Added fmod Sema error checks

Author: kmpeng

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

@@ -0,0 +1,33 @@
+// RUN: %clang_cc1 -finclude-default-header -x hlsl -triple dxil-pc-shadermodel6.6-library %s -fnative-half-type -emit-llvm-only -disable-llvm-passes -verify
+
+float test_no_second_arg(float2 p0) {
+  return fmod(p0);
+  // expected-error@-1 {{no matching function for call to 'fmod'}}
+  // expected-note@hlsl/hlsl_intrinsics.h:* {{candidate function not viable: requires 2 arguments, but 1 was provided}}
+  // expected-note@hlsl/hlsl_intrinsics.h:* {{candidate function not viable: requires 2 arguments, but 1 was provided}}
+  // expected-note@hlsl/hlsl_intrinsics.h:* {{candidate function template not viable: requires 2 arguments, but 1 was provided}}
+  // expected-note@hlsl/hlsl_intrinsics.h:* {{candidate function template not viable: requires 2 arguments, but 1 was provided}}
+}
+
+float test_too_many_arg(float2 p0) {
+  return fmod(p0, p0, p0);
+  // expected-error@-1 {{no matching function for call to 'fmod'}}
+  // expected-note@hlsl/hlsl_intrinsics.h:* {{candidate function not viable: requires 2 arguments, but 3 were provided}}
+  // expected-note@hlsl/hlsl_intrinsics.h:* {{candidate function not viable: requires 2 arguments, but 3 were provided}}
+  // expected-note@hlsl/hlsl_intrinsics.h:* {{candidate function template not viable: requires 2 arguments, but 3 were provided}}
+  // expected-note@hlsl/hlsl_intrinsics.h:* {{candidate function template not viable: requires 2 arguments, but 3 were provided}}
+}
+
+float test_double_inputs(double p0, double p1) {
+  return fmod(p0, p1);
+  // expected-error@-1  {{call to 'fmod' is ambiguous}}
+  // expected-note@hlsl/hlsl_intrinsics.h:* {{candidate function}}
+  // expected-note@hlsl/hlsl_intrinsics.h:* {{candidate function}}
+}
+
+float test_int_inputs(int p0, int p1) {
+  return fmod(p0, p1);
+  // expected-error@-1  {{call to 'fmod' is ambiguous}}
+  // expected-note@hlsl/hlsl_intrinsics.h:* {{candidate function}}
+  // expected-note@hlsl/hlsl_intrinsics.h:* {{candidate function}}
+}