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| author | Karthik Bhat <kv.bhat@samsung.com> | 2015-03-10 14:32:02 +0000 |
|---|---|---|
| committer | Karthik Bhat <kv.bhat@samsung.com> | 2015-03-10 14:32:02 +0000 |
| commit | 8d7f7eda1452b2d9c391aa096ae1bde4e15e8514 (patch) | |
| tree | 87566a48f0d614caa2eb4adf267acf4b166ee09c /llvm/lib/Analysis/DependenceAnalysis.cpp | |
| parent | 496059c8c9c0ab6f3c2f5c97fe40dfbde2abd575 (diff) | |
| download | bcm5719-llvm-8d7f7eda1452b2d9c391aa096ae1bde4e15e8514.tar.gz bcm5719-llvm-8d7f7eda1452b2d9c391aa096ae1bde4e15e8514.zip | |
Fix a memory corruption in Dependency Analysis.
This crash occurs due to memory corruption when trying to update dependency
direction based on Constraints.
This crash was observed during lnt regression of Polybench benchmark test case dynprog.
Review: http://reviews.llvm.org/D8059
llvm-svn: 231788
Diffstat (limited to 'llvm/lib/Analysis/DependenceAnalysis.cpp')
| -rw-r--r-- | llvm/lib/Analysis/DependenceAnalysis.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/DependenceAnalysis.cpp b/llvm/lib/Analysis/DependenceAnalysis.cpp index 3dcfcb839ad..3374b48c141 100644 --- a/llvm/lib/Analysis/DependenceAnalysis.cpp +++ b/llvm/lib/Analysis/DependenceAnalysis.cpp @@ -3651,6 +3651,8 @@ DependenceAnalysis::depends(Instruction *Src, Instruction *Dst, DEBUG(dbgs() << " updating\n"); for (int SJ = ConstrainedLevels.find_first(); SJ >= 0; SJ = ConstrainedLevels.find_next(SJ)) { + if (SJ > (int)CommonLevels) + break; updateDirection(Result.DV[SJ - 1], Constraints[SJ]); if (Result.DV[SJ - 1].Direction == Dependence::DVEntry::NONE) return nullptr; |
