diff options
Diffstat (limited to 'lib/Transforms/IPO/GlobalOpt.cpp')
| -rw-r--r-- | lib/Transforms/IPO/GlobalOpt.cpp | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/lib/Transforms/IPO/GlobalOpt.cpp b/lib/Transforms/IPO/GlobalOpt.cpp index 6904b7c611..80b11ed792 100644 --- a/lib/Transforms/IPO/GlobalOpt.cpp +++ b/lib/Transforms/IPO/GlobalOpt.cpp @@ -195,12 +195,14 @@ static bool AnalyzeGlobal(const Value *V, GlobalStatus &GS, } if (const LoadInst *LI = dyn_cast<LoadInst>(I)) { GS.isLoaded = true; - if (!LI->isSimple()) return true; // Don't hack on volatile loads. + // Don't hack on volatile/atomic loads. + if (!LI->isSimple()) return true; } else if (const StoreInst *SI = dyn_cast<StoreInst>(I)) { // Don't allow a store OF the address, only stores TO the address. if (SI->getOperand(0) == V) return true; - if (!SI->isSimple()) return true; // Don't hack on volatile stores. + // Don't hack on volatile/atomic stores. + if (!SI->isSimple()) return true; // If this is a direct store to the global (i.e., the global is a scalar // value, not an aggregate), keep more specific information about @@ -2333,7 +2335,7 @@ static bool EvaluateFunction(Function *F, Constant *&RetVal, Constant *InstResult = 0; if (StoreInst *SI = dyn_cast<StoreInst>(CurInst)) { - if (!SI->isSimple()) return false; // no volatile accesses. + if (!SI->isSimple()) return false; // no volatile/atomic accesses. Constant *Ptr = getVal(Values, SI->getOperand(1)); if (!isSimpleEnoughPointerToCommit(Ptr)) // If this is too complex for us to commit, reject it. @@ -2410,7 +2412,7 @@ static bool EvaluateFunction(Function *F, Constant *&RetVal, ConstantExpr::getGetElementPtr(P, GEPOps, cast<GEPOperator>(GEP)->isInBounds()); } else if (LoadInst *LI = dyn_cast<LoadInst>(CurInst)) { - if (!LI->isSimple()) return false; // no volatile accesses. + if (!LI->isSimple()) return false; // no volatile/atomic accesses. InstResult = ComputeLoadResult(getVal(Values, LI->getOperand(0)), MutatedMemory); if (InstResult == 0) return false; // Could not evaluate load. |