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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 | f7ca1611e22d7b877ecfd444841f8c79deb5f9e4 (patch) | |
| tree | 95635e2e6a5d9766c306e7fa93667394dbe5b619 /lib/Transforms | |
| parent | a1baee20c4b042eca1f182fc003f38ab52efc7a9 (diff) | |
| download | external_llvm-f7ca1611e22d7b877ecfd444841f8c79deb5f9e4.zip external_llvm-f7ca1611e22d7b877ecfd444841f8c79deb5f9e4.tar.gz external_llvm-f7ca1611e22d7b877ecfd444841f8c79deb5f9e4.tar.bz2 | |
Don't try to split a loop when the controlling icmp instruction
doesn't have an IV-based operand. This fixes PR4471.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74399 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/Scalar/LoopIndexSplit.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/LoopIndexSplit.cpp b/lib/Transforms/Scalar/LoopIndexSplit.cpp index 6f7a7f8..ff0ec6d 100644 --- a/lib/Transforms/Scalar/LoopIndexSplit.cpp +++ b/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. |