diff options
Diffstat (limited to 'backend/src/llvm/llvm_unroll.cpp')
| -rw-r--r-- | backend/src/llvm/llvm_unroll.cpp | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/backend/src/llvm/llvm_unroll.cpp b/backend/src/llvm/llvm_unroll.cpp index 7cd7c355..172e724c 100644 --- a/backend/src/llvm/llvm_unroll.cpp +++ b/backend/src/llvm/llvm_unroll.cpp @@ -163,19 +163,25 @@ namespace gbe { bool handleParentLoops(Loop *L, LPPassManager &LPM) { Loop *currL = L; ScalarEvolution *SE = &getAnalysis<ScalarEvolution>(); - BasicBlock *latchBlock = currL->getLoopLatch(); + BasicBlock *ExitBlock = currL->getLoopLatch(); + if (!ExitBlock || !L->isLoopExiting(ExitBlock)) + ExitBlock = currL->getExitingBlock(); + unsigned currTripCount = 0; bool shouldUnroll = true; - if (latchBlock) - currTripCount = SE->getSmallConstantTripCount(L, latchBlock); + if (ExitBlock) + currTripCount = SE->getSmallConstantTripCount(L, ExitBlock); while(currL) { Loop *parentL = currL->getParentLoop(); unsigned parentTripCount = 0; if (parentL) { - BasicBlock *parentLatchBlock = parentL->getLoopLatch(); - if (parentLatchBlock) - parentTripCount = SE->getSmallConstantTripCount(parentL, parentLatchBlock); + BasicBlock *parentExitBlock = parentL->getLoopLatch(); + if (!parentExitBlock || !parentL->isLoopExiting(parentExitBlock)) + parentExitBlock = parentL->getExitingBlock(); + + if (parentExitBlock) + parentTripCount = SE->getSmallConstantTripCount(parentL, parentExitBlock); } if ((parentTripCount != 0 && currTripCount / parentTripCount > 16) || (currTripCount > 32)) { |