType = getContext().getSizeType(); 120616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 12079203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // If there is a brace-initializer, cannot allocate fewer elements than inits. 12089203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl unsigned minElements = 0; 12099203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (E->isArray() && E->hasInitializer()) { 12109203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (const InitListExpr *ILE = dyn_cast<InitListExpr>(E->getInitializer())) 12119203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl minElements = ILE->getNumInits(); 12129203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } 12139203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 1214c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::Value *numElements = 0; 1215c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::Value *allocSizeWithoutCookie = 0; 1216c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::Value *allocSize = 12179203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl EmitCXXNewAllocSize(*this, E, minElements, numElements, 12189203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl allocSizeWithoutCookie); 1219a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 122004c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman allocatorArgs.add(RValue::get(allocSize), sizeType); 122116d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 122216d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // Emit the rest of the arguments. 122316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // FIXME: Ideally, this should just use EmitCallArgs. 1224c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall CXXNewExpr::const_arg_iterator placementArg = E->placement_arg_begin(); 122516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 122616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // First, use the types from the function type. 122716d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // We start at 1 here because the first argument (the allocation size) 122816d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // has already been emitted. 1229c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall for (unsigned i = 1, e = allocatorType->getNumArgs(); i != e; 1230c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall ++i, ++placementArg) { 1231c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall QualType argType = allocatorType->getArgType(i); 123216d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1233c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall assert(getContext().hasSameUnqualifiedType(argType.getNonReferenceType(), 1234c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall placementArg->getType()) && 123516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson "type mismatch in call argument!"); 123616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1237413ebdb1af6fb0d81845b61254daf02ba0449afdJohn McCall EmitCallArg(allocatorArgs, *placementArg, argType); 123816d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson } 123916d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 124016d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // Either we've emitted all the call args, or we have a call to a 124116d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // variadic function. 1242c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall assert((placementArg == E->placement_arg_end() || 1243c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall allocatorType->isVariadic()) && 1244c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall "Extra arguments to non-variadic function!"); 124516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 124616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // If we still have any arguments, emit them using the type of the argument. 1247c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall for (CXXNewExpr::const_arg_iterator placementArgsEnd = E->placement_arg_end(); 1248c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall placementArg != placementArgsEnd; ++placementArg) { 1249413ebdb1af6fb0d81845b61254daf02ba0449afdJohn McCall EmitCallArg(allocatorArgs, *placementArg, placementArg->getType()); 125016d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson } 125116d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1252b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // Emit the allocation call. If the allocator is a global placement 1253b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // operator, just "inline" it directly. 1254b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall RValue RV; 1255b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall if (allocator->isReservedGlobalPlacementOperator()) { 1256b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall assert(allocatorArgs.size() == 2); 1257b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall RV = allocatorArgs[1].RV; 1258b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // TODO: kill any unnecessary computations done for the size 1259b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // argument. 1260b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall } else { 1261ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith RV = EmitNewDeleteCall(*this, allocator, allocatorType, allocatorArgs); 1262b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall } 126316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1264c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // Emit a null check on the allocation result if the allocation 1265c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // function is allowed to return null (because it has a non-throwing 1266c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // exception spec; for this part, we inline 1267c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // CXXNewExpr::shouldNullCheckAllocation()) and we have an 1268c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // interesting initializer. 12698026f6d82f7fa544bc0453714fe94bca62a1196eSebastian Redl bool nullCheck = allocatorType->isNothrow(getContext()) && 12702aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl (!allocType.isPODType(getContext()) || E->hasInitializer()); 127116d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1272c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::BasicBlock *nullCheckBB = 0; 1273c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::BasicBlock *contBB = 0; 127416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1275c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::Value *allocation = RV.getScalarVal(); 1276956a5a17713deb1b5b27893303c4f308a1bd2a62Micah Villmow unsigned AS = allocation->getType()->getPointerAddressSpace(); 127716d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1278a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall // The null-check means that the initializer is conditionally 1279a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall // evaluated. 1280a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall ConditionalEvaluation conditional(*this); 1281a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall 1282c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall if (nullCheck) { 1283c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall conditional.begin(*this); 128416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1285c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall nullCheckBB = Builder.GetInsertBlock(); 1286c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::BasicBlock *notNullBB = createBasicBlock("new.notnull"); 1287c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall contBB = createBasicBlock("new.cont"); 1288a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall 1289c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::Value *isNull = Builder.CreateIsNull(allocation, "new.isnull"); 1290c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall Builder.CreateCondBr(isNull, contBB, notNullBB); 1291c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall EmitBlock(notNullBB); 129216d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson } 12931e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 12947d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // If there's an operator delete, enter a cleanup to call it if an 12957d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // exception is thrown. 1296c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall EHScopeStack::stable_iterator operatorDeleteCleanup; 12976f103ba42cb69d50005a977c5ea583984ab63fc4John McCall llvm::Instruction *cleanupDominator = 0; 1298b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall if (E->getOperatorDelete() && 1299b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall !E->getOperatorDelete()->isReservedGlobalPlacementOperator()) { 1300c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall EnterNewDeleteCleanup(*this, E, allocation, allocSize, allocatorArgs); 1301c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall operatorDeleteCleanup = EHStack.stable_begin(); 13026f103ba42cb69d50005a977c5ea583984ab63fc4John McCall cleanupDominator = Builder.CreateUnreachable(); 13037d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall } 13047d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 1305576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman assert((allocSize == allocSizeWithoutCookie) == 1306576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman CalculateCookiePadding(*this, E).isZero()); 1307576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman if (allocSize != allocSizeWithoutCookie) { 1308576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman assert(E->isArray()); 1309576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman allocation = CGM.getCXXABI().InitializeArrayCookie(*this, allocation, 1310576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman numElements, 1311576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman E, allocType); 1312576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman } 1313576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman 13142acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *elementPtrTy 1315c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall = ConvertTypeForMem(allocType)->getPointerTo(AS); 1316c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::Value *result = Builder.CreateBitCast(allocation, elementPtrTy); 13177d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 1318197056726ed6412501130c2ef2ff69009772aa65John McCall EmitNewInitializer(*this, E, allocType, result, numElements, 1319197056726ed6412501130c2ef2ff69009772aa65John McCall allocSizeWithoutCookie); 13201e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (E->isArray()) { 13211e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // NewPtr is a pointer to the base element type. If we're 13221e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // allocating an array of arrays, we'll need to cast back to the 13231e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // array pointer type. 13242acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *resultType = ConvertTypeForMem(E->getType()); 1325c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall if (result->getType() != resultType) 1326c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall result = Builder.CreateBitCast(result, resultType); 1327ceb43b662bf09b44a08714e8f9d222780ca979d7Fariborz Jahanian } 13287d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 13297d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // Deactivate the 'operator delete' cleanup if we finished 13307d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // initialization. 13316f103ba42cb69d50005a977c5ea583984ab63fc4John McCall if (operatorDeleteCleanup.isValid()) { 13326f103ba42cb69d50005a977c5ea583984ab63fc4John McCall DeactivateCleanupBlock(operatorDeleteCleanup, cleanupDominator); 13336f103ba42cb69d50005a977c5ea583984ab63fc4John McCall cleanupDominator->eraseFromParent(); 13346f103ba42cb69d50005a977c5ea583984ab63fc4John McCall } 13352aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl 1336c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall if (nullCheck) { 1337a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall conditional.end(*this); 1338a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall 1339c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::BasicBlock *notNullBB = Builder.GetInsertBlock(); 1340c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall EmitBlock(contBB); 134116d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1342bbf3bacb3e0c1ebb3e8a4a8b1330404a7e379315Jay Foad llvm::PHINode *PHI = Builder.CreatePHI(result->getType(), 2); 1343c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall PHI->addIncoming(result, notNullBB); 1344c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall PHI->addIncoming(llvm::Constant::getNullValue(result->getType()), 1345c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall nullCheckBB); 134616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1347c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall result = PHI; 134816d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson } 13491e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1350c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall return result; 135116d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson} 135216d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 13535fe05986473c4ff780508dec4cd2cf4822168125Eli Friedmanvoid CodeGenFunction::EmitDeleteCall(const FunctionDecl *DeleteFD, 13545fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman llvm::Value *Ptr, 13555fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman QualType DeleteTy) { 13561e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall assert(DeleteFD->getOverloadedOperator() == OO_Delete); 13571e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 13585fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman const FunctionProtoType *DeleteFTy = 13595fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman DeleteFD->getType()->getAs<FunctionProtoType>(); 13605fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman 13615fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman CallArgList DeleteArgs; 13625fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman 1363871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson // Check if we need to pass the size to the delete operator. 1364871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson llvm::Value *Size = 0; 1365871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson QualType SizeTy; 13665fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman if (DeleteFTy->getNumArgs() == 2) { 1367871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson SizeTy = DeleteFTy->getArgType(1); 13684f122ef0ca7683486d78c84ed87455d5f35ee1b1Ken Dyck CharUnits DeleteTypeSize = getContext().getTypeSizeInChars(DeleteTy); 13694f122ef0ca7683486d78c84ed87455d5f35ee1b1Ken Dyck Size = llvm::ConstantInt::get(ConvertType(SizeTy), 13704f122ef0ca7683486d78c84ed87455d5f35ee1b1Ken Dyck DeleteTypeSize.getQuantity()); 1371871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson } 1372871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson 1373871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson QualType ArgTy = DeleteFTy->getArgType(0); 1374871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson llvm::Value *DeletePtr = Builder.CreateBitCast(Ptr, ConvertType(ArgTy)); 137504c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RValue::get(DeletePtr), ArgTy); 1376871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson 1377871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson if (Size) 137804c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RValue::get(Size), SizeTy); 13795fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman 13805fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman // Emit the call to delete. 1381ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith EmitNewDeleteCall(*this, DeleteFD, DeleteFTy, DeleteArgs); 13825fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman} 13835fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman 13841e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCallnamespace { 13851e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall /// Calls the given 'operator delete' on a single object. 13861e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall struct CallObjectDelete : EHScopeStack::Cleanup { 13871e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *Ptr; 13881e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionDecl *OperatorDelete; 13891e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType ElementType; 13901e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 13911e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CallObjectDelete(llvm::Value *Ptr, 13921e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionDecl *OperatorDelete, 13931e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType ElementType) 13941e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall : Ptr(Ptr), OperatorDelete(OperatorDelete), ElementType(ElementType) {} 13951e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1396ad346f4f678ab1c3222425641d851dc63e9dfa1aJohn McCall void Emit(CodeGenFunction &CGF, Flags flags) { 13971e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.EmitDeleteCall(OperatorDelete, Ptr, ElementType); 13981e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 13991e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall }; 14001e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall} 14011e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14021e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall/// Emit the code for deleting a single object. 14031e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCallstatic void EmitObjectDelete(CodeGenFunction &CGF, 14041e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionDecl *OperatorDelete, 14051e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *Ptr, 1406a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor QualType ElementType, 1407a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor bool UseGlobalDelete) { 14081e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Find the destructor for the type, if applicable. If the 14091e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // destructor is virtual, we'll just emit the vcall and return. 14101e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const CXXDestructorDecl *Dtor = 0; 14111e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (const RecordType *RT = ElementType->getAs<RecordType>()) { 14121e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 1413aebab72698ce5283395e61597a266fb04e62e390Eli Friedman if (RD->hasDefinition() && !RD->hasTrivialDestructor()) { 14141e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall Dtor = RD->getDestructor(); 14151e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14161e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (Dtor->isVirtual()) { 1417a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor if (UseGlobalDelete) { 1418a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor // If we're supposed to call the global delete, make sure we do so 1419a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor // even if the destructor throws. 1420ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall 1421ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall // Derive the complete-object pointer, which is what we need 1422ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall // to pass to the deallocation function. 1423ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall llvm::Value *completePtr = 1424ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall CGF.CGM.getCXXABI().adjustToCompleteObject(CGF, Ptr, ElementType); 1425ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall 1426a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor CGF.EHStack.pushCleanup<CallObjectDelete>(NormalAndEHCleanup, 1427ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall completePtr, OperatorDelete, 1428a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor ElementType); 1429a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor } 14300f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov 14314def70d3040e73707c738f7c366737a986135edfRichard Smith // FIXME: Provide a source location here. 14320f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov CXXDtorType DtorType = UseGlobalDelete ? Dtor_Complete : Dtor_Deleting; 14330f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov CGF.CGM.getCXXABI().EmitVirtualDestructorCall(CGF, Dtor, DtorType, 14343b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin SourceLocation(), Ptr); 14351e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1436a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor if (UseGlobalDelete) { 1437a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor CGF.PopCleanupBlock(); 1438a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor } 1439a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor 14401e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall return; 14411e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 14421e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 14431e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 14441e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14451e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Make sure that we call delete even if the dtor throws. 14463ad32c8d93eb65d1d4943d7df567fc9b4f55d137John McCall // This doesn't have to a conditional cleanup because we're going 14473ad32c8d93eb65d1d4943d7df567fc9b4f55d137John McCall // to pop it off in a second. 14481e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.EHStack.pushCleanup<CallObjectDelete>(NormalAndEHCleanup, 14491e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall Ptr, OperatorDelete, ElementType); 14501e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14511e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (Dtor) 14521e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.EmitCXXDestructorCall(Dtor, Dtor_Complete, 1453378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor /*ForVirtualBase=*/false, 1454378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor /*Delegating=*/false, 1455378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor Ptr); 14564e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie else if (CGF.getLangOpts().ObjCAutoRefCount && 1457f85e193739c953358c865005855253af4f68a497John McCall ElementType->isObjCLifetimeType()) { 1458f85e193739c953358c865005855253af4f68a497John McCall switch (ElementType.getObjCLifetime()) { 1459f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_None: 1460f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_ExplicitNone: 1461f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_Autoreleasing: 1462f85e193739c953358c865005855253af4f68a497John McCall break; 14631e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1464f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_Strong: { 1465f85e193739c953358c865005855253af4f68a497John McCall // Load the pointer value. 1466f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *PtrValue = CGF.Builder.CreateLoad(Ptr, 1467f85e193739c953358c865005855253af4f68a497John McCall ElementType.isVolatileQualified()); 1468f85e193739c953358c865005855253af4f68a497John McCall 14695b07e8077a20b80fee90bd76c43c6150c676e4a8John McCall CGF.EmitARCRelease(PtrValue, ARCPreciseLifetime); 1470f85e193739c953358c865005855253af4f68a497John McCall break; 1471f85e193739c953358c865005855253af4f68a497John McCall } 1472f85e193739c953358c865005855253af4f68a497John McCall 1473f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_Weak: 1474f85e193739c953358c865005855253af4f68a497John McCall CGF.EmitARCDestroyWeak(Ptr); 1475f85e193739c953358c865005855253af4f68a497John McCall break; 1476f85e193739c953358c865005855253af4f68a497John McCall } 1477f85e193739c953358c865005855253af4f68a497John McCall } 1478f85e193739c953358c865005855253af4f68a497John McCall 14791e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.PopCleanupBlock(); 14801e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall} 14811e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14821e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCallnamespace { 14831e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall /// Calls the given 'operator delete' on an array of objects. 14841e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall struct CallArrayDelete : EHScopeStack::Cleanup { 14851e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *Ptr; 14861e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionDecl *OperatorDelete; 14871e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *NumElements; 14881e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType ElementType; 14891e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CharUnits CookieSize; 14901e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14911e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CallArrayDelete(llvm::Value *Ptr, 14921e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionDecl *OperatorDelete, 14931e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *NumElements, 14941e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType ElementType, 14951e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CharUnits CookieSize) 14961e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall : Ptr(Ptr), OperatorDelete(OperatorDelete), NumElements(NumElements), 14971e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall ElementType(ElementType), CookieSize(CookieSize) {} 14981e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1499ad346f4f678ab1c3222425641d851dc63e9dfa1aJohn McCall void Emit(CodeGenFunction &CGF, Flags flags) { 15001e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionProtoType *DeleteFTy = 15011e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall OperatorDelete->getType()->getAs<FunctionProtoType>(); 15021e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall assert(DeleteFTy->getNumArgs() == 1 || DeleteFTy->getNumArgs() == 2); 15031e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15041e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CallArgList Args; 15051e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15061e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Pass the pointer as the first argument. 15071e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType VoidPtrTy = DeleteFTy->getArgType(0); 15081e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *DeletePtr 15091e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall = CGF.Builder.CreateBitCast(Ptr, CGF.ConvertType(VoidPtrTy)); 151004c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman Args.add(RValue::get(DeletePtr), VoidPtrTy); 15111e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15121e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Pass the original requested size as the second argument. 15131e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (DeleteFTy->getNumArgs() == 2) { 15141e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType size_t = DeleteFTy->getArgType(1); 15152acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::IntegerType *SizeTy 15161e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall = cast<llvm::IntegerType>(CGF.ConvertType(size_t)); 15171e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15181e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CharUnits ElementTypeSize = 15191e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.CGM.getContext().getTypeSizeInChars(ElementType); 15201e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15211e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // The size of an element, multiplied by the number of elements. 15221e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *Size 15231e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall = llvm::ConstantInt::get(SizeTy, ElementTypeSize.getQuantity()); 15241e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall Size = CGF.Builder.CreateMul(Size, NumElements); 15251e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15261e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Plus the size of the cookie if applicable. 15271e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (!CookieSize.isZero()) { 15281e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *CookieSizeV 15291e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall = llvm::ConstantInt::get(SizeTy, CookieSize.getQuantity()); 15301e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall Size = CGF.Builder.CreateAdd(Size, CookieSizeV); 15311e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 15321e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 153304c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman Args.add(RValue::get(Size), size_t); 15341e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 15351e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15361e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Emit the call to delete. 1537ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith EmitNewDeleteCall(CGF, OperatorDelete, DeleteFTy, Args); 15381e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 15391e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall }; 15401e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall} 15411e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15421e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall/// Emit the code for deleting an array of objects. 15431e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCallstatic void EmitArrayDelete(CodeGenFunction &CGF, 15446ec278d1a354517e20f13a877481453ee7940c78John McCall const CXXDeleteExpr *E, 15457cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall llvm::Value *deletedPtr, 15467cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall QualType elementType) { 15477cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall llvm::Value *numElements = 0; 15487cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall llvm::Value *allocatedPtr = 0; 15497cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CharUnits cookieSize; 15507cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CGF.CGM.getCXXABI().ReadArrayCookie(CGF, deletedPtr, E, elementType, 15517cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall numElements, allocatedPtr, cookieSize); 15521e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15537cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall assert(allocatedPtr && "ReadArrayCookie didn't set allocated pointer"); 15541e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15551e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Make sure that we call delete even if one of the dtors throws. 15567cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall const FunctionDecl *operatorDelete = E->getOperatorDelete(); 15571e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.EHStack.pushCleanup<CallArrayDelete>(NormalAndEHCleanup, 15587cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall allocatedPtr, operatorDelete, 15597cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall numElements, elementType, 15607cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall cookieSize); 15617cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall 15627cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall // Destroy the elements. 15637cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall if (QualType::DestructionKind dtorKind = elementType.isDestructedType()) { 15647cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall assert(numElements && "no element count for a type with a destructor!"); 15657cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall 15667cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall llvm::Value *arrayEnd = 15677cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CGF.Builder.CreateInBoundsGEP(deletedPtr, numElements, "delete.end"); 1568fbf780a9d1dbb191fc40c8af967c590e08724b74John McCall 1569fbf780a9d1dbb191fc40c8af967c590e08724b74John McCall // Note that it is legal to allocate a zero-length array, and we 1570fbf780a9d1dbb191fc40c8af967c590e08724b74John McCall // can never fold the check away because the length should always 1571fbf780a9d1dbb191fc40c8af967c590e08724b74John McCall // come from a cookie. 15727cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CGF.emitArrayDestroy(deletedPtr, arrayEnd, elementType, 15737cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CGF.getDestroyer(dtorKind), 1574fbf780a9d1dbb191fc40c8af967c590e08724b74John McCall /*checkZeroLength*/ true, 15757cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CGF.needsEHCleanup(dtorKind)); 15761e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 15771e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15787cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall // Pop the cleanup block. 15791e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.PopCleanupBlock(); 15801e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall} 15811e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 158216d81b8db39593b5f1a38b077757272a09c12da8Anders Carlssonvoid CodeGenFunction::EmitCXXDeleteExpr(const CXXDeleteExpr *E) { 15839091656e423f2354e53b2b3baa95b3eb5510badcDouglas Gregor const Expr *Arg = E->getArgument(); 15849091656e423f2354e53b2b3baa95b3eb5510badcDouglas Gregor llvm::Value *Ptr = EmitScalarExpr(Arg); 158516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 158616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // Null check the pointer. 158716d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson llvm::BasicBlock *DeleteNotNull = createBasicBlock("delete.notnull"); 158816d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson llvm::BasicBlock *DeleteEnd = createBasicBlock("delete.end"); 158916d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1590b924124316becf2968a37dab36d0c48ea167666fAnders Carlsson llvm::Value *IsNull = Builder.CreateIsNull(Ptr, "isnull"); 159116d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 159216d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson Builder.CreateCondBr(IsNull, DeleteEnd, DeleteNotNull); 159316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson EmitBlock(DeleteNotNull); 15941e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15951e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // We might be deleting a pointer to array. If so, GEP down to the 15961e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // first non-array element. 15971e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // (this assumes that A(*)[3][7] is converted to [3 x [7 x %A]]*) 15981e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType DeleteTy = Arg->getType()->getAs<PointerType>()->getPointeeType(); 15991e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (DeleteTy->isConstantArrayType()) { 16001e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *Zero = Builder.getInt32(0); 16015f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Value*,8> GEP; 16021e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 16031e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall GEP.push_back(Zero); // point at the outermost array 16041e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 16051e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // For each layer of array type we're pointing at: 16061e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall while (const ConstantArrayType *Arr 16071e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall = getContext().getAsConstantArrayType(DeleteTy)) { 16081e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // 1. Unpeel the array type. 16091e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall DeleteTy = Arr->getElementType(); 16101e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 16111e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // 2. GEP to the first element of the array. 16121e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall GEP.push_back(Zero); 161316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson } 16141e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 16150f6ac7cf7bc6a02c1a5c19d2c90ec0d1dd7786e7Jay Foad Ptr = Builder.CreateInBoundsGEP(Ptr, GEP, "del.first"); 161616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson } 161716d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1618eede61a83e90f3cb03ef8665b67d648dccd6ce42Douglas Gregor assert(ConvertTypeForMem(DeleteTy) == 1619eede61a83e90f3cb03ef8665b67d648dccd6ce42Douglas Gregor cast<llvm::PointerType>(Ptr->getType())->getElementType()); 16201e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 16211e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (E->isArrayForm()) { 16226ec278d1a354517e20f13a877481453ee7940c78John McCall EmitArrayDelete(*this, E, Ptr, DeleteTy); 16231e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } else { 1624a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor EmitObjectDelete(*this, E->getOperatorDelete(), Ptr, DeleteTy, 1625a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor E->isGlobalDelete()); 16261e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 162716d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 162816d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson EmitBlock(DeleteEnd); 162916d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson} 1630c2e84ae9a6d25cea3e583c768e576b4c981ec028Mike Stump 16314bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlssonstatic llvm::Constant *getBadTypeidFn(CodeGenFunction &CGF) { 16324bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson // void __cxa_bad_typeid(); 16338b418685e9e4f02f4eb2a76e1ec063e07552b68dChris Lattner llvm::FunctionType *FTy = llvm::FunctionType::get(CGF.VoidTy, false); 16344bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson 16354bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson return CGF.CGM.CreateRuntimeFunction(FTy, "__cxa_bad_typeid"); 16364bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson} 16374bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson 16384bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlssonstatic void EmitBadTypeidCall(CodeGenFunction &CGF) { 1639ad3692bbe1874abafae1757a2b9d3bfa2249dc43Anders Carlsson llvm::Value *Fn = getBadTypeidFn(CGF); 1640bd7370a78604e9a20d698bfe328c1e43f12a0613John McCall CGF.EmitRuntimeCallOrInvoke(Fn).setDoesNotReturn(); 16414bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson CGF.Builder.CreateUnreachable(); 16424bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson} 16434bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson 16443f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlssonstatic llvm::Value *EmitTypeidFromVTable(CodeGenFunction &CGF, 16453f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson const Expr *E, 16462acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *StdTypeInfoPtrTy) { 16473f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // Get the vtable pointer. 16483f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson llvm::Value *ThisPtr = CGF.EmitLValue(E).getAddress(); 16493f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16503f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // C++ [expr.typeid]p2: 16513f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // If the glvalue expression is obtained by applying the unary * operator to 16523f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // a pointer and the pointer is a null pointer value, the typeid expression 16533f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // throws the std::bad_typeid exception. 16543f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E->IgnoreParens())) { 16553f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson if (UO->getOpcode() == UO_Deref) { 16563f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson llvm::BasicBlock *BadTypeidBlock = 16573f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson CGF.createBasicBlock("typeid.bad_typeid"); 16583f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson llvm::BasicBlock *EndBlock = 16593f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson CGF.createBasicBlock("typeid.end"); 16603f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16613f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson llvm::Value *IsNull = CGF.Builder.CreateIsNull(ThisPtr); 16623f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson CGF.Builder.CreateCondBr(IsNull, BadTypeidBlock, EndBlock); 16633f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16643f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson CGF.EmitBlock(BadTypeidBlock); 16653f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson EmitBadTypeidCall(CGF); 16663f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson CGF.EmitBlock(EndBlock); 16673f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson } 16683f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson } 16693f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16703f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson llvm::Value *Value = CGF.GetVTablePtr(ThisPtr, 16713f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson StdTypeInfoPtrTy->getPointerTo()); 16723f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16733f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // Load the type info. 16743f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson Value = CGF.Builder.CreateConstInBoundsGEP1_64(Value, -1ULL); 16753f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson return CGF.Builder.CreateLoad(Value); 16763f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson} 16773f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16783ad32c8d93eb65d1d4943d7df567fc9b4f55d137John McCallllvm::Value *CodeGenFunction::EmitCXXTypeidExpr(const CXXTypeidExpr *E) { 16792acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *StdTypeInfoPtrTy = 16803f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson ConvertType(E->getType())->getPointerTo(); 168131b7f52d8c8d459e80d2a72176cc7fcc4b7d8d38Anders Carlsson 16821d7088d1d9dc99e5478c0184a3e21cafef2a0b53Anders Carlsson if (E->isTypeOperand()) { 16831d7088d1d9dc99e5478c0184a3e21cafef2a0b53Anders Carlsson llvm::Constant *TypeInfo = 16841d7088d1d9dc99e5478c0184a3e21cafef2a0b53Anders Carlsson CGM.GetAddrOfRTTIDescriptor(E->getTypeOperand()); 16853f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson return Builder.CreateBitCast(TypeInfo, StdTypeInfoPtrTy); 16861d7088d1d9dc99e5478c0184a3e21cafef2a0b53Anders Carlsson } 16874bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson 16883f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // C++ [expr.typeid]p2: 16893f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // When typeid is applied to a glvalue expression whose type is a 16903f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // polymorphic class type, the result refers to a std::type_info object 16913f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // representing the type of the most derived object (that is, the dynamic 16923f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // type) to which the glvalue refers. 16930d729105ecb50a7e3cbe6e57c29149edfa5cf05aRichard Smith if (E->isPotentiallyEvaluated()) 16940d729105ecb50a7e3cbe6e57c29149edfa5cf05aRichard Smith return EmitTypeidFromVTable(*this, E->getExprOperand(), 16950d729105ecb50a7e3cbe6e57c29149edfa5cf05aRichard Smith StdTypeInfoPtrTy); 16963f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16973f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson QualType OperandTy = E->getExprOperand()->getType(); 16983f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson return Builder.CreateBitCast(CGM.GetAddrOfRTTIDescriptor(OperandTy), 16993f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson StdTypeInfoPtrTy); 1700c2e84ae9a6d25cea3e583c768e576b4c981ec028Mike Stump} 1701c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 1702f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlssonstatic llvm::Constant *getDynamicCastFn(CodeGenFunction &CGF) { 1703f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // void *__dynamic_cast(const void *sub, 1704f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // const abi::__class_type_info *src, 1705f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // const abi::__class_type_info *dst, 1706f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // std::ptrdiff_t src2dst_offset); 1707f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 17088b418685e9e4f02f4eb2a76e1ec063e07552b68dChris Lattner llvm::Type *Int8PtrTy = CGF.Int8PtrTy; 17099cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *PtrDiffTy = 1710f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CGF.ConvertType(CGF.getContext().getPointerDiffType()); 1711f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 17129cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *Args[4] = { Int8PtrTy, Int8PtrTy, Int8PtrTy, PtrDiffTy }; 171321f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer 171421f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer llvm::FunctionType *FTy = llvm::FunctionType::get(Int8PtrTy, Args, false); 171521f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer 171621f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer // Mark the function as nounwind readonly. 171721f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer llvm::Attribute::AttrKind FuncAttrs[] = { llvm::Attribute::NoUnwind, 171821f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer llvm::Attribute::ReadOnly }; 171921f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer llvm::AttributeSet Attrs = llvm::AttributeSet::get( 172021f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer CGF.getLLVMContext(), llvm::AttributeSet::FunctionIndex, FuncAttrs); 172121f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer 172221f6b39cca88f0a027c6f5cde24575165c2d5e40Benjamin Kramer return CGF.CGM.CreateRuntimeFunction(FTy, "__dynamic_cast", Attrs); 1723f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson} 1724f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1725f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlssonstatic llvm::Constant *getBadCastFn(CodeGenFunction &CGF) { 1726f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // void __cxa_bad_cast(); 17278b418685e9e4f02f4eb2a76e1ec063e07552b68dChris Lattner llvm::FunctionType *FTy = llvm::FunctionType::get(CGF.VoidTy, false); 1728f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson return CGF.CGM.CreateRuntimeFunction(FTy, "__cxa_bad_cast"); 1729f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson} 1730f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 17313ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlssonstatic void EmitBadCastCall(CodeGenFunction &CGF) { 1732ad3692bbe1874abafae1757a2b9d3bfa2249dc43Anders Carlsson llvm::Value *Fn = getBadCastFn(CGF); 1733bd7370a78604e9a20d698bfe328c1e43f12a0613John McCall CGF.EmitRuntimeCallOrInvoke(Fn).setDoesNotReturn(); 17343ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson CGF.Builder.CreateUnreachable(); 17353ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson} 17363ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 1737ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer/// \brief Compute the src2dst_offset hint as described in the 1738ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer/// Itanium C++ ABI [2.9.7] 1739ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramerstatic CharUnits computeOffsetHint(ASTContext &Context, 1740ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer const CXXRecordDecl *Src, 1741ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer const CXXRecordDecl *Dst) { 1742ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true, 1743ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer /*DetectVirtual=*/false); 1744ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1745ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // If Dst is not derived from Src we can skip the whole computation below and 1746ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // return that Src is not a public base of Dst. Record all inheritance paths. 1747ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer if (!Dst->isDerivedFrom(Src, Paths)) 1748ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer return CharUnits::fromQuantity(-2ULL); 1749ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1750ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer unsigned NumPublicPaths = 0; 1751ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer CharUnits Offset; 1752ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1753ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // Now walk all possible inheritance paths. 1754ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer for (CXXBasePaths::paths_iterator I = Paths.begin(), E = Paths.end(); 1755ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer I != E; ++I) { 1756ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer if (I->Access != AS_public) // Ignore non-public inheritance. 1757ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer continue; 1758ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1759ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer ++NumPublicPaths; 1760ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1761ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer for (CXXBasePath::iterator J = I->begin(), JE = I->end(); J != JE; ++J) { 1762ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // If the path contains a virtual base class we can't give any hint. 1763ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // -1: no hint. 1764ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer if (J->Base->isVirtual()) 1765ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer return CharUnits::fromQuantity(-1ULL); 1766ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1767ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer if (NumPublicPaths > 1) // Won't use offsets, skip computation. 1768ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer continue; 1769ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1770ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // Accumulate the base class offsets. 1771ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer const ASTRecordLayout &L = Context.getASTRecordLayout(J->Class); 1772ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer Offset += L.getBaseClassOffset(J->Base->getType()->getAsCXXRecordDecl()); 1773ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer } 1774ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer } 1775ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1776ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // -2: Src is not a public base of Dst. 1777ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer if (NumPublicPaths == 0) 1778ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer return CharUnits::fromQuantity(-2ULL); 1779ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1780ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // -3: Src is a multiple public base type but never a virtual base type. 1781ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer if (NumPublicPaths > 1) 1782ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer return CharUnits::fromQuantity(-3ULL); 1783ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1784ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // Otherwise, the Src type is a unique public nonvirtual base type of Dst. 1785ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // Return the offset of Src from the origin of Dst. 1786ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer return Offset; 1787ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer} 1788ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer 1789f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlssonstatic llvm::Value * 1790f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders CarlssonEmitDynamicCastCall(CodeGenFunction &CGF, llvm::Value *Value, 1791f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson QualType SrcTy, QualType DestTy, 1792f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::BasicBlock *CastEnd) { 17932acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *PtrDiffLTy = 1794f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CGF.ConvertType(CGF.getContext().getPointerDiffType()); 17952acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *DestLTy = CGF.ConvertType(DestTy); 1796f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1797f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (const PointerType *PTy = DestTy->getAs<PointerType>()) { 1798f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (PTy->getPointeeType()->isVoidType()) { 1799f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // C++ [expr.dynamic.cast]p7: 1800f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // If T is "pointer to cv void," then the result is a pointer to the 1801f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // most derived object pointed to by v. 1802f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1803f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // Get the vtable pointer. 1804f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::Value *VTable = CGF.GetVTablePtr(Value, PtrDiffLTy->getPointerTo()); 1805f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1806f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // Get the offset-to-top from the vtable. 1807f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::Value *OffsetToTop = 1808f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CGF.Builder.CreateConstInBoundsGEP1_64(VTable, -2ULL); 1809f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson OffsetToTop = CGF.Builder.CreateLoad(OffsetToTop, "offset.to.top"); 1810f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1811f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // Finally, add the offset to the pointer. 1812f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson Value = CGF.EmitCastToVoidPtr(Value); 1813f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson Value = CGF.Builder.CreateInBoundsGEP(Value, OffsetToTop); 1814f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1815f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson return CGF.Builder.CreateBitCast(Value, DestLTy); 1816f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson } 1817f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson } 1818f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1819f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson QualType SrcRecordTy; 1820f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson QualType DestRecordTy; 1821f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1822f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (const PointerType *DestPTy = DestTy->getAs<PointerType>()) { 1823f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson SrcRecordTy = SrcTy->castAs<PointerType>()->getPointeeType(); 1824f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson DestRecordTy = DestPTy->getPointeeType(); 1825c849c052d6b4b70f2651c1969531861a5f230053Mike Stump } else { 1826f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson SrcRecordTy = SrcTy; 1827f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson DestRecordTy = DestTy->castAs<ReferenceType>()->getPointeeType(); 1828c849c052d6b4b70f2651c1969531861a5f230053Mike Stump } 1829c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 1830f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson assert(SrcRecordTy->isRecordType() && "source type must be a record type!"); 1831f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson assert(DestRecordTy->isRecordType() && "dest type must be a record type!"); 1832f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1833f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::Value *SrcRTTI = 1834f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CGF.CGM.GetAddrOfRTTIDescriptor(SrcRecordTy.getUnqualifiedType()); 1835f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::Value *DestRTTI = 1836f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CGF.CGM.GetAddrOfRTTIDescriptor(DestRecordTy.getUnqualifiedType()); 1837f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1838ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer // Compute the offset hint. 1839ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer const CXXRecordDecl *SrcDecl = SrcRecordTy->getAsCXXRecordDecl(); 1840ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer const CXXRecordDecl *DestDecl = DestRecordTy->getAsCXXRecordDecl(); 1841ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer llvm::Value *OffsetHint = 1842ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer llvm::ConstantInt::get(PtrDiffLTy, 1843ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer computeOffsetHint(CGF.getContext(), SrcDecl, 1844ae3f7608756eb90d8dd5d014238437fcbf1c7de7Benjamin Kramer DestDecl).getQuantity()); 1845f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1846f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // Emit the call to __dynamic_cast. 1847f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson Value = CGF.EmitCastToVoidPtr(Value); 1848bd7370a78604e9a20d698bfe328c1e43f12a0613John McCall 1849bd7370a78604e9a20d698bfe328c1e43f12a0613John McCall llvm::Value *args[] = { Value, SrcRTTI, DestRTTI, OffsetHint }; 1850bd7370a78604e9a20d698bfe328c1e43f12a0613John McCall Value = CGF.EmitNounwindRuntimeCall(getDynamicCastFn(CGF), args); 1851f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson Value = CGF.Builder.CreateBitCast(Value, DestLTy); 1852f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1853f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson /// C++ [expr.dynamic.cast]p9: 1854f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson /// A failed cast to reference type throws std::bad_cast 1855f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (DestTy->isReferenceType()) { 1856f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::BasicBlock *BadCastBlock = 1857f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CGF.createBasicBlock("dynamic_cast.bad_cast"); 1858f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1859f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::Value *IsNull = CGF.Builder.CreateIsNull(Value); 1860f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CGF.Builder.CreateCondBr(IsNull, BadCastBlock, CastEnd); 1861f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1862f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CGF.EmitBlock(BadCastBlock); 18633ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson EmitBadCastCall(CGF); 1864c849c052d6b4b70f2651c1969531861a5f230053Mike Stump } 1865c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 1866f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson return Value; 1867f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson} 1868f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 18693ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlssonstatic llvm::Value *EmitDynamicCastToNull(CodeGenFunction &CGF, 18703ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson QualType DestTy) { 18712acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *DestLTy = CGF.ConvertType(DestTy); 18723ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson if (DestTy->isPointerType()) 18733ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson return llvm::Constant::getNullValue(DestLTy); 18743ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 18753ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson /// C++ [expr.dynamic.cast]p9: 18763ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson /// A failed cast to reference type throws std::bad_cast 18773ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson EmitBadCastCall(CGF); 18783ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 18793ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson CGF.EmitBlock(CGF.createBasicBlock("dynamic_cast.end")); 18803ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson return llvm::UndefValue::get(DestLTy); 18813ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson} 18823ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 1883f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlssonllvm::Value *CodeGenFunction::EmitDynamicCast(llvm::Value *Value, 1884f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson const CXXDynamicCastExpr *DCE) { 1885f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson QualType DestTy = DCE->getTypeAsWritten(); 1886c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 18873ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson if (DCE->isAlwaysNull()) 18883ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson return EmitDynamicCastToNull(*this, DestTy); 18893ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 18903ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson QualType SrcTy = DCE->getSubExpr()->getType(); 18913ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 1892f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // C++ [expr.dynamic.cast]p4: 1893f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // If the value of v is a null pointer value in the pointer case, the result 1894f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // is the null pointer value of type T. 1895f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson bool ShouldNullCheckSrcValue = SrcTy->isPointerType(); 1896f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1897f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::BasicBlock *CastNull = 0; 1898f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::BasicBlock *CastNotNull = 0; 1899f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::BasicBlock *CastEnd = createBasicBlock("dynamic_cast.end"); 1900f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1901f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (ShouldNullCheckSrcValue) { 1902f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CastNull = createBasicBlock("dynamic_cast.null"); 1903f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CastNotNull = createBasicBlock("dynamic_cast.notnull"); 1904c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 1905f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::Value *IsNull = Builder.CreateIsNull(Value); 1906f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson Builder.CreateCondBr(IsNull, CastNull, CastNotNull); 1907f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson EmitBlock(CastNotNull); 1908c849c052d6b4b70f2651c1969531861a5f230053Mike Stump } 1909f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1910f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson Value = EmitDynamicCastCall(*this, Value, SrcTy, DestTy, CastEnd); 1911f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1912f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (ShouldNullCheckSrcValue) { 1913f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson EmitBranch(CastEnd); 1914f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1915f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson EmitBlock(CastNull); 1916f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson EmitBranch(CastEnd); 1917c849c052d6b4b70f2651c1969531861a5f230053Mike Stump } 1918f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1919f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson EmitBlock(CastEnd); 1920f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1921f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (ShouldNullCheckSrcValue) { 1922f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::PHINode *PHI = Builder.CreatePHI(Value->getType(), 2); 1923f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson PHI->addIncoming(Value, CastNotNull); 1924f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson PHI->addIncoming(llvm::Constant::getNullValue(Value->getType()), CastNull); 1925f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1926f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson Value = PHI; 1927c849c052d6b4b70f2651c1969531861a5f230053Mike Stump } 1928c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 1929f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson return Value; 1930c849c052d6b4b70f2651c1969531861a5f230053Mike Stump} 19314c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman 19324c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedmanvoid CodeGenFunction::EmitLambdaExpr(const LambdaExpr *E, AggValueSlot Slot) { 1933f8823e7ae00d2b0a9395b51b7bd53b505df72031Eli Friedman RunCleanupsScope Scope(*this); 1934377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman LValue SlotLV = MakeAddrLValue(Slot.getAddr(), E->getType(), 1935377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman Slot.getAlignment()); 1936f8823e7ae00d2b0a9395b51b7bd53b505df72031Eli Friedman 19374c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman CXXRecordDecl::field_iterator CurField = E->getLambdaClass()->field_begin(); 19384c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman for (LambdaExpr::capture_init_iterator i = E->capture_init_begin(), 19394c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman e = E->capture_init_end(); 1940c07b18ed2b207b17cf8d770966e5c1e52d46f4ecEric Christopher i != e; ++i, ++CurField) { 19414c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman // Emit initialization 1942377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman 1943581deb3da481053c4993c7600f97acf7768caac5David Blaikie LValue LV = EmitLValueForFieldInitialization(SlotLV, *CurField); 1944b74ed087469db042325bad76fdf3ff6ed67dec09Eli Friedman ArrayRef<VarDecl *> ArrayIndexes; 1945b74ed087469db042325bad76fdf3ff6ed67dec09Eli Friedman if (CurField->getType()->isArrayType()) 1946b74ed087469db042325bad76fdf3ff6ed67dec09Eli Friedman ArrayIndexes = E->getCaptureInitIndexVars(i); 1947581deb3da481053c4993c7600f97acf7768caac5David Blaikie EmitInitializerForField(*CurField, LV, *i, ArrayIndexes); 19484c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman } 19494c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman} 1950