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