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Simplify and reduce indentation using early exits.

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No intended functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78888 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andreas Bolka
2009-08-13 03:00:57 +00:00
parent 52e539cbb8
commit ec40eb411a
1 changed files with 13 additions and 18 deletions
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21
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 // completely unroll (subject to the threshold, checked below); otherwise
// try to find greatest modulo of the trip count which is still under // try to find greatest modulo of the trip count which is still under
// threshold value. // threshold value.
if (TripCount != 0) { if (TripCount == 0)
Count = TripCount;
} else {
return false; return false;
} Count = TripCount;
} }
// Enforce the threshold. // Enforce the threshold.
@@ -148,7 +146,11 @@ bool LoopUnroll::runOnLoop(Loop *L, LPPassManager &LPM) {
if (TripCount != 1 && Size > UnrollThreshold) { if (TripCount != 1 && Size > UnrollThreshold) {
DEBUG(errs() << " Too large to fully unroll with count: " << Count DEBUG(errs() << " Too large to fully unroll with count: " << Count
<< " because size: " << Size << ">" << UnrollThreshold << "\n"); << " because size: " << Size << ">" << UnrollThreshold << "\n");
if (UnrollAllowPartial) { 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 // Reduce unroll count to be modulo of TripCount for partial unrolling
Count = UnrollThreshold / LoopSize; Count = UnrollThreshold / LoopSize;
while (Count != 0 && TripCount%Count != 0) { while (Count != 0 && TripCount%Count != 0) {
@@ -157,15 +159,8 @@ bool LoopUnroll::runOnLoop(Loop *L, LPPassManager &LPM) {
if (Count < 2) { if (Count < 2) {
DEBUG(errs() << " could not unroll partially\n"); DEBUG(errs() << " could not unroll partially\n");
return false; return false;
} else {
DEBUG(errs() << " partially unrolling with count: "
<< Count << "\n");
}
} else {
DEBUG(errs() << " will not try to unroll partially because "
<< "-unroll-allow-partial not given\n");
return false;
} }
DEBUG(errs() << " partially unrolling with count: " << Count << "\n");
} }
} }