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/ADT/StringExtras.h"
12#include "llvm/IR/CFG.h"
13
14using namespace llvm;
15
16PreservedAnalyses CFGSCCPrinterPass::run(Function &F,
17 FunctionAnalysisManager &AM) {
18 unsigned SccNum = 0;
19 OS << "SCCs for Function " << F.getName() << " in PostOrder:";
20 for (scc_iterator<Function *> SCCI = scc_begin(G: &F); !SCCI.isAtEnd(); ++SCCI) {
21 const std::vector<BasicBlock *> &NextSCC = *SCCI;
22 OS << "\nSCC #" << ++SccNum << ": ";
23 ListSeparator LS;
24 for (BasicBlock *BB : NextSCC) {
25 OS << LS;
26 BB->printAsOperand(O&: OS, PrintType: false);
27 }
28 if (NextSCC.size() == 1 && SCCI.hasCycle())
29 OS << " (Has self-loop).";
30 }
31 OS << "\n";
32
33 return PreservedAnalyses::all();
34}
35