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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "llvm/Analysis/CFGSCCPrinter.h" 10 #include "llvm/ADT/SCCIterator.h" 11 #include "llvm/IR/CFG.h" 12 13 using namespace llvm; 14 15 PreservedAnalyses 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 else 27 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