test for float5 error

Author: spall

clang/test/SemaHLSL/BuiltIns/clamp-errors.hlsl

@@ -40,6 +40,14 @@ float3 test_thing(float3 p0, float2 p1) {
   // expected-error@-1 {{cannot initialize return object of type 'float3' (aka 'vector<float, 3>') with an rvalue of type 'vector<float, 2>' (vector of 2 'float' values)}}
 }
 
+typedef float float5 __attribute__((ext_vector_type(5)));
+
+// check vectors of wrong size are rejected
+float5 vec_too_big(float5 p0) {
+  return clamp(p0, p0, p0);
+  // expected-error@-1 {{call to 'clamp' is ambiguous}}
+}
+
 float2 test_clamp_vector_size_mismatch(float3 p0, float2 p1) {
   return clamp(p0, p0, p1);
   // expected-warning@-1 {{implicit conversion truncates vector: 'float3' (aka 'vector<float, 3>') to 'vector<float, 2>' (vector of 2 'float' values)}}