mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
e8f1e44fd7
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1188 91177308-0d34-0410-b5e6-96231b3b80d8
123 lines
3.7 KiB
C++
123 lines
3.7 KiB
C++
// $Id$ -*-c++-*-
|
|
//***************************************************************************
|
|
// File:
|
|
// InstrSelection.h
|
|
//
|
|
// Purpose:
|
|
// External interface to instruction selection.
|
|
//
|
|
// History:
|
|
// 7/02/01 - Vikram Adve - Created
|
|
//**************************************************************************/
|
|
|
|
#ifndef LLVM_CODEGEN_INSTR_SELECTION_H
|
|
#define LLVM_CODEGEN_INSTR_SELECTION_H
|
|
|
|
#include "llvm/Instruction.h"
|
|
class Method;
|
|
class InstrForest;
|
|
class MachineInstr;
|
|
class InstructionNode;
|
|
class TmpInstruction;
|
|
class ConstPoolVal;
|
|
class TargetMachine;
|
|
|
|
|
|
/************************* Required Functions *******************************
|
|
* Target-dependent functions that MUST be implemented for each target.
|
|
***************************************************************************/
|
|
|
|
const unsigned MAX_INSTR_PER_VMINSTR = 8;
|
|
|
|
const Instruction::OtherOps TMP_INSTRUCTION_OPCODE = Instruction::UserOp1;
|
|
|
|
extern unsigned GetInstructionsByRule (InstructionNode* subtreeRoot,
|
|
int ruleForNode,
|
|
short* nts,
|
|
TargetMachine &Target,
|
|
MachineInstr** minstrVec);
|
|
|
|
extern unsigned GetInstructionsForProlog(BasicBlock* entryBB,
|
|
TargetMachine &Target,
|
|
MachineInstr** minstrVec);
|
|
|
|
extern unsigned GetInstructionsForEpilog(BasicBlock* anExitBB,
|
|
TargetMachine &Target,
|
|
MachineInstr** minstrVec);
|
|
|
|
extern bool ThisIsAChainRule (int eruleno);
|
|
|
|
|
|
//************************ Exported Functions ******************************/
|
|
|
|
|
|
//---------------------------------------------------------------------------
|
|
// Function: SelectInstructionsForMethod
|
|
//
|
|
// Purpose:
|
|
// Entry point for instruction selection using BURG.
|
|
// Returns true if instruction selection failed, false otherwise.
|
|
// Implemented in machine-specific instruction selection file.
|
|
//---------------------------------------------------------------------------
|
|
|
|
bool SelectInstructionsForMethod (Method* method,
|
|
TargetMachine &Target);
|
|
|
|
|
|
//************************ Exported Data Types *****************************/
|
|
|
|
|
|
//---------------------------------------------------------------------------
|
|
// class TmpInstruction
|
|
//
|
|
// This class represents temporary intermediate values
|
|
// used within the machine code for a VM instruction
|
|
//---------------------------------------------------------------------------
|
|
|
|
class TmpInstruction : public Instruction {
|
|
TmpInstruction (const TmpInstruction &ci)
|
|
: Instruction(ci.getType(), ci.getOpcode())
|
|
{
|
|
Operands.reserve(2);
|
|
Operands.push_back(Use(Operands[0], this));
|
|
Operands.push_back(Use(Operands[1], this));
|
|
}
|
|
public:
|
|
// Constructor that uses the type of S1 as the type of the temporary.
|
|
// s1 must be a valid value. s2 may be NULL.
|
|
TmpInstruction(OtherOps opcode, Value *s1, Value* s2, const string &name="")
|
|
: Instruction(s1->getType(), opcode, name)
|
|
{
|
|
assert(s1 != NULL && "Use different constructor if both operands are 0");
|
|
Initialize(opcode, s1, s2);
|
|
}
|
|
|
|
// Constructor that allows the type of the temporary to be specified.
|
|
// Both S1 and S2 may be NULL.
|
|
TmpInstruction(OtherOps opcode, const Type* tmpType,
|
|
Value *s1, Value* s2, const string &name = "")
|
|
: Instruction(tmpType, opcode, name)
|
|
{
|
|
Initialize(opcode, s1, s2);
|
|
}
|
|
|
|
virtual Instruction *clone() const { return new TmpInstruction(*this); }
|
|
virtual const char *getOpcodeName() const {
|
|
return "userOp1";
|
|
}
|
|
|
|
private:
|
|
void Initialize(OtherOps opcode, Value *s1, Value* s2) {
|
|
assert(opcode==TMP_INSTRUCTION_OPCODE && "Tmp instruction opcode invalid");
|
|
Operands.reserve(s1 && s2? 2 : ((s1 || s2)? 1 : 0));
|
|
if (s1)
|
|
Operands.push_back(Use(s1, this));
|
|
if (s2)
|
|
Operands.push_back(Use(s2, this));
|
|
}
|
|
};
|
|
|
|
//**************************************************************************/
|
|
|
|
#endif
|