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345daca305
the BasicBlock class where they should be. pred_begin/pred_end become methods on BasicBlock, and the cfg namespace isn't used anymore. llvm-svn: 691
28 lines
977 B
C++
28 lines
977 B
C++
//===- Interval.cpp - Interval class code ------------------------*- C++ -*--=//
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//
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// This file contains the definition of the cfg::Interval class, which
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// represents a 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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//===----------------------------------------------------------------------===//
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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 cfg::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 (BasicBlock::pred_iterator I = HeaderNode->pred_begin(),
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E = HeaderNode->pred_end(); 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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