David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 1 | //===- ARMBaseInstrInfo.cpp - ARM Instruction Information -----------*- C++ -*-===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file contains the Base ARM implementation of the TargetInstrInfo class. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "ARMBaseInstrInfo.h" |
| 15 | #include "ARM.h" |
| 16 | #include "ARMAddressingModes.h" |
| 17 | #include "ARMGenInstrInfo.inc" |
| 18 | #include "ARMMachineFunctionInfo.h" |
Anton Korobeynikov | f95215f | 2009-11-02 00:10:38 +0000 | [diff] [blame] | 19 | #include "ARMRegisterInfo.h" |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 20 | #include "llvm/ADT/STLExtras.h" |
| 21 | #include "llvm/CodeGen/LiveVariables.h" |
| 22 | #include "llvm/CodeGen/MachineFrameInfo.h" |
| 23 | #include "llvm/CodeGen/MachineInstrBuilder.h" |
| 24 | #include "llvm/CodeGen/MachineJumpTableInfo.h" |
Anton Korobeynikov | 249fb33 | 2009-10-07 00:06:35 +0000 | [diff] [blame] | 25 | #include "llvm/CodeGen/MachineMemOperand.h" |
| 26 | #include "llvm/CodeGen/PseudoSourceValue.h" |
Chris Lattner | af76e59 | 2009-08-22 20:48:53 +0000 | [diff] [blame] | 27 | #include "llvm/MC/MCAsmInfo.h" |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 28 | #include "llvm/Support/CommandLine.h" |
Anton Korobeynikov | f95215f | 2009-11-02 00:10:38 +0000 | [diff] [blame] | 29 | #include "llvm/Support/Debug.h" |
Torok Edwin | c25e758 | 2009-07-11 20:10:48 +0000 | [diff] [blame] | 30 | #include "llvm/Support/ErrorHandling.h" |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 31 | using namespace llvm; |
| 32 | |
| 33 | static cl::opt<bool> |
| 34 | EnableARM3Addr("enable-arm-3-addr-conv", cl::Hidden, |
| 35 | cl::desc("Enable ARM 2-addr to 3-addr conv")); |
| 36 | |
Anton Korobeynikov | f95215f | 2009-11-02 00:10:38 +0000 | [diff] [blame] | 37 | ARMBaseInstrInfo::ARMBaseInstrInfo(const ARMSubtarget& STI) |
| 38 | : TargetInstrInfoImpl(ARMInsts, array_lengthof(ARMInsts)), |
| 39 | Subtarget(STI) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 40 | } |
| 41 | |
| 42 | MachineInstr * |
| 43 | ARMBaseInstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI, |
| 44 | MachineBasicBlock::iterator &MBBI, |
| 45 | LiveVariables *LV) const { |
Evan Cheng | 78703dd | 2009-07-27 18:44:00 +0000 | [diff] [blame] | 46 | // FIXME: Thumb2 support. |
| 47 | |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 48 | if (!EnableARM3Addr) |
| 49 | return NULL; |
| 50 | |
| 51 | MachineInstr *MI = MBBI; |
| 52 | MachineFunction &MF = *MI->getParent()->getParent(); |
| 53 | unsigned TSFlags = MI->getDesc().TSFlags; |
| 54 | bool isPre = false; |
| 55 | switch ((TSFlags & ARMII::IndexModeMask) >> ARMII::IndexModeShift) { |
| 56 | default: return NULL; |
| 57 | case ARMII::IndexModePre: |
| 58 | isPre = true; |
| 59 | break; |
| 60 | case ARMII::IndexModePost: |
| 61 | break; |
| 62 | } |
| 63 | |
| 64 | // Try splitting an indexed load/store to an un-indexed one plus an add/sub |
| 65 | // operation. |
| 66 | unsigned MemOpc = getUnindexedOpcode(MI->getOpcode()); |
| 67 | if (MemOpc == 0) |
| 68 | return NULL; |
| 69 | |
| 70 | MachineInstr *UpdateMI = NULL; |
| 71 | MachineInstr *MemMI = NULL; |
| 72 | unsigned AddrMode = (TSFlags & ARMII::AddrModeMask); |
| 73 | const TargetInstrDesc &TID = MI->getDesc(); |
| 74 | unsigned NumOps = TID.getNumOperands(); |
| 75 | bool isLoad = !TID.mayStore(); |
| 76 | const MachineOperand &WB = isLoad ? MI->getOperand(1) : MI->getOperand(0); |
| 77 | const MachineOperand &Base = MI->getOperand(2); |
| 78 | const MachineOperand &Offset = MI->getOperand(NumOps-3); |
| 79 | unsigned WBReg = WB.getReg(); |
| 80 | unsigned BaseReg = Base.getReg(); |
| 81 | unsigned OffReg = Offset.getReg(); |
| 82 | unsigned OffImm = MI->getOperand(NumOps-2).getImm(); |
| 83 | ARMCC::CondCodes Pred = (ARMCC::CondCodes)MI->getOperand(NumOps-1).getImm(); |
| 84 | switch (AddrMode) { |
| 85 | default: |
| 86 | assert(false && "Unknown indexed op!"); |
| 87 | return NULL; |
| 88 | case ARMII::AddrMode2: { |
| 89 | bool isSub = ARM_AM::getAM2Op(OffImm) == ARM_AM::sub; |
| 90 | unsigned Amt = ARM_AM::getAM2Offset(OffImm); |
| 91 | if (OffReg == 0) { |
Evan Cheng | e7cbe41 | 2009-07-08 21:03:57 +0000 | [diff] [blame] | 92 | if (ARM_AM::getSOImmVal(Amt) == -1) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 93 | // Can't encode it in a so_imm operand. This transformation will |
| 94 | // add more than 1 instruction. Abandon! |
| 95 | return NULL; |
| 96 | UpdateMI = BuildMI(MF, MI->getDebugLoc(), |
Evan Cheng | 78703dd | 2009-07-27 18:44:00 +0000 | [diff] [blame] | 97 | get(isSub ? ARM::SUBri : ARM::ADDri), WBReg) |
Evan Cheng | e7cbe41 | 2009-07-08 21:03:57 +0000 | [diff] [blame] | 98 | .addReg(BaseReg).addImm(Amt) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 99 | .addImm(Pred).addReg(0).addReg(0); |
| 100 | } else if (Amt != 0) { |
| 101 | ARM_AM::ShiftOpc ShOpc = ARM_AM::getAM2ShiftOpc(OffImm); |
| 102 | unsigned SOOpc = ARM_AM::getSORegOpc(ShOpc, Amt); |
| 103 | UpdateMI = BuildMI(MF, MI->getDebugLoc(), |
Evan Cheng | 78703dd | 2009-07-27 18:44:00 +0000 | [diff] [blame] | 104 | get(isSub ? ARM::SUBrs : ARM::ADDrs), WBReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 105 | .addReg(BaseReg).addReg(OffReg).addReg(0).addImm(SOOpc) |
| 106 | .addImm(Pred).addReg(0).addReg(0); |
| 107 | } else |
| 108 | UpdateMI = BuildMI(MF, MI->getDebugLoc(), |
Evan Cheng | 78703dd | 2009-07-27 18:44:00 +0000 | [diff] [blame] | 109 | get(isSub ? ARM::SUBrr : ARM::ADDrr), WBReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 110 | .addReg(BaseReg).addReg(OffReg) |
| 111 | .addImm(Pred).addReg(0).addReg(0); |
| 112 | break; |
| 113 | } |
| 114 | case ARMII::AddrMode3 : { |
| 115 | bool isSub = ARM_AM::getAM3Op(OffImm) == ARM_AM::sub; |
| 116 | unsigned Amt = ARM_AM::getAM3Offset(OffImm); |
| 117 | if (OffReg == 0) |
| 118 | // Immediate is 8-bits. It's guaranteed to fit in a so_imm operand. |
| 119 | UpdateMI = BuildMI(MF, MI->getDebugLoc(), |
Evan Cheng | 78703dd | 2009-07-27 18:44:00 +0000 | [diff] [blame] | 120 | get(isSub ? ARM::SUBri : ARM::ADDri), WBReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 121 | .addReg(BaseReg).addImm(Amt) |
| 122 | .addImm(Pred).addReg(0).addReg(0); |
| 123 | else |
| 124 | UpdateMI = BuildMI(MF, MI->getDebugLoc(), |
Evan Cheng | 78703dd | 2009-07-27 18:44:00 +0000 | [diff] [blame] | 125 | get(isSub ? ARM::SUBrr : ARM::ADDrr), WBReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 126 | .addReg(BaseReg).addReg(OffReg) |
| 127 | .addImm(Pred).addReg(0).addReg(0); |
| 128 | break; |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | std::vector<MachineInstr*> NewMIs; |
| 133 | if (isPre) { |
| 134 | if (isLoad) |
| 135 | MemMI = BuildMI(MF, MI->getDebugLoc(), |
| 136 | get(MemOpc), MI->getOperand(0).getReg()) |
| 137 | .addReg(WBReg).addReg(0).addImm(0).addImm(Pred); |
| 138 | else |
| 139 | MemMI = BuildMI(MF, MI->getDebugLoc(), |
| 140 | get(MemOpc)).addReg(MI->getOperand(1).getReg()) |
| 141 | .addReg(WBReg).addReg(0).addImm(0).addImm(Pred); |
| 142 | NewMIs.push_back(MemMI); |
| 143 | NewMIs.push_back(UpdateMI); |
| 144 | } else { |
| 145 | if (isLoad) |
| 146 | MemMI = BuildMI(MF, MI->getDebugLoc(), |
| 147 | get(MemOpc), MI->getOperand(0).getReg()) |
| 148 | .addReg(BaseReg).addReg(0).addImm(0).addImm(Pred); |
| 149 | else |
| 150 | MemMI = BuildMI(MF, MI->getDebugLoc(), |
| 151 | get(MemOpc)).addReg(MI->getOperand(1).getReg()) |
| 152 | .addReg(BaseReg).addReg(0).addImm(0).addImm(Pred); |
| 153 | if (WB.isDead()) |
| 154 | UpdateMI->getOperand(0).setIsDead(); |
| 155 | NewMIs.push_back(UpdateMI); |
| 156 | NewMIs.push_back(MemMI); |
| 157 | } |
| 158 | |
| 159 | // Transfer LiveVariables states, kill / dead info. |
| 160 | if (LV) { |
| 161 | for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) { |
| 162 | MachineOperand &MO = MI->getOperand(i); |
| 163 | if (MO.isReg() && MO.getReg() && |
| 164 | TargetRegisterInfo::isVirtualRegister(MO.getReg())) { |
| 165 | unsigned Reg = MO.getReg(); |
| 166 | |
| 167 | LiveVariables::VarInfo &VI = LV->getVarInfo(Reg); |
| 168 | if (MO.isDef()) { |
| 169 | MachineInstr *NewMI = (Reg == WBReg) ? UpdateMI : MemMI; |
| 170 | if (MO.isDead()) |
| 171 | LV->addVirtualRegisterDead(Reg, NewMI); |
| 172 | } |
| 173 | if (MO.isUse() && MO.isKill()) { |
| 174 | for (unsigned j = 0; j < 2; ++j) { |
| 175 | // Look at the two new MI's in reverse order. |
| 176 | MachineInstr *NewMI = NewMIs[j]; |
| 177 | if (!NewMI->readsRegister(Reg)) |
| 178 | continue; |
| 179 | LV->addVirtualRegisterKilled(Reg, NewMI); |
| 180 | if (VI.removeKill(MI)) |
| 181 | VI.Kills.push_back(NewMI); |
| 182 | break; |
| 183 | } |
| 184 | } |
| 185 | } |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | MFI->insert(MBBI, NewMIs[1]); |
| 190 | MFI->insert(MBBI, NewMIs[0]); |
| 191 | return NewMIs[0]; |
| 192 | } |
| 193 | |
| 194 | // Branch analysis. |
| 195 | bool |
| 196 | ARMBaseInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TBB, |
| 197 | MachineBasicBlock *&FBB, |
| 198 | SmallVectorImpl<MachineOperand> &Cond, |
| 199 | bool AllowModify) const { |
| 200 | // If the block has no terminators, it just falls into the block after it. |
| 201 | MachineBasicBlock::iterator I = MBB.end(); |
| 202 | if (I == MBB.begin() || !isUnpredicatedTerminator(--I)) |
| 203 | return false; |
| 204 | |
| 205 | // Get the last instruction in the block. |
| 206 | MachineInstr *LastInst = I; |
| 207 | |
| 208 | // If there is only one terminator instruction, process it. |
| 209 | unsigned LastOpc = LastInst->getOpcode(); |
| 210 | if (I == MBB.begin() || !isUnpredicatedTerminator(--I)) { |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 211 | if (isUncondBranchOpcode(LastOpc)) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 212 | TBB = LastInst->getOperand(0).getMBB(); |
| 213 | return false; |
| 214 | } |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 215 | if (isCondBranchOpcode(LastOpc)) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 216 | // Block ends with fall-through condbranch. |
| 217 | TBB = LastInst->getOperand(0).getMBB(); |
| 218 | Cond.push_back(LastInst->getOperand(1)); |
| 219 | Cond.push_back(LastInst->getOperand(2)); |
| 220 | return false; |
| 221 | } |
| 222 | return true; // Can't handle indirect branch. |
| 223 | } |
| 224 | |
| 225 | // Get the instruction before it if it is a terminator. |
| 226 | MachineInstr *SecondLastInst = I; |
| 227 | |
| 228 | // If there are three terminators, we don't know what sort of block this is. |
| 229 | if (SecondLastInst && I != MBB.begin() && isUnpredicatedTerminator(--I)) |
| 230 | return true; |
| 231 | |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 232 | // If the block ends with a B and a Bcc, handle it. |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 233 | unsigned SecondLastOpc = SecondLastInst->getOpcode(); |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 234 | if (isCondBranchOpcode(SecondLastOpc) && isUncondBranchOpcode(LastOpc)) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 235 | TBB = SecondLastInst->getOperand(0).getMBB(); |
| 236 | Cond.push_back(SecondLastInst->getOperand(1)); |
| 237 | Cond.push_back(SecondLastInst->getOperand(2)); |
| 238 | FBB = LastInst->getOperand(0).getMBB(); |
| 239 | return false; |
| 240 | } |
| 241 | |
| 242 | // If the block ends with two unconditional branches, handle it. The second |
| 243 | // one is not executed, so remove it. |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 244 | if (isUncondBranchOpcode(SecondLastOpc) && isUncondBranchOpcode(LastOpc)) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 245 | TBB = SecondLastInst->getOperand(0).getMBB(); |
| 246 | I = LastInst; |
| 247 | if (AllowModify) |
| 248 | I->eraseFromParent(); |
| 249 | return false; |
| 250 | } |
| 251 | |
| 252 | // ...likewise if it ends with a branch table followed by an unconditional |
| 253 | // branch. The branch folder can create these, and we must get rid of them for |
| 254 | // correctness of Thumb constant islands. |
Bob Wilson | 8d4de5a | 2009-10-28 18:26:41 +0000 | [diff] [blame] | 255 | if ((isJumpTableBranchOpcode(SecondLastOpc) || |
| 256 | isIndirectBranchOpcode(SecondLastOpc)) && |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 257 | isUncondBranchOpcode(LastOpc)) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 258 | I = LastInst; |
| 259 | if (AllowModify) |
| 260 | I->eraseFromParent(); |
| 261 | return true; |
| 262 | } |
| 263 | |
| 264 | // Otherwise, can't handle this. |
| 265 | return true; |
| 266 | } |
| 267 | |
| 268 | |
| 269 | unsigned ARMBaseInstrInfo::RemoveBranch(MachineBasicBlock &MBB) const { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 270 | MachineBasicBlock::iterator I = MBB.end(); |
| 271 | if (I == MBB.begin()) return 0; |
| 272 | --I; |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 273 | if (!isUncondBranchOpcode(I->getOpcode()) && |
| 274 | !isCondBranchOpcode(I->getOpcode())) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 275 | return 0; |
| 276 | |
| 277 | // Remove the branch. |
| 278 | I->eraseFromParent(); |
| 279 | |
| 280 | I = MBB.end(); |
| 281 | |
| 282 | if (I == MBB.begin()) return 1; |
| 283 | --I; |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 284 | if (!isCondBranchOpcode(I->getOpcode())) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 285 | return 1; |
| 286 | |
| 287 | // Remove the branch. |
| 288 | I->eraseFromParent(); |
| 289 | return 2; |
| 290 | } |
| 291 | |
| 292 | unsigned |
| 293 | ARMBaseInstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB, |
| 294 | MachineBasicBlock *FBB, |
| 295 | const SmallVectorImpl<MachineOperand> &Cond) const { |
| 296 | // FIXME this should probably have a DebugLoc argument |
| 297 | DebugLoc dl = DebugLoc::getUnknownLoc(); |
Evan Cheng | 6495f63 | 2009-07-28 05:48:47 +0000 | [diff] [blame] | 298 | |
| 299 | ARMFunctionInfo *AFI = MBB.getParent()->getInfo<ARMFunctionInfo>(); |
| 300 | int BOpc = !AFI->isThumbFunction() |
| 301 | ? ARM::B : (AFI->isThumb2Function() ? ARM::t2B : ARM::tB); |
| 302 | int BccOpc = !AFI->isThumbFunction() |
| 303 | ? ARM::Bcc : (AFI->isThumb2Function() ? ARM::t2Bcc : ARM::tBcc); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 304 | |
| 305 | // Shouldn't be a fall through. |
| 306 | assert(TBB && "InsertBranch must not be told to insert a fallthrough"); |
| 307 | assert((Cond.size() == 2 || Cond.size() == 0) && |
| 308 | "ARM branch conditions have two components!"); |
| 309 | |
| 310 | if (FBB == 0) { |
| 311 | if (Cond.empty()) // Unconditional branch? |
| 312 | BuildMI(&MBB, dl, get(BOpc)).addMBB(TBB); |
| 313 | else |
| 314 | BuildMI(&MBB, dl, get(BccOpc)).addMBB(TBB) |
| 315 | .addImm(Cond[0].getImm()).addReg(Cond[1].getReg()); |
| 316 | return 1; |
| 317 | } |
| 318 | |
| 319 | // Two-way conditional branch. |
| 320 | BuildMI(&MBB, dl, get(BccOpc)).addMBB(TBB) |
| 321 | .addImm(Cond[0].getImm()).addReg(Cond[1].getReg()); |
| 322 | BuildMI(&MBB, dl, get(BOpc)).addMBB(FBB); |
| 323 | return 2; |
| 324 | } |
| 325 | |
| 326 | bool ARMBaseInstrInfo:: |
| 327 | ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const { |
| 328 | ARMCC::CondCodes CC = (ARMCC::CondCodes)(int)Cond[0].getImm(); |
| 329 | Cond[0].setImm(ARMCC::getOppositeCondition(CC)); |
| 330 | return false; |
| 331 | } |
| 332 | |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 333 | bool ARMBaseInstrInfo:: |
| 334 | PredicateInstruction(MachineInstr *MI, |
| 335 | const SmallVectorImpl<MachineOperand> &Pred) const { |
| 336 | unsigned Opc = MI->getOpcode(); |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 337 | if (isUncondBranchOpcode(Opc)) { |
| 338 | MI->setDesc(get(getMatchingCondBranchOpcode(Opc))); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 339 | MI->addOperand(MachineOperand::CreateImm(Pred[0].getImm())); |
| 340 | MI->addOperand(MachineOperand::CreateReg(Pred[1].getReg(), false)); |
| 341 | return true; |
| 342 | } |
| 343 | |
| 344 | int PIdx = MI->findFirstPredOperandIdx(); |
| 345 | if (PIdx != -1) { |
| 346 | MachineOperand &PMO = MI->getOperand(PIdx); |
| 347 | PMO.setImm(Pred[0].getImm()); |
| 348 | MI->getOperand(PIdx+1).setReg(Pred[1].getReg()); |
| 349 | return true; |
| 350 | } |
| 351 | return false; |
| 352 | } |
| 353 | |
| 354 | bool ARMBaseInstrInfo:: |
| 355 | SubsumesPredicate(const SmallVectorImpl<MachineOperand> &Pred1, |
| 356 | const SmallVectorImpl<MachineOperand> &Pred2) const { |
| 357 | if (Pred1.size() > 2 || Pred2.size() > 2) |
| 358 | return false; |
| 359 | |
| 360 | ARMCC::CondCodes CC1 = (ARMCC::CondCodes)Pred1[0].getImm(); |
| 361 | ARMCC::CondCodes CC2 = (ARMCC::CondCodes)Pred2[0].getImm(); |
| 362 | if (CC1 == CC2) |
| 363 | return true; |
| 364 | |
| 365 | switch (CC1) { |
| 366 | default: |
| 367 | return false; |
| 368 | case ARMCC::AL: |
| 369 | return true; |
| 370 | case ARMCC::HS: |
| 371 | return CC2 == ARMCC::HI; |
| 372 | case ARMCC::LS: |
| 373 | return CC2 == ARMCC::LO || CC2 == ARMCC::EQ; |
| 374 | case ARMCC::GE: |
| 375 | return CC2 == ARMCC::GT; |
| 376 | case ARMCC::LE: |
| 377 | return CC2 == ARMCC::LT; |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | bool ARMBaseInstrInfo::DefinesPredicate(MachineInstr *MI, |
| 382 | std::vector<MachineOperand> &Pred) const { |
Evan Cheng | 8fb9036 | 2009-08-08 03:20:32 +0000 | [diff] [blame] | 383 | // FIXME: This confuses implicit_def with optional CPSR def. |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 384 | const TargetInstrDesc &TID = MI->getDesc(); |
| 385 | if (!TID.getImplicitDefs() && !TID.hasOptionalDef()) |
| 386 | return false; |
| 387 | |
| 388 | bool Found = false; |
| 389 | for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) { |
| 390 | const MachineOperand &MO = MI->getOperand(i); |
| 391 | if (MO.isReg() && MO.getReg() == ARM::CPSR) { |
| 392 | Pred.push_back(MO); |
| 393 | Found = true; |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | return Found; |
| 398 | } |
| 399 | |
| 400 | |
| 401 | /// FIXME: Works around a gcc miscompilation with -fstrict-aliasing |
| 402 | static unsigned getNumJTEntries(const std::vector<MachineJumpTableEntry> &JT, |
| 403 | unsigned JTI) DISABLE_INLINE; |
| 404 | static unsigned getNumJTEntries(const std::vector<MachineJumpTableEntry> &JT, |
| 405 | unsigned JTI) { |
| 406 | return JT[JTI].MBBs.size(); |
| 407 | } |
| 408 | |
| 409 | /// GetInstSize - Return the size of the specified MachineInstr. |
| 410 | /// |
| 411 | unsigned ARMBaseInstrInfo::GetInstSizeInBytes(const MachineInstr *MI) const { |
| 412 | const MachineBasicBlock &MBB = *MI->getParent(); |
| 413 | const MachineFunction *MF = MBB.getParent(); |
Chris Lattner | 33adcfb | 2009-08-22 21:43:10 +0000 | [diff] [blame] | 414 | const MCAsmInfo *MAI = MF->getTarget().getMCAsmInfo(); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 415 | |
| 416 | // Basic size info comes from the TSFlags field. |
| 417 | const TargetInstrDesc &TID = MI->getDesc(); |
| 418 | unsigned TSFlags = TID.TSFlags; |
| 419 | |
Evan Cheng | a0ee862 | 2009-07-31 22:22:22 +0000 | [diff] [blame] | 420 | unsigned Opc = MI->getOpcode(); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 421 | switch ((TSFlags & ARMII::SizeMask) >> ARMII::SizeShift) { |
| 422 | default: { |
| 423 | // If this machine instr is an inline asm, measure it. |
| 424 | if (MI->getOpcode() == ARM::INLINEASM) |
Chris Lattner | 33adcfb | 2009-08-22 21:43:10 +0000 | [diff] [blame] | 425 | return getInlineAsmLength(MI->getOperand(0).getSymbolName(), *MAI); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 426 | if (MI->isLabel()) |
| 427 | return 0; |
Evan Cheng | a0ee862 | 2009-07-31 22:22:22 +0000 | [diff] [blame] | 428 | switch (Opc) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 429 | default: |
Torok Edwin | c23197a | 2009-07-14 16:55:14 +0000 | [diff] [blame] | 430 | llvm_unreachable("Unknown or unset size field for instr!"); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 431 | case TargetInstrInfo::IMPLICIT_DEF: |
Jakob Stoklund Olesen | 26207e5 | 2009-09-28 20:32:26 +0000 | [diff] [blame] | 432 | case TargetInstrInfo::KILL: |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 433 | case TargetInstrInfo::DBG_LABEL: |
| 434 | case TargetInstrInfo::EH_LABEL: |
| 435 | return 0; |
| 436 | } |
| 437 | break; |
| 438 | } |
Evan Cheng | 7894762 | 2009-07-24 18:20:44 +0000 | [diff] [blame] | 439 | case ARMII::Size8Bytes: return 8; // ARM instruction x 2. |
| 440 | case ARMII::Size4Bytes: return 4; // ARM / Thumb2 instruction. |
| 441 | case ARMII::Size2Bytes: return 2; // Thumb1 instruction. |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 442 | case ARMII::SizeSpecial: { |
Evan Cheng | a0ee862 | 2009-07-31 22:22:22 +0000 | [diff] [blame] | 443 | switch (Opc) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 444 | case ARM::CONSTPOOL_ENTRY: |
| 445 | // If this machine instr is a constant pool entry, its size is recorded as |
| 446 | // operand #2. |
| 447 | return MI->getOperand(2).getImm(); |
Evan Cheng | 7894762 | 2009-07-24 18:20:44 +0000 | [diff] [blame] | 448 | case ARM::Int_eh_sjlj_setjmp: |
Jim Grosbach | cdc17eb | 2009-08-11 17:08:15 +0000 | [diff] [blame] | 449 | return 24; |
Jim Grosbach | 5aa1684 | 2009-08-11 19:42:21 +0000 | [diff] [blame] | 450 | case ARM::t2Int_eh_sjlj_setjmp: |
Evan Cheng | 5a1cd36 | 2009-11-03 23:13:34 +0000 | [diff] [blame^] | 451 | return 22; |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 452 | case ARM::BR_JTr: |
| 453 | case ARM::BR_JTm: |
| 454 | case ARM::BR_JTadd: |
Evan Cheng | a0ee862 | 2009-07-31 22:22:22 +0000 | [diff] [blame] | 455 | case ARM::tBR_JTr: |
Evan Cheng | d26b14c | 2009-07-31 18:28:05 +0000 | [diff] [blame] | 456 | case ARM::t2BR_JT: |
| 457 | case ARM::t2TBB: |
| 458 | case ARM::t2TBH: { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 459 | // These are jumptable branches, i.e. a branch followed by an inlined |
Evan Cheng | d26b14c | 2009-07-31 18:28:05 +0000 | [diff] [blame] | 460 | // jumptable. The size is 4 + 4 * number of entries. For TBB, each |
| 461 | // entry is one byte; TBH two byte each. |
Evan Cheng | a0ee862 | 2009-07-31 22:22:22 +0000 | [diff] [blame] | 462 | unsigned EntrySize = (Opc == ARM::t2TBB) |
| 463 | ? 1 : ((Opc == ARM::t2TBH) ? 2 : 4); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 464 | unsigned NumOps = TID.getNumOperands(); |
| 465 | MachineOperand JTOP = |
| 466 | MI->getOperand(NumOps - (TID.isPredicable() ? 3 : 2)); |
| 467 | unsigned JTI = JTOP.getIndex(); |
| 468 | const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo(); |
| 469 | const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables(); |
| 470 | assert(JTI < JT.size()); |
| 471 | // Thumb instructions are 2 byte aligned, but JT entries are 4 byte |
| 472 | // 4 aligned. The assembler / linker may add 2 byte padding just before |
| 473 | // the JT entries. The size does not include this padding; the |
| 474 | // constant islands pass does separate bookkeeping for it. |
| 475 | // FIXME: If we know the size of the function is less than (1 << 16) *2 |
| 476 | // bytes, we can use 16-bit entries instead. Then there won't be an |
| 477 | // alignment issue. |
Evan Cheng | 25f7cfc | 2009-08-01 06:13:52 +0000 | [diff] [blame] | 478 | unsigned InstSize = (Opc == ARM::tBR_JTr || Opc == ARM::t2BR_JT) ? 2 : 4; |
| 479 | unsigned NumEntries = getNumJTEntries(JT, JTI); |
| 480 | if (Opc == ARM::t2TBB && (NumEntries & 1)) |
| 481 | // Make sure the instruction that follows TBB is 2-byte aligned. |
| 482 | // FIXME: Constant island pass should insert an "ALIGN" instruction |
| 483 | // instead. |
| 484 | ++NumEntries; |
| 485 | return NumEntries * EntrySize + InstSize; |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 486 | } |
| 487 | default: |
| 488 | // Otherwise, pseudo-instruction sizes are zero. |
| 489 | return 0; |
| 490 | } |
| 491 | } |
| 492 | } |
| 493 | return 0; // Not reached |
| 494 | } |
| 495 | |
| 496 | /// Return true if the instruction is a register to register move and |
| 497 | /// leave the source and dest operands in the passed parameters. |
| 498 | /// |
| 499 | bool |
| 500 | ARMBaseInstrInfo::isMoveInstr(const MachineInstr &MI, |
| 501 | unsigned &SrcReg, unsigned &DstReg, |
| 502 | unsigned& SrcSubIdx, unsigned& DstSubIdx) const { |
| 503 | SrcSubIdx = DstSubIdx = 0; // No sub-registers. |
| 504 | |
Evan Cheng | 68e3c6a | 2009-07-27 00:05:15 +0000 | [diff] [blame] | 505 | switch (MI.getOpcode()) { |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 506 | default: break; |
Evan Cheng | 68e3c6a | 2009-07-27 00:05:15 +0000 | [diff] [blame] | 507 | case ARM::FCPYS: |
| 508 | case ARM::FCPYD: |
| 509 | case ARM::VMOVD: |
Anton Korobeynikov | f95215f | 2009-11-02 00:10:38 +0000 | [diff] [blame] | 510 | case ARM::VMOVQ: { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 511 | SrcReg = MI.getOperand(1).getReg(); |
| 512 | DstReg = MI.getOperand(0).getReg(); |
| 513 | return true; |
| 514 | } |
Evan Cheng | 68e3c6a | 2009-07-27 00:05:15 +0000 | [diff] [blame] | 515 | case ARM::MOVr: |
| 516 | case ARM::tMOVr: |
| 517 | case ARM::tMOVgpr2tgpr: |
| 518 | case ARM::tMOVtgpr2gpr: |
| 519 | case ARM::tMOVgpr2gpr: |
| 520 | case ARM::t2MOVr: { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 521 | assert(MI.getDesc().getNumOperands() >= 2 && |
| 522 | MI.getOperand(0).isReg() && |
| 523 | MI.getOperand(1).isReg() && |
| 524 | "Invalid ARM MOV instruction"); |
| 525 | SrcReg = MI.getOperand(1).getReg(); |
| 526 | DstReg = MI.getOperand(0).getReg(); |
| 527 | return true; |
| 528 | } |
Evan Cheng | 68e3c6a | 2009-07-27 00:05:15 +0000 | [diff] [blame] | 529 | } |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 530 | |
| 531 | return false; |
| 532 | } |
| 533 | |
Jim Grosbach | 764ab52 | 2009-08-11 15:33:49 +0000 | [diff] [blame] | 534 | unsigned |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 535 | ARMBaseInstrInfo::isLoadFromStackSlot(const MachineInstr *MI, |
| 536 | int &FrameIndex) const { |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 537 | switch (MI->getOpcode()) { |
| 538 | default: break; |
| 539 | case ARM::LDR: |
| 540 | case ARM::t2LDRs: // FIXME: don't use t2LDRs to access frame. |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 541 | if (MI->getOperand(1).isFI() && |
| 542 | MI->getOperand(2).isReg() && |
| 543 | MI->getOperand(3).isImm() && |
| 544 | MI->getOperand(2).getReg() == 0 && |
| 545 | MI->getOperand(3).getImm() == 0) { |
| 546 | FrameIndex = MI->getOperand(1).getIndex(); |
| 547 | return MI->getOperand(0).getReg(); |
| 548 | } |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 549 | break; |
| 550 | case ARM::t2LDRi12: |
| 551 | case ARM::tRestore: |
David Goodwin | 5ff58b5 | 2009-07-24 00:16:18 +0000 | [diff] [blame] | 552 | if (MI->getOperand(1).isFI() && |
| 553 | MI->getOperand(2).isImm() && |
| 554 | MI->getOperand(2).getImm() == 0) { |
| 555 | FrameIndex = MI->getOperand(1).getIndex(); |
| 556 | return MI->getOperand(0).getReg(); |
| 557 | } |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 558 | break; |
| 559 | case ARM::FLDD: |
| 560 | case ARM::FLDS: |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 561 | if (MI->getOperand(1).isFI() && |
| 562 | MI->getOperand(2).isImm() && |
| 563 | MI->getOperand(2).getImm() == 0) { |
| 564 | FrameIndex = MI->getOperand(1).getIndex(); |
| 565 | return MI->getOperand(0).getReg(); |
| 566 | } |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 567 | break; |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 568 | } |
| 569 | |
| 570 | return 0; |
| 571 | } |
| 572 | |
| 573 | unsigned |
| 574 | ARMBaseInstrInfo::isStoreToStackSlot(const MachineInstr *MI, |
| 575 | int &FrameIndex) const { |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 576 | switch (MI->getOpcode()) { |
| 577 | default: break; |
| 578 | case ARM::STR: |
| 579 | case ARM::t2STRs: // FIXME: don't use t2STRs to access frame. |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 580 | if (MI->getOperand(1).isFI() && |
| 581 | MI->getOperand(2).isReg() && |
| 582 | MI->getOperand(3).isImm() && |
| 583 | MI->getOperand(2).getReg() == 0 && |
| 584 | MI->getOperand(3).getImm() == 0) { |
| 585 | FrameIndex = MI->getOperand(1).getIndex(); |
| 586 | return MI->getOperand(0).getReg(); |
| 587 | } |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 588 | break; |
| 589 | case ARM::t2STRi12: |
| 590 | case ARM::tSpill: |
David Goodwin | 5ff58b5 | 2009-07-24 00:16:18 +0000 | [diff] [blame] | 591 | if (MI->getOperand(1).isFI() && |
| 592 | MI->getOperand(2).isImm() && |
| 593 | MI->getOperand(2).getImm() == 0) { |
| 594 | FrameIndex = MI->getOperand(1).getIndex(); |
| 595 | return MI->getOperand(0).getReg(); |
| 596 | } |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 597 | break; |
| 598 | case ARM::FSTD: |
Evan Cheng | 1d2426c | 2009-08-07 19:30:41 +0000 | [diff] [blame] | 599 | case ARM::FSTS: |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 600 | if (MI->getOperand(1).isFI() && |
| 601 | MI->getOperand(2).isImm() && |
| 602 | MI->getOperand(2).getImm() == 0) { |
| 603 | FrameIndex = MI->getOperand(1).getIndex(); |
| 604 | return MI->getOperand(0).getReg(); |
| 605 | } |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 606 | break; |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 607 | } |
| 608 | |
| 609 | return 0; |
| 610 | } |
| 611 | |
| 612 | bool |
| 613 | ARMBaseInstrInfo::copyRegToReg(MachineBasicBlock &MBB, |
| 614 | MachineBasicBlock::iterator I, |
| 615 | unsigned DestReg, unsigned SrcReg, |
| 616 | const TargetRegisterClass *DestRC, |
| 617 | const TargetRegisterClass *SrcRC) const { |
| 618 | DebugLoc DL = DebugLoc::getUnknownLoc(); |
| 619 | if (I != MBB.end()) DL = I->getDebugLoc(); |
| 620 | |
| 621 | if (DestRC != SrcRC) { |
Evan Cheng | b4db6a4 | 2009-11-03 05:51:39 +0000 | [diff] [blame] | 622 | if (DestRC->getSize() != SrcRC->getSize()) |
| 623 | return false; |
| 624 | |
| 625 | // Allow DPR / DPR_VFP2 / DPR_8 cross-class copies. |
| 626 | // Allow QPR / QPR_VFP2 / QPR_8 cross-class copies. |
| 627 | if (DestRC->getSize() != 8 && DestRC->getSize() != 16) |
David Goodwin | 7bfdca0 | 2009-08-05 21:02:22 +0000 | [diff] [blame] | 628 | return false; |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 629 | } |
| 630 | |
David Goodwin | 7bfdca0 | 2009-08-05 21:02:22 +0000 | [diff] [blame] | 631 | if (DestRC == ARM::GPRRegisterClass) { |
Evan Cheng | 08b93c6 | 2009-07-27 00:33:08 +0000 | [diff] [blame] | 632 | AddDefaultCC(AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::MOVr), |
Evan Cheng | dd6f632 | 2009-07-11 06:37:27 +0000 | [diff] [blame] | 633 | DestReg).addReg(SrcReg))); |
David Goodwin | 7bfdca0 | 2009-08-05 21:02:22 +0000 | [diff] [blame] | 634 | } else if (DestRC == ARM::SPRRegisterClass) { |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 635 | AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::FCPYS), DestReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 636 | .addReg(SrcReg)); |
Evan Cheng | b4db6a4 | 2009-11-03 05:51:39 +0000 | [diff] [blame] | 637 | } else if (DestRC == ARM::DPRRegisterClass) { |
| 638 | AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::FCPYD), DestReg) |
| 639 | .addReg(SrcReg)); |
Anton Korobeynikov | f95215f | 2009-11-02 00:10:38 +0000 | [diff] [blame] | 640 | } else if (DestRC == ARM::DPR_VFP2RegisterClass || |
| 641 | DestRC == ARM::DPR_8RegisterClass || |
| 642 | SrcRC == ARM::DPR_VFP2RegisterClass || |
| 643 | SrcRC == ARM::DPR_8RegisterClass) { |
| 644 | // Always use neon reg-reg move if source or dest is NEON-only regclass. |
| 645 | BuildMI(MBB, I, DL, get(ARM::VMOVD), DestReg).addReg(SrcReg); |
Anton Korobeynikov | e56f908 | 2009-09-12 22:21:08 +0000 | [diff] [blame] | 646 | } else if (DestRC == ARM::QPRRegisterClass || |
Evan Cheng | b4db6a4 | 2009-11-03 05:51:39 +0000 | [diff] [blame] | 647 | DestRC == ARM::QPR_VFP2RegisterClass || |
| 648 | DestRC == ARM::QPR_8RegisterClass) { |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 649 | BuildMI(MBB, I, DL, get(ARM::VMOVQ), DestReg).addReg(SrcReg); |
David Goodwin | 7bfdca0 | 2009-08-05 21:02:22 +0000 | [diff] [blame] | 650 | } else { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 651 | return false; |
David Goodwin | 7bfdca0 | 2009-08-05 21:02:22 +0000 | [diff] [blame] | 652 | } |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 653 | |
| 654 | return true; |
| 655 | } |
| 656 | |
| 657 | void ARMBaseInstrInfo:: |
| 658 | storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I, |
| 659 | unsigned SrcReg, bool isKill, int FI, |
| 660 | const TargetRegisterClass *RC) const { |
| 661 | DebugLoc DL = DebugLoc::getUnknownLoc(); |
| 662 | if (I != MBB.end()) DL = I->getDebugLoc(); |
Anton Korobeynikov | 249fb33 | 2009-10-07 00:06:35 +0000 | [diff] [blame] | 663 | MachineFunction &MF = *MBB.getParent(); |
| 664 | MachineFrameInfo &MFI = *MF.getFrameInfo(); |
| 665 | |
| 666 | MachineMemOperand *MMO = |
Evan Cheng | ff89dcb | 2009-10-18 18:16:27 +0000 | [diff] [blame] | 667 | MF.getMachineMemOperand(PseudoSourceValue::getFixedStack(FI), |
Anton Korobeynikov | 249fb33 | 2009-10-07 00:06:35 +0000 | [diff] [blame] | 668 | MachineMemOperand::MOStore, 0, |
| 669 | MFI.getObjectSize(FI), |
| 670 | MFI.getObjectAlignment(FI)); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 671 | |
| 672 | if (RC == ARM::GPRRegisterClass) { |
Evan Cheng | 5732ca0 | 2009-07-27 03:14:20 +0000 | [diff] [blame] | 673 | AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::STR)) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 674 | .addReg(SrcReg, getKillRegState(isKill)) |
Anton Korobeynikov | 249fb33 | 2009-10-07 00:06:35 +0000 | [diff] [blame] | 675 | .addFrameIndex(FI).addReg(0).addImm(0).addMemOperand(MMO)); |
Anton Korobeynikov | 6ca0b9e | 2009-09-08 15:22:32 +0000 | [diff] [blame] | 676 | } else if (RC == ARM::DPRRegisterClass || |
| 677 | RC == ARM::DPR_VFP2RegisterClass || |
| 678 | RC == ARM::DPR_8RegisterClass) { |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 679 | AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::FSTD)) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 680 | .addReg(SrcReg, getKillRegState(isKill)) |
Anton Korobeynikov | 249fb33 | 2009-10-07 00:06:35 +0000 | [diff] [blame] | 681 | .addFrameIndex(FI).addImm(0).addMemOperand(MMO)); |
Anton Korobeynikov | baf3108 | 2009-08-08 13:35:48 +0000 | [diff] [blame] | 682 | } else if (RC == ARM::SPRRegisterClass) { |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 683 | AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::FSTS)) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 684 | .addReg(SrcReg, getKillRegState(isKill)) |
Anton Korobeynikov | 249fb33 | 2009-10-07 00:06:35 +0000 | [diff] [blame] | 685 | .addFrameIndex(FI).addImm(0).addMemOperand(MMO)); |
Anton Korobeynikov | baf3108 | 2009-08-08 13:35:48 +0000 | [diff] [blame] | 686 | } else { |
Anton Korobeynikov | e56f908 | 2009-09-12 22:21:08 +0000 | [diff] [blame] | 687 | assert((RC == ARM::QPRRegisterClass || |
| 688 | RC == ARM::QPR_VFP2RegisterClass) && "Unknown regclass!"); |
Anton Korobeynikov | baf3108 | 2009-08-08 13:35:48 +0000 | [diff] [blame] | 689 | // FIXME: Neon instructions should support predicates |
| 690 | BuildMI(MBB, I, DL, get(ARM::VSTRQ)).addReg(SrcReg, getKillRegState(isKill)) |
Anton Korobeynikov | 249fb33 | 2009-10-07 00:06:35 +0000 | [diff] [blame] | 691 | .addFrameIndex(FI).addImm(0).addMemOperand(MMO); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 692 | } |
| 693 | } |
| 694 | |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 695 | void ARMBaseInstrInfo:: |
| 696 | loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I, |
| 697 | unsigned DestReg, int FI, |
| 698 | const TargetRegisterClass *RC) const { |
| 699 | DebugLoc DL = DebugLoc::getUnknownLoc(); |
| 700 | if (I != MBB.end()) DL = I->getDebugLoc(); |
Anton Korobeynikov | 249fb33 | 2009-10-07 00:06:35 +0000 | [diff] [blame] | 701 | MachineFunction &MF = *MBB.getParent(); |
| 702 | MachineFrameInfo &MFI = *MF.getFrameInfo(); |
| 703 | |
| 704 | MachineMemOperand *MMO = |
Evan Cheng | ff89dcb | 2009-10-18 18:16:27 +0000 | [diff] [blame] | 705 | MF.getMachineMemOperand(PseudoSourceValue::getFixedStack(FI), |
Anton Korobeynikov | 249fb33 | 2009-10-07 00:06:35 +0000 | [diff] [blame] | 706 | MachineMemOperand::MOLoad, 0, |
| 707 | MFI.getObjectSize(FI), |
| 708 | MFI.getObjectAlignment(FI)); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 709 | |
| 710 | if (RC == ARM::GPRRegisterClass) { |
Evan Cheng | 5732ca0 | 2009-07-27 03:14:20 +0000 | [diff] [blame] | 711 | AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::LDR), DestReg) |
Anton Korobeynikov | 249fb33 | 2009-10-07 00:06:35 +0000 | [diff] [blame] | 712 | .addFrameIndex(FI).addReg(0).addImm(0).addMemOperand(MMO)); |
Anton Korobeynikov | 6ca0b9e | 2009-09-08 15:22:32 +0000 | [diff] [blame] | 713 | } else if (RC == ARM::DPRRegisterClass || |
| 714 | RC == ARM::DPR_VFP2RegisterClass || |
| 715 | RC == ARM::DPR_8RegisterClass) { |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 716 | AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::FLDD), DestReg) |
Anton Korobeynikov | 249fb33 | 2009-10-07 00:06:35 +0000 | [diff] [blame] | 717 | .addFrameIndex(FI).addImm(0).addMemOperand(MMO)); |
Anton Korobeynikov | baf3108 | 2009-08-08 13:35:48 +0000 | [diff] [blame] | 718 | } else if (RC == ARM::SPRRegisterClass) { |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 719 | AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::FLDS), DestReg) |
Anton Korobeynikov | 249fb33 | 2009-10-07 00:06:35 +0000 | [diff] [blame] | 720 | .addFrameIndex(FI).addImm(0).addMemOperand(MMO)); |
Anton Korobeynikov | baf3108 | 2009-08-08 13:35:48 +0000 | [diff] [blame] | 721 | } else { |
Anton Korobeynikov | e56f908 | 2009-09-12 22:21:08 +0000 | [diff] [blame] | 722 | assert((RC == ARM::QPRRegisterClass || |
Evan Cheng | b4db6a4 | 2009-11-03 05:51:39 +0000 | [diff] [blame] | 723 | RC == ARM::QPR_VFP2RegisterClass || |
| 724 | RC == ARM::QPR_8RegisterClass) && "Unknown regclass!"); |
Anton Korobeynikov | baf3108 | 2009-08-08 13:35:48 +0000 | [diff] [blame] | 725 | // FIXME: Neon instructions should support predicates |
Evan Cheng | 5a850be | 2009-10-24 02:07:42 +0000 | [diff] [blame] | 726 | BuildMI(MBB, I, DL, get(ARM::VLDRQ), DestReg).addFrameIndex(FI).addImm(0). |
| 727 | addMemOperand(MMO); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 728 | } |
| 729 | } |
| 730 | |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 731 | MachineInstr *ARMBaseInstrInfo:: |
| 732 | foldMemoryOperandImpl(MachineFunction &MF, MachineInstr *MI, |
| 733 | const SmallVectorImpl<unsigned> &Ops, int FI) const { |
| 734 | if (Ops.size() != 1) return NULL; |
| 735 | |
| 736 | unsigned OpNum = Ops[0]; |
| 737 | unsigned Opc = MI->getOpcode(); |
| 738 | MachineInstr *NewMI = NULL; |
Evan Cheng | 19068ba | 2009-08-10 06:32:05 +0000 | [diff] [blame] | 739 | if (Opc == ARM::MOVr || Opc == ARM::t2MOVr) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 740 | // If it is updating CPSR, then it cannot be folded. |
Evan Cheng | 19068ba | 2009-08-10 06:32:05 +0000 | [diff] [blame] | 741 | if (MI->getOperand(4).getReg() == ARM::CPSR && !MI->getOperand(4).isDead()) |
| 742 | return NULL; |
| 743 | unsigned Pred = MI->getOperand(2).getImm(); |
| 744 | unsigned PredReg = MI->getOperand(3).getReg(); |
| 745 | if (OpNum == 0) { // move -> store |
| 746 | unsigned SrcReg = MI->getOperand(1).getReg(); |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 747 | unsigned SrcSubReg = MI->getOperand(1).getSubReg(); |
Evan Cheng | 19068ba | 2009-08-10 06:32:05 +0000 | [diff] [blame] | 748 | bool isKill = MI->getOperand(1).isKill(); |
| 749 | bool isUndef = MI->getOperand(1).isUndef(); |
| 750 | if (Opc == ARM::MOVr) |
| 751 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::STR)) |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 752 | .addReg(SrcReg, |
| 753 | getKillRegState(isKill) | getUndefRegState(isUndef), |
| 754 | SrcSubReg) |
Evan Cheng | 19068ba | 2009-08-10 06:32:05 +0000 | [diff] [blame] | 755 | .addFrameIndex(FI).addReg(0).addImm(0).addImm(Pred).addReg(PredReg); |
| 756 | else // ARM::t2MOVr |
| 757 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::t2STRi12)) |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 758 | .addReg(SrcReg, |
| 759 | getKillRegState(isKill) | getUndefRegState(isUndef), |
| 760 | SrcSubReg) |
Evan Cheng | 19068ba | 2009-08-10 06:32:05 +0000 | [diff] [blame] | 761 | .addFrameIndex(FI).addImm(0).addImm(Pred).addReg(PredReg); |
| 762 | } else { // move -> load |
| 763 | unsigned DstReg = MI->getOperand(0).getReg(); |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 764 | unsigned DstSubReg = MI->getOperand(0).getSubReg(); |
Evan Cheng | 19068ba | 2009-08-10 06:32:05 +0000 | [diff] [blame] | 765 | bool isDead = MI->getOperand(0).isDead(); |
| 766 | bool isUndef = MI->getOperand(0).isUndef(); |
| 767 | if (Opc == ARM::MOVr) |
| 768 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::LDR)) |
| 769 | .addReg(DstReg, |
| 770 | RegState::Define | |
| 771 | getDeadRegState(isDead) | |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 772 | getUndefRegState(isUndef), DstSubReg) |
Evan Cheng | 19068ba | 2009-08-10 06:32:05 +0000 | [diff] [blame] | 773 | .addFrameIndex(FI).addReg(0).addImm(0).addImm(Pred).addReg(PredReg); |
| 774 | else // ARM::t2MOVr |
| 775 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::t2LDRi12)) |
| 776 | .addReg(DstReg, |
| 777 | RegState::Define | |
| 778 | getDeadRegState(isDead) | |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 779 | getUndefRegState(isUndef), DstSubReg) |
Evan Cheng | 19068ba | 2009-08-10 06:32:05 +0000 | [diff] [blame] | 780 | .addFrameIndex(FI).addImm(0).addImm(Pred).addReg(PredReg); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 781 | } |
Evan Cheng | 19068ba | 2009-08-10 06:32:05 +0000 | [diff] [blame] | 782 | } else if (Opc == ARM::tMOVgpr2gpr || |
| 783 | Opc == ARM::tMOVtgpr2gpr || |
| 784 | Opc == ARM::tMOVgpr2tgpr) { |
| 785 | if (OpNum == 0) { // move -> store |
| 786 | unsigned SrcReg = MI->getOperand(1).getReg(); |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 787 | unsigned SrcSubReg = MI->getOperand(1).getSubReg(); |
Evan Cheng | 19068ba | 2009-08-10 06:32:05 +0000 | [diff] [blame] | 788 | bool isKill = MI->getOperand(1).isKill(); |
| 789 | bool isUndef = MI->getOperand(1).isUndef(); |
| 790 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::t2STRi12)) |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 791 | .addReg(SrcReg, |
| 792 | getKillRegState(isKill) | getUndefRegState(isUndef), |
| 793 | SrcSubReg) |
Evan Cheng | 19068ba | 2009-08-10 06:32:05 +0000 | [diff] [blame] | 794 | .addFrameIndex(FI).addImm(0).addImm(ARMCC::AL).addReg(0); |
| 795 | } else { // move -> load |
| 796 | unsigned DstReg = MI->getOperand(0).getReg(); |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 797 | unsigned DstSubReg = MI->getOperand(0).getSubReg(); |
Evan Cheng | 19068ba | 2009-08-10 06:32:05 +0000 | [diff] [blame] | 798 | bool isDead = MI->getOperand(0).isDead(); |
| 799 | bool isUndef = MI->getOperand(0).isUndef(); |
| 800 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::t2LDRi12)) |
| 801 | .addReg(DstReg, |
| 802 | RegState::Define | |
| 803 | getDeadRegState(isDead) | |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 804 | getUndefRegState(isUndef), |
| 805 | DstSubReg) |
Evan Cheng | 19068ba | 2009-08-10 06:32:05 +0000 | [diff] [blame] | 806 | .addFrameIndex(FI).addImm(0).addImm(ARMCC::AL).addReg(0); |
| 807 | } |
| 808 | } else if (Opc == ARM::FCPYS) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 809 | unsigned Pred = MI->getOperand(2).getImm(); |
| 810 | unsigned PredReg = MI->getOperand(3).getReg(); |
| 811 | if (OpNum == 0) { // move -> store |
| 812 | unsigned SrcReg = MI->getOperand(1).getReg(); |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 813 | unsigned SrcSubReg = MI->getOperand(1).getSubReg(); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 814 | bool isKill = MI->getOperand(1).isKill(); |
| 815 | bool isUndef = MI->getOperand(1).isUndef(); |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 816 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::FSTS)) |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 817 | .addReg(SrcReg, getKillRegState(isKill) | getUndefRegState(isUndef), |
| 818 | SrcSubReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 819 | .addFrameIndex(FI) |
| 820 | .addImm(0).addImm(Pred).addReg(PredReg); |
| 821 | } else { // move -> load |
| 822 | unsigned DstReg = MI->getOperand(0).getReg(); |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 823 | unsigned DstSubReg = MI->getOperand(0).getSubReg(); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 824 | bool isDead = MI->getOperand(0).isDead(); |
| 825 | bool isUndef = MI->getOperand(0).isUndef(); |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 826 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::FLDS)) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 827 | .addReg(DstReg, |
| 828 | RegState::Define | |
| 829 | getDeadRegState(isDead) | |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 830 | getUndefRegState(isUndef), |
| 831 | DstSubReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 832 | .addFrameIndex(FI).addImm(0).addImm(Pred).addReg(PredReg); |
| 833 | } |
| 834 | } |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 835 | else if (Opc == ARM::FCPYD) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 836 | unsigned Pred = MI->getOperand(2).getImm(); |
| 837 | unsigned PredReg = MI->getOperand(3).getReg(); |
| 838 | if (OpNum == 0) { // move -> store |
| 839 | unsigned SrcReg = MI->getOperand(1).getReg(); |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 840 | unsigned SrcSubReg = MI->getOperand(1).getSubReg(); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 841 | bool isKill = MI->getOperand(1).isKill(); |
| 842 | bool isUndef = MI->getOperand(1).isUndef(); |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 843 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::FSTD)) |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 844 | .addReg(SrcReg, |
| 845 | getKillRegState(isKill) | getUndefRegState(isUndef), |
| 846 | SrcSubReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 847 | .addFrameIndex(FI).addImm(0).addImm(Pred).addReg(PredReg); |
| 848 | } else { // move -> load |
| 849 | unsigned DstReg = MI->getOperand(0).getReg(); |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 850 | unsigned DstSubReg = MI->getOperand(0).getSubReg(); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 851 | bool isDead = MI->getOperand(0).isDead(); |
| 852 | bool isUndef = MI->getOperand(0).isUndef(); |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 853 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::FLDD)) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 854 | .addReg(DstReg, |
| 855 | RegState::Define | |
| 856 | getDeadRegState(isDead) | |
Evan Cheng | ed3ad21 | 2009-10-25 07:52:27 +0000 | [diff] [blame] | 857 | getUndefRegState(isUndef), |
| 858 | DstSubReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 859 | .addFrameIndex(FI).addImm(0).addImm(Pred).addReg(PredReg); |
| 860 | } |
| 861 | } |
| 862 | |
| 863 | return NewMI; |
| 864 | } |
| 865 | |
Jim Grosbach | 764ab52 | 2009-08-11 15:33:49 +0000 | [diff] [blame] | 866 | MachineInstr* |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 867 | ARMBaseInstrInfo::foldMemoryOperandImpl(MachineFunction &MF, |
| 868 | MachineInstr* MI, |
| 869 | const SmallVectorImpl<unsigned> &Ops, |
| 870 | MachineInstr* LoadMI) const { |
Evan Cheng | 1f5c988 | 2009-07-27 04:18:04 +0000 | [diff] [blame] | 871 | // FIXME |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 872 | return 0; |
| 873 | } |
| 874 | |
| 875 | bool |
| 876 | ARMBaseInstrInfo::canFoldMemoryOperand(const MachineInstr *MI, |
Evan Cheng | 2294645 | 2009-08-10 05:51:48 +0000 | [diff] [blame] | 877 | const SmallVectorImpl<unsigned> &Ops) const { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 878 | if (Ops.size() != 1) return false; |
| 879 | |
| 880 | unsigned Opc = MI->getOpcode(); |
Evan Cheng | 5732ca0 | 2009-07-27 03:14:20 +0000 | [diff] [blame] | 881 | if (Opc == ARM::MOVr || Opc == ARM::t2MOVr) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 882 | // If it is updating CPSR, then it cannot be folded. |
Evan Cheng | 2294645 | 2009-08-10 05:51:48 +0000 | [diff] [blame] | 883 | return MI->getOperand(4).getReg() != ARM::CPSR || |
| 884 | MI->getOperand(4).isDead(); |
Evan Cheng | 19068ba | 2009-08-10 06:32:05 +0000 | [diff] [blame] | 885 | } else if (Opc == ARM::tMOVgpr2gpr || |
| 886 | Opc == ARM::tMOVtgpr2gpr || |
| 887 | Opc == ARM::tMOVgpr2tgpr) { |
| 888 | return true; |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 889 | } else if (Opc == ARM::FCPYS || Opc == ARM::FCPYD) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 890 | return true; |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 891 | } else if (Opc == ARM::VMOVD || Opc == ARM::VMOVQ) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 892 | return false; // FIXME |
| 893 | } |
| 894 | |
| 895 | return false; |
| 896 | } |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 897 | |
Evan Cheng | 8fb9036 | 2009-08-08 03:20:32 +0000 | [diff] [blame] | 898 | /// getInstrPredicate - If instruction is predicated, returns its predicate |
| 899 | /// condition, otherwise returns AL. It also returns the condition code |
| 900 | /// register by reference. |
Evan Cheng | 5adb66a | 2009-09-28 09:14:39 +0000 | [diff] [blame] | 901 | ARMCC::CondCodes |
| 902 | llvm::getInstrPredicate(const MachineInstr *MI, unsigned &PredReg) { |
Evan Cheng | 8fb9036 | 2009-08-08 03:20:32 +0000 | [diff] [blame] | 903 | int PIdx = MI->findFirstPredOperandIdx(); |
| 904 | if (PIdx == -1) { |
| 905 | PredReg = 0; |
| 906 | return ARMCC::AL; |
| 907 | } |
| 908 | |
| 909 | PredReg = MI->getOperand(PIdx+1).getReg(); |
| 910 | return (ARMCC::CondCodes)MI->getOperand(PIdx).getImm(); |
| 911 | } |
| 912 | |
| 913 | |
Evan Cheng | 6495f63 | 2009-07-28 05:48:47 +0000 | [diff] [blame] | 914 | int llvm::getMatchingCondBranchOpcode(int Opc) { |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 915 | if (Opc == ARM::B) |
| 916 | return ARM::Bcc; |
| 917 | else if (Opc == ARM::tB) |
| 918 | return ARM::tBcc; |
| 919 | else if (Opc == ARM::t2B) |
| 920 | return ARM::t2Bcc; |
| 921 | |
| 922 | llvm_unreachable("Unknown unconditional branch opcode!"); |
| 923 | return 0; |
| 924 | } |
| 925 | |
Evan Cheng | 6495f63 | 2009-07-28 05:48:47 +0000 | [diff] [blame] | 926 | |
| 927 | void llvm::emitARMRegPlusImmediate(MachineBasicBlock &MBB, |
| 928 | MachineBasicBlock::iterator &MBBI, DebugLoc dl, |
| 929 | unsigned DestReg, unsigned BaseReg, int NumBytes, |
| 930 | ARMCC::CondCodes Pred, unsigned PredReg, |
| 931 | const ARMBaseInstrInfo &TII) { |
| 932 | bool isSub = NumBytes < 0; |
| 933 | if (isSub) NumBytes = -NumBytes; |
| 934 | |
| 935 | while (NumBytes) { |
| 936 | unsigned RotAmt = ARM_AM::getSOImmValRotate(NumBytes); |
| 937 | unsigned ThisVal = NumBytes & ARM_AM::rotr32(0xFF, RotAmt); |
| 938 | assert(ThisVal && "Didn't extract field correctly"); |
| 939 | |
| 940 | // We will handle these bits from offset, clear them. |
| 941 | NumBytes &= ~ThisVal; |
| 942 | |
| 943 | assert(ARM_AM::getSOImmVal(ThisVal) != -1 && "Bit extraction didn't work?"); |
| 944 | |
| 945 | // Build the new ADD / SUB. |
| 946 | unsigned Opc = isSub ? ARM::SUBri : ARM::ADDri; |
| 947 | BuildMI(MBB, MBBI, dl, TII.get(Opc), DestReg) |
| 948 | .addReg(BaseReg, RegState::Kill).addImm(ThisVal) |
| 949 | .addImm((unsigned)Pred).addReg(PredReg).addReg(0); |
| 950 | BaseReg = DestReg; |
| 951 | } |
| 952 | } |
| 953 | |
Evan Cheng | cdbb3f5 | 2009-08-27 01:23:50 +0000 | [diff] [blame] | 954 | bool llvm::rewriteARMFrameIndex(MachineInstr &MI, unsigned FrameRegIdx, |
| 955 | unsigned FrameReg, int &Offset, |
| 956 | const ARMBaseInstrInfo &TII) { |
Evan Cheng | 6495f63 | 2009-07-28 05:48:47 +0000 | [diff] [blame] | 957 | unsigned Opcode = MI.getOpcode(); |
| 958 | const TargetInstrDesc &Desc = MI.getDesc(); |
| 959 | unsigned AddrMode = (Desc.TSFlags & ARMII::AddrModeMask); |
| 960 | bool isSub = false; |
Jim Grosbach | 764ab52 | 2009-08-11 15:33:49 +0000 | [diff] [blame] | 961 | |
Evan Cheng | 6495f63 | 2009-07-28 05:48:47 +0000 | [diff] [blame] | 962 | // Memory operands in inline assembly always use AddrMode2. |
| 963 | if (Opcode == ARM::INLINEASM) |
| 964 | AddrMode = ARMII::AddrMode2; |
Jim Grosbach | 764ab52 | 2009-08-11 15:33:49 +0000 | [diff] [blame] | 965 | |
Evan Cheng | 6495f63 | 2009-07-28 05:48:47 +0000 | [diff] [blame] | 966 | if (Opcode == ARM::ADDri) { |
| 967 | Offset += MI.getOperand(FrameRegIdx+1).getImm(); |
| 968 | if (Offset == 0) { |
| 969 | // Turn it into a move. |
| 970 | MI.setDesc(TII.get(ARM::MOVr)); |
| 971 | MI.getOperand(FrameRegIdx).ChangeToRegister(FrameReg, false); |
| 972 | MI.RemoveOperand(FrameRegIdx+1); |
Evan Cheng | cdbb3f5 | 2009-08-27 01:23:50 +0000 | [diff] [blame] | 973 | Offset = 0; |
| 974 | return true; |
Evan Cheng | 6495f63 | 2009-07-28 05:48:47 +0000 | [diff] [blame] | 975 | } else if (Offset < 0) { |
| 976 | Offset = -Offset; |
| 977 | isSub = true; |
| 978 | MI.setDesc(TII.get(ARM::SUBri)); |
| 979 | } |
| 980 | |
| 981 | // Common case: small offset, fits into instruction. |
| 982 | if (ARM_AM::getSOImmVal(Offset) != -1) { |
| 983 | // Replace the FrameIndex with sp / fp |
| 984 | MI.getOperand(FrameRegIdx).ChangeToRegister(FrameReg, false); |
| 985 | MI.getOperand(FrameRegIdx+1).ChangeToImmediate(Offset); |
Evan Cheng | cdbb3f5 | 2009-08-27 01:23:50 +0000 | [diff] [blame] | 986 | Offset = 0; |
| 987 | return true; |
Evan Cheng | 6495f63 | 2009-07-28 05:48:47 +0000 | [diff] [blame] | 988 | } |
| 989 | |
| 990 | // Otherwise, pull as much of the immedidate into this ADDri/SUBri |
| 991 | // as possible. |
| 992 | unsigned RotAmt = ARM_AM::getSOImmValRotate(Offset); |
| 993 | unsigned ThisImmVal = Offset & ARM_AM::rotr32(0xFF, RotAmt); |
| 994 | |
| 995 | // We will handle these bits from offset, clear them. |
| 996 | Offset &= ~ThisImmVal; |
| 997 | |
| 998 | // Get the properly encoded SOImmVal field. |
| 999 | assert(ARM_AM::getSOImmVal(ThisImmVal) != -1 && |
| 1000 | "Bit extraction didn't work?"); |
| 1001 | MI.getOperand(FrameRegIdx+1).ChangeToImmediate(ThisImmVal); |
| 1002 | } else { |
| 1003 | unsigned ImmIdx = 0; |
| 1004 | int InstrOffs = 0; |
| 1005 | unsigned NumBits = 0; |
| 1006 | unsigned Scale = 1; |
| 1007 | switch (AddrMode) { |
| 1008 | case ARMII::AddrMode2: { |
| 1009 | ImmIdx = FrameRegIdx+2; |
| 1010 | InstrOffs = ARM_AM::getAM2Offset(MI.getOperand(ImmIdx).getImm()); |
| 1011 | if (ARM_AM::getAM2Op(MI.getOperand(ImmIdx).getImm()) == ARM_AM::sub) |
| 1012 | InstrOffs *= -1; |
| 1013 | NumBits = 12; |
| 1014 | break; |
| 1015 | } |
| 1016 | case ARMII::AddrMode3: { |
| 1017 | ImmIdx = FrameRegIdx+2; |
| 1018 | InstrOffs = ARM_AM::getAM3Offset(MI.getOperand(ImmIdx).getImm()); |
| 1019 | if (ARM_AM::getAM3Op(MI.getOperand(ImmIdx).getImm()) == ARM_AM::sub) |
| 1020 | InstrOffs *= -1; |
| 1021 | NumBits = 8; |
| 1022 | break; |
| 1023 | } |
Anton Korobeynikov | baf3108 | 2009-08-08 13:35:48 +0000 | [diff] [blame] | 1024 | case ARMII::AddrMode4: |
Evan Cheng | cdbb3f5 | 2009-08-27 01:23:50 +0000 | [diff] [blame] | 1025 | // Can't fold any offset even if it's zero. |
| 1026 | return false; |
Evan Cheng | 6495f63 | 2009-07-28 05:48:47 +0000 | [diff] [blame] | 1027 | case ARMII::AddrMode5: { |
| 1028 | ImmIdx = FrameRegIdx+1; |
| 1029 | InstrOffs = ARM_AM::getAM5Offset(MI.getOperand(ImmIdx).getImm()); |
| 1030 | if (ARM_AM::getAM5Op(MI.getOperand(ImmIdx).getImm()) == ARM_AM::sub) |
| 1031 | InstrOffs *= -1; |
| 1032 | NumBits = 8; |
| 1033 | Scale = 4; |
| 1034 | break; |
| 1035 | } |
| 1036 | default: |
| 1037 | llvm_unreachable("Unsupported addressing mode!"); |
| 1038 | break; |
| 1039 | } |
| 1040 | |
| 1041 | Offset += InstrOffs * Scale; |
| 1042 | assert((Offset & (Scale-1)) == 0 && "Can't encode this offset!"); |
| 1043 | if (Offset < 0) { |
| 1044 | Offset = -Offset; |
| 1045 | isSub = true; |
| 1046 | } |
| 1047 | |
| 1048 | // Attempt to fold address comp. if opcode has offset bits |
| 1049 | if (NumBits > 0) { |
| 1050 | // Common case: small offset, fits into instruction. |
| 1051 | MachineOperand &ImmOp = MI.getOperand(ImmIdx); |
| 1052 | int ImmedOffset = Offset / Scale; |
| 1053 | unsigned Mask = (1 << NumBits) - 1; |
| 1054 | if ((unsigned)Offset <= Mask * Scale) { |
| 1055 | // Replace the FrameIndex with sp |
| 1056 | MI.getOperand(FrameRegIdx).ChangeToRegister(FrameReg, false); |
| 1057 | if (isSub) |
| 1058 | ImmedOffset |= 1 << NumBits; |
| 1059 | ImmOp.ChangeToImmediate(ImmedOffset); |
Evan Cheng | cdbb3f5 | 2009-08-27 01:23:50 +0000 | [diff] [blame] | 1060 | Offset = 0; |
| 1061 | return true; |
Evan Cheng | 6495f63 | 2009-07-28 05:48:47 +0000 | [diff] [blame] | 1062 | } |
Jim Grosbach | 764ab52 | 2009-08-11 15:33:49 +0000 | [diff] [blame] | 1063 | |
Evan Cheng | 6495f63 | 2009-07-28 05:48:47 +0000 | [diff] [blame] | 1064 | // Otherwise, it didn't fit. Pull in what we can to simplify the immed. |
| 1065 | ImmedOffset = ImmedOffset & Mask; |
| 1066 | if (isSub) |
| 1067 | ImmedOffset |= 1 << NumBits; |
| 1068 | ImmOp.ChangeToImmediate(ImmedOffset); |
| 1069 | Offset &= ~(Mask*Scale); |
| 1070 | } |
| 1071 | } |
| 1072 | |
Evan Cheng | cdbb3f5 | 2009-08-27 01:23:50 +0000 | [diff] [blame] | 1073 | Offset = (isSub) ? -Offset : Offset; |
| 1074 | return Offset == 0; |
Evan Cheng | 6495f63 | 2009-07-28 05:48:47 +0000 | [diff] [blame] | 1075 | } |