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" 198b54999a831bb195c08541ca995ef0505c96193fMark Lacey#include "clang/CodeGen/CGFunctionInfo.h" 2055fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Frontend/CodeGenOptions.h" 21651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#include "llvm/IR/CallSite.h" 223b844ba7d5be205a9b4f5f0b0d1b7978977f4b8cChandler Carruth#include "llvm/IR/Intrinsics.h" 23ad3692bbe1874abafae1757a2b9d3bfa2249dc43Anders Carlsson 2416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlssonusing namespace clang; 2516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlssonusing namespace CodeGen; 2616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 273b5ad2283c999f6edf7d42332a655447b7386b2eAnders CarlssonRValue CodeGenFunction::EmitCXXMemberCall(const CXXMethodDecl *MD, 284def70d3040e73707c738f7c366737a986135edfRichard Smith SourceLocation CallLoc, 293b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson llvm::Value *Callee, 303b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson ReturnValueSlot ReturnValue, 313b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson llvm::Value *This, 3259660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov llvm::Value *ImplicitParam, 3359660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov QualType ImplicitParamTy, 343b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson CallExpr::const_arg_iterator ArgBeg, 353b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson CallExpr::const_arg_iterator ArgEnd) { 363b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson assert(MD->isInstance() && 373b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson "Trying to emit a member call expr on a static method!"); 383b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 392c9f87ca5cccbfdaad82762368af5b2323320653Richard Smith // C++11 [class.mfct.non-static]p2: 402c9f87ca5cccbfdaad82762368af5b2323320653Richard Smith // If a non-static member function of a class X is called for an object that 412c9f87ca5cccbfdaad82762368af5b2323320653Richard Smith // is not of type X, or of a type derived from X, the behavior is undefined. 428e1cee6f23e2552b96b81e5ef419ab3f69c5b5c2Richard Smith EmitTypeCheck(isa<CXXConstructorDecl>(MD) ? TCK_ConstructorCall 438e1cee6f23e2552b96b81e5ef419ab3f69c5b5c2Richard Smith : TCK_MemberCall, 448e1cee6f23e2552b96b81e5ef419ab3f69c5b5c2Richard Smith CallLoc, This, getContext().getRecordType(MD->getParent())); 452c9f87ca5cccbfdaad82762368af5b2323320653Richard Smith 463b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson CallArgList Args; 473b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 483b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Push the this ptr. 4904c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman Args.add(RValue::get(This), MD->getThisType(getContext())); 503b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 5159660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov // If there is an implicit parameter (e.g. VTT), emit it. 5259660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov if (ImplicitParam) { 5359660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov Args.add(RValue::get(ImplicitParam), ImplicitParamTy); 54c997d4278d329e18891aac9698fb991b2d4622ebAnders Carlsson } 55de5d3c717684f3821b8db58037bc7140acf134aaJohn McCall 56de5d3c717684f3821b8db58037bc7140acf134aaJohn McCall const FunctionProtoType *FPT = MD->getType()->castAs<FunctionProtoType>(); 57de5d3c717684f3821b8db58037bc7140acf134aaJohn McCall RequiredArgs required = RequiredArgs::forPrototypePlus(FPT, Args.size()); 58c997d4278d329e18891aac9698fb991b2d4622ebAnders Carlsson 59de5d3c717684f3821b8db58037bc7140acf134aaJohn McCall // And the rest of the call args. 603b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson EmitCallArgs(Args, FPT, ArgBeg, ArgEnd); 613b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 620f3d0970dcdf6cf17550b86838dff12813968dbcJohn McCall return EmitCall(CGM.getTypes().arrangeCXXMethodCall(Args, FPT, required), 63264ba48dc98f3f843935a485d5b086f7e0fdc4f1Rafael Espindola Callee, ReturnValue, Args, MD); 643b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson} 653b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 66ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindolastatic CXXRecordDecl *getCXXRecord(const Expr *E) { 67ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola QualType T = E->getType(); 68ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola if (const PointerType *PTy = T->getAs<PointerType>()) 69ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola T = PTy->getPointeeType(); 70ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola const RecordType *Ty = T->castAs<RecordType>(); 71ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola return cast<CXXRecordDecl>(Ty->getDecl()); 72ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola} 73ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola 74dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet// Note: This function also emit constructor calls to support a MSVC 75dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet// extensions allowing explicit constructor function call. 763b5ad2283c999f6edf7d42332a655447b7386b2eAnders CarlssonRValue CodeGenFunction::EmitCXXMemberCallExpr(const CXXMemberCallExpr *CE, 773b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson ReturnValueSlot ReturnValue) { 78379b5155b4566f63679e1da6b0ceb5fdfa2aec6dJohn McCall const Expr *callee = CE->getCallee()->IgnoreParens(); 79379b5155b4566f63679e1da6b0ceb5fdfa2aec6dJohn McCall 80379b5155b4566f63679e1da6b0ceb5fdfa2aec6dJohn McCall if (isa<BinaryOperator>(callee)) 813b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson return EmitCXXMemberPointerCallExpr(CE, ReturnValue); 82379b5155b4566f63679e1da6b0ceb5fdfa2aec6dJohn McCall 83379b5155b4566f63679e1da6b0ceb5fdfa2aec6dJohn McCall const MemberExpr *ME = cast<MemberExpr>(callee); 843b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const CXXMethodDecl *MD = cast<CXXMethodDecl>(ME->getMemberDecl()); 853b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 863b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson if (MD->isStatic()) { 873b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // The method is static, emit it as we would a regular call. 883b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson llvm::Value *Callee = CGM.GetAddrOfFunction(MD); 893b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson return EmitCall(getContext().getPointerType(MD->getType()), Callee, 90b914e87377fd4d7642f544000a79f8648c6f06c9Peter Collingbourne CE->getLocStart(), ReturnValue, CE->arg_begin(), 91b914e87377fd4d7642f544000a79f8648c6f06c9Peter Collingbourne CE->arg_end()); 923b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 933b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 94fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall // Compute the object pointer. 95632fbaa22fbed7c090eb83775731bfff786c2198Rafael Espindola const Expr *Base = ME->getBase(); 96632fbaa22fbed7c090eb83775731bfff786c2198Rafael Espindola bool CanUseVirtualCall = MD->isVirtual() && !ME->hasQualifier(); 97632fbaa22fbed7c090eb83775731bfff786c2198Rafael Espindola 986bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines const CXXMethodDecl *DevirtualizedMethod = nullptr; 999581ed07dee5376002620a0cfb363c6b9e5bdd3eBenjamin Kramer if (CanUseVirtualCall && CanDevirtualizeMemberFunctionCall(Base, MD)) { 100ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola const CXXRecordDecl *BestDynamicDecl = Base->getBestDynamicClassType(); 101ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola DevirtualizedMethod = MD->getCorrespondingMethodInClass(BestDynamicDecl); 102ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola assert(DevirtualizedMethod); 103ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola const CXXRecordDecl *DevirtualizedClass = DevirtualizedMethod->getParent(); 104ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola const Expr *Inner = Base->ignoreParenBaseCasts(); 105ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola if (getCXXRecord(Inner) == DevirtualizedClass) 106ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // If the class of the Inner expression is where the dynamic method 107ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // is defined, build the this pointer from it. 108ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola Base = Inner; 109ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola else if (getCXXRecord(Base) != DevirtualizedClass) { 110ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // If the method is defined in a class that is not the best dynamic 111ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // one or the one of the full expression, we would have to build 112ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // a derived-to-base cast to compute the correct this pointer, but 113ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola // we don't have support for that yet, so do a virtual call. 1146bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines DevirtualizedMethod = nullptr; 115ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola } 11680bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola // If the return types are not the same, this might be a case where more 11780bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola // code needs to run to compensate for it. For example, the derived 11880bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola // method might return a type that inherits form from the return 11980bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola // type of MD and has a prefix. 12080bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola // For now we just avoid devirtualizing these covariant cases. 12180bc96e6aa9bc8331473385150cff5e0db305da6Rafael Espindola if (DevirtualizedMethod && 122651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines DevirtualizedMethod->getReturnType().getCanonicalType() != 123651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines MD->getReturnType().getCanonicalType()) 1246bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines DevirtualizedMethod = nullptr; 125ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola } 126632fbaa22fbed7c090eb83775731bfff786c2198Rafael Espindola 1273b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson llvm::Value *This; 1283b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson if (ME->isArrow()) 129ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola This = EmitScalarExpr(Base); 1300e800c9c20d1a658a91096c756c4a4a9e90264fcJohn McCall else 131ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola This = EmitLValue(Base).getAddress(); 132632fbaa22fbed7c090eb83775731bfff786c2198Rafael Espindola 1333b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 134fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall if (MD->isTrivial()) { 1356bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (isa<CXXDestructorDecl>(MD)) return RValue::get(nullptr); 136dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet if (isa<CXXConstructorDecl>(MD) && 137dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet cast<CXXConstructorDecl>(MD)->isDefaultConstructor()) 1386bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return RValue::get(nullptr); 139dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet 14085ea7aa961deac1d754f610af8062ae3f8b4e2a5Sebastian Redl if (MD->isCopyAssignmentOperator() || MD->isMoveAssignmentOperator()) { 14185ea7aa961deac1d754f610af8062ae3f8b4e2a5Sebastian Redl // We don't like to generate the trivial copy/move assignment operator 14285ea7aa961deac1d754f610af8062ae3f8b4e2a5Sebastian Redl // when it isn't necessary; just produce the proper effect here. 143dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet llvm::Value *RHS = EmitLValue(*CE->arg_begin()).getAddress(); 1446cacae8bf9597b8124cd40aedc189c04484e1990Benjamin Kramer EmitAggregateAssign(This, RHS, CE->getType()); 145dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet return RValue::get(This); 146dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet } 147dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet 148dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet if (isa<CXXConstructorDecl>(MD) && 14985ea7aa961deac1d754f610af8062ae3f8b4e2a5Sebastian Redl cast<CXXConstructorDecl>(MD)->isCopyOrMoveConstructor()) { 15085ea7aa961deac1d754f610af8062ae3f8b4e2a5Sebastian Redl // Trivial move and copy ctor are the same. 151dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet llvm::Value *RHS = EmitLValue(*CE->arg_begin()).getAddress(); 152dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet EmitSynthesizedCXXCopyCtorCall(cast<CXXConstructorDecl>(MD), This, RHS, 153dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet CE->arg_begin(), CE->arg_end()); 154dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet return RValue::get(This); 155dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet } 156dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet llvm_unreachable("unknown trivial member function"); 1573b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 1583b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 159fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall // Compute the function type we're calling. 160465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman const CXXMethodDecl *CalleeDecl = DevirtualizedMethod ? DevirtualizedMethod : MD; 1616bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines const CGFunctionInfo *FInfo = nullptr; 162465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman if (const CXXDestructorDecl *Dtor = dyn_cast<CXXDestructorDecl>(CalleeDecl)) 163465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman FInfo = &CGM.getTypes().arrangeCXXDestructor(Dtor, 164de5d3c717684f3821b8db58037bc7140acf134aaJohn McCall Dtor_Complete); 165465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman else if (const CXXConstructorDecl *Ctor = dyn_cast<CXXConstructorDecl>(CalleeDecl)) 166465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman FInfo = &CGM.getTypes().arrangeCXXConstructorDeclaration(Ctor, 167465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman Ctor_Complete); 168dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet else 169465e89e094004a2ff53ba930ca0c4b41e51299baEli Friedman FInfo = &CGM.getTypes().arrangeCXXMethodDeclaration(CalleeDecl); 170fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall 171a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner llvm::FunctionType *Ty = CGM.getTypes().GetFunctionType(*FInfo); 172fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall 1733b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // C++ [class.virtual]p12: 1743b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Explicit qualification with the scope operator (5.1) suppresses the 1753b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // virtual call mechanism. 1763b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // 1773b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // We also don't emit a virtual call if the base expression has a record type 1783b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // because then we know what the type is. 179ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola bool UseVirtualCall = CanUseVirtualCall && !DevirtualizedMethod; 1803258abc2bad74e8bb1799d124bc4113c7234fa42Stephen Lin llvm::Value *Callee; 1813b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin 182fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall if (const CXXDestructorDecl *Dtor = dyn_cast<CXXDestructorDecl>(MD)) { 1833b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin assert(CE->arg_begin() == CE->arg_end() && 1843b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin "Destructor shouldn't have explicit parameters"); 1853b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin assert(ReturnValue.isNull() && "Destructor shouldn't have return value"); 186fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall if (UseVirtualCall) { 1873b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin CGM.getCXXABI().EmitVirtualDestructorCall(*this, Dtor, Dtor_Complete, 1883b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin CE->getExprLoc(), This); 1893b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } else { 1907edf9e38b91917b661277601c0e448eef0eb2b56Richard Smith if (getLangOpts().AppleKext && 191ccd5259d33cbbdd6f5fbf7ccab4cb4a2702309eaFariborz Jahanian MD->isVirtual() && 192ccd5259d33cbbdd6f5fbf7ccab4cb4a2702309eaFariborz Jahanian ME->hasQualifier()) 193771c678c04f5f685b4f188ec6c2fd88ad0f7457fFariborz Jahanian Callee = BuildAppleKextVirtualCall(MD, ME->getQualifier(), Ty); 194ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola else if (!DevirtualizedMethod) 195a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner Callee = CGM.GetAddrOfCXXDestructor(Dtor, Dtor_Complete, FInfo, Ty); 1960b4fe503ef00d9f8ea330850d3e3b303e9c7c876Rafael Espindola else { 197ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola const CXXDestructorDecl *DDtor = 198ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola cast<CXXDestructorDecl>(DevirtualizedMethod); 1990b4fe503ef00d9f8ea330850d3e3b303e9c7c876Rafael Espindola Callee = CGM.GetAddrOfFunction(GlobalDecl(DDtor, Dtor_Complete), Ty); 2000b4fe503ef00d9f8ea330850d3e3b303e9c7c876Rafael Espindola } 2013b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin EmitCXXMemberCall(MD, CE->getExprLoc(), Callee, ReturnValue, This, 2026bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines /*ImplicitParam=*/nullptr, QualType(), nullptr,nullptr); 2033b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 2046bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return RValue::get(nullptr); 2053b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin } 2063b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin 2073b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin if (const CXXConstructorDecl *Ctor = dyn_cast<CXXConstructorDecl>(MD)) { 208dbee3411a22b0dbb03267f5445f7b796104991bbFrancois Pichet Callee = CGM.GetAddrOfFunction(GlobalDecl(Ctor, Ctor_Complete), Ty); 209fc4002872864e3c29c896000519ae989b6fdb7ddJohn McCall } else if (UseVirtualCall) { 2108f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov Callee = CGM.getCXXABI().getVirtualFunctionPointer(*this, MD, This, Ty); 2113b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } else { 2127edf9e38b91917b661277601c0e448eef0eb2b56Richard Smith if (getLangOpts().AppleKext && 213a50e33eb0ff7b73d44aebce88de3732583a7e960Fariborz Jahanian MD->isVirtual() && 2147ac0ff2a8791280102a557761dbb931deb21a1dcFariborz Jahanian ME->hasQualifier()) 215771c678c04f5f685b4f188ec6c2fd88ad0f7457fFariborz Jahanian Callee = BuildAppleKextVirtualCall(MD, ME->getQualifier(), Ty); 216ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola else if (!DevirtualizedMethod) 21712582bdc2e1fca260eb2437d87dab5302c37bab2Rafael Espindola Callee = CGM.GetAddrOfFunction(MD, Ty); 2180b4fe503ef00d9f8ea330850d3e3b303e9c7c876Rafael Espindola else { 219ea01d7661751e062bb670cc1a0bdfee5789cb96fRafael Espindola Callee = CGM.GetAddrOfFunction(DevirtualizedMethod, Ty); 2200b4fe503ef00d9f8ea330850d3e3b303e9c7c876Rafael Espindola } 2213b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 2223b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 223651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MD->isVirtual()) { 224651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines This = CGM.getCXXABI().adjustThisArgumentForVirtualFunctionCall( 225651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines *this, MD, This, UseVirtualCall); 226651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines } 2278f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov 2284def70d3040e73707c738f7c366737a986135edfRichard Smith return EmitCXXMemberCall(MD, CE->getExprLoc(), Callee, ReturnValue, This, 2296bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines /*ImplicitParam=*/nullptr, QualType(), 23059660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov CE->arg_begin(), CE->arg_end()); 2313b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson} 2323b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 2333b5ad2283c999f6edf7d42332a655447b7386b2eAnders CarlssonRValue 2343b5ad2283c999f6edf7d42332a655447b7386b2eAnders CarlssonCodeGenFunction::EmitCXXMemberPointerCallExpr(const CXXMemberCallExpr *E, 2353b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson ReturnValueSlot ReturnValue) { 2363b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const BinaryOperator *BO = 2373b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson cast<BinaryOperator>(E->getCallee()->IgnoreParens()); 2383b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const Expr *BaseExpr = BO->getLHS(); 2393b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const Expr *MemFnExpr = BO->getRHS(); 2403b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 2413b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const MemberPointerType *MPT = 242864c041e118155c2b1ce0ba36942a3da5a4a055eJohn McCall MemFnExpr->getType()->castAs<MemberPointerType>(); 24393d557bc1867b7d7b102f87290194b4be7932c92John McCall 2443b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const FunctionProtoType *FPT = 245864c041e118155c2b1ce0ba36942a3da5a4a055eJohn McCall MPT->getPointeeType()->castAs<FunctionProtoType>(); 2463b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const CXXRecordDecl *RD = 2473b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson cast<CXXRecordDecl>(MPT->getClass()->getAs<RecordType>()->getDecl()); 2483b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 2493b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Get the member function pointer. 250d608cdb7c044365cf4e8764ade1e11e99c176078John McCall llvm::Value *MemFnPtr = EmitScalarExpr(MemFnExpr); 2513b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 2523b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Emit the 'this' pointer. 2533b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson llvm::Value *This; 2543b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 2552de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (BO->getOpcode() == BO_PtrMemI) 2563b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson This = EmitScalarExpr(BaseExpr); 2573b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson else 2583b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson This = EmitLValue(BaseExpr).getAddress(); 2593b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 2604def70d3040e73707c738f7c366737a986135edfRichard Smith EmitTypeCheck(TCK_MemberCall, E->getExprLoc(), This, 2614def70d3040e73707c738f7c366737a986135edfRichard Smith QualType(MPT->getClass(), 0)); 2622c9f87ca5cccbfdaad82762368af5b2323320653Richard Smith 26393d557bc1867b7d7b102f87290194b4be7932c92John McCall // Ask the ABI to load the callee. Note that This is modified. 26493d557bc1867b7d7b102f87290194b4be7932c92John McCall llvm::Value *Callee = 265651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CGM.getCXXABI().EmitLoadOfMemberFunctionPointer(*this, BO, This, MemFnPtr, MPT); 2663b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 2673b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson CallArgList Args; 2683b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 2693b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson QualType ThisType = 2703b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson getContext().getPointerType(getContext().getTagDeclType(RD)); 2713b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 2723b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Push the this ptr. 27304c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman Args.add(RValue::get(This), ThisType); 2740f3d0970dcdf6cf17550b86838dff12813968dbcJohn McCall 2750f3d0970dcdf6cf17550b86838dff12813968dbcJohn McCall RequiredArgs required = RequiredArgs::forPrototypePlus(FPT, 1); 2763b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 2773b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // And the rest of the call args 2783b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson EmitCallArgs(Args, FPT, E->arg_begin(), E->arg_end()); 2795d4a7559df106959dd721744c8971547f0f09097Nick Lewycky return EmitCall(CGM.getTypes().arrangeCXXMethodCall(Args, FPT, required), 2805d4a7559df106959dd721744c8971547f0f09097Nick Lewycky Callee, ReturnValue, Args); 2813b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson} 2823b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 2833b5ad2283c999f6edf7d42332a655447b7386b2eAnders CarlssonRValue 2843b5ad2283c999f6edf7d42332a655447b7386b2eAnders CarlssonCodeGenFunction::EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E, 2853b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const CXXMethodDecl *MD, 2863b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson ReturnValueSlot ReturnValue) { 2873b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson assert(MD->isInstance() && 2883b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson "Trying to emit a member call expr on a static method!"); 2890e800c9c20d1a658a91096c756c4a4a9e90264fcJohn McCall LValue LV = EmitLValue(E->getArg(0)); 2900e800c9c20d1a658a91096c756c4a4a9e90264fcJohn McCall llvm::Value *This = LV.getAddress(); 2910e800c9c20d1a658a91096c756c4a4a9e90264fcJohn McCall 292b2b5658a8e4ad566303ec98caceaa3485e7635f7Douglas Gregor if ((MD->isCopyAssignmentOperator() || MD->isMoveAssignmentOperator()) && 293b2b5658a8e4ad566303ec98caceaa3485e7635f7Douglas Gregor MD->isTrivial()) { 294b2b5658a8e4ad566303ec98caceaa3485e7635f7Douglas Gregor llvm::Value *Src = EmitLValue(E->getArg(1)).getAddress(); 295b2b5658a8e4ad566303ec98caceaa3485e7635f7Douglas Gregor QualType Ty = E->getType(); 2966cacae8bf9597b8124cd40aedc189c04484e1990Benjamin Kramer EmitAggregateAssign(This, Src, Ty); 297b2b5658a8e4ad566303ec98caceaa3485e7635f7Douglas Gregor return RValue::get(This); 2983b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 2993b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 300a2447e0d1e28669cd637204a871f15b1215277fdAnders Carlsson llvm::Value *Callee = EmitCXXOperatorMemberCallee(E, MD, This); 3014def70d3040e73707c738f7c366737a986135edfRichard Smith return EmitCXXMemberCall(MD, E->getExprLoc(), Callee, ReturnValue, This, 3026bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines /*ImplicitParam=*/nullptr, QualType(), 30359660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov E->arg_begin() + 1, E->arg_end()); 3043b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson} 3053b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 3066c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter CollingbourneRValue CodeGenFunction::EmitCUDAKernelCallExpr(const CUDAKernelCallExpr *E, 3076c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne ReturnValueSlot ReturnValue) { 3086c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne return CGM.getCUDARuntime().EmitCUDAKernelCallExpr(*this, E, ReturnValue); 3096c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne} 3106c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne 3112ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedmanstatic void EmitNullBaseClassInitialization(CodeGenFunction &CGF, 3122ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::Value *DestPtr, 3132ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman const CXXRecordDecl *Base) { 3142ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman if (Base->isEmpty()) 3152ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman return; 3162ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 3172ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman DestPtr = CGF.EmitCastToVoidPtr(DestPtr); 3182ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 3192ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman const ASTRecordLayout &Layout = CGF.getContext().getASTRecordLayout(Base); 3202ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman CharUnits Size = Layout.getNonVirtualSize(); 321651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CharUnits Align = Layout.getNonVirtualAlignment(); 3222ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 3232ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::Value *SizeVal = CGF.CGM.getSize(Size); 3242ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 3252ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // If the type contains a pointer to data member we can't memset it to zero. 3262ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // Instead, create a null constant and copy it to the destination. 3272ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // TODO: there are other patterns besides zero that we can usefully memset, 3282ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // like -1, which happens to be the pattern used by member-pointers. 3292ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // TODO: isZeroInitializable can be over-conservative in the case where a 3302ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // virtual base contains a member pointer. 3312ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman if (!CGF.CGM.getTypes().isZeroInitializable(Base)) { 3322ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::Constant *NullConstant = CGF.CGM.EmitNullConstantForBase(Base); 3332ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 3342ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::GlobalVariable *NullVariable = 3352ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman new llvm::GlobalVariable(CGF.CGM.getModule(), NullConstant->getType(), 3362ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman /*isConstant=*/true, 3372ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::GlobalVariable::PrivateLinkage, 3382ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman NullConstant, Twine()); 3392ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman NullVariable->setAlignment(Align.getQuantity()); 3402ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman llvm::Value *SrcPtr = CGF.EmitCastToVoidPtr(NullVariable); 3412ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 3422ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // Get and call the appropriate llvm.memcpy overload. 3432ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman CGF.Builder.CreateMemCpy(DestPtr, SrcPtr, SizeVal, Align.getQuantity()); 3442ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman return; 3452ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman } 3462ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 3472ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // Otherwise, just memset the whole thing to zero. This is legal 3482ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // because in LLVM, all default initializers (other than the ones we just 3492ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman // handled above) are guaranteed to have a bit pattern of all zeros. 3502ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman CGF.Builder.CreateMemSet(DestPtr, CGF.Builder.getInt8(0), SizeVal, 3512ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman Align.getQuantity()); 3522ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman} 3532ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman 3543b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlssonvoid 355558d2abc7f9fd6801cc7677200992313ae90b5d8John McCallCodeGenFunction::EmitCXXConstructExpr(const CXXConstructExpr *E, 356558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall AggValueSlot Dest) { 357558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall assert(!Dest.isIgnored() && "Must have a destination!"); 3583b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson const CXXConstructorDecl *CD = E->getConstructor(); 359759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor 360759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor // If we require zero initialization before (or instead of) calling the 361759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor // constructor, as can be the case with a non-user-provided default 362657baf19ca8a48a926bd3bc148b6ad1b17e53199Argyrios Kyrtzidis // constructor, emit the zero initialization now, unless destination is 363657baf19ca8a48a926bd3bc148b6ad1b17e53199Argyrios Kyrtzidis // already zeroed. 3642ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman if (E->requiresZeroInitialization() && !Dest.isZeroed()) { 3652ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman switch (E->getConstructionKind()) { 3662ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman case CXXConstructExpr::CK_Delegating: 3672ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman case CXXConstructExpr::CK_Complete: 3682ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman EmitNullInitialization(Dest.getAddr(), E->getType()); 3692ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman break; 3702ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman case CXXConstructExpr::CK_VirtualBase: 3712ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman case CXXConstructExpr::CK_NonVirtualBase: 3722ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman EmitNullBaseClassInitialization(*this, Dest.getAddr(), CD->getParent()); 3732ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman break; 3742ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman } 3752ed7cb649aa709b875c519f4a980a1e2b5712370Eli Friedman } 376759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor 377759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor // If this is a call to a trivial default constructor, do nothing. 378759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor if (CD->isTrivial() && CD->isDefaultConstructor()) 379759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor return; 380759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor 381fc1e6c79bbfe0e9a58bb792996d51f42e36e3d6aJohn McCall // Elide the constructor if we're constructing from a temporary. 382fc1e6c79bbfe0e9a58bb792996d51f42e36e3d6aJohn McCall // The temporary check is required because Sema sets this on NRVO 383fc1e6c79bbfe0e9a58bb792996d51f42e36e3d6aJohn McCall // returns. 3847edf9e38b91917b661277601c0e448eef0eb2b56Richard Smith if (getLangOpts().ElideConstructors && E->isElidable()) { 385fc1e6c79bbfe0e9a58bb792996d51f42e36e3d6aJohn McCall assert(getContext().hasSameUnqualifiedType(E->getType(), 386fc1e6c79bbfe0e9a58bb792996d51f42e36e3d6aJohn McCall E->getArg(0)->getType())); 387558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall if (E->getArg(0)->isTemporaryObject(getContext(), CD->getParent())) { 388558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall EmitAggExpr(E->getArg(0), Dest); 3893c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor return; 3903c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor } 3913b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson } 392759e41baf6a95c3a265970b6bf1c97c233fd28b0Douglas Gregor 393c3c0766277cd64bf117450a1519c9cf762d994d4John McCall if (const ConstantArrayType *arrayType 394c3c0766277cd64bf117450a1519c9cf762d994d4John McCall = getContext().getAsConstantArrayType(E->getType())) { 395c3c0766277cd64bf117450a1519c9cf762d994d4John McCall EmitCXXAggrConstructorCall(CD, arrayType, Dest.getAddr(), 3963b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson E->arg_begin(), E->arg_end()); 397c3c0766277cd64bf117450a1519c9cf762d994d4John McCall } else { 3986bd2f6ad857949d4dfb6e75e0760c61950b917cfCameron Esfahani CXXCtorType Type = Ctor_Complete; 399d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt bool ForVirtualBase = false; 400378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor bool Delegating = false; 401378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor 402d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt switch (E->getConstructionKind()) { 403d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt case CXXConstructExpr::CK_Delegating: 404059ce0d92eb5a7da900ae735dc0a2ea3d64f4b0bSean Hunt // We should be emitting a constructor; GlobalDecl will assert this 405059ce0d92eb5a7da900ae735dc0a2ea3d64f4b0bSean Hunt Type = CurGD.getCtorType(); 406378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor Delegating = true; 407d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt break; 408059ce0d92eb5a7da900ae735dc0a2ea3d64f4b0bSean Hunt 409d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt case CXXConstructExpr::CK_Complete: 410d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt Type = Ctor_Complete; 411d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt break; 412d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt 413d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt case CXXConstructExpr::CK_VirtualBase: 414d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt ForVirtualBase = true; 415d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt // fall-through 416d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt 417d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt case CXXConstructExpr::CK_NonVirtualBase: 418d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt Type = Ctor_Base; 419d49bd5515b89bedc57c3d1d3be457e4340dbdb1dSean Hunt } 420155ed4a23366f4514befb1c9f5f89d16f8b8b6dbAnders Carlsson 4213b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson // Call the constructor. 422378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor EmitCXXConstructorCall(CD, Type, ForVirtualBase, Delegating, Dest.getAddr(), 4233b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson E->arg_begin(), E->arg_end()); 424155ed4a23366f4514befb1c9f5f89d16f8b8b6dbAnders Carlsson } 4253b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson} 4263b5ad2283c999f6edf7d42332a655447b7386b2eAnders Carlsson 42734999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanianvoid 42834999876e215b22febc240b1a6dc054215d12f9cFariborz JahanianCodeGenFunction::EmitSynthesizedCXXCopyCtor(llvm::Value *Dest, 42934999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian llvm::Value *Src, 430830937bc1100fba7682f7c32c40512085870f50cFariborz Jahanian const Expr *Exp) { 4314765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall if (const ExprWithCleanups *E = dyn_cast<ExprWithCleanups>(Exp)) 43234999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian Exp = E->getSubExpr(); 43334999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian assert(isa<CXXConstructExpr>(Exp) && 43434999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian "EmitSynthesizedCXXCopyCtor - unknown copy ctor expr"); 43534999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian const CXXConstructExpr* E = cast<CXXConstructExpr>(Exp); 43634999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian const CXXConstructorDecl *CD = E->getConstructor(); 43734999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian RunCleanupsScope Scope(*this); 43834999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian 43934999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian // If we require zero initialization before (or instead of) calling the 44034999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian // constructor, as can be the case with a non-user-provided default 44134999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian // constructor, emit the zero initialization now. 44234999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian // FIXME. Do I still need this for a copy ctor synthesis? 44334999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian if (E->requiresZeroInitialization()) 44434999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian EmitNullInitialization(Dest, E->getType()); 44534999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian 446858a546d8fe73b07f2296313bef2e30445ea164bChandler Carruth assert(!getContext().getAsConstantArrayType(E->getType()) 447858a546d8fe73b07f2296313bef2e30445ea164bChandler Carruth && "EmitSynthesizedCXXCopyCtor - Copied-in Array"); 4485d4a7559df106959dd721744c8971547f0f09097Nick Lewycky EmitSynthesizedCXXCopyCtorCall(CD, Dest, Src, E->arg_begin(), E->arg_end()); 44934999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian} 45034999876e215b22febc240b1a6dc054215d12f9cFariborz Jahanian 4511e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCallstatic CharUnits CalculateCookiePadding(CodeGenFunction &CGF, 4521e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const CXXNewExpr *E) { 453871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson if (!E->isArray()) 454caf647c33ad74621c352c21d6c50d149ba49e89dKen Dyck return CharUnits::Zero(); 455871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson 456b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // No cookie is required if the operator new[] being used is the 457b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // reserved placement operator new[]. 458b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall if (E->getOperatorNew()->isReservedGlobalPlacementOperator()) 4595172ed92b42f0bc6a022542a08f7b18af821bcb3John McCall return CharUnits::Zero(); 4605172ed92b42f0bc6a022542a08f7b18af821bcb3John McCall 4616ec278d1a354517e20f13a877481453ee7940c78John McCall return CGF.CGM.getCXXABI().GetArrayCookieSize(E); 462a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson} 463a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 4647d16627081caede9691a6f46b796da4073ac14adJohn McCallstatic llvm::Value *EmitCXXNewAllocSize(CodeGenFunction &CGF, 4657d16627081caede9691a6f46b796da4073ac14adJohn McCall const CXXNewExpr *e, 4669203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl unsigned minElements, 4677d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *&numElements, 4687d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *&sizeWithoutCookie) { 4697d16627081caede9691a6f46b796da4073ac14adJohn McCall QualType type = e->getAllocatedType(); 4707d16627081caede9691a6f46b796da4073ac14adJohn McCall 4717d16627081caede9691a6f46b796da4073ac14adJohn McCall if (!e->isArray()) { 4727d16627081caede9691a6f46b796da4073ac14adJohn McCall CharUnits typeSize = CGF.getContext().getTypeSizeInChars(type); 4737d16627081caede9691a6f46b796da4073ac14adJohn McCall sizeWithoutCookie 4747d16627081caede9691a6f46b796da4073ac14adJohn McCall = llvm::ConstantInt::get(CGF.SizeTy, typeSize.getQuantity()); 4757d16627081caede9691a6f46b796da4073ac14adJohn McCall return sizeWithoutCookie; 47659174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor } 477a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 4787d16627081caede9691a6f46b796da4073ac14adJohn McCall // The width of size_t. 4797d16627081caede9691a6f46b796da4073ac14adJohn McCall unsigned sizeWidth = CGF.SizeTy->getBitWidth(); 4807d16627081caede9691a6f46b796da4073ac14adJohn McCall 4811e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Figure out the cookie size. 4827d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt cookieSize(sizeWidth, 4837d16627081caede9691a6f46b796da4073ac14adJohn McCall CalculateCookiePadding(CGF, e).getQuantity()); 4841e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 485a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson // Emit the array size expression. 486e7ab92e1d62f9c243bbd1f42f72a7b3c2666d33eArgyrios Kyrtzidis // We multiply the size of all dimensions for NumElements. 487e7ab92e1d62f9c243bbd1f42f72a7b3c2666d33eArgyrios Kyrtzidis // e.g for 'int[2][3]', ElemType is 'int' and NumElements is 6. 4887d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = CGF.EmitScalarExpr(e->getArraySize()); 4897d16627081caede9691a6f46b796da4073ac14adJohn McCall assert(isa<llvm::IntegerType>(numElements->getType())); 4907d16627081caede9691a6f46b796da4073ac14adJohn McCall 4917d16627081caede9691a6f46b796da4073ac14adJohn McCall // The number of elements can be have an arbitrary integer type; 4927d16627081caede9691a6f46b796da4073ac14adJohn McCall // essentially, we need to multiply it by a constant factor, add a 4937d16627081caede9691a6f46b796da4073ac14adJohn McCall // cookie size, and verify that the result is representable as a 4947d16627081caede9691a6f46b796da4073ac14adJohn McCall // size_t. That's just a gloss, though, and it's wrong in one 4957d16627081caede9691a6f46b796da4073ac14adJohn McCall // important way: if the count is negative, it's an error even if 4967d16627081caede9691a6f46b796da4073ac14adJohn McCall // the cookie size would bring the total size >= 0. 497575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor bool isSigned 498575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor = e->getArraySize()->getType()->isSignedIntegerOrEnumerationType(); 4992acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::IntegerType *numElementsType 5007d16627081caede9691a6f46b796da4073ac14adJohn McCall = cast<llvm::IntegerType>(numElements->getType()); 5017d16627081caede9691a6f46b796da4073ac14adJohn McCall unsigned numElementsWidth = numElementsType->getBitWidth(); 5027d16627081caede9691a6f46b796da4073ac14adJohn McCall 5037d16627081caede9691a6f46b796da4073ac14adJohn McCall // Compute the constant factor. 5047d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt arraySizeMultiplier(sizeWidth, 1); 505e7ab92e1d62f9c243bbd1f42f72a7b3c2666d33eArgyrios Kyrtzidis while (const ConstantArrayType *CAT 5067d16627081caede9691a6f46b796da4073ac14adJohn McCall = CGF.getContext().getAsConstantArrayType(type)) { 5077d16627081caede9691a6f46b796da4073ac14adJohn McCall type = CAT->getElementType(); 5087d16627081caede9691a6f46b796da4073ac14adJohn McCall arraySizeMultiplier *= CAT->getSize(); 509e7ab92e1d62f9c243bbd1f42f72a7b3c2666d33eArgyrios Kyrtzidis } 510e7ab92e1d62f9c243bbd1f42f72a7b3c2666d33eArgyrios Kyrtzidis 5117d16627081caede9691a6f46b796da4073ac14adJohn McCall CharUnits typeSize = CGF.getContext().getTypeSizeInChars(type); 5127d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt typeSizeMultiplier(sizeWidth, typeSize.getQuantity()); 5137d16627081caede9691a6f46b796da4073ac14adJohn McCall typeSizeMultiplier *= arraySizeMultiplier; 5147d16627081caede9691a6f46b796da4073ac14adJohn McCall 5157d16627081caede9691a6f46b796da4073ac14adJohn McCall // This will be a size_t. 5167d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *size; 5176c552c1d5f47fbba00e6268d96a26ad026f2da2aChris Lattner 518806941eab5e1d62d7676e5cdc0e1d9e397ea78b4Chris Lattner // If someone is doing 'new int[42]' there is no need to do a dynamic check. 519806941eab5e1d62d7676e5cdc0e1d9e397ea78b4Chris Lattner // Don't bloat the -O0 code. 5207d16627081caede9691a6f46b796da4073ac14adJohn McCall if (llvm::ConstantInt *numElementsC = 5217d16627081caede9691a6f46b796da4073ac14adJohn McCall dyn_cast<llvm::ConstantInt>(numElements)) { 5227d16627081caede9691a6f46b796da4073ac14adJohn McCall const llvm::APInt &count = numElementsC->getValue(); 5237d16627081caede9691a6f46b796da4073ac14adJohn McCall 5247d16627081caede9691a6f46b796da4073ac14adJohn McCall bool hasAnyOverflow = false; 5257d16627081caede9691a6f46b796da4073ac14adJohn McCall 5267d16627081caede9691a6f46b796da4073ac14adJohn McCall // If 'count' was a negative number, it's an overflow. 5277d16627081caede9691a6f46b796da4073ac14adJohn McCall if (isSigned && count.isNegative()) 5287d16627081caede9691a6f46b796da4073ac14adJohn McCall hasAnyOverflow = true; 5297d16627081caede9691a6f46b796da4073ac14adJohn McCall 5307d16627081caede9691a6f46b796da4073ac14adJohn McCall // We want to do all this arithmetic in size_t. If numElements is 5317d16627081caede9691a6f46b796da4073ac14adJohn McCall // wider than that, check whether it's already too big, and if so, 5327d16627081caede9691a6f46b796da4073ac14adJohn McCall // overflow. 5337d16627081caede9691a6f46b796da4073ac14adJohn McCall else if (numElementsWidth > sizeWidth && 5347d16627081caede9691a6f46b796da4073ac14adJohn McCall numElementsWidth - sizeWidth > count.countLeadingZeros()) 5357d16627081caede9691a6f46b796da4073ac14adJohn McCall hasAnyOverflow = true; 5367d16627081caede9691a6f46b796da4073ac14adJohn McCall 5377d16627081caede9691a6f46b796da4073ac14adJohn McCall // Okay, compute a count at the right width. 5387d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt adjustedCount = count.zextOrTrunc(sizeWidth); 5397d16627081caede9691a6f46b796da4073ac14adJohn McCall 5409203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // If there is a brace-initializer, we cannot allocate fewer elements than 5419203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // there are initializers. If we do, that's treated like an overflow. 5429203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (adjustedCount.ult(minElements)) 5439203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl hasAnyOverflow = true; 5449203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 5457d16627081caede9691a6f46b796da4073ac14adJohn McCall // Scale numElements by that. This might overflow, but we don't 5467d16627081caede9691a6f46b796da4073ac14adJohn McCall // care because it only overflows if allocationSize does, too, and 5477d16627081caede9691a6f46b796da4073ac14adJohn McCall // if that overflows then we shouldn't use this. 5487d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = llvm::ConstantInt::get(CGF.SizeTy, 5497d16627081caede9691a6f46b796da4073ac14adJohn McCall adjustedCount * arraySizeMultiplier); 5507d16627081caede9691a6f46b796da4073ac14adJohn McCall 5517d16627081caede9691a6f46b796da4073ac14adJohn McCall // Compute the size before cookie, and track whether it overflowed. 5527d16627081caede9691a6f46b796da4073ac14adJohn McCall bool overflow; 5537d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt allocationSize 5547d16627081caede9691a6f46b796da4073ac14adJohn McCall = adjustedCount.umul_ov(typeSizeMultiplier, overflow); 5557d16627081caede9691a6f46b796da4073ac14adJohn McCall hasAnyOverflow |= overflow; 5567d16627081caede9691a6f46b796da4073ac14adJohn McCall 5577d16627081caede9691a6f46b796da4073ac14adJohn McCall // Add in the cookie, and check whether it's overflowed. 5587d16627081caede9691a6f46b796da4073ac14adJohn McCall if (cookieSize != 0) { 5597d16627081caede9691a6f46b796da4073ac14adJohn McCall // Save the current size without a cookie. This shouldn't be 5607d16627081caede9691a6f46b796da4073ac14adJohn McCall // used if there was overflow. 5617d16627081caede9691a6f46b796da4073ac14adJohn McCall sizeWithoutCookie = llvm::ConstantInt::get(CGF.SizeTy, allocationSize); 5627d16627081caede9691a6f46b796da4073ac14adJohn McCall 5637d16627081caede9691a6f46b796da4073ac14adJohn McCall allocationSize = allocationSize.uadd_ov(cookieSize, overflow); 5647d16627081caede9691a6f46b796da4073ac14adJohn McCall hasAnyOverflow |= overflow; 5651e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 5667d16627081caede9691a6f46b796da4073ac14adJohn McCall 5677d16627081caede9691a6f46b796da4073ac14adJohn McCall // On overflow, produce a -1 so operator new will fail. 5687d16627081caede9691a6f46b796da4073ac14adJohn McCall if (hasAnyOverflow) { 5697d16627081caede9691a6f46b796da4073ac14adJohn McCall size = llvm::Constant::getAllOnesValue(CGF.SizeTy); 570806941eab5e1d62d7676e5cdc0e1d9e397ea78b4Chris Lattner } else { 5717d16627081caede9691a6f46b796da4073ac14adJohn McCall size = llvm::ConstantInt::get(CGF.SizeTy, allocationSize); 572806941eab5e1d62d7676e5cdc0e1d9e397ea78b4Chris Lattner } 5731e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 5747d16627081caede9691a6f46b796da4073ac14adJohn McCall // Otherwise, we might need to use the overflow intrinsics. 5757d16627081caede9691a6f46b796da4073ac14adJohn McCall } else { 5769203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // There are up to five conditions we need to test for: 5777d16627081caede9691a6f46b796da4073ac14adJohn McCall // 1) if isSigned, we need to check whether numElements is negative; 5787d16627081caede9691a6f46b796da4073ac14adJohn McCall // 2) if numElementsWidth > sizeWidth, we need to check whether 5797d16627081caede9691a6f46b796da4073ac14adJohn McCall // numElements is larger than something representable in size_t; 5809203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // 3) if minElements > 0, we need to check whether numElements is smaller 5819203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // than that. 5829203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // 4) we need to compute 5837d16627081caede9691a6f46b796da4073ac14adJohn McCall // sizeWithoutCookie := numElements * typeSizeMultiplier 5847d16627081caede9691a6f46b796da4073ac14adJohn McCall // and check whether it overflows; and 5859203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // 5) if we need a cookie, we need to compute 5867d16627081caede9691a6f46b796da4073ac14adJohn McCall // size := sizeWithoutCookie + cookieSize 5877d16627081caede9691a6f46b796da4073ac14adJohn McCall // and check whether it overflows. 5887d16627081caede9691a6f46b796da4073ac14adJohn McCall 5896bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *hasOverflow = nullptr; 5907d16627081caede9691a6f46b796da4073ac14adJohn McCall 5917d16627081caede9691a6f46b796da4073ac14adJohn McCall // If numElementsWidth > sizeWidth, then one way or another, we're 5927d16627081caede9691a6f46b796da4073ac14adJohn McCall // going to have to do a comparison for (2), and this happens to 5937d16627081caede9691a6f46b796da4073ac14adJohn McCall // take care of (1), too. 5947d16627081caede9691a6f46b796da4073ac14adJohn McCall if (numElementsWidth > sizeWidth) { 5957d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::APInt threshold(numElementsWidth, 1); 5967d16627081caede9691a6f46b796da4073ac14adJohn McCall threshold <<= sizeWidth; 5977d16627081caede9691a6f46b796da4073ac14adJohn McCall 5987d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *thresholdV 5997d16627081caede9691a6f46b796da4073ac14adJohn McCall = llvm::ConstantInt::get(numElementsType, threshold); 6007d16627081caede9691a6f46b796da4073ac14adJohn McCall 6017d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = CGF.Builder.CreateICmpUGE(numElements, thresholdV); 6027d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = CGF.Builder.CreateTrunc(numElements, CGF.SizeTy); 6037d16627081caede9691a6f46b796da4073ac14adJohn McCall 6047d16627081caede9691a6f46b796da4073ac14adJohn McCall // Otherwise, if we're signed, we want to sext up to size_t. 6057d16627081caede9691a6f46b796da4073ac14adJohn McCall } else if (isSigned) { 6067d16627081caede9691a6f46b796da4073ac14adJohn McCall if (numElementsWidth < sizeWidth) 6077d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = CGF.Builder.CreateSExt(numElements, CGF.SizeTy); 6087d16627081caede9691a6f46b796da4073ac14adJohn McCall 6097d16627081caede9691a6f46b796da4073ac14adJohn McCall // If there's a non-1 type size multiplier, then we can do the 6107d16627081caede9691a6f46b796da4073ac14adJohn McCall // signedness check at the same time as we do the multiply 6117d16627081caede9691a6f46b796da4073ac14adJohn McCall // because a negative number times anything will cause an 6129203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // unsigned overflow. Otherwise, we have to do it here. But at least 6139203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // in this case, we can subsume the >= minElements check. 6147d16627081caede9691a6f46b796da4073ac14adJohn McCall if (typeSizeMultiplier == 1) 6157d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = CGF.Builder.CreateICmpSLT(numElements, 6169203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl llvm::ConstantInt::get(CGF.SizeTy, minElements)); 6177d16627081caede9691a6f46b796da4073ac14adJohn McCall 6187d16627081caede9691a6f46b796da4073ac14adJohn McCall // Otherwise, zext up to size_t if necessary. 6197d16627081caede9691a6f46b796da4073ac14adJohn McCall } else if (numElementsWidth < sizeWidth) { 6207d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = CGF.Builder.CreateZExt(numElements, CGF.SizeTy); 6217d16627081caede9691a6f46b796da4073ac14adJohn McCall } 6221e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 6237d16627081caede9691a6f46b796da4073ac14adJohn McCall assert(numElements->getType() == CGF.SizeTy); 6241e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 6259203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (minElements) { 6269203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // Don't allow allocation of fewer elements than we have initializers. 6279203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (!hasOverflow) { 6289203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl hasOverflow = CGF.Builder.CreateICmpULT(numElements, 6299203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl llvm::ConstantInt::get(CGF.SizeTy, minElements)); 6309203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } else if (numElementsWidth > sizeWidth) { 6319203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // The other existing overflow subsumes this check. 6329203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // We do an unsigned comparison, since any signed value < -1 is 6339203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // taken care of either above or below. 6349203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl hasOverflow = CGF.Builder.CreateOr(hasOverflow, 6359203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl CGF.Builder.CreateICmpULT(numElements, 6369203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl llvm::ConstantInt::get(CGF.SizeTy, minElements))); 6379203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } 6389203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } 6399203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 6407d16627081caede9691a6f46b796da4073ac14adJohn McCall size = numElements; 6411e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 6427d16627081caede9691a6f46b796da4073ac14adJohn McCall // Multiply by the type size if necessary. This multiplier 6437d16627081caede9691a6f46b796da4073ac14adJohn McCall // includes all the factors for nested arrays. 6447d16627081caede9691a6f46b796da4073ac14adJohn McCall // 6457d16627081caede9691a6f46b796da4073ac14adJohn McCall // This step also causes numElements to be scaled up by the 6467d16627081caede9691a6f46b796da4073ac14adJohn McCall // nested-array factor if necessary. Overflow on this computation 6477d16627081caede9691a6f46b796da4073ac14adJohn McCall // can be ignored because the result shouldn't be used if 6487d16627081caede9691a6f46b796da4073ac14adJohn McCall // allocation fails. 6497d16627081caede9691a6f46b796da4073ac14adJohn McCall if (typeSizeMultiplier != 1) { 6507d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *umul_with_overflow 6518dd55a3c3b28d195717c87bbc60e765951d408feBenjamin Kramer = CGF.CGM.getIntrinsic(llvm::Intrinsic::umul_with_overflow, CGF.SizeTy); 6527d16627081caede9691a6f46b796da4073ac14adJohn McCall 6537d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *tsmV = 6547d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::ConstantInt::get(CGF.SizeTy, typeSizeMultiplier); 6557d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *result = 6567d16627081caede9691a6f46b796da4073ac14adJohn McCall CGF.Builder.CreateCall2(umul_with_overflow, size, tsmV); 6577d16627081caede9691a6f46b796da4073ac14adJohn McCall 6587d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *overflowed = CGF.Builder.CreateExtractValue(result, 1); 6597d16627081caede9691a6f46b796da4073ac14adJohn McCall if (hasOverflow) 6607d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = CGF.Builder.CreateOr(hasOverflow, overflowed); 6617d16627081caede9691a6f46b796da4073ac14adJohn McCall else 6627d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = overflowed; 6637d16627081caede9691a6f46b796da4073ac14adJohn McCall 6647d16627081caede9691a6f46b796da4073ac14adJohn McCall size = CGF.Builder.CreateExtractValue(result, 0); 6657d16627081caede9691a6f46b796da4073ac14adJohn McCall 6667d16627081caede9691a6f46b796da4073ac14adJohn McCall // Also scale up numElements by the array size multiplier. 6677d16627081caede9691a6f46b796da4073ac14adJohn McCall if (arraySizeMultiplier != 1) { 6687d16627081caede9691a6f46b796da4073ac14adJohn McCall // If the base element type size is 1, then we can re-use the 6697d16627081caede9691a6f46b796da4073ac14adJohn McCall // multiply we just did. 6707d16627081caede9691a6f46b796da4073ac14adJohn McCall if (typeSize.isOne()) { 6717d16627081caede9691a6f46b796da4073ac14adJohn McCall assert(arraySizeMultiplier == typeSizeMultiplier); 6727d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = size; 6737d16627081caede9691a6f46b796da4073ac14adJohn McCall 6747d16627081caede9691a6f46b796da4073ac14adJohn McCall // Otherwise we need a separate multiply. 6757d16627081caede9691a6f46b796da4073ac14adJohn McCall } else { 6767d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *asmV = 6777d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::ConstantInt::get(CGF.SizeTy, arraySizeMultiplier); 6787d16627081caede9691a6f46b796da4073ac14adJohn McCall numElements = CGF.Builder.CreateMul(numElements, asmV); 6797d16627081caede9691a6f46b796da4073ac14adJohn McCall } 6807d16627081caede9691a6f46b796da4073ac14adJohn McCall } 6817d16627081caede9691a6f46b796da4073ac14adJohn McCall } else { 6827d16627081caede9691a6f46b796da4073ac14adJohn McCall // numElements doesn't need to be scaled. 6837d16627081caede9691a6f46b796da4073ac14adJohn McCall assert(arraySizeMultiplier == 1); 6841e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 6857d16627081caede9691a6f46b796da4073ac14adJohn McCall 6867d16627081caede9691a6f46b796da4073ac14adJohn McCall // Add in the cookie size if necessary. 6877d16627081caede9691a6f46b796da4073ac14adJohn McCall if (cookieSize != 0) { 6887d16627081caede9691a6f46b796da4073ac14adJohn McCall sizeWithoutCookie = size; 6897d16627081caede9691a6f46b796da4073ac14adJohn McCall 6907d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *uadd_with_overflow 6918dd55a3c3b28d195717c87bbc60e765951d408feBenjamin Kramer = CGF.CGM.getIntrinsic(llvm::Intrinsic::uadd_with_overflow, CGF.SizeTy); 6927d16627081caede9691a6f46b796da4073ac14adJohn McCall 6937d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *cookieSizeV = llvm::ConstantInt::get(CGF.SizeTy, cookieSize); 6947d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *result = 6957d16627081caede9691a6f46b796da4073ac14adJohn McCall CGF.Builder.CreateCall2(uadd_with_overflow, size, cookieSizeV); 6967d16627081caede9691a6f46b796da4073ac14adJohn McCall 6977d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Value *overflowed = CGF.Builder.CreateExtractValue(result, 1); 6987d16627081caede9691a6f46b796da4073ac14adJohn McCall if (hasOverflow) 6997d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = CGF.Builder.CreateOr(hasOverflow, overflowed); 7007d16627081caede9691a6f46b796da4073ac14adJohn McCall else 7017d16627081caede9691a6f46b796da4073ac14adJohn McCall hasOverflow = overflowed; 7021e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 7037d16627081caede9691a6f46b796da4073ac14adJohn McCall size = CGF.Builder.CreateExtractValue(result, 0); 7041e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 7051e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 7067d16627081caede9691a6f46b796da4073ac14adJohn McCall // If we had any possibility of dynamic overflow, make a select to 7077d16627081caede9691a6f46b796da4073ac14adJohn McCall // overwrite 'size' with an all-ones value, which should cause 7087d16627081caede9691a6f46b796da4073ac14adJohn McCall // operator new to throw. 7097d16627081caede9691a6f46b796da4073ac14adJohn McCall if (hasOverflow) 7107d16627081caede9691a6f46b796da4073ac14adJohn McCall size = CGF.Builder.CreateSelect(hasOverflow, 7117d16627081caede9691a6f46b796da4073ac14adJohn McCall llvm::Constant::getAllOnesValue(CGF.SizeTy), 7127d16627081caede9691a6f46b796da4073ac14adJohn McCall size); 713806941eab5e1d62d7676e5cdc0e1d9e397ea78b4Chris Lattner } 7141e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 7157d16627081caede9691a6f46b796da4073ac14adJohn McCall if (cookieSize == 0) 7167d16627081caede9691a6f46b796da4073ac14adJohn McCall sizeWithoutCookie = size; 7171e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall else 7187d16627081caede9691a6f46b796da4073ac14adJohn McCall assert(sizeWithoutCookie && "didn't set sizeWithoutCookie?"); 7191e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 7207d16627081caede9691a6f46b796da4073ac14adJohn McCall return size; 721a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson} 722a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 7239203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redlstatic void StoreAnyExprIntoOneUnit(CodeGenFunction &CGF, const Expr *Init, 7249203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl QualType AllocType, llvm::Value *NewPtr) { 725b66a0f46ebf715835fb643d06510cd822f946c17Bill Wendling // FIXME: Refactor with EmitExprAsInit. 726d7722d9d76a851e7897f4127626616d3b1b8e530Eli Friedman CharUnits Alignment = CGF.getContext().getTypeAlignInChars(AllocType); 7279d232c884ea9872d6555df0fd7359699819bc1f1John McCall switch (CGF.getEvaluationKind(AllocType)) { 7289d232c884ea9872d6555df0fd7359699819bc1f1John McCall case TEK_Scalar: 7296bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CGF.EmitScalarInit(Init, nullptr, CGF.MakeAddrLValue(NewPtr, AllocType, 7306bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines Alignment), 731a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall false); 7329d232c884ea9872d6555df0fd7359699819bc1f1John McCall return; 7339d232c884ea9872d6555df0fd7359699819bc1f1John McCall case TEK_Complex: 7349d232c884ea9872d6555df0fd7359699819bc1f1John McCall CGF.EmitComplexExprIntoLValue(Init, CGF.MakeAddrLValue(NewPtr, AllocType, 7359d232c884ea9872d6555df0fd7359699819bc1f1John McCall Alignment), 7369d232c884ea9872d6555df0fd7359699819bc1f1John McCall /*isInit*/ true); 7379d232c884ea9872d6555df0fd7359699819bc1f1John McCall return; 7389d232c884ea9872d6555df0fd7359699819bc1f1John McCall case TEK_Aggregate: { 739558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall AggValueSlot Slot 740f394078fde147dcf27e9b6a7965517388d64dcb6Eli Friedman = AggValueSlot::forAddr(NewPtr, Alignment, AllocType.getQualifiers(), 7417c2349be2d11143a2e59a167fd43362a3bf4585eJohn McCall AggValueSlot::IsDestructed, 7424418439220a8f8e0b1deffdccce2354854c702f5John McCall AggValueSlot::DoesNotNeedGCBarriers, 743649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier AggValueSlot::IsNotAliased); 744558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall CGF.EmitAggExpr(Init, Slot); 7459d232c884ea9872d6555df0fd7359699819bc1f1John McCall return; 7469d232c884ea9872d6555df0fd7359699819bc1f1John McCall } 747558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall } 7489d232c884ea9872d6555df0fd7359699819bc1f1John McCall llvm_unreachable("bad evaluation kind"); 749ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanian} 750ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanian 751ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanianvoid 752ef8225444452a1486bd721f3285301fe84643b00Stephen HinesCodeGenFunction::EmitNewArrayInitializer(const CXXNewExpr *E, 753ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType ElementType, 754ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *BeginPtr, 755ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *NumElements, 756ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *AllocSizeWithoutCookie) { 757ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // If we have a type with trivial initialization and no initializer, 758ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // there's nothing to do. 7592aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl if (!E->hasInitializer()) 760ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return; 761197056726ed6412501130c2ef2ff69009772aa65John McCall 762ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *CurPtr = BeginPtr; 763197056726ed6412501130c2ef2ff69009772aa65John McCall 764ef8225444452a1486bd721f3285301fe84643b00Stephen Hines unsigned InitListElements = 0; 7659203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 7669203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl const Expr *Init = E->getInitializer(); 767ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::AllocaInst *EndOfInit = nullptr; 768ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType::DestructionKind DtorKind = ElementType.isDestructedType(); 769ef8225444452a1486bd721f3285301fe84643b00Stephen Hines EHScopeStack::stable_iterator Cleanup; 770ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Instruction *CleanupDominator = nullptr; 771b66a0f46ebf715835fb643d06510cd822f946c17Bill Wendling 7729203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // If the initializer is an initializer list, first do the explicit elements. 7739203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (const InitListExpr *ILE = dyn_cast<InitListExpr>(Init)) { 774ef8225444452a1486bd721f3285301fe84643b00Stephen Hines InitListElements = ILE->getNumInits(); 775577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier 776b66a0f46ebf715835fb643d06510cd822f946c17Bill Wendling // If this is a multi-dimensional array new, we will initialize multiple 777b66a0f46ebf715835fb643d06510cd822f946c17Bill Wendling // elements with each init list element. 778b66a0f46ebf715835fb643d06510cd822f946c17Bill Wendling QualType AllocType = E->getAllocatedType(); 779b66a0f46ebf715835fb643d06510cd822f946c17Bill Wendling if (const ConstantArrayType *CAT = dyn_cast_or_null<ConstantArrayType>( 780b66a0f46ebf715835fb643d06510cd822f946c17Bill Wendling AllocType->getAsArrayTypeUnsafe())) { 781ef8225444452a1486bd721f3285301fe84643b00Stephen Hines unsigned AS = CurPtr->getType()->getPointerAddressSpace(); 782b66a0f46ebf715835fb643d06510cd822f946c17Bill Wendling llvm::Type *AllocPtrTy = ConvertTypeForMem(AllocType)->getPointerTo(AS); 783ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CurPtr = Builder.CreateBitCast(CurPtr, AllocPtrTy); 784ef8225444452a1486bd721f3285301fe84643b00Stephen Hines InitListElements *= getContext().getConstantArrayElementCount(CAT); 785b66a0f46ebf715835fb643d06510cd822f946c17Bill Wendling } 786b66a0f46ebf715835fb643d06510cd822f946c17Bill Wendling 787ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Enter a partial-destruction Cleanup if necessary. 788ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (needsEHCleanup(DtorKind)) { 789ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // In principle we could tell the Cleanup where we are more 790577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // directly, but the control flow can get so varied here that it 791577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // would actually be quite complex. Therefore we go through an 792577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // alloca. 793ef8225444452a1486bd721f3285301fe84643b00Stephen Hines EndOfInit = CreateTempAlloca(BeginPtr->getType(), "array.init.end"); 794ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CleanupDominator = Builder.CreateStore(BeginPtr, EndOfInit); 795ef8225444452a1486bd721f3285301fe84643b00Stephen Hines pushIrregularPartialArrayCleanup(BeginPtr, EndOfInit, ElementType, 796ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getDestroyer(DtorKind)); 797ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Cleanup = EHStack.stable_begin(); 798577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier } 799577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier 8009203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl for (unsigned i = 0, e = ILE->getNumInits(); i != e; ++i) { 801577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // Tell the cleanup that it needs to destroy up to this 802577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // element. TODO: some of these stores can be trivially 803577fb5b2c15f7c187983a53e53f4f53b5d7aabb1Chad Rosier // observed to be unnecessary. 804ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (EndOfInit) 805ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Builder.CreateStore(Builder.CreateBitCast(CurPtr, BeginPtr->getType()), 806ef8225444452a1486bd721f3285301fe84643b00Stephen Hines EndOfInit); 807ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // FIXME: If the last initializer is an incomplete initializer list for 808ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // an array, and we have an array filler, we can fold together the two 809ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // initialization loops. 810b66a0f46ebf715835fb643d06510cd822f946c17Bill Wendling StoreAnyExprIntoOneUnit(*this, ILE->getInit(i), 811ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ILE->getInit(i)->getType(), CurPtr); 812ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CurPtr = Builder.CreateConstInBoundsGEP1_32(CurPtr, 1, "array.exp.next"); 8139203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } 8149203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 8159203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // The remaining elements are filled with the array filler expression. 8169203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl Init = ILE->getArrayFiller(); 817b66a0f46ebf715835fb643d06510cd822f946c17Bill Wendling 818ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Extract the initializer for the individual array elements by pulling 819ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // out the array filler from all the nested initializer lists. This avoids 820ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // generating a nested loop for the initialization. 821ef8225444452a1486bd721f3285301fe84643b00Stephen Hines while (Init && Init->getType()->isConstantArrayType()) { 822ef8225444452a1486bd721f3285301fe84643b00Stephen Hines auto *SubILE = dyn_cast<InitListExpr>(Init); 823ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (!SubILE) 824ef8225444452a1486bd721f3285301fe84643b00Stephen Hines break; 825ef8225444452a1486bd721f3285301fe84643b00Stephen Hines assert(SubILE->getNumInits() == 0 && "explicit inits in array filler?"); 826ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Init = SubILE->getArrayFiller(); 827ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 828ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 829ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Switch back to initializing one base element at a time. 830ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CurPtr = Builder.CreateBitCast(CurPtr, BeginPtr->getType()); 8319203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } 8329203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 833ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Attempt to perform zero-initialization using memset. 834ef8225444452a1486bd721f3285301fe84643b00Stephen Hines auto TryMemsetInitialization = [&]() -> bool { 835ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // FIXME: If the type is a pointer-to-data-member under the Itanium ABI, 836ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // we can initialize with a memset to -1. 837ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (!CGM.getTypes().isZeroInitializable(ElementType)) 838ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return false; 839ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 840ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Optimization: since zero initialization will just set the memory 841ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // to all zeroes, generate a single memset to do it in one shot. 842ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 843ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Subtract out the size of any elements we've already initialized. 844ef8225444452a1486bd721f3285301fe84643b00Stephen Hines auto *RemainingSize = AllocSizeWithoutCookie; 845ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (InitListElements) { 846ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // We know this can't overflow; we check this when doing the allocation. 847ef8225444452a1486bd721f3285301fe84643b00Stephen Hines auto *InitializedSize = llvm::ConstantInt::get( 848ef8225444452a1486bd721f3285301fe84643b00Stephen Hines RemainingSize->getType(), 849ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getContext().getTypeSizeInChars(ElementType).getQuantity() * 850ef8225444452a1486bd721f3285301fe84643b00Stephen Hines InitListElements); 851ef8225444452a1486bd721f3285301fe84643b00Stephen Hines RemainingSize = Builder.CreateSub(RemainingSize, InitializedSize); 852ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 853ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 854ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Create the memset. 855ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CharUnits Alignment = getContext().getTypeAlignInChars(ElementType); 856ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Builder.CreateMemSet(CurPtr, Builder.getInt8(0), RemainingSize, 857ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Alignment.getQuantity(), false); 858ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return true; 859ef8225444452a1486bd721f3285301fe84643b00Stephen Hines }; 8606bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 861ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // If all elements have already been initialized, skip any further 862ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // initialization. 863ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantInt *ConstNum = dyn_cast<llvm::ConstantInt>(NumElements); 864ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (ConstNum && ConstNum->getZExtValue() <= InitListElements) { 865ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // If there was a Cleanup, deactivate it. 866ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (CleanupDominator) 867ef8225444452a1486bd721f3285301fe84643b00Stephen Hines DeactivateCleanupBlock(Cleanup, CleanupDominator); 8686bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return; 8696bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines } 8706bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 871ef8225444452a1486bd721f3285301fe84643b00Stephen Hines assert(Init && "have trailing elements to initialize but no initializer"); 872ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 873ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // If this is a constructor call, try to optimize it out, and failing that 874ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // emit a single loop to initialize all remaining elements. 875ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(Init)) { 876ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CXXConstructorDecl *Ctor = CCE->getConstructor(); 877ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (Ctor->isTrivial()) { 878ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // If new expression did not specify value-initialization, then there 879ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // is no initialization. 880ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (!CCE->requiresZeroInitialization() || Ctor->getParent()->isEmpty()) 881ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return; 882ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 883ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (TryMemsetInitialization()) 884ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return; 885ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 886ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 887ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Store the new Cleanup position for irregular Cleanups. 888ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // 889ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // FIXME: Share this cleanup with the constructor call emission rather than 890ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // having it create a cleanup of its own. 891ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (EndOfInit) Builder.CreateStore(CurPtr, EndOfInit); 892ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 893ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Emit a constructor call loop to initialize the remaining elements. 894ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (InitListElements) 895ef8225444452a1486bd721f3285301fe84643b00Stephen Hines NumElements = Builder.CreateSub( 896ef8225444452a1486bd721f3285301fe84643b00Stephen Hines NumElements, 897ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantInt::get(NumElements->getType(), InitListElements)); 898ef8225444452a1486bd721f3285301fe84643b00Stephen Hines EmitCXXAggrConstructorCall(Ctor, NumElements, CurPtr, 899ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CCE->arg_begin(), CCE->arg_end(), 900ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CCE->requiresZeroInitialization()); 901ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return; 902ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 903ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 904ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // If this is value-initialization, we can usually use memset. 905ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ImplicitValueInitExpr IVIE(ElementType); 906ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (isa<ImplicitValueInitExpr>(Init)) { 907ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (TryMemsetInitialization()) 908ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return; 909ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 910ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Switch to an ImplicitValueInitExpr for the element type. This handles 911ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // only one case: multidimensional array new of pointers to members. In 912ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // all other cases, we already have an initializer for the array element. 913ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Init = &IVIE; 914ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 915ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 916ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // At this point we should have found an initializer for the individual 917ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // elements of the array. 918ef8225444452a1486bd721f3285301fe84643b00Stephen Hines assert(getContext().hasSameUnqualifiedType(ElementType, Init->getType()) && 919ef8225444452a1486bd721f3285301fe84643b00Stephen Hines "got wrong type of element to initialize"); 920ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 921ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // If we have an empty initializer list, we can usually use memset. 922ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (auto *ILE = dyn_cast<InitListExpr>(Init)) 923ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (ILE->getNumInits() == 0 && TryMemsetInitialization()) 924ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return; 925ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 926ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Create the loop blocks. 927ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::BasicBlock *EntryBB = Builder.GetInsertBlock(); 928ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::BasicBlock *LoopBB = createBasicBlock("new.loop"); 929ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::BasicBlock *ContBB = createBasicBlock("new.loop.end"); 930ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 931ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Find the end of the array, hoisted out of the loop. 932ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *EndPtr = 933ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Builder.CreateInBoundsGEP(BeginPtr, NumElements, "array.end"); 934197056726ed6412501130c2ef2ff69009772aa65John McCall 9359203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // If the number of elements isn't constant, we have to now check if there is 9369203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // anything left to initialize. 937ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (!ConstNum) { 938ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *IsEmpty = Builder.CreateICmpEQ(CurPtr, EndPtr, 939197056726ed6412501130c2ef2ff69009772aa65John McCall "array.isempty"); 940ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Builder.CreateCondBr(IsEmpty, ContBB, LoopBB); 941197056726ed6412501130c2ef2ff69009772aa65John McCall } 942197056726ed6412501130c2ef2ff69009772aa65John McCall 943197056726ed6412501130c2ef2ff69009772aa65John McCall // Enter the loop. 944ef8225444452a1486bd721f3285301fe84643b00Stephen Hines EmitBlock(LoopBB); 945197056726ed6412501130c2ef2ff69009772aa65John McCall 946197056726ed6412501130c2ef2ff69009772aa65John McCall // Set up the current-element phi. 947ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::PHINode *CurPtrPhi = 948ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Builder.CreatePHI(CurPtr->getType(), 2, "array.cur"); 949ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CurPtrPhi->addIncoming(CurPtr, EntryBB); 950ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CurPtr = CurPtrPhi; 951ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 952ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Store the new Cleanup position for irregular Cleanups. 953ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (EndOfInit) Builder.CreateStore(CurPtr, EndOfInit); 954ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 955ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Enter a partial-destruction Cleanup if necessary. 956ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (!CleanupDominator && needsEHCleanup(DtorKind)) { 957ef8225444452a1486bd721f3285301fe84643b00Stephen Hines pushRegularPartialArrayCleanup(BeginPtr, CurPtr, ElementType, 958ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getDestroyer(DtorKind)); 959ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Cleanup = EHStack.stable_begin(); 960ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CleanupDominator = Builder.CreateUnreachable(); 961197056726ed6412501130c2ef2ff69009772aa65John McCall } 962197056726ed6412501130c2ef2ff69009772aa65John McCall 963197056726ed6412501130c2ef2ff69009772aa65John McCall // Emit the initializer into this element. 964ef8225444452a1486bd721f3285301fe84643b00Stephen Hines StoreAnyExprIntoOneUnit(*this, Init, Init->getType(), CurPtr); 965197056726ed6412501130c2ef2ff69009772aa65John McCall 966ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Leave the Cleanup if we entered one. 967ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (CleanupDominator) { 968ef8225444452a1486bd721f3285301fe84643b00Stephen Hines DeactivateCleanupBlock(Cleanup, CleanupDominator); 969ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CleanupDominator->eraseFromParent(); 9706f103ba42cb69d50005a977c5ea583984ab63fc4John McCall } 971197056726ed6412501130c2ef2ff69009772aa65John McCall 972651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Advance to the next element by adjusting the pointer type as necessary. 973ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *NextPtr = 974ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Builder.CreateConstInBoundsGEP1_32(CurPtr, 1, "array.next"); 975ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 976197056726ed6412501130c2ef2ff69009772aa65John McCall // Check whether we've gotten to the end of the array and, if so, 977197056726ed6412501130c2ef2ff69009772aa65John McCall // exit the loop. 978ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *IsEnd = Builder.CreateICmpEQ(NextPtr, EndPtr, "array.atend"); 979ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Builder.CreateCondBr(IsEnd, ContBB, LoopBB); 980ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CurPtrPhi->addIncoming(NextPtr, Builder.GetInsertBlock()); 981197056726ed6412501130c2ef2ff69009772aa65John McCall 982ef8225444452a1486bd721f3285301fe84643b00Stephen Hines EmitBlock(ContBB); 983ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanian} 984ef66872797e46ced3ffdb428e582bc7f00474f99Fariborz Jahanian 985a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlssonstatic void EmitNewInitializer(CodeGenFunction &CGF, const CXXNewExpr *E, 986197056726ed6412501130c2ef2ff69009772aa65John McCall QualType ElementType, 987a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson llvm::Value *NewPtr, 98859174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor llvm::Value *NumElements, 98959174c0633fb5cde41735cfbff5744bdf837e8d9Douglas Gregor llvm::Value *AllocSizeWithoutCookie) { 990ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (E->isArray()) 991ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGF.EmitNewArrayInitializer(E, ElementType, NewPtr, NumElements, 992ef8225444452a1486bd721f3285301fe84643b00Stephen Hines AllocSizeWithoutCookie); 993ef8225444452a1486bd721f3285301fe84643b00Stephen Hines else if (const Expr *Init = E->getInitializer()) 994ef8225444452a1486bd721f3285301fe84643b00Stephen Hines StoreAnyExprIntoOneUnit(CGF, Init, E->getAllocatedType(), NewPtr); 995a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson} 996a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 997ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith/// Emit a call to an operator new or operator delete function, as implicitly 998ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith/// created by new-expressions and delete-expressions. 999ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smithstatic RValue EmitNewDeleteCall(CodeGenFunction &CGF, 1000ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith const FunctionDecl *Callee, 1001ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith const FunctionProtoType *CalleeType, 1002ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith const CallArgList &Args) { 1003ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith llvm::Instruction *CallOrInvoke; 1004060cb4a28c9d0cb15c7a9bd5de2164685629ad9cRichard Smith llvm::Value *CalleeAddr = CGF.CGM.GetAddrOfFunction(Callee); 1005ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith RValue RV = 1006ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith CGF.EmitCall(CGF.CGM.getTypes().arrangeFreeFunctionCall(Args, CalleeType), 1007060cb4a28c9d0cb15c7a9bd5de2164685629ad9cRichard Smith CalleeAddr, ReturnValueSlot(), Args, 1008ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith Callee, &CallOrInvoke); 1009ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith 1010ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith /// C++1y [expr.new]p10: 1011ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith /// [In a new-expression,] an implementation is allowed to omit a call 1012ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith /// to a replaceable global allocation function. 1013ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith /// 1014ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith /// We model such elidable calls with the 'builtin' attribute. 101587017a781f9e2d70a0478abaae26ba486f6e717eRafael Espindola llvm::Function *Fn = dyn_cast<llvm::Function>(CalleeAddr); 1016060cb4a28c9d0cb15c7a9bd5de2164685629ad9cRichard Smith if (Callee->isReplaceableGlobalAllocationFunction() && 101787017a781f9e2d70a0478abaae26ba486f6e717eRafael Espindola Fn && Fn->hasFnAttribute(llvm::Attribute::NoBuiltin)) { 1018ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith // FIXME: Add addAttribute to CallSite. 1019ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith if (llvm::CallInst *CI = dyn_cast<llvm::CallInst>(CallOrInvoke)) 1020ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith CI->addAttribute(llvm::AttributeSet::FunctionIndex, 1021ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith llvm::Attribute::Builtin); 1022ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith else if (llvm::InvokeInst *II = dyn_cast<llvm::InvokeInst>(CallOrInvoke)) 1023ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith II->addAttribute(llvm::AttributeSet::FunctionIndex, 1024ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith llvm::Attribute::Builtin); 1025ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith else 1026ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith llvm_unreachable("unexpected kind of call instruction"); 1027ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith } 1028ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith 1029ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith return RV; 1030ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith} 1031ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith 1032ef8225444452a1486bd721f3285301fe84643b00Stephen HinesRValue CodeGenFunction::EmitBuiltinNewDeleteCall(const FunctionProtoType *Type, 1033ef8225444452a1486bd721f3285301fe84643b00Stephen Hines const Expr *Arg, 1034ef8225444452a1486bd721f3285301fe84643b00Stephen Hines bool IsDelete) { 1035ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CallArgList Args; 1036ef8225444452a1486bd721f3285301fe84643b00Stephen Hines const Stmt *ArgS = Arg; 1037ef8225444452a1486bd721f3285301fe84643b00Stephen Hines EmitCallArgs(Args, *Type->param_type_begin(), 1038ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ConstExprIterator(&ArgS), ConstExprIterator(&ArgS + 1)); 1039ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Find the allocation or deallocation function that we're calling. 1040ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ASTContext &Ctx = getContext(); 1041ef8225444452a1486bd721f3285301fe84643b00Stephen Hines DeclarationName Name = Ctx.DeclarationNames 1042ef8225444452a1486bd721f3285301fe84643b00Stephen Hines .getCXXOperatorName(IsDelete ? OO_Delete : OO_New); 1043ef8225444452a1486bd721f3285301fe84643b00Stephen Hines for (auto *Decl : Ctx.getTranslationUnitDecl()->lookup(Name)) 1044ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (auto *FD = dyn_cast<FunctionDecl>(Decl)) 1045ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (Ctx.hasSameType(FD->getType(), QualType(Type, 0))) 1046ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return EmitNewDeleteCall(*this, cast<FunctionDecl>(Decl), Type, Args); 1047ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm_unreachable("predeclared global operator new/delete is missing"); 1048ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 1049ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 10507d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCallnamespace { 10517d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall /// A cleanup to call the given 'operator delete' function upon 10527d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall /// abnormal exit from a new expression. 10537d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall class CallDeleteDuringNew : public EHScopeStack::Cleanup { 10547d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall size_t NumPlacementArgs; 10557d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall const FunctionDecl *OperatorDelete; 10567d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall llvm::Value *Ptr; 10577d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall llvm::Value *AllocSize; 10587d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10597d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall RValue *getPlacementArgs() { return reinterpret_cast<RValue*>(this+1); } 10607d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10617d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall public: 10627d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall static size_t getExtraSize(size_t NumPlacementArgs) { 10637d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall return NumPlacementArgs * sizeof(RValue); 10647d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall } 10657d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10667d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall CallDeleteDuringNew(size_t NumPlacementArgs, 10677d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall const FunctionDecl *OperatorDelete, 10687d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall llvm::Value *Ptr, 10697d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall llvm::Value *AllocSize) 10707d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall : NumPlacementArgs(NumPlacementArgs), OperatorDelete(OperatorDelete), 10717d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall Ptr(Ptr), AllocSize(AllocSize) {} 10727d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10737d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall void setPlacementArg(unsigned I, RValue Arg) { 10747d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall assert(I < NumPlacementArgs && "index out of range"); 10757d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall getPlacementArgs()[I] = Arg; 10767d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall } 10777d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 1078651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines void Emit(CodeGenFunction &CGF, Flags flags) override { 10797d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall const FunctionProtoType *FPT 10807d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall = OperatorDelete->getType()->getAs<FunctionProtoType>(); 1081651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines assert(FPT->getNumParams() == NumPlacementArgs + 1 || 1082651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines (FPT->getNumParams() == 2 && NumPlacementArgs == 0)); 10837d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10847d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall CallArgList DeleteArgs; 10857d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10867d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // The first argument is always a void*. 1087651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines FunctionProtoType::param_type_iterator AI = FPT->param_type_begin(); 108804c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RValue::get(Ptr), *AI++); 10897d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10907d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // A member 'operator delete' can take an extra 'size_t' argument. 1091651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (FPT->getNumParams() == NumPlacementArgs + 2) 109204c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RValue::get(AllocSize), *AI++); 10937d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10947d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // Pass the rest of the arguments, which must match exactly. 10957d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall for (unsigned I = 0; I != NumPlacementArgs; ++I) 109604c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(getPlacementArgs()[I], *AI++); 10977d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 10987d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // Call 'operator delete'. 1099ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith EmitNewDeleteCall(CGF, OperatorDelete, FPT, DeleteArgs); 11007d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall } 11017d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall }; 11023019c444c672938c57f5573840071ecd73425ee7John McCall 11033019c444c672938c57f5573840071ecd73425ee7John McCall /// A cleanup to call the given 'operator delete' function upon 11043019c444c672938c57f5573840071ecd73425ee7John McCall /// abnormal exit from a new expression when the new expression is 11053019c444c672938c57f5573840071ecd73425ee7John McCall /// conditional. 11063019c444c672938c57f5573840071ecd73425ee7John McCall class CallDeleteDuringConditionalNew : public EHScopeStack::Cleanup { 11073019c444c672938c57f5573840071ecd73425ee7John McCall size_t NumPlacementArgs; 11083019c444c672938c57f5573840071ecd73425ee7John McCall const FunctionDecl *OperatorDelete; 1109804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type Ptr; 1110804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type AllocSize; 11113019c444c672938c57f5573840071ecd73425ee7John McCall 1112804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type *getPlacementArgs() { 1113804b807ea918184d6de63bd745e1ff75a9bfc679John McCall return reinterpret_cast<DominatingValue<RValue>::saved_type*>(this+1); 11143019c444c672938c57f5573840071ecd73425ee7John McCall } 11153019c444c672938c57f5573840071ecd73425ee7John McCall 11163019c444c672938c57f5573840071ecd73425ee7John McCall public: 11173019c444c672938c57f5573840071ecd73425ee7John McCall static size_t getExtraSize(size_t NumPlacementArgs) { 1118804b807ea918184d6de63bd745e1ff75a9bfc679John McCall return NumPlacementArgs * sizeof(DominatingValue<RValue>::saved_type); 11193019c444c672938c57f5573840071ecd73425ee7John McCall } 11203019c444c672938c57f5573840071ecd73425ee7John McCall 11213019c444c672938c57f5573840071ecd73425ee7John McCall CallDeleteDuringConditionalNew(size_t NumPlacementArgs, 11223019c444c672938c57f5573840071ecd73425ee7John McCall const FunctionDecl *OperatorDelete, 1123804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type Ptr, 1124804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type AllocSize) 11253019c444c672938c57f5573840071ecd73425ee7John McCall : NumPlacementArgs(NumPlacementArgs), OperatorDelete(OperatorDelete), 11263019c444c672938c57f5573840071ecd73425ee7John McCall Ptr(Ptr), AllocSize(AllocSize) {} 11273019c444c672938c57f5573840071ecd73425ee7John McCall 1128804b807ea918184d6de63bd745e1ff75a9bfc679John McCall void setPlacementArg(unsigned I, DominatingValue<RValue>::saved_type Arg) { 11293019c444c672938c57f5573840071ecd73425ee7John McCall assert(I < NumPlacementArgs && "index out of range"); 11303019c444c672938c57f5573840071ecd73425ee7John McCall getPlacementArgs()[I] = Arg; 11313019c444c672938c57f5573840071ecd73425ee7John McCall } 11323019c444c672938c57f5573840071ecd73425ee7John McCall 1133651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines void Emit(CodeGenFunction &CGF, Flags flags) override { 11343019c444c672938c57f5573840071ecd73425ee7John McCall const FunctionProtoType *FPT 11353019c444c672938c57f5573840071ecd73425ee7John McCall = OperatorDelete->getType()->getAs<FunctionProtoType>(); 1136651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines assert(FPT->getNumParams() == NumPlacementArgs + 1 || 1137651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines (FPT->getNumParams() == 2 && NumPlacementArgs == 0)); 11383019c444c672938c57f5573840071ecd73425ee7John McCall 11393019c444c672938c57f5573840071ecd73425ee7John McCall CallArgList DeleteArgs; 11403019c444c672938c57f5573840071ecd73425ee7John McCall 11413019c444c672938c57f5573840071ecd73425ee7John McCall // The first argument is always a void*. 1142651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines FunctionProtoType::param_type_iterator AI = FPT->param_type_begin(); 114304c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(Ptr.restore(CGF), *AI++); 11443019c444c672938c57f5573840071ecd73425ee7John McCall 11453019c444c672938c57f5573840071ecd73425ee7John McCall // A member 'operator delete' can take an extra 'size_t' argument. 1146651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (FPT->getNumParams() == NumPlacementArgs + 2) { 1147804b807ea918184d6de63bd745e1ff75a9bfc679John McCall RValue RV = AllocSize.restore(CGF); 114804c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RV, *AI++); 11493019c444c672938c57f5573840071ecd73425ee7John McCall } 11503019c444c672938c57f5573840071ecd73425ee7John McCall 11513019c444c672938c57f5573840071ecd73425ee7John McCall // Pass the rest of the arguments, which must match exactly. 11523019c444c672938c57f5573840071ecd73425ee7John McCall for (unsigned I = 0; I != NumPlacementArgs; ++I) { 1153804b807ea918184d6de63bd745e1ff75a9bfc679John McCall RValue RV = getPlacementArgs()[I].restore(CGF); 115404c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RV, *AI++); 11553019c444c672938c57f5573840071ecd73425ee7John McCall } 11563019c444c672938c57f5573840071ecd73425ee7John McCall 11573019c444c672938c57f5573840071ecd73425ee7John McCall // Call 'operator delete'. 1158ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith EmitNewDeleteCall(CGF, OperatorDelete, FPT, DeleteArgs); 11593019c444c672938c57f5573840071ecd73425ee7John McCall } 11603019c444c672938c57f5573840071ecd73425ee7John McCall }; 11613019c444c672938c57f5573840071ecd73425ee7John McCall} 11623019c444c672938c57f5573840071ecd73425ee7John McCall 11633019c444c672938c57f5573840071ecd73425ee7John McCall/// Enter a cleanup to call 'operator delete' if the initializer in a 11643019c444c672938c57f5573840071ecd73425ee7John McCall/// new-expression throws. 11653019c444c672938c57f5573840071ecd73425ee7John McCallstatic void EnterNewDeleteCleanup(CodeGenFunction &CGF, 11663019c444c672938c57f5573840071ecd73425ee7John McCall const CXXNewExpr *E, 11673019c444c672938c57f5573840071ecd73425ee7John McCall llvm::Value *NewPtr, 11683019c444c672938c57f5573840071ecd73425ee7John McCall llvm::Value *AllocSize, 11693019c444c672938c57f5573840071ecd73425ee7John McCall const CallArgList &NewArgs) { 11703019c444c672938c57f5573840071ecd73425ee7John McCall // If we're not inside a conditional branch, then the cleanup will 11713019c444c672938c57f5573840071ecd73425ee7John McCall // dominate and we can do the easier (and more efficient) thing. 11723019c444c672938c57f5573840071ecd73425ee7John McCall if (!CGF.isInConditionalBranch()) { 11733019c444c672938c57f5573840071ecd73425ee7John McCall CallDeleteDuringNew *Cleanup = CGF.EHStack 11743019c444c672938c57f5573840071ecd73425ee7John McCall .pushCleanupWithExtra<CallDeleteDuringNew>(EHCleanup, 11753019c444c672938c57f5573840071ecd73425ee7John McCall E->getNumPlacementArgs(), 11763019c444c672938c57f5573840071ecd73425ee7John McCall E->getOperatorDelete(), 11773019c444c672938c57f5573840071ecd73425ee7John McCall NewPtr, AllocSize); 11783019c444c672938c57f5573840071ecd73425ee7John McCall for (unsigned I = 0, N = E->getNumPlacementArgs(); I != N; ++I) 1179c6d07821c529bb95e4cf072e49b736c5142f1786Eli Friedman Cleanup->setPlacementArg(I, NewArgs[I+1].RV); 11803019c444c672938c57f5573840071ecd73425ee7John McCall 11813019c444c672938c57f5573840071ecd73425ee7John McCall return; 11823019c444c672938c57f5573840071ecd73425ee7John McCall } 11833019c444c672938c57f5573840071ecd73425ee7John McCall 11843019c444c672938c57f5573840071ecd73425ee7John McCall // Otherwise, we need to save all this stuff. 1185804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type SavedNewPtr = 1186804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::save(CGF, RValue::get(NewPtr)); 1187804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::saved_type SavedAllocSize = 1188804b807ea918184d6de63bd745e1ff75a9bfc679John McCall DominatingValue<RValue>::save(CGF, RValue::get(AllocSize)); 11893019c444c672938c57f5573840071ecd73425ee7John McCall 11903019c444c672938c57f5573840071ecd73425ee7John McCall CallDeleteDuringConditionalNew *Cleanup = CGF.EHStack 11916f103ba42cb69d50005a977c5ea583984ab63fc4John McCall .pushCleanupWithExtra<CallDeleteDuringConditionalNew>(EHCleanup, 11923019c444c672938c57f5573840071ecd73425ee7John McCall E->getNumPlacementArgs(), 11933019c444c672938c57f5573840071ecd73425ee7John McCall E->getOperatorDelete(), 11943019c444c672938c57f5573840071ecd73425ee7John McCall SavedNewPtr, 11953019c444c672938c57f5573840071ecd73425ee7John McCall SavedAllocSize); 11963019c444c672938c57f5573840071ecd73425ee7John McCall for (unsigned I = 0, N = E->getNumPlacementArgs(); I != N; ++I) 1197804b807ea918184d6de63bd745e1ff75a9bfc679John McCall Cleanup->setPlacementArg(I, 1198c6d07821c529bb95e4cf072e49b736c5142f1786Eli Friedman DominatingValue<RValue>::save(CGF, NewArgs[I+1].RV)); 11993019c444c672938c57f5573840071ecd73425ee7John McCall 12006f103ba42cb69d50005a977c5ea583984ab63fc4John McCall CGF.initFullExprCleanup(); 12017d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall} 12027d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 120316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlssonllvm::Value *CodeGenFunction::EmitCXXNewExpr(const CXXNewExpr *E) { 1204c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // The element type being allocated. 1205c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall QualType allocType = getContext().getBaseElementType(E->getAllocatedType()); 12061e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1207c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // 1. Build a call to the allocation function. 1208c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall FunctionDecl *allocator = E->getOperatorNew(); 1209c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall const FunctionProtoType *allocatorType = 1210c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall allocator->getType()->castAs<FunctionProtoType>(); 121116d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1212c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall CallArgList allocatorArgs; 121316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 121416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // The allocation size is the first argument. 1215c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall QualType sizeType = getContext().getSizeType(); 121616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 12179203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl // If there is a brace-initializer, cannot allocate fewer elements than inits. 12189203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl unsigned minElements = 0; 12199203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (E->isArray() && E->hasInitializer()) { 12209203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl if (const InitListExpr *ILE = dyn_cast<InitListExpr>(E->getInitializer())) 12219203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl minElements = ILE->getNumInits(); 12229203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl } 12239203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl 12246bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *numElements = nullptr; 12256bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *allocSizeWithoutCookie = nullptr; 1226c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::Value *allocSize = 12279203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl EmitCXXNewAllocSize(*this, E, minElements, numElements, 12289203647221439c6eb04842bb8a22f5f03fd4d2bfSebastian Redl allocSizeWithoutCookie); 1229a4d4c019bf477ce6ff7b01517e690f6c5fd6ad71Anders Carlsson 123004c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman allocatorArgs.add(RValue::get(allocSize), sizeType); 123116d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 123216d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // We start at 1 here because the first argument (the allocation size) 123316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // has already been emitted. 1234651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines EmitCallArgs(allocatorArgs, allocatorType->isVariadic(), 1235651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines allocatorType->param_type_begin() + 1, 1236651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines allocatorType->param_type_end(), E->placement_arg_begin(), 1237651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines E->placement_arg_end()); 123816d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1239b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // Emit the allocation call. If the allocator is a global placement 1240b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // operator, just "inline" it directly. 1241b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall RValue RV; 1242b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall if (allocator->isReservedGlobalPlacementOperator()) { 1243b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall assert(allocatorArgs.size() == 2); 1244b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall RV = allocatorArgs[1].RV; 1245b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // TODO: kill any unnecessary computations done for the size 1246b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall // argument. 1247b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall } else { 1248ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith RV = EmitNewDeleteCall(*this, allocator, allocatorType, allocatorArgs); 1249b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall } 125016d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1251c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // Emit a null check on the allocation result if the allocation 1252c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // function is allowed to return null (because it has a non-throwing 1253c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // exception spec; for this part, we inline 1254c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // CXXNewExpr::shouldNullCheckAllocation()) and we have an 1255c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall // interesting initializer. 12568026f6d82f7fa544bc0453714fe94bca62a1196eSebastian Redl bool nullCheck = allocatorType->isNothrow(getContext()) && 12572aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl (!allocType.isPODType(getContext()) || E->hasInitializer()); 125816d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 12596bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::BasicBlock *nullCheckBB = nullptr; 12606bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::BasicBlock *contBB = nullptr; 126116d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1262c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::Value *allocation = RV.getScalarVal(); 1263956a5a17713deb1b5b27893303c4f308a1bd2a62Micah Villmow unsigned AS = allocation->getType()->getPointerAddressSpace(); 126416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1265a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall // The null-check means that the initializer is conditionally 1266a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall // evaluated. 1267a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall ConditionalEvaluation conditional(*this); 1268a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall 1269c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall if (nullCheck) { 1270c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall conditional.begin(*this); 127116d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1272c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall nullCheckBB = Builder.GetInsertBlock(); 1273c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::BasicBlock *notNullBB = createBasicBlock("new.notnull"); 1274c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall contBB = createBasicBlock("new.cont"); 1275a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall 1276c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::Value *isNull = Builder.CreateIsNull(allocation, "new.isnull"); 1277c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall Builder.CreateCondBr(isNull, contBB, notNullBB); 1278c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall EmitBlock(notNullBB); 127916d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson } 12801e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 12817d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // If there's an operator delete, enter a cleanup to call it if an 12827d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // exception is thrown. 1283c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall EHScopeStack::stable_iterator operatorDeleteCleanup; 12846bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Instruction *cleanupDominator = nullptr; 1285b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall if (E->getOperatorDelete() && 1286b1c98a35fbd49d6404a72db4aca2ceda352380c7John McCall !E->getOperatorDelete()->isReservedGlobalPlacementOperator()) { 1287c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall EnterNewDeleteCleanup(*this, E, allocation, allocSize, allocatorArgs); 1288c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall operatorDeleteCleanup = EHStack.stable_begin(); 12896f103ba42cb69d50005a977c5ea583984ab63fc4John McCall cleanupDominator = Builder.CreateUnreachable(); 12907d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall } 12917d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 1292576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman assert((allocSize == allocSizeWithoutCookie) == 1293576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman CalculateCookiePadding(*this, E).isZero()); 1294576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman if (allocSize != allocSizeWithoutCookie) { 1295576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman assert(E->isArray()); 1296576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman allocation = CGM.getCXXABI().InitializeArrayCookie(*this, allocation, 1297576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman numElements, 1298576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman E, allocType); 1299576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman } 1300576cf17055c92e7d1ae8fb9fd9f79433a16a4394Eli Friedman 13012acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *elementPtrTy 1302c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall = ConvertTypeForMem(allocType)->getPointerTo(AS); 1303c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::Value *result = Builder.CreateBitCast(allocation, elementPtrTy); 13047d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 1305197056726ed6412501130c2ef2ff69009772aa65John McCall EmitNewInitializer(*this, E, allocType, result, numElements, 1306197056726ed6412501130c2ef2ff69009772aa65John McCall allocSizeWithoutCookie); 13071e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (E->isArray()) { 13081e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // NewPtr is a pointer to the base element type. If we're 13091e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // allocating an array of arrays, we'll need to cast back to the 13101e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // array pointer type. 13112acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *resultType = ConvertTypeForMem(E->getType()); 1312c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall if (result->getType() != resultType) 1313c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall result = Builder.CreateBitCast(result, resultType); 1314ceb43b662bf09b44a08714e8f9d222780ca979d7Fariborz Jahanian } 13157d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall 13167d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // Deactivate the 'operator delete' cleanup if we finished 13177d8647f194ae4f2499e5bcd40dcfea34cd21ebc6John McCall // initialization. 13186f103ba42cb69d50005a977c5ea583984ab63fc4John McCall if (operatorDeleteCleanup.isValid()) { 13196f103ba42cb69d50005a977c5ea583984ab63fc4John McCall DeactivateCleanupBlock(operatorDeleteCleanup, cleanupDominator); 13206f103ba42cb69d50005a977c5ea583984ab63fc4John McCall cleanupDominator->eraseFromParent(); 13216f103ba42cb69d50005a977c5ea583984ab63fc4John McCall } 13222aed8b88613863f3c439cdfb205bdf8b608fb205Sebastian Redl 1323c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall if (nullCheck) { 1324a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall conditional.end(*this); 1325a7f633f522af786e80dc08dbd63e222c9414095bJohn McCall 1326c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall llvm::BasicBlock *notNullBB = Builder.GetInsertBlock(); 1327c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall EmitBlock(contBB); 132816d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1329bbf3bacb3e0c1ebb3e8a4a8b1330404a7e379315Jay Foad llvm::PHINode *PHI = Builder.CreatePHI(result->getType(), 2); 1330c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall PHI->addIncoming(result, notNullBB); 1331c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall PHI->addIncoming(llvm::Constant::getNullValue(result->getType()), 1332c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall nullCheckBB); 133316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1334c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall result = PHI; 133516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson } 13361e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1337c2f3e7f42c8bf9e8d4393a6e8c4762dafc4f28ddJohn McCall return result; 133816d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson} 133916d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 13405fe05986473c4ff780508dec4cd2cf4822168125Eli Friedmanvoid CodeGenFunction::EmitDeleteCall(const FunctionDecl *DeleteFD, 13415fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman llvm::Value *Ptr, 13425fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman QualType DeleteTy) { 13431e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall assert(DeleteFD->getOverloadedOperator() == OO_Delete); 13441e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 13455fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman const FunctionProtoType *DeleteFTy = 13465fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman DeleteFD->getType()->getAs<FunctionProtoType>(); 13475fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman 13485fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman CallArgList DeleteArgs; 13495fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman 1350871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson // Check if we need to pass the size to the delete operator. 13516bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *Size = nullptr; 1352871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson QualType SizeTy; 1353651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (DeleteFTy->getNumParams() == 2) { 1354651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines SizeTy = DeleteFTy->getParamType(1); 13554f122ef0ca7683486d78c84ed87455d5f35ee1b1Ken Dyck CharUnits DeleteTypeSize = getContext().getTypeSizeInChars(DeleteTy); 13564f122ef0ca7683486d78c84ed87455d5f35ee1b1Ken Dyck Size = llvm::ConstantInt::get(ConvertType(SizeTy), 13574f122ef0ca7683486d78c84ed87455d5f35ee1b1Ken Dyck DeleteTypeSize.getQuantity()); 1358871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson } 1359651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1360651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines QualType ArgTy = DeleteFTy->getParamType(0); 1361871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson llvm::Value *DeletePtr = Builder.CreateBitCast(Ptr, ConvertType(ArgTy)); 136204c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RValue::get(DeletePtr), ArgTy); 1363871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson 1364871d078f5ae5505553c02deeabdd4b83b4820211Anders Carlsson if (Size) 136504c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman DeleteArgs.add(RValue::get(Size), SizeTy); 13665fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman 13675fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman // Emit the call to delete. 1368ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith EmitNewDeleteCall(*this, DeleteFD, DeleteFTy, DeleteArgs); 13695fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman} 13705fe05986473c4ff780508dec4cd2cf4822168125Eli Friedman 13711e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCallnamespace { 13721e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall /// Calls the given 'operator delete' on a single object. 13731e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall struct CallObjectDelete : EHScopeStack::Cleanup { 13741e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *Ptr; 13751e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionDecl *OperatorDelete; 13761e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType ElementType; 13771e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 13781e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CallObjectDelete(llvm::Value *Ptr, 13791e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionDecl *OperatorDelete, 13801e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType ElementType) 13811e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall : Ptr(Ptr), OperatorDelete(OperatorDelete), ElementType(ElementType) {} 13821e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1383651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines void Emit(CodeGenFunction &CGF, Flags flags) override { 13841e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.EmitDeleteCall(OperatorDelete, Ptr, ElementType); 13851e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 13861e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall }; 13871e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall} 13881e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 13891e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall/// Emit the code for deleting a single object. 13901e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCallstatic void EmitObjectDelete(CodeGenFunction &CGF, 13911e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionDecl *OperatorDelete, 13921e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *Ptr, 1393a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor QualType ElementType, 1394a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor bool UseGlobalDelete) { 13951e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Find the destructor for the type, if applicable. If the 13961e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // destructor is virtual, we'll just emit the vcall and return. 13976bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines const CXXDestructorDecl *Dtor = nullptr; 13981e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (const RecordType *RT = ElementType->getAs<RecordType>()) { 13991e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 1400aebab72698ce5283395e61597a266fb04e62e390Eli Friedman if (RD->hasDefinition() && !RD->hasTrivialDestructor()) { 14011e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall Dtor = RD->getDestructor(); 14021e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14031e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (Dtor->isVirtual()) { 1404a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor if (UseGlobalDelete) { 1405a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor // If we're supposed to call the global delete, make sure we do so 1406a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor // even if the destructor throws. 1407ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall 1408ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall // Derive the complete-object pointer, which is what we need 1409ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall // to pass to the deallocation function. 1410ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall llvm::Value *completePtr = 1411ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall CGF.CGM.getCXXABI().adjustToCompleteObject(CGF, Ptr, ElementType); 1412ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall 1413a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor CGF.EHStack.pushCleanup<CallObjectDelete>(NormalAndEHCleanup, 1414ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall completePtr, OperatorDelete, 1415a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor ElementType); 1416a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor } 14170f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov 14184def70d3040e73707c738f7c366737a986135edfRichard Smith // FIXME: Provide a source location here. 14190f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov CXXDtorType DtorType = UseGlobalDelete ? Dtor_Complete : Dtor_Deleting; 14200f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov CGF.CGM.getCXXABI().EmitVirtualDestructorCall(CGF, Dtor, DtorType, 14213b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin SourceLocation(), Ptr); 14221e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1423a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor if (UseGlobalDelete) { 1424a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor CGF.PopCleanupBlock(); 1425a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor } 1426a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor 14271e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall return; 14281e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 14291e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 14301e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 14311e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14321e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Make sure that we call delete even if the dtor throws. 14333ad32c8d93eb65d1d4943d7df567fc9b4f55d137John McCall // This doesn't have to a conditional cleanup because we're going 14343ad32c8d93eb65d1d4943d7df567fc9b4f55d137John McCall // to pop it off in a second. 14351e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.EHStack.pushCleanup<CallObjectDelete>(NormalAndEHCleanup, 14361e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall Ptr, OperatorDelete, ElementType); 14371e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14381e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (Dtor) 14391e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.EmitCXXDestructorCall(Dtor, Dtor_Complete, 1440378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor /*ForVirtualBase=*/false, 1441378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor /*Delegating=*/false, 1442378e1e739aed97e9b278beeb20e9f5bbe34c0232Douglas Gregor Ptr); 14434e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie else if (CGF.getLangOpts().ObjCAutoRefCount && 1444f85e193739c953358c865005855253af4f68a497John McCall ElementType->isObjCLifetimeType()) { 1445f85e193739c953358c865005855253af4f68a497John McCall switch (ElementType.getObjCLifetime()) { 1446f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_None: 1447f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_ExplicitNone: 1448f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_Autoreleasing: 1449f85e193739c953358c865005855253af4f68a497John McCall break; 14501e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1451f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_Strong: { 1452f85e193739c953358c865005855253af4f68a497John McCall // Load the pointer value. 1453f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *PtrValue = CGF.Builder.CreateLoad(Ptr, 1454f85e193739c953358c865005855253af4f68a497John McCall ElementType.isVolatileQualified()); 1455f85e193739c953358c865005855253af4f68a497John McCall 14565b07e8077a20b80fee90bd76c43c6150c676e4a8John McCall CGF.EmitARCRelease(PtrValue, ARCPreciseLifetime); 1457f85e193739c953358c865005855253af4f68a497John McCall break; 1458f85e193739c953358c865005855253af4f68a497John McCall } 1459f85e193739c953358c865005855253af4f68a497John McCall 1460f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_Weak: 1461f85e193739c953358c865005855253af4f68a497John McCall CGF.EmitARCDestroyWeak(Ptr); 1462f85e193739c953358c865005855253af4f68a497John McCall break; 1463f85e193739c953358c865005855253af4f68a497John McCall } 1464f85e193739c953358c865005855253af4f68a497John McCall } 1465f85e193739c953358c865005855253af4f68a497John McCall 14661e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.PopCleanupBlock(); 14671e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall} 14681e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14691e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCallnamespace { 14701e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall /// Calls the given 'operator delete' on an array of objects. 14711e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall struct CallArrayDelete : EHScopeStack::Cleanup { 14721e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *Ptr; 14731e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionDecl *OperatorDelete; 14741e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *NumElements; 14751e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType ElementType; 14761e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CharUnits CookieSize; 14771e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14781e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CallArrayDelete(llvm::Value *Ptr, 14791e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionDecl *OperatorDelete, 14801e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *NumElements, 14811e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType ElementType, 14821e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CharUnits CookieSize) 14831e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall : Ptr(Ptr), OperatorDelete(OperatorDelete), NumElements(NumElements), 14841e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall ElementType(ElementType), CookieSize(CookieSize) {} 14851e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 1486651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines void Emit(CodeGenFunction &CGF, Flags flags) override { 14871e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall const FunctionProtoType *DeleteFTy = 14881e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall OperatorDelete->getType()->getAs<FunctionProtoType>(); 1489651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines assert(DeleteFTy->getNumParams() == 1 || DeleteFTy->getNumParams() == 2); 14901e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14911e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CallArgList Args; 14921e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14931e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Pass the pointer as the first argument. 1494651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines QualType VoidPtrTy = DeleteFTy->getParamType(0); 14951e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *DeletePtr 14961e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall = CGF.Builder.CreateBitCast(Ptr, CGF.ConvertType(VoidPtrTy)); 149704c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman Args.add(RValue::get(DeletePtr), VoidPtrTy); 14981e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 14991e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Pass the original requested size as the second argument. 1500651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (DeleteFTy->getNumParams() == 2) { 1501651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines QualType size_t = DeleteFTy->getParamType(1); 15022acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::IntegerType *SizeTy 15031e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall = cast<llvm::IntegerType>(CGF.ConvertType(size_t)); 15041e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15051e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CharUnits ElementTypeSize = 15061e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.CGM.getContext().getTypeSizeInChars(ElementType); 15071e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15081e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // The size of an element, multiplied by the number of elements. 15091e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *Size 15101e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall = llvm::ConstantInt::get(SizeTy, ElementTypeSize.getQuantity()); 15111e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall Size = CGF.Builder.CreateMul(Size, NumElements); 15121e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15131e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Plus the size of the cookie if applicable. 15141e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (!CookieSize.isZero()) { 15151e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *CookieSizeV 15161e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall = llvm::ConstantInt::get(SizeTy, CookieSize.getQuantity()); 15171e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall Size = CGF.Builder.CreateAdd(Size, CookieSizeV); 15181e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 15191e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 152004c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman Args.add(RValue::get(Size), size_t); 15211e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 15221e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15231e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Emit the call to delete. 1524ddcff1b310b80b63f1a9ba88f2befeab40c3648fRichard Smith EmitNewDeleteCall(CGF, OperatorDelete, DeleteFTy, Args); 15251e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 15261e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall }; 15271e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall} 15281e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15291e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall/// Emit the code for deleting an array of objects. 15301e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCallstatic void EmitArrayDelete(CodeGenFunction &CGF, 15316ec278d1a354517e20f13a877481453ee7940c78John McCall const CXXDeleteExpr *E, 15327cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall llvm::Value *deletedPtr, 15337cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall QualType elementType) { 15346bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *numElements = nullptr; 15356bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *allocatedPtr = nullptr; 15367cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CharUnits cookieSize; 15377cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CGF.CGM.getCXXABI().ReadArrayCookie(CGF, deletedPtr, E, elementType, 15387cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall numElements, allocatedPtr, cookieSize); 15391e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15407cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall assert(allocatedPtr && "ReadArrayCookie didn't set allocated pointer"); 15411e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15421e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // Make sure that we call delete even if one of the dtors throws. 15437cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall const FunctionDecl *operatorDelete = E->getOperatorDelete(); 15441e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.EHStack.pushCleanup<CallArrayDelete>(NormalAndEHCleanup, 15457cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall allocatedPtr, operatorDelete, 15467cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall numElements, elementType, 15477cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall cookieSize); 15487cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall 15497cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall // Destroy the elements. 15507cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall if (QualType::DestructionKind dtorKind = elementType.isDestructedType()) { 15517cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall assert(numElements && "no element count for a type with a destructor!"); 15527cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall 15537cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall llvm::Value *arrayEnd = 15547cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CGF.Builder.CreateInBoundsGEP(deletedPtr, numElements, "delete.end"); 1555fbf780a9d1dbb191fc40c8af967c590e08724b74John McCall 1556fbf780a9d1dbb191fc40c8af967c590e08724b74John McCall // Note that it is legal to allocate a zero-length array, and we 1557fbf780a9d1dbb191fc40c8af967c590e08724b74John McCall // can never fold the check away because the length should always 1558fbf780a9d1dbb191fc40c8af967c590e08724b74John McCall // come from a cookie. 15597cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CGF.emitArrayDestroy(deletedPtr, arrayEnd, elementType, 15607cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CGF.getDestroyer(dtorKind), 1561fbf780a9d1dbb191fc40c8af967c590e08724b74John McCall /*checkZeroLength*/ true, 15627cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall CGF.needsEHCleanup(dtorKind)); 15631e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 15641e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15657cfd76cb5cec2aa7aaa4176339c806de6ec85a79John McCall // Pop the cleanup block. 15661e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall CGF.PopCleanupBlock(); 15671e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall} 15681e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 156916d81b8db39593b5f1a38b077757272a09c12da8Anders Carlssonvoid CodeGenFunction::EmitCXXDeleteExpr(const CXXDeleteExpr *E) { 15709091656e423f2354e53b2b3baa95b3eb5510badcDouglas Gregor const Expr *Arg = E->getArgument(); 15719091656e423f2354e53b2b3baa95b3eb5510badcDouglas Gregor llvm::Value *Ptr = EmitScalarExpr(Arg); 157216d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 157316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson // Null check the pointer. 157416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson llvm::BasicBlock *DeleteNotNull = createBasicBlock("delete.notnull"); 157516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson llvm::BasicBlock *DeleteEnd = createBasicBlock("delete.end"); 157616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1577b924124316becf2968a37dab36d0c48ea167666fAnders Carlsson llvm::Value *IsNull = Builder.CreateIsNull(Ptr, "isnull"); 157816d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 157916d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson Builder.CreateCondBr(IsNull, DeleteEnd, DeleteNotNull); 158016d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson EmitBlock(DeleteNotNull); 15811e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15821e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // We might be deleting a pointer to array. If so, GEP down to the 15831e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // first non-array element. 15841e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // (this assumes that A(*)[3][7] is converted to [3 x [7 x %A]]*) 15851e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall QualType DeleteTy = Arg->getType()->getAs<PointerType>()->getPointeeType(); 15861e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (DeleteTy->isConstantArrayType()) { 15871e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall llvm::Value *Zero = Builder.getInt32(0); 15885f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Value*,8> GEP; 15891e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15901e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall GEP.push_back(Zero); // point at the outermost array 15911e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15921e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // For each layer of array type we're pointing at: 15931e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall while (const ConstantArrayType *Arr 15941e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall = getContext().getAsConstantArrayType(DeleteTy)) { 15951e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // 1. Unpeel the array type. 15961e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall DeleteTy = Arr->getElementType(); 15971e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 15981e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall // 2. GEP to the first element of the array. 15991e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall GEP.push_back(Zero); 160016d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson } 16011e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 16020f6ac7cf7bc6a02c1a5c19d2c90ec0d1dd7786e7Jay Foad Ptr = Builder.CreateInBoundsGEP(Ptr, GEP, "del.first"); 160316d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson } 160416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 1605eede61a83e90f3cb03ef8665b67d648dccd6ce42Douglas Gregor assert(ConvertTypeForMem(DeleteTy) == 1606eede61a83e90f3cb03ef8665b67d648dccd6ce42Douglas Gregor cast<llvm::PointerType>(Ptr->getType())->getElementType()); 16071e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall 16081e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall if (E->isArrayForm()) { 16096ec278d1a354517e20f13a877481453ee7940c78John McCall EmitArrayDelete(*this, E, Ptr, DeleteTy); 16101e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } else { 1611a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor EmitObjectDelete(*this, E->getOperatorDelete(), Ptr, DeleteTy, 1612a8b20f70d562cdc2679f82d409832b79fc415277Douglas Gregor E->isGlobalDelete()); 16131e7fe751466ea82665fd21e9162fd7cc9c5f412dJohn McCall } 161416d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson 161516d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson EmitBlock(DeleteEnd); 161616d81b8db39593b5f1a38b077757272a09c12da8Anders Carlsson} 1617c2e84ae9a6d25cea3e583c768e576b4c981ec028Mike Stump 1618ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesstatic llvm::Value *EmitTypeidFromVTable(CodeGenFunction &CGF, const Expr *E, 16192acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *StdTypeInfoPtrTy) { 16203f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // Get the vtable pointer. 16213f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson llvm::Value *ThisPtr = CGF.EmitLValue(E).getAddress(); 16223f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16233f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // C++ [expr.typeid]p2: 16243f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // If the glvalue expression is obtained by applying the unary * operator to 16253f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // a pointer and the pointer is a null pointer value, the typeid expression 16263f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // throws the std::bad_typeid exception. 1627ef8225444452a1486bd721f3285301fe84643b00Stephen Hines bool IsDeref = false; 1628ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E->IgnoreParens())) 1629ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (UO->getOpcode() == UO_Deref) 1630ef8225444452a1486bd721f3285301fe84643b00Stephen Hines IsDeref = true; 1631ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 1632ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType SrcRecordTy = E->getType(); 1633ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (CGF.CGM.getCXXABI().shouldTypeidBeNullChecked(IsDeref, SrcRecordTy)) { 1634ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::BasicBlock *BadTypeidBlock = 16353f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson CGF.createBasicBlock("typeid.bad_typeid"); 1636ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::BasicBlock *EndBlock = CGF.createBasicBlock("typeid.end"); 16373f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 1638ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *IsNull = CGF.Builder.CreateIsNull(ThisPtr); 1639ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGF.Builder.CreateCondBr(IsNull, BadTypeidBlock, EndBlock); 16403f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 1641ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGF.EmitBlock(BadTypeidBlock); 1642ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGF.CGM.getCXXABI().EmitBadTypeidCall(CGF); 1643ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGF.EmitBlock(EndBlock); 16443f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson } 16453f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 1646ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return CGF.CGM.getCXXABI().EmitTypeid(CGF, SrcRecordTy, ThisPtr, 1647ef8225444452a1486bd721f3285301fe84643b00Stephen Hines StdTypeInfoPtrTy); 16483f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson} 16493f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16503ad32c8d93eb65d1d4943d7df567fc9b4f55d137John McCallllvm::Value *CodeGenFunction::EmitCXXTypeidExpr(const CXXTypeidExpr *E) { 16512acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *StdTypeInfoPtrTy = 16523f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson ConvertType(E->getType())->getPointerTo(); 165331b7f52d8c8d459e80d2a72176cc7fcc4b7d8d38Anders Carlsson 16541d7088d1d9dc99e5478c0184a3e21cafef2a0b53Anders Carlsson if (E->isTypeOperand()) { 1655fe16aa31fdfaad4c38aed443d853af293714f1c4David Majnemer llvm::Constant *TypeInfo = 1656fe16aa31fdfaad4c38aed443d853af293714f1c4David Majnemer CGM.GetAddrOfRTTIDescriptor(E->getTypeOperand(getContext())); 16573f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson return Builder.CreateBitCast(TypeInfo, StdTypeInfoPtrTy); 16581d7088d1d9dc99e5478c0184a3e21cafef2a0b53Anders Carlsson } 16594bdbc0cb1e29ac870b7e7985cf4a1b5c34176e8cAnders Carlsson 16603f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // C++ [expr.typeid]p2: 16613f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // When typeid is applied to a glvalue expression whose type is a 16623f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // polymorphic class type, the result refers to a std::type_info object 16633f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // representing the type of the most derived object (that is, the dynamic 16643f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson // type) to which the glvalue refers. 16650d729105ecb50a7e3cbe6e57c29149edfa5cf05aRichard Smith if (E->isPotentiallyEvaluated()) 16660d729105ecb50a7e3cbe6e57c29149edfa5cf05aRichard Smith return EmitTypeidFromVTable(*this, E->getExprOperand(), 16670d729105ecb50a7e3cbe6e57c29149edfa5cf05aRichard Smith StdTypeInfoPtrTy); 16683f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson 16693f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson QualType OperandTy = E->getExprOperand()->getType(); 16703f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson return Builder.CreateBitCast(CGM.GetAddrOfRTTIDescriptor(OperandTy), 16713f6c5e13f6c1662a7173c747fc63f4e8edb91206Anders Carlsson StdTypeInfoPtrTy); 1672c2e84ae9a6d25cea3e583c768e576b4c981ec028Mike Stump} 1673c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 16743ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlssonstatic llvm::Value *EmitDynamicCastToNull(CodeGenFunction &CGF, 16753ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson QualType DestTy) { 16762acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *DestLTy = CGF.ConvertType(DestTy); 16773ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson if (DestTy->isPointerType()) 16783ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson return llvm::Constant::getNullValue(DestLTy); 16793ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 16803ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson /// C++ [expr.dynamic.cast]p9: 16813ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson /// A failed cast to reference type throws std::bad_cast 1682ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (!CGF.CGM.getCXXABI().EmitBadCastCall(CGF)) 1683ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return nullptr; 16843ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 16853ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson CGF.EmitBlock(CGF.createBasicBlock("dynamic_cast.end")); 16863ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson return llvm::UndefValue::get(DestLTy); 16873ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson} 16883ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 1689f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlssonllvm::Value *CodeGenFunction::EmitDynamicCast(llvm::Value *Value, 1690f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson const CXXDynamicCastExpr *DCE) { 1691f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson QualType DestTy = DCE->getTypeAsWritten(); 1692c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 16933ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson if (DCE->isAlwaysNull()) 1694ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (llvm::Value *T = EmitDynamicCastToNull(*this, DestTy)) 1695ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return T; 16963ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 16973ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson QualType SrcTy = DCE->getSubExpr()->getType(); 16983ddcdd5d6c88902d24baa9e6bb240a3da88e68d4Anders Carlsson 1699ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // C++ [expr.dynamic.cast]p7: 1700ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // If T is "pointer to cv void," then the result is a pointer to the most 1701ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // derived object pointed to by v. 1702ef8225444452a1486bd721f3285301fe84643b00Stephen Hines const PointerType *DestPTy = DestTy->getAs<PointerType>(); 1703ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 1704ef8225444452a1486bd721f3285301fe84643b00Stephen Hines bool isDynamicCastToVoid; 1705ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType SrcRecordTy; 1706ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType DestRecordTy; 1707ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (DestPTy) { 1708ef8225444452a1486bd721f3285301fe84643b00Stephen Hines isDynamicCastToVoid = DestPTy->getPointeeType()->isVoidType(); 1709ef8225444452a1486bd721f3285301fe84643b00Stephen Hines SrcRecordTy = SrcTy->castAs<PointerType>()->getPointeeType(); 1710ef8225444452a1486bd721f3285301fe84643b00Stephen Hines DestRecordTy = DestPTy->getPointeeType(); 1711ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } else { 1712ef8225444452a1486bd721f3285301fe84643b00Stephen Hines isDynamicCastToVoid = false; 1713ef8225444452a1486bd721f3285301fe84643b00Stephen Hines SrcRecordTy = SrcTy; 1714ef8225444452a1486bd721f3285301fe84643b00Stephen Hines DestRecordTy = DestTy->castAs<ReferenceType>()->getPointeeType(); 1715ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 1716ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 1717ef8225444452a1486bd721f3285301fe84643b00Stephen Hines assert(SrcRecordTy->isRecordType() && "source type must be a record type!"); 1718ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 1719f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // C++ [expr.dynamic.cast]p4: 1720f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // If the value of v is a null pointer value in the pointer case, the result 1721f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson // is the null pointer value of type T. 1722ef8225444452a1486bd721f3285301fe84643b00Stephen Hines bool ShouldNullCheckSrcValue = 1723ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.getCXXABI().shouldDynamicCastCallBeNullChecked(SrcTy->isPointerType(), 1724ef8225444452a1486bd721f3285301fe84643b00Stephen Hines SrcRecordTy); 17256bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 17266bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::BasicBlock *CastNull = nullptr; 17276bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::BasicBlock *CastNotNull = nullptr; 1728f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::BasicBlock *CastEnd = createBasicBlock("dynamic_cast.end"); 1729f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1730f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (ShouldNullCheckSrcValue) { 1731f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CastNull = createBasicBlock("dynamic_cast.null"); 1732f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson CastNotNull = createBasicBlock("dynamic_cast.notnull"); 1733c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 1734f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::Value *IsNull = Builder.CreateIsNull(Value); 1735f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson Builder.CreateCondBr(IsNull, CastNull, CastNotNull); 1736f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson EmitBlock(CastNotNull); 1737c849c052d6b4b70f2651c1969531861a5f230053Mike Stump } 1738f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1739ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (isDynamicCastToVoid) { 1740ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Value = CGM.getCXXABI().EmitDynamicCastToVoid(*this, Value, SrcRecordTy, 1741ef8225444452a1486bd721f3285301fe84643b00Stephen Hines DestTy); 1742ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } else { 1743ef8225444452a1486bd721f3285301fe84643b00Stephen Hines assert(DestRecordTy->isRecordType() && 1744ef8225444452a1486bd721f3285301fe84643b00Stephen Hines "destination type must be a record type!"); 1745ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Value = CGM.getCXXABI().EmitDynamicCastCall(*this, Value, SrcRecordTy, 1746ef8225444452a1486bd721f3285301fe84643b00Stephen Hines DestTy, DestRecordTy, CastEnd); 1747ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 1748f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1749f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (ShouldNullCheckSrcValue) { 1750f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson EmitBranch(CastEnd); 1751f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1752f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson EmitBlock(CastNull); 1753f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson EmitBranch(CastEnd); 1754c849c052d6b4b70f2651c1969531861a5f230053Mike Stump } 1755f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1756f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson EmitBlock(CastEnd); 1757f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1758f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson if (ShouldNullCheckSrcValue) { 1759f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson llvm::PHINode *PHI = Builder.CreatePHI(Value->getType(), 2); 1760f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson PHI->addIncoming(Value, CastNotNull); 1761f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson PHI->addIncoming(llvm::Constant::getNullValue(Value->getType()), CastNull); 1762f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson 1763f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson Value = PHI; 1764c849c052d6b4b70f2651c1969531861a5f230053Mike Stump } 1765c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 1766f0cb4a6ac7ffcba25309a5d1ad1a4bf869b13a33Anders Carlsson return Value; 1767c849c052d6b4b70f2651c1969531861a5f230053Mike Stump} 17684c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman 17694c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedmanvoid CodeGenFunction::EmitLambdaExpr(const LambdaExpr *E, AggValueSlot Slot) { 1770f8823e7ae00d2b0a9395b51b7bd53b505df72031Eli Friedman RunCleanupsScope Scope(*this); 1771377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman LValue SlotLV = MakeAddrLValue(Slot.getAddr(), E->getType(), 1772377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman Slot.getAlignment()); 1773f8823e7ae00d2b0a9395b51b7bd53b505df72031Eli Friedman 17744c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman CXXRecordDecl::field_iterator CurField = E->getLambdaClass()->field_begin(); 17754c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman for (LambdaExpr::capture_init_iterator i = E->capture_init_begin(), 17764c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman e = E->capture_init_end(); 1777c07b18ed2b207b17cf8d770966e5c1e52d46f4ecEric Christopher i != e; ++i, ++CurField) { 17784c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman // Emit initialization 1779377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman 1780581deb3da481053c4993c7600f97acf7768caac5David Blaikie LValue LV = EmitLValueForFieldInitialization(SlotLV, *CurField); 1781b74ed087469db042325bad76fdf3ff6ed67dec09Eli Friedman ArrayRef<VarDecl *> ArrayIndexes; 1782b74ed087469db042325bad76fdf3ff6ed67dec09Eli Friedman if (CurField->getType()->isArrayType()) 1783b74ed087469db042325bad76fdf3ff6ed67dec09Eli Friedman ArrayIndexes = E->getCaptureInitIndexVars(i); 1784581deb3da481053c4993c7600f97acf7768caac5David Blaikie EmitInitializerForField(*CurField, LV, *i, ArrayIndexes); 17854c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman } 17864c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman} 1787