Form a CallExpr from __noop without parens

MSVC accepts __noop without any trailing parens and treats it like a
literal zero.  We don't treat __noop as an integer literal, but now at
least we can parse a naked __noop expression.

Reviewers: rsmith

Differential Revision: http://reviews.llvm.org/D4476

llvm-svn: 212860

1 files changed, 22 insertions, 5 deletions

diff --git a/clang/test/CodeGen/builtin-ms-noop.cpp b/clang/test/CodeGen/builtin-ms-noop.cpp
index f5064fbf3c0..76c6c139d00 100644
--- a/clang/test/CodeGen/builtin-ms-noop.cpp
+++ b/clang/test/CodeGen/builtin-ms-noop.cpp
@@ -1,13 +1,30 @@
-// RUN: %clang_cc1 -fms-extensions -triple %itanium_abi_triple -emit-llvm %s -o - | FileCheck %s
+// RUN: %clang_cc1 -fms-extensions -triple x86_64-unknown-unknown -emit-llvm %s -o - | FileCheck %s
 
-class A {
- public:
+struct A {
   ~A() {}
 };
 
-int f() {
-// CHECK: @_Z1fv
+extern "C" int f() {
+// CHECK: define i32 @f()
 // CHECK-NOT: call void @_ZN1AD1Ev
 // CHECK: ret i32 0
   return __noop(A());
 };
+
+extern "C" int g() {
+  return __noop;
+// CHECK: define i32 @g()
+// CHECK: ret i32 0
+}
+
+extern "C" int h() {
+  return (__noop);
+// CHECK: define i32 @h()
+// CHECK: ret i32 0
+}
+
+extern "C" int i() {
+  return __noop + 1;
+// CHECK: define i32 @i()
+// CHECK: ret i32 1
+}