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LoopUnrollPass: Use variable "Threshold" instead of "CurrentThreshold" when

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reducing unroll count, otherwise the reduced unroll count is not taking
  the "OptimizeForSize" attribute into account.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154007 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hongbin Zheng 2012-04-04 11:44:08 +00:00
parent a95b4ebf3c
commit 00b73a5e44
1 changed files with 2 additions and 2 deletions
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4
lib/Transforms/Scalar/LoopUnrollPass.cpp
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@ -197,13 +197,13 @@ bool LoopUnroll::runOnLoop(Loop *L, LPPassManager &LPM) {
} }
if (TripCount) { if (TripCount) {
// Reduce unroll count to be modulo of TripCount for partial unrolling // Reduce unroll count to be modulo of TripCount for partial unrolling
Count = CurrentThreshold / LoopSize; Count = Threshold / LoopSize;
while (Count != 0 && TripCount%Count != 0) while (Count != 0 && TripCount%Count != 0)
Count--; Count--;
} }
else if (UnrollRuntime) { else if (UnrollRuntime) {
// Reduce unroll count to be a lower power-of-two value // Reduce unroll count to be a lower power-of-two value
while (Count != 0 && Size > CurrentThreshold) { while (Count != 0 && Size > Threshold) {
Count >>= 1; Count >>= 1;
Size = LoopSize*Count; Size = LoopSize*Count;
} }