Emit an lvalue dynamic_cast even if the result is not used. Another
part (or possibly all) of PR7132.
llvm-svn: 103810
diff --git a/clang/lib/CodeGen/CGExprAgg.cpp b/clang/lib/CodeGen/CGExprAgg.cpp
index ce9ad48..5a1516c 100644
--- a/clang/lib/CodeGen/CGExprAgg.cpp
+++ b/clang/lib/CodeGen/CGExprAgg.cpp
@@ -178,7 +178,7 @@
//===----------------------------------------------------------------------===//
void AggExprEmitter::VisitCastExpr(CastExpr *E) {
- if (!DestPtr) {
+ if (!DestPtr && E->getCastKind() != CastExpr::CK_Dynamic) {
Visit(E->getSubExpr());
return;
}
@@ -186,6 +186,20 @@
switch (E->getCastKind()) {
default: assert(0 && "Unhandled cast kind!");
+ case CastExpr::CK_Dynamic: {
+ assert(isa<CXXDynamicCastExpr>(E) && "CK_Dynamic without a dynamic_cast?");
+ LValue LV = CGF.EmitCheckedLValue(E->getSubExpr());
+ // FIXME: Do we also need to handle property references here?
+ if (LV.isSimple())
+ CGF.EmitDynamicCast(LV.getAddress(), cast<CXXDynamicCastExpr>(E));
+ else
+ CGF.CGM.ErrorUnsupported(E, "non-simple lvalue dynamic_cast");
+
+ if (DestPtr)
+ CGF.CGM.ErrorUnsupported(E, "lvalue dynamic_cast with a destination");
+ break;
+ }
+
case CastExpr::CK_ToUnion: {
// GCC union extension
QualType PtrTy =