forked from OSchip/llvm-project
82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
//===- AlphaInstrInfo.cpp - Alpha Instruction Information -------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by the LLVM research group and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains the Alpha implementation of the TargetInstrInfo class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "Alpha.h"
|
|
#include "AlphaInstrInfo.h"
|
|
#include "AlphaGenInstrInfo.inc"
|
|
#include "llvm/CodeGen/MachineInstrBuilder.h"
|
|
#include <iostream>
|
|
using namespace llvm;
|
|
|
|
AlphaInstrInfo::AlphaInstrInfo()
|
|
: TargetInstrInfo(AlphaInsts, sizeof(AlphaInsts)/sizeof(AlphaInsts[0])) { }
|
|
|
|
|
|
bool AlphaInstrInfo::isMoveInstr(const MachineInstr& MI,
|
|
unsigned& sourceReg,
|
|
unsigned& destReg) const {
|
|
MachineOpCode oc = MI.getOpcode();
|
|
if (oc == Alpha::BIS || oc == Alpha::CPYSS || oc == Alpha::CPYST) {
|
|
// or r1, r2, r2
|
|
// cpys(s|t) r1 r2 r2
|
|
assert(MI.getNumOperands() == 3 &&
|
|
MI.getOperand(0).isRegister() &&
|
|
MI.getOperand(1).isRegister() &&
|
|
MI.getOperand(2).isRegister() &&
|
|
"invalid Alpha BIS instruction!");
|
|
if (MI.getOperand(1).getReg() == MI.getOperand(2).getReg()) {
|
|
sourceReg = MI.getOperand(1).getReg();
|
|
destReg = MI.getOperand(0).getReg();
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
unsigned
|
|
AlphaInstrInfo::isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const {
|
|
switch (MI->getOpcode()) {
|
|
case Alpha::LDL:
|
|
case Alpha::LDQ:
|
|
case Alpha::LDBU:
|
|
case Alpha::LDWU:
|
|
case Alpha::LDS:
|
|
case Alpha::LDT:
|
|
if (MI->getOperand(1).isFrameIndex()) {
|
|
FrameIndex = MI->getOperand(1).getFrameIndex();
|
|
return MI->getOperand(0).getReg();
|
|
}
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
unsigned
|
|
AlphaInstrInfo::isStoreToStackSlot(MachineInstr *MI, int &FrameIndex) const {
|
|
switch (MI->getOpcode()) {
|
|
case Alpha::STL:
|
|
case Alpha::STQ:
|
|
case Alpha::STB:
|
|
case Alpha::STW:
|
|
case Alpha::STS:
|
|
case Alpha::STT:
|
|
if (MI->getOperand(1).isFrameIndex()) {
|
|
FrameIndex = MI->getOperand(1).getFrameIndex();
|
|
return MI->getOperand(0).getReg();
|
|
}
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|