[llvm] [VPlan] Remove dead member functions (NFC) (PR #208936)

[Florian Hahn via llvm-commits]

https://github.com/fhahn created https://github.com/llvm/llvm-project/pull/208936

Remove member functions with no remaining callers anywhere in the tree:

 - VPExpressionRecipe::getOperandOfResultType
 - VPBlockBase::getSingleHierarchicalSuccessor (the predecessor variant is still used and is kept)
 - VPIRFlags::hasNonNegFlag (isNonNeg is still used)
 - VPWidenIntOrFpInductionRecipe::getStartValue, which is an exact duplicate of the inherited VPWidenInductionRecipe::getStartValue.

>From 162cb8e02c866c7860e7b7c45f2b7f2964901497 Mon Sep 17 00:00:00 2001
From: Florian Hahn <flo at fhahn.com>
Date: Fri, 19 Jun 2026 22:52:08 +0100
Subject: [PATCH] [VPlan] Remove dead member functions (NFC)

Remove member functions with no remaining callers anywhere in the tree:

 - VPExpressionRecipe::getOperandOfResultType
 - VPBlockBase::getSingleHierarchicalSuccessor (the predecessor variant is
   still used and is kept)
 - VPIRFlags::hasNonNegFlag (isNonNeg is still used)
 - VPWidenIntOrFpInductionRecipe::getStartValue, which is an exact
   duplicate of the inherited VPWidenInductionRecipe::getStartValue.
---
 llvm/lib/Transforms/Vectorize/VPlan.h | 20 --------------------
 1 file changed, 20 deletions(-)

diff --git a/llvm/lib/Transforms/Vectorize/VPlan.h b/llvm/lib/Transforms/Vectorize/VPlan.h
index 1ce5786793c49..46e2ad4716323 100644
--- a/llvm/lib/Transforms/Vectorize/VPlan.h
+++ b/llvm/lib/Transforms/Vectorize/VPlan.h
@@ -258,12 +258,6 @@ class LLVM_ABI_FOR_TEST VPBlockBase {
     return getEnclosingBlockWithSuccessors()->getSuccessors();
   }
 
-  /// \return the hierarchical successor of this VPBlockBase if it has a single
-  /// hierarchical successor. Otherwise return a null pointer.
-  VPBlockBase *getSingleHierarchicalSuccessor() {
-    return getEnclosingBlockWithSuccessors()->getSingleSuccessor();
-  }
-
   /// \return the predecessors either attached directly to this VPBlockBase or,
   /// if this VPBlockBase is the entry block of a VPRegionBlock and has no
   /// predecessors of its own, search recursively for the first enclosing
@@ -1004,9 +998,6 @@ class VPIRFlags {
 
   LLVM_ABI_FOR_TEST FastMathFlags getFastMathFlagsOrNone() const;
 
-  /// Returns true if the recipe has non-negative flag.
-  bool hasNonNegFlag() const { return OpType == OperationType::NonNegOp; }
-
   bool isNonNeg() const {
     assert(OpType == OperationType::NonNegOp &&
            "recipe doesn't have a NNEG flag");
@@ -2653,9 +2644,6 @@ class VPWidenIntOrFpInductionRecipe : public VPWidenInductionRecipe,
                      "expandVPWidenIntOrFpInductionRecipe");
   }
 
-  /// Returns the start value of the induction.
-  VPIRValue *getStartValue() const { return cast<VPIRValue>(getOperand(0)); }
-
   /// If the recipe has been unrolled, return the VPValue for the induction
   /// increment, otherwise return null.
   VPValue *getSplatVFValue() const {
@@ -3647,14 +3635,6 @@ class VPExpressionRecipe : public VPSingleDefRecipe {
     return new VPExpressionRecipe(ExpressionType, NewExpressiondRecipes);
   }
 
-  /// Return the VPValue to use to infer the result type of the recipe.
-  VPValue *getOperandOfResultType() const {
-    unsigned OpIdx =
-        cast<VPReductionRecipe>(ExpressionRecipes.back())->isConditional() ? 2
-                                                                           : 1;
-    return getOperand(getNumOperands() - OpIdx);
-  }
-
   /// Insert the recipes of the expression back into the VPlan, directly before
   /// the current recipe. Leaves the expression recipe empty, which must be
   /// removed before codegen.