TargetLowering.h File Reference

This file describes how to lower LLVM code to machine code. More...

#include "llvm/ADT/APInt.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/CodeGen/DAGCombine.h"
#include "llvm/CodeGen/ISDOpcodes.h"
#include "llvm/CodeGen/LowLevelTypeUtils.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/RuntimeLibcallUtil.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/SelectionDAGNodes.h"
#include "llvm/CodeGen/TargetCallingConv.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/CodeGenTypes/MachineValueType.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/InlineAsm.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/RuntimeLibcalls.h"
#include "llvm/IR/Type.h"
#include "llvm/Support/Alignment.h"
#include "llvm/Support/AtomicOrdering.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ErrorHandling.h"
#include <algorithm>
#include <cassert>
#include <climits>
#include <cstdint>
#include <iterator>
#include <map>
#include <string>
#include <utility>
#include <vector>
#include "llvm/IR/ConstrainedOps.def"

Go to the source code of this file.

Classes
struct	llvm::MemOp
class	llvm::TargetLoweringBase
	This base class for TargetLowering contains the SelectionDAG-independent parts that can be used from the rest of CodeGen. More...
class	llvm::TargetLoweringBase::ArgListEntry
struct	llvm::TargetLoweringBase::CondMergingParams
class	llvm::TargetLoweringBase::ValueTypeActionImpl
struct	llvm::TargetLoweringBase::IntrinsicInfo
struct	llvm::TargetLoweringBase::AddrMode
	This represents an addressing mode of: BaseGV + BaseOffs + BaseReg + Scale*ScaleReg + ScalableOffset*vscale If BaseGV is null, there is no BaseGV. More...
class	llvm::TargetLowering
	This class defines information used to lower LLVM code to legal SelectionDAG operators that the target instruction selector can accept natively. More...
struct	llvm::TargetLowering::TargetLoweringOpt
	A convenience struct that encapsulates a DAG, and two SDValues for returning information from TargetLowering to its clients that want to combine. More...
struct	llvm::TargetLowering::DAGCombinerInfo
struct	llvm::TargetLowering::PtrAuthInfo
	This structure contains the information necessary for lowering pointer-authenticating indirect calls. More...
struct	llvm::TargetLowering::CallLoweringInfo
	This structure contains all information that is necessary for lowering calls. More...
struct	llvm::TargetLowering::MakeLibCallOptions
	This structure is used to pass arguments to makeLibCall function. More...
struct	llvm::TargetLowering::AsmOperandInfo
	This contains information for each constraint that we are lowering. More...

Namespaces
namespace	llvm
	This is an optimization pass for GlobalISel generic memory operations.
namespace	llvm::Sched

Macros
#define	DAG_INSTRUCTION(NAME, NARG, ROUND_MODE, INTRINSIC, DAGN)    case ISD::STRICT_##DAGN: EqOpc = ISD::DAGN; break;
#define	CMP_INSTRUCTION(NAME, NARG, ROUND_MODE, INTRINSIC, DAGN)    case ISD::STRICT_##DAGN: EqOpc = ISD::SETCC; break;

Enumerations
enum	llvm::Sched::Preference : uint8_t {   llvm::Sched::None , llvm::Sched::Source , llvm::Sched::RegPressure , llvm::Sched::Hybrid ,   llvm::Sched::ILP , llvm::Sched::VLIW , llvm::Sched::Fast , llvm::Sched::Linearize ,   llvm::Sched::Last = Linearize }

Functions
void	llvm::GetReturnInfo (CallingConv::ID CC, Type *ReturnType, AttributeList attr, SmallVectorImpl< ISD::OutputArg > &Outs, const TargetLowering &TLI, const DataLayout &DL)
	Given an LLVM IR type and return type attributes, compute the return value EVTs and flags, and optionally also the offsets, if the return value is being lowered to memory.

Detailed Description

This file describes how to lower LLVM code to machine code.

This has two main components:

1. Which ValueTypes are natively supported by the target.
2. Which operations are supported for supported ValueTypes.
3. Cost thresholds for alternative implementations of certain operations.

In addition it has a few other components, like information about FP immediates.

Definition in file TargetLowering.h.

Macro Definition Documentation

CMP_INSTRUCTION

#define CMP_INSTRUCTION	(		NAME,
			NARG,
			ROUND_MODE,
			INTRINSIC,
			DAGN
	)		case ISD::STRICT_##DAGN: EqOpc = ISD::SETCC; break;

DAG_INSTRUCTION

#define DAG_INSTRUCTION	(		NAME,
			NARG,
			ROUND_MODE,
			INTRINSIC,
			DAGN
	)		case ISD::STRICT_##DAGN: EqOpc = ISD::DAGN; break;