diff options
Diffstat (limited to 'lib/Transforms/IPO/GlobalOpt.cpp')
| -rw-r--r-- | lib/Transforms/IPO/GlobalOpt.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/Transforms/IPO/GlobalOpt.cpp b/lib/Transforms/IPO/GlobalOpt.cpp index ea8080e..7bed9e2 100644 --- a/lib/Transforms/IPO/GlobalOpt.cpp +++ b/lib/Transforms/IPO/GlobalOpt.cpp @@ -163,12 +163,15 @@ static bool AnalyzeGlobal(Value *V, GlobalStatus &GS, else if (GS.AccessingFunction != F) GS.HasMultipleAccessingFunctions = true; } - if (isa<LoadInst>(I)) { + if (LoadInst *LI = dyn_cast<LoadInst>(I)) { GS.isLoaded = true; + if (LI->isVolatile()) return true; // Don't hack on volatile loads. } else if (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->isVolatile()) return true; // Don't hack on volatile stores. + // 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 // stores. |