[llvm] [LV] Narrow type of WidestIndTy (NFC) (PR #128173)

[David Sherwood via llvm-commits]

================
@@ -693,11 +694,11 @@ void LoopVectorizationLegality::addInductionPhi(
   const DataLayout &DL = Phi->getDataLayout();
 
   // Get the widest type.
-  if (!PhiTy->isFloatingPointTy()) {
+  if (PhiTy->isIntOrPtrTy()) {
----------------
david-arm wrote:

Looks like the original code was potentially also accepting structs, aggregates and arrays, etc. However, I can only assume that these would be rejected by LoopVectorizationLegality somewhere so I suppose that still makes it NFC.

https://github.com/llvm/llvm-project/pull/128173