[polly] [Polly] Narrow IV to lower type when possible (PR #212708)

[via llvm-commits]

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@@ -464,6 +464,25 @@ static bool hasLoopCarriedDependence(isl::ast_node_for For, const Scop &S) {
   return false;
 }
 
+static Value *adjustToType(IRBuilderBase &Builder, Value *V, Type *Ty) {
+  if (V->getType() == Ty)
+    return V;
+  if (V->getType()->getIntegerBitWidth() < Ty->getIntegerBitWidth())
+    return Builder.CreateSExt(V, Ty);
+  return Builder.CreateTrunc(V, Ty);
+}
+
+// Returns true when V is known to fit in IntPtrTy without data loss.
+// Accepts i64 constants such as 0 and 1 that ISL materialises as i64 even on
+// 32-bit targets.
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anilkund wrote:

Done

https://github.com/llvm/llvm-project/pull/212708