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| author | Dan Gohman <gohman@apple.com> | 2009-06-27 22:58:27 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-06-27 22:58:27 +0000 |
| commit | 317f054531c9f09c08825f5db0b522532d1595af (patch) | |
| tree | 7e13908efe58c3e557c8ff47792c63049682e4d6 /llvm/lib/Transforms | |
| parent | ffdcba3dbdc3d87ef95e309fc158ee08c0edd0ed (diff) | |
| download | bcm5719-llvm-317f054531c9f09c08825f5db0b522532d1595af.tar.gz bcm5719-llvm-317f054531c9f09c08825f5db0b522532d1595af.zip | |
Don't try to split a loop when the controlling icmp instruction
doesn't have an IV-based operand. This fixes PR4471.
llvm-svn: 74399
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LoopIndexSplit.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/LoopIndexSplit.cpp b/llvm/lib/Transforms/Scalar/LoopIndexSplit.cpp index 6f7a7f866a8..ff0ec6d2ac6 100644 --- a/llvm/lib/Transforms/Scalar/LoopIndexSplit.cpp +++ b/llvm/lib/Transforms/Scalar/LoopIndexSplit.cpp @@ -258,6 +258,9 @@ bool LoopIndexSplit::runOnLoop(Loop *IncomingLoop, LPPassManager &LPM_Ref) { IVExitValue = ExitCondition->getOperand(0); if (!L->isLoopInvariant(IVExitValue)) return false; + if (!IVBasedValues.count( + ExitCondition->getOperand(IVExitValue == ExitCondition->getOperand(0)))) + return false; // If start value is more then exit value where induction variable // increments by 1 then we are potentially dealing with an infinite loop. |
