mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-18 12:29:21 +00:00
aceb9132b7
program. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267 91177308-0d34-0410-b5e6-96231b3b80d8
110 lines
3.4 KiB
C++
110 lines
3.4 KiB
C++
// $Id$ -*-c++-*-
|
|
//***************************************************************************
|
|
// File:
|
|
// InstrSelection.h
|
|
//
|
|
// Purpose:
|
|
//
|
|
// History:
|
|
// 7/02/01 - Vikram Adve - Created
|
|
//***************************************************************************
|
|
|
|
#ifndef LLVM_CODEGEN_INSTR_SELECTION_H
|
|
#define LLVM_CODEGEN_INSTR_SELECTION_H
|
|
|
|
#include "llvm/Instruction.h"
|
|
#include <vector>
|
|
class CompileContext;
|
|
class Method;
|
|
class InstrForest;
|
|
class MachineInstr;
|
|
class InstructionNode;
|
|
class TmpInstruction;
|
|
class ConstPoolVal;
|
|
|
|
enum { DEBUG_TREES_NONE = 0, DEBUG_INSTR_TREES = 1, DEBUG_BURG_TREES = 5 };
|
|
|
|
//---------------------------------------------------------------------------
|
|
// GLOBAL data and an external function that must be implemented
|
|
// for each architecture.
|
|
//---------------------------------------------------------------------------
|
|
|
|
const unsigned MAX_INSTR_PER_VMINSTR = 8;
|
|
|
|
extern unsigned GetInstructionsByRule (InstructionNode* subtreeRoot,
|
|
int ruleForNode,
|
|
short* nts,
|
|
CompileContext& ccontext,
|
|
MachineInstr** minstrVec);
|
|
|
|
extern bool ThisIsAChainRule (int eruleno);
|
|
|
|
|
|
//************************ Exported Data Types *****************************/
|
|
|
|
|
|
//---------------------------------------------------------------------------
|
|
// 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,
|
|
CompileContext& ccontext,
|
|
int DebugLevel);
|
|
|
|
|
|
// Debugging function to print the generated instructions
|
|
void PrintMachineInstructions (Method* method);
|
|
|
|
|
|
//---------------------------------------------------------------------------
|
|
// 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);
|
|
|
|
|
|
//---------------------------------------------------------------------------
|
|
// 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:
|
|
TmpInstruction(OtherOps Opcode, Value *S1, Value* S2, const string &Name = "")
|
|
: Instruction(S1->getType(), Opcode, Name)
|
|
{
|
|
assert(Opcode == UserOp1 && "Tmp instruction opcode invalid!");
|
|
Operands.reserve(S2? 2 : 1);
|
|
Operands.push_back(Use(S1, this));
|
|
if (S2)
|
|
Operands.push_back(Use(S2, this));
|
|
}
|
|
|
|
virtual Instruction *clone() const { return new TmpInstruction(*this); }
|
|
virtual const char *getOpcodeName() const {
|
|
return "userOp1";
|
|
}
|
|
};
|
|
|
|
//**************************************************************************/
|
|
|
|
#endif
|