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If we're generating code to create a pointer-to-member function 

aggregate and the result of the aggregate is unused, bail out
early. Fixes PR7027.

llvm-svn: 102942
This commit is contained in:
Douglas Gregor 2010-05-03 20:00:27 +00:00
parent 937a5b75f9
commit aee1f51485
2 changed files with 12 additions and 0 deletions
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6
clang/lib/CodeGen/CGExprAgg.cpp
View File

@ -321,6 +321,11 @@ void AggExprEmitter::VisitUnaryAddrOf(const UnaryOperator *E) {
(void) MPT;
assert(MPT->getPointeeType()->isFunctionProtoType() &&
"Unexpected member pointer type!");
// The creation of member function pointers has no side effects; if
// there is no destination pointer, we have nothing to do.
if (!DestPtr)
return;
const DeclRefExpr *DRE = cast<DeclRefExpr>(E->getSubExpr());
const CXXMethodDecl *MD =
@ -329,6 +334,7 @@ void AggExprEmitter::VisitUnaryAddrOf(const UnaryOperator *E) {
const llvm::Type *PtrDiffTy =
CGF.ConvertType(CGF.getContext().getPointerDiffType());
llvm::Value *DstPtr = Builder.CreateStructGEP(DestPtr, 0, "dst.ptr");
llvm::Value *FuncPtr;

6
clang/test/CodeGenCXX/member-function-pointers.cpp
View File

@ -184,3 +184,9 @@ namespace PR6258 {
void (A::*pf)(bool) = &A::f;
}
}
// PR7027
namespace PR7027 {
struct X { void test( ); };
void testX() { &X::test; }
}