[llvm-commits] [llvm] r64916 - /llvm/trunk/include/llvm/Analysis/LoopInfo.h
Dan Gohman
gohman at apple.com
Wed Feb 18 08:43:19 PST 2009
Author: djg
Date: Wed Feb 18 10:43:19 2009
New Revision: 64916
URL: http://llvm.org/viewvc/llvm-project?rev=64916&view=rev
Log:
Clarify the definition of "latch block" in a comment.
Modified:
llvm/trunk/include/llvm/Analysis/LoopInfo.h
Modified: llvm/trunk/include/llvm/Analysis/LoopInfo.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Analysis/LoopInfo.h?rev=64916&r1=64915&r2=64916&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Analysis/LoopInfo.h (original)
+++ llvm/trunk/include/llvm/Analysis/LoopInfo.h Wed Feb 18 10:43:19 2009
@@ -307,10 +307,10 @@
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;
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