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Fix for PR5707: make sure implicit copy constructors initialize the vtable 

pointer.

llvm-svn: 90840
This commit is contained in:
Eli Friedman 2009-12-08 06:46:18 +00:00
parent 897bc03305
commit bb5008a32a
3 changed files with 15 additions and 0 deletions
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6
clang/lib/CodeGen/CGCXX.cpp
View File

@ -1572,6 +1572,8 @@ CodeGenFunction::SynthesizeCXXCopyConstructor(const CXXConstructorDecl *Ctor,
EmitAggregateCopy(LHS.getAddress(), RHS.getAddress(), Field->getType());
}
}
InitializeVtablePtrs(ClassDecl);
FinishFunction();
}
@ -1812,6 +1814,10 @@ void CodeGenFunction::EmitCtorPrologue(const CXXConstructorDecl *CD,
PopCXXTemporary();
}
InitializeVtablePtr(ClassDecl);
}
void CodeGenFunction::InitializeVtablePtrs(const CXXRecordDecl *ClassDecl) {
if (!ClassDecl->isDynamicClass())
return;

2
clang/lib/CodeGen/CodeGenFunction.h
View File

@ -468,6 +468,8 @@ public:
void EmitCtorPrologue(const CXXConstructorDecl *CD, CXXCtorType Type);
void InitializeVtablePtrs(const CXXRecordDecl *ClassDecl);
void SynthesizeCXXCopyConstructor(const CXXConstructorDecl *Ctor,
CXXCtorType Type,
llvm::Function *Fn,

7
clang/test/CodeGenCXX/copy-constructor-synthesis-2.cpp Normal file
View File

@ -0,0 +1,7 @@
// RUN: clang-cc -emit-llvm -o - %s | FileCheck %s
struct A { virtual void a(); };
A x(A& y) { return y; }
// CHECK: define linkonce_odr void @_ZN1AC1ERKS_(
// CHECK: store i8** getelementptr inbounds ([3 x i8*]* @_ZTV1A, i64 0, i64 2)