[InstCombine] Remove unused function createInstructionCombiningPass

The last use was removed by:

  commit 934c82d31801e65aa3bbe99a0e64f903621c2e04
  Author: Florian Hahn <flo@fhahn.com>
  Date:   Fri Feb 24 13:39:32 2023 +0100

Once I remove createInstructionCombiningPass, then:

InstructionCombiningPass::InstructionCombiningPass(unsigned MaxIterations)

becomes unused.  Once I remove that:

InstructionCombiningPass::MaxIterations is always initialized with
InstCombineDefaultMaxIterations, so this patch does the constant
propagation and removes InstructionCombiningPass::MaxIterations as
well.

Differential Revision: https://reviews.llvm.org/D152641

diff --git a/llvm/include/llvm/Transforms/InstCombine/InstCombine.h b/llvm/include/llvm/Transforms/InstCombine/InstCombine.h
index 557d0a4..3e1c6e0 100644 (file)
--- a/llvm/include/llvm/Transforms/InstCombine/InstCombine.h
+++ b/llvm/include/llvm/Transforms/InstCombine/InstCombine.h
@@ -63,13 +63,11 @@ public:
 /// will try to combine all instructions in the function.
 class InstructionCombiningPass : public FunctionPass {
   InstructionWorklist Worklist;
-  const unsigned MaxIterations;
 
 public:
   static char ID; // Pass identification, replacement for typeid
 
   explicit InstructionCombiningPass();
-  explicit InstructionCombiningPass(unsigned MaxIterations);
 
   void getAnalysisUsage(AnalysisUsage &AU) const override;
   bool runOnFunction(Function &F) override;
@@ -88,7 +86,6 @@ public:
 //    %Z = add int 2, %X
 //
 FunctionPass *createInstructionCombiningPass();
-FunctionPass *createInstructionCombiningPass(unsigned MaxIterations);
 }
 
 #undef DEBUG_TYPE

diff --git a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
index 6254112..905f9c3 100644 (file)
--- a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
@@ -4161,18 +4161,13 @@ bool InstructionCombiningPass::runOnFunction(Function &F) {
       nullptr;
 
   return combineInstructionsOverFunction(F, Worklist, AA, AC, TLI, TTI, DT, ORE,
-                                         BFI, PSI, MaxIterations, LI);
+                                         BFI, PSI,
+                                         InstCombineDefaultMaxIterations, LI);
 }
 
 char InstructionCombiningPass::ID = 0;
 
-InstructionCombiningPass::InstructionCombiningPass()
-    : FunctionPass(ID), MaxIterations(InstCombineDefaultMaxIterations) {
-  initializeInstructionCombiningPassPass(*PassRegistry::getPassRegistry());
-}
-
-InstructionCombiningPass::InstructionCombiningPass(unsigned MaxIterations)
-    : FunctionPass(ID), MaxIterations(MaxIterations) {
+InstructionCombiningPass::InstructionCombiningPass() : FunctionPass(ID) {
   initializeInstructionCombiningPassPass(*PassRegistry::getPassRegistry());
 }
 
@@ -4198,7 +4193,3 @@ void llvm::initializeInstCombine(PassRegistry &Registry) {
 FunctionPass *llvm::createInstructionCombiningPass() {
   return new InstructionCombiningPass();
 }
-
-FunctionPass *llvm::createInstructionCombiningPass(unsigned MaxIterations) {
-  return new InstructionCombiningPass(MaxIterations);
-}