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Don't bother cleaning up if there's nothing to clean up.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91288 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-12-14 17:10:44 +00:00
parent 6dc1ef3923
commit a77d588c75
1 changed files with 7 additions and 7 deletions
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14
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -2754,15 +2754,15 @@ bool LoopStrengthReduce::runOnLoop(Loop *L, LPPassManager &LPM) {
// After all sharing is done, see if we can adjust the loop to test against
// zero instead of counting up to a maximum. This is usually faster.
OptimizeLoopCountIV(L);
// We're done analyzing this loop; release all the state we built up for it.
IVsByStride.clear();
// Clean up after ourselves
if (!DeadInsts.empty())
DeleteTriviallyDeadInstructions();
}
// We're done analyzing this loop; release all the state we built up for it.
IVsByStride.clear();
// Clean up after ourselves
if (!DeadInsts.empty())
DeleteTriviallyDeadInstructions();
// At this point, it is worth checking to see if any recurrence PHIs are also
// dead, so that we can remove them as well.
DeleteDeadPHIs(L->getHeader());