diff options
Diffstat (limited to 'lib/Transforms/Scalar/LoopUnrollPass.cpp')
-rw-r--r-- | lib/Transforms/Scalar/LoopUnrollPass.cpp | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/LoopUnrollPass.cpp b/lib/Transforms/Scalar/LoopUnrollPass.cpp index de6b9952db..2a04af33d9 100644 --- a/lib/Transforms/Scalar/LoopUnrollPass.cpp +++ b/lib/Transforms/Scalar/LoopUnrollPass.cpp @@ -113,12 +113,13 @@ Pass *llvm::createLoopUnrollPass(int Threshold, int Count, int AllowPartial) { /// ApproximateLoopSize - Approximate the size of the loop. static unsigned ApproximateLoopSize(const Loop *L, unsigned &NumCalls, - const DataLayout *TD) { + bool &NotDuplicatable, const DataLayout *TD) { CodeMetrics Metrics; for (Loop::block_iterator I = L->block_begin(), E = L->block_end(); I != E; ++I) Metrics.analyzeBasicBlock(*I, TD); NumCalls = Metrics.NumInlineCandidates; + NotDuplicatable = Metrics.notDuplicatable; unsigned LoopSize = Metrics.NumInsts; @@ -181,8 +182,15 @@ bool LoopUnroll::runOnLoop(Loop *L, LPPassManager &LPM) { if (Threshold != NoThreshold) { const DataLayout *TD = getAnalysisIfAvailable<DataLayout>(); unsigned NumInlineCandidates; - unsigned LoopSize = ApproximateLoopSize(L, NumInlineCandidates, TD); + bool notDuplicatable; + unsigned LoopSize = ApproximateLoopSize(L, NumInlineCandidates, + notDuplicatable, TD); DEBUG(dbgs() << " Loop Size = " << LoopSize << "\n"); + if (notDuplicatable) { + DEBUG(dbgs() << " Not unrolling loop which contains non duplicatable" + << " instructions.\n"); + return false; + } if (NumInlineCandidates != 0) { DEBUG(dbgs() << " Not unrolling loop with inlinable calls.\n"); return false; |