mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
95ce098219
%higher and %highest can have non-zero values only for offsets greater than 2GB, which is highly unlikely, if not impossible when compiling a single function. This makes long branch for MIPS64 3 instructions smaller. Differential Revision: http://llvm-reviews.chandlerc.com/D3281.diff git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209678 91177308-0d34-0410-b5e6-96231b3b80d8
51 lines
1.7 KiB
C++
51 lines
1.7 KiB
C++
//===-- MipsMCInstLower.h - Lower MachineInstr to MCInst -------*- C++ -*--===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef MIPSMCINSTLOWER_H
|
|
#define MIPSMCINSTLOWER_H
|
|
#include "MCTargetDesc/MipsMCExpr.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/CodeGen/MachineOperand.h"
|
|
#include "llvm/Support/Compiler.h"
|
|
|
|
namespace llvm {
|
|
class MCContext;
|
|
class MCInst;
|
|
class MCOperand;
|
|
class MachineInstr;
|
|
class MachineFunction;
|
|
class MipsAsmPrinter;
|
|
|
|
/// MipsMCInstLower - This class is used to lower an MachineInstr into an
|
|
// MCInst.
|
|
class LLVM_LIBRARY_VISIBILITY MipsMCInstLower {
|
|
typedef MachineOperand::MachineOperandType MachineOperandType;
|
|
MCContext *Ctx;
|
|
MipsAsmPrinter &AsmPrinter;
|
|
public:
|
|
MipsMCInstLower(MipsAsmPrinter &asmprinter);
|
|
void Initialize(MCContext *C);
|
|
void Lower(const MachineInstr *MI, MCInst &OutMI) const;
|
|
MCOperand LowerOperand(const MachineOperand& MO, unsigned offset = 0) const;
|
|
|
|
private:
|
|
MCOperand LowerSymbolOperand(const MachineOperand &MO,
|
|
MachineOperandType MOTy, unsigned Offset) const;
|
|
MCOperand createSub(MachineBasicBlock *BB1, MachineBasicBlock *BB2,
|
|
MCSymbolRefExpr::VariantKind Kind) const;
|
|
void lowerLongBranchLUi(const MachineInstr *MI, MCInst &OutMI) const;
|
|
void lowerLongBranchADDiu(const MachineInstr *MI, MCInst &OutMI,
|
|
int Opcode,
|
|
MCSymbolRefExpr::VariantKind Kind) const;
|
|
bool lowerLongBranch(const MachineInstr *MI, MCInst &OutMI) const;
|
|
};
|
|
}
|
|
|
|
#endif
|