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