[clang] [llvm] [HLSL] implement `mad` intrinsic (PR #83826)

[Farzon Lotfi via cfe-commits]

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@@ -19812,11 +19821,13 @@ bool Sema::SemaBuiltinElementwiseTernaryMath(CallExpr *TheCall) {
     Args[I] = Converted.get();
   }
 
-  int ArgOrdinal = 1;
-  for (Expr *Arg : Args) {
-    if (checkFPMathBuiltinElementType(*this, Arg->getBeginLoc(), Arg->getType(),
-                                      ArgOrdinal++))
-      return true;
+  if (enforceFloatingPointCheck) {
+    int ArgOrdinal = 1;
+    for (Expr *Arg : Args) {
+      if (checkFPMathBuiltinElementType(*this, Arg->getBeginLoc(),
+                                        Arg->getType(), ArgOrdinal++))
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farzonl wrote:

The impact is it just changed the error when we use bool

Before change:
`// expected-error at -1 {{arguments are of different types ('double' vs 'bool')}}`
After change:
`// expected-error at -1 {{3rd argument must be a vector, integer or floating point type (was 'bool')}}`

https://github.com/llvm/llvm-project/pull/83826