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
run(Function & F,FunctionAnalysisManager &)19 CycleInfo CycleAnalysis::run(Function &F, FunctionAnalysisManager &) {
20 CycleInfo CI;
21 CI.compute(F);
22 return CI;
23 }
24
25 AnalysisKey CycleAnalysis::Key;
26
CycleInfoPrinterPass(raw_ostream & OS)27 CycleInfoPrinterPass::CycleInfoPrinterPass(raw_ostream &OS) : OS(OS) {}
28
run(Function & F,FunctionAnalysisManager & AM)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
run(Function & F,FunctionAnalysisManager & AM)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
CycleInfoWrapperPass()55 CycleInfoWrapperPass::CycleInfoWrapperPass() : FunctionPass(ID) {}
56
57 INITIALIZE_PASS_BEGIN(CycleInfoWrapperPass, "cycles", "Cycle Info Analysis",
58 true, true)
59 INITIALIZE_PASS_END(CycleInfoWrapperPass, "cycles", "Cycle Info Analysis", true,
60 true)
61
getAnalysisUsage(AnalysisUsage & AU) const62 void CycleInfoWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const {
63 AU.setPreservesAll();
64 }
65
runOnFunction(Function & Func)66 bool CycleInfoWrapperPass::runOnFunction(Function &Func) {
67 CI.clear();
68
69 F = &Func;
70 CI.compute(Func);
71 return false;
72 }
73
print(raw_ostream & OS,const Module *) const74 void CycleInfoWrapperPass::print(raw_ostream &OS, const Module *) const {
75 OS << "CycleInfo for function: " << F->getName() << "\n";
76 CI.print(OS);
77 }
78
releaseMemory()79 void CycleInfoWrapperPass::releaseMemory() {
80 CI.clear();
81 F = nullptr;
82 }
83