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455889aa79
llvm/Support/CFG.h * Make pred & succ iterators for intervals global functions * Add #includes that are now neccesary because BasicBlock.h doesn't include InstrTypes.h anymore git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1750 91177308-0d34-0410-b5e6-96231b3b80d8
29 lines
970 B
C++
29 lines
970 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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#include "llvm/Support/CFG.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 (::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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