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//===- NVPTXRegisterInfo.cpp - NVPTX Register Information -----------------===//
//
// 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 NVPTX implementation of the TargetRegisterInfo class.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "nvptx-reg-info"
#include "NVPTXRegisterInfo.h"
#include "NVPTX.h"
#include "NVPTXSubtarget.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/MC/MachineLocation.h"
#include "llvm/Target/TargetInstrInfo.h"
using namespace llvm;
namespace llvm
{
std::string getNVPTXRegClassName (TargetRegisterClass const *RC) {
if (RC == &NVPTX::Float32RegsRegClass) {
return ".f32";
}
if (RC == &NVPTX::Float64RegsRegClass) {
return ".f64";
}
else if (RC == &NVPTX::Int64RegsRegClass) {
return ".s64";
}
else if (RC == &NVPTX::Int32RegsRegClass) {
return ".s32";
}
else if (RC == &NVPTX::Int16RegsRegClass) {
return ".s16";
}
// Int8Regs become 16-bit registers in PTX
else if (RC == &NVPTX::Int8RegsRegClass) {
return ".s16";
}
else if (RC == &NVPTX::Int1RegsRegClass) {
return ".pred";
}
else if (RC == &NVPTX::SpecialRegsRegClass) {
return "!Special!";
}
else {
return "INTERNAL";
}
return "";
}
std::string getNVPTXRegClassStr (TargetRegisterClass const *RC) {
if (RC == &NVPTX::Float32RegsRegClass) {
return "%f";
}
if (RC == &NVPTX::Float64RegsRegClass) {
return "%fd";
}
else if (RC == &NVPTX::Int64RegsRegClass) {
return "%rd";
}
else if (RC == &NVPTX::Int32RegsRegClass) {
return "%r";
}
else if (RC == &NVPTX::Int16RegsRegClass) {
return "%rs";
}
else if (RC == &NVPTX::Int8RegsRegClass) {
return "%rc";
}
else if (RC == &NVPTX::Int1RegsRegClass) {
return "%p";
}
else if (RC == &NVPTX::SpecialRegsRegClass) {
return "!Special!";
}
else {
return "INTERNAL";
}
return "";
}
}
NVPTXRegisterInfo::NVPTXRegisterInfo(const TargetInstrInfo &tii,
const NVPTXSubtarget &st)
: NVPTXGenRegisterInfo(0),
Is64Bit(st.is64Bit()) {}
#define GET_REGINFO_TARGET_DESC
#include "NVPTXGenRegisterInfo.inc"
/// NVPTX Callee Saved Registers
const uint16_t* NVPTXRegisterInfo::
getCalleeSavedRegs(const MachineFunction *MF) const {
static const uint16_t CalleeSavedRegs[] = { 0 };
return CalleeSavedRegs;
}
// NVPTX Callee Saved Reg Classes
const TargetRegisterClass* const*
NVPTXRegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const {
static const TargetRegisterClass * const CalleeSavedRegClasses[] = { 0 };
return CalleeSavedRegClasses;
}
BitVector NVPTXRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
BitVector Reserved(getNumRegs());
return Reserved;
}
void NVPTXRegisterInfo::
eliminateFrameIndex(MachineBasicBlock::iterator II,
int SPAdj, unsigned FIOperandNum,
RegScavenger *RS) const {
assert(SPAdj == 0 && "Unexpected");
MachineInstr &MI = *II;
int FrameIndex = MI.getOperand(FIOperandNum).getIndex();
MachineFunction &MF = *MI.getParent()->getParent();
int Offset = MF.getFrameInfo()->getObjectOffset(FrameIndex) +
MI.getOperand(FIOperandNum+1).getImm();
// Using I0 as the frame pointer
MI.getOperand(FIOperandNum).ChangeToRegister(NVPTX::VRFrame, false);
MI.getOperand(FIOperandNum+1).ChangeToImmediate(Offset);
}
int NVPTXRegisterInfo::
getDwarfRegNum(unsigned RegNum, bool isEH) const {
return 0;
}
unsigned NVPTXRegisterInfo::getFrameRegister(const MachineFunction &MF) const {
return NVPTX::VRFrame;
}
unsigned NVPTXRegisterInfo::getRARegister() const {
return 0;
}
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