[llvm] [LV] Restrict widest induction type to be IntegerType (NFC) (PR #128173)

[Florian Hahn via llvm-commits]

================
@@ -395,24 +395,25 @@ static bool isUniformLoopNest(Loop *Lp, Loop *OuterLp) {
   return true;
 }
 
-static Type *convertPointerToIntegerType(const DataLayout &DL, Type *Ty) {
+static IntegerType *getInductionIntegerTy(const DataLayout &DL, Type *Ty) {
+  assert(Ty->isIntOrPtrTy() && "Expected integer or pointer type");
+
   if (Ty->isPointerTy())
-    return DL.getIntPtrType(Ty);
+    return DL.getIntPtrType(Ty->getContext(), Ty->getPointerAddressSpace());
 
   // It is possible that char's or short's overflow when we ask for the loop's
   // trip count, work around this by changing the type size.
   if (Ty->getScalarSizeInBits() < 32)
     return Type::getInt32Ty(Ty->getContext());
 
-  return Ty;
+  return cast<IntegerType>(Ty);
 }
 
-static Type *getWiderType(const DataLayout &DL, Type *Ty0, Type *Ty1) {
-  Ty0 = convertPointerToIntegerType(DL, Ty0);
-  Ty1 = convertPointerToIntegerType(DL, Ty1);
-  if (Ty0->getScalarSizeInBits() > Ty1->getScalarSizeInBits())
-    return Ty0;
-  return Ty1;
+static IntegerType *getWiderInductionTy(const DataLayout &DL, Type *Ty0,
+                                        Type *Ty1) {
+  IntegerType *TyA = getInductionIntegerTy(DL, Ty0);
+  IntegerType *TyB = getInductionIntegerTy(DL, Ty1);
+  return (TyA->getScalarSizeInBits() > TyB->getScalarSizeInBits()) ? TyA : TyB;
----------------
fhahn wrote:

() may not be needed

```suggestion
  return TyA->getScalarSizeInBits() > TyB->getScalarSizeInBits(  ? TyA : TyB;
```

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