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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
//===- Interval.cpp - Interval class code ---------------------------------===//
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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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//
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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/IR/BasicBlock.h"
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#include "llvm/IR/CFG.h"
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#include "llvm/Support/raw_ostream.h"
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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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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))
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return true;
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return false;
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}
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void Interval::print(raw_ostream &OS) const {
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OS << "-------------------------------------------------------------\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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for (const BasicBlock *Node : Nodes)
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OS << *Node << "\n";
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OS << "Interval Predecessors:\n";
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for (const BasicBlock *Predecessor : Predecessors)
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OS << *Predecessor << "\n";
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OS << "Interval Successors:\n";
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for (const BasicBlock *Successor : Successors)
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OS << *Successor << "\n";
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}
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