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| author | Chris Lattner <sabre@nondot.org> | 2009-11-27 08:40:14 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2009-11-27 08:40:14 +0000 |
| commit | 9763487bd50bd9927c8bbdcc84e4f7d59b8d9cdf (patch) | |
| tree | 68f0f26757350900f725c153bbf7fe5dddfd3ec1 /lib/Analysis/MemoryDependenceAnalysis.cpp | |
| parent | e95035aea481f70a6ea9183a7e133f8e9a98e073 (diff) | |
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90002 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/MemoryDependenceAnalysis.cpp')
| -rw-r--r-- | lib/Analysis/MemoryDependenceAnalysis.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/Analysis/MemoryDependenceAnalysis.cpp b/lib/Analysis/MemoryDependenceAnalysis.cpp index 0aacd1606c..f958e75040 100644 --- a/lib/Analysis/MemoryDependenceAnalysis.cpp +++ b/lib/Analysis/MemoryDependenceAnalysis.cpp @@ -1004,8 +1004,12 @@ getNonLocalPointerDepFromBB(Value *Pointer, uint64_t PointeeSize, Value *PredPtr = PHITranslatePointer(PtrInst, BB, Pred, TD); // If PHI translation fails, bail out. - if (PredPtr == 0) + if (PredPtr == 0) { + // FIXME: Instead of modelling this as a phi trans failure, we should + // model this as a clobber in the one predecessor. This will allow + // us to PRE values that are only available in some preds but not all. goto PredTranslationFailure; + } // Check to see if we have already visited this pred block with another // pointer. If so, we can't do this lookup. This failure can occur |