llvm::TargetLowering::TargetLoweringOpt Struct Reference

#include <TargetLowering.h>

Collaboration diagram for llvm::TargetLowering::TargetLoweringOpt:

[legend]

List of all members.

Public Member Functions
	TargetLoweringOpt (SelectionDAG &InDAG)
bool	CombineTo (SDValue O, SDValue N)
bool	ShrinkDemandedConstant (SDValue Op, const APInt &Demanded)
Public Attributes
SelectionDAG &	DAG
SDValue	Old
SDValue	New

---

Detailed Description

TargetLoweringOpt - A convenience struct that encapsulates a DAG, and two SDValues for returning information from TargetLowering to its clients that want to combine

Definition at line 719 of file TargetLowering.h.

---

Constructor & Destructor Documentation

llvm::TargetLowering::TargetLoweringOpt::TargetLoweringOpt

(

SelectionDAG &

InDAG

)

[inline, explicit]

Definition at line 724 of file TargetLowering.h.

---

Member Function Documentation

bool llvm::TargetLowering::TargetLoweringOpt::CombineTo	(	SDValue	O,
		SDValue	N
	)			[inline]

Definition at line 726 of file TargetLowering.h.

References New, and Old.

Referenced by PerformBuildVectorCombine(), ShrinkDemandedConstant(), and llvm::TargetLowering::SimplifyDemandedBits().

bool TargetLowering::TargetLoweringOpt::ShrinkDemandedConstant	(	SDValue	Op,
		const APInt &	Demanded
	)

ShrinkDemandedConstant - Check to see if the specified operand of the specified instruction is a constant integer. If so, check to see if there are any bits set in the constant that are not demanded. If so, shrink the constant and return true.

ShrinkDemandedConstant - Check to see if the specified operand of the specified instruction is a constant integer. If so, check to see if there are any bits set in the constant that are not demanded. If so, shrink the constant and return true.

Definition at line 724 of file TargetLowering.cpp.

References llvm::ISD::AND, llvm::CallingConv::C, CombineTo(), DAG, llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getNode(), llvm::SDValue::getOpcode(), llvm::SDValue::getOperand(), llvm::SDValue::getValueType(), New, llvm::ISD::OR, VT, and llvm::ISD::XOR.

Referenced by PerformBTCombine(), and llvm::TargetLowering::SimplifyDemandedBits().

---

Member Data Documentation

SelectionDAG& llvm::TargetLowering::TargetLoweringOpt::DAG

Definition at line 720 of file TargetLowering.h.

Referenced by ShrinkDemandedConstant(), and llvm::TargetLowering::SimplifyDemandedBits().

SDValue llvm::TargetLowering::TargetLoweringOpt::Old

Definition at line 721 of file TargetLowering.h.

Referenced by CombineTo().

SDValue llvm::TargetLowering::TargetLoweringOpt::New

Definition at line 722 of file TargetLowering.h.

Referenced by CombineTo(), and ShrinkDemandedConstant().

---

The documentation for this struct was generated from the following files:

• TargetLowering.h
• TargetLowering.cpp