diff options
| -rw-r--r-- | lib/Transforms/IPO/GlobalOpt.cpp | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/lib/Transforms/IPO/GlobalOpt.cpp b/lib/Transforms/IPO/GlobalOpt.cpp index 054c5ee430..b8edc32f16 100644 --- a/lib/Transforms/IPO/GlobalOpt.cpp +++ b/lib/Transforms/IPO/GlobalOpt.cpp @@ -155,14 +155,20 @@ static bool AnalyzeGlobal(Value *V, GlobalStatus &GS, // stores. if (GS.StoredType != GlobalStatus::isStored) if (GlobalVariable *GV = dyn_cast<GlobalVariable>(SI->getOperand(1))){ - if (SI->getOperand(0) == GV->getInitializer()) { + Value *StoredVal = SI->getOperand(0); + if (StoredVal == GV->getInitializer()) { + if (GS.StoredType < GlobalStatus::isInitializerStored) + GS.StoredType = GlobalStatus::isInitializerStored; + } else if (isa<LoadInst>(StoredVal) && + cast<LoadInst>(StoredVal)->getOperand(0) == GV) { + // G = G if (GS.StoredType < GlobalStatus::isInitializerStored) GS.StoredType = GlobalStatus::isInitializerStored; } else if (GS.StoredType < GlobalStatus::isStoredOnce) { GS.StoredType = GlobalStatus::isStoredOnce; - GS.StoredOnceValue = SI->getOperand(0); + GS.StoredOnceValue = StoredVal; } else if (GS.StoredType == GlobalStatus::isStoredOnce && - GS.StoredOnceValue == SI->getOperand(0)) { + GS.StoredOnceValue == StoredVal) { // noop. } else { GS.StoredType = GlobalStatus::isStored; |