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Clarify the definition of "latch block" in a comment.

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llvm-svn: 64916
This commit is contained in:
Dan Gohman 2009-02-18 16:43:19 +00:00
parent 30770ee7b3
commit 5ce716719b
1 changed files with 4 additions and 4 deletions
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8
include/llvm/Analysis/LoopInfo.h
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@ -307,10 +307,10 @@ public:
return Out;
}
/// getLoopLatch - If there is a latch block for this loop, return it. A
/// latch block is the canonical backedge for a loop. A loop header in normal
/// form has two edges into it: one from a preheader and one from a latch
/// block.
/// getLoopLatch - If there is a single latch block for this loop, return it.
/// A latch block is a block that contains a branch back to the header.
/// A loop header in normal form has two edges into it: one from a preheader
/// and one from a latch block.
BlockT *getLoopLatch() const {
BlockT *Header = getHeader();
typedef GraphTraits<Inverse<BlockT*> > InvBlockTraits;