X86RegisterInfo.cpp revision 6877dd3fb05bb7f8fabf907e520c7d3ae0fab341 
1//===- X86RegisterInfo.cpp - X86 Register Information -----------*- C++ -*-===//
2//
3// This file contains the X86 implementation of the MRegisterInfo class.
4//
5//===----------------------------------------------------------------------===//
6
7#include "X86.h"
8#include "X86RegisterInfo.h"
9#include "X86InstrBuilder.h"
10#include "llvm/Constants.h"
11#include "llvm/Type.h"
12#include "llvm/CodeGen/MachineInstrBuilder.h"
13
14// X86Regs - Turn the X86RegisterInfo.def file into a bunch of register
15// descriptors
16//
17static const MRegisterDesc X86Regs[] = {
18#define R(ENUM, NAME, FLAGS, TSFLAGS) { NAME, FLAGS, TSFLAGS },
19#include "X86RegisterInfo.def"
20};
21
22X86RegisterInfo::X86RegisterInfo()
23  : MRegisterInfo(X86Regs, sizeof(X86Regs)/sizeof(X86Regs[0])) {
24}
25
26
27MachineBasicBlock::iterator
28X86RegisterInfo::storeReg2RegOffset(MachineBasicBlock *MBB,
29                                    MachineBasicBlock::iterator &MBBI,
30                                    unsigned SrcReg, unsigned DestReg,
31                                    unsigned ImmOffset, unsigned dataSize)
32  const
33{
34  MachineInstr *MI = addRegOffset(BuildMI(X86::MOVrm32, 5),
35                                  DestReg, ImmOffset).addReg(SrcReg);
36  return ++(MBB->insert(MBBI, MI));
37}
38
39MachineBasicBlock::iterator
40X86RegisterInfo::loadRegOffset2Reg(MachineBasicBlock *MBB,
41                                   MachineBasicBlock::iterator &MBBI,
42                                   unsigned DestReg, unsigned SrcReg,
43                                   unsigned ImmOffset, unsigned dataSize)
44  const
45{
46  MachineInstr *MI = addRegOffset(BuildMI(X86::MOVmr32, 5).addReg(DestReg),
47                                  SrcReg, ImmOffset);
48  return ++(MBB->insert(MBBI, MI));
49}
50
51
52unsigned X86RegisterInfo::getFramePointer() const {
53  return X86::EBP;
54}
55
56unsigned X86RegisterInfo::getStackPointer() const {
57  return X86::ESP;
58}
59