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[LoopUnroll] Check partial unrolling is enabled before initialization. NFC.

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Differential Revision: https://reviews.llvm.org/D23891

llvm-svn: 285330
This commit is contained in:
Haicheng Wu 2016-10-27 18:40:02 +00:00
parent 68d206a9d2
commit 78fd509204
1 changed files with 2 additions and 2 deletions
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4
lib/Transforms/Scalar/LoopUnrollPass.cpp
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@ -803,8 +803,6 @@ static bool computeUnrollCount(
// 4rd priority is partial unrolling.
// Try partial unroll only when TripCount could be staticaly calculated.
if (TripCount) {
if (UP.Count == 0)
UP.Count = TripCount;
UP.Partial |= ExplicitUnroll;
if (!UP.Partial) {
DEBUG(dbgs() << " will not try to unroll partially because "
@ -812,6 +810,8 @@ static bool computeUnrollCount(
UP.Count = 0;
return false;
}
if (UP.Count == 0)
UP.Count = TripCount;
if (UP.PartialThreshold != NoThreshold) {
// Reduce unroll count to be modulo of TripCount for partial unrolling.
UnrolledSize = (uint64_t)(LoopSize - BEInsns) * UP.Count + BEInsns;