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//===- ARMInstrInfo.cpp - ARM Instruction Information -----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the ARM implementation of the TargetInstrInfo class.
//
//===----------------------------------------------------------------------===//
#include "ARMInstrInfo.h"
#include "ARM.h"
#include "ARMAddressingModes.h"
#include "ARMGenInstrInfo.inc"
#include "ARMMachineFunctionInfo.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/CodeGen/LiveVariables.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Support/CommandLine.h"
using namespace llvm;
ARMInstrInfo::ARMInstrInfo(const ARMSubtarget &STI)
: ARMBaseInstrInfo(STI), RI(*this, STI) {
}
unsigned ARMInstrInfo::
unsignedOffsetOpcodeToSigned(unsigned opcode, unsigned *NumBits) const {
return 0;
}
unsigned ARMInstrInfo::
getUnindexedOpcode(unsigned Opc) const {
switch (Opc) {
default: break;
case ARM::LDR_PRE:
case ARM::LDR_POST:
return ARM::LDR;
case ARM::LDRH_PRE:
case ARM::LDRH_POST:
return ARM::LDRH;
case ARM::LDRB_PRE:
case ARM::LDRB_POST:
return ARM::LDRB;
case ARM::LDRSH_PRE:
case ARM::LDRSH_POST:
return ARM::LDRSH;
case ARM::LDRSB_PRE:
case ARM::LDRSB_POST:
return ARM::LDRSB;
case ARM::STR_PRE:
case ARM::STR_POST:
return ARM::STR;
case ARM::STRH_PRE:
case ARM::STRH_POST:
return ARM::STRH;
case ARM::STRB_PRE:
case ARM::STRB_POST:
return ARM::STRB;
}
return 0;
}
unsigned ARMInstrInfo::
getOpcode(ARMII::Op Op) const {
switch (Op) {
case ARMII::ADDri: return ARM::ADDri;
case ARMII::ADDrs: return ARM::ADDrs;
case ARMII::ADDrr: return ARM::ADDrr;
case ARMII::B: return ARM::B;
case ARMII::Bcc: return ARM::Bcc;
case ARMII::BR_JTr: return ARM::BR_JTr;
case ARMII::BR_JTm: return ARM::BR_JTm;
case ARMII::BR_JTadd: return ARM::BR_JTadd;
case ARMII::BX_RET: return ARM::BX_RET;
case ARMII::FCPYS: return ARM::FCPYS;
case ARMII::FCPYD: return ARM::FCPYD;
case ARMII::FLDD: return ARM::FLDD;
case ARMII::FLDS: return ARM::FLDS;
case ARMII::FSTD: return ARM::FSTD;
case ARMII::FSTS: return ARM::FSTS;
case ARMII::LDR: return ARM::LDR;
case ARMII::MOVr: return ARM::MOVr;
case ARMII::STR: return ARM::STR;
case ARMII::SUBri: return ARM::SUBri;
case ARMII::SUBrs: return ARM::SUBrs;
case ARMII::SUBrr: return ARM::SUBrr;
case ARMII::VMOVD: return ARM::VMOVD;
case ARMII::VMOVQ: return ARM::VMOVQ;
default:
break;
}
return 0;
}
bool ARMInstrInfo::
BlockHasNoFallThrough(const MachineBasicBlock &MBB) const {
if (MBB.empty()) return false;
switch (MBB.back().getOpcode()) {
case ARM::BX_RET: // Return.
case ARM::LDM_RET:
case ARM::B:
case ARM::BR_JTr: // Jumptable branch.
case ARM::BR_JTm: // Jumptable branch through mem.
case ARM::BR_JTadd: // Jumptable branch add to pc.
return true;
default:
break;
}
return false;
}
void ARMInstrInfo::
reMaterialize(MachineBasicBlock &MBB,
MachineBasicBlock::iterator I,
unsigned DestReg, unsigned SubIdx,
const MachineInstr *Orig) const {
DebugLoc dl = Orig->getDebugLoc();
if (Orig->getOpcode() == ARM::MOVi2pieces) {
RI.emitLoadConstPool(MBB, I, dl,
DestReg, SubIdx,
Orig->getOperand(1).getImm(),
(ARMCC::CondCodes)Orig->getOperand(2).getImm(),
Orig->getOperand(3).getReg());
return;
}
MachineInstr *MI = MBB.getParent()->CloneMachineInstr(Orig);
MI->getOperand(0).setReg(DestReg);
MBB.insert(I, MI);
}
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