[clang] [Clang] Add elementwise maximumnum/minimumnum builtin functions (PR #149775)

[Erich Keane via cfe-commits]

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@@ -4108,6 +4108,22 @@ RValue CodeGenFunction::EmitBuiltinExpr(const GlobalDecl GD, unsigned BuiltinID,
     return RValue::get(Result);
   }
 
+  case Builtin::BI__builtin_elementwise_maximumnum: {
+    Value *Op0 = EmitScalarExpr(E->getArg(0));
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erichkeane wrote:

Ah, I stopped chasing down the call-stack 1 too few :)  I see it now in `Sema::BuiltinVectorMath(`.

I was pointing out that we refer to `[1]` (the second element), but the Prototype in Builtins.td is a `...` which allows 0 or 1 arguments.

https://github.com/llvm/llvm-project/pull/149775