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Fix grammar, add comment

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7967 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-08-18 22:54:06 +00:00
parent 13fc1eaee5
commit e6f7f61cda
1 changed files with 4 additions and 1 deletions
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5
lib/Transforms/Utils/LoopSimplify.cpp
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@ -10,7 +10,7 @@
// Loop exit-block insertion guarantees that all exit blocks from the loop
// (blocks which are outside of the loop that have predecessors inside of the
// loop) are dominated by the loop header. This simplifies transformations such
// as store-sinking that is built into LICM.
// as store-sinking that are built into LICM.
//
// Note that the simplifycfg pass will clean up blocks which are split out but
// end up being unnecessary, so usage of this pass does not neccesarily
@ -91,6 +91,9 @@ bool Preheaders::ProcessLoop(Loop *L) {
Changed = true;
}
// Regardless of whether or not we added a preheader to the loop we must
// guarantee that the preheader dominates all exit nodes. If there are any
// exit nodes not dominated, split them now.
DominatorSet &DS = getAnalysis<DominatorSet>();
BasicBlock *Header = L->getHeader();
for (unsigned i = 0, e = L->getExitBlocks().size(); i != e; ++i)