LLVM: lib/Transforms/IPO/GlobalOpt.cpp File Reference (original) (raw)

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◆ DEBUG_TYPE

#define DEBUG_TYPE "globalopt"

◆ ChangeableCCCacheTy

◆ allUsesOfLoadAndStores()

◆ allUsesOfLoadedValueWillTrapIfNull()

◆ AllUsesOfValueWillTrapIfNull()

Return true if all users of the specified value will trap if the value is dynamically null.

PHIs keeps track of any phi nodes we've seen to avoid reprocessing them.

Definition at line 664 of file GlobalOpt.cpp.

References AllUsesOfValueWillTrapIfNull(), assert(), llvm::cast(), llvm::dyn_cast(), I, II, llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::isa(), llvm::CmpInst::isSigned(), llvm::NullPointerIsDefined(), and llvm::Value::users().

Referenced by allUsesOfLoadedValueWillTrapIfNull(), and AllUsesOfValueWillTrapIfNull().

◆ ChangeCalleesToFastCall()

◆ changeCallSitesToColdCC()

◆ CleanupConstantGlobalUsers()

We just marked GV constant.

Loop over all users of the global, cleaning up the obvious ones. This is largely just a quick scan over the use list to clean up the easy and obvious cruft. This returns true if it made a change.

Definition at line 281 of file GlobalOpt.cpp.

References llvm::append_range(), Changed, llvm::ConstantFoldLoadFromConst(), llvm::ConstantFoldLoadFromUniformValue(), DL, llvm::dyn_cast(), llvm::SmallVectorTemplateCommon< T, typename >::empty(), GEP, llvm::GlobalVariable::getInitializer(), llvm::Value::getType(), llvm::getUnderlyingObject(), I, II, llvm::SmallPtrSetImpl< PtrType >::insert(), MI, llvm::Offset, llvm::SmallVectorImpl< T >::pop_back_val(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::RecursivelyDeleteTriviallyDeadInstructionsPermissive(), llvm::Constant::removeDeadConstantUsers(), llvm::Value::stripAndAccumulateConstantOffsets(), and llvm::Value::users().

Referenced by OptimizeAwayTrappingUsesOfLoads(), and processInternalGlobal().

◆ CleanupPointerRootUsers()

This GV is a pointer root.

Loop over all users of the global and clean up any that obviously don't assign the global a value that isn't dynamically allocated.

Definition at line 203 of file GlobalOpt.cpp.

References llvm::append_range(), Changed, llvm::dyn_cast(), llvm::SmallVectorTemplateCommon< T, typename >::empty(), I, llvm::isa(), llvm::isAllocationFn(), llvm::GlobalVariable::isConstant(), IsSafeComputationToRemove(), llvm::SmallVectorImpl< T >::pop_back_val(), llvm::Constant::removeDeadConstantUsers(), and llvm::Value::users().

Referenced by OptimizeAwayTrappingUsesOfLoads(), and processInternalGlobal().

◆ collectSRATypes()

Look at all uses of the global and determine which (offset, type) pairs it can be split into.

Definition at line 360 of file GlobalOpt.cpp.

References llvm::CallingConv::C, llvm::ConstantFoldLoadFromConst(), llvm::dbgs(), DL, llvm::dyn_cast(), llvm::SmallVectorTemplateCommon< T, typename >::empty(), GEP, llvm::GlobalVariable::getInitializer(), llvm::getLoadStorePointerOperand(), llvm::getLoadStoreType(), llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::isa(), llvm::isSafeToDestroyConstant(), LLVM_DEBUG, llvm::Offset, llvm::SmallVectorImpl< T >::pop_back_val(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::try_emplace(), and llvm::Value::uses().

Referenced by SRAGlobal().

◆ collectVersions()

◆ compareNames()

◆ ConstantPropUsersOf()

◆ DeleteDeadIFuncs()

◆ deleteIfDead()

Definition at line 1331 of file GlobalOpt.cpp.

References llvm::CallingConv::C, llvm::SmallPtrSetImpl< PtrType >::count(), llvm::dbgs(), llvm::dyn_cast(), llvm::GlobalValue::eraseFromParent(), F, llvm::GlobalValue::getComdat(), llvm::GlobalValue::hasLocalLinkage(), llvm::GlobalValue::isDeclaration(), llvm::GlobalValue::isDiscardableIfUnused(), LLVM_DEBUG, llvm::Constant::removeDeadConstantUsers(), llvm::ReplaceableMetadataImpl::SalvageDebugInfo(), and llvm::Value::use_empty().

Referenced by DeleteDeadIFuncs(), OptimizeFunctions(), OptimizeGlobalAliases(), and OptimizeGlobalVars().

◆ EvaluateStaticConstructor()

◆ FindAtExitLibFunc()

◆ forwardStoredOnceStore()

Definition at line 1431 of file GlobalOpt.cpp.

References llvm::dyn_cast(), llvm::SmallVectorTemplateCommon< T, typename >::empty(), F, llvm::Instruction::getFunction(), llvm::Value::getType(), llvm::StoreInst::getValueOperand(), llvm::isa(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::Value::users().

Referenced by processInternalGlobal().

◆ hasChangeableCC()

◆ hasChangeableCCImpl()

◆ hasInvokeCallers()

◆ hasMustTailCallers()

◆ hasOnlyColdCalls()

◆ hasSideeffectFreeStaticResolution()

◆ hasUseOtherThanLLVMUsed()

◆ hasUsesToReplace()

◆ isColdCallSite()

◆ IsEmptyAtExitFunction()

◆ isLeakCheckerRoot()

Is this global variable possibly used by a leak checker as a root?

If so, we might not really want to eliminate the stores to it.

Definition at line 122 of file GlobalOpt.cpp.

References llvm::Type::ArrayTyID, llvm::cast(), llvm::StructType::elements(), llvm::Type::FixedVectorTyID, llvm::GlobalValue::getValueType(), llvm::GlobalValue::hasPrivateLinkage(), llvm::isa(), llvm::StructType::isOpaque(), llvm::isPointerTy(), llvm::Type::PointerTyID, llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::Type::ScalableVectorTyID, and llvm::Type::StructTyID.

Referenced by OptimizeAwayTrappingUsesOfLoads(), and processInternalGlobal().

◆ isPointerValueDeadOnEntryToFunction()

Definition at line 1362 of file GlobalOpt.cpp.

References assert(), DL, llvm::dyn_cast(), F, llvm::GlobalValue::getDataLayout(), llvm::Value::getType(), llvm::StoreInst::getValueOperand(), I, llvm::none_of(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::SmallVectorTemplateCommon< T, typename >::size(), and llvm::Value::users().

Referenced by processInternalGlobal().

◆ IsSafeComputationToRemove()

◆ isValidCandidateForColdCC()

◆ mayHaveOtherReferences()

◆ OptimizeAwayTrappingUsesOfLoads()

The specified global has only one non-null value stored into it.

If there are uses of the loaded value that would trap if the loaded value is dynamically null, then we know that they cannot be reachable with a null optimize away the load.

Definition at line 841 of file GlobalOpt.cpp.

References assert(), Changed, CleanupConstantGlobalUsers(), CleanupPointerRootUsers(), llvm::dbgs(), DL, llvm::dyn_cast(), llvm::GlobalVariable::eraseFromParent(), llvm::isa(), isLeakCheckerRoot(), LLVM_DEBUG, llvm::make_early_inc_range(), OptimizeAwayTrappingUsesOfValue(), llvm::Value::use_empty(), and llvm::Value::users().

Referenced by optimizeOnceStoredGlobal().

◆ OptimizeAwayTrappingUsesOfValue()

Definition at line 771 of file GlobalOpt.cpp.

References llvm::CallBase::arg_size(), llvm::CallingConv::C, llvm::cast(), Changed, llvm::dyn_cast(), E(), llvm::ConstantExpr::getAddrSpaceCast(), llvm::CallBase::getArgOperand(), llvm::CallBase::getCalledOperand(), llvm::ConstantExpr::getGetElementPtr(), llvm::Value::getType(), I, llvm::isa(), llvm::NullPointerIsDefined(), OptimizeAwayTrappingUsesOfValue(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::SmallVectorImpl< T >::reserve(), llvm::CallBase::setArgOperand(), llvm::CallBase::setCalledOperand(), and llvm::SmallVectorTemplateCommon< T, typename >::size().

Referenced by OptimizeAwayTrappingUsesOfLoads(), and OptimizeAwayTrappingUsesOfValue().

◆ OptimizeEmptyGlobalAtExitDtors()

Itanium C++ ABI p3.3.5:

After constructing a global (or local static) object, that will require destruction on exit, a termination function is registered as follows:

extern "C" int __cxa_atexit ( void (*f)(void *), void *p, void *d );

This registration, e.g. __cxa_atexit(f,p,d), is intended to cause the call f(p) when DSO d is unloaded, before all such termination calls registered before this one. It returns zero if registration is successful, nonzero on failure.

Definition at line 2395 of file GlobalOpt.cpp.

References Changed, llvm::dyn_cast(), llvm::Instruction::eraseFromParent(), llvm::CallBase::getArgOperand(), llvm::Constant::getNullValue(), llvm::Value::getType(), IsEmptyAtExitFunction(), llvm::make_early_inc_range(), llvm::Value::replaceAllUsesWith(), llvm::Value::stripPointerCasts(), and llvm::Value::users().

Referenced by optimizeGlobalsInModule().

◆ OptimizeFunctions()

Definition at line 1930 of file GlobalOpt.cpp.

References ChangeCalleesToFastCall(), changeCallSitesToColdCC(), Changed, llvm::CallingConv::Cold, deleteIfDead(), EnableColdCCStressTest, llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::erase(), F, llvm::CallingConv::Fast, hasChangeableCC(), hasInvokeCallers(), hasMustTailCallers(), hasOnlyColdCalls(), llvm::GlobalValue::InternalLinkage, isValidCandidateForColdCC(), llvm::make_early_inc_range(), processGlobal(), RemoveAttribute(), RemovePreallocated(), and llvm::removeUnreachableBlocks().

Referenced by optimizeGlobalsInModule().

◆ OptimizeGlobalAddressOfAllocation()

This function takes the specified global variable, and transforms the program as if it always contained the result of the specified malloc.

Because it is always the result of the specified malloc, there is no reason to actually DO the malloc. Instead, turn the malloc into a global, and any loads of GV as uses of the new global.

Definition at line 928 of file GlobalOpt.cpp.

References allUsesOfLoadAndStores(), llvm::cast(), ConstantPropUsersOf(), llvm::BinaryOperator::CreateNot(), DL, llvm::dyn_cast(), llvm::GlobalVariable::eraseFromParent(), llvm::Instruction::eraseFromParent(), llvm::errs(), llvm::ArrayType::get(), llvm::UndefValue::get(), llvm::GlobalValue::getAddressSpace(), llvm::ConstantInt::getBool(), llvm::Value::getContext(), llvm::Instruction::getDebugLoc(), llvm::ConstantInt::getFalse(), llvm::Type::getInt1Ty(), llvm::Type::getInt8Ty(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::Value::getName(), llvm::ilist_node_with_parent< NodeTy, ParentTy, Options >::getNextNode(), llvm::LoadInst::getOrdering(), llvm::GlobalValue::getParent(), llvm::CmpInst::getPredicate(), llvm::LoadInst::getSyncScopeID(), llvm::GlobalValue::getThreadLocalMode(), llvm::ConstantInt::getTrue(), llvm::Use::getUser(), llvm::GlobalValue::getValueType(), llvm::CmpInst::ICMP_EQ, llvm::CmpInst::ICMP_NE, llvm::CmpInst::ICMP_UGE, llvm::CmpInst::ICMP_UGT, llvm::CmpInst::ICMP_ULE, llvm::CmpInst::ICMP_ULT, llvm::Module::insertGlobalVariable(), llvm::GlobalValue::InternalLinkage, llvm::isa(), LLVM_DEBUG, llvm_unreachable, llvm::Value::replaceAllUsesWith(), llvm::Use::set(), llvm::Value::use_begin(), llvm::Value::use_empty(), and llvm::Value::user_back().

Referenced by tryToOptimizeStoreOfAllocationToGlobal().

◆ OptimizeGlobalAliases()

Definition at line 2269 of file GlobalOpt.cpp.

References Changed, deleteIfDead(), llvm::dyn_cast(), llvm::GlobalValue::getLinkage(), hasUsesToReplace(), llvm::GlobalValue::InternalLinkage, llvm::GlobalValue::isDSOLocal(), llvm::GlobalValue::isImplicitDSOLocal(), llvm::GlobalValue::isInterposableLinkage(), llvm::make_early_inc_range(), mayHaveOtherReferences(), and llvm::Constant::stripPointerCasts().

Referenced by optimizeGlobalsInModule().

◆ optimizeGlobalsInModule()

Definition at line 2741 of file GlobalOpt.cpp.

References llvm::CallingConv::C, Changed, llvm::SmallPtrSetImplBase::clear(), DeleteDeadIFuncs(), DL, EvaluateStaticConstructor(), F, FindAtExitLibFunc(), llvm::GlobalValue::getComdat(), llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::GlobalValue::isDiscardableIfUnused(), OptimizeEmptyGlobalAtExitDtors(), OptimizeFunctions(), OptimizeGlobalAliases(), llvm::optimizeGlobalCtorsList(), OptimizeGlobalVars(), OptimizeNonTrivialIFuncs(), OptimizeStaticIFuncs(), and llvm::Value::use_empty().

Referenced by llvm::GlobalOptPass::run().

◆ OptimizeGlobalVars()

Definition at line 2050 of file GlobalOpt.cpp.

References llvm::CallingConv::C, Changed, llvm::ConstantFoldConstant(), deleteIfDead(), DL, llvm::dyn_cast(), llvm::GlobalValue::hasLocalLinkage(), llvm::Value::hasName(), llvm::GlobalValue::InternalLinkage, llvm::GlobalValue::isDeclaration(), llvm::make_early_inc_range(), processGlobal(), and llvm::GlobalValue::setLinkage().

Referenced by optimizeGlobalsInModule().

◆ OptimizeNonTrivialIFuncs()

Definition at line 2543 of file GlobalOpt.cpp.

References llvm::all_of(), llvm::any_of(), Changed, collectVersions(), llvm::dbgs(), llvm::dyn_cast(), llvm::dyn_cast_or_null(), E(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::empty(), llvm::SmallVectorTemplateCommon< T, typename >::empty(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::end(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::find(), llvm::BasicBlock::getTerminator(), I, llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::insert(), llvm::detail::DenseSetImpl< ValueT, MapTy, ValueInfoT >::insert(), llvm::APInt::isSubsetOf(), LHS, LLVM_DEBUG, MaxIFuncVersions, OptimizeNonFMVCallers, llvm::SmallVectorTemplateBase< T, bool >::push_back(), RHS, llvm::CallBase::setCalledOperand(), llvm::ArrayRef< T >::size(), llvm::sort(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::try_emplace(), and llvm::Value::users().

Referenced by optimizeGlobalsInModule().

◆ optimizeOnceStoredGlobal()

Definition at line 1138 of file GlobalOpt.cpp.

References DL, llvm::dyn_cast(), llvm::GlobalVariable::getInitializer(), llvm::Type::getPointerAddressSpace(), llvm::Value::getType(), llvm::isAllocationFn(), llvm::Constant::isNullValue(), llvm::Type::isPointerTy(), llvm::NullPointerIsDefined(), OptimizeAwayTrappingUsesOfLoads(), and tryToOptimizeStoreOfAllocationToGlobal().

Referenced by processInternalGlobal().

◆ OptimizeStaticIFuncs()

◆ processGlobal()

Analyze the specified global variable and optimize it if possible.

If we make a change, return true.

Definition at line 1646 of file GlobalOpt.cpp.

References llvm::GlobalStatus::analyzeGlobal(), Changed, llvm::dyn_cast(), llvm::Value::getName(), llvm::GlobalValue::getUnnamedAddr(), llvm::GlobalValue::Global, llvm::GlobalValue::hasGlobalUnnamedAddr(), llvm::GlobalValue::hasLocalLinkage(), llvm::GlobalValue::Local, processInternalGlobal(), llvm::GlobalValue::setUnnamedAddr(), and llvm::StringRef::starts_with().

Referenced by OptimizeFunctions(), and OptimizeGlobalVars().

◆ processInternalGlobal()

Analyze the specified global variable and optimize it if possible.

If we make a change, return true.

Definition at line 1467 of file GlobalOpt.cpp.

References assert(), Changed, CleanupConstantGlobalUsers(), CleanupPointerRootUsers(), llvm::dbgs(), DL, llvm::dyn_cast(), llvm::GlobalVariable::eraseFromParent(), forwardStoredOnceStore(), llvm::GlobalValue::getAddressSpace(), llvm::PointerType::getAddressSpace(), llvm::DebugLoc::getCompilerGenerated(), llvm::GlobalValue::getDataLayout(), llvm::GlobalVariable::getInitializer(), llvm::GlobalValue::getLinkage(), llvm::Value::getName(), llvm::GlobalValue::getParent(), llvm::GlobalValue::getThreadLocalMode(), llvm::GlobalValue::getType(), llvm::Value::getType(), llvm::GlobalValue::getValueType(), llvm::GlobalStatus::InitializerStored, llvm::isa(), llvm::GlobalVariable::isConstant(), llvm::GlobalVariable::isExternallyInitialized(), isLeakCheckerRoot(), isPointerValueDeadOnEntryToFunction(), llvm::Type::isSingleValueType(), LLVM_DEBUG, llvm::NotAtomic, optimizeOnceStoredGlobal(), llvm::Value::replaceAllUsesWith(), llvm::GlobalVariable::setConstant(), llvm::Instruction::setDebugLoc(), llvm::GlobalVariable::setInitializer(), SRAGlobal(), llvm::GlobalStatus::StoredOnce, TryToShrinkGlobalToBoolean(), and llvm::Value::use_empty().

Referenced by processGlobal().

◆ RemoveAttribute()

◆ RemovePreallocated()

Definition at line 1848 of file GlobalOpt.cpp.

References assert(), llvm::SmallVectorTemplateCommon< T, typename >::begin(), llvm::cast(), llvm::CallBase::Create(), llvm::dyn_cast(), llvm::SmallVectorTemplateCommon< T, typename >::end(), llvm::SmallVectorImpl< T >::erase(), llvm::Instruction::eraseFromParent(), F, llvm::CallBase::getArgOperand(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::ilist_node_with_parent< NodeTy, ParentTy, Options >::getNextNode(), llvm::CallBase::getOperandBundlesAsDefs(), llvm::isa(), llvm::CallBase::isMustTailCall(), RemoveAttribute(), llvm::Value::replaceAllUsesWith(), llvm::Value::takeName(), and llvm::Value::users().

Referenced by OptimizeFunctions().

◆ setUsedInitializer()

Definition at line 2119 of file GlobalOpt.cpp.

References llvm::GlobalValue::AppendingLinkage, llvm::array_pod_sort(), llvm::SmallVectorTemplateCommon< T, typename >::begin(), llvm::cast(), compareNames(), llvm::SmallVectorTemplateCommon< T, typename >::end(), llvm::ArrayType::get(), llvm::ConstantArray::get(), llvm::PointerType::get(), llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::SmallVectorTemplateCommon< T, typename >::size().

◆ SRAGlobal()

Perform scalar replacement of aggregates on the specified global variable.

This opens the door for other optimizations by exposing the behavior of the program in a more fine-grained way. We have determined that this transformation is safe already. We return the first global variable we insert so that the caller can reprocess it.

Definition at line 529 of file GlobalOpt.cpp.

References _, assert(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::begin(), llvm::cast(), collectSRATypes(), llvm::commonAlignment(), llvm::GlobalVariable::copyAttributesFrom(), llvm::count_if(), llvm::dbgs(), DL, llvm::dyn_cast(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::empty(), llvm::SmallVectorTemplateCommon< T, typename >::empty(), llvm::GlobalVariable::eraseFromParent(), llvm::GlobalValue::getAddressSpace(), llvm::GlobalVariable::getAlign(), llvm::getLoadStorePointerOperand(), llvm::getLoadStoreType(), llvm::Value::getName(), llvm::getOrEnforceKnownAlignment(), llvm::GlobalValue::getParent(), llvm::GlobalValue::getThreadLocalMode(), llvm::GlobalValue::getValueType(), llvm::GlobalValue::hasLocalLinkage(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::insert(), llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::GlobalValue::InternalLinkage, llvm::isa(), llvm::isSafeToDestroyConstant(), LLVM_DEBUG, llvm::Offset, llvm::SmallVectorImpl< T >::pop_back_val(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::RecursivelyDeleteTriviallyDeadInstructions(), llvm::Constant::removeDeadConstantUsers(), llvm::GlobalVariable::setAlignment(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::size(), llvm::sort(), transferSRADebugInfo(), and llvm::Value::users().

Referenced by processInternalGlobal().

◆ STATISTIC() [1/19]

◆ STATISTIC() [2/19]

◆ STATISTIC() [3/19]

◆ STATISTIC() [4/19]

◆ STATISTIC() [5/19]

◆ STATISTIC() [6/19]

◆ STATISTIC() [7/19]

◆ STATISTIC() [8/19]

◆ STATISTIC() [9/19]

◆ STATISTIC() [10/19]

◆ STATISTIC() [11/19]

◆ STATISTIC() [12/19]

◆ STATISTIC() [13/19]

◆ STATISTIC() [14/19]

◆ STATISTIC() [15/19]

◆ STATISTIC() [16/19]

◆ STATISTIC() [17/19]

◆ STATISTIC() [18/19]

◆ STATISTIC() [19/19]

◆ StripAttr()

◆ transferSRADebugInfo()

◆ tryToOptimizeStoreOfAllocationToGlobal()

If we have a global that is only initialized with a fixed size allocation try to transform the program to use global memory instead of heap allocated memory.

This eliminates dynamic allocation, avoids an indirection accessing the data, and exposes the resultant global to further GlobalOpt.

Definition at line 1091 of file GlobalOpt.cpp.

References allUsesOfLoadedValueWillTrapIfNull(), DL, llvm::Function::getContext(), llvm::Instruction::getFunction(), llvm::getInitialValueOfAllocation(), llvm::Type::getInt8Ty(), llvm::getObjectSize(), llvm::isRemovableAlloc(), OptimizeGlobalAddressOfAllocation(), and valueIsOnlyUsedLocallyOrStoredToOneGlobal().

Referenced by optimizeOnceStoredGlobal().

◆ TryToShrinkGlobalToBoolean()

At this point, we have learned that the only two values ever stored into GV are its initializer and OtherVal.

See if we can shrink the global into a boolean and select between the two values whenever it is used. This exposes the values to other scalar optimizations.

Definition at line 1171 of file GlobalOpt.cpp.

References AbstractManglingParser< Derived, Alloc >::Ops, llvm::GlobalVariable::addDebugInfo(), assert(), llvm::cast(), llvm::GlobalVariable::copyAttributesFrom(), llvm::SelectInst::Create(), llvm::dbgs(), DL, llvm::dyn_cast(), E(), llvm::GlobalVariable::eraseFromParent(), llvm::Instruction::eraseFromParent(), llvm::MDNode::get(), llvm::PointerType::getAddressSpace(), llvm::Value::getContext(), llvm::GlobalValue::getDataLayout(), llvm::GlobalVariable::getDebugInfo(), llvm::Instruction::getDebugLoc(), llvm::ConstantInt::getFalse(), llvm::GlobalVariable::getInitializer(), llvm::Type::getInt1Ty(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::getLoadStoreType(), llvm::Value::getName(), llvm::User::getOperand(), llvm::LoadInst::getOrdering(), llvm::GlobalValue::getParent(), llvm::LoadInst::getSyncScopeID(), llvm::GlobalValue::getThreadLocalMode(), llvm::GlobalValue::getType(), llvm::Value::getType(), llvm::GlobalValue::getValueType(), llvm::Module::insertGlobalVariable(), llvm::GlobalValue::InternalLinkage, llvm::isa(), llvm::Type::isFloatingPointTy(), llvm::Constant::isNullValue(), llvm::Type::isPointerTy(), llvm::Type::isVectorTy(), LLVM_DEBUG, llvm::DIExpression::prependOpcodes(), llvm::Value::replaceAllUsesWith(), llvm::Instruction::setDebugLoc(), llvm::Value::takeName(), llvm::Value::use_empty(), llvm::Value::user_back(), and llvm::Value::users().

Referenced by processInternalGlobal().

◆ valueIsOnlyUsedLocallyOrStoredToOneGlobal()

Scan the use-list of GV checking to make sure that there are no complex uses of GV.

We permit simple things like dereferencing the pointer, but not storing through the address, unless it is to the specified global.

Definition at line 1052 of file GlobalOpt.cpp.

References llvm::dyn_cast(), llvm::SmallVectorTemplateCommon< T, typename >::empty(), llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::isa(), llvm::SmallVectorImpl< T >::pop_back_val(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::Value::uses().

Referenced by tryToOptimizeStoreOfAllocationToGlobal().

◆ ColdCCRelFreq

◆ EnableColdCCStressTest

◆ MaxIFuncVersions

◆ OptimizeNonFMVCallers