AMDGPU: Add test for generic builtin behavior

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@266383 91177308-0d34-0410-b5e6-96231b3b80d8

Author: arsenm

test/CodeGenOpenCL/builtins-generic-amdgcn.cl

@@ -0,0 +1,16 @@
+// REQUIRES: amdgpu-registered-target
+// RUN: %clang_cc1 -triple amdgcn-unknown-unknown -S -emit-llvm -o - %s | FileCheck %s
+
+// CHECK-LABEL: @test_builtin_clz(
+// CHECK: tail call i32 @llvm.ctlz.i32(i32 %a, i1 true)
+void test_builtin_clz(global int* out, int a)
+{
+  *out = __builtin_clz(a);
+}
+
+// CHECK-LABEL: @test_builtin_clzl(
+// CHECK: tail call i64 @llvm.ctlz.i64(i64 %a, i1 true)
+void test_builtin_clzl(global long* out, long a)
+{
+  *out = __builtin_clzl(a);
+}