PPCRegisterInfo.cpp revision ce50a165c784d71abf1b2f981be18f867787d972
121e463b2bf864671a87ebe386cb100ef9349a540Nate Begeman//===- PPCRegisterInfo.cpp - PowerPC Register Information -------*- C++ -*-===// 2b5f662fa0314f7e7e690aae8ebff7136cc3a5ab0Misha Brukman// 3f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman// The LLVM Compiler Infrastructure 4f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman// 5f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman// This file was developed by the LLVM research group and is distributed under 6f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman// the University of Illinois Open Source License. See LICENSE.TXT for details. 7b5f662fa0314f7e7e690aae8ebff7136cc3a5ab0Misha Brukman// 8f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman//===----------------------------------------------------------------------===// 9f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman// 1021e463b2bf864671a87ebe386cb100ef9349a540Nate Begeman// This file contains the PowerPC implementation of the MRegisterInfo class. 11f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman// 12f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman//===----------------------------------------------------------------------===// 13f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 14f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman#define DEBUG_TYPE "reginfo" 152668959b8879097db368aec7d76c455260abc75bChris Lattner#include "PPC.h" 1626bd0d48a164c419462133270e3ec1c2401a34d7Chris Lattner#include "PPCInstrBuilder.h" 1716e71f2f70811c69c56052dd146324fe20e31db5Chris Lattner#include "PPCRegisterInfo.h" 18804e06704261f233111913a047ef7f7dec1b8725Chris Lattner#include "PPCSubtarget.h" 19f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman#include "llvm/Constants.h" 20f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman#include "llvm/Type.h" 21f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman#include "llvm/CodeGen/ValueTypes.h" 22f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman#include "llvm/CodeGen/MachineInstrBuilder.h" 234188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey#include "llvm/CodeGen/MachineDebugInfo.h" 24f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman#include "llvm/CodeGen/MachineFunction.h" 25f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman#include "llvm/CodeGen/MachineFrameInfo.h" 26f1d78e83356a412e525c30ac90dabf090a8cfc99Jim Laskey#include "llvm/CodeGen/MachineLocation.h" 274188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey#include "llvm/CodeGen/SelectionDAGNodes.h" 28f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman#include "llvm/Target/TargetFrameInfo.h" 29f9568d8700d5389799796262cde313bb5c7d588aChris Lattner#include "llvm/Target/TargetInstrInfo.h" 30f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman#include "llvm/Target/TargetMachine.h" 31f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman#include "llvm/Target/TargetOptions.h" 32551ccae044b0ff658fe629dd67edd5ffe75d10e8Reid Spencer#include "llvm/Support/CommandLine.h" 33551ccae044b0ff658fe629dd67edd5ffe75d10e8Reid Spencer#include "llvm/Support/Debug.h" 34ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman#include "llvm/Support/MathExtras.h" 35551ccae044b0ff658fe629dd67edd5ffe75d10e8Reid Spencer#include "llvm/ADT/STLExtras.h" 36f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman#include <cstdlib> 37f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman#include <iostream> 38f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukmanusing namespace llvm; 39f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 40369503f8412bba4a0138074c97107c09cc4513e0Chris Lattner/// getRegisterNumbering - Given the enum value for some register, e.g. 41369503f8412bba4a0138074c97107c09cc4513e0Chris Lattner/// PPC::F14, return the number that it corresponds to (e.g. 14). 42369503f8412bba4a0138074c97107c09cc4513e0Chris Lattnerunsigned PPCRegisterInfo::getRegisterNumbering(unsigned RegEnum) { 43be6a039ad4c6314176b0834c341a25504fded32eChris Lattner using namespace PPC; 44369503f8412bba4a0138074c97107c09cc4513e0Chris Lattner switch (RegEnum) { 45be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R0 : case X0 : case F0 : case V0 : case CR0: return 0; 46be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R1 : case X1 : case F1 : case V1 : case CR1: return 1; 47be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R2 : case X2 : case F2 : case V2 : case CR2: return 2; 48be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R3 : case X3 : case F3 : case V3 : case CR3: return 3; 49be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R4 : case X4 : case F4 : case V4 : case CR4: return 4; 50be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R5 : case X5 : case F5 : case V5 : case CR5: return 5; 51be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R6 : case X6 : case F6 : case V6 : case CR6: return 6; 52be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R7 : case X7 : case F7 : case V7 : case CR7: return 7; 53be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R8 : case X8 : case F8 : case V8 : return 8; 54be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R9 : case X9 : case F9 : case V9 : return 9; 55be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R10: case X10: case F10: case V10: return 10; 56be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R11: case X11: case F11: case V11: return 11; 57be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R12: case X12: case F12: case V12: return 12; 58be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R13: case X13: case F13: case V13: return 13; 59be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R14: case X14: case F14: case V14: return 14; 60be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R15: case X15: case F15: case V15: return 15; 61be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R16: case X16: case F16: case V16: return 16; 62be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R17: case X17: case F17: case V17: return 17; 63be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R18: case X18: case F18: case V18: return 18; 64be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R19: case X19: case F19: case V19: return 19; 65be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R20: case X20: case F20: case V20: return 20; 66be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R21: case X21: case F21: case V21: return 21; 67be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R22: case X22: case F22: case V22: return 22; 68be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R23: case X23: case F23: case V23: return 23; 69be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R24: case X24: case F24: case V24: return 24; 70be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R25: case X25: case F25: case V25: return 25; 71be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R26: case X26: case F26: case V26: return 26; 72be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R27: case X27: case F27: case V27: return 27; 73be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R28: case X28: case F28: case V28: return 28; 74be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R29: case X29: case F29: case V29: return 29; 75be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R30: case X30: case F30: case V30: return 30; 76be6a039ad4c6314176b0834c341a25504fded32eChris Lattner case R31: case X31: case F31: case V31: return 31; 77be6a039ad4c6314176b0834c341a25504fded32eChris Lattner default: 78be6a039ad4c6314176b0834c341a25504fded32eChris Lattner std::cerr << "Unhandled reg in PPCRegisterInfo::getRegisterNumbering!\n"; 79be6a039ad4c6314176b0834c341a25504fded32eChris Lattner abort(); 80369503f8412bba4a0138074c97107c09cc4513e0Chris Lattner } 81369503f8412bba4a0138074c97107c09cc4513e0Chris Lattner} 82369503f8412bba4a0138074c97107c09cc4513e0Chris Lattner 83804e06704261f233111913a047ef7f7dec1b8725Chris LattnerPPCRegisterInfo::PPCRegisterInfo(const PPCSubtarget &ST) 84804e06704261f233111913a047ef7f7dec1b8725Chris Lattner : PPCGenRegisterInfo(PPC::ADJCALLSTACKDOWN, PPC::ADJCALLSTACKUP), 85804e06704261f233111913a047ef7f7dec1b8725Chris Lattner Subtarget(ST) { 86b5f662fa0314f7e7e690aae8ebff7136cc3a5ab0Misha Brukman ImmToIdxMap[PPC::LD] = PPC::LDX; ImmToIdxMap[PPC::STD] = PPC::STDX; 87f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman ImmToIdxMap[PPC::LBZ] = PPC::LBZX; ImmToIdxMap[PPC::STB] = PPC::STBX; 88f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman ImmToIdxMap[PPC::LHZ] = PPC::LHZX; ImmToIdxMap[PPC::LHA] = PPC::LHAX; 89f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman ImmToIdxMap[PPC::LWZ] = PPC::LWZX; ImmToIdxMap[PPC::LWA] = PPC::LWAX; 90f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman ImmToIdxMap[PPC::LFS] = PPC::LFSX; ImmToIdxMap[PPC::LFD] = PPC::LFDX; 91f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman ImmToIdxMap[PPC::STH] = PPC::STHX; ImmToIdxMap[PPC::STW] = PPC::STWX; 92f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman ImmToIdxMap[PPC::STFS] = PPC::STFSX; ImmToIdxMap[PPC::STFD] = PPC::STFDX; 931d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman ImmToIdxMap[PPC::ADDI] = PPC::ADD4; 94f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman} 95f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 96b5f662fa0314f7e7e690aae8ebff7136cc3a5ab0Misha Brukmanvoid 9721e463b2bf864671a87ebe386cb100ef9349a540Nate BegemanPPCRegisterInfo::storeRegToStackSlot(MachineBasicBlock &MBB, 9821e463b2bf864671a87ebe386cb100ef9349a540Nate Begeman MachineBasicBlock::iterator MI, 9921e463b2bf864671a87ebe386cb100ef9349a540Nate Begeman unsigned SrcReg, int FrameIdx, 10021e463b2bf864671a87ebe386cb100ef9349a540Nate Begeman const TargetRegisterClass *RC) const { 101f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman if (SrcReg == PPC::LR) { 1029c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner // FIXME: this spills LR immediately to memory in one step. To do this, we 1039c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner // use R11, which we know cannot be used in the prolog/epilog. This is a 1049c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner // hack. 1053f852b45fcfb0dde647eff77f9186378c3f0448aChris Lattner BuildMI(MBB, MI, PPC::MFLR, 1, PPC::R11); 106919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner addFrameReference(BuildMI(MBB, MI, PPC::STW, 3).addReg(PPC::R11), FrameIdx); 1071d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } else if (RC == PPC::CRRCRegisterClass) { 108e67304fb7880bd55d194d68b827c0eb2366c0a91Chris Lattner // FIXME: We use R0 here, because it isn't available for RA. 109b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner // We need to store the CR in the low 4-bits of the saved value. First, 110b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner // issue a MFCR to save all of the CRBits. 111e67304fb7880bd55d194d68b827c0eb2366c0a91Chris Lattner BuildMI(MBB, MI, PPC::MFCR, 0, PPC::R0); 112b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner 113b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner // If the saved register wasn't CR0, shift the bits left so that they are in 114b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner // CR0's slot. 115b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner if (SrcReg != PPC::CR0) { 116b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner unsigned ShiftBits = PPCRegisterInfo::getRegisterNumbering(SrcReg)*4; 117e67304fb7880bd55d194d68b827c0eb2366c0a91Chris Lattner // rlwinm r0, r0, ShiftBits, 0, 31. 118e67304fb7880bd55d194d68b827c0eb2366c0a91Chris Lattner BuildMI(MBB, MI, PPC::RLWINM, 4, PPC::R0) 119e67304fb7880bd55d194d68b827c0eb2366c0a91Chris Lattner .addReg(PPC::R0).addImm(ShiftBits).addImm(0).addImm(31); 120b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner } 121b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner 122e67304fb7880bd55d194d68b827c0eb2366c0a91Chris Lattner addFrameReference(BuildMI(MBB, MI, PPC::STW, 3).addReg(PPC::R0), FrameIdx); 1231d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } else if (RC == PPC::GPRCRegisterClass) { 124919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner addFrameReference(BuildMI(MBB, MI, PPC::STW, 3).addReg(SrcReg),FrameIdx); 1251d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } else if (RC == PPC::G8RCRegisterClass) { 1261d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman addFrameReference(BuildMI(MBB, MI, PPC::STD, 3).addReg(SrcReg),FrameIdx); 1271d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } else if (RC == PPC::F8RCRegisterClass) { 128919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner addFrameReference(BuildMI(MBB, MI, PPC::STFD, 3).addReg(SrcReg),FrameIdx); 1291d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } else if (RC == PPC::F4RCRegisterClass) { 130919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner addFrameReference(BuildMI(MBB, MI, PPC::STFS, 3).addReg(SrcReg),FrameIdx); 1319c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner } else if (RC == PPC::VRRCRegisterClass) { 1329c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner // We don't have indexed addressing for vector loads. Emit: 1339c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner // R11 = ADDI FI# 1349c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner // Dest = LVX R0, R11 1359c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner // 1369c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner // FIXME: We use R0 here, because it isn't available for RA. 137e45aa737ba902a5caf2f259b3116bfc7d29b2990Chris Lattner addFrameReference(BuildMI(MBB, MI, PPC::ADDI, 1, PPC::R0), FrameIdx, 0, 0); 1389c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner BuildMI(MBB, MI, PPC::STVX, 3) 1399c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner .addReg(SrcReg).addReg(PPC::R0).addReg(PPC::R0); 140f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } else { 141919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner assert(0 && "Unknown regclass!"); 142919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner abort(); 143f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } 144f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman} 145f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 146f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukmanvoid 14721e463b2bf864671a87ebe386cb100ef9349a540Nate BegemanPPCRegisterInfo::loadRegFromStackSlot(MachineBasicBlock &MBB, 148f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman MachineBasicBlock::iterator MI, 149b48d2cf5eb4a2576314490e43bef0ac0d87732b2Chris Lattner unsigned DestReg, int FrameIdx, 150b48d2cf5eb4a2576314490e43bef0ac0d87732b2Chris Lattner const TargetRegisterClass *RC) const { 151f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman if (DestReg == PPC::LR) { 152919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner addFrameReference(BuildMI(MBB, MI, PPC::LWZ, 2, PPC::R11), FrameIdx); 153f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman BuildMI(MBB, MI, PPC::MTLR, 1).addReg(PPC::R11); 1541d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } else if (RC == PPC::CRRCRegisterClass) { 155e67304fb7880bd55d194d68b827c0eb2366c0a91Chris Lattner // FIXME: We use R0 here, because it isn't available for RA. 156e67304fb7880bd55d194d68b827c0eb2366c0a91Chris Lattner addFrameReference(BuildMI(MBB, MI, PPC::LWZ, 2, PPC::R0), FrameIdx); 157b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner 158b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner // If the reloaded register isn't CR0, shift the bits right so that they are 159b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner // in the right CR's slot. 160b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner if (DestReg != PPC::CR0) { 161b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner unsigned ShiftBits = PPCRegisterInfo::getRegisterNumbering(DestReg)*4; 162b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner // rlwinm r11, r11, 32-ShiftBits, 0, 31. 163e67304fb7880bd55d194d68b827c0eb2366c0a91Chris Lattner BuildMI(MBB, MI, PPC::RLWINM, 4, PPC::R0) 164e67304fb7880bd55d194d68b827c0eb2366c0a91Chris Lattner .addReg(PPC::R0).addImm(32-ShiftBits).addImm(0).addImm(31); 165b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner } 166b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner 167e67304fb7880bd55d194d68b827c0eb2366c0a91Chris Lattner BuildMI(MBB, MI, PPC::MTCRF, 1, DestReg).addReg(PPC::R0); 1681d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } else if (RC == PPC::GPRCRegisterClass) { 169919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner addFrameReference(BuildMI(MBB, MI, PPC::LWZ, 2, DestReg), FrameIdx); 1701d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } else if (RC == PPC::G8RCRegisterClass) { 1711d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman addFrameReference(BuildMI(MBB, MI, PPC::LD, 2, DestReg), FrameIdx); 1721d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } else if (RC == PPC::F8RCRegisterClass) { 173919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner addFrameReference(BuildMI(MBB, MI, PPC::LFD, 2, DestReg), FrameIdx); 1741d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } else if (RC == PPC::F4RCRegisterClass) { 175919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner addFrameReference(BuildMI(MBB, MI, PPC::LFS, 2, DestReg), FrameIdx); 1769c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner } else if (RC == PPC::VRRCRegisterClass) { 1779c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner // We don't have indexed addressing for vector loads. Emit: 1789c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner // R11 = ADDI FI# 1799c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner // Dest = LVX R0, R11 1809c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner // 1819c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner // FIXME: We use R0 here, because it isn't available for RA. 182e45aa737ba902a5caf2f259b3116bfc7d29b2990Chris Lattner addFrameReference(BuildMI(MBB, MI, PPC::ADDI, 1, PPC::R0), FrameIdx, 0, 0); 1839c09c9ec9dab61450800b42cbf746164aa076b88Chris Lattner BuildMI(MBB, MI, PPC::LVX, 2, DestReg).addReg(PPC::R0).addReg(PPC::R0); 184f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } else { 185919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner assert(0 && "Unknown regclass!"); 186919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner abort(); 187f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } 188f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman} 189f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 19021e463b2bf864671a87ebe386cb100ef9349a540Nate Begemanvoid PPCRegisterInfo::copyRegToReg(MachineBasicBlock &MBB, 19121e463b2bf864671a87ebe386cb100ef9349a540Nate Begeman MachineBasicBlock::iterator MI, 19221e463b2bf864671a87ebe386cb100ef9349a540Nate Begeman unsigned DestReg, unsigned SrcReg, 19321e463b2bf864671a87ebe386cb100ef9349a540Nate Begeman const TargetRegisterClass *RC) const { 1941d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman if (RC == PPC::GPRCRegisterClass) { 195b410dc99774d52b4491750dab10b91cca1d661d8Chris Lattner BuildMI(MBB, MI, PPC::OR, 2, DestReg).addReg(SrcReg).addReg(SrcReg); 1961d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } else if (RC == PPC::G8RCRegisterClass) { 1971d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman BuildMI(MBB, MI, PPC::OR8, 2, DestReg).addReg(SrcReg).addReg(SrcReg); 1981d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } else if (RC == PPC::F4RCRegisterClass) { 199919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner BuildMI(MBB, MI, PPC::FMRS, 1, DestReg).addReg(SrcReg); 2001d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } else if (RC == PPC::F8RCRegisterClass) { 201919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner BuildMI(MBB, MI, PPC::FMRD, 1, DestReg).addReg(SrcReg); 2021d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } else if (RC == PPC::CRRCRegisterClass) { 2037af0248af47fbd86ec65d308adda22ec367accc4Nate Begeman BuildMI(MBB, MI, PPC::MCRF, 1, DestReg).addReg(SrcReg); 204335fd3c7c2057b4e5fedb3161df44d7bc1759791Chris Lattner } else if (RC == PPC::VRRCRegisterClass) { 205335fd3c7c2057b4e5fedb3161df44d7bc1759791Chris Lattner BuildMI(MBB, MI, PPC::VOR, 2, DestReg).addReg(SrcReg).addReg(SrcReg); 2067af0248af47fbd86ec65d308adda22ec367accc4Nate Begeman } else { 207f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman std::cerr << "Attempt to copy register that is not GPR or FPR"; 208f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman abort(); 209f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } 210f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman} 211f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 2120f3ac8d8d4ce23eb2ae6f9d850f389250874eea5Evan Chengconst unsigned* PPCRegisterInfo::getCalleeSaveRegs() const { 213804e06704261f233111913a047ef7f7dec1b8725Chris Lattner // 32-bit Darwin calling convention. 214804e06704261f233111913a047ef7f7dec1b8725Chris Lattner static const unsigned Darwin32_CalleeSaveRegs[] = { 215804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::R1 , PPC::R13, PPC::R14, PPC::R15, 216804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::R16, PPC::R17, PPC::R18, PPC::R19, 217804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::R20, PPC::R21, PPC::R22, PPC::R23, 218804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::R24, PPC::R25, PPC::R26, PPC::R27, 219804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::R28, PPC::R29, PPC::R30, PPC::R31, 220804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 221804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::F14, PPC::F15, PPC::F16, PPC::F17, 222804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::F18, PPC::F19, PPC::F20, PPC::F21, 223804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::F22, PPC::F23, PPC::F24, PPC::F25, 224804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::F26, PPC::F27, PPC::F28, PPC::F29, 225804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::F30, PPC::F31, 226804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 227804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::CR2, PPC::CR3, PPC::CR4, 228804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::V20, PPC::V21, PPC::V22, PPC::V23, 229804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::V24, PPC::V25, PPC::V26, PPC::V27, 230804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::V28, PPC::V29, PPC::V30, PPC::V31, 231804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 232804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::LR, 0 233804e06704261f233111913a047ef7f7dec1b8725Chris Lattner }; 234804e06704261f233111913a047ef7f7dec1b8725Chris Lattner // 64-bit Darwin calling convention. 235804e06704261f233111913a047ef7f7dec1b8725Chris Lattner static const unsigned Darwin64_CalleeSaveRegs[] = { 236804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::X1 , PPC::X13, PPC::X14, PPC::X15, 237804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::X16, PPC::X17, PPC::X18, PPC::X19, 238804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::X20, PPC::X21, PPC::X22, PPC::X23, 239804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::X24, PPC::X25, PPC::X26, PPC::X27, 240804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::X28, PPC::X29, PPC::X30, PPC::X31, 241804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 242804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::F14, PPC::F15, PPC::F16, PPC::F17, 243804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::F18, PPC::F19, PPC::F20, PPC::F21, 244804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::F22, PPC::F23, PPC::F24, PPC::F25, 245804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::F26, PPC::F27, PPC::F28, PPC::F29, 2460f3ac8d8d4ce23eb2ae6f9d850f389250874eea5Evan Cheng PPC::F30, PPC::F31, 247804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 248804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::CR2, PPC::CR3, PPC::CR4, 249804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::V20, PPC::V21, PPC::V22, PPC::V23, 250804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::V24, PPC::V25, PPC::V26, PPC::V27, 251804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::V28, PPC::V29, PPC::V30, PPC::V31, 252804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 253804e06704261f233111913a047ef7f7dec1b8725Chris Lattner PPC::LR, 0 2540f3ac8d8d4ce23eb2ae6f9d850f389250874eea5Evan Cheng }; 255804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 256804e06704261f233111913a047ef7f7dec1b8725Chris Lattner return Subtarget.isPPC64() ? Darwin64_CalleeSaveRegs : 257804e06704261f233111913a047ef7f7dec1b8725Chris Lattner Darwin32_CalleeSaveRegs; 2580f3ac8d8d4ce23eb2ae6f9d850f389250874eea5Evan Cheng} 2590f3ac8d8d4ce23eb2ae6f9d850f389250874eea5Evan Cheng 2600f3ac8d8d4ce23eb2ae6f9d850f389250874eea5Evan Chengconst TargetRegisterClass* const* 2610f3ac8d8d4ce23eb2ae6f9d850f389250874eea5Evan ChengPPCRegisterInfo::getCalleeSaveRegClasses() const { 262804e06704261f233111913a047ef7f7dec1b8725Chris Lattner // 32-bit Darwin calling convention. 263804e06704261f233111913a047ef7f7dec1b8725Chris Lattner static const TargetRegisterClass * const Darwin32_CalleeSaveRegClasses[] = { 264804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass, 265804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass, 266804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass, 267804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass, 268804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass, 269804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 270804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass, 271804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass, 272804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass, 273804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass, 274804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::F8RCRegClass,&PPC::F8RCRegClass, 275804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 276804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::CRRCRegClass,&PPC::CRRCRegClass,&PPC::CRRCRegClass, 277804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 278804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass, 279804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass, 280804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass, 281804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 282804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::GPRCRegClass, 0 283804e06704261f233111913a047ef7f7dec1b8725Chris Lattner }; 284804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 285804e06704261f233111913a047ef7f7dec1b8725Chris Lattner // 64-bit Darwin calling convention. 286804e06704261f233111913a047ef7f7dec1b8725Chris Lattner static const TargetRegisterClass * const Darwin64_CalleeSaveRegClasses[] = { 287804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass, 288804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass, 289804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass, 290804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass, 291804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass, 292804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 293804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass, 294804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass, 295804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass, 296804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass, 297804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::F8RCRegClass,&PPC::F8RCRegClass, 298804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 299804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::CRRCRegClass,&PPC::CRRCRegClass,&PPC::CRRCRegClass, 300804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 301804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass, 302804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass, 303804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass, 304804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 305804e06704261f233111913a047ef7f7dec1b8725Chris Lattner &PPC::GPRCRegClass, 0 3060f3ac8d8d4ce23eb2ae6f9d850f389250874eea5Evan Cheng }; 307804e06704261f233111913a047ef7f7dec1b8725Chris Lattner 308804e06704261f233111913a047ef7f7dec1b8725Chris Lattner return Subtarget.isPPC64() ? Darwin64_CalleeSaveRegClasses : 309804e06704261f233111913a047ef7f7dec1b8725Chris Lattner Darwin32_CalleeSaveRegClasses; 3100f3ac8d8d4ce23eb2ae6f9d850f389250874eea5Evan Cheng} 3110f3ac8d8d4ce23eb2ae6f9d850f389250874eea5Evan Cheng 312f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner/// foldMemoryOperand - PowerPC (like most RISC's) can only fold spills into 313f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner/// copy instructions, turning them into load/store instructions. 31421e463b2bf864671a87ebe386cb100ef9349a540Nate BegemanMachineInstr *PPCRegisterInfo::foldMemoryOperand(MachineInstr *MI, 31521e463b2bf864671a87ebe386cb100ef9349a540Nate Begeman unsigned OpNum, 31621e463b2bf864671a87ebe386cb100ef9349a540Nate Begeman int FrameIndex) const { 317f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner // Make sure this is a reg-reg copy. Note that we can't handle MCRF, because 318f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner // it takes more than one instruction to store it. 319f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner unsigned Opc = MI->getOpcode(); 320f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner 321b410dc99774d52b4491750dab10b91cca1d661d8Chris Lattner if ((Opc == PPC::OR && 322f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner MI->getOperand(1).getReg() == MI->getOperand(2).getReg())) { 323f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner if (OpNum == 0) { // move -> store 324f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner unsigned InReg = MI->getOperand(1).getReg(); 325f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner return addFrameReference(BuildMI(PPC::STW, 326f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner 3).addReg(InReg), FrameIndex); 327c9fe7508a5e072479d4ab5711c60aa5142c64f10Chris Lattner } else { // move -> load 328f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner unsigned OutReg = MI->getOperand(0).getReg(); 329f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner return addFrameReference(BuildMI(PPC::LWZ, 2, OutReg), FrameIndex); 330f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner } 3311d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } else if ((Opc == PPC::OR8 && 3321d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman MI->getOperand(1).getReg() == MI->getOperand(2).getReg())) { 3331d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman if (OpNum == 0) { // move -> store 3341d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman unsigned InReg = MI->getOperand(1).getReg(); 3351d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman return addFrameReference(BuildMI(PPC::STD, 3361d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman 3).addReg(InReg), FrameIndex); 3371d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } else { // move -> load 3381d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman unsigned OutReg = MI->getOperand(0).getReg(); 3391d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman return addFrameReference(BuildMI(PPC::LD, 2, OutReg), FrameIndex); 3401d9d7427c4a4e3c7bdcfd1f725447f355e509c20Nate Begeman } 341919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner } else if (Opc == PPC::FMRD) { 342c9fe7508a5e072479d4ab5711c60aa5142c64f10Chris Lattner if (OpNum == 0) { // move -> store 343c9fe7508a5e072479d4ab5711c60aa5142c64f10Chris Lattner unsigned InReg = MI->getOperand(1).getReg(); 344c9fe7508a5e072479d4ab5711c60aa5142c64f10Chris Lattner return addFrameReference(BuildMI(PPC::STFD, 345c9fe7508a5e072479d4ab5711c60aa5142c64f10Chris Lattner 3).addReg(InReg), FrameIndex); 346c9fe7508a5e072479d4ab5711c60aa5142c64f10Chris Lattner } else { // move -> load 347c9fe7508a5e072479d4ab5711c60aa5142c64f10Chris Lattner unsigned OutReg = MI->getOperand(0).getReg(); 348c9fe7508a5e072479d4ab5711c60aa5142c64f10Chris Lattner return addFrameReference(BuildMI(PPC::LFD, 2, OutReg), FrameIndex); 349c9fe7508a5e072479d4ab5711c60aa5142c64f10Chris Lattner } 350919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner } else if (Opc == PPC::FMRS) { 351919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner if (OpNum == 0) { // move -> store 352919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner unsigned InReg = MI->getOperand(1).getReg(); 353919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner return addFrameReference(BuildMI(PPC::STFS, 354919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner 3).addReg(InReg), FrameIndex); 355919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner } else { // move -> load 356919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner unsigned OutReg = MI->getOperand(0).getReg(); 357919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner return addFrameReference(BuildMI(PPC::LFS, 2, OutReg), FrameIndex); 358919c032fa4511468aadc6f50d6ed9c50890710b3Chris Lattner } 359f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner } 360f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner return 0; 361f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner} 362f38df04c3a0c2aa766fa50b254d2d0fc743f8152Chris Lattner 363f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman//===----------------------------------------------------------------------===// 364f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman// Stack Frame Processing methods 365f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman//===----------------------------------------------------------------------===// 366f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 367f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman// hasFP - Return true if the specified function should have a dedicated frame 368f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman// pointer register. This is true if the function has variable sized allocas or 369f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman// if frame pointer elimination is disabled. 370f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman// 3714f91a4c497fb1032550b7f163004efc5fce1d7f1Chris Lattnerstatic bool hasFP(const MachineFunction &MF) { 3724f91a4c497fb1032550b7f163004efc5fce1d7f1Chris Lattner const MachineFrameInfo *MFI = MF.getFrameInfo(); 3734f91a4c497fb1032550b7f163004efc5fce1d7f1Chris Lattner unsigned TargetAlign = MF.getTarget().getFrameInfo()->getStackAlignment(); 3744f91a4c497fb1032550b7f163004efc5fce1d7f1Chris Lattner 375030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman // If frame pointers are forced, or if there are variable sized stack objects, 376030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman // use a frame pointer. 3774f91a4c497fb1032550b7f163004efc5fce1d7f1Chris Lattner // 378030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman return NoFramePointerElim || MFI->hasVarSizedObjects(); 379f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman} 380f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 38121e463b2bf864671a87ebe386cb100ef9349a540Nate Begemanvoid PPCRegisterInfo:: 382f2ccb77ee9d8ab35866dae111fa36929689c7511Misha BrukmaneliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, 383f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman MachineBasicBlock::iterator I) const { 384f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman if (hasFP(MF)) { 385f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // If we have a frame pointer, convert as follows: 386f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // ADJCALLSTACKDOWN -> addi, r1, r1, -amount 387f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // ADJCALLSTACKUP -> addi, r1, r1, amount 388f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman MachineInstr *Old = I; 389f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman unsigned Amount = Old->getOperand(0).getImmedValue(); 390f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman if (Amount != 0) { 391f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // We need to keep the stack aligned properly. To do this, we round the 392f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // amount of space needed for the outgoing arguments up to the next 393f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // alignment boundary. 394f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman unsigned Align = MF.getTarget().getFrameInfo()->getStackAlignment(); 395f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman Amount = (Amount+Align-1)/Align*Align; 396b5f662fa0314f7e7e690aae8ebff7136cc3a5ab0Misha Brukman 397f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // Replace the pseudo instruction with a new instruction... 398f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman if (Old->getOpcode() == PPC::ADJCALLSTACKDOWN) { 39963b3d7113d93fda622c4954c6b1d046ce029044eChris Lattner BuildMI(MBB, I, PPC::ADDI, 2, PPC::R1).addReg(PPC::R1).addImm(-Amount); 400f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } else { 401f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman assert(Old->getOpcode() == PPC::ADJCALLSTACKUP); 40263b3d7113d93fda622c4954c6b1d046ce029044eChris Lattner BuildMI(MBB, I, PPC::ADDI, 2, PPC::R1).addReg(PPC::R1).addImm(Amount); 403f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } 404f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } 405f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } 406f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman MBB.erase(I); 407f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman} 408f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 409f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukmanvoid 41021e463b2bf864671a87ebe386cb100ef9349a540Nate BegemanPPCRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II) const { 411f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman unsigned i = 0; 412f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman MachineInstr &MI = *II; 413f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman MachineBasicBlock &MBB = *MI.getParent(); 414f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman MachineFunction &MF = *MBB.getParent(); 415b5f662fa0314f7e7e690aae8ebff7136cc3a5ab0Misha Brukman 416f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman while (!MI.getOperand(i).isFrameIndex()) { 417f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman ++i; 418f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman assert(i < MI.getNumOperands() && "Instr doesn't have FrameIndex operand!"); 419f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } 420f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 421f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman int FrameIndex = MI.getOperand(i).getFrameIndex(); 422f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 423f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // Replace the FrameIndex with base register with GPR1 (SP) or GPR31 (FP). 424e53f4a055f74bded20d6129b4724ddd17fd199f6Chris Lattner MI.getOperand(i).ChangeToRegister(hasFP(MF) ? PPC::R31 : PPC::R1); 425f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 426f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // Take into account whether it's an add or mem instruction 427f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman unsigned OffIdx = (i == 2) ? 1 : 2; 428f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 4297ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner // Figure out if the offset in the instruction is shifted right two bits. This 4307ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner // is true for instructions like "STD", which the machine implicitly adds two 4317ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner // low zeros to. 4327ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner bool isIXAddr = false; 4337ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner switch (MI.getOpcode()) { 4347ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner case PPC::LWA: 4357ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner case PPC::LD: 4367ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner case PPC::STD: 4377ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner case PPC::STD_32: 4387ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner isIXAddr = true; 4397ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner break; 4407ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner } 4417ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner 4427ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner 443f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // Now add the frame object offset to the offset from r1. 4447ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner int Offset = MF.getFrameInfo()->getObjectOffset(FrameIndex); 4457ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner 4467ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner if (!isIXAddr) 4477ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner Offset += MI.getOperand(OffIdx).getImmedValue(); 4487ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner else 4497ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner Offset += MI.getOperand(OffIdx).getImmedValue() << 2; 450f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 451f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // If we're not using a Frame Pointer that has been set to the value of the 452f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // SP before having the stack size subtracted from it, then add the stack size 453f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // to Offset to get the correct offset. 454f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman Offset += MF.getFrameInfo()->getStackSize(); 455b5f662fa0314f7e7e690aae8ebff7136cc3a5ab0Misha Brukman 456f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman if (Offset > 32767 || Offset < -32768) { 457f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // Insert a set of r0 with the full offset value before the ld, st, or add 458f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman MachineBasicBlock *MBB = MI.getParent(); 45963b3d7113d93fda622c4954c6b1d046ce029044eChris Lattner BuildMI(*MBB, II, PPC::LIS, 1, PPC::R0).addImm(Offset >> 16); 460c6d48d36a349f593aab2194c141a1e24da1aec3eChris Lattner BuildMI(*MBB, II, PPC::ORI, 2, PPC::R0).addReg(PPC::R0).addImm(Offset); 461c6d48d36a349f593aab2194c141a1e24da1aec3eChris Lattner 462f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // convert into indexed form of the instruction 463f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // sth 0:rA, 1:imm 2:(rB) ==> sthx 0:rA, 2:rB, 1:r0 464f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // addi 0:rA 1:rB, 2, imm ==> add 0:rA, 1:rB, 2:r0 4651463019e84cea6857914cea30c0180ec7289f09fChris Lattner assert(ImmToIdxMap.count(MI.getOpcode()) && 4661463019e84cea6857914cea30c0180ec7289f09fChris Lattner "No indexed form of load or store available!"); 4671463019e84cea6857914cea30c0180ec7289f09fChris Lattner unsigned NewOpcode = ImmToIdxMap.find(MI.getOpcode())->second; 468f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman MI.setOpcode(NewOpcode); 469e53f4a055f74bded20d6129b4724ddd17fd199f6Chris Lattner MI.getOperand(1).ChangeToRegister(MI.getOperand(i).getReg()); 470e53f4a055f74bded20d6129b4724ddd17fd199f6Chris Lattner MI.getOperand(2).ChangeToRegister(PPC::R0); 471f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } else { 4727ffa9abdadd7e51726240b6a8352abda8edde869Chris Lattner if (isIXAddr) { 473841d12d9ac489ec33d933af96d77dd4fc2a4cee2Chris Lattner assert((Offset & 3) == 0 && "Invalid frame offset!"); 474841d12d9ac489ec33d933af96d77dd4fc2a4cee2Chris Lattner Offset >>= 2; // The actual encoded value has the low two bits zero. 475841d12d9ac489ec33d933af96d77dd4fc2a4cee2Chris Lattner } 476e53f4a055f74bded20d6129b4724ddd17fd199f6Chris Lattner MI.getOperand(OffIdx).ChangeToImmediate(Offset); 477f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } 478f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman} 479f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 480f7d2372b7407c7f8966df39a2b5a067c72bd6b9bChris Lattner/// VRRegNo - Map from a numbered VR register to its enum value. 481f7d2372b7407c7f8966df39a2b5a067c72bd6b9bChris Lattner/// 482f7d2372b7407c7f8966df39a2b5a067c72bd6b9bChris Lattnerstatic const unsigned short VRRegNo[] = { 483b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner PPC::V0 , PPC::V1 , PPC::V2 , PPC::V3 , PPC::V4 , PPC::V5 , PPC::V6 , PPC::V7 , 484b47e0897a090d31d952957ba873db6c1e487b50eChris Lattner PPC::V8 , PPC::V9 , PPC::V10, PPC::V11, PPC::V12, PPC::V13, PPC::V14, PPC::V15, 485f7d2372b7407c7f8966df39a2b5a067c72bd6b9bChris Lattner PPC::V16, PPC::V17, PPC::V18, PPC::V19, PPC::V20, PPC::V21, PPC::V22, PPC::V23, 486f7d2372b7407c7f8966df39a2b5a067c72bd6b9bChris Lattner PPC::V24, PPC::V25, PPC::V26, PPC::V27, PPC::V28, PPC::V29, PPC::V30, PPC::V31 487f7d2372b7407c7f8966df39a2b5a067c72bd6b9bChris Lattner}; 488f7d2372b7407c7f8966df39a2b5a067c72bd6b9bChris Lattner 489f9568d8700d5389799796262cde313bb5c7d588aChris Lattner/// RemoveVRSaveCode - We have found that this function does not need any code 490f9568d8700d5389799796262cde313bb5c7d588aChris Lattner/// to manipulate the VRSAVE register, even though it uses vector registers. 491f9568d8700d5389799796262cde313bb5c7d588aChris Lattner/// This can happen when the only registers used are known to be live in or out 492f9568d8700d5389799796262cde313bb5c7d588aChris Lattner/// of the function. Remove all of the VRSAVE related code from the function. 493f9568d8700d5389799796262cde313bb5c7d588aChris Lattnerstatic void RemoveVRSaveCode(MachineInstr *MI) { 494f9568d8700d5389799796262cde313bb5c7d588aChris Lattner MachineBasicBlock *Entry = MI->getParent(); 495f9568d8700d5389799796262cde313bb5c7d588aChris Lattner MachineFunction *MF = Entry->getParent(); 496f9568d8700d5389799796262cde313bb5c7d588aChris Lattner 497f9568d8700d5389799796262cde313bb5c7d588aChris Lattner // We know that the MTVRSAVE instruction immediately follows MI. Remove it. 498f9568d8700d5389799796262cde313bb5c7d588aChris Lattner MachineBasicBlock::iterator MBBI = MI; 499f9568d8700d5389799796262cde313bb5c7d588aChris Lattner ++MBBI; 500f9568d8700d5389799796262cde313bb5c7d588aChris Lattner assert(MBBI != Entry->end() && MBBI->getOpcode() == PPC::MTVRSAVE); 501f9568d8700d5389799796262cde313bb5c7d588aChris Lattner MBBI->eraseFromParent(); 502f9568d8700d5389799796262cde313bb5c7d588aChris Lattner 503f9568d8700d5389799796262cde313bb5c7d588aChris Lattner bool RemovedAllMTVRSAVEs = true; 504f9568d8700d5389799796262cde313bb5c7d588aChris Lattner // See if we can find and remove the MTVRSAVE instruction from all of the 505f9568d8700d5389799796262cde313bb5c7d588aChris Lattner // epilog blocks. 506f9568d8700d5389799796262cde313bb5c7d588aChris Lattner const TargetInstrInfo &TII = *MF->getTarget().getInstrInfo(); 507f9568d8700d5389799796262cde313bb5c7d588aChris Lattner for (MachineFunction::iterator I = MF->begin(), E = MF->end(); I != E; ++I) { 508f9568d8700d5389799796262cde313bb5c7d588aChris Lattner // If last instruction is a return instruction, add an epilogue 509f9568d8700d5389799796262cde313bb5c7d588aChris Lattner if (!I->empty() && TII.isReturn(I->back().getOpcode())) { 510f9568d8700d5389799796262cde313bb5c7d588aChris Lattner bool FoundIt = false; 511f9568d8700d5389799796262cde313bb5c7d588aChris Lattner for (MBBI = I->end(); MBBI != I->begin(); ) { 512f9568d8700d5389799796262cde313bb5c7d588aChris Lattner --MBBI; 513f9568d8700d5389799796262cde313bb5c7d588aChris Lattner if (MBBI->getOpcode() == PPC::MTVRSAVE) { 514f9568d8700d5389799796262cde313bb5c7d588aChris Lattner MBBI->eraseFromParent(); // remove it. 515f9568d8700d5389799796262cde313bb5c7d588aChris Lattner FoundIt = true; 516f9568d8700d5389799796262cde313bb5c7d588aChris Lattner break; 517f9568d8700d5389799796262cde313bb5c7d588aChris Lattner } 518f9568d8700d5389799796262cde313bb5c7d588aChris Lattner } 519f9568d8700d5389799796262cde313bb5c7d588aChris Lattner RemovedAllMTVRSAVEs &= FoundIt; 520f9568d8700d5389799796262cde313bb5c7d588aChris Lattner } 521f9568d8700d5389799796262cde313bb5c7d588aChris Lattner } 522f9568d8700d5389799796262cde313bb5c7d588aChris Lattner 523f9568d8700d5389799796262cde313bb5c7d588aChris Lattner // If we found and removed all MTVRSAVE instructions, remove the read of 524f9568d8700d5389799796262cde313bb5c7d588aChris Lattner // VRSAVE as well. 525f9568d8700d5389799796262cde313bb5c7d588aChris Lattner if (RemovedAllMTVRSAVEs) { 526f9568d8700d5389799796262cde313bb5c7d588aChris Lattner MBBI = MI; 527f9568d8700d5389799796262cde313bb5c7d588aChris Lattner assert(MBBI != Entry->begin() && "UPDATE_VRSAVE is first instr in block?"); 528f9568d8700d5389799796262cde313bb5c7d588aChris Lattner --MBBI; 529f9568d8700d5389799796262cde313bb5c7d588aChris Lattner assert(MBBI->getOpcode() == PPC::MFVRSAVE && "VRSAVE instrs wandered?"); 530f9568d8700d5389799796262cde313bb5c7d588aChris Lattner MBBI->eraseFromParent(); 531f9568d8700d5389799796262cde313bb5c7d588aChris Lattner } 532f9568d8700d5389799796262cde313bb5c7d588aChris Lattner 533f9568d8700d5389799796262cde313bb5c7d588aChris Lattner // Finally, nuke the UPDATE_VRSAVE. 534f9568d8700d5389799796262cde313bb5c7d588aChris Lattner MI->eraseFromParent(); 535f9568d8700d5389799796262cde313bb5c7d588aChris Lattner} 536f9568d8700d5389799796262cde313bb5c7d588aChris Lattner 5371877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner// HandleVRSaveUpdate - MI is the UPDATE_VRSAVE instruction introduced by the 5381877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner// instruction selector. Based on the vector registers that have been used, 5391877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner// transform this into the appropriate ORI instruction. 5401877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattnerstatic void HandleVRSaveUpdate(MachineInstr *MI, const bool *UsedRegs) { 5411877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner unsigned UsedRegMask = 0; 542f7d2372b7407c7f8966df39a2b5a067c72bd6b9bChris Lattner for (unsigned i = 0; i != 32; ++i) 543f7d2372b7407c7f8966df39a2b5a067c72bd6b9bChris Lattner if (UsedRegs[VRRegNo[i]]) 544f7d2372b7407c7f8966df39a2b5a067c72bd6b9bChris Lattner UsedRegMask |= 1 << (31-i); 545f7d2372b7407c7f8966df39a2b5a067c72bd6b9bChris Lattner 546402504b1ba250839102ba384be0210d248b6e3e8Chris Lattner // Live in and live out values already must be in the mask, so don't bother 547402504b1ba250839102ba384be0210d248b6e3e8Chris Lattner // marking them. 548402504b1ba250839102ba384be0210d248b6e3e8Chris Lattner MachineFunction *MF = MI->getParent()->getParent(); 549402504b1ba250839102ba384be0210d248b6e3e8Chris Lattner for (MachineFunction::livein_iterator I = 550402504b1ba250839102ba384be0210d248b6e3e8Chris Lattner MF->livein_begin(), E = MF->livein_end(); I != E; ++I) { 551402504b1ba250839102ba384be0210d248b6e3e8Chris Lattner unsigned RegNo = PPCRegisterInfo::getRegisterNumbering(I->first); 552402504b1ba250839102ba384be0210d248b6e3e8Chris Lattner if (VRRegNo[RegNo] == I->first) // If this really is a vector reg. 553402504b1ba250839102ba384be0210d248b6e3e8Chris Lattner UsedRegMask &= ~(1 << (31-RegNo)); // Doesn't need to be marked. 554402504b1ba250839102ba384be0210d248b6e3e8Chris Lattner } 555402504b1ba250839102ba384be0210d248b6e3e8Chris Lattner for (MachineFunction::liveout_iterator I = 556402504b1ba250839102ba384be0210d248b6e3e8Chris Lattner MF->liveout_begin(), E = MF->liveout_end(); I != E; ++I) { 557402504b1ba250839102ba384be0210d248b6e3e8Chris Lattner unsigned RegNo = PPCRegisterInfo::getRegisterNumbering(*I); 558402504b1ba250839102ba384be0210d248b6e3e8Chris Lattner if (VRRegNo[RegNo] == *I) // If this really is a vector reg. 559402504b1ba250839102ba384be0210d248b6e3e8Chris Lattner UsedRegMask &= ~(1 << (31-RegNo)); // Doesn't need to be marked. 560402504b1ba250839102ba384be0210d248b6e3e8Chris Lattner } 561402504b1ba250839102ba384be0210d248b6e3e8Chris Lattner 5621877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner unsigned SrcReg = MI->getOperand(1).getReg(); 5631877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner unsigned DstReg = MI->getOperand(0).getReg(); 5641877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner // If no registers are used, turn this into a copy. 5651877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner if (UsedRegMask == 0) { 566f9568d8700d5389799796262cde313bb5c7d588aChris Lattner // Remove all VRSAVE code. 567f9568d8700d5389799796262cde313bb5c7d588aChris Lattner RemoveVRSaveCode(MI); 568f9568d8700d5389799796262cde313bb5c7d588aChris Lattner return; 5691877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner } else if ((UsedRegMask & 0xFFFF) == UsedRegMask) { 5701877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner BuildMI(*MI->getParent(), MI, PPC::ORI, 2, DstReg) 5711877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner .addReg(SrcReg).addImm(UsedRegMask); 5721877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner } else if ((UsedRegMask & 0xFFFF0000) == UsedRegMask) { 5731877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner BuildMI(*MI->getParent(), MI, PPC::ORIS, 2, DstReg) 5741877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner .addReg(SrcReg).addImm(UsedRegMask >> 16); 5751877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner } else { 5761877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner BuildMI(*MI->getParent(), MI, PPC::ORIS, 2, DstReg) 5771877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner .addReg(SrcReg).addImm(UsedRegMask >> 16); 5781877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner BuildMI(*MI->getParent(), MI, PPC::ORI, 2, DstReg) 5791877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner .addReg(DstReg).addImm(UsedRegMask & 0xFFFF); 5801877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner } 5811877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner 5821877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner // Remove the old UPDATE_VRSAVE instruction. 583f9568d8700d5389799796262cde313bb5c7d588aChris Lattner MI->eraseFromParent(); 5841877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner} 5851877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner 586f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 58721e463b2bf864671a87ebe386cb100ef9349a540Nate Begemanvoid PPCRegisterInfo::emitPrologue(MachineFunction &MF) const { 588f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman MachineBasicBlock &MBB = MF.front(); // Prolog goes in entry BB 589f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman MachineBasicBlock::iterator MBBI = MBB.begin(); 590f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman MachineFrameInfo *MFI = MF.getFrameInfo(); 5914188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey MachineDebugInfo *DebugInfo = MFI->getMachineDebugInfo(); 5924f91a4c497fb1032550b7f163004efc5fce1d7f1Chris Lattner 5934f91a4c497fb1032550b7f163004efc5fce1d7f1Chris Lattner // Do we have a frame pointer for this function? 5944f91a4c497fb1032550b7f163004efc5fce1d7f1Chris Lattner bool HasFP = hasFP(MF); 595b5f662fa0314f7e7e690aae8ebff7136cc3a5ab0Misha Brukman 5964f91a4c497fb1032550b7f163004efc5fce1d7f1Chris Lattner // Scan the prolog, looking for an UPDATE_VRSAVE instruction. If we find it, 5974f91a4c497fb1032550b7f163004efc5fce1d7f1Chris Lattner // process it. 5988aa777d5ea8e73e2edf79fd35fd6b5c4e9949ca7Chris Lattner for (unsigned i = 0; MBBI != MBB.end(); ++i, ++MBBI) { 5991877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner if (MBBI->getOpcode() == PPC::UPDATE_VRSAVE) { 6001877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner HandleVRSaveUpdate(MBBI, MF.getUsedPhysregs()); 6011877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner break; 6021877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner } 6031877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner } 6041877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner 6051877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner // Move MBBI back to the beginning of the function. 6061877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner MBBI = MBB.begin(); 6071877ec9b02511e111998596b9ba9c3a2275d6a92Chris Lattner 608f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // Get the number of bytes to allocate from the FrameInfo 609f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman unsigned NumBytes = MFI->getStackSize(); 610ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman 611ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman // Get the alignments provided by the target, and the maximum alignment 612ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman // (if any) of the fixed frame objects. 613ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman unsigned TargetAlign = MF.getTarget().getFrameInfo()->getStackAlignment(); 614ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman unsigned MaxAlign = MFI->getMaxAlignment(); 615f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 616f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // If we have calls, we cannot use the red zone to store callee save registers 617f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // and we must set up a stack frame, so calculate the necessary size here. 618f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman if (MFI->hasCalls()) { 619b5f662fa0314f7e7e690aae8ebff7136cc3a5ab0Misha Brukman // We reserve argument space for call sites in the function immediately on 620b5f662fa0314f7e7e690aae8ebff7136cc3a5ab0Misha Brukman // entry to the current function. This eliminates the need for add/sub 621f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // brackets around call sites. 622f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman NumBytes += MFI->getMaxCallFrameSize(); 623f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } 624f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 625d29b6aa608d69f19b57ebd2ae630b040b1c4951dJeff Cohen // If we are a leaf function, and use up to 224 bytes of stack space, 62654eed36da595f09c46a46b2b0b15757ea486b4c1Nate Begeman // and don't have a frame pointer, then we do not need to adjust the stack 62754eed36da595f09c46a46b2b0b15757ea486b4c1Nate Begeman // pointer (we fit in the Red Zone). 6284f91a4c497fb1032550b7f163004efc5fce1d7f1Chris Lattner if ((NumBytes == 0) || (NumBytes <= 224 && !HasFP && !MFI->hasCalls() && 629ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman MaxAlign <= TargetAlign)) { 63054eed36da595f09c46a46b2b0b15757ea486b4c1Nate Begeman MFI->setStackSize(0); 63154eed36da595f09c46a46b2b0b15757ea486b4c1Nate Begeman return; 63254eed36da595f09c46a46b2b0b15757ea486b4c1Nate Begeman } 633f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 634b5f662fa0314f7e7e690aae8ebff7136cc3a5ab0Misha Brukman // Add the size of R1 to NumBytes size for the store of R1 to the bottom 635f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // of the stack and round the size to a multiple of the alignment. 636ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman unsigned Align = std::max(TargetAlign, MaxAlign); 6375802be13e0eb0f6730b75fee2ea0b3cf6cb148a4Chris Lattner unsigned GPRSize = 4; 6384f91a4c497fb1032550b7f163004efc5fce1d7f1Chris Lattner unsigned Size = HasFP ? GPRSize + GPRSize : GPRSize; 639f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman NumBytes = (NumBytes+Size+Align-1)/Align*Align; 640f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 641f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman // Update frame info to pretend that this is part of the stack... 642f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman MFI->setStackSize(NumBytes); 6434188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey int NegNumbytes = -NumBytes; 644f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 6453dee17581c38ce598376e83666c54a6b5d96ef05Nate Begeman // Adjust stack pointer: r1 -= numbytes. 646030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman // If there is a preferred stack alignment, align R1 now 647030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman if (MaxAlign > TargetAlign) { 648030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman assert(isPowerOf2_32(MaxAlign) && MaxAlign < 32767 && "Invalid alignment!"); 6493e6a35076ed072525d3eda1945033863b613aef8Chris Lattner assert(isInt16(0-NumBytes) && "Unhandled stack size and alignment!"); 650030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman BuildMI(MBB, MBBI, PPC::RLWINM, 4, PPC::R0) 651030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman .addReg(PPC::R1).addImm(0).addImm(32-Log2_32(MaxAlign)).addImm(31); 652218629813a47d3e398f37b5be284e179a0ec855fNate Begeman BuildMI(MBB, MBBI, PPC::SUBFIC,2,PPC::R0).addReg(PPC::R0) 6533e6a35076ed072525d3eda1945033863b613aef8Chris Lattner .addImm(0-NumBytes); 654030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman BuildMI(MBB, MBBI, PPC::STWUX, 3) 655030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman .addReg(PPC::R1).addReg(PPC::R1).addReg(PPC::R0); 656030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman } else if (NumBytes <= 32768) { 65763b3d7113d93fda622c4954c6b1d046ce029044eChris Lattner BuildMI(MBB, MBBI, PPC::STWU, 3).addReg(PPC::R1).addImm(NegNumbytes) 658030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman .addReg(PPC::R1); 659f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } else { 66063b3d7113d93fda622c4954c6b1d046ce029044eChris Lattner BuildMI(MBB, MBBI, PPC::LIS, 1, PPC::R0).addImm(NegNumbytes >> 16); 661030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman BuildMI(MBB, MBBI, PPC::ORI, 2, PPC::R0).addReg(PPC::R0) 662030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman .addImm(NegNumbytes & 0xFFFF); 663030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman BuildMI(MBB, MBBI, PPC::STWUX, 3).addReg(PPC::R1).addReg(PPC::R1) 664030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman .addReg(PPC::R0); 665f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } 666ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman 66752fa2449c9c1c8f8373faccb8968588211101e68Jim Laskey if (DebugInfo && DebugInfo->hasInfo()) { 6684188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey std::vector<MachineMove *> &Moves = DebugInfo->getFrameMoves(); 6694188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey unsigned LabelID = DebugInfo->NextLabelID(); 6704188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey 6714c2c9031acd1314440cdd0952182fa39b4efe90dJim Laskey // Mark effective beginning of when frame pointer becomes valid. 67263b3d7113d93fda622c4954c6b1d046ce029044eChris Lattner BuildMI(MBB, MBBI, PPC::DWARF_LABEL, 1).addImm(LabelID); 6734c2c9031acd1314440cdd0952182fa39b4efe90dJim Laskey 674ce50a165c784d71abf1b2f981be18f867787d972Jim Laskey // Show update of SP. 675ce50a165c784d71abf1b2f981be18f867787d972Jim Laskey MachineLocation SPDst(MachineLocation::VirtualFP); 676ce50a165c784d71abf1b2f981be18f867787d972Jim Laskey MachineLocation SPSrc(MachineLocation::VirtualFP, NegNumbytes); 677ce50a165c784d71abf1b2f981be18f867787d972Jim Laskey Moves.push_back(new MachineMove(LabelID, SPDst, SPSrc)); 678ce50a165c784d71abf1b2f981be18f867787d972Jim Laskey 679ce50a165c784d71abf1b2f981be18f867787d972Jim Laskey // Add callee saved registers to move list. 680ce50a165c784d71abf1b2f981be18f867787d972Jim Laskey const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo(); 681ce50a165c784d71abf1b2f981be18f867787d972Jim Laskey for (unsigned I = 0, E = CSI.size(); I != E; ++I) { 682ce50a165c784d71abf1b2f981be18f867787d972Jim Laskey MachineLocation CSDst(MachineLocation::VirtualFP, 683ce50a165c784d71abf1b2f981be18f867787d972Jim Laskey MFI->getObjectOffset(CSI[I].getFrameIdx())); 684ce50a165c784d71abf1b2f981be18f867787d972Jim Laskey MachineLocation CSSrc(CSI[I].getReg()); 685ce50a165c784d71abf1b2f981be18f867787d972Jim Laskey Moves.push_back(new MachineMove(LabelID, CSDst, CSSrc)); 686ce50a165c784d71abf1b2f981be18f867787d972Jim Laskey } 6874188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey } 6884188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey 689ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman // If there is a frame pointer, copy R1 (SP) into R31 (FP) 6904f91a4c497fb1032550b7f163004efc5fce1d7f1Chris Lattner if (HasFP) { 691c6d48d36a349f593aab2194c141a1e24da1aec3eChris Lattner BuildMI(MBB, MBBI, PPC::STW, 3) 69263b3d7113d93fda622c4954c6b1d046ce029044eChris Lattner .addReg(PPC::R31).addImm(GPRSize).addReg(PPC::R1); 693b410dc99774d52b4491750dab10b91cca1d661d8Chris Lattner BuildMI(MBB, MBBI, PPC::OR, 2, PPC::R31).addReg(PPC::R1).addReg(PPC::R1); 694f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } 695f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman} 696f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 69721e463b2bf864671a87ebe386cb100ef9349a540Nate Begemanvoid PPCRegisterInfo::emitEpilogue(MachineFunction &MF, 69821e463b2bf864671a87ebe386cb100ef9349a540Nate Begeman MachineBasicBlock &MBB) const { 699f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman MachineBasicBlock::iterator MBBI = prior(MBB.end()); 7006da8d99f70826552b3a4e7bd5d1376881574b4b1Evan Cheng assert(MBBI->getOpcode() == PPC::BLR && 701f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman "Can only insert epilog into returning blocks"); 702b5f662fa0314f7e7e690aae8ebff7136cc3a5ab0Misha Brukman 703030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman // Get alignment info so we know how to restore r1 704030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman const MachineFrameInfo *MFI = MF.getFrameInfo(); 705030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman unsigned TargetAlign = MF.getTarget().getFrameInfo()->getStackAlignment(); 706030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman 70764da172b1435d132ce867dcd5c652577664b55a3Chris Lattner // Get the number of bytes allocated from the FrameInfo. 708030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman unsigned NumBytes = MFI->getStackSize(); 70964da172b1435d132ce867dcd5c652577664b55a3Chris Lattner unsigned GPRSize = 4; 710f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 711f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman if (NumBytes != 0) { 71264da172b1435d132ce867dcd5c652577664b55a3Chris Lattner // If this function has a frame pointer, load the saved stack pointer from 71364da172b1435d132ce867dcd5c652577664b55a3Chris Lattner // its stack slot. 714f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman if (hasFP(MF)) { 71564da172b1435d132ce867dcd5c652577664b55a3Chris Lattner BuildMI(MBB, MBBI, PPC::LWZ, 2, PPC::R31) 71663b3d7113d93fda622c4954c6b1d046ce029044eChris Lattner .addImm(GPRSize).addReg(PPC::R31); 71764da172b1435d132ce867dcd5c652577664b55a3Chris Lattner } 71864da172b1435d132ce867dcd5c652577664b55a3Chris Lattner 71964da172b1435d132ce867dcd5c652577664b55a3Chris Lattner // The loaded (or persistent) stack pointer value is offseted by the 'stwu' 72064da172b1435d132ce867dcd5c652577664b55a3Chris Lattner // on entry to the function. Add this offset back now. 721030514cd96e9b8bb08fd9585d890bd7a5f0dbb77Nate Begeman if (NumBytes < 32768 && TargetAlign >= MFI->getMaxAlignment()) { 72264da172b1435d132ce867dcd5c652577664b55a3Chris Lattner BuildMI(MBB, MBBI, PPC::ADDI, 2, PPC::R1) 72363b3d7113d93fda622c4954c6b1d046ce029044eChris Lattner .addReg(PPC::R1).addImm(NumBytes); 72464da172b1435d132ce867dcd5c652577664b55a3Chris Lattner } else { 72563b3d7113d93fda622c4954c6b1d046ce029044eChris Lattner BuildMI(MBB, MBBI, PPC::LWZ, 2, PPC::R1).addImm(0).addReg(PPC::R1); 726f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } 727f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman } 728f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman} 729f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 7304188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskeyunsigned PPCRegisterInfo::getRARegister() const { 7314188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey return PPC::LR; 7324188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey} 7334188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey 734a99791886d5d4af2b900cd8cc1c9ed1677b6f0f4Jim Laskeyunsigned PPCRegisterInfo::getFrameRegister(MachineFunction &MF) const { 7354188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey return hasFP(MF) ? PPC::R31 : PPC::R1; 7364188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey} 7374188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey 7384188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskeyvoid PPCRegisterInfo::getInitialFrameState(std::vector<MachineMove *> &Moves) 7394188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey const { 7404c2c9031acd1314440cdd0952182fa39b4efe90dJim Laskey // Initial state of the frame pointer is R1. 7414188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey MachineLocation Dst(MachineLocation::VirtualFP); 7424188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey MachineLocation Src(PPC::R1, 0); 7434188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey Moves.push_back(new MachineMove(0, Dst, Src)); 744f1d78e83356a412e525c30ac90dabf090a8cfc99Jim Laskey} 745f1d78e83356a412e525c30ac90dabf090a8cfc99Jim Laskey 7464c7b43b43fdf943c7298718e15ab5d6dfe345be7Chris Lattner#include "PPCGenRegisterInfo.inc" 747f2ccb77ee9d8ab35866dae111fa36929689c7511Misha Brukman 748