[llvm] [VPlan] Make canonical IV part of the region (PR #156262)

via llvm-commits llvm-commits at lists.llvm.org
Thu Oct 2 00:48:02 PDT 2025


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@@ -440,14 +447,9 @@ static void addCanonicalIVRecipes(VPlan &Plan, VPBasicBlock *HeaderVPBB,
   }
 
   VPBuilder Builder(LatchVPBB);
-  // Add a VPInstruction to increment the scalar canonical IV by VF * UF.
-  // Initially the induction increment is guaranteed to not wrap, but that may
-  // change later, e.g. when tail-folding, when the flags need to be dropped.
-  auto *CanonicalIVIncrement = Builder.createOverflowingOp(
+  auto CanonicalIVIncrement = Builder.createOverflowingOp(
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ayalz wrote:

Dropping * needed?

https://github.com/llvm/llvm-project/pull/156262


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