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