mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-20 11:29:24 +00:00
selection. These used to live in several different places before. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@719 91177308-0d34-0410-b5e6-96231b3b80d8
103 lines
3.5 KiB
C++
103 lines
3.5 KiB
C++
// $Id$ -*-c++-*-
|
|
//***************************************************************************
|
|
// File:
|
|
// InstrSelectionSupport.h
|
|
//
|
|
// Purpose:
|
|
// Target-independent instruction selection code.
|
|
// See SparcInstrSelection.cpp for usage.
|
|
//
|
|
// History:
|
|
// 10/10/01 - Vikram Adve - Created
|
|
//**************************************************************************/
|
|
|
|
#ifndef LLVM_CODEGEN_INSTR_SELECTION_SUPPORT_H
|
|
#define LLVM_CODEGEN_INSTR_SELECTION_SUPPORT_H
|
|
|
|
#include "llvm/Instruction.h"
|
|
#include "llvm/CodeGen/MachineInstr.h"
|
|
class Method;
|
|
class InstrForest;
|
|
class MachineInstr;
|
|
class InstructionNode;
|
|
class TmpInstruction;
|
|
class ConstPoolVal;
|
|
class TargetMachine;
|
|
|
|
//************************ Exported Functions ******************************/
|
|
|
|
|
|
//---------------------------------------------------------------------------
|
|
// Function: FoldGetElemChain
|
|
//
|
|
// Purpose:
|
|
// Fold a chain of GetElementPtr instructions into an equivalent
|
|
// (Pointer, IndexVector) pair. Returns the pointer Value, and
|
|
// stores the resulting IndexVector in argument chainIdxVec.
|
|
//---------------------------------------------------------------------------
|
|
|
|
Value* FoldGetElemChain (const InstructionNode* getElemInstrNode,
|
|
vector<ConstPoolVal*>& chainIdxVec);
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
// Function Set2OperandsFromInstr
|
|
// Function Set3OperandsFromInstr
|
|
//
|
|
// Purpose:
|
|
//
|
|
// For the common case of 2- and 3-operand arithmetic/logical instructions,
|
|
// set the m/c instr. operands directly from the VM instruction's operands.
|
|
// Check whether the first or second operand is 0 and can use a dedicated
|
|
// "0" register.
|
|
// Check whether the second operand should use an immediate field or register.
|
|
// (First and third operands are never immediates for such instructions.)
|
|
//
|
|
// Arguments:
|
|
// canDiscardResult: Specifies that the result operand can be discarded
|
|
// by using the dedicated "0"
|
|
//
|
|
// op1position, op2position and resultPosition: Specify in which position
|
|
// in the machine instruction the 3 operands (arg1, arg2
|
|
// and result) should go.
|
|
//
|
|
// RETURN VALUE: unsigned int flags, where
|
|
// flags & 0x01 => operand 1 is constant and needs a register
|
|
// flags & 0x02 => operand 2 is constant and needs a register
|
|
//------------------------------------------------------------------------
|
|
|
|
void Set2OperandsFromInstr (MachineInstr* minstr,
|
|
InstructionNode* vmInstrNode,
|
|
const TargetMachine& targetMachine,
|
|
bool canDiscardResult = false,
|
|
int op1Position = 0,
|
|
int resultPosition = 1);
|
|
|
|
void Set3OperandsFromInstr (MachineInstr* minstr,
|
|
InstructionNode* vmInstrNode,
|
|
const TargetMachine& targetMachine,
|
|
bool canDiscardResult = false,
|
|
int op1Position = 0,
|
|
int op2Position = 1,
|
|
int resultPosition = 2);
|
|
|
|
|
|
//---------------------------------------------------------------------------
|
|
// Function: ChooseRegOrImmed
|
|
//
|
|
// Purpose:
|
|
//
|
|
//---------------------------------------------------------------------------
|
|
|
|
MachineOperand::MachineOperandType
|
|
ChooseRegOrImmed (Value* val,
|
|
MachineOpCode opCode,
|
|
const TargetMachine& targetMachine,
|
|
bool canUseImmed,
|
|
unsigned int& getMachineRegNum,
|
|
int64_t& getImmedValue);
|
|
|
|
//**************************************************************************/
|
|
|
|
#endif
|