ARMBaseRegisterInfo.cpp revision 50f8516d2dd87e6c02a46fa349b75101f9db8619
12cfd52c507bd5790457a171eb9bcb39019cc6860Chris Lattner//===- ARMBaseRegisterInfo.cpp - ARM Register Information -------*- C++ -*-===// 2c140c4803dc3e10e08138670829bc0494986abe9David Goodwin// 3c140c4803dc3e10e08138670829bc0494986abe9David Goodwin// The LLVM Compiler Infrastructure 4c140c4803dc3e10e08138670829bc0494986abe9David Goodwin// 5c140c4803dc3e10e08138670829bc0494986abe9David Goodwin// This file is distributed under the University of Illinois Open Source 6c140c4803dc3e10e08138670829bc0494986abe9David Goodwin// License. See LICENSE.TXT for details. 7c140c4803dc3e10e08138670829bc0494986abe9David Goodwin// 8c140c4803dc3e10e08138670829bc0494986abe9David Goodwin//===----------------------------------------------------------------------===// 9c140c4803dc3e10e08138670829bc0494986abe9David Goodwin// 10c140c4803dc3e10e08138670829bc0494986abe9David Goodwin// This file contains the base ARM implementation of TargetRegisterInfo class. 11c140c4803dc3e10e08138670829bc0494986abe9David Goodwin// 12c140c4803dc3e10e08138670829bc0494986abe9David Goodwin//===----------------------------------------------------------------------===// 13c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 14c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "ARM.h" 15c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "ARMAddressingModes.h" 16db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin#include "ARMBaseInstrInfo.h" 17c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "ARMBaseRegisterInfo.h" 18c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "ARMInstrInfo.h" 19c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "ARMMachineFunctionInfo.h" 20c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "ARMSubtarget.h" 21c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "llvm/Constants.h" 22c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "llvm/DerivedTypes.h" 239adc0abad3c3ed40a268ccbcee0c74cb9e1359feOwen Anderson#include "llvm/Function.h" 249adc0abad3c3ed40a268ccbcee0c74cb9e1359feOwen Anderson#include "llvm/LLVMContext.h" 25c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "llvm/CodeGen/MachineConstantPool.h" 26c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "llvm/CodeGen/MachineFrameInfo.h" 27c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "llvm/CodeGen/MachineFunction.h" 28c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "llvm/CodeGen/MachineInstrBuilder.h" 29c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "llvm/CodeGen/MachineLocation.h" 30c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "llvm/CodeGen/MachineRegisterInfo.h" 31c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "llvm/CodeGen/RegisterScavenging.h" 323dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach#include "llvm/Support/Debug.h" 33ab7c09b6b6f4516a631fd6788918c237c83939afTorok Edwin#include "llvm/Support/ErrorHandling.h" 34dac237e18209b697a8ba122d0ddd9cad4dfba1f8Torok Edwin#include "llvm/Support/raw_ostream.h" 35c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "llvm/Target/TargetFrameInfo.h" 36c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "llvm/Target/TargetMachine.h" 37c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "llvm/Target/TargetOptions.h" 38c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "llvm/ADT/BitVector.h" 39c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "llvm/ADT/SmallVector.h" 4018ed9c9a2bd7f1f56129495b499264c58b5cc4f4Jim Grosbach#include "llvm/Support/CommandLine.h" 41c140c4803dc3e10e08138670829bc0494986abe9David Goodwinusing namespace llvm; 42c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 4318ed9c9a2bd7f1f56129495b499264c58b5cc4f4Jim Grosbachstatic cl::opt<bool> 44a6a99b4e160eea0060b25fbdeadc3437cd67d617Jim GrosbachReuseFrameIndexVals("arm-reuse-frame-index-vals", cl::Hidden, cl::init(true), 4518ed9c9a2bd7f1f56129495b499264c58b5cc4f4Jim Grosbach cl::desc("Reuse repeated frame index values")); 4618ed9c9a2bd7f1f56129495b499264c58b5cc4f4Jim Grosbach 47c140c4803dc3e10e08138670829bc0494986abe9David Goodwinunsigned ARMBaseRegisterInfo::getRegisterNumbering(unsigned RegEnum, 488295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng bool *isSPVFP) { 498295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng if (isSPVFP) 508295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng *isSPVFP = false; 51c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 52c140c4803dc3e10e08138670829bc0494986abe9David Goodwin using namespace ARM; 53c140c4803dc3e10e08138670829bc0494986abe9David Goodwin switch (RegEnum) { 54c140c4803dc3e10e08138670829bc0494986abe9David Goodwin default: 55c23197a26f34f559ea9797de51e187087c039c42Torok Edwin llvm_unreachable("Unknown ARM register!"); 568295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case R0: case D0: case Q0: return 0; 578295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case R1: case D1: case Q1: return 1; 588295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case R2: case D2: case Q2: return 2; 598295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case R3: case D3: case Q3: return 3; 608295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case R4: case D4: case Q4: return 4; 618295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case R5: case D5: case Q5: return 5; 628295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case R6: case D6: case Q6: return 6; 638295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case R7: case D7: case Q7: return 7; 648295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case R8: case D8: case Q8: return 8; 658295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case R9: case D9: case Q9: return 9; 668295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case R10: case D10: case Q10: return 10; 678295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case R11: case D11: case Q11: return 11; 688295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case R12: case D12: case Q12: return 12; 698295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case SP: case D13: case Q13: return 13; 708295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case LR: case D14: case Q14: return 14; 718295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case PC: case D15: case Q15: return 15; 728295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng 738295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case D16: return 16; 748295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case D17: return 17; 758295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case D18: return 18; 768295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case D19: return 19; 778295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case D20: return 20; 788295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case D21: return 21; 798295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case D22: return 22; 808295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case D23: return 23; 818295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case D24: return 24; 828295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case D25: return 25; 838295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case D26: return 27; 848295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case D27: return 27; 858295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case D28: return 28; 868295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case D29: return 29; 878295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case D30: return 30; 888295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case D31: return 31; 89c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 90c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S0: case S1: case S2: case S3: 91c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S4: case S5: case S6: case S7: 92c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S8: case S9: case S10: case S11: 93c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S12: case S13: case S14: case S15: 94c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S16: case S17: case S18: case S19: 95c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S20: case S21: case S22: case S23: 96c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S24: case S25: case S26: case S27: 978295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case S28: case S29: case S30: case S31: { 988295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng if (isSPVFP) 998295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng *isSPVFP = true; 100c140c4803dc3e10e08138670829bc0494986abe9David Goodwin switch (RegEnum) { 101c140c4803dc3e10e08138670829bc0494986abe9David Goodwin default: return 0; // Avoid compile time warning. 102c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S0: return 0; 103c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S1: return 1; 104c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S2: return 2; 105c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S3: return 3; 106c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S4: return 4; 107c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S5: return 5; 108c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S6: return 6; 109c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S7: return 7; 110c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S8: return 8; 111c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S9: return 9; 112c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S10: return 10; 113c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S11: return 11; 114c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S12: return 12; 115c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S13: return 13; 116c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S14: return 14; 117c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S15: return 15; 118c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S16: return 16; 119c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S17: return 17; 120c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S18: return 18; 121c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S19: return 19; 122c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S20: return 20; 123c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S21: return 21; 124c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S22: return 22; 125c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S23: return 23; 126c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S24: return 24; 127c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S25: return 25; 128c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S26: return 26; 129c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S27: return 27; 130c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S28: return 28; 131c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S29: return 29; 132c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S30: return 30; 133c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case S31: return 31; 134c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 135c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 136c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 137c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 138c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 139db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid GoodwinARMBaseRegisterInfo::ARMBaseRegisterInfo(const ARMBaseInstrInfo &tii, 140c140c4803dc3e10e08138670829bc0494986abe9David Goodwin const ARMSubtarget &sti) 141c140c4803dc3e10e08138670829bc0494986abe9David Goodwin : ARMGenRegisterInfo(ARM::ADJCALLSTACKDOWN, ARM::ADJCALLSTACKUP), 142c140c4803dc3e10e08138670829bc0494986abe9David Goodwin TII(tii), STI(sti), 143c140c4803dc3e10e08138670829bc0494986abe9David Goodwin FramePtr((STI.isTargetDarwin() || STI.isThumb()) ? ARM::R7 : ARM::R11) { 144c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 145c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 146c140c4803dc3e10e08138670829bc0494986abe9David Goodwinconst unsigned* 147c140c4803dc3e10e08138670829bc0494986abe9David GoodwinARMBaseRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const { 148c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const unsigned CalleeSavedRegs[] = { 149c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::LR, ARM::R11, ARM::R10, ARM::R9, ARM::R8, 150c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R7, ARM::R6, ARM::R5, ARM::R4, 151c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 152c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::D15, ARM::D14, ARM::D13, ARM::D12, 153c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::D11, ARM::D10, ARM::D9, ARM::D8, 154c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 0 155c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 156c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 157c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const unsigned DarwinCalleeSavedRegs[] = { 158c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Darwin ABI deviates from ARM standard ABI. R9 is not a callee-saved 159c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // register. 160c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::LR, ARM::R7, ARM::R6, ARM::R5, ARM::R4, 161c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R11, ARM::R10, ARM::R8, 162c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 163c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::D15, ARM::D14, ARM::D13, ARM::D12, 164c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::D11, ARM::D10, ARM::D9, ARM::D8, 165c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 0 166c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 167c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return STI.isTargetDarwin() ? DarwinCalleeSavedRegs : CalleeSavedRegs; 168c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 169c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 170c140c4803dc3e10e08138670829bc0494986abe9David Goodwinconst TargetRegisterClass* const * 171c140c4803dc3e10e08138670829bc0494986abe9David GoodwinARMBaseRegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const { 172c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const TargetRegisterClass * const CalleeSavedRegClasses[] = { 17382b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::GPRRegClass, &ARM::GPRRegClass, &ARM::GPRRegClass, 17482b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::GPRRegClass, &ARM::GPRRegClass, &ARM::GPRRegClass, 17582b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::GPRRegClass, &ARM::GPRRegClass, &ARM::GPRRegClass, 176c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 17782b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::DPRRegClass, &ARM::DPRRegClass, &ARM::DPRRegClass, &ARM::DPRRegClass, 17882b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::DPRRegClass, &ARM::DPRRegClass, &ARM::DPRRegClass, &ARM::DPRRegClass, 179c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 0 180c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 181c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 182c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const TargetRegisterClass * const ThumbCalleeSavedRegClasses[] = { 18382b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::GPRRegClass, &ARM::GPRRegClass, &ARM::GPRRegClass, 18482b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::GPRRegClass, &ARM::GPRRegClass, &ARM::tGPRRegClass, 18582b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::tGPRRegClass,&ARM::tGPRRegClass,&ARM::tGPRRegClass, 186c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 18782b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::DPRRegClass, &ARM::DPRRegClass, &ARM::DPRRegClass, &ARM::DPRRegClass, 18882b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::DPRRegClass, &ARM::DPRRegClass, &ARM::DPRRegClass, &ARM::DPRRegClass, 189c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 0 190c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 191c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 192c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const TargetRegisterClass * const DarwinCalleeSavedRegClasses[] = { 19382b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::GPRRegClass, &ARM::GPRRegClass, &ARM::GPRRegClass, 19482b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::GPRRegClass, &ARM::GPRRegClass, &ARM::GPRRegClass, 19582b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::GPRRegClass, &ARM::GPRRegClass, 196c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 19782b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::DPRRegClass, &ARM::DPRRegClass, &ARM::DPRRegClass, &ARM::DPRRegClass, 19882b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::DPRRegClass, &ARM::DPRRegClass, &ARM::DPRRegClass, &ARM::DPRRegClass, 199c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 0 200c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 201c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 202c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const TargetRegisterClass * const DarwinThumbCalleeSavedRegClasses[] ={ 20382b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::GPRRegClass, &ARM::tGPRRegClass, &ARM::tGPRRegClass, 20482b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::tGPRRegClass, &ARM::tGPRRegClass, &ARM::GPRRegClass, 20582b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::GPRRegClass, &ARM::GPRRegClass, 206c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 20782b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::DPRRegClass, &ARM::DPRRegClass, &ARM::DPRRegClass, &ARM::DPRRegClass, 20882b3c2e40417098f9af0c33150c4b1c66ae1747cJim Grosbach &ARM::DPRRegClass, &ARM::DPRRegClass, &ARM::DPRRegClass, &ARM::DPRRegClass, 209c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 0 210c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 211c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 212f1daf7d8abebd6e0104a6b41a774ccbb19a51c60David Goodwin if (STI.isThumb1Only()) { 213c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return STI.isTargetDarwin() 214c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ? DarwinThumbCalleeSavedRegClasses : ThumbCalleeSavedRegClasses; 215c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 216c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return STI.isTargetDarwin() 217c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ? DarwinCalleeSavedRegClasses : CalleeSavedRegClasses; 218c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 219c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 220c140c4803dc3e10e08138670829bc0494986abe9David GoodwinBitVector ARMBaseRegisterInfo::getReservedRegs(const MachineFunction &MF) const { 221c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // FIXME: avoid re-calculating this everytime. 222c140c4803dc3e10e08138670829bc0494986abe9David Goodwin BitVector Reserved(getNumRegs()); 223c140c4803dc3e10e08138670829bc0494986abe9David Goodwin Reserved.set(ARM::SP); 224c140c4803dc3e10e08138670829bc0494986abe9David Goodwin Reserved.set(ARM::PC); 225c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (STI.isTargetDarwin() || hasFP(MF)) 226c140c4803dc3e10e08138670829bc0494986abe9David Goodwin Reserved.set(FramePtr); 227c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Some targets reserve R9. 228c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (STI.isR9Reserved()) 229c140c4803dc3e10e08138670829bc0494986abe9David Goodwin Reserved.set(ARM::R9); 230c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return Reserved; 231c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 232c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 2332cfd52c507bd5790457a171eb9bcb39019cc6860Chris Lattnerbool ARMBaseRegisterInfo::isReservedReg(const MachineFunction &MF, 2342cfd52c507bd5790457a171eb9bcb39019cc6860Chris Lattner unsigned Reg) const { 235c140c4803dc3e10e08138670829bc0494986abe9David Goodwin switch (Reg) { 236c140c4803dc3e10e08138670829bc0494986abe9David Goodwin default: break; 237c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::SP: 238c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::PC: 239c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return true; 240c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R7: 241c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R11: 242c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (FramePtr == Reg && (STI.isTargetDarwin() || hasFP(MF))) 243c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return true; 244c140c4803dc3e10e08138670829bc0494986abe9David Goodwin break; 245c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R9: 246c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return STI.isR9Reserved(); 247c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 248c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 249c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return false; 250c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 251c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 2522cfd52c507bd5790457a171eb9bcb39019cc6860Chris Lattnerconst TargetRegisterClass * 2534f54c1293af174a8002db20faf7b4f82ba4e8514Evan ChengARMBaseRegisterInfo::getMatchingSuperRegClass(const TargetRegisterClass *A, 2544f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng const TargetRegisterClass *B, 2554f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng unsigned SubIdx) const { 2564f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng switch (SubIdx) { 2574f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng default: return 0; 2584f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng case 1: 2594f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng case 2: 2604f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng case 3: 2614f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng case 4: 2624f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng // S sub-registers. 2634f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng if (A->getSize() == 8) { 264ba908640b3e0c1218748776e244d4b7234451155Evan Cheng if (B == &ARM::SPR_8RegClass) 265ba908640b3e0c1218748776e244d4b7234451155Evan Cheng return &ARM::DPR_8RegClass; 266ba908640b3e0c1218748776e244d4b7234451155Evan Cheng assert(B == &ARM::SPRRegClass && "Expecting SPR register class!"); 2674f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng if (A == &ARM::DPR_8RegClass) 2684f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng return A; 2694f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng return &ARM::DPR_VFP2RegClass; 2704f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng } 2714f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng 2724f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng assert(A->getSize() == 16 && "Expecting a Q register class!"); 273ba908640b3e0c1218748776e244d4b7234451155Evan Cheng if (B == &ARM::SPR_8RegClass) 274ba908640b3e0c1218748776e244d4b7234451155Evan Cheng return &ARM::QPR_8RegClass; 2754f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng return &ARM::QPR_VFP2RegClass; 2764f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng case 5: 2774f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng case 6: 2784f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng // D sub-registers. 279ba908640b3e0c1218748776e244d4b7234451155Evan Cheng if (B == &ARM::DPR_VFP2RegClass) 280ba908640b3e0c1218748776e244d4b7234451155Evan Cheng return &ARM::QPR_VFP2RegClass; 281ba908640b3e0c1218748776e244d4b7234451155Evan Cheng if (B == &ARM::DPR_8RegClass) 282ba908640b3e0c1218748776e244d4b7234451155Evan Cheng return &ARM::QPR_8RegClass; 2834f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng return A; 2844f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng } 2854f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng return 0; 2864f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng} 2874f54c1293af174a8002db20faf7b4f82ba4e8514Evan Cheng 2884f54c1293af174a8002db20faf7b4f82ba4e8514Evan Chengconst TargetRegisterClass * 2892cfd52c507bd5790457a171eb9bcb39019cc6860Chris LattnerARMBaseRegisterInfo::getPointerRegClass(unsigned Kind) const { 290e11a8f565c6a019ddc54667227be9c4d8f117473Jim Grosbach return ARM::GPRRegisterClass; 291c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 292c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 293c140c4803dc3e10e08138670829bc0494986abe9David Goodwin/// getAllocationOrder - Returns the register allocation order for a specified 294c140c4803dc3e10e08138670829bc0494986abe9David Goodwin/// register class in the form of a pair of TargetRegisterClass iterators. 295c140c4803dc3e10e08138670829bc0494986abe9David Goodwinstd::pair<TargetRegisterClass::iterator,TargetRegisterClass::iterator> 296c140c4803dc3e10e08138670829bc0494986abe9David GoodwinARMBaseRegisterInfo::getAllocationOrder(const TargetRegisterClass *RC, 297c140c4803dc3e10e08138670829bc0494986abe9David Goodwin unsigned HintType, unsigned HintReg, 298c140c4803dc3e10e08138670829bc0494986abe9David Goodwin const MachineFunction &MF) const { 299c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Alternative register allocation orders when favoring even / odd registers 300c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // of register pairs. 301c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 302c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // No FP, R9 is available. 303c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const unsigned GPREven1[] = { 304c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R0, ARM::R2, ARM::R4, ARM::R6, ARM::R8, ARM::R10, 305c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R1, ARM::R3, ARM::R12,ARM::LR, ARM::R5, ARM::R7, 306c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R9, ARM::R11 307c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 308c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const unsigned GPROdd1[] = { 309c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R1, ARM::R3, ARM::R5, ARM::R7, ARM::R9, ARM::R11, 310c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R0, ARM::R2, ARM::R12,ARM::LR, ARM::R4, ARM::R6, 311c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R8, ARM::R10 312c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 313c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 314c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // FP is R7, R9 is available. 315c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const unsigned GPREven2[] = { 316c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R0, ARM::R2, ARM::R4, ARM::R8, ARM::R10, 317c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R1, ARM::R3, ARM::R12,ARM::LR, ARM::R5, ARM::R6, 318c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R9, ARM::R11 319c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 320c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const unsigned GPROdd2[] = { 321c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R1, ARM::R3, ARM::R5, ARM::R9, ARM::R11, 322c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R0, ARM::R2, ARM::R12,ARM::LR, ARM::R4, ARM::R6, 323c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R8, ARM::R10 324c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 325c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 326c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // FP is R11, R9 is available. 327c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const unsigned GPREven3[] = { 328c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R0, ARM::R2, ARM::R4, ARM::R6, ARM::R8, 329c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R1, ARM::R3, ARM::R10,ARM::R12,ARM::LR, ARM::R5, ARM::R7, 330c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R9 331c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 332c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const unsigned GPROdd3[] = { 333c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R1, ARM::R3, ARM::R5, ARM::R6, ARM::R9, 334c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R0, ARM::R2, ARM::R10,ARM::R12,ARM::LR, ARM::R4, ARM::R7, 335c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R8 336c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 337c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 338c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // No FP, R9 is not available. 339c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const unsigned GPREven4[] = { 340c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R0, ARM::R2, ARM::R4, ARM::R6, ARM::R10, 341c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R1, ARM::R3, ARM::R12,ARM::LR, ARM::R5, ARM::R7, ARM::R8, 342c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R11 343c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 344c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const unsigned GPROdd4[] = { 345c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R1, ARM::R3, ARM::R5, ARM::R7, ARM::R11, 346c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R0, ARM::R2, ARM::R12,ARM::LR, ARM::R4, ARM::R6, ARM::R8, 347c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R10 348c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 349c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 350c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // FP is R7, R9 is not available. 351c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const unsigned GPREven5[] = { 352c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R0, ARM::R2, ARM::R4, ARM::R10, 353c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R1, ARM::R3, ARM::R12,ARM::LR, ARM::R5, ARM::R6, ARM::R8, 354c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R11 355c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 356c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const unsigned GPROdd5[] = { 357c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R1, ARM::R3, ARM::R5, ARM::R11, 358c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R0, ARM::R2, ARM::R12,ARM::LR, ARM::R4, ARM::R6, ARM::R8, 359c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R10 360c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 361c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 362c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // FP is R11, R9 is not available. 363c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const unsigned GPREven6[] = { 364c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R0, ARM::R2, ARM::R4, ARM::R6, 365c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R1, ARM::R3, ARM::R10,ARM::R12,ARM::LR, ARM::R5, ARM::R7, ARM::R8 366c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 367c140c4803dc3e10e08138670829bc0494986abe9David Goodwin static const unsigned GPROdd6[] = { 368c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R1, ARM::R3, ARM::R5, ARM::R7, 369c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARM::R0, ARM::R2, ARM::R10,ARM::R12,ARM::LR, ARM::R4, ARM::R6, ARM::R8 370c140c4803dc3e10e08138670829bc0494986abe9David Goodwin }; 371c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 372c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 373c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (HintType == ARMRI::RegPairEven) { 374c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (isPhysicalRegister(HintReg) && getRegisterPairEven(HintReg, MF) == 0) 375c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // It's no longer possible to fulfill this hint. Return the default 376c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // allocation order. 377c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return std::make_pair(RC->allocation_order_begin(MF), 378c140c4803dc3e10e08138670829bc0494986abe9David Goodwin RC->allocation_order_end(MF)); 379c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 380c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (!STI.isTargetDarwin() && !hasFP(MF)) { 381c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (!STI.isR9Reserved()) 382c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return std::make_pair(GPREven1, 383c140c4803dc3e10e08138670829bc0494986abe9David Goodwin GPREven1 + (sizeof(GPREven1)/sizeof(unsigned))); 384c140c4803dc3e10e08138670829bc0494986abe9David Goodwin else 385c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return std::make_pair(GPREven4, 386c140c4803dc3e10e08138670829bc0494986abe9David Goodwin GPREven4 + (sizeof(GPREven4)/sizeof(unsigned))); 387c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } else if (FramePtr == ARM::R7) { 388c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (!STI.isR9Reserved()) 389c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return std::make_pair(GPREven2, 390c140c4803dc3e10e08138670829bc0494986abe9David Goodwin GPREven2 + (sizeof(GPREven2)/sizeof(unsigned))); 391c140c4803dc3e10e08138670829bc0494986abe9David Goodwin else 392c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return std::make_pair(GPREven5, 393c140c4803dc3e10e08138670829bc0494986abe9David Goodwin GPREven5 + (sizeof(GPREven5)/sizeof(unsigned))); 394c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } else { // FramePtr == ARM::R11 395c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (!STI.isR9Reserved()) 396c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return std::make_pair(GPREven3, 397c140c4803dc3e10e08138670829bc0494986abe9David Goodwin GPREven3 + (sizeof(GPREven3)/sizeof(unsigned))); 398c140c4803dc3e10e08138670829bc0494986abe9David Goodwin else 399c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return std::make_pair(GPREven6, 400c140c4803dc3e10e08138670829bc0494986abe9David Goodwin GPREven6 + (sizeof(GPREven6)/sizeof(unsigned))); 401c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 402c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } else if (HintType == ARMRI::RegPairOdd) { 403c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (isPhysicalRegister(HintReg) && getRegisterPairOdd(HintReg, MF) == 0) 404c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // It's no longer possible to fulfill this hint. Return the default 405c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // allocation order. 406c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return std::make_pair(RC->allocation_order_begin(MF), 407c140c4803dc3e10e08138670829bc0494986abe9David Goodwin RC->allocation_order_end(MF)); 408c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 409c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (!STI.isTargetDarwin() && !hasFP(MF)) { 410c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (!STI.isR9Reserved()) 411c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return std::make_pair(GPROdd1, 412c140c4803dc3e10e08138670829bc0494986abe9David Goodwin GPROdd1 + (sizeof(GPROdd1)/sizeof(unsigned))); 413c140c4803dc3e10e08138670829bc0494986abe9David Goodwin else 414c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return std::make_pair(GPROdd4, 415c140c4803dc3e10e08138670829bc0494986abe9David Goodwin GPROdd4 + (sizeof(GPROdd4)/sizeof(unsigned))); 416c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } else if (FramePtr == ARM::R7) { 417c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (!STI.isR9Reserved()) 418c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return std::make_pair(GPROdd2, 419c140c4803dc3e10e08138670829bc0494986abe9David Goodwin GPROdd2 + (sizeof(GPROdd2)/sizeof(unsigned))); 420c140c4803dc3e10e08138670829bc0494986abe9David Goodwin else 421c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return std::make_pair(GPROdd5, 422c140c4803dc3e10e08138670829bc0494986abe9David Goodwin GPROdd5 + (sizeof(GPROdd5)/sizeof(unsigned))); 423c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } else { // FramePtr == ARM::R11 424c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (!STI.isR9Reserved()) 425c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return std::make_pair(GPROdd3, 426c140c4803dc3e10e08138670829bc0494986abe9David Goodwin GPROdd3 + (sizeof(GPROdd3)/sizeof(unsigned))); 427c140c4803dc3e10e08138670829bc0494986abe9David Goodwin else 428c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return std::make_pair(GPROdd6, 429c140c4803dc3e10e08138670829bc0494986abe9David Goodwin GPROdd6 + (sizeof(GPROdd6)/sizeof(unsigned))); 430c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 431c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 432c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return std::make_pair(RC->allocation_order_begin(MF), 433c140c4803dc3e10e08138670829bc0494986abe9David Goodwin RC->allocation_order_end(MF)); 434c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 435c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 436c140c4803dc3e10e08138670829bc0494986abe9David Goodwin/// ResolveRegAllocHint - Resolves the specified register allocation hint 437c140c4803dc3e10e08138670829bc0494986abe9David Goodwin/// to a physical register. Returns the physical register if it is successful. 438c140c4803dc3e10e08138670829bc0494986abe9David Goodwinunsigned 439c140c4803dc3e10e08138670829bc0494986abe9David GoodwinARMBaseRegisterInfo::ResolveRegAllocHint(unsigned Type, unsigned Reg, 440c140c4803dc3e10e08138670829bc0494986abe9David Goodwin const MachineFunction &MF) const { 441c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (Reg == 0 || !isPhysicalRegister(Reg)) 442c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return 0; 443c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (Type == 0) 444c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return Reg; 445c140c4803dc3e10e08138670829bc0494986abe9David Goodwin else if (Type == (unsigned)ARMRI::RegPairOdd) 446c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Odd register. 447c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return getRegisterPairOdd(Reg, MF); 448c140c4803dc3e10e08138670829bc0494986abe9David Goodwin else if (Type == (unsigned)ARMRI::RegPairEven) 449c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Even register. 450c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return getRegisterPairEven(Reg, MF); 451c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return 0; 452c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 453c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 454c140c4803dc3e10e08138670829bc0494986abe9David Goodwinvoid 455c140c4803dc3e10e08138670829bc0494986abe9David GoodwinARMBaseRegisterInfo::UpdateRegAllocHint(unsigned Reg, unsigned NewReg, 456c140c4803dc3e10e08138670829bc0494986abe9David Goodwin MachineFunction &MF) const { 457c140c4803dc3e10e08138670829bc0494986abe9David Goodwin MachineRegisterInfo *MRI = &MF.getRegInfo(); 458c140c4803dc3e10e08138670829bc0494986abe9David Goodwin std::pair<unsigned, unsigned> Hint = MRI->getRegAllocationHint(Reg); 459c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if ((Hint.first == (unsigned)ARMRI::RegPairOdd || 460c140c4803dc3e10e08138670829bc0494986abe9David Goodwin Hint.first == (unsigned)ARMRI::RegPairEven) && 461c140c4803dc3e10e08138670829bc0494986abe9David Goodwin Hint.second && TargetRegisterInfo::isVirtualRegister(Hint.second)) { 462c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // If 'Reg' is one of the even / odd register pair and it's now changed 463c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // (e.g. coalesced) into a different register. The other register of the 464c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // pair allocation hint must be updated to reflect the relationship 465c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // change. 466c140c4803dc3e10e08138670829bc0494986abe9David Goodwin unsigned OtherReg = Hint.second; 467c140c4803dc3e10e08138670829bc0494986abe9David Goodwin Hint = MRI->getRegAllocationHint(OtherReg); 468c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (Hint.second == Reg) 469c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Make sure the pair has not already divorced. 470c140c4803dc3e10e08138670829bc0494986abe9David Goodwin MRI->setRegAllocationHint(OtherReg, Hint.first, NewReg); 471c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 472c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 473c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 4743dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbachstatic unsigned calculateMaxStackAlignment(const MachineFrameInfo *FFI) { 475ad353c74adda55556f7a3969721c3e49ac16d570Jim Grosbach unsigned MaxAlign = 0; 4763dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach 4773dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach for (int i = FFI->getObjectIndexBegin(), 4783dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach e = FFI->getObjectIndexEnd(); i != e; ++i) { 4793dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach if (FFI->isDeadObjectIndex(i)) 4803dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach continue; 4813dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach 4823dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach unsigned Align = FFI->getObjectAlignment(i); 4833dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach MaxAlign = std::max(MaxAlign, Align); 4843dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach } 4853dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach 4863dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach return MaxAlign; 4873dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach} 4883dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach 489c140c4803dc3e10e08138670829bc0494986abe9David Goodwin/// hasFP - Return true if the specified function should have a dedicated frame 490c140c4803dc3e10e08138670829bc0494986abe9David Goodwin/// pointer register. This is true if the function has variable sized allocas 491c140c4803dc3e10e08138670829bc0494986abe9David Goodwin/// or if frame pointer elimination is disabled. 492c140c4803dc3e10e08138670829bc0494986abe9David Goodwin/// 493c140c4803dc3e10e08138670829bc0494986abe9David Goodwinbool ARMBaseRegisterInfo::hasFP(const MachineFunction &MF) const { 494c140c4803dc3e10e08138670829bc0494986abe9David Goodwin const MachineFrameInfo *MFI = MF.getFrameInfo(); 49521ce2e3c74d3b64a9dafde190d18dbf3aa003112Jim Grosbach return (NoFramePointerElim || 4963dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach needsStackRealignment(MF) || 497c140c4803dc3e10e08138670829bc0494986abe9David Goodwin MFI->hasVarSizedObjects() || 498c140c4803dc3e10e08138670829bc0494986abe9David Goodwin MFI->isFrameAddressTaken()); 499c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 500c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 5013dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbachbool ARMBaseRegisterInfo:: 5023dab2778571b5bb00b35a0adcb7011dc85158bebJim GrosbachneedsStackRealignment(const MachineFunction &MF) const { 5033dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach const MachineFrameInfo *MFI = MF.getFrameInfo(); 5043dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach const ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); 505ad353c74adda55556f7a3969721c3e49ac16d570Jim Grosbach unsigned StackAlign = MF.getTarget().getFrameInfo()->getStackAlignment(); 5063dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach return (RealignStack && 5073dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach !AFI->isThumb1OnlyFunction() && 508ad353c74adda55556f7a3969721c3e49ac16d570Jim Grosbach (MFI->getMaxAlignment() > StackAlign) && 5093dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach !MFI->hasVarSizedObjects()); 5103dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach} 5113dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach 512010b1b9e7b11bced0b277a4d808226ba2af3044aEvan Chengbool ARMBaseRegisterInfo::cannotEliminateFrame(const MachineFunction &MF) const { 51398a0104014e9bb6ed89c2572f615351fd526674aEvan Cheng const MachineFrameInfo *MFI = MF.getFrameInfo(); 51498a0104014e9bb6ed89c2572f615351fd526674aEvan Cheng if (NoFramePointerElim && MFI->hasCalls()) 51598a0104014e9bb6ed89c2572f615351fd526674aEvan Cheng return true; 51631bc849123011b8eae6bb3c79876d9a3c26a6a1dJim Grosbach return MFI->hasVarSizedObjects() || MFI->isFrameAddressTaken() 51731bc849123011b8eae6bb3c79876d9a3c26a6a1dJim Grosbach || needsStackRealignment(MF); 51898a0104014e9bb6ed89c2572f615351fd526674aEvan Cheng} 51998a0104014e9bb6ed89c2572f615351fd526674aEvan Cheng 520542383d93b146e11a1d70c01f8afea8ea9f08effEvan Cheng/// estimateStackSize - Estimate and return the size of the frame. 521c140c4803dc3e10e08138670829bc0494986abe9David Goodwinstatic unsigned estimateStackSize(MachineFunction &MF, MachineFrameInfo *MFI) { 522c140c4803dc3e10e08138670829bc0494986abe9David Goodwin const MachineFrameInfo *FFI = MF.getFrameInfo(); 523c140c4803dc3e10e08138670829bc0494986abe9David Goodwin int Offset = 0; 524c140c4803dc3e10e08138670829bc0494986abe9David Goodwin for (int i = FFI->getObjectIndexBegin(); i != 0; ++i) { 525c140c4803dc3e10e08138670829bc0494986abe9David Goodwin int FixedOff = -FFI->getObjectOffset(i); 526c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (FixedOff > Offset) Offset = FixedOff; 527c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 528c140c4803dc3e10e08138670829bc0494986abe9David Goodwin for (unsigned i = 0, e = FFI->getObjectIndexEnd(); i != e; ++i) { 529c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (FFI->isDeadObjectIndex(i)) 530c140c4803dc3e10e08138670829bc0494986abe9David Goodwin continue; 531c140c4803dc3e10e08138670829bc0494986abe9David Goodwin Offset += FFI->getObjectSize(i); 532c140c4803dc3e10e08138670829bc0494986abe9David Goodwin unsigned Align = FFI->getObjectAlignment(i); 533c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Adjust to alignment boundary 534c140c4803dc3e10e08138670829bc0494986abe9David Goodwin Offset = (Offset+Align-1)/Align*Align; 535c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 536c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return (unsigned)Offset; 537c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 538c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 539542383d93b146e11a1d70c01f8afea8ea9f08effEvan Cheng/// estimateRSStackSizeLimit - Look at each instruction that references stack 540542383d93b146e11a1d70c01f8afea8ea9f08effEvan Cheng/// frames and return the stack size limit beyond which some of these 541542383d93b146e11a1d70c01f8afea8ea9f08effEvan Cheng/// instructions will require scratch register during their expansion later. 542ee42fd309ee6a8febfafb97c2f3b6f2069758c5eEvan Chengunsigned 543ee42fd309ee6a8febfafb97c2f3b6f2069758c5eEvan ChengARMBaseRegisterInfo::estimateRSStackSizeLimit(MachineFunction &MF) const { 544542383d93b146e11a1d70c01f8afea8ea9f08effEvan Cheng unsigned Limit = (1 << 12) - 1; 545b180d992d81f97862af6089dfe899d0363cac6f5Chris Lattner for (MachineFunction::iterator BB = MF.begin(),E = MF.end(); BB != E; ++BB) { 546b180d992d81f97862af6089dfe899d0363cac6f5Chris Lattner for (MachineBasicBlock::iterator I = BB->begin(), E = BB->end(); 547b180d992d81f97862af6089dfe899d0363cac6f5Chris Lattner I != E; ++I) { 548b180d992d81f97862af6089dfe899d0363cac6f5Chris Lattner for (unsigned i = 0, e = I->getNumOperands(); i != e; ++i) { 549b180d992d81f97862af6089dfe899d0363cac6f5Chris Lattner if (!I->getOperand(i).isFI()) continue; 550764ab52dd80310a205c9888bf166d09dab858f90Jim Grosbach 551b180d992d81f97862af6089dfe899d0363cac6f5Chris Lattner const TargetInstrDesc &Desc = TII.get(I->getOpcode()); 552b180d992d81f97862af6089dfe899d0363cac6f5Chris Lattner unsigned AddrMode = (Desc.TSFlags & ARMII::AddrModeMask); 553b180d992d81f97862af6089dfe899d0363cac6f5Chris Lattner if (AddrMode == ARMII::AddrMode3 || 554b180d992d81f97862af6089dfe899d0363cac6f5Chris Lattner AddrMode == ARMII::AddrModeT2_i8) 555b180d992d81f97862af6089dfe899d0363cac6f5Chris Lattner return (1 << 8) - 1; 556764ab52dd80310a205c9888bf166d09dab858f90Jim Grosbach 557b180d992d81f97862af6089dfe899d0363cac6f5Chris Lattner if (AddrMode == ARMII::AddrMode5 || 558b180d992d81f97862af6089dfe899d0363cac6f5Chris Lattner AddrMode == ARMII::AddrModeT2_i8s4) 559b180d992d81f97862af6089dfe899d0363cac6f5Chris Lattner Limit = std::min(Limit, ((1U << 8) - 1) * 4); 560ee42fd309ee6a8febfafb97c2f3b6f2069758c5eEvan Cheng 561ee42fd309ee6a8febfafb97c2f3b6f2069758c5eEvan Cheng if (AddrMode == ARMII::AddrModeT2_i12 && hasFP(MF)) 562ee42fd309ee6a8febfafb97c2f3b6f2069758c5eEvan Cheng // When the stack offset is negative, we will end up using 563ee42fd309ee6a8febfafb97c2f3b6f2069758c5eEvan Cheng // the i8 instructions instead. 564ee42fd309ee6a8febfafb97c2f3b6f2069758c5eEvan Cheng return (1 << 8) - 1; 565b180d992d81f97862af6089dfe899d0363cac6f5Chris Lattner break; // At most one FI per instruction 566b180d992d81f97862af6089dfe899d0363cac6f5Chris Lattner } 567542383d93b146e11a1d70c01f8afea8ea9f08effEvan Cheng } 568542383d93b146e11a1d70c01f8afea8ea9f08effEvan Cheng } 569542383d93b146e11a1d70c01f8afea8ea9f08effEvan Cheng 570542383d93b146e11a1d70c01f8afea8ea9f08effEvan Cheng return Limit; 571542383d93b146e11a1d70c01f8afea8ea9f08effEvan Cheng} 572542383d93b146e11a1d70c01f8afea8ea9f08effEvan Cheng 573c140c4803dc3e10e08138670829bc0494986abe9David Goodwinvoid 574c140c4803dc3e10e08138670829bc0494986abe9David GoodwinARMBaseRegisterInfo::processFunctionBeforeCalleeSavedScan(MachineFunction &MF, 575c140c4803dc3e10e08138670829bc0494986abe9David Goodwin RegScavenger *RS) const { 576c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // This tells PEI to spill the FP as if it is any other callee-save register 577c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // to take advantage the eliminateFrameIndex machinery. This also ensures it 578c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // is spilled in the order specified by getCalleeSavedRegs() to make it easier 579c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // to combine multiple loads / stores. 580c140c4803dc3e10e08138670829bc0494986abe9David Goodwin bool CanEliminateFrame = true; 581c140c4803dc3e10e08138670829bc0494986abe9David Goodwin bool CS1Spilled = false; 582c140c4803dc3e10e08138670829bc0494986abe9David Goodwin bool LRSpilled = false; 583c140c4803dc3e10e08138670829bc0494986abe9David Goodwin unsigned NumGPRSpills = 0; 584c140c4803dc3e10e08138670829bc0494986abe9David Goodwin SmallVector<unsigned, 4> UnspilledCS1GPRs; 585c140c4803dc3e10e08138670829bc0494986abe9David Goodwin SmallVector<unsigned, 4> UnspilledCS2GPRs; 586c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); 587c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 5883dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach MachineFrameInfo *MFI = MF.getFrameInfo(); 5893dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach 5903dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach // Calculate and set max stack object alignment early, so we can decide 5913dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach // whether we will need stack realignment (and thus FP). 592803b48a155eb2b3f9fe3823ecd7cbbd0089b2809Jim Grosbach if (RealignStack) { 5933dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach unsigned MaxAlign = std::max(MFI->getMaxAlignment(), 5943dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach calculateMaxStackAlignment(MFI)); 5953dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach MFI->setMaxAlignment(MaxAlign); 5963dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach } 5973dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach 598c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Don't spill FP if the frame can be eliminated. This is determined 599c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // by scanning the callee-save registers to see if any is used. 600c140c4803dc3e10e08138670829bc0494986abe9David Goodwin const unsigned *CSRegs = getCalleeSavedRegs(); 601c140c4803dc3e10e08138670829bc0494986abe9David Goodwin const TargetRegisterClass* const *CSRegClasses = getCalleeSavedRegClasses(); 602c140c4803dc3e10e08138670829bc0494986abe9David Goodwin for (unsigned i = 0; CSRegs[i]; ++i) { 603c140c4803dc3e10e08138670829bc0494986abe9David Goodwin unsigned Reg = CSRegs[i]; 604c140c4803dc3e10e08138670829bc0494986abe9David Goodwin bool Spilled = false; 605c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (MF.getRegInfo().isPhysRegUsed(Reg)) { 606c140c4803dc3e10e08138670829bc0494986abe9David Goodwin AFI->setCSRegisterIsSpilled(Reg); 607c140c4803dc3e10e08138670829bc0494986abe9David Goodwin Spilled = true; 608c140c4803dc3e10e08138670829bc0494986abe9David Goodwin CanEliminateFrame = false; 609c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } else { 610c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Check alias registers too. 611c140c4803dc3e10e08138670829bc0494986abe9David Goodwin for (const unsigned *Aliases = getAliasSet(Reg); *Aliases; ++Aliases) { 612c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (MF.getRegInfo().isPhysRegUsed(*Aliases)) { 613c140c4803dc3e10e08138670829bc0494986abe9David Goodwin Spilled = true; 614c140c4803dc3e10e08138670829bc0494986abe9David Goodwin CanEliminateFrame = false; 615c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 616c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 617c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 618c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 619ec9eef4a15157fc0a05feff933848aa9283bd1afJim Grosbach if (CSRegClasses[i] == ARM::GPRRegisterClass || 620ec9eef4a15157fc0a05feff933848aa9283bd1afJim Grosbach CSRegClasses[i] == ARM::tGPRRegisterClass) { 621c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (Spilled) { 622c140c4803dc3e10e08138670829bc0494986abe9David Goodwin NumGPRSpills++; 623c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 624c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (!STI.isTargetDarwin()) { 625c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (Reg == ARM::LR) 626c140c4803dc3e10e08138670829bc0494986abe9David Goodwin LRSpilled = true; 627c140c4803dc3e10e08138670829bc0494986abe9David Goodwin CS1Spilled = true; 628c140c4803dc3e10e08138670829bc0494986abe9David Goodwin continue; 629c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 630c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 631c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Keep track if LR and any of R4, R5, R6, and R7 is spilled. 632c140c4803dc3e10e08138670829bc0494986abe9David Goodwin switch (Reg) { 633c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::LR: 634c140c4803dc3e10e08138670829bc0494986abe9David Goodwin LRSpilled = true; 635c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Fallthrough 636c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R4: 637c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R5: 638c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R6: 639c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R7: 640c140c4803dc3e10e08138670829bc0494986abe9David Goodwin CS1Spilled = true; 641c140c4803dc3e10e08138670829bc0494986abe9David Goodwin break; 642c140c4803dc3e10e08138670829bc0494986abe9David Goodwin default: 643c140c4803dc3e10e08138670829bc0494986abe9David Goodwin break; 644c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 645c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } else { 646c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (!STI.isTargetDarwin()) { 647c140c4803dc3e10e08138670829bc0494986abe9David Goodwin UnspilledCS1GPRs.push_back(Reg); 648c140c4803dc3e10e08138670829bc0494986abe9David Goodwin continue; 649c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 650c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 651c140c4803dc3e10e08138670829bc0494986abe9David Goodwin switch (Reg) { 652c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R4: 653c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R5: 654c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R6: 655c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R7: 656c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::LR: 657c140c4803dc3e10e08138670829bc0494986abe9David Goodwin UnspilledCS1GPRs.push_back(Reg); 658c140c4803dc3e10e08138670829bc0494986abe9David Goodwin break; 659c140c4803dc3e10e08138670829bc0494986abe9David Goodwin default: 660c140c4803dc3e10e08138670829bc0494986abe9David Goodwin UnspilledCS2GPRs.push_back(Reg); 661c140c4803dc3e10e08138670829bc0494986abe9David Goodwin break; 662c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 663c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 664c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 665c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 666c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 667c140c4803dc3e10e08138670829bc0494986abe9David Goodwin bool ForceLRSpill = false; 668f1daf7d8abebd6e0104a6b41a774ccbb19a51c60David Goodwin if (!LRSpilled && AFI->isThumb1OnlyFunction()) { 669c140c4803dc3e10e08138670829bc0494986abe9David Goodwin unsigned FnSize = TII.GetFunctionSizeInBytes(MF); 670c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Force LR to be spilled if the Thumb function size is > 2048. This enables 671c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // use of BL to implement far jump. If it turns out that it's not needed 672c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // then the branch fix up path will undo it. 673c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (FnSize >= (1 << 11)) { 674c140c4803dc3e10e08138670829bc0494986abe9David Goodwin CanEliminateFrame = false; 675c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ForceLRSpill = true; 676c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 677c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 678c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 679c140c4803dc3e10e08138670829bc0494986abe9David Goodwin bool ExtraCSSpill = false; 680010b1b9e7b11bced0b277a4d808226ba2af3044aEvan Cheng if (!CanEliminateFrame || cannotEliminateFrame(MF)) { 681c140c4803dc3e10e08138670829bc0494986abe9David Goodwin AFI->setHasStackFrame(true); 682c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 683c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // If LR is not spilled, but at least one of R4, R5, R6, and R7 is spilled. 684c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Spill LR as well so we can fold BX_RET to the registers restore (LDM). 685c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (!LRSpilled && CS1Spilled) { 686c140c4803dc3e10e08138670829bc0494986abe9David Goodwin MF.getRegInfo().setPhysRegUsed(ARM::LR); 687c140c4803dc3e10e08138670829bc0494986abe9David Goodwin AFI->setCSRegisterIsSpilled(ARM::LR); 688c140c4803dc3e10e08138670829bc0494986abe9David Goodwin NumGPRSpills++; 689c140c4803dc3e10e08138670829bc0494986abe9David Goodwin UnspilledCS1GPRs.erase(std::find(UnspilledCS1GPRs.begin(), 690c140c4803dc3e10e08138670829bc0494986abe9David Goodwin UnspilledCS1GPRs.end(), (unsigned)ARM::LR)); 691c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ForceLRSpill = false; 692c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ExtraCSSpill = true; 693c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 694c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 695c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Darwin ABI requires FP to point to the stack slot that contains the 696c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // previous FP. 697c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (STI.isTargetDarwin() || hasFP(MF)) { 698c140c4803dc3e10e08138670829bc0494986abe9David Goodwin MF.getRegInfo().setPhysRegUsed(FramePtr); 699c140c4803dc3e10e08138670829bc0494986abe9David Goodwin NumGPRSpills++; 700c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 701c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 702c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // If stack and double are 8-byte aligned and we are spilling an odd number 703c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // of GPRs. Spill one extra callee save GPR so we won't have to pad between 704c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // the integer and double callee save areas. 705c140c4803dc3e10e08138670829bc0494986abe9David Goodwin unsigned TargetAlign = MF.getTarget().getFrameInfo()->getStackAlignment(); 706c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (TargetAlign == 8 && (NumGPRSpills & 1)) { 707c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (CS1Spilled && !UnspilledCS1GPRs.empty()) { 708c140c4803dc3e10e08138670829bc0494986abe9David Goodwin for (unsigned i = 0, e = UnspilledCS1GPRs.size(); i != e; ++i) { 709c140c4803dc3e10e08138670829bc0494986abe9David Goodwin unsigned Reg = UnspilledCS1GPRs[i]; 710f1daf7d8abebd6e0104a6b41a774ccbb19a51c60David Goodwin // Don't spill high register if the function is thumb1 711f1daf7d8abebd6e0104a6b41a774ccbb19a51c60David Goodwin if (!AFI->isThumb1OnlyFunction() || 712c140c4803dc3e10e08138670829bc0494986abe9David Goodwin isARMLowRegister(Reg) || Reg == ARM::LR) { 713c140c4803dc3e10e08138670829bc0494986abe9David Goodwin MF.getRegInfo().setPhysRegUsed(Reg); 714c140c4803dc3e10e08138670829bc0494986abe9David Goodwin AFI->setCSRegisterIsSpilled(Reg); 715c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (!isReservedReg(MF, Reg)) 716c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ExtraCSSpill = true; 717c140c4803dc3e10e08138670829bc0494986abe9David Goodwin break; 718c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 719c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 720c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } else if (!UnspilledCS2GPRs.empty() && 721f1daf7d8abebd6e0104a6b41a774ccbb19a51c60David Goodwin !AFI->isThumb1OnlyFunction()) { 722c140c4803dc3e10e08138670829bc0494986abe9David Goodwin unsigned Reg = UnspilledCS2GPRs.front(); 723c140c4803dc3e10e08138670829bc0494986abe9David Goodwin MF.getRegInfo().setPhysRegUsed(Reg); 724c140c4803dc3e10e08138670829bc0494986abe9David Goodwin AFI->setCSRegisterIsSpilled(Reg); 725c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (!isReservedReg(MF, Reg)) 726c140c4803dc3e10e08138670829bc0494986abe9David Goodwin ExtraCSSpill = true; 727c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 728c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 729c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 730c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Estimate if we might need to scavenge a register at some point in order 731c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // to materialize a stack offset. If so, either spill one additional 732c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // callee-saved register or reserve a special spill slot to facilitate 7333d6cb88a64fe67064de206405951eb326d86fc0cJim Grosbach // register scavenging. Thumb1 needs a spill slot for stack pointer 7343d6cb88a64fe67064de206405951eb326d86fc0cJim Grosbach // adjustments also, even when the frame itself is small. 7353d6cb88a64fe67064de206405951eb326d86fc0cJim Grosbach if (RS && !ExtraCSSpill) { 736c140c4803dc3e10e08138670829bc0494986abe9David Goodwin MachineFrameInfo *MFI = MF.getFrameInfo(); 737d1a5ca6cb11763059ba1ee1c965cc69abff92e38Jim Grosbach // If any of the stack slot references may be out of range of an 738d1a5ca6cb11763059ba1ee1c965cc69abff92e38Jim Grosbach // immediate offset, make sure a register (or a spill slot) is 739d1a5ca6cb11763059ba1ee1c965cc69abff92e38Jim Grosbach // available for the register scavenger. Note that if we're indexing 740d1a5ca6cb11763059ba1ee1c965cc69abff92e38Jim Grosbach // off the frame pointer, the effective stack size is 4 bytes larger 741460c482ed38f5c2f91e29eaacf241928d3d77edfJim Grosbach // since the FP points to the stack slot of the previous FP. 742d1a5ca6cb11763059ba1ee1c965cc69abff92e38Jim Grosbach if (estimateStackSize(MF, MFI) + (hasFP(MF) ? 4 : 0) 743540b05d227a79443b2a7b07d5152a35cb6392abfJim Grosbach >= estimateRSStackSizeLimit(MF)) { 744c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // If any non-reserved CS register isn't spilled, just spill one or two 745c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // extra. That should take care of it! 746c140c4803dc3e10e08138670829bc0494986abe9David Goodwin unsigned NumExtras = TargetAlign / 4; 747c140c4803dc3e10e08138670829bc0494986abe9David Goodwin SmallVector<unsigned, 2> Extras; 748c140c4803dc3e10e08138670829bc0494986abe9David Goodwin while (NumExtras && !UnspilledCS1GPRs.empty()) { 749c140c4803dc3e10e08138670829bc0494986abe9David Goodwin unsigned Reg = UnspilledCS1GPRs.back(); 750c140c4803dc3e10e08138670829bc0494986abe9David Goodwin UnspilledCS1GPRs.pop_back(); 751c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (!isReservedReg(MF, Reg)) { 752c140c4803dc3e10e08138670829bc0494986abe9David Goodwin Extras.push_back(Reg); 753c140c4803dc3e10e08138670829bc0494986abe9David Goodwin NumExtras--; 754c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 755c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 75617487ba60d171aa32b17e6c3ad6d5809e78f9868Jim Grosbach // For non-Thumb1 functions, also check for hi-reg CS registers 75717487ba60d171aa32b17e6c3ad6d5809e78f9868Jim Grosbach if (!AFI->isThumb1OnlyFunction()) { 75817487ba60d171aa32b17e6c3ad6d5809e78f9868Jim Grosbach while (NumExtras && !UnspilledCS2GPRs.empty()) { 75917487ba60d171aa32b17e6c3ad6d5809e78f9868Jim Grosbach unsigned Reg = UnspilledCS2GPRs.back(); 76017487ba60d171aa32b17e6c3ad6d5809e78f9868Jim Grosbach UnspilledCS2GPRs.pop_back(); 76117487ba60d171aa32b17e6c3ad6d5809e78f9868Jim Grosbach if (!isReservedReg(MF, Reg)) { 76217487ba60d171aa32b17e6c3ad6d5809e78f9868Jim Grosbach Extras.push_back(Reg); 76317487ba60d171aa32b17e6c3ad6d5809e78f9868Jim Grosbach NumExtras--; 76417487ba60d171aa32b17e6c3ad6d5809e78f9868Jim Grosbach } 765c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 766c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 767c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (Extras.size() && NumExtras == 0) { 768c140c4803dc3e10e08138670829bc0494986abe9David Goodwin for (unsigned i = 0, e = Extras.size(); i != e; ++i) { 769c140c4803dc3e10e08138670829bc0494986abe9David Goodwin MF.getRegInfo().setPhysRegUsed(Extras[i]); 770c140c4803dc3e10e08138670829bc0494986abe9David Goodwin AFI->setCSRegisterIsSpilled(Extras[i]); 771c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 772540b05d227a79443b2a7b07d5152a35cb6392abfJim Grosbach } else if (!AFI->isThumb1OnlyFunction()) { 773540b05d227a79443b2a7b07d5152a35cb6392abfJim Grosbach // note: Thumb1 functions spill to R12, not the stack. 774c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Reserve a slot closest to SP or frame pointer. 775e11a8f565c6a019ddc54667227be9c4d8f117473Jim Grosbach const TargetRegisterClass *RC = ARM::GPRRegisterClass; 776c140c4803dc3e10e08138670829bc0494986abe9David Goodwin RS->setScavengingFrameIndex(MFI->CreateStackObject(RC->getSize(), 7773f2bf85d14759cc4b28a86805f566ac805a54d00David Greene RC->getAlignment(), 7783f2bf85d14759cc4b28a86805f566ac805a54d00David Greene false)); 779c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 780c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 781c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 782c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 783c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 784c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (ForceLRSpill) { 785c140c4803dc3e10e08138670829bc0494986abe9David Goodwin MF.getRegInfo().setPhysRegUsed(ARM::LR); 786c140c4803dc3e10e08138670829bc0494986abe9David Goodwin AFI->setCSRegisterIsSpilled(ARM::LR); 787c140c4803dc3e10e08138670829bc0494986abe9David Goodwin AFI->setLRIsSpilledForFarJump(true); 788c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 789c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 790c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 791c140c4803dc3e10e08138670829bc0494986abe9David Goodwinunsigned ARMBaseRegisterInfo::getRARegister() const { 792c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::LR; 793c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 794c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 7953f2bf85d14759cc4b28a86805f566ac805a54d00David Greeneunsigned 7963f2bf85d14759cc4b28a86805f566ac805a54d00David GreeneARMBaseRegisterInfo::getFrameRegister(const MachineFunction &MF) const { 797c140c4803dc3e10e08138670829bc0494986abe9David Goodwin if (STI.isTargetDarwin() || hasFP(MF)) 798c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return FramePtr; 799c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::SP; 800c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 801c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 80250f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbachint 80350f8516d2dd87e6c02a46fa349b75101f9db8619Jim GrosbachARMBaseRegisterInfo::getFrameIndexReference(MachineFunction &MF, int FI, 80450f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach unsigned &FrameReg) const { 80550f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach const MachineFrameInfo *MFI = MF.getFrameInfo(); 80650f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); 80750f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach int Offset = MFI->getObjectOffset(FI) + MFI->getStackSize(); 80850f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach bool isFixed = MFI->isFixedObjectIndex(FI); 80950f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach 81050f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach if (AFI->isGPRCalleeSavedArea1Frame(FI)) 81150f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach Offset -= AFI->getGPRCalleeSavedArea1Offset(); 81250f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach else if (AFI->isGPRCalleeSavedArea2Frame(FI)) 81350f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach Offset -= AFI->getGPRCalleeSavedArea2Offset(); 81450f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach else if (AFI->isDPRCalleeSavedAreaFrame(FI)) 81550f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach Offset -= AFI->getDPRCalleeSavedAreaOffset(); 81650f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach else if (needsStackRealignment(MF)) { 81750f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach // When dynamically realigning the stack, use the frame pointer for 81850f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach // parameters, and the stack pointer for locals. 81950f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach assert (hasFP(MF) && "dynamic stack realignment without a FP!"); 82050f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach if (isFixed) { 82150f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach FrameReg = getFrameRegister(MF); 82250f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach Offset -= AFI->getFramePtrSpillOffset(); 82350f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach } 82450f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach } else if (hasFP(MF) && AFI->hasStackFrame()) { 82550f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach if (isFixed || MFI->hasVarSizedObjects()) { 82650f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach // Use frame pointer to reference fixed objects unless this is a 82750f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach // frameless function. 82850f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach FrameReg = getFrameRegister(MF); 82950f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach Offset -= AFI->getFramePtrSpillOffset(); 83050f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach } else if (AFI->isThumb2Function()) { 83150f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach // In Thumb2 mode, the negative offset is very limited. 83250f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach int FPOffset = Offset - AFI->getFramePtrSpillOffset(); 83350f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach if (FPOffset >= -255 && FPOffset < 0) { 83450f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach FrameReg = getFrameRegister(MF); 83550f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach Offset = FPOffset; 83650f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach } 83750f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach } 83850f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach } 83950f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach return Offset; 84050f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach} 84150f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach 84250f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach 84350f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbachint 84450f8516d2dd87e6c02a46fa349b75101f9db8619Jim GrosbachARMBaseRegisterInfo::getFrameIndexOffset(MachineFunction &MF, int FI) const { 84550f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach unsigned FrameReg; 84650f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach return getFrameIndexReference(MF, FI, FrameReg); 84750f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach} 84850f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach 849c140c4803dc3e10e08138670829bc0494986abe9David Goodwinunsigned ARMBaseRegisterInfo::getEHExceptionRegister() const { 850c23197a26f34f559ea9797de51e187087c039c42Torok Edwin llvm_unreachable("What is the exception register"); 851c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return 0; 852c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 853c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 854c140c4803dc3e10e08138670829bc0494986abe9David Goodwinunsigned ARMBaseRegisterInfo::getEHHandlerRegister() const { 855c23197a26f34f559ea9797de51e187087c039c42Torok Edwin llvm_unreachable("What is the exception handler register"); 856c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return 0; 857c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 858c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 859c140c4803dc3e10e08138670829bc0494986abe9David Goodwinint ARMBaseRegisterInfo::getDwarfRegNum(unsigned RegNum, bool isEH) const { 860c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARMGenRegisterInfo::getDwarfRegNumFull(RegNum, 0); 861c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 862c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 863c140c4803dc3e10e08138670829bc0494986abe9David Goodwinunsigned ARMBaseRegisterInfo::getRegisterPairEven(unsigned Reg, 864c140c4803dc3e10e08138670829bc0494986abe9David Goodwin const MachineFunction &MF) const { 865c140c4803dc3e10e08138670829bc0494986abe9David Goodwin switch (Reg) { 866c140c4803dc3e10e08138670829bc0494986abe9David Goodwin default: break; 867c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Return 0 if either register of the pair is a special register. 868c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // So no R12, etc. 869c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R1: 870c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::R0; 871c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R3: 8726009751244909c277e6cee8e74a4ccf1846953bcJim Grosbach return ARM::R2; 873c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R5: 874c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::R4; 875c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R7: 876c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return isReservedReg(MF, ARM::R7) ? 0 : ARM::R6; 877c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R9: 878c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return isReservedReg(MF, ARM::R9) ? 0 :ARM::R8; 879c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R11: 880c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return isReservedReg(MF, ARM::R11) ? 0 : ARM::R10; 881c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 882c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S1: 883c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S0; 884c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S3: 885c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S2; 886c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S5: 887c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S4; 888c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S7: 889c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S6; 890c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S9: 891c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S8; 892c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S11: 893c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S10; 894c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S13: 895c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S12; 896c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S15: 897c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S14; 898c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S17: 899c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S16; 900c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S19: 901c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S18; 902c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S21: 903c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S20; 904c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S23: 905c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S22; 906c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S25: 907c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S24; 908c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S27: 909c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S26; 910c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S29: 911c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S28; 912c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S31: 913c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S30; 914c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 915c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::D1: 916c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::D0; 917c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::D3: 918c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::D2; 919c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::D5: 920c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::D4; 921c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::D7: 922c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::D6; 923c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::D9: 924c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::D8; 925c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::D11: 926c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::D10; 927c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::D13: 928c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::D12; 929c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::D15: 930c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::D14; 9318295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case ARM::D17: 9328295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng return ARM::D16; 9338295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case ARM::D19: 9348295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng return ARM::D18; 9358295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case ARM::D21: 9368295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng return ARM::D20; 9378295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case ARM::D23: 9388295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng return ARM::D22; 9398295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case ARM::D25: 9408295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng return ARM::D24; 9418295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case ARM::D27: 9428295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng return ARM::D26; 9438295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case ARM::D29: 9448295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng return ARM::D28; 9458295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case ARM::D31: 9468295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng return ARM::D30; 947c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 948c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 949c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return 0; 950c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 951c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 952c140c4803dc3e10e08138670829bc0494986abe9David Goodwinunsigned ARMBaseRegisterInfo::getRegisterPairOdd(unsigned Reg, 953c140c4803dc3e10e08138670829bc0494986abe9David Goodwin const MachineFunction &MF) const { 954c140c4803dc3e10e08138670829bc0494986abe9David Goodwin switch (Reg) { 955c140c4803dc3e10e08138670829bc0494986abe9David Goodwin default: break; 956c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // Return 0 if either register of the pair is a special register. 957c140c4803dc3e10e08138670829bc0494986abe9David Goodwin // So no R12, etc. 958c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R0: 959c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::R1; 960c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R2: 9616009751244909c277e6cee8e74a4ccf1846953bcJim Grosbach return ARM::R3; 962c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R4: 963c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::R5; 964c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R6: 965c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return isReservedReg(MF, ARM::R7) ? 0 : ARM::R7; 966c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R8: 967c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return isReservedReg(MF, ARM::R9) ? 0 :ARM::R9; 968c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::R10: 969c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return isReservedReg(MF, ARM::R11) ? 0 : ARM::R11; 970c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 971c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S0: 972c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S1; 973c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S2: 974c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S3; 975c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S4: 976c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S5; 977c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S6: 978c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S7; 979c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S8: 980c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S9; 981c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S10: 982c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S11; 983c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S12: 984c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S13; 985c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S14: 986c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S15; 987c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S16: 988c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S17; 989c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S18: 990c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S19; 991c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S20: 992c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S21; 993c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S22: 994c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S23; 995c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S24: 996c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S25; 997c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S26: 998c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S27; 999c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S28: 1000c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S29; 1001c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::S30: 1002c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::S31; 1003c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 1004c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::D0: 1005c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::D1; 1006c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::D2: 1007c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::D3; 1008c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::D4: 1009c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::D5; 1010c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::D6: 1011c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::D7; 1012c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::D8: 1013c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::D9; 1014c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::D10: 1015c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::D11; 1016c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::D12: 1017c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::D13; 1018c140c4803dc3e10e08138670829bc0494986abe9David Goodwin case ARM::D14: 1019c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return ARM::D15; 10208295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case ARM::D16: 10218295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng return ARM::D17; 10228295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case ARM::D18: 10238295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng return ARM::D19; 10248295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case ARM::D20: 10258295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng return ARM::D21; 10268295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case ARM::D22: 10278295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng return ARM::D23; 10288295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case ARM::D24: 10298295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng return ARM::D25; 10308295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case ARM::D26: 10318295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng return ARM::D27; 10328295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case ARM::D28: 10338295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng return ARM::D29; 10348295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng case ARM::D30: 10358295d99bff6f8e3dfdfdaf1871cb72adab423f20Evan Cheng return ARM::D31; 1036c140c4803dc3e10e08138670829bc0494986abe9David Goodwin } 1037c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 1038c140c4803dc3e10e08138670829bc0494986abe9David Goodwin return 0; 1039c140c4803dc3e10e08138670829bc0494986abe9David Goodwin} 1040c140c4803dc3e10e08138670829bc0494986abe9David Goodwin 1041db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin/// emitLoadConstPool - Emits a load from constpool to materialize the 1042db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin/// specified immediate. 1043db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwinvoid ARMBaseRegisterInfo:: 1044db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid GoodwinemitLoadConstPool(MachineBasicBlock &MBB, 1045db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin MachineBasicBlock::iterator &MBBI, 104677521f5232e679aa3de10aaaed2464aa91d7ff55David Goodwin DebugLoc dl, 1047378445303b10b092a898a75131141a8259cff50bEvan Cheng unsigned DestReg, unsigned SubIdx, int Val, 1048db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin ARMCC::CondCodes Pred, 1049db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned PredReg) const { 1050db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin MachineFunction &MF = *MBB.getParent(); 1051db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin MachineConstantPool *ConstantPool = MF.getConstantPool(); 10521d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson Constant *C = 10531d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson ConstantInt::get(Type::getInt32Ty(MF.getFunction()->getContext()), Val); 1054db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned Idx = ConstantPool->getConstantPoolIndex(C, 4); 1055db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1056378445303b10b092a898a75131141a8259cff50bEvan Cheng BuildMI(MBB, MBBI, dl, TII.get(ARM::LDRcp)) 1057378445303b10b092a898a75131141a8259cff50bEvan Cheng .addReg(DestReg, getDefRegState(true), SubIdx) 1058db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin .addConstantPoolIndex(Idx) 1059db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin .addReg(0).addImm(0).addImm(Pred).addReg(PredReg); 1060db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin} 1061db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1062db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwinbool ARMBaseRegisterInfo:: 1063db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid GoodwinrequiresRegisterScavenging(const MachineFunction &MF) const { 1064db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin return true; 1065db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin} 106641fff8c19ab6d8e28f5362481c184ad628f8c704Jim Grosbach 10677e831db1d4f5dc51ca6526739cf41e59895c5c20Jim Grosbachbool ARMBaseRegisterInfo:: 10687e831db1d4f5dc51ca6526739cf41e59895c5c20Jim GrosbachrequiresFrameIndexScavenging(const MachineFunction &MF) const { 1069ca5dfb71ba4aa4a8392a021ec056cf0b70f74f1eJim Grosbach return true; 10707e831db1d4f5dc51ca6526739cf41e59895c5c20Jim Grosbach} 1071db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1072db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin// hasReservedCallFrame - Under normal circumstances, when a frame pointer is 1073db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin// not required, we reserve argument space for call sites in the function 1074db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin// immediately on entry to the current function. This eliminates the need for 1075db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin// add/sub sp brackets around call sites. Returns true if the call frame is 1076db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin// included as part of the stack frame. 1077db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwinbool ARMBaseRegisterInfo:: 1078db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid GoodwinhasReservedCallFrame(MachineFunction &MF) const { 1079db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin const MachineFrameInfo *FFI = MF.getFrameInfo(); 1080db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned CFSize = FFI->getMaxCallFrameSize(); 1081db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // It's not always a good idea to include the call frame as part of the 1082db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // stack frame. ARM (especially Thumb) has small immediate offset to 1083db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // address the stack frame. So a large call frame can cause poor codegen 1084db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // and may even makes it impossible to scavenge a register. 1085db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (CFSize >= ((1 << 12) - 1) / 2) // Half of imm12 1086db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin return false; 1087db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1088db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin return !MF.getFrameInfo()->hasVarSizedObjects(); 1089db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin} 1090db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1091db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwinstatic void 10926495f63945e8dbde81f03a1dc2ab421993b9a495Evan ChengemitSPUpdate(bool isARM, 10936495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, 10946495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng DebugLoc dl, const ARMBaseInstrInfo &TII, 1095db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin int NumBytes, 1096db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin ARMCC::CondCodes Pred = ARMCC::AL, unsigned PredReg = 0) { 10976495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng if (isARM) 10986495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng emitARMRegPlusImmediate(MBB, MBBI, dl, ARM::SP, ARM::SP, NumBytes, 10996495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng Pred, PredReg, TII); 11006495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng else 11016495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng emitT2RegPlusImmediate(MBB, MBBI, dl, ARM::SP, ARM::SP, NumBytes, 11026495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng Pred, PredReg, TII); 1103db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin} 1104db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 11056495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng 1106db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwinvoid ARMBaseRegisterInfo:: 1107db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid GoodwineliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, 1108db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin MachineBasicBlock::iterator I) const { 1109db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (!hasReservedCallFrame(MF)) { 1110db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // If we have alloca, convert as follows: 1111db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // ADJCALLSTACKDOWN -> sub, sp, sp, amount 1112db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // ADJCALLSTACKUP -> add, sp, sp, amount 1113db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin MachineInstr *Old = I; 1114db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin DebugLoc dl = Old->getDebugLoc(); 1115db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned Amount = Old->getOperand(0).getImm(); 1116db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (Amount != 0) { 1117db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // We need to keep the stack aligned properly. To do this, we round the 1118db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // amount of space needed for the outgoing arguments up to the next 1119db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // alignment boundary. 1120db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned Align = MF.getTarget().getFrameInfo()->getStackAlignment(); 1121db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin Amount = (Amount+Align-1)/Align*Align; 1122db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 11236495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); 11246495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng assert(!AFI->isThumb1OnlyFunction() && 11256495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng "This eliminateCallFramePseudoInstr does not suppor Thumb1!"); 11266495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng bool isARM = !AFI->isThumbFunction(); 11276495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng 1128db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // Replace the pseudo instruction with a new instruction... 1129db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned Opc = Old->getOpcode(); 1130db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin ARMCC::CondCodes Pred = (ARMCC::CondCodes)Old->getOperand(1).getImm(); 11316495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng // FIXME: Thumb2 version of ADJCALLSTACKUP and ADJCALLSTACKDOWN? 1132db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (Opc == ARM::ADJCALLSTACKDOWN || Opc == ARM::tADJCALLSTACKDOWN) { 1133db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // Note: PredReg is operand 2 for ADJCALLSTACKDOWN. 1134db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned PredReg = Old->getOperand(2).getReg(); 11356495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng emitSPUpdate(isARM, MBB, I, dl, TII, -Amount, Pred, PredReg); 1136db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } else { 1137db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // Note: PredReg is operand 3 for ADJCALLSTACKUP. 1138db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned PredReg = Old->getOperand(3).getReg(); 1139db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin assert(Opc == ARM::ADJCALLSTACKUP || Opc == ARM::tADJCALLSTACKUP); 11406495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng emitSPUpdate(isARM, MBB, I, dl, TII, Amount, Pred, PredReg); 1141db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } 1142db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } 1143db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } 1144db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin MBB.erase(I); 1145db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin} 1146db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1147b58f498f7502e7e1833decbbbb4df771367c7341Jim Grosbachunsigned 11486495f63945e8dbde81f03a1dc2ab421993b9a495Evan ChengARMBaseRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II, 1149b58f498f7502e7e1833decbbbb4df771367c7341Jim Grosbach int SPAdj, int *Value, 1150b58f498f7502e7e1833decbbbb4df771367c7341Jim Grosbach RegScavenger *RS) const { 11515ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin unsigned i = 0; 11525ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin MachineInstr &MI = *II; 11535ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin MachineBasicBlock &MBB = *MI.getParent(); 11545ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin MachineFunction &MF = *MBB.getParent(); 1155010b1b9e7b11bced0b277a4d808226ba2af3044aEvan Cheng const MachineFrameInfo *MFI = MF.getFrameInfo(); 11565ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); 11576495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng assert(!AFI->isThumb1OnlyFunction() && 1158a15de00f8246f19180b26ee5fe7ff8f436e0de08Bob Wilson "This eliminateFrameIndex does not support Thumb1!"); 11595ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin 11605ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin while (!MI.getOperand(i).isFI()) { 11615ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin ++i; 11625ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin assert(i < MI.getNumOperands() && "Instr doesn't have FrameIndex operand!"); 11635ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin } 11645ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin 11655ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin unsigned FrameReg = ARM::SP; 11665ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin int FrameIndex = MI.getOperand(i).getIndex(); 1167010b1b9e7b11bced0b277a4d808226ba2af3044aEvan Cheng int Offset = MFI->getObjectOffset(FrameIndex) + MFI->getStackSize() + SPAdj; 11685ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin 116950f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach Offset = getFrameIndexReference(MF, FrameIndex, FrameReg); 117050f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach if (FrameReg != ARM::SP) 117150f8516d2dd87e6c02a46fa349b75101f9db8619Jim Grosbach SPAdj = 0; 11725ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin 117348d8afab73d72418cf9505a020f621014920463cEvan Cheng // Modify MI as necessary to handle as much of 'Offset' as possible 1174cdbb3f5d3311e0f46d22bc8daa211b2fab3541cbEvan Cheng bool Done = false; 11756495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng if (!AFI->isThumbFunction()) 1176cdbb3f5d3311e0f46d22bc8daa211b2fab3541cbEvan Cheng Done = rewriteARMFrameIndex(MI, i, FrameReg, Offset, TII); 11776495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng else { 11786495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng assert(AFI->isThumb2Function()); 1179cdbb3f5d3311e0f46d22bc8daa211b2fab3541cbEvan Cheng Done = rewriteT2FrameIndex(MI, i, FrameReg, Offset, TII); 11806495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng } 1181cdbb3f5d3311e0f46d22bc8daa211b2fab3541cbEvan Cheng if (Done) 1182b58f498f7502e7e1833decbbbb4df771367c7341Jim Grosbach return 0; 11835ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin 1184db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // If we get here, the immediate doesn't fit into the instruction. We folded 1185db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // as much as possible above, handle the rest, providing a register that is 1186db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // SP+LargeImm. 118719bb87d0f80f3e6eed38a9fa267bf2b0474aeaabDaniel Dunbar assert((Offset || 1188a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach (MI.getDesc().TSFlags & ARMII::AddrModeMask) == ARMII::AddrMode4 || 1189a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach (MI.getDesc().TSFlags & ARMII::AddrModeMask) == ARMII::AddrMode6) && 1190cdbb3f5d3311e0f46d22bc8daa211b2fab3541cbEvan Cheng "This code isn't needed if offset already handled!"); 1191db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 11927e831db1d4f5dc51ca6526739cf41e59895c5c20Jim Grosbach unsigned ScratchReg = 0; 1193db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin int PIdx = MI.findFirstPredOperandIdx(); 1194db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin ARMCC::CondCodes Pred = (PIdx == -1) 1195db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin ? ARMCC::AL : (ARMCC::CondCodes)MI.getOperand(PIdx).getImm(); 1196db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned PredReg = (PIdx == -1) ? 0 : MI.getOperand(PIdx+1).getReg(); 1197cdbb3f5d3311e0f46d22bc8daa211b2fab3541cbEvan Cheng if (Offset == 0) 1198a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach // Must be addrmode4/6. 1199cdbb3f5d3311e0f46d22bc8daa211b2fab3541cbEvan Cheng MI.getOperand(i).ChangeToRegister(FrameReg, false, false, false); 12006495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng else { 1201ca5dfb71ba4aa4a8392a021ec056cf0b70f74f1eJim Grosbach ScratchReg = MF.getRegInfo().createVirtualRegister(ARM::GPRRegisterClass); 1202ca5dfb71ba4aa4a8392a021ec056cf0b70f74f1eJim Grosbach if (Value) *Value = Offset; 1203cdbb3f5d3311e0f46d22bc8daa211b2fab3541cbEvan Cheng if (!AFI->isThumbFunction()) 1204cdbb3f5d3311e0f46d22bc8daa211b2fab3541cbEvan Cheng emitARMRegPlusImmediate(MBB, II, MI.getDebugLoc(), ScratchReg, FrameReg, 1205cdbb3f5d3311e0f46d22bc8daa211b2fab3541cbEvan Cheng Offset, Pred, PredReg, TII); 1206cdbb3f5d3311e0f46d22bc8daa211b2fab3541cbEvan Cheng else { 1207cdbb3f5d3311e0f46d22bc8daa211b2fab3541cbEvan Cheng assert(AFI->isThumb2Function()); 1208cdbb3f5d3311e0f46d22bc8daa211b2fab3541cbEvan Cheng emitT2RegPlusImmediate(MBB, II, MI.getDebugLoc(), ScratchReg, FrameReg, 1209cdbb3f5d3311e0f46d22bc8daa211b2fab3541cbEvan Cheng Offset, Pred, PredReg, TII); 1210cdbb3f5d3311e0f46d22bc8daa211b2fab3541cbEvan Cheng } 1211cdbb3f5d3311e0f46d22bc8daa211b2fab3541cbEvan Cheng MI.getOperand(i).ChangeToRegister(ScratchReg, false, false, true); 1212ca5dfb71ba4aa4a8392a021ec056cf0b70f74f1eJim Grosbach if (!ReuseFrameIndexVals) 121318ed9c9a2bd7f1f56129495b499264c58b5cc4f4Jim Grosbach ScratchReg = 0; 12146495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng } 12157e831db1d4f5dc51ca6526739cf41e59895c5c20Jim Grosbach return ScratchReg; 1216db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin} 1217db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 12184371cda7f8fc21fc3192ead122ba48b0152fb0e4Jim Grosbach/// Move iterator past the next bunch of callee save load / store ops for 1219db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin/// the particular spill area (1: integer area 1, 2: integer area 2, 1220db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin/// 3: fp area, 0: don't care). 1221db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwinstatic void movePastCSLoadStoreOps(MachineBasicBlock &MBB, 1222db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin MachineBasicBlock::iterator &MBBI, 12235ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin int Opc1, int Opc2, unsigned Area, 1224db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin const ARMSubtarget &STI) { 1225db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin while (MBBI != MBB.end() && 12265ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin ((MBBI->getOpcode() == Opc1) || (MBBI->getOpcode() == Opc2)) && 12275ff58b5c3ab6df332600678798ea5c69c5e943d3David Goodwin MBBI->getOperand(1).isFI()) { 1228db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (Area != 0) { 1229db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin bool Done = false; 1230db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned Category = 0; 1231db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin switch (MBBI->getOperand(0).getReg()) { 1232db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin case ARM::R4: case ARM::R5: case ARM::R6: case ARM::R7: 1233db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin case ARM::LR: 1234db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin Category = 1; 1235db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin break; 1236db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin case ARM::R8: case ARM::R9: case ARM::R10: case ARM::R11: 1237db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin Category = STI.isTargetDarwin() ? 2 : 1; 1238db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin break; 1239db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin case ARM::D8: case ARM::D9: case ARM::D10: case ARM::D11: 1240db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin case ARM::D12: case ARM::D13: case ARM::D14: case ARM::D15: 1241db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin Category = 3; 1242db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin break; 1243db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin default: 1244db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin Done = true; 1245db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin break; 1246db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } 1247db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (Done || Category != Area) 1248db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin break; 1249db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } 1250db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1251db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin ++MBBI; 1252db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } 1253db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin} 1254db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1255db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwinvoid ARMBaseRegisterInfo:: 1256db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid GoodwinemitPrologue(MachineFunction &MF) const { 1257db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin MachineBasicBlock &MBB = MF.front(); 1258db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin MachineBasicBlock::iterator MBBI = MBB.begin(); 1259db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin MachineFrameInfo *MFI = MF.getFrameInfo(); 1260db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); 12616495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng assert(!AFI->isThumb1OnlyFunction() && 12626495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng "This emitPrologue does not suppor Thumb1!"); 12636495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng bool isARM = !AFI->isThumbFunction(); 1264db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned VARegSaveSize = AFI->getVarArgsRegSaveSize(); 1265db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned NumBytes = MFI->getStackSize(); 1266db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo(); 1267db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin DebugLoc dl = (MBBI != MBB.end() ? 1268db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin MBBI->getDebugLoc() : DebugLoc::getUnknownLoc()); 1269db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1270db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // Determine the sizes of each callee-save spill areas and record which frame 1271db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // belongs to which callee-save spill areas. 1272db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned GPRCS1Size = 0, GPRCS2Size = 0, DPRCSSize = 0; 1273db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin int FramePtrSpillFI = 0; 1274db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1275c8ce2d4cb9ef5ff8b3c574e522c870741d88ba58Bob Wilson // Allocate the vararg register save area. This is not counted in NumBytes. 1276db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (VARegSaveSize) 12776495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng emitSPUpdate(isARM, MBB, MBBI, dl, TII, -VARegSaveSize); 1278db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1279db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (!AFI->hasStackFrame()) { 1280db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (NumBytes != 0) 12816495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng emitSPUpdate(isARM, MBB, MBBI, dl, TII, -NumBytes); 1282db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin return; 1283db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } 1284db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1285db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin for (unsigned i = 0, e = CSI.size(); i != e; ++i) { 1286db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned Reg = CSI[i].getReg(); 1287db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin int FI = CSI[i].getFrameIdx(); 1288db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin switch (Reg) { 1289db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin case ARM::R4: 1290db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin case ARM::R5: 1291db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin case ARM::R6: 1292db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin case ARM::R7: 1293db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin case ARM::LR: 1294db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (Reg == FramePtr) 1295db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin FramePtrSpillFI = FI; 1296db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin AFI->addGPRCalleeSavedArea1Frame(FI); 1297db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin GPRCS1Size += 4; 1298db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin break; 1299db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin case ARM::R8: 1300db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin case ARM::R9: 1301db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin case ARM::R10: 1302db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin case ARM::R11: 1303db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (Reg == FramePtr) 1304db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin FramePtrSpillFI = FI; 1305db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (STI.isTargetDarwin()) { 1306db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin AFI->addGPRCalleeSavedArea2Frame(FI); 1307db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin GPRCS2Size += 4; 1308db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } else { 1309db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin AFI->addGPRCalleeSavedArea1Frame(FI); 1310db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin GPRCS1Size += 4; 1311db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } 1312db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin break; 1313db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin default: 1314db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin AFI->addDPRCalleeSavedAreaFrame(FI); 1315db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin DPRCSSize += 8; 1316db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } 1317db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } 1318db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1319db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // Build the new SUBri to adjust SP for integer callee-save spill area 1. 13206495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng emitSPUpdate(isARM, MBB, MBBI, dl, TII, -GPRCS1Size); 13215732ca084aaa0cd26149e50dd4b487efff37fe41Evan Cheng movePastCSLoadStoreOps(MBB, MBBI, ARM::STR, ARM::t2STRi12, 1, STI); 1322db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1323c8ce2d4cb9ef5ff8b3c574e522c870741d88ba58Bob Wilson // Set FP to point to the stack slot that contains the previous FP. 1324c8ce2d4cb9ef5ff8b3c574e522c870741d88ba58Bob Wilson // For Darwin, FP is R7, which has now been stored in spill area 1. 1325c8ce2d4cb9ef5ff8b3c574e522c870741d88ba58Bob Wilson // Otherwise, if this is not Darwin, all the callee-saved registers go 1326c8ce2d4cb9ef5ff8b3c574e522c870741d88ba58Bob Wilson // into spill area 1, including the FP in R11. In either case, it is 1327c8ce2d4cb9ef5ff8b3c574e522c870741d88ba58Bob Wilson // now safe to emit this assignment. 1328db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (STI.isTargetDarwin() || hasFP(MF)) { 13296495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng unsigned ADDriOpc = !AFI->isThumbFunction() ? ARM::ADDri : ARM::t2ADDri; 1330db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin MachineInstrBuilder MIB = 13316495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng BuildMI(MBB, MBBI, dl, TII.get(ADDriOpc), FramePtr) 1332db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin .addFrameIndex(FramePtrSpillFI).addImm(0); 1333db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin AddDefaultCC(AddDefaultPred(MIB)); 1334db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } 1335db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1336db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // Build the new SUBri to adjust SP for integer callee-save spill area 2. 13376495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng emitSPUpdate(isARM, MBB, MBBI, dl, TII, -GPRCS2Size); 1338db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1339db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // Build the new SUBri to adjust SP for FP callee-save spill area. 13405732ca084aaa0cd26149e50dd4b487efff37fe41Evan Cheng movePastCSLoadStoreOps(MBB, MBBI, ARM::STR, ARM::t2STRi12, 2, STI); 13416495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng emitSPUpdate(isARM, MBB, MBBI, dl, TII, -DPRCSSize); 1342db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1343db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // Determine starting offsets of spill areas. 1344db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned DPRCSOffset = NumBytes - (GPRCS1Size + GPRCS2Size + DPRCSSize); 1345db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned GPRCS2Offset = DPRCSOffset + DPRCSSize; 1346db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned GPRCS1Offset = GPRCS2Offset + GPRCS2Size; 1347db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin AFI->setFramePtrSpillOffset(MFI->getObjectOffset(FramePtrSpillFI) + NumBytes); 1348db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin AFI->setGPRCalleeSavedArea1Offset(GPRCS1Offset); 1349db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin AFI->setGPRCalleeSavedArea2Offset(GPRCS2Offset); 1350db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin AFI->setDPRCalleeSavedAreaOffset(DPRCSOffset); 1351db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1352e5165490b7ba24bb2f3043399e0d60e7f3bcf8a5Jim Grosbach movePastCSLoadStoreOps(MBB, MBBI, ARM::VSTRD, 0, 3, STI); 1353db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin NumBytes = DPRCSOffset; 1354db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (NumBytes) { 1355c5848f4ced8f9174e7141c0d2589acaafa13ff35Jim Grosbach // Adjust SP after all the callee-save spills. 13566495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng emitSPUpdate(isARM, MBB, MBBI, dl, TII, -NumBytes); 1357db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } 1358db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1359db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (STI.isTargetELF() && hasFP(MF)) { 1360db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin MFI->setOffsetAdjustment(MFI->getOffsetAdjustment() - 1361db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin AFI->getFramePtrSpillOffset()); 1362db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } 1363db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1364db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin AFI->setGPRCalleeSavedArea1Size(GPRCS1Size); 1365db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin AFI->setGPRCalleeSavedArea2Size(GPRCS2Size); 1366db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin AFI->setDPRCalleeSavedAreaSize(DPRCSSize); 13673dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach 13683dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach // If we need dynamic stack realignment, do it here. 13693dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach if (needsStackRealignment(MF)) { 13703dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach unsigned Opc; 13713dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach unsigned MaxAlign = MFI->getMaxAlignment(); 13723dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach assert (!AFI->isThumb1OnlyFunction()); 13733dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach Opc = AFI->isThumbFunction() ? ARM::t2BICri : ARM::BICri; 13743dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach 13753dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach AddDefaultCC(AddDefaultPred(BuildMI(MBB, MBBI, dl, TII.get(Opc), ARM::SP) 13763dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach .addReg(ARM::SP, RegState::Kill) 13773dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach .addImm(MaxAlign-1))); 13783dab2778571b5bb00b35a0adcb7011dc85158bebJim Grosbach } 1379db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin} 1380db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1381db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwinstatic bool isCalleeSavedRegister(unsigned Reg, const unsigned *CSRegs) { 1382db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin for (unsigned i = 0; CSRegs[i]; ++i) 1383db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (Reg == CSRegs[i]) 1384db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin return true; 1385db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin return false; 1386db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin} 1387db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 138877521f5232e679aa3de10aaaed2464aa91d7ff55David Goodwinstatic bool isCSRestore(MachineInstr *MI, 1389764ab52dd80310a205c9888bf166d09dab858f90Jim Grosbach const ARMBaseInstrInfo &TII, 139077521f5232e679aa3de10aaaed2464aa91d7ff55David Goodwin const unsigned *CSRegs) { 1391e5165490b7ba24bb2f3043399e0d60e7f3bcf8a5Jim Grosbach return ((MI->getOpcode() == (int)ARM::VLDRD || 13925732ca084aaa0cd26149e50dd4b487efff37fe41Evan Cheng MI->getOpcode() == (int)ARM::LDR || 13935732ca084aaa0cd26149e50dd4b487efff37fe41Evan Cheng MI->getOpcode() == (int)ARM::t2LDRi12) && 1394db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin MI->getOperand(1).isFI() && 1395db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin isCalleeSavedRegister(MI->getOperand(0).getReg(), CSRegs)); 1396db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin} 1397db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1398db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwinvoid ARMBaseRegisterInfo:: 1399293f8d9b8800ab68c64b67f38a7f76e00126715dEvan ChengemitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const { 1400db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin MachineBasicBlock::iterator MBBI = prior(MBB.end()); 14015ca53a7ad821613d324e4189ddbb0d468a326146Evan Cheng assert(MBBI->getDesc().isReturn() && 1402db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin "Can only insert epilog into returning blocks"); 1403db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin DebugLoc dl = MBBI->getDebugLoc(); 1404db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin MachineFrameInfo *MFI = MF.getFrameInfo(); 1405db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); 14066495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng assert(!AFI->isThumb1OnlyFunction() && 14076495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng "This emitEpilogue does not suppor Thumb1!"); 14086495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng bool isARM = !AFI->isThumbFunction(); 14096495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng 1410db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin unsigned VARegSaveSize = AFI->getVarArgsRegSaveSize(); 1411db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin int NumBytes = (int)MFI->getStackSize(); 1412db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1413db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (!AFI->hasStackFrame()) { 1414db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (NumBytes != 0) 14156495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng emitSPUpdate(isARM, MBB, MBBI, dl, TII, NumBytes); 1416db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } else { 1417e5165490b7ba24bb2f3043399e0d60e7f3bcf8a5Jim Grosbach // Unwind MBBI to point to first LDR / VLDRD. 1418db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin const unsigned *CSRegs = getCalleeSavedRegs(); 1419db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (MBBI != MBB.begin()) { 1420db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin do 1421db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin --MBBI; 142277521f5232e679aa3de10aaaed2464aa91d7ff55David Goodwin while (MBBI != MBB.begin() && isCSRestore(MBBI, TII, CSRegs)); 142377521f5232e679aa3de10aaaed2464aa91d7ff55David Goodwin if (!isCSRestore(MBBI, TII, CSRegs)) 1424db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin ++MBBI; 1425db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } 1426db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1427db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // Move SP to start of FP callee save spill area. 1428db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin NumBytes -= (AFI->getGPRCalleeSavedArea1Size() + 1429db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin AFI->getGPRCalleeSavedArea2Size() + 1430db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin AFI->getDPRCalleeSavedAreaSize()); 1431db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1432db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // Darwin ABI requires FP to point to the stack slot that contains the 1433db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // previous FP. 1434010b1b9e7b11bced0b277a4d808226ba2af3044aEvan Cheng bool HasFP = hasFP(MF); 1435010b1b9e7b11bced0b277a4d808226ba2af3044aEvan Cheng if ((STI.isTargetDarwin() && NumBytes) || HasFP) { 1436db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin NumBytes = AFI->getFramePtrSpillOffset() - NumBytes; 1437db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // Reset SP based on frame pointer only if the stack frame extends beyond 1438db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // frame pointer stack slot or target is ELF and the function has FP. 1439010b1b9e7b11bced0b277a4d808226ba2af3044aEvan Cheng if (HasFP || 1440010b1b9e7b11bced0b277a4d808226ba2af3044aEvan Cheng AFI->getGPRCalleeSavedArea2Size() || 1441db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin AFI->getDPRCalleeSavedAreaSize() || 1442010b1b9e7b11bced0b277a4d808226ba2af3044aEvan Cheng AFI->getDPRCalleeSavedAreaOffset()) { 14436495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng if (NumBytes) { 1444861986401e05e437cb33bfd8320d510b956fe41eEvan Cheng if (isARM) 1445861986401e05e437cb33bfd8320d510b956fe41eEvan Cheng emitARMRegPlusImmediate(MBB, MBBI, dl, ARM::SP, FramePtr, -NumBytes, 1446861986401e05e437cb33bfd8320d510b956fe41eEvan Cheng ARMCC::AL, 0, TII); 1447861986401e05e437cb33bfd8320d510b956fe41eEvan Cheng else 1448861986401e05e437cb33bfd8320d510b956fe41eEvan Cheng emitT2RegPlusImmediate(MBB, MBBI, dl, ARM::SP, FramePtr, -NumBytes, 1449861986401e05e437cb33bfd8320d510b956fe41eEvan Cheng ARMCC::AL, 0, TII); 14506495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng } else { 14516495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng // Thumb2 or ARM. 1452764ab52dd80310a205c9888bf166d09dab858f90Jim Grosbach if (isARM) 1453052053bbe3169a3574cb5af026cf0a5d616ae04dEvan Cheng BuildMI(MBB, MBBI, dl, TII.get(ARM::MOVr), ARM::SP) 1454052053bbe3169a3574cb5af026cf0a5d616ae04dEvan Cheng .addReg(FramePtr) 1455052053bbe3169a3574cb5af026cf0a5d616ae04dEvan Cheng .addImm((unsigned)ARMCC::AL).addReg(0).addReg(0); 1456052053bbe3169a3574cb5af026cf0a5d616ae04dEvan Cheng else 1457052053bbe3169a3574cb5af026cf0a5d616ae04dEvan Cheng BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVgpr2gpr), ARM::SP) 1458052053bbe3169a3574cb5af026cf0a5d616ae04dEvan Cheng .addReg(FramePtr); 14596495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng } 1460db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } 14616495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng } else if (NumBytes) 14626495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng emitSPUpdate(isARM, MBB, MBBI, dl, TII, NumBytes); 1463db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1464db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // Move SP to start of integer callee save spill area 2. 1465e5165490b7ba24bb2f3043399e0d60e7f3bcf8a5Jim Grosbach movePastCSLoadStoreOps(MBB, MBBI, ARM::VLDRD, 0, 3, STI); 14666495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng emitSPUpdate(isARM, MBB, MBBI, dl, TII, AFI->getDPRCalleeSavedAreaSize()); 1467db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1468db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // Move SP to start of integer callee save spill area 1. 14695732ca084aaa0cd26149e50dd4b487efff37fe41Evan Cheng movePastCSLoadStoreOps(MBB, MBBI, ARM::LDR, ARM::t2LDRi12, 2, STI); 14706495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng emitSPUpdate(isARM, MBB, MBBI, dl, TII, AFI->getGPRCalleeSavedArea2Size()); 1471db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1472db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin // Move SP to SP upon entry to the function. 14735732ca084aaa0cd26149e50dd4b487efff37fe41Evan Cheng movePastCSLoadStoreOps(MBB, MBBI, ARM::LDR, ARM::t2LDRi12, 1, STI); 14746495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng emitSPUpdate(isARM, MBB, MBBI, dl, TII, AFI->getGPRCalleeSavedArea1Size()); 1475db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin } 1476db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1477db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin if (VARegSaveSize) 14786495f63945e8dbde81f03a1dc2ab421993b9a495Evan Cheng emitSPUpdate(isARM, MBB, MBBI, dl, TII, VARegSaveSize); 1479db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin} 1480db5a71a8e01ed9a0d93a19176df6ea0aea510d7bDavid Goodwin 1481a44321776ecd96fa0344335d3027758be3386e45Jim Grosbachnamespace { 14827bde2971330d8d64d6650d002db9c1ce77f4e4d4Jim Grosbach struct MaximalStackAlignmentCalculator : public MachineFunctionPass { 1483a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach static char ID; 14847bde2971330d8d64d6650d002db9c1ce77f4e4d4Jim Grosbach MaximalStackAlignmentCalculator() : MachineFunctionPass(&ID) {} 1485a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach 1486a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach virtual bool runOnMachineFunction(MachineFunction &MF) { 1487a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach MachineFrameInfo *FFI = MF.getFrameInfo(); 1488a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach MachineRegisterInfo &RI = MF.getRegInfo(); 1489a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach 1490a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach // Calculate max stack alignment of all already allocated stack objects. 1491a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach unsigned MaxAlign = calculateMaxStackAlignment(FFI); 1492a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach 1493a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach // Be over-conservative: scan over all vreg defs and find, whether vector 1494a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach // registers are used. If yes - there is probability, that vector register 1495a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach // will be spilled and thus stack needs to be aligned properly. 1496a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach for (unsigned RegNum = TargetRegisterInfo::FirstVirtualRegister; 1497a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach RegNum < RI.getLastVirtReg(); ++RegNum) 1498a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach MaxAlign = std::max(MaxAlign, RI.getRegClass(RegNum)->getAlignment()); 1499a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach 1500a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach if (FFI->getMaxAlignment() == MaxAlign) 1501a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach return false; 1502a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach 1503a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach FFI->setMaxAlignment(MaxAlign); 1504a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach return true; 1505a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach } 1506a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach 1507a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach virtual const char *getPassName() const { 1508074fb0252d20dfc4b03bc902b94e11d9cd8592d8Jim Grosbach return "ARM Stack Required Alignment Auto-Detector"; 1509a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach } 1510a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach 1511a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach virtual void getAnalysisUsage(AnalysisUsage &AU) const { 1512a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach AU.setPreservesCFG(); 1513a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach MachineFunctionPass::getAnalysisUsage(AU); 1514a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach } 1515a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach }; 1516a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach 15177bde2971330d8d64d6650d002db9c1ce77f4e4d4Jim Grosbach char MaximalStackAlignmentCalculator::ID = 0; 1518a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach} 1519a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach 1520a44321776ecd96fa0344335d3027758be3386e45Jim GrosbachFunctionPass* 15217bde2971330d8d64d6650d002db9c1ce77f4e4d4Jim Grosbachllvm::createARMMaxStackAlignmentCalculatorPass() { 15227bde2971330d8d64d6650d002db9c1ce77f4e4d4Jim Grosbach return new MaximalStackAlignmentCalculator(); 15237bde2971330d8d64d6650d002db9c1ce77f4e4d4Jim Grosbach} 1524a44321776ecd96fa0344335d3027758be3386e45Jim Grosbach 1525c140c4803dc3e10e08138670829bc0494986abe9David Goodwin#include "ARMGenRegisterInfo.inc" 1526