forked from OSchip/llvm-project
55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
//===- Interval.cpp - Interval class code ---------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the definition of the Interval class, which represents a
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// partition of a control flow graph of some kind.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/Interval.h"
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#include "llvm/BasicBlock.h"
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#include "llvm/Support/CFG.h"
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#include <algorithm>
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// Interval Implementation
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//===----------------------------------------------------------------------===//
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// isLoop - Find out if there is a back edge in this interval...
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//
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bool Interval::isLoop() const {
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// There is a loop in this interval iff one of the predecessors of the header
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// node lives in the interval.
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for (::pred_iterator I = ::pred_begin(HeaderNode), E = ::pred_end(HeaderNode);
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I != E; ++I) {
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if (contains(*I)) return true;
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}
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return false;
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}
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void Interval::print(std::ostream &o) const {
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o << "-------------------------------------------------------------\n"
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<< "Interval Contents:\n";
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// Print out all of the basic blocks in the interval...
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std::copy(Nodes.begin(), Nodes.end(),
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std::ostream_iterator<BasicBlock*>(o, "\n"));
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o << "Interval Predecessors:\n";
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std::copy(Predecessors.begin(), Predecessors.end(),
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std::ostream_iterator<BasicBlock*>(o, "\n"));
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o << "Interval Successors:\n";
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std::copy(Successors.begin(), Successors.end(),
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std::ostream_iterator<BasicBlock*>(o, "\n"));
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}
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