Misc analysis passes that need to be aware of atomic load/store.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137650 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/LoopDependenceAnalysis.cpp b/lib/Analysis/LoopDependenceAnalysis.cpp
index c1afe8f..3997ac4 100644
--- a/lib/Analysis/LoopDependenceAnalysis.cpp
+++ b/lib/Analysis/LoopDependenceAnalysis.cpp
@@ -76,7 +76,13 @@
}
static bool IsLoadOrStoreInst(Value *I) {
- return isa<LoadInst>(I) || isa<StoreInst>(I);
+ // Returns true if the load or store can be analyzed. Atomic and volatile
+ // operations have properties which this analysis does not understand.
+ if (LoadInst *LI = dyn_cast<LoadInst>(I))
+ return LI->isUnordered();
+ else if (StoreInst *SI = dyn_cast<StoreInst>(I))
+ return SI->isUnordered();
+ return false;
}
static Value *GetPointerOperand(Value *I) {