Add a test for devirtualization of virtual operator calls.

There was no test coverage for this before: Modifiying
EmitCXXOperatorMemberCallee() to not call CanDevirtualizeMemberFunctionCall()
didn't make any test fail.

llvm-svn: 223056

1 files changed, 6 insertions, 3 deletions

diff --git a/clang/test/CodeGenCXX/virtual-operator-call.cpp b/clang/test/CodeGenCXX/virtual-operator-call.cpp
index 72d49c23009..727c8e140fd 100644
--- a/clang/test/CodeGenCXX/virtual-operator-call.cpp
+++ b/clang/test/CodeGenCXX/virtual-operator-call.cpp
@@ -1,10 +1,13 @@
 // RUN: %clang_cc1 %s -triple i386-unknown-unknown -emit-llvm -o - | FileCheck %s
 
 struct A {
-  virtual int operator-() = 0;
+  virtual int operator-();
 };
 
-void f(A *a) {
+void f(A a, A *ap) {
+  // CHECK: call i32 @_ZN1AngEv(%struct.A* %a)
+  -a;
+
   // CHECK: call i32 %
-  -*a;
+  -*ap;
 }