Misha Brukman | cf2b9ac | 2002-11-22 22:43:47 +0000 | [diff] [blame] | 1 | //===- X86RegisterInfo.cpp - X86 Register Information -----------*- C++ -*-===// |
Alkis Evlogimenos | 39354c9 | 2004-03-14 07:19:51 +0000 | [diff] [blame] | 2 | // |
John Criswell | b576c94 | 2003-10-20 19:43:21 +0000 | [diff] [blame] | 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 4ee451d | 2007-12-29 20:36:04 +0000 | [diff] [blame] | 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Alkis Evlogimenos | 39354c9 | 2004-03-14 07:19:51 +0000 | [diff] [blame] | 7 | // |
John Criswell | b576c94 | 2003-10-20 19:43:21 +0000 | [diff] [blame] | 8 | //===----------------------------------------------------------------------===// |
Chris Lattner | 7261408 | 2002-10-25 22:55:53 +0000 | [diff] [blame] | 9 | // |
Dan Gohman | 6f0d024 | 2008-02-10 18:45:23 +0000 | [diff] [blame] | 10 | // This file contains the X86 implementation of the TargetRegisterInfo class. |
| 11 | // This file is responsible for the frame pointer elimination optimization |
| 12 | // on X86. |
Chris Lattner | 7261408 | 2002-10-25 22:55:53 +0000 | [diff] [blame] | 13 | // |
| 14 | //===----------------------------------------------------------------------===// |
| 15 | |
Misha Brukman | b83b286 | 2002-11-20 18:59:43 +0000 | [diff] [blame] | 16 | #include "X86.h" |
Chris Lattner | 7261408 | 2002-10-25 22:55:53 +0000 | [diff] [blame] | 17 | #include "X86RegisterInfo.h" |
Misha Brukman | cf2b9ac | 2002-11-22 22:43:47 +0000 | [diff] [blame] | 18 | #include "X86InstrBuilder.h" |
Evan Cheng | e8bd0a3 | 2006-06-06 23:30:24 +0000 | [diff] [blame] | 19 | #include "X86MachineFunctionInfo.h" |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 20 | #include "X86Subtarget.h" |
Evan Cheng | e8bd0a3 | 2006-06-06 23:30:24 +0000 | [diff] [blame] | 21 | #include "X86TargetMachine.h" |
Misha Brukman | b83b286 | 2002-11-20 18:59:43 +0000 | [diff] [blame] | 22 | #include "llvm/Constants.h" |
Evan Cheng | 3649b0e | 2006-06-02 22:38:37 +0000 | [diff] [blame] | 23 | #include "llvm/Function.h" |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 24 | #include "llvm/Type.h" |
Chris Lattner | c8c377d | 2003-07-29 05:14:16 +0000 | [diff] [blame] | 25 | #include "llvm/CodeGen/ValueTypes.h" |
Misha Brukman | b83b286 | 2002-11-20 18:59:43 +0000 | [diff] [blame] | 26 | #include "llvm/CodeGen/MachineInstrBuilder.h" |
Chris Lattner | 198ab64 | 2002-12-15 20:06:35 +0000 | [diff] [blame] | 27 | #include "llvm/CodeGen/MachineFunction.h" |
Dan Gohman | 2dad025 | 2008-07-01 18:15:35 +0000 | [diff] [blame] | 28 | #include "llvm/CodeGen/MachineFunctionPass.h" |
Chris Lattner | aa09b75 | 2002-12-28 21:08:28 +0000 | [diff] [blame] | 29 | #include "llvm/CodeGen/MachineFrameInfo.h" |
Jim Laskey | f1d78e8 | 2006-03-23 18:12:57 +0000 | [diff] [blame] | 30 | #include "llvm/CodeGen/MachineLocation.h" |
Chris Lattner | 84bc542 | 2007-12-31 04:13:23 +0000 | [diff] [blame] | 31 | #include "llvm/CodeGen/MachineModuleInfo.h" |
| 32 | #include "llvm/CodeGen/MachineRegisterInfo.h" |
Chris Lattner | af76e59 | 2009-08-22 20:48:53 +0000 | [diff] [blame] | 33 | #include "llvm/MC/MCAsmInfo.h" |
Chris Lattner | f158da2 | 2003-01-16 02:20:12 +0000 | [diff] [blame] | 34 | #include "llvm/Target/TargetFrameInfo.h" |
Evan Cheng | 51cdcd1 | 2006-12-07 01:21:59 +0000 | [diff] [blame] | 35 | #include "llvm/Target/TargetInstrInfo.h" |
Misha Brukman | 83eaa0b | 2004-06-21 21:10:24 +0000 | [diff] [blame] | 36 | #include "llvm/Target/TargetMachine.h" |
Chris Lattner | 0cf0c37 | 2004-07-11 04:17:10 +0000 | [diff] [blame] | 37 | #include "llvm/Target/TargetOptions.h" |
Evan Cheng | b371f45 | 2007-02-19 21:49:54 +0000 | [diff] [blame] | 38 | #include "llvm/ADT/BitVector.h" |
Reid Spencer | 551ccae | 2004-09-01 22:55:40 +0000 | [diff] [blame] | 39 | #include "llvm/ADT/STLExtras.h" |
Dan Gohman | a4714e0 | 2009-07-30 01:56:29 +0000 | [diff] [blame] | 40 | #include "llvm/Support/CommandLine.h" |
Torok Edwin | c25e758 | 2009-07-11 20:10:48 +0000 | [diff] [blame] | 41 | #include "llvm/Support/ErrorHandling.h" |
Chris Lattner | 300d0ed | 2004-02-14 06:00:36 +0000 | [diff] [blame] | 42 | using namespace llvm; |
Brian Gaeke | d0fde30 | 2003-11-11 22:41:34 +0000 | [diff] [blame] | 43 | |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 44 | X86RegisterInfo::X86RegisterInfo(X86TargetMachine &tm, |
| 45 | const TargetInstrInfo &tii) |
Dan Gohman | 6d4b052 | 2008-10-01 18:28:06 +0000 | [diff] [blame] | 46 | : X86GenRegisterInfo(tm.getSubtarget<X86Subtarget>().is64Bit() ? |
| 47 | X86::ADJCALLSTACKDOWN64 : |
| 48 | X86::ADJCALLSTACKDOWN32, |
| 49 | tm.getSubtarget<X86Subtarget>().is64Bit() ? |
| 50 | X86::ADJCALLSTACKUP64 : |
| 51 | X86::ADJCALLSTACKUP32), |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 52 | TM(tm), TII(tii) { |
| 53 | // Cache some information. |
| 54 | const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>(); |
| 55 | Is64Bit = Subtarget->is64Bit(); |
Anton Korobeynikov | 1dcce21 | 2008-03-22 21:04:01 +0000 | [diff] [blame] | 56 | IsWin64 = Subtarget->isTargetWin64(); |
Evan Cheng | db807ed | 2007-11-05 07:30:01 +0000 | [diff] [blame] | 57 | StackAlign = TM.getFrameInfo()->getStackAlignment(); |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 58 | |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 59 | if (Is64Bit) { |
| 60 | SlotSize = 8; |
| 61 | StackPtr = X86::RSP; |
| 62 | FramePtr = X86::RBP; |
| 63 | } else { |
| 64 | SlotSize = 4; |
| 65 | StackPtr = X86::ESP; |
| 66 | FramePtr = X86::EBP; |
| 67 | } |
| 68 | } |
Chris Lattner | 7ad3e06 | 2003-08-03 15:48:14 +0000 | [diff] [blame] | 69 | |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 70 | /// getDwarfRegNum - This function maps LLVM register identifiers to the DWARF |
| 71 | /// specific numbering, used in debug info and exception tables. |
Dale Johannesen | b97aec6 | 2007-11-13 19:13:01 +0000 | [diff] [blame] | 72 | int X86RegisterInfo::getDwarfRegNum(unsigned RegNo, bool isEH) const { |
Dale Johannesen | 483ec21 | 2007-11-07 00:25:05 +0000 | [diff] [blame] | 73 | const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>(); |
Anton Korobeynikov | f191c80 | 2007-11-11 19:50:10 +0000 | [diff] [blame] | 74 | unsigned Flavour = DWARFFlavour::X86_64; |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 75 | |
Dale Johannesen | 7a42f24 | 2007-11-09 18:07:11 +0000 | [diff] [blame] | 76 | if (!Subtarget->is64Bit()) { |
Anton Korobeynikov | f191c80 | 2007-11-11 19:50:10 +0000 | [diff] [blame] | 77 | if (Subtarget->isTargetDarwin()) { |
Anton Korobeynikov | 8eea339 | 2008-01-25 00:34:13 +0000 | [diff] [blame] | 78 | if (isEH) |
| 79 | Flavour = DWARFFlavour::X86_32_DarwinEH; |
| 80 | else |
| 81 | Flavour = DWARFFlavour::X86_32_Generic; |
Anton Korobeynikov | f191c80 | 2007-11-11 19:50:10 +0000 | [diff] [blame] | 82 | } else if (Subtarget->isTargetCygMing()) { |
| 83 | // Unsupported by now, just quick fallback |
Anton Korobeynikov | 8eea339 | 2008-01-25 00:34:13 +0000 | [diff] [blame] | 84 | Flavour = DWARFFlavour::X86_32_Generic; |
Anton Korobeynikov | f191c80 | 2007-11-11 19:50:10 +0000 | [diff] [blame] | 85 | } else { |
Anton Korobeynikov | 8eea339 | 2008-01-25 00:34:13 +0000 | [diff] [blame] | 86 | Flavour = DWARFFlavour::X86_32_Generic; |
Dale Johannesen | 7a42f24 | 2007-11-09 18:07:11 +0000 | [diff] [blame] | 87 | } |
Dale Johannesen | 483ec21 | 2007-11-07 00:25:05 +0000 | [diff] [blame] | 88 | } |
Anton Korobeynikov | f191c80 | 2007-11-11 19:50:10 +0000 | [diff] [blame] | 89 | |
| 90 | return X86GenRegisterInfo::getDwarfRegNumFull(RegNo, Flavour); |
Dale Johannesen | 483ec21 | 2007-11-07 00:25:05 +0000 | [diff] [blame] | 91 | } |
| 92 | |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 93 | /// getX86RegNum - This function maps LLVM register identifiers to their X86 |
| 94 | /// specific numbering, which is used in various places encoding instructions. |
Nicolas Geoffray | 52e724a | 2008-04-16 20:10:13 +0000 | [diff] [blame] | 95 | unsigned X86RegisterInfo::getX86RegNum(unsigned RegNo) { |
Duncan Sands | ee46574 | 2007-08-29 19:01:20 +0000 | [diff] [blame] | 96 | switch(RegNo) { |
| 97 | case X86::RAX: case X86::EAX: case X86::AX: case X86::AL: return N86::EAX; |
| 98 | case X86::RCX: case X86::ECX: case X86::CX: case X86::CL: return N86::ECX; |
| 99 | case X86::RDX: case X86::EDX: case X86::DX: case X86::DL: return N86::EDX; |
| 100 | case X86::RBX: case X86::EBX: case X86::BX: case X86::BL: return N86::EBX; |
| 101 | case X86::RSP: case X86::ESP: case X86::SP: case X86::SPL: case X86::AH: |
| 102 | return N86::ESP; |
| 103 | case X86::RBP: case X86::EBP: case X86::BP: case X86::BPL: case X86::CH: |
| 104 | return N86::EBP; |
| 105 | case X86::RSI: case X86::ESI: case X86::SI: case X86::SIL: case X86::DH: |
| 106 | return N86::ESI; |
| 107 | case X86::RDI: case X86::EDI: case X86::DI: case X86::DIL: case X86::BH: |
| 108 | return N86::EDI; |
| 109 | |
| 110 | case X86::R8: case X86::R8D: case X86::R8W: case X86::R8B: |
| 111 | return N86::EAX; |
| 112 | case X86::R9: case X86::R9D: case X86::R9W: case X86::R9B: |
| 113 | return N86::ECX; |
| 114 | case X86::R10: case X86::R10D: case X86::R10W: case X86::R10B: |
| 115 | return N86::EDX; |
| 116 | case X86::R11: case X86::R11D: case X86::R11W: case X86::R11B: |
| 117 | return N86::EBX; |
| 118 | case X86::R12: case X86::R12D: case X86::R12W: case X86::R12B: |
| 119 | return N86::ESP; |
| 120 | case X86::R13: case X86::R13D: case X86::R13W: case X86::R13B: |
| 121 | return N86::EBP; |
| 122 | case X86::R14: case X86::R14D: case X86::R14W: case X86::R14B: |
| 123 | return N86::ESI; |
| 124 | case X86::R15: case X86::R15D: case X86::R15W: case X86::R15B: |
| 125 | return N86::EDI; |
| 126 | |
| 127 | case X86::ST0: case X86::ST1: case X86::ST2: case X86::ST3: |
| 128 | case X86::ST4: case X86::ST5: case X86::ST6: case X86::ST7: |
| 129 | return RegNo-X86::ST0; |
| 130 | |
Nate Begeman | 6e041c2 | 2007-12-11 18:06:14 +0000 | [diff] [blame] | 131 | case X86::XMM0: case X86::XMM8: case X86::MM0: |
Evan Cheng | e7c8754 | 2007-11-13 17:54:34 +0000 | [diff] [blame] | 132 | return 0; |
Nate Begeman | 6e041c2 | 2007-12-11 18:06:14 +0000 | [diff] [blame] | 133 | case X86::XMM1: case X86::XMM9: case X86::MM1: |
Evan Cheng | e7c8754 | 2007-11-13 17:54:34 +0000 | [diff] [blame] | 134 | return 1; |
Nate Begeman | 6e041c2 | 2007-12-11 18:06:14 +0000 | [diff] [blame] | 135 | case X86::XMM2: case X86::XMM10: case X86::MM2: |
Evan Cheng | e7c8754 | 2007-11-13 17:54:34 +0000 | [diff] [blame] | 136 | return 2; |
Nate Begeman | 6e041c2 | 2007-12-11 18:06:14 +0000 | [diff] [blame] | 137 | case X86::XMM3: case X86::XMM11: case X86::MM3: |
Evan Cheng | e7c8754 | 2007-11-13 17:54:34 +0000 | [diff] [blame] | 138 | return 3; |
Nate Begeman | 6e041c2 | 2007-12-11 18:06:14 +0000 | [diff] [blame] | 139 | case X86::XMM4: case X86::XMM12: case X86::MM4: |
Evan Cheng | e7c8754 | 2007-11-13 17:54:34 +0000 | [diff] [blame] | 140 | return 4; |
Nate Begeman | 6e041c2 | 2007-12-11 18:06:14 +0000 | [diff] [blame] | 141 | case X86::XMM5: case X86::XMM13: case X86::MM5: |
Evan Cheng | e7c8754 | 2007-11-13 17:54:34 +0000 | [diff] [blame] | 142 | return 5; |
Nate Begeman | 6e041c2 | 2007-12-11 18:06:14 +0000 | [diff] [blame] | 143 | case X86::XMM6: case X86::XMM14: case X86::MM6: |
Evan Cheng | e7c8754 | 2007-11-13 17:54:34 +0000 | [diff] [blame] | 144 | return 6; |
Nate Begeman | 6e041c2 | 2007-12-11 18:06:14 +0000 | [diff] [blame] | 145 | case X86::XMM7: case X86::XMM15: case X86::MM7: |
Evan Cheng | e7c8754 | 2007-11-13 17:54:34 +0000 | [diff] [blame] | 146 | return 7; |
Duncan Sands | ee46574 | 2007-08-29 19:01:20 +0000 | [diff] [blame] | 147 | |
| 148 | default: |
| 149 | assert(isVirtualRegister(RegNo) && "Unknown physical register!"); |
Torok Edwin | c23197a | 2009-07-14 16:55:14 +0000 | [diff] [blame] | 150 | llvm_unreachable("Register allocator hasn't allocated reg correctly yet!"); |
Duncan Sands | ee46574 | 2007-08-29 19:01:20 +0000 | [diff] [blame] | 151 | return 0; |
| 152 | } |
| 153 | } |
| 154 | |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 155 | const TargetRegisterClass * |
| 156 | X86RegisterInfo::getMatchingSuperRegClass(const TargetRegisterClass *A, |
| 157 | const TargetRegisterClass *B, |
| 158 | unsigned SubIdx) const { |
| 159 | switch (SubIdx) { |
| 160 | default: return 0; |
| 161 | case 1: |
| 162 | // 8-bit |
| 163 | if (B == &X86::GR8RegClass) { |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 164 | if (A->getSize() == 2 || A->getSize() == 4 || A->getSize() == 8) |
| 165 | return A; |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 166 | } else if (B == &X86::GR8_ABCD_LRegClass || B == &X86::GR8_ABCD_HRegClass) { |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 167 | if (A == &X86::GR64RegClass || A == &X86::GR64_ABCDRegClass || |
Dan Gohman | a4714e0 | 2009-07-30 01:56:29 +0000 | [diff] [blame] | 168 | A == &X86::GR64_NOREXRegClass || |
| 169 | A == &X86::GR64_NOSPRegClass || |
| 170 | A == &X86::GR64_NOREX_NOSPRegClass) |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 171 | return &X86::GR64_ABCDRegClass; |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 172 | else if (A == &X86::GR32RegClass || A == &X86::GR32_ABCDRegClass || |
Dan Gohman | a4714e0 | 2009-07-30 01:56:29 +0000 | [diff] [blame] | 173 | A == &X86::GR32_NOREXRegClass || |
| 174 | A == &X86::GR32_NOSPRegClass) |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 175 | return &X86::GR32_ABCDRegClass; |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 176 | else if (A == &X86::GR16RegClass || A == &X86::GR16_ABCDRegClass || |
| 177 | A == &X86::GR16_NOREXRegClass) |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 178 | return &X86::GR16_ABCDRegClass; |
| 179 | } else if (B == &X86::GR8_NOREXRegClass) { |
Dan Gohman | a4714e0 | 2009-07-30 01:56:29 +0000 | [diff] [blame] | 180 | if (A == &X86::GR64RegClass || A == &X86::GR64_NOREXRegClass || |
| 181 | A == &X86::GR64_NOSPRegClass || A == &X86::GR64_NOREX_NOSPRegClass) |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 182 | return &X86::GR64_NOREXRegClass; |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 183 | else if (A == &X86::GR64_ABCDRegClass) |
| 184 | return &X86::GR64_ABCDRegClass; |
Dan Gohman | a4714e0 | 2009-07-30 01:56:29 +0000 | [diff] [blame] | 185 | else if (A == &X86::GR32RegClass || A == &X86::GR32_NOREXRegClass || |
| 186 | A == &X86::GR32_NOSPRegClass) |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 187 | return &X86::GR32_NOREXRegClass; |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 188 | else if (A == &X86::GR32_ABCDRegClass) |
| 189 | return &X86::GR32_ABCDRegClass; |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 190 | else if (A == &X86::GR16RegClass || A == &X86::GR16_NOREXRegClass) |
| 191 | return &X86::GR16_NOREXRegClass; |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 192 | else if (A == &X86::GR16_ABCDRegClass) |
| 193 | return &X86::GR16_ABCDRegClass; |
Dan Gohman | 874cada | 2010-02-28 00:17:42 +0000 | [diff] [blame] | 194 | } else if (B == &X86::FR32RegClass) { |
| 195 | return A; |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 196 | } |
| 197 | break; |
| 198 | case 2: |
| 199 | // 8-bit hi |
| 200 | if (B == &X86::GR8_ABCD_HRegClass) { |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 201 | if (A == &X86::GR64RegClass || A == &X86::GR64_ABCDRegClass || |
Dan Gohman | a4714e0 | 2009-07-30 01:56:29 +0000 | [diff] [blame] | 202 | A == &X86::GR64_NOREXRegClass || |
| 203 | A == &X86::GR64_NOSPRegClass || |
| 204 | A == &X86::GR64_NOREX_NOSPRegClass) |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 205 | return &X86::GR64_ABCDRegClass; |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 206 | else if (A == &X86::GR32RegClass || A == &X86::GR32_ABCDRegClass || |
Dan Gohman | a4714e0 | 2009-07-30 01:56:29 +0000 | [diff] [blame] | 207 | A == &X86::GR32_NOREXRegClass || A == &X86::GR32_NOSPRegClass) |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 208 | return &X86::GR32_ABCDRegClass; |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 209 | else if (A == &X86::GR16RegClass || A == &X86::GR16_ABCDRegClass || |
| 210 | A == &X86::GR16_NOREXRegClass) |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 211 | return &X86::GR16_ABCDRegClass; |
Dan Gohman | 874cada | 2010-02-28 00:17:42 +0000 | [diff] [blame] | 212 | } else if (B == &X86::FR64RegClass) { |
| 213 | return A; |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 214 | } |
| 215 | break; |
| 216 | case 3: |
| 217 | // 16-bit |
| 218 | if (B == &X86::GR16RegClass) { |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 219 | if (A->getSize() == 4 || A->getSize() == 8) |
| 220 | return A; |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 221 | } else if (B == &X86::GR16_ABCDRegClass) { |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 222 | if (A == &X86::GR64RegClass || A == &X86::GR64_ABCDRegClass || |
Dan Gohman | a4714e0 | 2009-07-30 01:56:29 +0000 | [diff] [blame] | 223 | A == &X86::GR64_NOREXRegClass || |
| 224 | A == &X86::GR64_NOSPRegClass || |
| 225 | A == &X86::GR64_NOREX_NOSPRegClass) |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 226 | return &X86::GR64_ABCDRegClass; |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 227 | else if (A == &X86::GR32RegClass || A == &X86::GR32_ABCDRegClass || |
Dan Gohman | a4714e0 | 2009-07-30 01:56:29 +0000 | [diff] [blame] | 228 | A == &X86::GR32_NOREXRegClass || A == &X86::GR32_NOSPRegClass) |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 229 | return &X86::GR32_ABCDRegClass; |
| 230 | } else if (B == &X86::GR16_NOREXRegClass) { |
Dan Gohman | a4714e0 | 2009-07-30 01:56:29 +0000 | [diff] [blame] | 231 | if (A == &X86::GR64RegClass || A == &X86::GR64_NOREXRegClass || |
| 232 | A == &X86::GR64_NOSPRegClass || A == &X86::GR64_NOREX_NOSPRegClass) |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 233 | return &X86::GR64_NOREXRegClass; |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 234 | else if (A == &X86::GR64_ABCDRegClass) |
| 235 | return &X86::GR64_ABCDRegClass; |
Dan Gohman | a4714e0 | 2009-07-30 01:56:29 +0000 | [diff] [blame] | 236 | else if (A == &X86::GR32RegClass || A == &X86::GR32_NOREXRegClass || |
| 237 | A == &X86::GR32_NOSPRegClass) |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 238 | return &X86::GR32_NOREXRegClass; |
| 239 | else if (A == &X86::GR32_ABCDRegClass) |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 240 | return &X86::GR64_ABCDRegClass; |
Dan Gohman | 874cada | 2010-02-28 00:17:42 +0000 | [diff] [blame] | 241 | } else if (B == &X86::VR128RegClass) { |
| 242 | return A; |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 243 | } |
| 244 | break; |
| 245 | case 4: |
| 246 | // 32-bit |
Dan Gohman | a4714e0 | 2009-07-30 01:56:29 +0000 | [diff] [blame] | 247 | if (B == &X86::GR32RegClass || B == &X86::GR32_NOSPRegClass) { |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 248 | if (A->getSize() == 8) |
| 249 | return A; |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 250 | } else if (B == &X86::GR32_ABCDRegClass) { |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 251 | if (A == &X86::GR64RegClass || A == &X86::GR64_ABCDRegClass || |
Dan Gohman | a4714e0 | 2009-07-30 01:56:29 +0000 | [diff] [blame] | 252 | A == &X86::GR64_NOREXRegClass || |
| 253 | A == &X86::GR64_NOSPRegClass || |
| 254 | A == &X86::GR64_NOREX_NOSPRegClass) |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 255 | return &X86::GR64_ABCDRegClass; |
| 256 | } else if (B == &X86::GR32_NOREXRegClass) { |
Dan Gohman | a4714e0 | 2009-07-30 01:56:29 +0000 | [diff] [blame] | 257 | if (A == &X86::GR64RegClass || A == &X86::GR64_NOREXRegClass || |
| 258 | A == &X86::GR64_NOSPRegClass || A == &X86::GR64_NOREX_NOSPRegClass) |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 259 | return &X86::GR64_NOREXRegClass; |
Evan Cheng | 753480a | 2009-07-20 19:47:55 +0000 | [diff] [blame] | 260 | else if (A == &X86::GR64_ABCDRegClass) |
| 261 | return &X86::GR64_ABCDRegClass; |
Evan Cheng | 5248468 | 2009-07-18 02:10:10 +0000 | [diff] [blame] | 262 | } |
| 263 | break; |
| 264 | } |
| 265 | return 0; |
| 266 | } |
| 267 | |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 268 | const TargetRegisterClass * |
| 269 | X86RegisterInfo::getPointerRegClass(unsigned Kind) const { |
Dan Gohman | a4714e0 | 2009-07-30 01:56:29 +0000 | [diff] [blame] | 270 | switch (Kind) { |
| 271 | default: llvm_unreachable("Unexpected Kind in getPointerRegClass!"); |
| 272 | case 0: // Normal GPRs. |
| 273 | if (TM.getSubtarget<X86Subtarget>().is64Bit()) |
| 274 | return &X86::GR64RegClass; |
| 275 | return &X86::GR32RegClass; |
| 276 | case 1: // Normal GRPs except the stack pointer (for encoding reasons). |
Dan Gohman | 74f6f9a | 2009-08-05 17:40:24 +0000 | [diff] [blame] | 277 | if (TM.getSubtarget<X86Subtarget>().is64Bit()) |
| 278 | return &X86::GR64_NOSPRegClass; |
| 279 | return &X86::GR32_NOSPRegClass; |
Dan Gohman | a4714e0 | 2009-07-30 01:56:29 +0000 | [diff] [blame] | 280 | } |
Evan Cheng | 770bcc7 | 2009-02-06 17:43:24 +0000 | [diff] [blame] | 281 | } |
| 282 | |
Evan Cheng | ff11026 | 2007-09-26 21:31:07 +0000 | [diff] [blame] | 283 | const TargetRegisterClass * |
| 284 | X86RegisterInfo::getCrossCopyRegClass(const TargetRegisterClass *RC) const { |
Anton Korobeynikov | 4aefd6b | 2008-02-20 12:07:57 +0000 | [diff] [blame] | 285 | if (RC == &X86::CCRRegClass) { |
Evan Cheng | 3f2d9ec | 2007-09-27 21:50:05 +0000 | [diff] [blame] | 286 | if (Is64Bit) |
| 287 | return &X86::GR64RegClass; |
| 288 | else |
| 289 | return &X86::GR32RegClass; |
Anton Korobeynikov | 4aefd6b | 2008-02-20 12:07:57 +0000 | [diff] [blame] | 290 | } |
Evan Cheng | ff11026 | 2007-09-26 21:31:07 +0000 | [diff] [blame] | 291 | return NULL; |
| 292 | } |
Evan Cheng | bf2c8b3 | 2007-03-20 08:09:38 +0000 | [diff] [blame] | 293 | |
Evan Cheng | 64d80e3 | 2007-07-19 01:14:50 +0000 | [diff] [blame] | 294 | const unsigned * |
| 295 | X86RegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const { |
Anton Korobeynikov | b84c167 | 2008-09-08 21:12:47 +0000 | [diff] [blame] | 296 | bool callsEHReturn = false; |
Chris Lattner | 2968943 | 2010-03-11 00:22:57 +0000 | [diff] [blame] | 297 | bool ghcCall = false; |
Anton Korobeynikov | b84c167 | 2008-09-08 21:12:47 +0000 | [diff] [blame] | 298 | |
| 299 | if (MF) { |
| 300 | const MachineFrameInfo *MFI = MF->getFrameInfo(); |
| 301 | const MachineModuleInfo *MMI = MFI->getMachineModuleInfo(); |
| 302 | callsEHReturn = (MMI ? MMI->callsEHReturn() : false); |
Chris Lattner | 2968943 | 2010-03-11 00:22:57 +0000 | [diff] [blame] | 303 | const Function *F = MF->getFunction(); |
| 304 | ghcCall = (F ? F->getCallingConv() == CallingConv::GHC : false); |
Anton Korobeynikov | b84c167 | 2008-09-08 21:12:47 +0000 | [diff] [blame] | 305 | } |
| 306 | |
Chris Lattner | 2968943 | 2010-03-11 00:22:57 +0000 | [diff] [blame] | 307 | static const unsigned GhcCalleeSavedRegs[] = { |
| 308 | 0 |
| 309 | }; |
| 310 | |
Evan Cheng | c2b861d | 2007-01-02 21:33:40 +0000 | [diff] [blame] | 311 | static const unsigned CalleeSavedRegs32Bit[] = { |
Evan Cheng | 0f3ac8d | 2006-05-18 00:12:58 +0000 | [diff] [blame] | 312 | X86::ESI, X86::EDI, X86::EBX, X86::EBP, 0 |
| 313 | }; |
Anton Korobeynikov | 2365f51 | 2007-07-14 14:06:15 +0000 | [diff] [blame] | 314 | |
| 315 | static const unsigned CalleeSavedRegs32EHRet[] = { |
| 316 | X86::EAX, X86::EDX, X86::ESI, X86::EDI, X86::EBX, X86::EBP, 0 |
| 317 | }; |
| 318 | |
Evan Cheng | c2b861d | 2007-01-02 21:33:40 +0000 | [diff] [blame] | 319 | static const unsigned CalleeSavedRegs64Bit[] = { |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 320 | X86::RBX, X86::R12, X86::R13, X86::R14, X86::R15, X86::RBP, 0 |
| 321 | }; |
| 322 | |
Anton Korobeynikov | b84c167 | 2008-09-08 21:12:47 +0000 | [diff] [blame] | 323 | static const unsigned CalleeSavedRegs64EHRet[] = { |
| 324 | X86::RAX, X86::RDX, X86::RBX, X86::R12, |
| 325 | X86::R13, X86::R14, X86::R15, X86::RBP, 0 |
| 326 | }; |
| 327 | |
Anton Korobeynikov | 1dcce21 | 2008-03-22 21:04:01 +0000 | [diff] [blame] | 328 | static const unsigned CalleeSavedRegsWin64[] = { |
Anton Korobeynikov | 5979d71 | 2008-09-24 22:03:04 +0000 | [diff] [blame] | 329 | X86::RBX, X86::RBP, X86::RDI, X86::RSI, |
| 330 | X86::R12, X86::R13, X86::R14, X86::R15, |
| 331 | X86::XMM6, X86::XMM7, X86::XMM8, X86::XMM9, |
| 332 | X86::XMM10, X86::XMM11, X86::XMM12, X86::XMM13, |
| 333 | X86::XMM14, X86::XMM15, 0 |
Anton Korobeynikov | 1dcce21 | 2008-03-22 21:04:01 +0000 | [diff] [blame] | 334 | }; |
| 335 | |
Chris Lattner | 2968943 | 2010-03-11 00:22:57 +0000 | [diff] [blame] | 336 | if (ghcCall) { |
| 337 | return GhcCalleeSavedRegs; |
| 338 | } else if (Is64Bit) { |
Anton Korobeynikov | 1dcce21 | 2008-03-22 21:04:01 +0000 | [diff] [blame] | 339 | if (IsWin64) |
| 340 | return CalleeSavedRegsWin64; |
| 341 | else |
Anton Korobeynikov | b84c167 | 2008-09-08 21:12:47 +0000 | [diff] [blame] | 342 | return (callsEHReturn ? CalleeSavedRegs64EHRet : CalleeSavedRegs64Bit); |
Anton Korobeynikov | 1dcce21 | 2008-03-22 21:04:01 +0000 | [diff] [blame] | 343 | } else { |
Anton Korobeynikov | b84c167 | 2008-09-08 21:12:47 +0000 | [diff] [blame] | 344 | return (callsEHReturn ? CalleeSavedRegs32EHRet : CalleeSavedRegs32Bit); |
Anton Korobeynikov | 2365f51 | 2007-07-14 14:06:15 +0000 | [diff] [blame] | 345 | } |
Evan Cheng | 0f3ac8d | 2006-05-18 00:12:58 +0000 | [diff] [blame] | 346 | } |
| 347 | |
| 348 | const TargetRegisterClass* const* |
Anton Korobeynikov | 2365f51 | 2007-07-14 14:06:15 +0000 | [diff] [blame] | 349 | X86RegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const { |
Anton Korobeynikov | b84c167 | 2008-09-08 21:12:47 +0000 | [diff] [blame] | 350 | bool callsEHReturn = false; |
| 351 | |
| 352 | if (MF) { |
| 353 | const MachineFrameInfo *MFI = MF->getFrameInfo(); |
| 354 | const MachineModuleInfo *MMI = MFI->getMachineModuleInfo(); |
| 355 | callsEHReturn = (MMI ? MMI->callsEHReturn() : false); |
| 356 | } |
| 357 | |
Evan Cheng | c2b861d | 2007-01-02 21:33:40 +0000 | [diff] [blame] | 358 | static const TargetRegisterClass * const CalleeSavedRegClasses32Bit[] = { |
Evan Cheng | 0f3ac8d | 2006-05-18 00:12:58 +0000 | [diff] [blame] | 359 | &X86::GR32RegClass, &X86::GR32RegClass, |
| 360 | &X86::GR32RegClass, &X86::GR32RegClass, 0 |
| 361 | }; |
Anton Korobeynikov | 2365f51 | 2007-07-14 14:06:15 +0000 | [diff] [blame] | 362 | static const TargetRegisterClass * const CalleeSavedRegClasses32EHRet[] = { |
| 363 | &X86::GR32RegClass, &X86::GR32RegClass, |
| 364 | &X86::GR32RegClass, &X86::GR32RegClass, |
| 365 | &X86::GR32RegClass, &X86::GR32RegClass, 0 |
| 366 | }; |
Evan Cheng | c2b861d | 2007-01-02 21:33:40 +0000 | [diff] [blame] | 367 | static const TargetRegisterClass * const CalleeSavedRegClasses64Bit[] = { |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 368 | &X86::GR64RegClass, &X86::GR64RegClass, |
| 369 | &X86::GR64RegClass, &X86::GR64RegClass, |
| 370 | &X86::GR64RegClass, &X86::GR64RegClass, 0 |
| 371 | }; |
Anton Korobeynikov | b84c167 | 2008-09-08 21:12:47 +0000 | [diff] [blame] | 372 | static const TargetRegisterClass * const CalleeSavedRegClasses64EHRet[] = { |
| 373 | &X86::GR64RegClass, &X86::GR64RegClass, |
| 374 | &X86::GR64RegClass, &X86::GR64RegClass, |
| 375 | &X86::GR64RegClass, &X86::GR64RegClass, |
| 376 | &X86::GR64RegClass, &X86::GR64RegClass, 0 |
| 377 | }; |
Anton Korobeynikov | 1dcce21 | 2008-03-22 21:04:01 +0000 | [diff] [blame] | 378 | static const TargetRegisterClass * const CalleeSavedRegClassesWin64[] = { |
Anton Korobeynikov | 5979d71 | 2008-09-24 22:03:04 +0000 | [diff] [blame] | 379 | &X86::GR64RegClass, &X86::GR64RegClass, |
| 380 | &X86::GR64RegClass, &X86::GR64RegClass, |
| 381 | &X86::GR64RegClass, &X86::GR64RegClass, |
| 382 | &X86::GR64RegClass, &X86::GR64RegClass, |
| 383 | &X86::VR128RegClass, &X86::VR128RegClass, |
| 384 | &X86::VR128RegClass, &X86::VR128RegClass, |
| 385 | &X86::VR128RegClass, &X86::VR128RegClass, |
| 386 | &X86::VR128RegClass, &X86::VR128RegClass, |
| 387 | &X86::VR128RegClass, &X86::VR128RegClass, 0 |
Anton Korobeynikov | 1dcce21 | 2008-03-22 21:04:01 +0000 | [diff] [blame] | 388 | }; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 389 | |
Anton Korobeynikov | 1dcce21 | 2008-03-22 21:04:01 +0000 | [diff] [blame] | 390 | if (Is64Bit) { |
| 391 | if (IsWin64) |
| 392 | return CalleeSavedRegClassesWin64; |
| 393 | else |
Anton Korobeynikov | b84c167 | 2008-09-08 21:12:47 +0000 | [diff] [blame] | 394 | return (callsEHReturn ? |
| 395 | CalleeSavedRegClasses64EHRet : CalleeSavedRegClasses64Bit); |
Anton Korobeynikov | 1dcce21 | 2008-03-22 21:04:01 +0000 | [diff] [blame] | 396 | } else { |
Anton Korobeynikov | b84c167 | 2008-09-08 21:12:47 +0000 | [diff] [blame] | 397 | return (callsEHReturn ? |
| 398 | CalleeSavedRegClasses32EHRet : CalleeSavedRegClasses32Bit); |
Anton Korobeynikov | 2365f51 | 2007-07-14 14:06:15 +0000 | [diff] [blame] | 399 | } |
Evan Cheng | 0f3ac8d | 2006-05-18 00:12:58 +0000 | [diff] [blame] | 400 | } |
| 401 | |
Evan Cheng | b371f45 | 2007-02-19 21:49:54 +0000 | [diff] [blame] | 402 | BitVector X86RegisterInfo::getReservedRegs(const MachineFunction &MF) const { |
| 403 | BitVector Reserved(getNumRegs()); |
Dan Gohman | a32b7ac | 2008-12-18 01:05:09 +0000 | [diff] [blame] | 404 | // Set the stack-pointer register and its aliases as reserved. |
Evan Cheng | b371f45 | 2007-02-19 21:49:54 +0000 | [diff] [blame] | 405 | Reserved.set(X86::RSP); |
| 406 | Reserved.set(X86::ESP); |
| 407 | Reserved.set(X86::SP); |
| 408 | Reserved.set(X86::SPL); |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 409 | |
Jakob Stoklund Olesen | 52cd548 | 2009-11-13 21:56:01 +0000 | [diff] [blame] | 410 | // Set the instruction pointer register and its aliases as reserved. |
| 411 | Reserved.set(X86::RIP); |
| 412 | Reserved.set(X86::EIP); |
| 413 | Reserved.set(X86::IP); |
| 414 | |
Dan Gohman | a32b7ac | 2008-12-18 01:05:09 +0000 | [diff] [blame] | 415 | // Set the frame-pointer register and its aliases as reserved if needed. |
Evan Cheng | b371f45 | 2007-02-19 21:49:54 +0000 | [diff] [blame] | 416 | if (hasFP(MF)) { |
| 417 | Reserved.set(X86::RBP); |
| 418 | Reserved.set(X86::EBP); |
| 419 | Reserved.set(X86::BP); |
| 420 | Reserved.set(X86::BPL); |
| 421 | } |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 422 | |
| 423 | // Mark the x87 stack registers as reserved, since they don't behave normally |
| 424 | // with respect to liveness. We don't fully model the effects of x87 stack |
| 425 | // pushes and pops after stackification. |
Dan Gohman | a32b7ac | 2008-12-18 01:05:09 +0000 | [diff] [blame] | 426 | Reserved.set(X86::ST0); |
| 427 | Reserved.set(X86::ST1); |
| 428 | Reserved.set(X86::ST2); |
| 429 | Reserved.set(X86::ST3); |
| 430 | Reserved.set(X86::ST4); |
| 431 | Reserved.set(X86::ST5); |
| 432 | Reserved.set(X86::ST6); |
| 433 | Reserved.set(X86::ST7); |
Evan Cheng | b371f45 | 2007-02-19 21:49:54 +0000 | [diff] [blame] | 434 | return Reserved; |
| 435 | } |
| 436 | |
Chris Lattner | 3c1c03d | 2002-12-28 20:32:28 +0000 | [diff] [blame] | 437 | //===----------------------------------------------------------------------===// |
| 438 | // Stack Frame Processing methods |
| 439 | //===----------------------------------------------------------------------===// |
| 440 | |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 441 | /// hasFP - Return true if the specified function should have a dedicated frame |
| 442 | /// pointer register. This is true if the function has variable sized allocas |
| 443 | /// or if frame pointer elimination is disabled. |
Evan Cheng | dc77540 | 2007-01-23 00:57:47 +0000 | [diff] [blame] | 444 | bool X86RegisterInfo::hasFP(const MachineFunction &MF) const { |
Dan Gohman | 8e5f2c6 | 2008-07-07 23:14:23 +0000 | [diff] [blame] | 445 | const MachineFrameInfo *MFI = MF.getFrameInfo(); |
| 446 | const MachineModuleInfo *MMI = MFI->getMachineModuleInfo(); |
Anton Korobeynikov | 2365f51 | 2007-07-14 14:06:15 +0000 | [diff] [blame] | 447 | |
Anton Korobeynikov | e201190 | 2008-04-23 18:15:11 +0000 | [diff] [blame] | 448 | return (NoFramePointerElim || |
Anton Korobeynikov | 9bbbea5 | 2008-04-23 18:15:48 +0000 | [diff] [blame] | 449 | needsStackRealignment(MF) || |
Evan Cheng | 7e7bbf8 | 2007-07-19 00:42:05 +0000 | [diff] [blame] | 450 | MFI->hasVarSizedObjects() || |
Evan Cheng | 184793f | 2008-09-27 01:56:22 +0000 | [diff] [blame] | 451 | MFI->isFrameAddressTaken() || |
Anton Korobeynikov | 2365f51 | 2007-07-14 14:06:15 +0000 | [diff] [blame] | 452 | MF.getInfo<X86MachineFunctionInfo>()->getForceFramePointer() || |
| 453 | (MMI && MMI->callsUnwindInit())); |
Misha Brukman | 03c6faf | 2002-12-03 23:11:21 +0000 | [diff] [blame] | 454 | } |
Misha Brukman | 2adb395 | 2002-12-04 23:57:03 +0000 | [diff] [blame] | 455 | |
Jim Grosbach | e45ab8a | 2010-01-19 18:31:11 +0000 | [diff] [blame] | 456 | bool X86RegisterInfo::canRealignStack(const MachineFunction &MF) const { |
| 457 | const MachineFrameInfo *MFI = MF.getFrameInfo(); |
| 458 | return (RealignStack && |
| 459 | !MFI->hasVarSizedObjects()); |
| 460 | } |
| 461 | |
Anton Korobeynikov | 9bbbea5 | 2008-04-23 18:15:48 +0000 | [diff] [blame] | 462 | bool X86RegisterInfo::needsStackRealignment(const MachineFunction &MF) const { |
Nick Lewycky | 9c0f146 | 2009-03-19 05:51:39 +0000 | [diff] [blame] | 463 | const MachineFrameInfo *MFI = MF.getFrameInfo(); |
Charles Davis | 5dfa267 | 2010-02-19 18:17:13 +0000 | [diff] [blame] | 464 | const Function *F = MF.getFunction(); |
Anton Korobeynikov | 773943a | 2009-11-08 12:58:40 +0000 | [diff] [blame] | 465 | bool requiresRealignment = |
Charles Davis | 5dfa267 | 2010-02-19 18:17:13 +0000 | [diff] [blame] | 466 | RealignStack && ((MFI->getMaxAlignment() > StackAlign) || |
| 467 | F->hasFnAttr(Attribute::StackAlignment)); |
Anton Korobeynikov | 9bbbea5 | 2008-04-23 18:15:48 +0000 | [diff] [blame] | 468 | |
Anton Korobeynikov | 35410a4 | 2008-04-23 18:16:43 +0000 | [diff] [blame] | 469 | // FIXME: Currently we don't support stack realignment for functions with |
Anton Korobeynikov | b23f3aa | 2009-11-14 18:01:41 +0000 | [diff] [blame] | 470 | // variable-sized allocas. |
| 471 | // FIXME: Temporary disable the error - it seems to be too conservative. |
| 472 | if (0 && requiresRealignment && MFI->hasVarSizedObjects()) |
Anton Korobeynikov | 773943a | 2009-11-08 12:58:40 +0000 | [diff] [blame] | 473 | llvm_report_error( |
| 474 | "Stack realignment in presense of dynamic allocas is not supported"); |
| 475 | |
Anton Korobeynikov | b23f3aa | 2009-11-14 18:01:41 +0000 | [diff] [blame] | 476 | return (requiresRealignment && !MFI->hasVarSizedObjects()); |
Anton Korobeynikov | 9bbbea5 | 2008-04-23 18:15:48 +0000 | [diff] [blame] | 477 | } |
| 478 | |
Evan Cheng | 7e7bbf8 | 2007-07-19 00:42:05 +0000 | [diff] [blame] | 479 | bool X86RegisterInfo::hasReservedCallFrame(MachineFunction &MF) const { |
| 480 | return !MF.getFrameInfo()->hasVarSizedObjects(); |
| 481 | } |
| 482 | |
Evan Cheng | 910139f | 2009-07-09 06:53:48 +0000 | [diff] [blame] | 483 | bool X86RegisterInfo::hasReservedSpillSlot(MachineFunction &MF, unsigned Reg, |
| 484 | int &FrameIdx) const { |
| 485 | if (Reg == FramePtr && hasFP(MF)) { |
| 486 | FrameIdx = MF.getFrameInfo()->getObjectIndexBegin(); |
| 487 | return true; |
| 488 | } |
| 489 | return false; |
| 490 | } |
| 491 | |
Anton Korobeynikov | 82751e3 | 2008-04-23 18:18:36 +0000 | [diff] [blame] | 492 | int |
Chris Lattner | 30c6b75 | 2010-01-26 23:15:09 +0000 | [diff] [blame] | 493 | X86RegisterInfo::getFrameIndexOffset(const MachineFunction &MF, int FI) const { |
Anton Korobeynikov | cf6b739 | 2009-08-03 08:12:53 +0000 | [diff] [blame] | 494 | const TargetFrameInfo &TFI = *MF.getTarget().getFrameInfo(); |
Chris Lattner | 30c6b75 | 2010-01-26 23:15:09 +0000 | [diff] [blame] | 495 | const MachineFrameInfo *MFI = MF.getFrameInfo(); |
Anton Korobeynikov | cf6b739 | 2009-08-03 08:12:53 +0000 | [diff] [blame] | 496 | int Offset = MFI->getObjectOffset(FI) - TFI.getOffsetOfLocalArea(); |
| 497 | uint64_t StackSize = MFI->getStackSize(); |
Anton Korobeynikov | 82751e3 | 2008-04-23 18:18:36 +0000 | [diff] [blame] | 498 | |
Anton Korobeynikov | 8e91ec5 | 2008-04-23 18:21:02 +0000 | [diff] [blame] | 499 | if (needsStackRealignment(MF)) { |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 500 | if (FI < 0) { |
| 501 | // Skip the saved EBP. |
Anton Korobeynikov | 8e91ec5 | 2008-04-23 18:21:02 +0000 | [diff] [blame] | 502 | Offset += SlotSize; |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 503 | } else { |
Anton Korobeynikov | cf6b739 | 2009-08-03 08:12:53 +0000 | [diff] [blame] | 504 | unsigned Align = MFI->getObjectAlignment(FI); |
Evan Cheng | 7545f49 | 2010-02-13 01:56:41 +0000 | [diff] [blame] | 505 | assert((-(Offset + StackSize)) % Align == 0); |
Devang Patel | fd1c6c3 | 2008-12-23 21:56:28 +0000 | [diff] [blame] | 506 | Align = 0; |
Dale Johannesen | b5dae00 | 2008-06-26 01:51:13 +0000 | [diff] [blame] | 507 | return Offset + StackSize; |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 508 | } |
Anton Korobeynikov | 8e91ec5 | 2008-04-23 18:21:02 +0000 | [diff] [blame] | 509 | // FIXME: Support tail calls |
| 510 | } else { |
| 511 | if (!hasFP(MF)) |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 512 | return Offset + StackSize; |
Anton Korobeynikov | 8e91ec5 | 2008-04-23 18:21:02 +0000 | [diff] [blame] | 513 | |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 514 | // Skip the saved EBP. |
Anton Korobeynikov | 8e91ec5 | 2008-04-23 18:21:02 +0000 | [diff] [blame] | 515 | Offset += SlotSize; |
| 516 | |
| 517 | // Skip the RETADDR move area |
Chris Lattner | 30c6b75 | 2010-01-26 23:15:09 +0000 | [diff] [blame] | 518 | const X86MachineFunctionInfo *X86FI = MF.getInfo<X86MachineFunctionInfo>(); |
Anton Korobeynikov | 8e91ec5 | 2008-04-23 18:21:02 +0000 | [diff] [blame] | 519 | int TailCallReturnAddrDelta = X86FI->getTCReturnAddrDelta(); |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 520 | if (TailCallReturnAddrDelta < 0) |
| 521 | Offset -= TailCallReturnAddrDelta; |
Anton Korobeynikov | 8e91ec5 | 2008-04-23 18:21:02 +0000 | [diff] [blame] | 522 | } |
| 523 | |
Anton Korobeynikov | 82751e3 | 2008-04-23 18:18:36 +0000 | [diff] [blame] | 524 | return Offset; |
| 525 | } |
| 526 | |
Chris Lattner | bb07ef9 | 2004-02-14 19:49:54 +0000 | [diff] [blame] | 527 | void X86RegisterInfo:: |
| 528 | eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, |
| 529 | MachineBasicBlock::iterator I) const { |
Evan Cheng | 7e7bbf8 | 2007-07-19 00:42:05 +0000 | [diff] [blame] | 530 | if (!hasReservedCallFrame(MF)) { |
| 531 | // If the stack pointer can be changed after prologue, turn the |
| 532 | // adjcallstackup instruction into a 'sub ESP, <amt>' and the |
| 533 | // adjcallstackdown instruction into 'add ESP, <amt>' |
| 534 | // TODO: consider using push / pop instead of sub + store / add |
Chris Lattner | bb07ef9 | 2004-02-14 19:49:54 +0000 | [diff] [blame] | 535 | MachineInstr *Old = I; |
Chris Lattner | 6180780 | 2007-04-25 04:25:10 +0000 | [diff] [blame] | 536 | uint64_t Amount = Old->getOperand(0).getImm(); |
Chris Lattner | 3c1c03d | 2002-12-28 20:32:28 +0000 | [diff] [blame] | 537 | if (Amount != 0) { |
Chris Lattner | f158da2 | 2003-01-16 02:20:12 +0000 | [diff] [blame] | 538 | // We need to keep the stack aligned properly. To do this, we round the |
| 539 | // amount of space needed for the outgoing arguments up to the next |
| 540 | // alignment boundary. |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 541 | Amount = (Amount + StackAlign - 1) / StackAlign * StackAlign; |
Chris Lattner | f158da2 | 2003-01-16 02:20:12 +0000 | [diff] [blame] | 542 | |
Chris Lattner | 3648c67 | 2005-05-13 21:44:04 +0000 | [diff] [blame] | 543 | MachineInstr *New = 0; |
Dan Gohman | 6d4b052 | 2008-10-01 18:28:06 +0000 | [diff] [blame] | 544 | if (Old->getOpcode() == getCallFrameSetupOpcode()) { |
Dale Johannesen | 21b5541 | 2009-02-12 23:08:38 +0000 | [diff] [blame] | 545 | New = BuildMI(MF, Old->getDebugLoc(), |
| 546 | TII.get(Is64Bit ? X86::SUB64ri32 : X86::SUB32ri), |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 547 | StackPtr) |
| 548 | .addReg(StackPtr) |
| 549 | .addImm(Amount); |
Chris Lattner | 3c1c03d | 2002-12-28 20:32:28 +0000 | [diff] [blame] | 550 | } else { |
Dan Gohman | 6d4b052 | 2008-10-01 18:28:06 +0000 | [diff] [blame] | 551 | assert(Old->getOpcode() == getCallFrameDestroyOpcode()); |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 552 | |
| 553 | // Factor out the amount the callee already popped. |
Chris Lattner | 6180780 | 2007-04-25 04:25:10 +0000 | [diff] [blame] | 554 | uint64_t CalleeAmt = Old->getOperand(1).getImm(); |
Chris Lattner | 3648c67 | 2005-05-13 21:44:04 +0000 | [diff] [blame] | 555 | Amount -= CalleeAmt; |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 556 | |
| 557 | if (Amount) { |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 558 | unsigned Opc = (Amount < 128) ? |
| 559 | (Is64Bit ? X86::ADD64ri8 : X86::ADD32ri8) : |
| 560 | (Is64Bit ? X86::ADD64ri32 : X86::ADD32ri); |
Dale Johannesen | 21b5541 | 2009-02-12 23:08:38 +0000 | [diff] [blame] | 561 | New = BuildMI(MF, Old->getDebugLoc(), TII.get(Opc), StackPtr) |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 562 | .addReg(StackPtr) |
| 563 | .addImm(Amount); |
Chris Lattner | d77525d | 2006-02-03 18:20:04 +0000 | [diff] [blame] | 564 | } |
Chris Lattner | 3c1c03d | 2002-12-28 20:32:28 +0000 | [diff] [blame] | 565 | } |
Chris Lattner | bb07ef9 | 2004-02-14 19:49:54 +0000 | [diff] [blame] | 566 | |
Dan Gohman | d293e0d | 2009-02-11 19:50:24 +0000 | [diff] [blame] | 567 | if (New) { |
| 568 | // The EFLAGS implicit def is dead. |
| 569 | New->getOperand(3).setIsDead(); |
Dan Gohman | bfd23c9 | 2008-12-18 22:03:42 +0000 | [diff] [blame] | 570 | |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 571 | // Replace the pseudo instruction with a new instruction. |
Dan Gohman | d293e0d | 2009-02-11 19:50:24 +0000 | [diff] [blame] | 572 | MBB.insert(I, New); |
| 573 | } |
Chris Lattner | 3648c67 | 2005-05-13 21:44:04 +0000 | [diff] [blame] | 574 | } |
Dan Gohman | 6d4b052 | 2008-10-01 18:28:06 +0000 | [diff] [blame] | 575 | } else if (I->getOpcode() == getCallFrameDestroyOpcode()) { |
Chris Lattner | 3648c67 | 2005-05-13 21:44:04 +0000 | [diff] [blame] | 576 | // If we are performing frame pointer elimination and if the callee pops |
| 577 | // something off the stack pointer, add it back. We do this until we have |
| 578 | // more advanced stack pointer tracking ability. |
Chris Lattner | 6180780 | 2007-04-25 04:25:10 +0000 | [diff] [blame] | 579 | if (uint64_t CalleeAmt = I->getOperand(1).getImm()) { |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 580 | unsigned Opc = (CalleeAmt < 128) ? |
| 581 | (Is64Bit ? X86::SUB64ri8 : X86::SUB32ri8) : |
| 582 | (Is64Bit ? X86::SUB64ri32 : X86::SUB32ri); |
Dale Johannesen | 21b5541 | 2009-02-12 23:08:38 +0000 | [diff] [blame] | 583 | MachineInstr *Old = I; |
Jeff Cohen | 00b16889 | 2005-07-27 06:12:32 +0000 | [diff] [blame] | 584 | MachineInstr *New = |
Dale Johannesen | 21b5541 | 2009-02-12 23:08:38 +0000 | [diff] [blame] | 585 | BuildMI(MF, Old->getDebugLoc(), TII.get(Opc), |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 586 | StackPtr) |
| 587 | .addReg(StackPtr) |
| 588 | .addImm(CalleeAmt); |
| 589 | |
Dan Gohman | bfd23c9 | 2008-12-18 22:03:42 +0000 | [diff] [blame] | 590 | // The EFLAGS implicit def is dead. |
| 591 | New->getOperand(3).setIsDead(); |
Chris Lattner | bb07ef9 | 2004-02-14 19:49:54 +0000 | [diff] [blame] | 592 | MBB.insert(I, New); |
Chris Lattner | 3c1c03d | 2002-12-28 20:32:28 +0000 | [diff] [blame] | 593 | } |
| 594 | } |
| 595 | |
Chris Lattner | bb07ef9 | 2004-02-14 19:49:54 +0000 | [diff] [blame] | 596 | MBB.erase(I); |
Chris Lattner | 3c1c03d | 2002-12-28 20:32:28 +0000 | [diff] [blame] | 597 | } |
| 598 | |
Jim Grosbach | b58f498 | 2009-10-07 17:12:56 +0000 | [diff] [blame] | 599 | unsigned |
| 600 | X86RegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II, |
Jim Grosbach | dff4b4c | 2010-03-09 21:45:49 +0000 | [diff] [blame] | 601 | int SPAdj, FrameIndexValue *Value, |
Jim Grosbach | b58f498 | 2009-10-07 17:12:56 +0000 | [diff] [blame] | 602 | RegScavenger *RS) const{ |
Evan Cheng | 97de913 | 2007-05-01 09:13:03 +0000 | [diff] [blame] | 603 | assert(SPAdj == 0 && "Unexpected"); |
| 604 | |
Chris Lattner | d264bec | 2003-01-13 00:50:33 +0000 | [diff] [blame] | 605 | unsigned i = 0; |
Alkis Evlogimenos | c0b9dc5 | 2004-02-12 02:27:10 +0000 | [diff] [blame] | 606 | MachineInstr &MI = *II; |
Nate Begeman | f8be5e9 | 2004-08-14 22:05:10 +0000 | [diff] [blame] | 607 | MachineFunction &MF = *MI.getParent()->getParent(); |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 608 | |
Dan Gohman | d735b80 | 2008-10-03 15:45:36 +0000 | [diff] [blame] | 609 | while (!MI.getOperand(i).isFI()) { |
Chris Lattner | 3c1c03d | 2002-12-28 20:32:28 +0000 | [diff] [blame] | 610 | ++i; |
| 611 | assert(i < MI.getNumOperands() && "Instr doesn't have FrameIndex operand!"); |
| 612 | } |
| 613 | |
Chris Lattner | 8aa797a | 2007-12-30 23:10:15 +0000 | [diff] [blame] | 614 | int FrameIndex = MI.getOperand(i).getIndex(); |
Anton Korobeynikov | 8e91ec5 | 2008-04-23 18:21:02 +0000 | [diff] [blame] | 615 | unsigned BasePtr; |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 616 | |
Anton Korobeynikov | 8e91ec5 | 2008-04-23 18:21:02 +0000 | [diff] [blame] | 617 | if (needsStackRealignment(MF)) |
| 618 | BasePtr = (FrameIndex < 0 ? FramePtr : StackPtr); |
| 619 | else |
| 620 | BasePtr = (hasFP(MF) ? FramePtr : StackPtr); |
| 621 | |
Chris Lattner | d264bec | 2003-01-13 00:50:33 +0000 | [diff] [blame] | 622 | // This must be part of a four operand memory reference. Replace the |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 623 | // FrameIndex with base register with EBP. Add an offset to the offset. |
Anton Korobeynikov | 8e91ec5 | 2008-04-23 18:21:02 +0000 | [diff] [blame] | 624 | MI.getOperand(i).ChangeToRegister(BasePtr, false); |
Chris Lattner | d264bec | 2003-01-13 00:50:33 +0000 | [diff] [blame] | 625 | |
Dan Gohman | 8277970 | 2008-12-24 00:27:51 +0000 | [diff] [blame] | 626 | // Now add the frame object offset to the offset from EBP. |
| 627 | if (MI.getOperand(i+3).isImm()) { |
| 628 | // Offset is a 32-bit integer. |
| 629 | int Offset = getFrameIndexOffset(MF, FrameIndex) + |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 630 | (int)(MI.getOperand(i + 3).getImm()); |
David Greene | 3f2bf85 | 2009-11-12 20:49:22 +0000 | [diff] [blame] | 631 | |
| 632 | MI.getOperand(i + 3).ChangeToImmediate(Offset); |
Dan Gohman | 8277970 | 2008-12-24 00:27:51 +0000 | [diff] [blame] | 633 | } else { |
| 634 | // Offset is symbolic. This is extremely rare. |
| 635 | uint64_t Offset = getFrameIndexOffset(MF, FrameIndex) + |
| 636 | (uint64_t)MI.getOperand(i+3).getOffset(); |
| 637 | MI.getOperand(i+3).setOffset(Offset); |
| 638 | } |
Jim Grosbach | b58f498 | 2009-10-07 17:12:56 +0000 | [diff] [blame] | 639 | return 0; |
Chris Lattner | 3c1c03d | 2002-12-28 20:32:28 +0000 | [diff] [blame] | 640 | } |
| 641 | |
Chris Lattner | bb07ef9 | 2004-02-14 19:49:54 +0000 | [diff] [blame] | 642 | void |
Anton Korobeynikov | b51dce3 | 2008-04-23 18:20:17 +0000 | [diff] [blame] | 643 | X86RegisterInfo::processFunctionBeforeCalleeSavedScan(MachineFunction &MF, |
| 644 | RegScavenger *RS) const { |
Anton Korobeynikov | cf6b739 | 2009-08-03 08:12:53 +0000 | [diff] [blame] | 645 | MachineFrameInfo *MFI = MF.getFrameInfo(); |
Anton Korobeynikov | b51dce3 | 2008-04-23 18:20:17 +0000 | [diff] [blame] | 646 | |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 647 | X86MachineFunctionInfo *X86FI = MF.getInfo<X86MachineFunctionInfo>(); |
| 648 | int32_t TailCallReturnAddrDelta = X86FI->getTCReturnAddrDelta(); |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 649 | |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 650 | if (TailCallReturnAddrDelta < 0) { |
| 651 | // create RETURNADDR area |
| 652 | // arg |
| 653 | // arg |
| 654 | // RETADDR |
| 655 | // { ... |
| 656 | // RETADDR area |
| 657 | // ... |
| 658 | // } |
| 659 | // [EBP] |
Anton Korobeynikov | cf6b739 | 2009-08-03 08:12:53 +0000 | [diff] [blame] | 660 | MFI->CreateFixedObject(-TailCallReturnAddrDelta, |
David Greene | 3f2bf85 | 2009-11-12 20:49:22 +0000 | [diff] [blame] | 661 | (-1U*SlotSize)+TailCallReturnAddrDelta, |
| 662 | true, false); |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 663 | } |
Anton Korobeynikov | cf6b739 | 2009-08-03 08:12:53 +0000 | [diff] [blame] | 664 | |
Chris Lattner | 3c1c03d | 2002-12-28 20:32:28 +0000 | [diff] [blame] | 665 | if (hasFP(MF)) { |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 666 | assert((TailCallReturnAddrDelta <= 0) && |
| 667 | "The Delta should always be zero or negative"); |
Anton Korobeynikov | dd93f5e | 2009-08-03 08:14:30 +0000 | [diff] [blame] | 668 | const TargetFrameInfo &TFI = *MF.getTarget().getFrameInfo(); |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 669 | |
Chris Lattner | 3c1c03d | 2002-12-28 20:32:28 +0000 | [diff] [blame] | 670 | // Create a frame entry for the EBP register that must be saved. |
Anton Korobeynikov | cf6b739 | 2009-08-03 08:12:53 +0000 | [diff] [blame] | 671 | int FrameIdx = MFI->CreateFixedObject(SlotSize, |
Anton Korobeynikov | dd93f5e | 2009-08-03 08:14:30 +0000 | [diff] [blame] | 672 | -(int)SlotSize + |
| 673 | TFI.getOffsetOfLocalArea() + |
David Greene | 3f2bf85 | 2009-11-12 20:49:22 +0000 | [diff] [blame] | 674 | TailCallReturnAddrDelta, |
| 675 | true, false); |
Anton Korobeynikov | cf6b739 | 2009-08-03 08:12:53 +0000 | [diff] [blame] | 676 | assert(FrameIdx == MFI->getObjectIndexBegin() && |
Chris Lattner | 96c3d2e | 2004-02-15 00:15:37 +0000 | [diff] [blame] | 677 | "Slot for EBP register must be last in order to be found!"); |
Devang Patel | fd1c6c3 | 2008-12-23 21:56:28 +0000 | [diff] [blame] | 678 | FrameIdx = 0; |
Chris Lattner | 3c1c03d | 2002-12-28 20:32:28 +0000 | [diff] [blame] | 679 | } |
| 680 | } |
| 681 | |
Evan Cheng | a24dddd | 2007-04-26 01:09:28 +0000 | [diff] [blame] | 682 | /// emitSPUpdate - Emit a series of instructions to increment / decrement the |
| 683 | /// stack pointer by a constant value. |
| 684 | static |
| 685 | void emitSPUpdate(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, |
| 686 | unsigned StackPtr, int64_t NumBytes, bool Is64Bit, |
| 687 | const TargetInstrInfo &TII) { |
| 688 | bool isSub = NumBytes < 0; |
| 689 | uint64_t Offset = isSub ? -NumBytes : NumBytes; |
| 690 | unsigned Opc = isSub |
| 691 | ? ((Offset < 128) ? |
| 692 | (Is64Bit ? X86::SUB64ri8 : X86::SUB32ri8) : |
| 693 | (Is64Bit ? X86::SUB64ri32 : X86::SUB32ri)) |
| 694 | : ((Offset < 128) ? |
| 695 | (Is64Bit ? X86::ADD64ri8 : X86::ADD32ri8) : |
| 696 | (Is64Bit ? X86::ADD64ri32 : X86::ADD32ri)); |
| 697 | uint64_t Chunk = (1LL << 31) - 1; |
Dale Johannesen | 73e884b | 2010-01-20 21:36:02 +0000 | [diff] [blame] | 698 | DebugLoc DL = MBB.findDebugLoc(MBBI); |
Evan Cheng | a24dddd | 2007-04-26 01:09:28 +0000 | [diff] [blame] | 699 | |
| 700 | while (Offset) { |
| 701 | uint64_t ThisVal = (Offset > Chunk) ? Chunk : Offset; |
Dan Gohman | bfd23c9 | 2008-12-18 22:03:42 +0000 | [diff] [blame] | 702 | MachineInstr *MI = |
Dale Johannesen | 8d13f8f | 2009-02-13 02:33:27 +0000 | [diff] [blame] | 703 | BuildMI(MBB, MBBI, DL, TII.get(Opc), StackPtr) |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 704 | .addReg(StackPtr) |
| 705 | .addImm(ThisVal); |
| 706 | MI->getOperand(3).setIsDead(); // The EFLAGS implicit def is dead. |
Evan Cheng | a24dddd | 2007-04-26 01:09:28 +0000 | [diff] [blame] | 707 | Offset -= ThisVal; |
| 708 | } |
| 709 | } |
| 710 | |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 711 | /// mergeSPUpdatesUp - Merge two stack-manipulating instructions upper iterator. |
Anton Korobeynikov | 4f1c33f | 2007-10-06 16:17:49 +0000 | [diff] [blame] | 712 | static |
| 713 | void mergeSPUpdatesUp(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, |
| 714 | unsigned StackPtr, uint64_t *NumBytes = NULL) { |
Chris Lattner | eac9385 | 2007-10-07 21:53:12 +0000 | [diff] [blame] | 715 | if (MBBI == MBB.begin()) return; |
Anton Korobeynikov | e201190 | 2008-04-23 18:15:11 +0000 | [diff] [blame] | 716 | |
Chris Lattner | eac9385 | 2007-10-07 21:53:12 +0000 | [diff] [blame] | 717 | MachineBasicBlock::iterator PI = prior(MBBI); |
| 718 | unsigned Opc = PI->getOpcode(); |
| 719 | if ((Opc == X86::ADD64ri32 || Opc == X86::ADD64ri8 || |
| 720 | Opc == X86::ADD32ri || Opc == X86::ADD32ri8) && |
| 721 | PI->getOperand(0).getReg() == StackPtr) { |
| 722 | if (NumBytes) |
| 723 | *NumBytes += PI->getOperand(2).getImm(); |
| 724 | MBB.erase(PI); |
| 725 | } else if ((Opc == X86::SUB64ri32 || Opc == X86::SUB64ri8 || |
| 726 | Opc == X86::SUB32ri || Opc == X86::SUB32ri8) && |
| 727 | PI->getOperand(0).getReg() == StackPtr) { |
| 728 | if (NumBytes) |
| 729 | *NumBytes -= PI->getOperand(2).getImm(); |
| 730 | MBB.erase(PI); |
Anton Korobeynikov | 4f1c33f | 2007-10-06 16:17:49 +0000 | [diff] [blame] | 731 | } |
| 732 | } |
| 733 | |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 734 | /// mergeSPUpdatesUp - Merge two stack-manipulating instructions lower iterator. |
Anton Korobeynikov | 2508372 | 2007-10-06 16:39:43 +0000 | [diff] [blame] | 735 | static |
Chris Lattner | eac9385 | 2007-10-07 21:53:12 +0000 | [diff] [blame] | 736 | void mergeSPUpdatesDown(MachineBasicBlock &MBB, |
| 737 | MachineBasicBlock::iterator &MBBI, |
Anton Korobeynikov | 2508372 | 2007-10-06 16:39:43 +0000 | [diff] [blame] | 738 | unsigned StackPtr, uint64_t *NumBytes = NULL) { |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 739 | // FIXME: THIS ISN'T RUN!!! |
Chris Lattner | f443ba7 | 2007-10-07 22:00:31 +0000 | [diff] [blame] | 740 | return; |
Anton Korobeynikov | e201190 | 2008-04-23 18:15:11 +0000 | [diff] [blame] | 741 | |
Chris Lattner | eac9385 | 2007-10-07 21:53:12 +0000 | [diff] [blame] | 742 | if (MBBI == MBB.end()) return; |
Anton Korobeynikov | e201190 | 2008-04-23 18:15:11 +0000 | [diff] [blame] | 743 | |
Chris Lattner | 7896c9f | 2009-12-03 00:50:42 +0000 | [diff] [blame] | 744 | MachineBasicBlock::iterator NI = llvm::next(MBBI); |
Chris Lattner | eac9385 | 2007-10-07 21:53:12 +0000 | [diff] [blame] | 745 | if (NI == MBB.end()) return; |
Anton Korobeynikov | e201190 | 2008-04-23 18:15:11 +0000 | [diff] [blame] | 746 | |
Chris Lattner | eac9385 | 2007-10-07 21:53:12 +0000 | [diff] [blame] | 747 | unsigned Opc = NI->getOpcode(); |
| 748 | if ((Opc == X86::ADD64ri32 || Opc == X86::ADD64ri8 || |
| 749 | Opc == X86::ADD32ri || Opc == X86::ADD32ri8) && |
| 750 | NI->getOperand(0).getReg() == StackPtr) { |
| 751 | if (NumBytes) |
| 752 | *NumBytes -= NI->getOperand(2).getImm(); |
| 753 | MBB.erase(NI); |
| 754 | MBBI = NI; |
| 755 | } else if ((Opc == X86::SUB64ri32 || Opc == X86::SUB64ri8 || |
| 756 | Opc == X86::SUB32ri || Opc == X86::SUB32ri8) && |
| 757 | NI->getOperand(0).getReg() == StackPtr) { |
| 758 | if (NumBytes) |
| 759 | *NumBytes += NI->getOperand(2).getImm(); |
| 760 | MBB.erase(NI); |
| 761 | MBBI = NI; |
Anton Korobeynikov | 2508372 | 2007-10-06 16:39:43 +0000 | [diff] [blame] | 762 | } |
| 763 | } |
| 764 | |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 765 | /// mergeSPUpdates - Checks the instruction before/after the passed |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 766 | /// instruction. If it is an ADD/SUB instruction it is deleted argument and the |
| 767 | /// stack adjustment is returned as a positive value for ADD and a negative for |
| 768 | /// SUB. |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 769 | static int mergeSPUpdates(MachineBasicBlock &MBB, |
| 770 | MachineBasicBlock::iterator &MBBI, |
Anton Korobeynikov | e201190 | 2008-04-23 18:15:11 +0000 | [diff] [blame] | 771 | unsigned StackPtr, |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 772 | bool doMergeWithPrevious) { |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 773 | if ((doMergeWithPrevious && MBBI == MBB.begin()) || |
| 774 | (!doMergeWithPrevious && MBBI == MBB.end())) |
| 775 | return 0; |
| 776 | |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 777 | MachineBasicBlock::iterator PI = doMergeWithPrevious ? prior(MBBI) : MBBI; |
Chris Lattner | 7896c9f | 2009-12-03 00:50:42 +0000 | [diff] [blame] | 778 | MachineBasicBlock::iterator NI = doMergeWithPrevious ? 0 : llvm::next(MBBI); |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 779 | unsigned Opc = PI->getOpcode(); |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 780 | int Offset = 0; |
| 781 | |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 782 | if ((Opc == X86::ADD64ri32 || Opc == X86::ADD64ri8 || |
| 783 | Opc == X86::ADD32ri || Opc == X86::ADD32ri8) && |
| 784 | PI->getOperand(0).getReg() == StackPtr){ |
| 785 | Offset += PI->getOperand(2).getImm(); |
| 786 | MBB.erase(PI); |
| 787 | if (!doMergeWithPrevious) MBBI = NI; |
| 788 | } else if ((Opc == X86::SUB64ri32 || Opc == X86::SUB64ri8 || |
| 789 | Opc == X86::SUB32ri || Opc == X86::SUB32ri8) && |
| 790 | PI->getOperand(0).getReg() == StackPtr) { |
| 791 | Offset -= PI->getOperand(2).getImm(); |
| 792 | MBB.erase(PI); |
| 793 | if (!doMergeWithPrevious) MBBI = NI; |
Anton Korobeynikov | e201190 | 2008-04-23 18:15:11 +0000 | [diff] [blame] | 794 | } |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 795 | |
| 796 | return Offset; |
| 797 | } |
| 798 | |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 799 | void X86RegisterInfo::emitCalleeSavedFrameMoves(MachineFunction &MF, |
| 800 | unsigned LabelId, |
| 801 | unsigned FramePtr) const { |
Anton Korobeynikov | 9bbbea5 | 2008-04-23 18:15:48 +0000 | [diff] [blame] | 802 | MachineFrameInfo *MFI = MF.getFrameInfo(); |
| 803 | MachineModuleInfo *MMI = MFI->getMachineModuleInfo(); |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 804 | if (!MMI) return; |
Anton Korobeynikov | 9bbbea5 | 2008-04-23 18:15:48 +0000 | [diff] [blame] | 805 | |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 806 | // Add callee saved registers to move list. |
| 807 | const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo(); |
| 808 | if (CSI.empty()) return; |
| 809 | |
Anton Korobeynikov | 9bbbea5 | 2008-04-23 18:15:48 +0000 | [diff] [blame] | 810 | std::vector<MachineMove> &Moves = MMI->getFrameMoves(); |
| 811 | const TargetData *TD = MF.getTarget().getTargetData(); |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 812 | bool HasFP = hasFP(MF); |
Anton Korobeynikov | 9bbbea5 | 2008-04-23 18:15:48 +0000 | [diff] [blame] | 813 | |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 814 | // Calculate amount of bytes used for return address storing. |
Anton Korobeynikov | 9bbbea5 | 2008-04-23 18:15:48 +0000 | [diff] [blame] | 815 | int stackGrowth = |
| 816 | (MF.getTarget().getFrameInfo()->getStackGrowthDirection() == |
| 817 | TargetFrameInfo::StackGrowsUp ? |
| 818 | TD->getPointerSize() : -TD->getPointerSize()); |
| 819 | |
Anton Korobeynikov | 9bbbea5 | 2008-04-23 18:15:48 +0000 | [diff] [blame] | 820 | // FIXME: This is dirty hack. The code itself is pretty mess right now. |
| 821 | // It should be rewritten from scratch and generalized sometimes. |
| 822 | |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 823 | // Determine maximum offset (minumum due to stack growth). |
Anton Korobeynikov | 9bbbea5 | 2008-04-23 18:15:48 +0000 | [diff] [blame] | 824 | int64_t MaxOffset = 0; |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 825 | for (std::vector<CalleeSavedInfo>::const_iterator |
| 826 | I = CSI.begin(), E = CSI.end(); I != E; ++I) |
Anton Korobeynikov | 9bbbea5 | 2008-04-23 18:15:48 +0000 | [diff] [blame] | 827 | MaxOffset = std::min(MaxOffset, |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 828 | MFI->getObjectOffset(I->getFrameIdx())); |
Anton Korobeynikov | 9bbbea5 | 2008-04-23 18:15:48 +0000 | [diff] [blame] | 829 | |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 830 | // Calculate offsets. |
| 831 | int64_t saveAreaOffset = (HasFP ? 3 : 2) * stackGrowth; |
| 832 | for (std::vector<CalleeSavedInfo>::const_iterator |
| 833 | I = CSI.begin(), E = CSI.end(); I != E; ++I) { |
| 834 | int64_t Offset = MFI->getObjectOffset(I->getFrameIdx()); |
| 835 | unsigned Reg = I->getReg(); |
| 836 | Offset = MaxOffset - Offset + saveAreaOffset; |
| 837 | |
Duncan Sands | daf2212 | 2009-07-23 19:00:02 +0000 | [diff] [blame] | 838 | // Don't output a new machine move if we're re-saving the frame |
| 839 | // pointer. This happens when the PrologEpilogInserter has inserted an extra |
| 840 | // "PUSH" of the frame pointer -- the "emitPrologue" method automatically |
| 841 | // generates one when frame pointers are used. If we generate a "machine |
| 842 | // move" for this extra "PUSH", the linker will lose track of the fact that |
| 843 | // the frame pointer should have the value of the first "PUSH" when it's |
| 844 | // trying to unwind. |
| 845 | // |
| 846 | // FIXME: This looks inelegant. It's possibly correct, but it's covering up |
| 847 | // another bug. I.e., one where we generate a prolog like this: |
| 848 | // |
| 849 | // pushl %ebp |
| 850 | // movl %esp, %ebp |
| 851 | // pushl %ebp |
| 852 | // pushl %esi |
| 853 | // ... |
| 854 | // |
| 855 | // The immediate re-push of EBP is unnecessary. At the least, it's an |
| 856 | // optimization bug. EBP can be used as a scratch register in certain |
| 857 | // cases, but probably not when we have a frame pointer. |
| 858 | if (HasFP && FramePtr == Reg) |
| 859 | continue; |
| 860 | |
Anton Korobeynikov | 9bbbea5 | 2008-04-23 18:15:48 +0000 | [diff] [blame] | 861 | MachineLocation CSDst(MachineLocation::VirtualFP, Offset); |
| 862 | MachineLocation CSSrc(Reg); |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 863 | Moves.push_back(MachineMove(LabelId, CSDst, CSSrc)); |
Bill Wendling | fe7f294 | 2009-06-16 04:12:45 +0000 | [diff] [blame] | 864 | } |
Anton Korobeynikov | 9bbbea5 | 2008-04-23 18:15:48 +0000 | [diff] [blame] | 865 | } |
| 866 | |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 867 | /// emitPrologue - Push callee-saved registers onto the stack, which |
| 868 | /// automatically adjust the stack pointer. Adjust the stack pointer to allocate |
| 869 | /// space for local variables. Also emit labels used by the exception handler to |
| 870 | /// generate the exception handling frames. |
Chris Lattner | bb07ef9 | 2004-02-14 19:49:54 +0000 | [diff] [blame] | 871 | void X86RegisterInfo::emitPrologue(MachineFunction &MF) const { |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 872 | MachineBasicBlock &MBB = MF.front(); // Prologue goes in entry BB. |
| 873 | MachineBasicBlock::iterator MBBI = MBB.begin(); |
Chris Lattner | eafa423 | 2003-01-15 22:57:35 +0000 | [diff] [blame] | 874 | MachineFrameInfo *MFI = MF.getFrameInfo(); |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 875 | const Function *Fn = MF.getFunction(); |
| 876 | const X86Subtarget *Subtarget = &MF.getTarget().getSubtarget<X86Subtarget>(); |
Jim Laskey | 44c3b9f | 2007-01-26 21:22:28 +0000 | [diff] [blame] | 877 | MachineModuleInfo *MMI = MFI->getMachineModuleInfo(); |
Evan Cheng | 89d1659 | 2007-07-17 07:59:08 +0000 | [diff] [blame] | 878 | X86MachineFunctionInfo *X86FI = MF.getInfo<X86MachineFunctionInfo>(); |
Anton Korobeynikov | e201190 | 2008-04-23 18:15:11 +0000 | [diff] [blame] | 879 | bool needsFrameMoves = (MMI && MMI->hasDebugInfo()) || |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 880 | !Fn->doesNotThrow() || UnwindTablesMandatory; |
| 881 | uint64_t MaxAlign = MFI->getMaxAlignment(); // Desired stack alignment. |
| 882 | uint64_t StackSize = MFI->getStackSize(); // Number of bytes to allocate. |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 883 | bool HasFP = hasFP(MF); |
Devang Patel | 369de26 | 2009-06-17 00:48:26 +0000 | [diff] [blame] | 884 | DebugLoc DL; |
Bill Wendling | 3d2445f | 2009-02-21 00:43:56 +0000 | [diff] [blame] | 885 | |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 886 | // Add RETADDR move area to callee saved frame size. |
| 887 | int TailCallReturnAddrDelta = X86FI->getTCReturnAddrDelta(); |
Anton Korobeynikov | e201190 | 2008-04-23 18:15:11 +0000 | [diff] [blame] | 888 | if (TailCallReturnAddrDelta < 0) |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 889 | X86FI->setCalleeSavedFrameSize( |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 890 | X86FI->getCalleeSavedFrameSize() - TailCallReturnAddrDelta); |
Evan Cheng | d9245ca | 2006-04-14 07:26:43 +0000 | [diff] [blame] | 891 | |
Dan Gohman | 336b636 | 2009-01-27 00:40:06 +0000 | [diff] [blame] | 892 | // If this is x86-64 and the Red Zone is not disabled, if we are a leaf |
| 893 | // function, and use up to 128 bytes of stack space, don't have a frame |
| 894 | // pointer, calls, or dynamic alloca then we do not need to adjust the |
| 895 | // stack pointer (we fit in the Red Zone). |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 896 | if (Is64Bit && !Fn->hasFnAttr(Attribute::NoRedZone) && |
Dan Gohman | 336b636 | 2009-01-27 00:40:06 +0000 | [diff] [blame] | 897 | !needsStackRealignment(MF) && |
| 898 | !MFI->hasVarSizedObjects() && // No dynamic alloca. |
Eli Friedman | 9a41712 | 2009-06-04 02:02:01 +0000 | [diff] [blame] | 899 | !MFI->hasCalls() && // No calls. |
| 900 | !Subtarget->isTargetWin64()) { // Win64 has no Red Zone |
Dan Gohman | 336b636 | 2009-01-27 00:40:06 +0000 | [diff] [blame] | 901 | uint64_t MinSize = X86FI->getCalleeSavedFrameSize(); |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 902 | if (HasFP) MinSize += SlotSize; |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 903 | StackSize = std::max(MinSize, StackSize > 128 ? StackSize - 128 : 0); |
Dan Gohman | 336b636 | 2009-01-27 00:40:06 +0000 | [diff] [blame] | 904 | MFI->setStackSize(StackSize); |
Anton Korobeynikov | cf6b739 | 2009-08-03 08:12:53 +0000 | [diff] [blame] | 905 | } else if (Subtarget->isTargetWin64()) { |
| 906 | // We need to always allocate 32 bytes as register spill area. |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 907 | // FIXME: We might reuse these 32 bytes for leaf functions. |
Anton Korobeynikov | cf6b739 | 2009-08-03 08:12:53 +0000 | [diff] [blame] | 908 | StackSize += 32; |
| 909 | MFI->setStackSize(StackSize); |
Dan Gohman | 336b636 | 2009-01-27 00:40:06 +0000 | [diff] [blame] | 910 | } |
| 911 | |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 912 | // Insert stack pointer adjustment for later moving of return addr. Only |
| 913 | // applies to tail call optimized functions where the callee argument stack |
| 914 | // size is bigger than the callers. |
| 915 | if (TailCallReturnAddrDelta < 0) { |
Dan Gohman | bfd23c9 | 2008-12-18 22:03:42 +0000 | [diff] [blame] | 916 | MachineInstr *MI = |
Dale Johannesen | 21b5541 | 2009-02-12 23:08:38 +0000 | [diff] [blame] | 917 | BuildMI(MBB, MBBI, DL, TII.get(Is64Bit? X86::SUB64ri32 : X86::SUB32ri), |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 918 | StackPtr) |
| 919 | .addReg(StackPtr) |
| 920 | .addImm(-TailCallReturnAddrDelta); |
| 921 | MI->getOperand(3).setIsDead(); // The EFLAGS implicit def is dead. |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 922 | } |
| 923 | |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 924 | // Mapping for machine moves: |
| 925 | // |
| 926 | // DST: VirtualFP AND |
| 927 | // SRC: VirtualFP => DW_CFA_def_cfa_offset |
| 928 | // ELSE => DW_CFA_def_cfa |
| 929 | // |
| 930 | // SRC: VirtualFP AND |
| 931 | // DST: Register => DW_CFA_def_cfa_register |
| 932 | // |
| 933 | // ELSE |
| 934 | // OFFSET < 0 => DW_CFA_offset_extended_sf |
| 935 | // REG < 64 => DW_CFA_offset + Reg |
| 936 | // ELSE => DW_CFA_offset_extended |
| 937 | |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 938 | std::vector<MachineMove> &Moves = MMI->getFrameMoves(); |
| 939 | const TargetData *TD = MF.getTarget().getTargetData(); |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 940 | uint64_t NumBytes = 0; |
Chris Lattner | 464bee1 | 2010-03-13 08:04:35 +0000 | [diff] [blame] | 941 | int stackGrowth = -TD->getPointerSize(); |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 942 | |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 943 | if (HasFP) { |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 944 | // Calculate required stack adjustment. |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 945 | uint64_t FrameSize = StackSize - SlotSize; |
| 946 | if (needsStackRealignment(MF)) |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 947 | FrameSize = (FrameSize + MaxAlign - 1) / MaxAlign * MaxAlign; |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 948 | |
| 949 | NumBytes = FrameSize - X86FI->getCalleeSavedFrameSize(); |
| 950 | |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 951 | // Get the offset of the stack slot for the EBP register, which is |
Evan Cheng | 89d1659 | 2007-07-17 07:59:08 +0000 | [diff] [blame] | 952 | // guaranteed to be the last slot by processFunctionBeforeFrameFinalized. |
| 953 | // Update the frame offset adjustment. |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 954 | MFI->setOffsetAdjustment(-NumBytes); |
Evan Cheng | 89d1659 | 2007-07-17 07:59:08 +0000 | [diff] [blame] | 955 | |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 956 | // Save EBP/RBP into the appropriate stack slot. |
Dale Johannesen | 21b5541 | 2009-02-12 23:08:38 +0000 | [diff] [blame] | 957 | BuildMI(MBB, MBBI, DL, TII.get(Is64Bit ? X86::PUSH64r : X86::PUSH32r)) |
Bill Wendling | 587daed | 2009-05-13 21:33:08 +0000 | [diff] [blame] | 958 | .addReg(FramePtr, RegState::Kill); |
Evan Cheng | 89d1659 | 2007-07-17 07:59:08 +0000 | [diff] [blame] | 959 | |
Bill Wendling | 92c1e12 | 2009-02-13 02:16:35 +0000 | [diff] [blame] | 960 | if (needsFrameMoves) { |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 961 | // Mark the place where EBP/RBP was saved. |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 962 | unsigned FrameLabelId = MMI->NextLabelID(); |
Bill Wendling | 92c1e12 | 2009-02-13 02:16:35 +0000 | [diff] [blame] | 963 | BuildMI(MBB, MBBI, DL, TII.get(X86::DBG_LABEL)).addImm(FrameLabelId); |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 964 | |
| 965 | // Define the current CFA rule to use the provided offset. |
| 966 | if (StackSize) { |
| 967 | MachineLocation SPDst(MachineLocation::VirtualFP); |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 968 | MachineLocation SPSrc(MachineLocation::VirtualFP, 2 * stackGrowth); |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 969 | Moves.push_back(MachineMove(FrameLabelId, SPDst, SPSrc)); |
| 970 | } else { |
| 971 | // FIXME: Verify & implement for FP |
| 972 | MachineLocation SPDst(StackPtr); |
| 973 | MachineLocation SPSrc(StackPtr, stackGrowth); |
| 974 | Moves.push_back(MachineMove(FrameLabelId, SPDst, SPSrc)); |
| 975 | } |
| 976 | |
| 977 | // Change the rule for the FramePtr to be an "offset" rule. |
Chris Lattner | 464bee1 | 2010-03-13 08:04:35 +0000 | [diff] [blame] | 978 | MachineLocation FPDst(MachineLocation::VirtualFP, 2 * stackGrowth); |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 979 | MachineLocation FPSrc(FramePtr); |
| 980 | Moves.push_back(MachineMove(FrameLabelId, FPDst, FPSrc)); |
Bill Wendling | 92c1e12 | 2009-02-13 02:16:35 +0000 | [diff] [blame] | 981 | } |
| 982 | |
Evan Cheng | 89d1659 | 2007-07-17 07:59:08 +0000 | [diff] [blame] | 983 | // Update EBP with the new base value... |
Dale Johannesen | 21b5541 | 2009-02-12 23:08:38 +0000 | [diff] [blame] | 984 | BuildMI(MBB, MBBI, DL, |
| 985 | TII.get(Is64Bit ? X86::MOV64rr : X86::MOV32rr), FramePtr) |
| 986 | .addReg(StackPtr); |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 987 | |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 988 | if (needsFrameMoves) { |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 989 | // Mark effective beginning of when frame pointer becomes valid. |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 990 | unsigned FrameLabelId = MMI->NextLabelID(); |
| 991 | BuildMI(MBB, MBBI, DL, TII.get(X86::DBG_LABEL)).addImm(FrameLabelId); |
| 992 | |
| 993 | // Define the current CFA to use the EBP/RBP register. |
| 994 | MachineLocation FPDst(FramePtr); |
| 995 | MachineLocation FPSrc(MachineLocation::VirtualFP); |
| 996 | Moves.push_back(MachineMove(FrameLabelId, FPDst, FPSrc)); |
| 997 | } |
| 998 | |
Dan Gohman | 34d6ad7 | 2008-12-18 22:01:52 +0000 | [diff] [blame] | 999 | // Mark the FramePtr as live-in in every block except the entry. |
Chris Lattner | 7896c9f | 2009-12-03 00:50:42 +0000 | [diff] [blame] | 1000 | for (MachineFunction::iterator I = llvm::next(MF.begin()), E = MF.end(); |
Dan Gohman | 34d6ad7 | 2008-12-18 22:01:52 +0000 | [diff] [blame] | 1001 | I != E; ++I) |
| 1002 | I->addLiveIn(FramePtr); |
| 1003 | |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 1004 | // Realign stack |
Dan Gohman | bfd23c9 | 2008-12-18 22:03:42 +0000 | [diff] [blame] | 1005 | if (needsStackRealignment(MF)) { |
| 1006 | MachineInstr *MI = |
Dale Johannesen | 21b5541 | 2009-02-12 23:08:38 +0000 | [diff] [blame] | 1007 | BuildMI(MBB, MBBI, DL, |
Dan Gohman | bfd23c9 | 2008-12-18 22:03:42 +0000 | [diff] [blame] | 1008 | TII.get(Is64Bit ? X86::AND64ri32 : X86::AND32ri), |
| 1009 | StackPtr).addReg(StackPtr).addImm(-MaxAlign); |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 1010 | |
Dan Gohman | bfd23c9 | 2008-12-18 22:03:42 +0000 | [diff] [blame] | 1011 | // The EFLAGS implicit def is dead. |
| 1012 | MI->getOperand(3).setIsDead(); |
| 1013 | } |
Bill Wendling | 3d2445f | 2009-02-21 00:43:56 +0000 | [diff] [blame] | 1014 | } else { |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 1015 | NumBytes = StackSize - X86FI->getCalleeSavedFrameSize(); |
Bill Wendling | 3d2445f | 2009-02-21 00:43:56 +0000 | [diff] [blame] | 1016 | } |
Anton Korobeynikov | e201190 | 2008-04-23 18:15:11 +0000 | [diff] [blame] | 1017 | |
Evan Cheng | 89d1659 | 2007-07-17 07:59:08 +0000 | [diff] [blame] | 1018 | // Skip the callee-saved push instructions. |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 1019 | bool PushedRegs = false; |
| 1020 | int StackOffset = 2 * stackGrowth; |
| 1021 | |
Evan Cheng | 89d1659 | 2007-07-17 07:59:08 +0000 | [diff] [blame] | 1022 | while (MBBI != MBB.end() && |
| 1023 | (MBBI->getOpcode() == X86::PUSH32r || |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 1024 | MBBI->getOpcode() == X86::PUSH64r)) { |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 1025 | PushedRegs = true; |
Evan Cheng | 89d1659 | 2007-07-17 07:59:08 +0000 | [diff] [blame] | 1026 | ++MBBI; |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 1027 | |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 1028 | if (!HasFP && needsFrameMoves) { |
| 1029 | // Mark callee-saved push instruction. |
| 1030 | unsigned LabelId = MMI->NextLabelID(); |
| 1031 | BuildMI(MBB, MBBI, DL, TII.get(X86::DBG_LABEL)).addImm(LabelId); |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 1032 | |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 1033 | // Define the current CFA rule to use the provided offset. |
| 1034 | unsigned Ptr = StackSize ? |
| 1035 | MachineLocation::VirtualFP : StackPtr; |
| 1036 | MachineLocation SPDst(Ptr); |
| 1037 | MachineLocation SPSrc(Ptr, StackOffset); |
| 1038 | Moves.push_back(MachineMove(LabelId, SPDst, SPSrc)); |
| 1039 | StackOffset += stackGrowth; |
| 1040 | } |
Bill Wendling | c3d505c | 2009-07-08 21:02:53 +0000 | [diff] [blame] | 1041 | } |
Evan Cheng | 89d1659 | 2007-07-17 07:59:08 +0000 | [diff] [blame] | 1042 | |
Dale Johannesen | 73e884b | 2010-01-20 21:36:02 +0000 | [diff] [blame] | 1043 | DL = MBB.findDebugLoc(MBBI); |
Bill Wendling | 3d2445f | 2009-02-21 00:43:56 +0000 | [diff] [blame] | 1044 | |
Bill Wendling | 3ae67f5 | 2009-06-09 20:08:51 +0000 | [diff] [blame] | 1045 | // Adjust stack pointer: ESP -= numbytes. |
| 1046 | if (NumBytes >= 4096 && Subtarget->isTargetCygMing()) { |
| 1047 | // Check, whether EAX is livein for this function. |
| 1048 | bool isEAXAlive = false; |
| 1049 | for (MachineRegisterInfo::livein_iterator |
Chris Lattner | 84bc542 | 2007-12-31 04:13:23 +0000 | [diff] [blame] | 1050 | II = MF.getRegInfo().livein_begin(), |
| 1051 | EE = MF.getRegInfo().livein_end(); (II != EE) && !isEAXAlive; ++II) { |
Bill Wendling | 3ae67f5 | 2009-06-09 20:08:51 +0000 | [diff] [blame] | 1052 | unsigned Reg = II->first; |
| 1053 | isEAXAlive = (Reg == X86::EAX || Reg == X86::AX || |
| 1054 | Reg == X86::AH || Reg == X86::AL); |
Evan Cheng | 004fb92 | 2006-06-13 05:14:44 +0000 | [diff] [blame] | 1055 | } |
Bill Wendling | 3ae67f5 | 2009-06-09 20:08:51 +0000 | [diff] [blame] | 1056 | |
| 1057 | // Function prologue calls _alloca to probe the stack when allocating more |
| 1058 | // than 4k bytes in one go. Touching the stack at 4K increments is necessary |
| 1059 | // to ensure that the guard pages used by the OS virtual memory manager are |
| 1060 | // allocated in correct sequence. |
| 1061 | if (!isEAXAlive) { |
| 1062 | BuildMI(MBB, MBBI, DL, TII.get(X86::MOV32ri), X86::EAX) |
| 1063 | .addImm(NumBytes); |
| 1064 | BuildMI(MBB, MBBI, DL, TII.get(X86::CALLpcrel32)) |
Anton Korobeynikov | 043f3c2 | 2010-03-06 19:32:29 +0000 | [diff] [blame] | 1065 | .addExternalSymbol("_alloca") |
| 1066 | .addReg(StackPtr, RegState::Define | RegState::Implicit); |
Bill Wendling | 3ae67f5 | 2009-06-09 20:08:51 +0000 | [diff] [blame] | 1067 | } else { |
| 1068 | // Save EAX |
| 1069 | BuildMI(MBB, MBBI, DL, TII.get(X86::PUSH32r)) |
| 1070 | .addReg(X86::EAX, RegState::Kill); |
| 1071 | |
| 1072 | // Allocate NumBytes-4 bytes on stack. We'll also use 4 already |
| 1073 | // allocated bytes for EAX. |
| 1074 | BuildMI(MBB, MBBI, DL, TII.get(X86::MOV32ri), X86::EAX) |
| 1075 | .addImm(NumBytes - 4); |
| 1076 | BuildMI(MBB, MBBI, DL, TII.get(X86::CALLpcrel32)) |
Anton Korobeynikov | 043f3c2 | 2010-03-06 19:32:29 +0000 | [diff] [blame] | 1077 | .addExternalSymbol("_alloca") |
| 1078 | .addReg(StackPtr, RegState::Define | RegState::Implicit); |
Bill Wendling | 3ae67f5 | 2009-06-09 20:08:51 +0000 | [diff] [blame] | 1079 | |
| 1080 | // Restore EAX |
| 1081 | MachineInstr *MI = addRegOffset(BuildMI(MF, DL, TII.get(X86::MOV32rm), |
| 1082 | X86::EAX), |
| 1083 | StackPtr, false, NumBytes - 4); |
| 1084 | MBB.insert(MBBI, MI); |
| 1085 | } |
| 1086 | } else if (NumBytes) { |
| 1087 | // If there is an SUB32ri of ESP immediately before this instruction, merge |
| 1088 | // the two. This can be the case when tail call elimination is enabled and |
| 1089 | // the callee has more arguments then the caller. |
| 1090 | NumBytes -= mergeSPUpdates(MBB, MBBI, StackPtr, true); |
| 1091 | |
| 1092 | // If there is an ADD32ri or SUB32ri of ESP immediately after this |
| 1093 | // instruction, merge the two instructions. |
| 1094 | mergeSPUpdatesDown(MBB, MBBI, StackPtr, &NumBytes); |
| 1095 | |
| 1096 | if (NumBytes) |
| 1097 | emitSPUpdate(MBB, MBBI, StackPtr, -(int64_t)NumBytes, Is64Bit, TII); |
Evan Cheng | d9245ca | 2006-04-14 07:26:43 +0000 | [diff] [blame] | 1098 | } |
Bill Wendling | d15f45f | 2009-07-09 22:30:02 +0000 | [diff] [blame] | 1099 | |
Bill Wendling | eb3a766 | 2009-09-03 22:19:22 +0000 | [diff] [blame] | 1100 | if ((NumBytes || PushedRegs) && needsFrameMoves) { |
Bill Wendling | d15f45f | 2009-07-09 22:30:02 +0000 | [diff] [blame] | 1101 | // Mark end of stack pointer adjustment. |
| 1102 | unsigned LabelId = MMI->NextLabelID(); |
| 1103 | BuildMI(MBB, MBBI, DL, TII.get(X86::DBG_LABEL)).addImm(LabelId); |
| 1104 | |
Bill Wendling | eb3a766 | 2009-09-03 22:19:22 +0000 | [diff] [blame] | 1105 | if (!HasFP && NumBytes) { |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 1106 | // Define the current CFA rule to use the provided offset. |
| 1107 | if (StackSize) { |
| 1108 | MachineLocation SPDst(MachineLocation::VirtualFP); |
| 1109 | MachineLocation SPSrc(MachineLocation::VirtualFP, |
| 1110 | -StackSize + stackGrowth); |
| 1111 | Moves.push_back(MachineMove(LabelId, SPDst, SPSrc)); |
| 1112 | } else { |
| 1113 | // FIXME: Verify & implement for FP |
| 1114 | MachineLocation SPDst(StackPtr); |
| 1115 | MachineLocation SPSrc(StackPtr, stackGrowth); |
| 1116 | Moves.push_back(MachineMove(LabelId, SPDst, SPSrc)); |
| 1117 | } |
Bill Wendling | d15f45f | 2009-07-09 22:30:02 +0000 | [diff] [blame] | 1118 | } |
Bill Wendling | 3f5bb16 | 2009-08-15 21:27:32 +0000 | [diff] [blame] | 1119 | |
| 1120 | // Emit DWARF info specifying the offsets of the callee-saved registers. |
| 1121 | if (PushedRegs) |
| 1122 | emitCalleeSavedFrameMoves(MF, LabelId, HasFP ? FramePtr : StackPtr); |
Bill Wendling | d15f45f | 2009-07-09 22:30:02 +0000 | [diff] [blame] | 1123 | } |
Misha Brukman | 2adb395 | 2002-12-04 23:57:03 +0000 | [diff] [blame] | 1124 | } |
| 1125 | |
Chris Lattner | bb07ef9 | 2004-02-14 19:49:54 +0000 | [diff] [blame] | 1126 | void X86RegisterInfo::emitEpilogue(MachineFunction &MF, |
| 1127 | MachineBasicBlock &MBB) const { |
Chris Lattner | aa09b75 | 2002-12-28 21:08:28 +0000 | [diff] [blame] | 1128 | const MachineFrameInfo *MFI = MF.getFrameInfo(); |
Evan Cheng | 89d1659 | 2007-07-17 07:59:08 +0000 | [diff] [blame] | 1129 | X86MachineFunctionInfo *X86FI = MF.getInfo<X86MachineFunctionInfo>(); |
Alkis Evlogimenos | f81af21 | 2004-02-14 01:18:34 +0000 | [diff] [blame] | 1130 | MachineBasicBlock::iterator MBBI = prior(MBB.end()); |
Anton Korobeynikov | 2365f51 | 2007-07-14 14:06:15 +0000 | [diff] [blame] | 1131 | unsigned RetOpcode = MBBI->getOpcode(); |
Bill Wendling | 2625f9b | 2009-02-21 00:32:08 +0000 | [diff] [blame] | 1132 | DebugLoc DL = MBBI->getDebugLoc(); |
Chris Lattner | 2b3d56e | 2005-05-14 23:35:21 +0000 | [diff] [blame] | 1133 | |
Anton Korobeynikov | 2365f51 | 2007-07-14 14:06:15 +0000 | [diff] [blame] | 1134 | switch (RetOpcode) { |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 1135 | default: |
| 1136 | llvm_unreachable("Can only insert epilog into returning blocks"); |
Chris Lattner | 2b3d56e | 2005-05-14 23:35:21 +0000 | [diff] [blame] | 1137 | case X86::RET: |
| 1138 | case X86::RETI: |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 1139 | case X86::TCRETURNdi: |
| 1140 | case X86::TCRETURNri: |
Evan Cheng | f48ef03 | 2010-03-14 03:48:46 +0000 | [diff] [blame^] | 1141 | case X86::TCRETURNmi: |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 1142 | case X86::TCRETURNdi64: |
Evan Cheng | f48ef03 | 2010-03-14 03:48:46 +0000 | [diff] [blame^] | 1143 | case X86::TCRETURNri64: |
| 1144 | case X86::TCRETURNmi64: |
Anton Korobeynikov | 2365f51 | 2007-07-14 14:06:15 +0000 | [diff] [blame] | 1145 | case X86::EH_RETURN: |
Anton Korobeynikov | b84c167 | 2008-09-08 21:12:47 +0000 | [diff] [blame] | 1146 | case X86::EH_RETURN64: |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 1147 | break; // These are ok |
Chris Lattner | 2b3d56e | 2005-05-14 23:35:21 +0000 | [diff] [blame] | 1148 | } |
Misha Brukman | 2adb395 | 2002-12-04 23:57:03 +0000 | [diff] [blame] | 1149 | |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 1150 | // Get the number of bytes to allocate from the FrameInfo. |
Evan Cheng | 89d1659 | 2007-07-17 07:59:08 +0000 | [diff] [blame] | 1151 | uint64_t StackSize = MFI->getStackSize(); |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 1152 | uint64_t MaxAlign = MFI->getMaxAlignment(); |
Evan Cheng | 89d1659 | 2007-07-17 07:59:08 +0000 | [diff] [blame] | 1153 | unsigned CSSize = X86FI->getCalleeSavedFrameSize(); |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 1154 | uint64_t NumBytes = 0; |
Evan Cheng | 89d1659 | 2007-07-17 07:59:08 +0000 | [diff] [blame] | 1155 | |
Chris Lattner | 3c1c03d | 2002-12-28 20:32:28 +0000 | [diff] [blame] | 1156 | if (hasFP(MF)) { |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 1157 | // Calculate required stack adjustment. |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 1158 | uint64_t FrameSize = StackSize - SlotSize; |
| 1159 | if (needsStackRealignment(MF)) |
| 1160 | FrameSize = (FrameSize + MaxAlign - 1)/MaxAlign*MaxAlign; |
| 1161 | |
| 1162 | NumBytes = FrameSize - CSSize; |
| 1163 | |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 1164 | // Pop EBP. |
Bill Wendling | 3d2445f | 2009-02-21 00:43:56 +0000 | [diff] [blame] | 1165 | BuildMI(MBB, MBBI, DL, |
Dale Johannesen | 21b5541 | 2009-02-12 23:08:38 +0000 | [diff] [blame] | 1166 | TII.get(Is64Bit ? X86::POP64r : X86::POP32r), FramePtr); |
Bill Wendling | 2625f9b | 2009-02-21 00:32:08 +0000 | [diff] [blame] | 1167 | } else { |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 1168 | NumBytes = StackSize - CSSize; |
Bill Wendling | 2625f9b | 2009-02-21 00:32:08 +0000 | [diff] [blame] | 1169 | } |
Anton Korobeynikov | 2365f51 | 2007-07-14 14:06:15 +0000 | [diff] [blame] | 1170 | |
Evan Cheng | f27795d | 2007-07-17 18:03:34 +0000 | [diff] [blame] | 1171 | // Skip the callee-saved pop instructions. |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 1172 | MachineBasicBlock::iterator LastCSPop = MBBI; |
Evan Cheng | f27795d | 2007-07-17 18:03:34 +0000 | [diff] [blame] | 1173 | while (MBBI != MBB.begin()) { |
Evan Cheng | fcc8793 | 2007-07-26 17:45:41 +0000 | [diff] [blame] | 1174 | MachineBasicBlock::iterator PI = prior(MBBI); |
| 1175 | unsigned Opc = PI->getOpcode(); |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 1176 | |
Bill Wendling | f7c0940 | 2008-10-31 18:30:19 +0000 | [diff] [blame] | 1177 | if (Opc != X86::POP32r && Opc != X86::POP64r && |
| 1178 | !PI->getDesc().isTerminator()) |
Evan Cheng | f27795d | 2007-07-17 18:03:34 +0000 | [diff] [blame] | 1179 | break; |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 1180 | |
Evan Cheng | f27795d | 2007-07-17 18:03:34 +0000 | [diff] [blame] | 1181 | --MBBI; |
| 1182 | } |
| 1183 | |
Bill Wendling | 3d2445f | 2009-02-21 00:43:56 +0000 | [diff] [blame] | 1184 | DL = MBBI->getDebugLoc(); |
| 1185 | |
Anton Korobeynikov | 4f1c33f | 2007-10-06 16:17:49 +0000 | [diff] [blame] | 1186 | // If there is an ADD32ri or SUB32ri of ESP immediately before this |
| 1187 | // instruction, merge the two instructions. |
| 1188 | if (NumBytes || MFI->hasVarSizedObjects()) |
| 1189 | mergeSPUpdatesUp(MBB, MBBI, StackPtr, &NumBytes); |
Evan Cheng | 5b3332c | 2007-07-17 18:40:47 +0000 | [diff] [blame] | 1190 | |
Anton Korobeynikov | 4f1c33f | 2007-10-06 16:17:49 +0000 | [diff] [blame] | 1191 | // If dynamic alloca is used, then reset esp to point to the last callee-saved |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 1192 | // slot before popping them off! Same applies for the case, when stack was |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 1193 | // realigned. |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 1194 | if (needsStackRealignment(MF)) { |
| 1195 | // We cannot use LEA here, because stack pointer was realigned. We need to |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 1196 | // deallocate local frame back. |
Evan Cheng | 3c46eef | 2007-07-18 21:26:06 +0000 | [diff] [blame] | 1197 | if (CSSize) { |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 1198 | emitSPUpdate(MBB, MBBI, StackPtr, NumBytes, Is64Bit, TII); |
| 1199 | MBBI = prior(LastCSPop); |
| 1200 | } |
| 1201 | |
Dale Johannesen | 21b5541 | 2009-02-12 23:08:38 +0000 | [diff] [blame] | 1202 | BuildMI(MBB, MBBI, DL, |
Anton Korobeynikov | 2c430cb | 2008-04-23 18:21:27 +0000 | [diff] [blame] | 1203 | TII.get(Is64Bit ? X86::MOV64rr : X86::MOV32rr), |
| 1204 | StackPtr).addReg(FramePtr); |
| 1205 | } else if (MFI->hasVarSizedObjects()) { |
| 1206 | if (CSSize) { |
| 1207 | unsigned Opc = Is64Bit ? X86::LEA64r : X86::LEA32r; |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 1208 | MachineInstr *MI = |
| 1209 | addLeaRegOffset(BuildMI(MF, DL, TII.get(Opc), StackPtr), |
| 1210 | FramePtr, false, -CSSize); |
Evan Cheng | 3c46eef | 2007-07-18 21:26:06 +0000 | [diff] [blame] | 1211 | MBB.insert(MBBI, MI); |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 1212 | } else { |
| 1213 | BuildMI(MBB, MBBI, DL, |
| 1214 | TII.get(Is64Bit ? X86::MOV64rr : X86::MOV32rr), StackPtr) |
| 1215 | .addReg(FramePtr); |
| 1216 | } |
| 1217 | } else if (NumBytes) { |
| 1218 | // Adjust stack pointer back: ESP += numbytes. |
| 1219 | emitSPUpdate(MBB, MBBI, StackPtr, NumBytes, Is64Bit, TII); |
Evan Cheng | 3c46eef | 2007-07-18 21:26:06 +0000 | [diff] [blame] | 1220 | } |
| 1221 | |
Evan Cheng | 5b3332c | 2007-07-17 18:40:47 +0000 | [diff] [blame] | 1222 | // We're returning from function via eh_return. |
Anton Korobeynikov | b84c167 | 2008-09-08 21:12:47 +0000 | [diff] [blame] | 1223 | if (RetOpcode == X86::EH_RETURN || RetOpcode == X86::EH_RETURN64) { |
Evan Cheng | 5b3332c | 2007-07-17 18:40:47 +0000 | [diff] [blame] | 1224 | MBBI = prior(MBB.end()); |
| 1225 | MachineOperand &DestAddr = MBBI->getOperand(0); |
Dan Gohman | d735b80 | 2008-10-03 15:45:36 +0000 | [diff] [blame] | 1226 | assert(DestAddr.isReg() && "Offset should be in register!"); |
Dale Johannesen | 21b5541 | 2009-02-12 23:08:38 +0000 | [diff] [blame] | 1227 | BuildMI(MBB, MBBI, DL, |
Anton Korobeynikov | b84c167 | 2008-09-08 21:12:47 +0000 | [diff] [blame] | 1228 | TII.get(Is64Bit ? X86::MOV64rr : X86::MOV32rr), |
| 1229 | StackPtr).addReg(DestAddr.getReg()); |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 1230 | } else if (RetOpcode == X86::TCRETURNri || RetOpcode == X86::TCRETURNdi || |
Evan Cheng | f48ef03 | 2010-03-14 03:48:46 +0000 | [diff] [blame^] | 1231 | RetOpcode == X86::TCRETURNmi || |
| 1232 | RetOpcode == X86::TCRETURNri64 || RetOpcode == X86::TCRETURNdi64 || |
| 1233 | RetOpcode == X86::TCRETURNmi64) { |
| 1234 | bool isMem = RetOpcode == X86::TCRETURNmi || RetOpcode == X86::TCRETURNmi64; |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 1235 | // Tail call return: adjust the stack pointer and jump to callee. |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 1236 | MBBI = prior(MBB.end()); |
| 1237 | MachineOperand &JumpTarget = MBBI->getOperand(0); |
Evan Cheng | f48ef03 | 2010-03-14 03:48:46 +0000 | [diff] [blame^] | 1238 | MachineOperand &StackAdjust = MBBI->getOperand(isMem ? 5 : 1); |
Dan Gohman | d735b80 | 2008-10-03 15:45:36 +0000 | [diff] [blame] | 1239 | assert(StackAdjust.isImm() && "Expecting immediate value."); |
Anton Korobeynikov | e201190 | 2008-04-23 18:15:11 +0000 | [diff] [blame] | 1240 | |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 1241 | // Adjust stack pointer. |
| 1242 | int StackAdj = StackAdjust.getImm(); |
| 1243 | int MaxTCDelta = X86FI->getTCReturnAddrDelta(); |
| 1244 | int Offset = 0; |
| 1245 | assert(MaxTCDelta <= 0 && "MaxTCDelta should never be positive"); |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 1246 | |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 1247 | // Incoporate the retaddr area. |
| 1248 | Offset = StackAdj-MaxTCDelta; |
| 1249 | assert(Offset >= 0 && "Offset should never be negative"); |
Bill Wendling | 3d2445f | 2009-02-21 00:43:56 +0000 | [diff] [blame] | 1250 | |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 1251 | if (Offset) { |
| 1252 | // Check for possible merge with preceeding ADD instruction. |
| 1253 | Offset += mergeSPUpdates(MBB, MBBI, StackPtr, true); |
| 1254 | emitSPUpdate(MBB, MBBI, StackPtr, Offset, Is64Bit, TII); |
Anton Korobeynikov | e201190 | 2008-04-23 18:15:11 +0000 | [diff] [blame] | 1255 | } |
Bill Wendling | 3d2445f | 2009-02-21 00:43:56 +0000 | [diff] [blame] | 1256 | |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 1257 | // Jump to label or value in register. |
Evan Cheng | f48ef03 | 2010-03-14 03:48:46 +0000 | [diff] [blame^] | 1258 | if (RetOpcode == X86::TCRETURNdi || RetOpcode == X86::TCRETURNdi64) { |
| 1259 | BuildMI(MBB, MBBI, DL, TII.get((RetOpcode == X86::TCRETURNdi) |
| 1260 | ? X86::TAILJMPd : X86::TAILJMPd64)). |
Evan Cheng | 1d885c0 | 2010-01-30 01:16:15 +0000 | [diff] [blame] | 1261 | addGlobalAddress(JumpTarget.getGlobal(), JumpTarget.getOffset(), |
| 1262 | JumpTarget.getTargetFlags()); |
Evan Cheng | f48ef03 | 2010-03-14 03:48:46 +0000 | [diff] [blame^] | 1263 | } else if (RetOpcode == X86::TCRETURNmi || RetOpcode == X86::TCRETURNmi64) { |
| 1264 | MachineInstrBuilder MIB = |
| 1265 | BuildMI(MBB, MBBI, DL, TII.get((RetOpcode == X86::TCRETURNmi) |
| 1266 | ? X86::TAILJMPm : X86::TAILJMPm64)); |
| 1267 | for (unsigned i = 0; i != 5; ++i) |
| 1268 | MIB.addOperand(MBBI->getOperand(i)); |
Evan Cheng | aa92bec | 2010-01-31 07:28:44 +0000 | [diff] [blame] | 1269 | } else if (RetOpcode == X86::TCRETURNri64) { |
Dale Johannesen | 21b5541 | 2009-02-12 23:08:38 +0000 | [diff] [blame] | 1270 | BuildMI(MBB, MBBI, DL, TII.get(X86::TAILJMPr64), JumpTarget.getReg()); |
Evan Cheng | aa92bec | 2010-01-31 07:28:44 +0000 | [diff] [blame] | 1271 | } else { |
Dan Gohman | 39a1fab | 2009-11-30 23:33:53 +0000 | [diff] [blame] | 1272 | BuildMI(MBB, MBBI, DL, TII.get(X86::TAILJMPr), JumpTarget.getReg()); |
Evan Cheng | aa92bec | 2010-01-31 07:28:44 +0000 | [diff] [blame] | 1273 | } |
| 1274 | |
| 1275 | MachineInstr *NewMI = prior(MBBI); |
| 1276 | for (unsigned i = 2, e = MBBI->getNumOperands(); i != e; ++i) |
| 1277 | NewMI->addOperand(MBBI->getOperand(i)); |
Bill Wendling | 3d2445f | 2009-02-21 00:43:56 +0000 | [diff] [blame] | 1278 | |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 1279 | // Delete the pseudo instruction TCRETURN. |
| 1280 | MBB.erase(MBBI); |
Anton Korobeynikov | e201190 | 2008-04-23 18:15:11 +0000 | [diff] [blame] | 1281 | } else if ((RetOpcode == X86::RET || RetOpcode == X86::RETI) && |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 1282 | (X86FI->getTCReturnAddrDelta() < 0)) { |
| 1283 | // Add the return addr area delta back since we are not tail calling. |
| 1284 | int delta = -1*X86FI->getTCReturnAddrDelta(); |
| 1285 | MBBI = prior(MBB.end()); |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 1286 | |
Arnold Schwaighofer | c85e171 | 2007-10-11 19:40:01 +0000 | [diff] [blame] | 1287 | // Check for possible merge with preceeding ADD instruction. |
| 1288 | delta += mergeSPUpdates(MBB, MBBI, StackPtr, true); |
| 1289 | emitSPUpdate(MBB, MBBI, StackPtr, delta, Is64Bit, TII); |
Evan Cheng | 5b3332c | 2007-07-17 18:40:47 +0000 | [diff] [blame] | 1290 | } |
Chris Lattner | 3c1c03d | 2002-12-28 20:32:28 +0000 | [diff] [blame] | 1291 | } |
| 1292 | |
Jim Laskey | 4188699 | 2006-04-07 16:34:46 +0000 | [diff] [blame] | 1293 | unsigned X86RegisterInfo::getRARegister() const { |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 1294 | return Is64Bit ? X86::RIP // Should have dwarf #16. |
| 1295 | : X86::EIP; // Should have dwarf #8. |
Jim Laskey | 4188699 | 2006-04-07 16:34:46 +0000 | [diff] [blame] | 1296 | } |
| 1297 | |
David Greene | 3f2bf85 | 2009-11-12 20:49:22 +0000 | [diff] [blame] | 1298 | unsigned X86RegisterInfo::getFrameRegister(const MachineFunction &MF) const { |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1299 | return hasFP(MF) ? FramePtr : StackPtr; |
Jim Laskey | f1d78e8 | 2006-03-23 18:12:57 +0000 | [diff] [blame] | 1300 | } |
| 1301 | |
Bill Wendling | 80c7643 | 2009-08-16 11:00:26 +0000 | [diff] [blame] | 1302 | void |
| 1303 | X86RegisterInfo::getInitialFrameState(std::vector<MachineMove> &Moves) const { |
Anton Korobeynikov | 0ff3ca4 | 2007-05-12 22:36:25 +0000 | [diff] [blame] | 1304 | // Calculate amount of bytes used for return address storing |
| 1305 | int stackGrowth = (Is64Bit ? -8 : -4); |
| 1306 | |
| 1307 | // Initial state of the frame pointer is esp+4. |
Jim Laskey | 0e41094 | 2007-01-24 19:15:24 +0000 | [diff] [blame] | 1308 | MachineLocation Dst(MachineLocation::VirtualFP); |
Anton Korobeynikov | 0ff3ca4 | 2007-05-12 22:36:25 +0000 | [diff] [blame] | 1309 | MachineLocation Src(StackPtr, stackGrowth); |
Jim Laskey | 0e41094 | 2007-01-24 19:15:24 +0000 | [diff] [blame] | 1310 | Moves.push_back(MachineMove(0, Dst, Src)); |
Anton Korobeynikov | 0ff3ca4 | 2007-05-12 22:36:25 +0000 | [diff] [blame] | 1311 | |
| 1312 | // Add return address to move list |
| 1313 | MachineLocation CSDst(StackPtr, stackGrowth); |
| 1314 | MachineLocation CSSrc(getRARegister()); |
| 1315 | Moves.push_back(MachineMove(0, CSDst, CSSrc)); |
Jim Laskey | 0e41094 | 2007-01-24 19:15:24 +0000 | [diff] [blame] | 1316 | } |
| 1317 | |
Jim Laskey | 62819f3 | 2007-02-21 22:54:50 +0000 | [diff] [blame] | 1318 | unsigned X86RegisterInfo::getEHExceptionRegister() const { |
Torok Edwin | c23197a | 2009-07-14 16:55:14 +0000 | [diff] [blame] | 1319 | llvm_unreachable("What is the exception register"); |
Jim Laskey | 62819f3 | 2007-02-21 22:54:50 +0000 | [diff] [blame] | 1320 | return 0; |
| 1321 | } |
| 1322 | |
| 1323 | unsigned X86RegisterInfo::getEHHandlerRegister() const { |
Torok Edwin | c23197a | 2009-07-14 16:55:14 +0000 | [diff] [blame] | 1324 | llvm_unreachable("What is the exception handler register"); |
Jim Laskey | 62819f3 | 2007-02-21 22:54:50 +0000 | [diff] [blame] | 1325 | return 0; |
| 1326 | } |
| 1327 | |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1328 | namespace llvm { |
Owen Anderson | e50ed30 | 2009-08-10 22:56:29 +0000 | [diff] [blame] | 1329 | unsigned getX86SubSuperRegister(unsigned Reg, EVT VT, bool High) { |
Owen Anderson | 825b72b | 2009-08-11 20:47:22 +0000 | [diff] [blame] | 1330 | switch (VT.getSimpleVT().SimpleTy) { |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1331 | default: return Reg; |
Owen Anderson | 825b72b | 2009-08-11 20:47:22 +0000 | [diff] [blame] | 1332 | case MVT::i8: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1333 | if (High) { |
| 1334 | switch (Reg) { |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1335 | default: return 0; |
| 1336 | case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1337 | return X86::AH; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1338 | case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1339 | return X86::DH; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1340 | case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1341 | return X86::CH; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1342 | case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1343 | return X86::BH; |
| 1344 | } |
| 1345 | } else { |
| 1346 | switch (Reg) { |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1347 | default: return 0; |
| 1348 | case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1349 | return X86::AL; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1350 | case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1351 | return X86::DL; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1352 | case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1353 | return X86::CL; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1354 | case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1355 | return X86::BL; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1356 | case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI: |
| 1357 | return X86::SIL; |
| 1358 | case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI: |
| 1359 | return X86::DIL; |
| 1360 | case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP: |
| 1361 | return X86::BPL; |
| 1362 | case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP: |
| 1363 | return X86::SPL; |
| 1364 | case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8: |
| 1365 | return X86::R8B; |
| 1366 | case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9: |
| 1367 | return X86::R9B; |
| 1368 | case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10: |
| 1369 | return X86::R10B; |
| 1370 | case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11: |
| 1371 | return X86::R11B; |
| 1372 | case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12: |
| 1373 | return X86::R12B; |
| 1374 | case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13: |
| 1375 | return X86::R13B; |
| 1376 | case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14: |
| 1377 | return X86::R14B; |
| 1378 | case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15: |
| 1379 | return X86::R15B; |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1380 | } |
| 1381 | } |
Owen Anderson | 825b72b | 2009-08-11 20:47:22 +0000 | [diff] [blame] | 1382 | case MVT::i16: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1383 | switch (Reg) { |
| 1384 | default: return Reg; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1385 | case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1386 | return X86::AX; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1387 | case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1388 | return X86::DX; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1389 | case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1390 | return X86::CX; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1391 | case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1392 | return X86::BX; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1393 | case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1394 | return X86::SI; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1395 | case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1396 | return X86::DI; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1397 | case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1398 | return X86::BP; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1399 | case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1400 | return X86::SP; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1401 | case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8: |
| 1402 | return X86::R8W; |
| 1403 | case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9: |
| 1404 | return X86::R9W; |
| 1405 | case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10: |
| 1406 | return X86::R10W; |
| 1407 | case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11: |
| 1408 | return X86::R11W; |
| 1409 | case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12: |
| 1410 | return X86::R12W; |
| 1411 | case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13: |
| 1412 | return X86::R13W; |
| 1413 | case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14: |
| 1414 | return X86::R14W; |
| 1415 | case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15: |
| 1416 | return X86::R15W; |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1417 | } |
Owen Anderson | 825b72b | 2009-08-11 20:47:22 +0000 | [diff] [blame] | 1418 | case MVT::i32: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1419 | switch (Reg) { |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1420 | default: return Reg; |
| 1421 | case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1422 | return X86::EAX; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1423 | case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1424 | return X86::EDX; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1425 | case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1426 | return X86::ECX; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1427 | case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1428 | return X86::EBX; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1429 | case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1430 | return X86::ESI; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1431 | case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1432 | return X86::EDI; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1433 | case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1434 | return X86::EBP; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1435 | case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP: |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1436 | return X86::ESP; |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1437 | case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8: |
| 1438 | return X86::R8D; |
| 1439 | case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9: |
| 1440 | return X86::R9D; |
| 1441 | case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10: |
| 1442 | return X86::R10D; |
| 1443 | case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11: |
| 1444 | return X86::R11D; |
| 1445 | case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12: |
| 1446 | return X86::R12D; |
| 1447 | case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13: |
| 1448 | return X86::R13D; |
| 1449 | case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14: |
| 1450 | return X86::R14D; |
| 1451 | case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15: |
| 1452 | return X86::R15D; |
| 1453 | } |
Owen Anderson | 825b72b | 2009-08-11 20:47:22 +0000 | [diff] [blame] | 1454 | case MVT::i64: |
Evan Cheng | 25ab690 | 2006-09-08 06:48:29 +0000 | [diff] [blame] | 1455 | switch (Reg) { |
| 1456 | default: return Reg; |
| 1457 | case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX: |
| 1458 | return X86::RAX; |
| 1459 | case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX: |
| 1460 | return X86::RDX; |
| 1461 | case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX: |
| 1462 | return X86::RCX; |
| 1463 | case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX: |
| 1464 | return X86::RBX; |
| 1465 | case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI: |
| 1466 | return X86::RSI; |
| 1467 | case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI: |
| 1468 | return X86::RDI; |
| 1469 | case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP: |
| 1470 | return X86::RBP; |
| 1471 | case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP: |
| 1472 | return X86::RSP; |
| 1473 | case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8: |
| 1474 | return X86::R8; |
| 1475 | case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9: |
| 1476 | return X86::R9; |
| 1477 | case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10: |
| 1478 | return X86::R10; |
| 1479 | case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11: |
| 1480 | return X86::R11; |
| 1481 | case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12: |
| 1482 | return X86::R12; |
| 1483 | case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13: |
| 1484 | return X86::R13; |
| 1485 | case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14: |
| 1486 | return X86::R14; |
| 1487 | case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15: |
| 1488 | return X86::R15; |
Evan Cheng | 8f7f712 | 2006-05-05 05:40:20 +0000 | [diff] [blame] | 1489 | } |
| 1490 | } |
| 1491 | |
| 1492 | return Reg; |
| 1493 | } |
| 1494 | } |
| 1495 | |
Chris Lattner | 7ad3e06 | 2003-08-03 15:48:14 +0000 | [diff] [blame] | 1496 | #include "X86GenRegisterInfo.inc" |