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Fix 2004-10-10-CastStoreOnce.llx, by adjusting types back if we strip off a cast
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16878 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -447,27 +447,30 @@ static bool OptimizeOnceStoredGlobal(GlobalVariable *GV, Value *StoredOnceVal) {
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// initializer. Instead, replace all of the loads with the stored value.
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if (isa<PointerType>(GV->getInitializer()->getType()) &&
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GV->getInitializer()->isNullValue()) {
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if (isa<Constant>(StoredOnceVal) &&
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AllUsesOfLoadedValueWillTrapIfNull(GV)) {
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DEBUG(std::cerr << "REPLACING STORED GLOBAL POINTER: " << *GV);
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if (Constant *SOVC = dyn_cast<Constant>(StoredOnceVal))
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if (AllUsesOfLoadedValueWillTrapIfNull(GV)) {
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DEBUG(std::cerr << "REPLACING STORED GLOBAL POINTER: " << *GV);
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//std::cerr << " Stored Value: " << *StoredOnceVal << "\n";
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if (GV->getInitializer()->getType() != SOVC->getType())
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SOVC = ConstantExpr::getCast(SOVC, GV->getInitializer()->getType());
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// Replace all uses of loads with uses of uses of the stored value.
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while (!GV->use_empty())
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if (LoadInst *LI = dyn_cast<LoadInst>(GV->use_back())) {
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LI->replaceAllUsesWith(StoredOnceVal);
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LI->getParent()->getInstList().erase(LI); // Nuke the load.
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} else if (StoreInst *SI = dyn_cast<StoreInst>(GV->use_back())) {
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SI->getParent()->getInstList().erase(SI); // Nuke the store
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} else {
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assert(0 && "Unknown user of stored once global!");
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}
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//std::cerr << " Stored Value: " << *SOVC << "\n";
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// Nuke the now-dead global.
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GV->getParent()->getGlobalList().erase(GV);
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return true;
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}
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// Replace all uses of loads with uses of uses of the stored value.
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while (!GV->use_empty())
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if (LoadInst *LI = dyn_cast<LoadInst>(GV->use_back())) {
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LI->replaceAllUsesWith(SOVC);
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LI->getParent()->getInstList().erase(LI); // Nuke the load.
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} else if (StoreInst *SI = dyn_cast<StoreInst>(GV->use_back())) {
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SI->getParent()->getInstList().erase(SI); // Nuke the store
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} else {
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assert(0 && "Unknown user of stored once global!");
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}
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// Nuke the now-dead global.
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GV->getParent()->getGlobalList().erase(GV);
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return true;
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}
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//if (isa<MallocInst>(StoredOnceValue))
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}
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return false;
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