[llvm] [NewPM] Remove CostModelAnalysis Legacy Pass (PR #72941)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-analysis

Author: Aiden Grossman (boomanaiden154)

<details>
<summary>Changes</summary>

This pass isn't used/tested anywhere upstream, so remove it.

---
Full diff: https://github.com/llvm/llvm-project/pull/72941.diff


5 Files Affected:

- (modified) llvm/include/llvm/Analysis/Passes.h (-7) 
- (modified) llvm/include/llvm/InitializePasses.h (-1) 
- (modified) llvm/include/llvm/LinkAllPasses.h (-1) 
- (modified) llvm/lib/Analysis/Analysis.cpp (-1) 
- (modified) llvm/lib/Analysis/CostModel.cpp (-73) 


``````````diff
diff --git a/llvm/include/llvm/Analysis/Passes.h b/llvm/include/llvm/Analysis/Passes.h
index ac1bc3549910c8c..58caf60b4ebe35a 100644
--- a/llvm/include/llvm/Analysis/Passes.h
+++ b/llvm/include/llvm/Analysis/Passes.h
@@ -32,13 +32,6 @@ namespace llvm {
   //
   FunctionPass *createDependenceAnalysisWrapperPass();
 
-  //===--------------------------------------------------------------------===//
-  //
-  // createCostModelAnalysisPass - This creates an instance of the
-  // CostModelAnalysis pass.
-  //
-  FunctionPass *createCostModelAnalysisPass();
-
   //===--------------------------------------------------------------------===//
   //
   // createDelinearizationPass - This pass implements attempts to restore
diff --git a/llvm/include/llvm/InitializePasses.h b/llvm/include/llvm/InitializePasses.h
index 2305db4f775d49c..2090a0a26531b34 100644
--- a/llvm/include/llvm/InitializePasses.h
+++ b/llvm/include/llvm/InitializePasses.h
@@ -83,7 +83,6 @@ void initializeCheckDebugMachineModulePass(PassRegistry &);
 void initializeCodeGenPreparePass(PassRegistry&);
 void initializeComplexDeinterleavingLegacyPassPass(PassRegistry&);
 void initializeConstantHoistingLegacyPassPass(PassRegistry&);
-void initializeCostModelAnalysisPass(PassRegistry&);
 void initializeCycleInfoWrapperPassPass(PassRegistry &);
 void initializeDAEPass(PassRegistry&);
 void initializeDAHPass(PassRegistry&);
diff --git a/llvm/include/llvm/LinkAllPasses.h b/llvm/include/llvm/LinkAllPasses.h
index 0d15481034151df..273d05f3cddca2d 100644
--- a/llvm/include/llvm/LinkAllPasses.h
+++ b/llvm/include/llvm/LinkAllPasses.h
@@ -69,7 +69,6 @@ namespace {
       (void) llvm::createCallGraphViewerPass();
       (void) llvm::createCFGSimplificationPass();
       (void) llvm::createStructurizeCFGPass();
-      (void) llvm::createCostModelAnalysisPass();
       (void) llvm::createDeadArgEliminationPass();
       (void) llvm::createDeadCodeEliminationPass();
       (void) llvm::createDependenceAnalysisWrapperPass();
diff --git a/llvm/lib/Analysis/Analysis.cpp b/llvm/lib/Analysis/Analysis.cpp
index 80ea80303644449..7b15542ee38fbf8 100644
--- a/llvm/lib/Analysis/Analysis.cpp
+++ b/llvm/lib/Analysis/Analysis.cpp
@@ -25,7 +25,6 @@ void llvm::initializeAnalysis(PassRegistry &Registry) {
   initializeCallGraphDOTPrinterPass(Registry);
   initializeCallGraphPrinterLegacyPassPass(Registry);
   initializeCallGraphViewerPass(Registry);
-  initializeCostModelAnalysisPass(Registry);
   initializeCFGViewerLegacyPassPass(Registry);
   initializeCFGPrinterLegacyPassPass(Registry);
   initializeCFGOnlyViewerLegacyPassPass(Registry);
diff --git a/llvm/lib/Analysis/CostModel.cpp b/llvm/lib/Analysis/CostModel.cpp
index 1782b399e7fd093..7e2ddea3bbfb7c2 100644
--- a/llvm/lib/Analysis/CostModel.cpp
+++ b/llvm/lib/Analysis/CostModel.cpp
@@ -47,79 +47,6 @@ static cl::opt<bool> TypeBasedIntrinsicCost("type-based-intrinsic-cost",
 #define CM_NAME "cost-model"
 #define DEBUG_TYPE CM_NAME
 
-namespace {
-  class CostModelAnalysis : public FunctionPass {
-
-  public:
-    static char ID; // Class identification, replacement for typeinfo
-    CostModelAnalysis() : FunctionPass(ID) {
-      initializeCostModelAnalysisPass(
-        *PassRegistry::getPassRegistry());
-    }
-
-  private:
-    void getAnalysisUsage(AnalysisUsage &AU) const override;
-    bool runOnFunction(Function &F) override;
-    void print(raw_ostream &OS, const Module*) const override;
-
-    /// The function that we analyze.
-    Function *F = nullptr;
-    /// Target information.
-    const TargetTransformInfo *TTI = nullptr;
-  };
-}  // End of anonymous namespace
-
-// Register this pass.
-char CostModelAnalysis::ID = 0;
-static const char cm_name[] = "Cost Model Analysis";
-INITIALIZE_PASS_BEGIN(CostModelAnalysis, CM_NAME, cm_name, false, true)
-INITIALIZE_PASS_END  (CostModelAnalysis, CM_NAME, cm_name, false, true)
-
-FunctionPass *llvm::createCostModelAnalysisPass() {
-  return new CostModelAnalysis();
-}
-
-void
-CostModelAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
-  AU.setPreservesAll();
-}
-
-bool
-CostModelAnalysis::runOnFunction(Function &F) {
- this->F = &F;
- auto *TTIWP = getAnalysisIfAvailable<TargetTransformInfoWrapperPass>();
- TTI = TTIWP ? &TTIWP->getTTI(F) : nullptr;
-
- return false;
-}
-
-void CostModelAnalysis::print(raw_ostream &OS, const Module*) const {
-  if (!F)
-    return;
-
-  for (BasicBlock &B : *F) {
-    for (Instruction &Inst : B) {
-      InstructionCost Cost;
-      auto *II = dyn_cast<IntrinsicInst>(&Inst);
-      if (II && TypeBasedIntrinsicCost) {
-        IntrinsicCostAttributes ICA(II->getIntrinsicID(), *II,
-                                    InstructionCost::getInvalid(), true);
-        Cost = TTI->getIntrinsicInstrCost(ICA, CostKind);
-      }
-      else {
-        Cost = TTI->getInstructionCost(&Inst, CostKind);
-      }
-
-      if (auto CostVal = Cost.getValue())
-        OS << "Cost Model: Found an estimated cost of " << *CostVal;
-      else
-        OS << "Cost Model: Invalid cost";
-
-      OS << " for instruction: " << Inst << "\n";
-    }
-  }
-}
-
 PreservedAnalyses CostModelPrinterPass::run(Function &F,
                                             FunctionAnalysisManager &AM) {
   auto &TTI = AM.getResult<TargetIRAnalysis>(F);

``````````

</details>


https://github.com/llvm/llvm-project/pull/72941