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Simplify and reduce indentation using early exits. 

No intended functionality change.

llvm-svn: 78888
This commit is contained in:
Andreas Bolka 2009-08-13 03:00:57 +00:00
parent 438ba80afa
commit aef432505b
1 changed files with 13 additions and 18 deletions
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31
llvm/lib/Transforms/Scalar/LoopUnroll.cpp
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@ -133,11 +133,9 @@ bool LoopUnroll::runOnLoop(Loop *L, LPPassManager &LPM) {
// completely unroll (subject to the threshold, checked below); otherwise
// try to find greatest modulo of the trip count which is still under
// threshold value.
if (TripCount != 0) {
Count = TripCount;
} else {
if (TripCount == 0)
return false;
}
Count = TripCount;
}
// Enforce the threshold.
@ -148,24 +146,21 @@ bool LoopUnroll::runOnLoop(Loop *L, LPPassManager &LPM) {
if (TripCount != 1 && Size > UnrollThreshold) {
DEBUG(errs() << " Too large to fully unroll with count: " << Count
<< " because size: " << Size << ">" << UnrollThreshold << "\n");
if (UnrollAllowPartial) {
// Reduce unroll count to be modulo of TripCount for partial unrolling
Count = UnrollThreshold / LoopSize;
while (Count != 0 && TripCount%Count != 0) {
Count--;
}
if (Count < 2) {
DEBUG(errs() << " could not unroll partially\n");
return false;
} else {
DEBUG(errs() << " partially unrolling with count: "
<< Count << "\n");
}
} else {
if (!UnrollAllowPartial) {
DEBUG(errs() << " will not try to unroll partially because "
<< "-unroll-allow-partial not given\n");
return false;
}
// Reduce unroll count to be modulo of TripCount for partial unrolling
Count = UnrollThreshold / LoopSize;
while (Count != 0 && TripCount%Count != 0) {
Count--;
}
if (Count < 2) {
DEBUG(errs() << " could not unroll partially\n");
return false;
}
DEBUG(errs() << " partially unrolling with count: " << Count << "\n");
}
}