[llvm] [VPlan] Relax type of DerivedIV start value (NFC) (PR #206464)

[Ramkumar Ramachandra via llvm-commits]

https://github.com/artagnon created https://github.com/llvm/llvm-project/pull/206464

Change it from VPIRValue -> VPValue, as several usecases require it.

>From 8fbee39fa5d876a040e16d8cf97ca9fdf3df0717 Mon Sep 17 00:00:00 2001
From: Ramkumar Ramachandra <artagnon at tenstorrent.com>
Date: Mon, 29 Jun 2026 12:20:47 +0100
Subject: [PATCH] [VPlan] Relax type of DerivedIV start value (NFC)

Change it from VPIRValue -> VPValue, as several usecases require it.
---
 llvm/lib/Transforms/Vectorize/LoopVectorizationPlanner.h | 2 +-
 llvm/lib/Transforms/Vectorize/VPlan.h                    | 8 ++++----
 llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp        | 2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorizationPlanner.h b/llvm/lib/Transforms/Vectorize/LoopVectorizationPlanner.h
index b39ffdebf6179..f2d8ca09fd94e 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorizationPlanner.h
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorizationPlanner.h
@@ -408,7 +408,7 @@ class VPBuilder {
   /// induction with \p Start and \p Step values, using \p Start + \p Current *
   /// \p Step.
   VPDerivedIVRecipe *createDerivedIV(InductionDescriptor::InductionKind Kind,
-                                     FPMathOperator *FPBinOp, VPIRValue *Start,
+                                     FPMathOperator *FPBinOp, VPValue *Start,
                                      VPValue *Current, VPValue *Step) {
     return tryInsertInstruction(
         new VPDerivedIVRecipe(Kind, FPBinOp, Start, Current, Step));
diff --git a/llvm/lib/Transforms/Vectorize/VPlan.h b/llvm/lib/Transforms/Vectorize/VPlan.h
index c043be05c6bd1..3f5149d95875b 100644
--- a/llvm/lib/Transforms/Vectorize/VPlan.h
+++ b/llvm/lib/Transforms/Vectorize/VPlan.h
@@ -4180,7 +4180,7 @@ class VPDerivedIVRecipe : public VPSingleDefRecipe {
   const FPMathOperator *FPBinOp;
 
 public:
-  VPDerivedIVRecipe(const InductionDescriptor &IndDesc, VPIRValue *Start,
+  VPDerivedIVRecipe(const InductionDescriptor &IndDesc, VPValue *Start,
                     VPValue *CanonicalIV, VPValue *Step)
       : VPDerivedIVRecipe(
             IndDesc.getKind(),
@@ -4188,8 +4188,8 @@ class VPDerivedIVRecipe : public VPSingleDefRecipe {
             Start, CanonicalIV, Step) {}
 
   VPDerivedIVRecipe(InductionDescriptor::InductionKind Kind,
-                    const FPMathOperator *FPBinOp, VPIRValue *Start,
-                    VPValue *IV, VPValue *Step)
+                    const FPMathOperator *FPBinOp, VPValue *Start, VPValue *IV,
+                    VPValue *Step)
       : VPSingleDefRecipe(VPRecipeBase::VPDerivedIVSC, {Start, IV, Step},
                           Start->getScalarType(), nullptr),
         Kind(Kind), FPBinOp(FPBinOp) {}
@@ -4211,7 +4211,7 @@ class VPDerivedIVRecipe : public VPSingleDefRecipe {
   InstructionCost computeCost(ElementCount VF,
                               VPCostContext &Ctx) const override;
 
-  VPIRValue *getStartValue() const { return cast<VPIRValue>(getOperand(0)); }
+  VPValue *getStartValue() const { return getOperand(0); }
   VPValue *getIndex() const { return getOperand(1); }
   VPValue *getStepValue() const { return getOperand(2); }
   const FPMathOperator *getFPBinOp() const { return FPBinOp; }
diff --git a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
index 1a10da2f1d3bf..0fcd5205bd1e6 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
@@ -3993,7 +3993,7 @@ static void expandVPWidenPointerInduction(VPWidenPointerInductionRecipe *R) {
 /// Expand a VPDerivedIVRecipe into executable recipes.
 static void expandVPDerivedIV(VPDerivedIVRecipe *R) {
   VPBuilder Builder(R);
-  VPIRValue *Start = R->getStartValue();
+  VPValue *Start = R->getStartValue();
   VPValue *Step = R->getStepValue();
   VPValue *Index = R->getIndex();
   Type *StepTy = Step->getScalarType();