[clang] [clang] Restrict use of scalar types in vector builtins (PR #119423)

[Fraser Cormack via cfe-commits]

================
@@ -6,7 +6,7 @@
 // CHECK: %conv2 = fptrunc double %hlsl.dot to float
 // CHECK: ret float %conv2
 float builtin_bool_to_float_type_promotion ( float p0, bool p1 ) {
-  return __builtin_hlsl_dot ( p0, p1 );
+  return __builtin_hlsl_dot ( (double)p0, (double)p1 );
----------------
frasercrmck wrote:

@farzonl I've quickly hacked this in place to satisfy the tests. The HLSL builtins use the same Sema APIs as the ones I'm interested in changing. Is the old behaviour something that needs preserved?

https://github.com/llvm/llvm-project/pull/119423