llvm/lib/Analysis/CycleAnalysis.cpp

   1 //===- CycleAnalysis.cpp - Compute CycleInfo for LLVM IR ------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/Analysis/CycleAnalysis.h"
  10 #include "llvm/IR/CFG.h" // for successors found by ADL in GenericCycleImpl.h
  11 #include "llvm/InitializePasses.h"
  12
  13 using namespace llvm;
  14
  15 namespace llvm {
  16 class Module;
  17 } // namespace llvm
  18
  19 CycleInfo CycleAnalysis::run(Function &F, FunctionAnalysisManager &) {
  20   CycleInfo CI;
  21   CI.compute(F);
  22   return CI;
  23 }
  24
  25 AnalysisKey CycleAnalysis::Key;
  26
  27 CycleInfoPrinterPass::CycleInfoPrinterPass(raw_ostream &OS) : OS(OS) {}
  28
  29 PreservedAnalyses CycleInfoPrinterPass::run(Function &F,
  30                                             FunctionAnalysisManager &AM) {
  31   OS << "CycleInfo for function: " << F.getName() << "\n";
  32   AM.getResult<CycleAnalysis>(F).print(OS);
  33
  34   return PreservedAnalyses::all();
  35 }
  36
  37 PreservedAnalyses CycleInfoVerifierPass::run(Function &F,
  38                                              FunctionAnalysisManager &AM) {
  39   CycleInfo &CI = AM.getResult<CycleAnalysis>(F);
  40   CI.verify();
  41   return PreservedAnalyses::all();
  42 }
  43
  44 //===----------------------------------------------------------------------===//
  45 //  CycleInfoWrapperPass Implementation
  46 //===----------------------------------------------------------------------===//
  47 //
  48 // The implementation details of the wrapper pass that holds a CycleInfo
  49 // suitable for use with the legacy pass manager.
  50 //
  51 //===----------------------------------------------------------------------===//
  52
  53 char CycleInfoWrapperPass::ID = 0;
  54
  55 CycleInfoWrapperPass::CycleInfoWrapperPass() : FunctionPass(ID) {
  56   initializeCycleInfoWrapperPassPass(*PassRegistry::getPassRegistry());
  57 }
  58
  59 INITIALIZE_PASS_BEGIN(CycleInfoWrapperPass, "cycles", "Cycle Info Analysis",
  60                       true, true)
  61 INITIALIZE_PASS_END(CycleInfoWrapperPass, "cycles", "Cycle Info Analysis", true,
  62                     true)
  63
  64 void CycleInfoWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const {
  65   AU.setPreservesAll();
  66 }
  67
  68 bool CycleInfoWrapperPass::runOnFunction(Function &Func) {
  69   CI.clear();
  70
  71   F = &Func;
  72   CI.compute(Func);
  73   return false;
  74 }
  75
  76 void CycleInfoWrapperPass::print(raw_ostream &OS, const Module *) const {
  77   OS << "CycleInfo for function: " << F->getName() << "\n";
  78   CI.print(OS);
  79 }
  80
  81 void CycleInfoWrapperPass::releaseMemory() {
  82   CI.clear();
  83   F = nullptr;
  84 }