mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-16 11:05:54 +00:00
Reduce indentation and remove commented out code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123729 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
parent
72d1695f12
commit
daad56a8e3
@ -1704,140 +1704,119 @@ bool GlobalOpt::ProcessInternalGlobal(GlobalVariable *GV,
|
||||
return true;
|
||||
}
|
||||
|
||||
if (!AnalyzeGlobal(GV, GS, PHIUsers)) {
|
||||
#if 0
|
||||
DEBUG(dbgs() << "Global: " << *GV);
|
||||
DEBUG(dbgs() << " isLoaded = " << GS.isLoaded << "\n");
|
||||
DEBUG(dbgs() << " StoredType = ");
|
||||
switch (GS.StoredType) {
|
||||
case GlobalStatus::NotStored: DEBUG(dbgs() << "NEVER STORED\n"); break;
|
||||
case GlobalStatus::isInitializerStored: DEBUG(dbgs() << "INIT STORED\n");
|
||||
break;
|
||||
case GlobalStatus::isStoredOnce: DEBUG(dbgs() << "STORED ONCE\n"); break;
|
||||
case GlobalStatus::isStored: DEBUG(dbgs() << "stored\n"); break;
|
||||
}
|
||||
if (GS.StoredType == GlobalStatus::isStoredOnce && GS.StoredOnceValue)
|
||||
DEBUG(dbgs() << " StoredOnceValue = " << *GS.StoredOnceValue << "\n");
|
||||
if (GS.AccessingFunction && !GS.HasMultipleAccessingFunctions)
|
||||
DEBUG(dbgs() << " AccessingFunction = "
|
||||
<< GS.AccessingFunction->getName() << "\n");
|
||||
DEBUG(dbgs() << " HasMultipleAccessingFunctions = "
|
||||
<< GS.HasMultipleAccessingFunctions << "\n");
|
||||
DEBUG(dbgs() << " HasNonInstructionUser = "
|
||||
<< GS.HasNonInstructionUser<<"\n");
|
||||
DEBUG(dbgs() << "\n");
|
||||
#endif
|
||||
if (AnalyzeGlobal(GV, GS, PHIUsers))
|
||||
return false;
|
||||
|
||||
// If this is a first class global and has only one accessing function
|
||||
// and this function is main (which we know is not recursive we can make
|
||||
// this global a local variable) we replace the global with a local alloca
|
||||
// in this function.
|
||||
//
|
||||
// NOTE: It doesn't make sense to promote non single-value types since we
|
||||
// are just replacing static memory to stack memory.
|
||||
//
|
||||
// If the global is in different address space, don't bring it to stack.
|
||||
if (!GS.HasMultipleAccessingFunctions &&
|
||||
GS.AccessingFunction && !GS.HasNonInstructionUser &&
|
||||
GV->getType()->getElementType()->isSingleValueType() &&
|
||||
GS.AccessingFunction->getName() == "main" &&
|
||||
GS.AccessingFunction->hasExternalLinkage() &&
|
||||
GV->getType()->getAddressSpace() == 0) {
|
||||
DEBUG(dbgs() << "LOCALIZING GLOBAL: " << *GV);
|
||||
Instruction& FirstI = const_cast<Instruction&>(*GS.AccessingFunction
|
||||
->getEntryBlock().begin());
|
||||
const Type* ElemTy = GV->getType()->getElementType();
|
||||
// FIXME: Pass Global's alignment when globals have alignment
|
||||
AllocaInst* Alloca = new AllocaInst(ElemTy, NULL, GV->getName(), &FirstI);
|
||||
if (!isa<UndefValue>(GV->getInitializer()))
|
||||
new StoreInst(GV->getInitializer(), Alloca, &FirstI);
|
||||
// If this is a first class global and has only one accessing function
|
||||
// and this function is main (which we know is not recursive we can make
|
||||
// this global a local variable) we replace the global with a local alloca
|
||||
// in this function.
|
||||
//
|
||||
// NOTE: It doesn't make sense to promote non single-value types since we
|
||||
// are just replacing static memory to stack memory.
|
||||
//
|
||||
// If the global is in different address space, don't bring it to stack.
|
||||
if (!GS.HasMultipleAccessingFunctions &&
|
||||
GS.AccessingFunction && !GS.HasNonInstructionUser &&
|
||||
GV->getType()->getElementType()->isSingleValueType() &&
|
||||
GS.AccessingFunction->getName() == "main" &&
|
||||
GS.AccessingFunction->hasExternalLinkage() &&
|
||||
GV->getType()->getAddressSpace() == 0) {
|
||||
DEBUG(dbgs() << "LOCALIZING GLOBAL: " << *GV);
|
||||
Instruction& FirstI = const_cast<Instruction&>(*GS.AccessingFunction
|
||||
->getEntryBlock().begin());
|
||||
const Type* ElemTy = GV->getType()->getElementType();
|
||||
// FIXME: Pass Global's alignment when globals have alignment
|
||||
AllocaInst* Alloca = new AllocaInst(ElemTy, NULL, GV->getName(), &FirstI);
|
||||
if (!isa<UndefValue>(GV->getInitializer()))
|
||||
new StoreInst(GV->getInitializer(), Alloca, &FirstI);
|
||||
|
||||
GV->replaceAllUsesWith(Alloca);
|
||||
GV->eraseFromParent();
|
||||
++NumLocalized;
|
||||
return true;
|
||||
}
|
||||
|
||||
// If the global is never loaded (but may be stored to), it is dead.
|
||||
// Delete it now.
|
||||
if (!GS.isLoaded) {
|
||||
DEBUG(dbgs() << "GLOBAL NEVER LOADED: " << *GV);
|
||||
|
||||
// Delete any stores we can find to the global. We may not be able to
|
||||
// make it completely dead though.
|
||||
bool Changed = CleanupConstantGlobalUsers(GV, GV->getInitializer());
|
||||
|
||||
// If the global is dead now, delete it.
|
||||
if (GV->use_empty()) {
|
||||
GV->eraseFromParent();
|
||||
++NumDeleted;
|
||||
Changed = true;
|
||||
}
|
||||
return Changed;
|
||||
|
||||
} else if (GS.StoredType <= GlobalStatus::isInitializerStored) {
|
||||
DEBUG(dbgs() << "MARKING CONSTANT: " << *GV);
|
||||
GV->setConstant(true);
|
||||
|
||||
// Clean up any obviously simplifiable users now.
|
||||
CleanupConstantGlobalUsers(GV, GV->getInitializer());
|
||||
|
||||
// If the global is dead now, just nuke it.
|
||||
if (GV->use_empty()) {
|
||||
DEBUG(dbgs() << " *** Marking constant allowed us to simplify "
|
||||
<< "all users and delete global!\n");
|
||||
GV->eraseFromParent();
|
||||
++NumDeleted;
|
||||
}
|
||||
|
||||
++NumMarked;
|
||||
return true;
|
||||
} else if (!GV->getInitializer()->getType()->isSingleValueType()) {
|
||||
if (TargetData *TD = getAnalysisIfAvailable<TargetData>())
|
||||
if (GlobalVariable *FirstNewGV = SRAGlobal(GV, *TD)) {
|
||||
GVI = FirstNewGV; // Don't skip the newly produced globals!
|
||||
return true;
|
||||
}
|
||||
} else if (GS.StoredType == GlobalStatus::isStoredOnce) {
|
||||
// If the initial value for the global was an undef value, and if only
|
||||
// one other value was stored into it, we can just change the
|
||||
// initializer to be the stored value, then delete all stores to the
|
||||
// global. This allows us to mark it constant.
|
||||
if (Constant *SOVConstant = dyn_cast<Constant>(GS.StoredOnceValue))
|
||||
if (isa<UndefValue>(GV->getInitializer())) {
|
||||
// Change the initial value here.
|
||||
GV->setInitializer(SOVConstant);
|
||||
|
||||
// Clean up any obviously simplifiable users now.
|
||||
CleanupConstantGlobalUsers(GV, GV->getInitializer());
|
||||
|
||||
if (GV->use_empty()) {
|
||||
DEBUG(dbgs() << " *** Substituting initializer allowed us to "
|
||||
<< "simplify all users and delete global!\n");
|
||||
GV->eraseFromParent();
|
||||
++NumDeleted;
|
||||
} else {
|
||||
GVI = GV;
|
||||
}
|
||||
++NumSubstitute;
|
||||
return true;
|
||||
}
|
||||
|
||||
// Try to optimize globals based on the knowledge that only one value
|
||||
// (besides its initializer) is ever stored to the global.
|
||||
if (OptimizeOnceStoredGlobal(GV, GS.StoredOnceValue, GVI,
|
||||
getAnalysisIfAvailable<TargetData>()))
|
||||
return true;
|
||||
|
||||
// Otherwise, if the global was not a boolean, we can shrink it to be a
|
||||
// boolean.
|
||||
if (Constant *SOVConstant = dyn_cast<Constant>(GS.StoredOnceValue))
|
||||
if (TryToShrinkGlobalToBoolean(GV, SOVConstant)) {
|
||||
++NumShrunkToBool;
|
||||
return true;
|
||||
}
|
||||
}
|
||||
GV->replaceAllUsesWith(Alloca);
|
||||
GV->eraseFromParent();
|
||||
++NumLocalized;
|
||||
return true;
|
||||
}
|
||||
|
||||
// If the global is never loaded (but may be stored to), it is dead.
|
||||
// Delete it now.
|
||||
if (!GS.isLoaded) {
|
||||
DEBUG(dbgs() << "GLOBAL NEVER LOADED: " << *GV);
|
||||
|
||||
// Delete any stores we can find to the global. We may not be able to
|
||||
// make it completely dead though.
|
||||
bool Changed = CleanupConstantGlobalUsers(GV, GV->getInitializer());
|
||||
|
||||
// If the global is dead now, delete it.
|
||||
if (GV->use_empty()) {
|
||||
GV->eraseFromParent();
|
||||
++NumDeleted;
|
||||
Changed = true;
|
||||
}
|
||||
return Changed;
|
||||
|
||||
} else if (GS.StoredType <= GlobalStatus::isInitializerStored) {
|
||||
DEBUG(dbgs() << "MARKING CONSTANT: " << *GV);
|
||||
GV->setConstant(true);
|
||||
|
||||
// Clean up any obviously simplifiable users now.
|
||||
CleanupConstantGlobalUsers(GV, GV->getInitializer());
|
||||
|
||||
// If the global is dead now, just nuke it.
|
||||
if (GV->use_empty()) {
|
||||
DEBUG(dbgs() << " *** Marking constant allowed us to simplify "
|
||||
<< "all users and delete global!\n");
|
||||
GV->eraseFromParent();
|
||||
++NumDeleted;
|
||||
}
|
||||
|
||||
++NumMarked;
|
||||
return true;
|
||||
} else if (!GV->getInitializer()->getType()->isSingleValueType()) {
|
||||
if (TargetData *TD = getAnalysisIfAvailable<TargetData>())
|
||||
if (GlobalVariable *FirstNewGV = SRAGlobal(GV, *TD)) {
|
||||
GVI = FirstNewGV; // Don't skip the newly produced globals!
|
||||
return true;
|
||||
}
|
||||
} else if (GS.StoredType == GlobalStatus::isStoredOnce) {
|
||||
// If the initial value for the global was an undef value, and if only
|
||||
// one other value was stored into it, we can just change the
|
||||
// initializer to be the stored value, then delete all stores to the
|
||||
// global. This allows us to mark it constant.
|
||||
if (Constant *SOVConstant = dyn_cast<Constant>(GS.StoredOnceValue))
|
||||
if (isa<UndefValue>(GV->getInitializer())) {
|
||||
// Change the initial value here.
|
||||
GV->setInitializer(SOVConstant);
|
||||
|
||||
// Clean up any obviously simplifiable users now.
|
||||
CleanupConstantGlobalUsers(GV, GV->getInitializer());
|
||||
|
||||
if (GV->use_empty()) {
|
||||
DEBUG(dbgs() << " *** Substituting initializer allowed us to "
|
||||
<< "simplify all users and delete global!\n");
|
||||
GV->eraseFromParent();
|
||||
++NumDeleted;
|
||||
} else {
|
||||
GVI = GV;
|
||||
}
|
||||
++NumSubstitute;
|
||||
return true;
|
||||
}
|
||||
|
||||
// Try to optimize globals based on the knowledge that only one value
|
||||
// (besides its initializer) is ever stored to the global.
|
||||
if (OptimizeOnceStoredGlobal(GV, GS.StoredOnceValue, GVI,
|
||||
getAnalysisIfAvailable<TargetData>()))
|
||||
return true;
|
||||
|
||||
// Otherwise, if the global was not a boolean, we can shrink it to be a
|
||||
// boolean.
|
||||
if (Constant *SOVConstant = dyn_cast<Constant>(GS.StoredOnceValue))
|
||||
if (TryToShrinkGlobalToBoolean(GV, SOVConstant)) {
|
||||
++NumShrunkToBool;
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user