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Add some ifdef'd out debug info 

llvm-svn: 30676
This commit is contained in:
Chris Lattner 2006-09-30 19:40:30 +00:00
parent eb45775347
commit 80a01ef6f0
1 changed files with 30 additions and 3 deletions
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33
llvm/lib/Transforms/IPO/GlobalOpt.cpp
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@ -831,6 +831,10 @@ static bool OptimizeOnceStoredGlobal(GlobalVariable *GV, Value *StoredOnceVal,
if (OptimizeAwayTrappingUsesOfLoads(GV, SOVC))
return true;
} else if (MallocInst *MI = dyn_cast<MallocInst>(StoredOnceVal)) {
// If this is a malloc of an abstract type, don't touch it.
if (!MI->getAllocatedType()->isSized())
return false;
// If we have a global that is only initialized with a fixed size malloc,
// and if all users of the malloc trap, and if the malloc'd address is not
// put anywhere else, transform the program to use global memory instead
@ -839,9 +843,8 @@ static bool OptimizeOnceStoredGlobal(GlobalVariable *GV, Value *StoredOnceVal,
// that we restrict this transformation to only working on small
// allocations (2048 bytes currently), as we don't want to introduce a 16M
// global or something.
if (ConstantInt *NElements = dyn_cast<ConstantInt>(MI->getArraySize()))
if (MI->getAllocatedType()->isSized() &&
NElements->getRawValue()*
if (ConstantInt *NElements = dyn_cast<ConstantInt>(MI->getArraySize())) {
if (NElements->getRawValue()*
TD.getTypeSize(MI->getAllocatedType()) < 2048 &&
AllUsesOfLoadedValueWillTrapIfNull(GV) &&
ValueIsOnlyUsedLocallyOrStoredToOneGlobal(MI, GV)) {
@ -850,6 +853,7 @@ static bool OptimizeOnceStoredGlobal(GlobalVariable *GV, Value *StoredOnceVal,
}
}
}
}
return false;
}
@ -938,6 +942,28 @@ bool GlobalOpt::ProcessInternalGlobal(GlobalVariable *GV,
}
if (!AnalyzeGlobal(GV, GS, PHIUsers)) {
#if 0
std::cerr << "Global: " << *GV;
std::cerr << " isLoaded = " << GS.isLoaded << "\n";
std::cerr << " StoredType = ";
switch (GS.StoredType) {
case GlobalStatus::NotStored: std::cerr << "NEVER STORED\n"; break;
case GlobalStatus::isInitializerStored: std::cerr << "INIT STORED\n"; break;
case GlobalStatus::isStoredOnce: std::cerr << "STORED ONCE\n"; break;
case GlobalStatus::isStored: std::cerr << "stored\n"; break;
}
if (GS.StoredType == GlobalStatus::isStoredOnce && GS.StoredOnceValue)
std::cerr << " StoredOnceValue = " << *GS.StoredOnceValue << "\n";
if (GS.AccessingFunction && !GS.HasMultipleAccessingFunctions)
std::cerr << " AccessingFunction = " << GS.AccessingFunction->getName()
<< "\n";
std::cerr << " HasMultipleAccessingFunctions = "
<< GS.HasMultipleAccessingFunctions << "\n";
std::cerr << " HasNonInstructionUser = " << GS.HasNonInstructionUser<<"\n";
std::cerr << " isNotSuitableForSRA = " << GS.isNotSuitableForSRA << "\n";
std::cerr << "\n";
#endif
// 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
@ -963,6 +989,7 @@ bool GlobalOpt::ProcessInternalGlobal(GlobalVariable *GV,
++NumLocalized;
return true;
}
// If the global is never loaded (but may be stored to), it is dead.
// Delete it now.
if (!GS.isLoaded) {