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

[Justin Bogner via llvm-commits]

================
@@ -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++))
----------------
bogner wrote:

I was mostly commenting on the jump from "math builtin" to "matrix type" as far as naming goes, but I don't spend a lot of time in Sema. My point is that I think we may still want some check here, I'm just not sure what without looking at it in more detail.

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