37 lines · cpp
1//===- CFGSCCPrinter.cpp --------------------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#include "llvm/Analysis/CFGSCCPrinter.h"10#include "llvm/ADT/SCCIterator.h"11#include "llvm/IR/CFG.h"12 13using namespace llvm;14 15PreservedAnalyses CFGSCCPrinterPass::run(Function &F,16 FunctionAnalysisManager &AM) {17 unsigned SccNum = 0;18 OS << "SCCs for Function " << F.getName() << " in PostOrder:";19 for (scc_iterator<Function *> SCCI = scc_begin(&F); !SCCI.isAtEnd(); ++SCCI) {20 const std::vector<BasicBlock *> &NextSCC = *SCCI;21 OS << "\nSCC #" << ++SccNum << ": ";22 bool First = true;23 for (BasicBlock *BB : NextSCC) {24 if (First)25 First = false;26 else27 OS << ", ";28 BB->printAsOperand(OS, false);29 }30 if (NextSCC.size() == 1 && SCCI.hasCycle())31 OS << " (Has self-loop).";32 }33 OS << "\n";34 35 return PreservedAnalyses::all();36}37