addring test comments

Author: joaosaffran-zz

clang/test/CodeGenHLSL/builtins/clip.hlsl

@@ -1,5 +1,5 @@
-// RUN: %clang_cc1 -finclude-default-header -x hlsl -triple dxil-pc-shadermodel6.3-pixel %s -fnative-half-type -emit-llvm -o - | FileCheck %s
-// RUN: %clang_cc1 -finclude-default-header -x hlsl -triple spirv-vulkan-pixel %s -fnative-half-type -emit-llvm -o - | FileCheck %s --check-prefix=SPIRV
+// RUN: %clang_cc1 -finclude-default-header -triple dxil-pc-shadermodel6.3-pixel %s -fnative-half-type -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 -finclude-default-header -triple spirv-vulkan-pixel %s -fnative-half-type -emit-llvm -o - | FileCheck %s --check-prefix=SPIRV
 
 
 void test_scalar(float Buf) {

llvm/lib/Target/DirectX/DXIL.td

@@ -776,7 +776,6 @@ def Discard : DXILOp<82, discard> {
   let arguments = [Int1Ty];
   let result = VoidTy;
   let stages = [Stages<DXIL1_0, [pixel]>];
-  let attributes = [Attributes<DXIL1_0, [ReadNone]>];
 }
 
 def ThreadId :  DXILOp<93, threadId> {

llvm/test/CodeGen/DirectX/clip.ll renamed to llvm/test/CodeGen/DirectX/discard.ll

@@ -0,0 +1,12 @@
+; RUN: not opt -S -dxil-op-lower -mtriple=dxil-pc-shadermodel6.3-library %s 2>&1 | FileCheck %s
+
+; DXIL operation discard does not support no bool overload type
+
+; CHECK: invalid intrinsic signature
+; CHECK: call void @llvm.dx.discard(double %p)
+;
+define void @discard_double(double noundef %p) {
+entry:
+  call void @llvm.dx.discard(double %p)
+  ret void
+}