[clang] [llvm] [HLSL][DXIL][SPIRV] QuadReadAcrossX intrinsic support (PR #184360)

[Steven Perron via cfe-commits]

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@@ -4069,6 +4069,20 @@ bool SemaHLSL::CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
     TheCall->setType(ArgTyExpr);
     break;
   }
+  case Builtin::BI__builtin_hlsl_quad_read_across_x: {
+    if (SemaRef.checkArgCount(TheCall, 1))
+      return true;
+
+    // Ensure input expr type is a scalar/vector and the same as the return type
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s-perron wrote:

This comment is a little confusing because you check the type for the input, but set the return type. I think the code speaks for itself, and this comment can be removed.

https://github.com/llvm/llvm-project/pull/184360