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//===- CFGSCCPrinter.cpp --------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/CFGSCCPrinter.h"
#include "llvm/ADT/SCCIterator.h"
#include "llvm/IR/CFG.h"
using namespace llvm;
PreservedAnalyses CFGSCCPrinterPass::run(Function &F,
FunctionAnalysisManager &AM) {
unsigned SccNum = 0;
OS << "SCCs for Function " << F.getName() << " in PostOrder:";
for (scc_iterator<Function *> SCCI = scc_begin(&F); !SCCI.isAtEnd(); ++SCCI) {
const std::vector<BasicBlock *> &NextSCC = *SCCI;
OS << "\nSCC #" << ++SccNum << ": ";
bool First = true;
for (BasicBlock *BB : NextSCC) {
if (First)
First = false;
else
OS << ", ";
BB->printAsOperand(OS, false);
}
if (NextSCC.size() == 1 && SCCI.hasCycle())
OS << " (Has self-loop).";
}
OS << "\n";
return PreservedAnalyses::all();
}
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