[llvm] [VPlan] Strip dead code, cleanup includes in header (NFC) (PR #162641)

[Ramkumar Ramachandra via llvm-commits]

https://github.com/artagnon created https://github.com/llvm/llvm-project/pull/162641

None

>From 3b9a5996574882e5dce24f4ca7ce34638e68e6a5 Mon Sep 17 00:00:00 2001
From: Ramkumar Ramachandra <ramkumar.ramachandra at codasip.com>
Date: Thu, 9 Oct 2025 13:15:51 +0100
Subject: [PATCH] [VPlan] Strip dead code, cleanup includes in header (NFC)

---
 llvm/lib/Transforms/Vectorize/VPlan.h | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/llvm/lib/Transforms/Vectorize/VPlan.h b/llvm/lib/Transforms/Vectorize/VPlan.h
index fb696bea671af..d5f42d30364a0 100644
--- a/llvm/lib/Transforms/Vectorize/VPlan.h
+++ b/llvm/lib/Transforms/Vectorize/VPlan.h
@@ -24,12 +24,9 @@
 #ifndef LLVM_TRANSFORMS_VECTORIZE_VPLAN_H
 #define LLVM_TRANSFORMS_VECTORIZE_VPLAN_H
 
-#include "VPlanAnalysis.h"
 #include "VPlanValue.h"
 #include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/SmallBitVector.h"
 #include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/ADT/SmallSet.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/ADT/ilist.h"
@@ -41,10 +38,11 @@
 #include "llvm/IR/Operator.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/InstructionCost.h"
-#include <algorithm>
 #include <cassert>
 #include <cstddef>
+#include <functional>
 #include <string>
+#include <utility>
 
 namespace llvm {
 
@@ -346,13 +344,6 @@ class LLVM_ABI_FOR_TEST VPBlockBase {
   /// Return the cost of the block.
   virtual InstructionCost cost(ElementCount VF, VPCostContext &Ctx) = 0;
 
-  /// Return true if it is legal to hoist instructions into this block.
-  bool isLegalToHoistInto() {
-    // There are currently no constraints that prevent an instruction to be
-    // hoisted into a VPBlockBase.
-    return true;
-  }
-
 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
   void printAsOperand(raw_ostream &OS, bool PrintType = false) const {
     OS << getName();