[Scalar] Remove CallSiteSplittingLegacyPass

[kazu]

Summary

The last use was removed by:

commit fd48d0a0adaa5fcdd24d02a58ba8a6210adafc28
Author: Kazu Hirata <[e-mail]>
Date:   Sat Jun 10 13:51:37 2023 -0700

[nikic]

LG

llvm/include/llvm/InitializePasses.h

 void initializeCFGViewerLegacyPassPass(PassRegistry&);
 void initializeCFIFixupPass(PassRegistry&);
 void initializeCFIInstrInserterPass(PassRegistry&);
 void initializeCallBrPreparePass(PassRegistry &);
 void initializeCallGraphDOTPrinterPass(PassRegistry&);
 void initializeCallGraphPrinterLegacyPassPass(PassRegistry&);
 void initializeCallGraphViewerPass(PassRegistry&);
 void initializeCallGraphWrapperPassPass(PassRegistry&);
-void initializeCallSiteSplittingLegacyPassPass(PassRegistry&);
 void initializeCheckDebugMachineModulePass(PassRegistry &);
 void initializeCodeGenPreparePass(PassRegistry&);
 void initializeComplexDeinterleavingLegacyPassPass(PassRegistry&);
 void initializeConstantHoistingLegacyPassPass(PassRegistry&);
 void initializeConstantMergeLegacyPassPass(PassRegistry&);
 void initializeCorrelatedValuePropagationPass(PassRegistry&);
 void initializeCostModelAnalysisPass(PassRegistry&);
 void initializeCrossDSOCFIPass(PassRegistry&);

llvm/lib/Transforms/Scalar/CallSiteSplitting.cpp

while (II != IE && &*II != BB.getTerminator()) {
       // itself might have been erased on splitting.
       if (IsMustTail)
         break;
     }
   }
   return Changed;
 }
 
-namespace {
-struct CallSiteSplittingLegacyPass : public FunctionPass {
-  static char ID;
-  CallSiteSplittingLegacyPass() : FunctionPass(ID) {
-    initializeCallSiteSplittingLegacyPassPass(*PassRegistry::getPassRegistry());
-  }
-
-  void getAnalysisUsage(AnalysisUsage &AU) const override {
-    AU.addRequired<TargetLibraryInfoWrapperPass>();
-    AU.addRequired<TargetTransformInfoWrapperPass>();
-    AU.addRequired<DominatorTreeWrapperPass>();
-    AU.addPreserved<DominatorTreeWrapperPass>();
-    FunctionPass::getAnalysisUsage(AU);
-  }
-
-  bool runOnFunction(Function &F) override {
-    if (skipFunction(F))
-      return false;
-
-    auto &TLI = getAnalysis<TargetLibraryInfoWrapperPass>().getTLI(F);
-    auto &TTI = getAnalysis<TargetTransformInfoWrapperPass>().getTTI(F);
-    auto &DT = getAnalysis<DominatorTreeWrapperPass>().getDomTree();
-    return doCallSiteSplitting(F, TLI, TTI, DT);
-  }
-};
-} // namespace
-
-char CallSiteSplittingLegacyPass::ID = 0;
-INITIALIZE_PASS_BEGIN(CallSiteSplittingLegacyPass, "callsite-splitting",
-                      "Call-site splitting", false, false)
-INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
-INITIALIZE_PASS_DEPENDENCY(TargetTransformInfoWrapperPass)
-INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)
-INITIALIZE_PASS_END(CallSiteSplittingLegacyPass, "callsite-splitting",
-                    "Call-site splitting", false, false)
-
 PreservedAnalyses CallSiteSplittingPass::run(Function &F,
                                              FunctionAnalysisManager &AM) {
   auto &TLI = AM.getResult<TargetLibraryAnalysis>(F);
   auto &TTI = AM.getResult<TargetIRAnalysis>(F);
   auto &DT = AM.getResult<DominatorTreeAnalysis>(F);
 
   if (!doCallSiteSplitting(F, TLI, TTI, DT))
     return PreservedAnalyses::all();
   PreservedAnalyses PA;
   PA.preserve<DominatorTreeAnalysis>();
   return PA;
 }

llvm/lib/Transforms/Scalar/Scalar.cpp

 
 #include "llvm/InitializePasses.h"
 
 using namespace llvm;
 
 /// initializeScalarOptsPasses - Initialize all passes linked into the
 /// ScalarOpts library.
 void llvm::initializeScalarOpts(PassRegistry &Registry) {
-  initializeCallSiteSplittingLegacyPassPass(Registry);
   initializeConstantHoistingLegacyPassPass(Registry);
   initializeDCELegacyPassPass(Registry);
   initializeScalarizerLegacyPassPass(Registry);
   initializeGuardWideningLegacyPassPass(Registry);
   initializeLoopGuardWideningLegacyPassPass(Registry);
   initializeGVNLegacyPassPass(Registry);
   initializeEarlyCSELegacyPassPass(Registry);
   initializeEarlyCSEMemSSALegacyPassPass(Registry);