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| author | Dan Gohman <gohman@apple.com> | 2010-02-18 23:26:33 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2010-02-18 23:26:33 +0000 |
| commit | aa11defd1c66dbde0c757c99791c4ae4d740fc3e (patch) | |
| tree | a8b39fb2b0d7b3248227a27ac9c24db838ac7567 /include | |
| parent | 1c40e188c579c49f811eee499af2f371298c758c (diff) | |
| download | llvm-aa11defd1c66dbde0c757c99791c4ae4d740fc3e.tar.gz llvm-aa11defd1c66dbde0c757c99791c4ae4d740fc3e.tar.bz2 llvm-aa11defd1c66dbde0c757c99791c4ae4d740fc3e.tar.xz | |
Indvars needs to explicitly notify ScalarEvolution when it is replacing
a loop exit value, so that if a loop gets deleted, ScalarEvolution
isn't stick holding on to dangling SCEVAddRecExprs for that loop. This
fixes PR6339.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96626 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include')
| -rw-r--r-- | include/llvm/Analysis/ScalarEvolution.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/llvm/Analysis/ScalarEvolution.h b/include/llvm/Analysis/ScalarEvolution.h index 383ee88ad2..af5d10e6b7 100644 --- a/include/llvm/Analysis/ScalarEvolution.h +++ b/include/llvm/Analysis/ScalarEvolution.h @@ -586,6 +586,11 @@ namespace llvm { /// compute a trip count, or if the loop is deleted. void forgetLoop(const Loop *L); + /// forgetValue - This method should be called by the client when it has + /// changed a value in a way that may effect its value, or which may + /// disconnect it from a def-use chain linking it to a loop. + void forgetValue(Value *V); + /// GetMinTrailingZeros - Determine the minimum number of zero bits that S /// is guaranteed to end in (at every loop iteration). It is, at the same /// time, the minimum number of times S is divisible by 2. For example, |