Disable devirtualization when we have covariant returns. I will open a bug
for tracking this.
llvm-svn: 159351
diff --git a/clang/test/CodeGenCXX/devirtualize-virtual-function-calls-final.cpp b/clang/test/CodeGenCXX/devirtualize-virtual-function-calls-final.cpp
index d1deb77..634bf84 100644
--- a/clang/test/CodeGenCXX/devirtualize-virtual-function-calls-final.cpp
+++ b/clang/test/CodeGenCXX/devirtualize-virtual-function-calls-final.cpp
@@ -152,3 +152,37 @@
return static_cast<B*>(c)->foo();
}
}
+
+namespace Test9 {
+ struct A {
+ int a;
+ };
+ struct B {
+ int b;
+ };
+ struct C : public B, public A {
+ };
+ struct RA {
+ virtual A *f() {
+ return 0;
+ }
+ };
+ struct RC final : public RA {
+ virtual C *f() {
+ C *x = new C();
+ x->a = 1;
+ x->b = 2;
+ return x;
+ }
+ };
+ // CHECK: define {{.*}} @_ZN5Test91fEPNS_2RCE
+ A *f(RC *x) {
+ // FIXME: It should be possible to devirtualize this case, but that is
+ // not implemented yet.
+ // CHECK: getelementptr
+ // CHECK-NEXT: %[[FUNC:.*]] = load
+ // CHECK-NEXT: bitcast
+ // CHECK-NEXT: = call {{.*}} %[[FUNC]]
+ return static_cast<RA*>(x)->f();
+ }
+}