Evaluator.cpp File Reference

#include "llvm/Transforms/Utils/Evaluator.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/CallSite.h"
#include "llvm/IR/Constant.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/InstrTypes.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/Operator.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/User.h"
#include "llvm/IR/Value.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include <iterator>

Include dependency graph for Evaluator.cpp:

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Macros
#define	DEBUG_TYPE   "evaluator"

Functions
static bool	isSimpleEnoughValueToCommit (Constant *C, SmallPtrSetImpl< Constant *> &SimpleConstants, const DataLayout &DL)
static bool	isSimpleEnoughValueToCommitHelper (Constant *C, SmallPtrSetImpl< Constant *> &SimpleConstants, const DataLayout &DL)
	Return true if the specified constant can be handled by the code generator. More...
static bool	isSimpleEnoughPointerToCommit (Constant *C)
	Return true if this constant is simple enough for us to understand. More...
static Constant *	getInitializer (Constant *C)
static Function *	getFunction (Constant *C)

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "evaluator"

Definition at line 44 of file Evaluator.cpp.

Function Documentation

getFunction()

static Function* getFunction ( Constant *  C )

static

Definition at line 221 of file Evaluator.cpp.

Referenced by llvm::MachineIRBuilder::buildConstant(), computePointerICmp(), llvm::Evaluator::getCalleeWithFormalArgs(), llvm::LLParser::getContext(), llvm::Instruction::getFunction(), llvm::AMDGPULibFunc::getFunctionType(), llvm::Instruction::getModule(), insertLifetimeMarkersSurroundingCall(), llvm::InstrProfSymtab::isExternalSymbol(), LLVMGetNamedFunction(), llvm::BlockAddress::lookup(), LowerWRITE_REGISTER(), llvm::Constant::needsRelocation(), llvm::DiagnosticInfoResourceLimit::print(), llvm::CallGraphNode::print(), and llvm::CoroIdInst::setCoroutineSelf().

getInitializer()

static Constant* getInitializer ( Constant *  C )

static

Definition at line 178 of file Evaluator.cpp.

References C, llvm::ConstantFoldLoadThroughBitcast(), llvm::ConstantFoldLoadThroughGEPConstantExpr(), llvm::dyn_cast(), llvm::Type::getPointerElementType(), llvm::Value::getType(), llvm::Evaluator::getVal(), llvm::GlobalVariable::hasDefinitiveInitializer(), I, if(), and P.

Referenced by splitGlobal().

isSimpleEnoughPointerToCommit()

static bool isSimpleEnoughPointerToCommit ( Constant *  C )

static

Return true if this constant is simple enough for us to understand.

In particular, if it is a cast to anything other than from one pointer type to another pointer type, we punt. We basically just support direct accesses to globals and GEP's of globals. This should be kept up to date with CommitValueTo.

Definition at line 132 of file Evaluator.cpp.

References llvm::ConstantFoldLoadThroughGEPConstantExpr(), llvm::dyn_cast(), llvm::GlobalVariable::getInitializer(), llvm::Value::getType(), llvm::GlobalVariable::hasUniqueInitializer(), and llvm::ConstantInt::isZero().

Referenced by llvm::Evaluator::EvaluateBlock().

isSimpleEnoughValueToCommit()

static bool isSimpleEnoughValueToCommit ( Constant *  C, SmallPtrSetImpl< Constant *> &  SimpleConstants, const DataLayout &  DL  )

inlinestatic

Definition at line 117 of file Evaluator.cpp.

References llvm::SmallPtrSetImpl< PtrType >::insert(), and isSimpleEnoughValueToCommitHelper().

Referenced by llvm::Evaluator::EvaluateBlock(), and isSimpleEnoughValueToCommitHelper().

isSimpleEnoughValueToCommitHelper()

static bool isSimpleEnoughValueToCommitHelper ( Constant *  C, SmallPtrSetImpl< Constant *> &  SimpleConstants, const DataLayout &  DL  )

static

Return true if the specified constant can be handled by the code generator.

We don't want to generate something like: void *X = &X/42; because the code generator doesn't have a relocation that can handle that.

This function should be called if C was not found (but just got inserted) in SimpleConstants to avoid having to rescan the same constants all the time.

Definition at line 62 of file Evaluator.cpp.

References llvm::MCID::Add, C, llvm::User::getNumOperands(), llvm::ConstantExpr::getOpcode(), llvm::User::getOperand(), llvm::Value::getType(), llvm::DataLayout::getTypeSizeInBits(), isSimpleEnoughValueToCommit(), and llvm::User::operands().

Referenced by isSimpleEnoughValueToCommit().