lib/Target/X86/X86RegisterInfo.cpp

   1 //===- X86RegisterInfo.cpp - X86 Register Information ---------------------===//
   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 "llvm/Constants.h"
  10 #include "llvm/Type.h"
  11 #include "llvm/CodeGen/MachineInstrBuilder.h"
  12
  13 // X86Regs - Turn the X86RegisterInfo.def file into a bunch of register
  14 // descriptors
  15 //
  16 static const MRegisterDesc X86Regs[] = {
  17 #define R(ENUM, NAME, FLAGS, TSFLAGS) { NAME, FLAGS, TSFLAGS },
  18 #include "X86RegisterInfo.def"
  19 };
  20
  21 X86RegisterInfo::X86RegisterInfo()
  22   : MRegisterInfo(X86Regs, sizeof(X86Regs)/sizeof(X86Regs[0])) {
  23 }
  24
  25
  26 void X86RegisterInfo::copyReg2PCRel(MachineBasicBlock *MBB,
  27                                     MachineBasicBlock::iterator &MBBI,
  28                                     unsigned SrcReg, unsigned ImmOffset,
  29                                     unsigned dataSize) const
  30 {
  31   MachineInstrBuilder MI = BuildMI(X86::MOVmr32, 2)
  32     .addPCDisp(ConstantUInt::get(Type::UIntTy, ImmOffset)).addReg(SrcReg);
  33   MBB->insert(MBBI, &*MI);
  34 }
  35
  36 void X86RegisterInfo::copyPCRel2Reg(MachineBasicBlock *MBB,
  37                                     MachineBasicBlock::iterator &MBBI,
  38                                     unsigned ImmOffset, unsigned DestReg,
  39                                     unsigned dataSize) const
  40 {
  41   MachineInstrBuilder MI = BuildMI(X86::MOVrm32, 2)
  42     .addReg(DestReg).addPCDisp(ConstantUInt::get(Type::UIntTy, ImmOffset));
  43   MBB->insert(MBBI, &*MI);
  44 }
  45