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Revert r114919, which caused some serious regressions on ARM.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115053 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2010-09-29 18:05:19 +00:00
parent 1619beb4e2
commit 69daca59ff
1 changed files with 1 additions and 6 deletions
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7
lib/Transforms/Scalar/LoopUnrollPass.cpp
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@ -158,12 +158,7 @@ bool LoopUnroll::runOnLoop(Loop *L, LPPassManager &LPM) {
DEBUG(dbgs() << " Not unrolling loop with inlinable calls.\n");
return false;
}
// NOTE: We multiply by the loop depth because unrolling inner loops of
// very deep nests tends to result in high register pressure, which we don't
// currently recover from very well. When and if the register allocator/
// spiller improves to compensate, this should be re-evaluated.
uint64_t Size = (uint64_t)LoopSize*Count*L->getLoopDepth();
uint64_t Size = (uint64_t)LoopSize*Count;
if (TripCount != 1 && Size > CurrentThreshold) {
DEBUG(dbgs() << " Too large to fully unroll with count: " << Count
<< " because size: " << Size << ">" << CurrentThreshold << "\n");