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| author | Kostya Serebryany <kcc@google.com> | 2013-02-13 05:59:45 +0000 |
|---|---|---|
| committer | Kostya Serebryany <kcc@google.com> | 2013-02-13 05:59:45 +0000 |
| commit | 7bce462c15356229e13d78d14560feaac30a0f5f (patch) | |
| tree | 4426fc08f412f83fd764e736500b7c694ca9b969 /lib/Analysis | |
| parent | 39f02940ba085af79011f7e9095bf9902cd0fa6f (diff) | |
| download | external_llvm-7bce462c15356229e13d78d14560feaac30a0f5f.zip external_llvm-7bce462c15356229e13d78d14560feaac30a0f5f.tar.gz external_llvm-7bce462c15356229e13d78d14560feaac30a0f5f.tar.bz2 | |
[tsan] disable load widening in ThreadSanitizer mode
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175034 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis')
| -rw-r--r-- | lib/Analysis/MemoryDependenceAnalysis.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Analysis/MemoryDependenceAnalysis.cpp b/lib/Analysis/MemoryDependenceAnalysis.cpp index 5cb0016..9a1edc7 100644 --- a/lib/Analysis/MemoryDependenceAnalysis.cpp +++ b/lib/Analysis/MemoryDependenceAnalysis.cpp @@ -283,6 +283,12 @@ getLoadLoadClobberFullWidthSize(const Value *MemLocBase, int64_t MemLocOffs, const DataLayout &TD) { // We can only extend simple integer loads. if (!isa<IntegerType>(LI->getType()) || !LI->isSimple()) return 0; + + // Load widening is hostile to ThreadSanitizer: it may cause false positives + // or make the reports more cryptic (access sizes are wrong). + if (LI->getParent()->getParent()->getAttributes(). + hasAttribute(AttributeSet::FunctionIndex, Attribute::ThreadSafety)) + return 0; // Get the base of this load. int64_t LIOffs = 0; |