[clang] [llvm] [HLSL] Implementation of dot intrinsic (PR #81190)

[Chris B via cfe-commits]

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@@ -0,0 +1,110 @@
+// RUN: %clang_cc1 -finclude-default-header -triple dxil-pc-shadermodel6.6-library %s -fnative-half-type -emit-llvm -disable-llvm-passes -verify -verify-ignore-unexpected
+
+float test_no_second_arg ( float2 p0) {
+  return __builtin_hlsl_dot ( p0 );
+  // expected-error at -1 {{too few arguments to function call, expected 2, have 1}}
+}
+
+float test_too_many_arg ( float2 p0) {
+  return __builtin_hlsl_dot ( p0, p0, p0 );
+  // expected-error at -1 {{too many arguments to function call, expected 2, have 3}}
+}
+
+//NOTE: eventually behavior should match builtin
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llvm-beanz wrote:

I’m not sure this comment is accurate.

https://github.com/llvm/llvm-project/pull/81190