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" |
| 19 | #include "llvm/ADT/STLExtras.h" |
| 20 | #include "llvm/CodeGen/LiveVariables.h" |
| 21 | #include "llvm/CodeGen/MachineFrameInfo.h" |
| 22 | #include "llvm/CodeGen/MachineInstrBuilder.h" |
| 23 | #include "llvm/CodeGen/MachineJumpTableInfo.h" |
| 24 | #include "llvm/Target/TargetAsmInfo.h" |
| 25 | #include "llvm/Support/CommandLine.h" |
Torok Edwin | c25e758 | 2009-07-11 20:10:48 +0000 | [diff] [blame] | 26 | #include "llvm/Support/ErrorHandling.h" |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 27 | using namespace llvm; |
| 28 | |
| 29 | static cl::opt<bool> |
| 30 | EnableARM3Addr("enable-arm-3-addr-conv", cl::Hidden, |
| 31 | cl::desc("Enable ARM 2-addr to 3-addr conv")); |
| 32 | |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 33 | ARMBaseInstrInfo::ARMBaseInstrInfo(const ARMSubtarget &sti) |
| 34 | : TargetInstrInfoImpl(ARMInsts, array_lengthof(ARMInsts)), |
| 35 | STI(sti) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 36 | } |
| 37 | |
| 38 | MachineInstr * |
| 39 | ARMBaseInstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI, |
| 40 | MachineBasicBlock::iterator &MBBI, |
| 41 | LiveVariables *LV) const { |
Evan Cheng | 78703dd | 2009-07-27 18:44:00 +0000 | [diff] [blame^] | 42 | // FIXME: Thumb2 support. |
| 43 | |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 44 | if (!EnableARM3Addr) |
| 45 | return NULL; |
| 46 | |
| 47 | MachineInstr *MI = MBBI; |
| 48 | MachineFunction &MF = *MI->getParent()->getParent(); |
| 49 | unsigned TSFlags = MI->getDesc().TSFlags; |
| 50 | bool isPre = false; |
| 51 | switch ((TSFlags & ARMII::IndexModeMask) >> ARMII::IndexModeShift) { |
| 52 | default: return NULL; |
| 53 | case ARMII::IndexModePre: |
| 54 | isPre = true; |
| 55 | break; |
| 56 | case ARMII::IndexModePost: |
| 57 | break; |
| 58 | } |
| 59 | |
| 60 | // Try splitting an indexed load/store to an un-indexed one plus an add/sub |
| 61 | // operation. |
| 62 | unsigned MemOpc = getUnindexedOpcode(MI->getOpcode()); |
| 63 | if (MemOpc == 0) |
| 64 | return NULL; |
| 65 | |
| 66 | MachineInstr *UpdateMI = NULL; |
| 67 | MachineInstr *MemMI = NULL; |
| 68 | unsigned AddrMode = (TSFlags & ARMII::AddrModeMask); |
| 69 | const TargetInstrDesc &TID = MI->getDesc(); |
| 70 | unsigned NumOps = TID.getNumOperands(); |
| 71 | bool isLoad = !TID.mayStore(); |
| 72 | const MachineOperand &WB = isLoad ? MI->getOperand(1) : MI->getOperand(0); |
| 73 | const MachineOperand &Base = MI->getOperand(2); |
| 74 | const MachineOperand &Offset = MI->getOperand(NumOps-3); |
| 75 | unsigned WBReg = WB.getReg(); |
| 76 | unsigned BaseReg = Base.getReg(); |
| 77 | unsigned OffReg = Offset.getReg(); |
| 78 | unsigned OffImm = MI->getOperand(NumOps-2).getImm(); |
| 79 | ARMCC::CondCodes Pred = (ARMCC::CondCodes)MI->getOperand(NumOps-1).getImm(); |
| 80 | switch (AddrMode) { |
| 81 | default: |
| 82 | assert(false && "Unknown indexed op!"); |
| 83 | return NULL; |
| 84 | case ARMII::AddrMode2: { |
| 85 | bool isSub = ARM_AM::getAM2Op(OffImm) == ARM_AM::sub; |
| 86 | unsigned Amt = ARM_AM::getAM2Offset(OffImm); |
| 87 | if (OffReg == 0) { |
Evan Cheng | e7cbe41 | 2009-07-08 21:03:57 +0000 | [diff] [blame] | 88 | if (ARM_AM::getSOImmVal(Amt) == -1) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 89 | // Can't encode it in a so_imm operand. This transformation will |
| 90 | // add more than 1 instruction. Abandon! |
| 91 | return NULL; |
| 92 | UpdateMI = BuildMI(MF, MI->getDebugLoc(), |
Evan Cheng | 78703dd | 2009-07-27 18:44:00 +0000 | [diff] [blame^] | 93 | get(isSub ? ARM::SUBri : ARM::ADDri), WBReg) |
Evan Cheng | e7cbe41 | 2009-07-08 21:03:57 +0000 | [diff] [blame] | 94 | .addReg(BaseReg).addImm(Amt) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 95 | .addImm(Pred).addReg(0).addReg(0); |
| 96 | } else if (Amt != 0) { |
| 97 | ARM_AM::ShiftOpc ShOpc = ARM_AM::getAM2ShiftOpc(OffImm); |
| 98 | unsigned SOOpc = ARM_AM::getSORegOpc(ShOpc, Amt); |
| 99 | UpdateMI = BuildMI(MF, MI->getDebugLoc(), |
Evan Cheng | 78703dd | 2009-07-27 18:44:00 +0000 | [diff] [blame^] | 100 | get(isSub ? ARM::SUBrs : ARM::ADDrs), WBReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 101 | .addReg(BaseReg).addReg(OffReg).addReg(0).addImm(SOOpc) |
| 102 | .addImm(Pred).addReg(0).addReg(0); |
| 103 | } else |
| 104 | UpdateMI = BuildMI(MF, MI->getDebugLoc(), |
Evan Cheng | 78703dd | 2009-07-27 18:44:00 +0000 | [diff] [blame^] | 105 | get(isSub ? ARM::SUBrr : ARM::ADDrr), WBReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 106 | .addReg(BaseReg).addReg(OffReg) |
| 107 | .addImm(Pred).addReg(0).addReg(0); |
| 108 | break; |
| 109 | } |
| 110 | case ARMII::AddrMode3 : { |
| 111 | bool isSub = ARM_AM::getAM3Op(OffImm) == ARM_AM::sub; |
| 112 | unsigned Amt = ARM_AM::getAM3Offset(OffImm); |
| 113 | if (OffReg == 0) |
| 114 | // Immediate is 8-bits. It's guaranteed to fit in a so_imm operand. |
| 115 | UpdateMI = BuildMI(MF, MI->getDebugLoc(), |
Evan Cheng | 78703dd | 2009-07-27 18:44:00 +0000 | [diff] [blame^] | 116 | get(isSub ? ARM::SUBri : ARM::ADDri), WBReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 117 | .addReg(BaseReg).addImm(Amt) |
| 118 | .addImm(Pred).addReg(0).addReg(0); |
| 119 | else |
| 120 | UpdateMI = BuildMI(MF, MI->getDebugLoc(), |
Evan Cheng | 78703dd | 2009-07-27 18:44:00 +0000 | [diff] [blame^] | 121 | get(isSub ? ARM::SUBrr : ARM::ADDrr), WBReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 122 | .addReg(BaseReg).addReg(OffReg) |
| 123 | .addImm(Pred).addReg(0).addReg(0); |
| 124 | break; |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | std::vector<MachineInstr*> NewMIs; |
| 129 | if (isPre) { |
| 130 | if (isLoad) |
| 131 | MemMI = BuildMI(MF, MI->getDebugLoc(), |
| 132 | get(MemOpc), MI->getOperand(0).getReg()) |
| 133 | .addReg(WBReg).addReg(0).addImm(0).addImm(Pred); |
| 134 | else |
| 135 | MemMI = BuildMI(MF, MI->getDebugLoc(), |
| 136 | get(MemOpc)).addReg(MI->getOperand(1).getReg()) |
| 137 | .addReg(WBReg).addReg(0).addImm(0).addImm(Pred); |
| 138 | NewMIs.push_back(MemMI); |
| 139 | NewMIs.push_back(UpdateMI); |
| 140 | } else { |
| 141 | if (isLoad) |
| 142 | MemMI = BuildMI(MF, MI->getDebugLoc(), |
| 143 | get(MemOpc), MI->getOperand(0).getReg()) |
| 144 | .addReg(BaseReg).addReg(0).addImm(0).addImm(Pred); |
| 145 | else |
| 146 | MemMI = BuildMI(MF, MI->getDebugLoc(), |
| 147 | get(MemOpc)).addReg(MI->getOperand(1).getReg()) |
| 148 | .addReg(BaseReg).addReg(0).addImm(0).addImm(Pred); |
| 149 | if (WB.isDead()) |
| 150 | UpdateMI->getOperand(0).setIsDead(); |
| 151 | NewMIs.push_back(UpdateMI); |
| 152 | NewMIs.push_back(MemMI); |
| 153 | } |
| 154 | |
| 155 | // Transfer LiveVariables states, kill / dead info. |
| 156 | if (LV) { |
| 157 | for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) { |
| 158 | MachineOperand &MO = MI->getOperand(i); |
| 159 | if (MO.isReg() && MO.getReg() && |
| 160 | TargetRegisterInfo::isVirtualRegister(MO.getReg())) { |
| 161 | unsigned Reg = MO.getReg(); |
| 162 | |
| 163 | LiveVariables::VarInfo &VI = LV->getVarInfo(Reg); |
| 164 | if (MO.isDef()) { |
| 165 | MachineInstr *NewMI = (Reg == WBReg) ? UpdateMI : MemMI; |
| 166 | if (MO.isDead()) |
| 167 | LV->addVirtualRegisterDead(Reg, NewMI); |
| 168 | } |
| 169 | if (MO.isUse() && MO.isKill()) { |
| 170 | for (unsigned j = 0; j < 2; ++j) { |
| 171 | // Look at the two new MI's in reverse order. |
| 172 | MachineInstr *NewMI = NewMIs[j]; |
| 173 | if (!NewMI->readsRegister(Reg)) |
| 174 | continue; |
| 175 | LV->addVirtualRegisterKilled(Reg, NewMI); |
| 176 | if (VI.removeKill(MI)) |
| 177 | VI.Kills.push_back(NewMI); |
| 178 | break; |
| 179 | } |
| 180 | } |
| 181 | } |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | MFI->insert(MBBI, NewMIs[1]); |
| 186 | MFI->insert(MBBI, NewMIs[0]); |
| 187 | return NewMIs[0]; |
| 188 | } |
| 189 | |
| 190 | // Branch analysis. |
| 191 | bool |
| 192 | ARMBaseInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TBB, |
| 193 | MachineBasicBlock *&FBB, |
| 194 | SmallVectorImpl<MachineOperand> &Cond, |
| 195 | bool AllowModify) const { |
| 196 | // If the block has no terminators, it just falls into the block after it. |
| 197 | MachineBasicBlock::iterator I = MBB.end(); |
| 198 | if (I == MBB.begin() || !isUnpredicatedTerminator(--I)) |
| 199 | return false; |
| 200 | |
| 201 | // Get the last instruction in the block. |
| 202 | MachineInstr *LastInst = I; |
| 203 | |
| 204 | // If there is only one terminator instruction, process it. |
| 205 | unsigned LastOpc = LastInst->getOpcode(); |
| 206 | if (I == MBB.begin() || !isUnpredicatedTerminator(--I)) { |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 207 | if (isUncondBranchOpcode(LastOpc)) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 208 | TBB = LastInst->getOperand(0).getMBB(); |
| 209 | return false; |
| 210 | } |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 211 | if (isCondBranchOpcode(LastOpc)) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 212 | // Block ends with fall-through condbranch. |
| 213 | TBB = LastInst->getOperand(0).getMBB(); |
| 214 | Cond.push_back(LastInst->getOperand(1)); |
| 215 | Cond.push_back(LastInst->getOperand(2)); |
| 216 | return false; |
| 217 | } |
| 218 | return true; // Can't handle indirect branch. |
| 219 | } |
| 220 | |
| 221 | // Get the instruction before it if it is a terminator. |
| 222 | MachineInstr *SecondLastInst = I; |
| 223 | |
| 224 | // If there are three terminators, we don't know what sort of block this is. |
| 225 | if (SecondLastInst && I != MBB.begin() && isUnpredicatedTerminator(--I)) |
| 226 | return true; |
| 227 | |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 228 | // If the block ends with a B and a Bcc, handle it. |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 229 | unsigned SecondLastOpc = SecondLastInst->getOpcode(); |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 230 | if (isCondBranchOpcode(SecondLastOpc) && isUncondBranchOpcode(LastOpc)) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 231 | TBB = SecondLastInst->getOperand(0).getMBB(); |
| 232 | Cond.push_back(SecondLastInst->getOperand(1)); |
| 233 | Cond.push_back(SecondLastInst->getOperand(2)); |
| 234 | FBB = LastInst->getOperand(0).getMBB(); |
| 235 | return false; |
| 236 | } |
| 237 | |
| 238 | // If the block ends with two unconditional branches, handle it. The second |
| 239 | // one is not executed, so remove it. |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 240 | if (isUncondBranchOpcode(SecondLastOpc) && isUncondBranchOpcode(LastOpc)) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 241 | TBB = SecondLastInst->getOperand(0).getMBB(); |
| 242 | I = LastInst; |
| 243 | if (AllowModify) |
| 244 | I->eraseFromParent(); |
| 245 | return false; |
| 246 | } |
| 247 | |
| 248 | // ...likewise if it ends with a branch table followed by an unconditional |
| 249 | // branch. The branch folder can create these, and we must get rid of them for |
| 250 | // correctness of Thumb constant islands. |
Evan Cheng | 83e0e36 | 2009-07-27 18:25:24 +0000 | [diff] [blame] | 251 | if (isJumpTableBranchOpcode(SecondLastOpc) && |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 252 | isUncondBranchOpcode(LastOpc)) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 253 | I = LastInst; |
| 254 | if (AllowModify) |
| 255 | I->eraseFromParent(); |
| 256 | return true; |
| 257 | } |
| 258 | |
| 259 | // Otherwise, can't handle this. |
| 260 | return true; |
| 261 | } |
| 262 | |
| 263 | |
| 264 | unsigned ARMBaseInstrInfo::RemoveBranch(MachineBasicBlock &MBB) const { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 265 | MachineBasicBlock::iterator I = MBB.end(); |
| 266 | if (I == MBB.begin()) return 0; |
| 267 | --I; |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 268 | if (!isUncondBranchOpcode(I->getOpcode()) && |
| 269 | !isCondBranchOpcode(I->getOpcode())) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 270 | return 0; |
| 271 | |
| 272 | // Remove the branch. |
| 273 | I->eraseFromParent(); |
| 274 | |
| 275 | I = MBB.end(); |
| 276 | |
| 277 | if (I == MBB.begin()) return 1; |
| 278 | --I; |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 279 | if (!isCondBranchOpcode(I->getOpcode())) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 280 | return 1; |
| 281 | |
| 282 | // Remove the branch. |
| 283 | I->eraseFromParent(); |
| 284 | return 2; |
| 285 | } |
| 286 | |
| 287 | unsigned |
| 288 | ARMBaseInstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB, |
| 289 | MachineBasicBlock *FBB, |
| 290 | const SmallVectorImpl<MachineOperand> &Cond) const { |
| 291 | // FIXME this should probably have a DebugLoc argument |
| 292 | DebugLoc dl = DebugLoc::getUnknownLoc(); |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 293 | int BOpc = !STI.isThumb() |
| 294 | ? ARM::B : (STI.isThumb2() ? ARM::t2B : ARM::tB); |
| 295 | int BccOpc = !STI.isThumb() |
| 296 | ? ARM::Bcc : (STI.isThumb2() ? ARM::t2Bcc : ARM::tBcc); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 297 | |
| 298 | // Shouldn't be a fall through. |
| 299 | assert(TBB && "InsertBranch must not be told to insert a fallthrough"); |
| 300 | assert((Cond.size() == 2 || Cond.size() == 0) && |
| 301 | "ARM branch conditions have two components!"); |
| 302 | |
| 303 | if (FBB == 0) { |
| 304 | if (Cond.empty()) // Unconditional branch? |
| 305 | BuildMI(&MBB, dl, get(BOpc)).addMBB(TBB); |
| 306 | else |
| 307 | BuildMI(&MBB, dl, get(BccOpc)).addMBB(TBB) |
| 308 | .addImm(Cond[0].getImm()).addReg(Cond[1].getReg()); |
| 309 | return 1; |
| 310 | } |
| 311 | |
| 312 | // Two-way conditional branch. |
| 313 | BuildMI(&MBB, dl, get(BccOpc)).addMBB(TBB) |
| 314 | .addImm(Cond[0].getImm()).addReg(Cond[1].getReg()); |
| 315 | BuildMI(&MBB, dl, get(BOpc)).addMBB(FBB); |
| 316 | return 2; |
| 317 | } |
| 318 | |
| 319 | bool ARMBaseInstrInfo:: |
| 320 | ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const { |
| 321 | ARMCC::CondCodes CC = (ARMCC::CondCodes)(int)Cond[0].getImm(); |
| 322 | Cond[0].setImm(ARMCC::getOppositeCondition(CC)); |
| 323 | return false; |
| 324 | } |
| 325 | |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 326 | bool ARMBaseInstrInfo:: |
| 327 | PredicateInstruction(MachineInstr *MI, |
| 328 | const SmallVectorImpl<MachineOperand> &Pred) const { |
| 329 | unsigned Opc = MI->getOpcode(); |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 330 | if (isUncondBranchOpcode(Opc)) { |
| 331 | MI->setDesc(get(getMatchingCondBranchOpcode(Opc))); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 332 | MI->addOperand(MachineOperand::CreateImm(Pred[0].getImm())); |
| 333 | MI->addOperand(MachineOperand::CreateReg(Pred[1].getReg(), false)); |
| 334 | return true; |
| 335 | } |
| 336 | |
| 337 | int PIdx = MI->findFirstPredOperandIdx(); |
| 338 | if (PIdx != -1) { |
| 339 | MachineOperand &PMO = MI->getOperand(PIdx); |
| 340 | PMO.setImm(Pred[0].getImm()); |
| 341 | MI->getOperand(PIdx+1).setReg(Pred[1].getReg()); |
| 342 | return true; |
| 343 | } |
| 344 | return false; |
| 345 | } |
| 346 | |
| 347 | bool ARMBaseInstrInfo:: |
| 348 | SubsumesPredicate(const SmallVectorImpl<MachineOperand> &Pred1, |
| 349 | const SmallVectorImpl<MachineOperand> &Pred2) const { |
| 350 | if (Pred1.size() > 2 || Pred2.size() > 2) |
| 351 | return false; |
| 352 | |
| 353 | ARMCC::CondCodes CC1 = (ARMCC::CondCodes)Pred1[0].getImm(); |
| 354 | ARMCC::CondCodes CC2 = (ARMCC::CondCodes)Pred2[0].getImm(); |
| 355 | if (CC1 == CC2) |
| 356 | return true; |
| 357 | |
| 358 | switch (CC1) { |
| 359 | default: |
| 360 | return false; |
| 361 | case ARMCC::AL: |
| 362 | return true; |
| 363 | case ARMCC::HS: |
| 364 | return CC2 == ARMCC::HI; |
| 365 | case ARMCC::LS: |
| 366 | return CC2 == ARMCC::LO || CC2 == ARMCC::EQ; |
| 367 | case ARMCC::GE: |
| 368 | return CC2 == ARMCC::GT; |
| 369 | case ARMCC::LE: |
| 370 | return CC2 == ARMCC::LT; |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | bool ARMBaseInstrInfo::DefinesPredicate(MachineInstr *MI, |
| 375 | std::vector<MachineOperand> &Pred) const { |
| 376 | const TargetInstrDesc &TID = MI->getDesc(); |
| 377 | if (!TID.getImplicitDefs() && !TID.hasOptionalDef()) |
| 378 | return false; |
| 379 | |
| 380 | bool Found = false; |
| 381 | for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) { |
| 382 | const MachineOperand &MO = MI->getOperand(i); |
| 383 | if (MO.isReg() && MO.getReg() == ARM::CPSR) { |
| 384 | Pred.push_back(MO); |
| 385 | Found = true; |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | return Found; |
| 390 | } |
| 391 | |
| 392 | |
| 393 | /// FIXME: Works around a gcc miscompilation with -fstrict-aliasing |
| 394 | static unsigned getNumJTEntries(const std::vector<MachineJumpTableEntry> &JT, |
| 395 | unsigned JTI) DISABLE_INLINE; |
| 396 | static unsigned getNumJTEntries(const std::vector<MachineJumpTableEntry> &JT, |
| 397 | unsigned JTI) { |
| 398 | return JT[JTI].MBBs.size(); |
| 399 | } |
| 400 | |
| 401 | /// GetInstSize - Return the size of the specified MachineInstr. |
| 402 | /// |
| 403 | unsigned ARMBaseInstrInfo::GetInstSizeInBytes(const MachineInstr *MI) const { |
| 404 | const MachineBasicBlock &MBB = *MI->getParent(); |
| 405 | const MachineFunction *MF = MBB.getParent(); |
| 406 | const TargetAsmInfo *TAI = MF->getTarget().getTargetAsmInfo(); |
| 407 | |
| 408 | // Basic size info comes from the TSFlags field. |
| 409 | const TargetInstrDesc &TID = MI->getDesc(); |
| 410 | unsigned TSFlags = TID.TSFlags; |
| 411 | |
| 412 | switch ((TSFlags & ARMII::SizeMask) >> ARMII::SizeShift) { |
| 413 | default: { |
| 414 | // If this machine instr is an inline asm, measure it. |
| 415 | if (MI->getOpcode() == ARM::INLINEASM) |
| 416 | return TAI->getInlineAsmLength(MI->getOperand(0).getSymbolName()); |
| 417 | if (MI->isLabel()) |
| 418 | return 0; |
| 419 | switch (MI->getOpcode()) { |
| 420 | default: |
Torok Edwin | c23197a | 2009-07-14 16:55:14 +0000 | [diff] [blame] | 421 | llvm_unreachable("Unknown or unset size field for instr!"); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 422 | case TargetInstrInfo::IMPLICIT_DEF: |
| 423 | case TargetInstrInfo::DECLARE: |
| 424 | case TargetInstrInfo::DBG_LABEL: |
| 425 | case TargetInstrInfo::EH_LABEL: |
| 426 | return 0; |
| 427 | } |
| 428 | break; |
| 429 | } |
Evan Cheng | 7894762 | 2009-07-24 18:20:44 +0000 | [diff] [blame] | 430 | case ARMII::Size8Bytes: return 8; // ARM instruction x 2. |
| 431 | case ARMII::Size4Bytes: return 4; // ARM / Thumb2 instruction. |
| 432 | case ARMII::Size2Bytes: return 2; // Thumb1 instruction. |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 433 | case ARMII::SizeSpecial: { |
Evan Cheng | 7894762 | 2009-07-24 18:20:44 +0000 | [diff] [blame] | 434 | bool IsThumb1JT = false; |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 435 | switch (MI->getOpcode()) { |
| 436 | case ARM::CONSTPOOL_ENTRY: |
| 437 | // If this machine instr is a constant pool entry, its size is recorded as |
| 438 | // operand #2. |
| 439 | return MI->getOperand(2).getImm(); |
Evan Cheng | 7894762 | 2009-07-24 18:20:44 +0000 | [diff] [blame] | 440 | case ARM::Int_eh_sjlj_setjmp: |
| 441 | return 12; |
| 442 | case ARM::tBR_JTr: |
| 443 | IsThumb1JT = true; |
| 444 | // Fallthrough |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 445 | case ARM::BR_JTr: |
| 446 | case ARM::BR_JTm: |
| 447 | case ARM::BR_JTadd: |
Evan Cheng | 66ac531 | 2009-07-25 00:33:29 +0000 | [diff] [blame] | 448 | case ARM::t2BR_JT: { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 449 | // These are jumptable branches, i.e. a branch followed by an inlined |
| 450 | // jumptable. The size is 4 + 4 * number of entries. |
| 451 | unsigned NumOps = TID.getNumOperands(); |
| 452 | MachineOperand JTOP = |
| 453 | MI->getOperand(NumOps - (TID.isPredicable() ? 3 : 2)); |
| 454 | unsigned JTI = JTOP.getIndex(); |
| 455 | const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo(); |
| 456 | const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables(); |
| 457 | assert(JTI < JT.size()); |
| 458 | // Thumb instructions are 2 byte aligned, but JT entries are 4 byte |
| 459 | // 4 aligned. The assembler / linker may add 2 byte padding just before |
| 460 | // the JT entries. The size does not include this padding; the |
| 461 | // constant islands pass does separate bookkeeping for it. |
| 462 | // FIXME: If we know the size of the function is less than (1 << 16) *2 |
| 463 | // bytes, we can use 16-bit entries instead. Then there won't be an |
| 464 | // alignment issue. |
Evan Cheng | 7894762 | 2009-07-24 18:20:44 +0000 | [diff] [blame] | 465 | return getNumJTEntries(JT, JTI) * 4 + (IsThumb1JT ? 2 : 4); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 466 | } |
| 467 | default: |
| 468 | // Otherwise, pseudo-instruction sizes are zero. |
| 469 | return 0; |
| 470 | } |
| 471 | } |
| 472 | } |
| 473 | return 0; // Not reached |
| 474 | } |
| 475 | |
| 476 | /// Return true if the instruction is a register to register move and |
| 477 | /// leave the source and dest operands in the passed parameters. |
| 478 | /// |
| 479 | bool |
| 480 | ARMBaseInstrInfo::isMoveInstr(const MachineInstr &MI, |
| 481 | unsigned &SrcReg, unsigned &DstReg, |
| 482 | unsigned& SrcSubIdx, unsigned& DstSubIdx) const { |
| 483 | SrcSubIdx = DstSubIdx = 0; // No sub-registers. |
| 484 | |
Evan Cheng | 68e3c6a | 2009-07-27 00:05:15 +0000 | [diff] [blame] | 485 | switch (MI.getOpcode()) { |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 486 | default: break; |
Evan Cheng | 68e3c6a | 2009-07-27 00:05:15 +0000 | [diff] [blame] | 487 | case ARM::FCPYS: |
| 488 | case ARM::FCPYD: |
| 489 | case ARM::VMOVD: |
| 490 | case ARM::VMOVQ: { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 491 | SrcReg = MI.getOperand(1).getReg(); |
| 492 | DstReg = MI.getOperand(0).getReg(); |
| 493 | return true; |
| 494 | } |
Evan Cheng | 68e3c6a | 2009-07-27 00:05:15 +0000 | [diff] [blame] | 495 | case ARM::MOVr: |
| 496 | case ARM::tMOVr: |
| 497 | case ARM::tMOVgpr2tgpr: |
| 498 | case ARM::tMOVtgpr2gpr: |
| 499 | case ARM::tMOVgpr2gpr: |
| 500 | case ARM::t2MOVr: { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 501 | assert(MI.getDesc().getNumOperands() >= 2 && |
| 502 | MI.getOperand(0).isReg() && |
| 503 | MI.getOperand(1).isReg() && |
| 504 | "Invalid ARM MOV instruction"); |
| 505 | SrcReg = MI.getOperand(1).getReg(); |
| 506 | DstReg = MI.getOperand(0).getReg(); |
| 507 | return true; |
| 508 | } |
Evan Cheng | 68e3c6a | 2009-07-27 00:05:15 +0000 | [diff] [blame] | 509 | } |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 510 | |
| 511 | return false; |
| 512 | } |
| 513 | |
| 514 | unsigned |
| 515 | ARMBaseInstrInfo::isLoadFromStackSlot(const MachineInstr *MI, |
| 516 | int &FrameIndex) const { |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 517 | switch (MI->getOpcode()) { |
| 518 | default: break; |
| 519 | case ARM::LDR: |
| 520 | case ARM::t2LDRs: // FIXME: don't use t2LDRs to access frame. |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 521 | if (MI->getOperand(1).isFI() && |
| 522 | MI->getOperand(2).isReg() && |
| 523 | MI->getOperand(3).isImm() && |
| 524 | MI->getOperand(2).getReg() == 0 && |
| 525 | MI->getOperand(3).getImm() == 0) { |
| 526 | FrameIndex = MI->getOperand(1).getIndex(); |
| 527 | return MI->getOperand(0).getReg(); |
| 528 | } |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 529 | break; |
| 530 | case ARM::t2LDRi12: |
| 531 | case ARM::tRestore: |
David Goodwin | 5ff58b5 | 2009-07-24 00:16:18 +0000 | [diff] [blame] | 532 | if (MI->getOperand(1).isFI() && |
| 533 | MI->getOperand(2).isImm() && |
| 534 | MI->getOperand(2).getImm() == 0) { |
| 535 | FrameIndex = MI->getOperand(1).getIndex(); |
| 536 | return MI->getOperand(0).getReg(); |
| 537 | } |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 538 | break; |
| 539 | case ARM::FLDD: |
| 540 | case ARM::FLDS: |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 541 | if (MI->getOperand(1).isFI() && |
| 542 | MI->getOperand(2).isImm() && |
| 543 | MI->getOperand(2).getImm() == 0) { |
| 544 | FrameIndex = MI->getOperand(1).getIndex(); |
| 545 | return MI->getOperand(0).getReg(); |
| 546 | } |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 547 | break; |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 548 | } |
| 549 | |
| 550 | return 0; |
| 551 | } |
| 552 | |
| 553 | unsigned |
| 554 | ARMBaseInstrInfo::isStoreToStackSlot(const MachineInstr *MI, |
| 555 | int &FrameIndex) const { |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 556 | switch (MI->getOpcode()) { |
| 557 | default: break; |
| 558 | case ARM::STR: |
| 559 | case ARM::t2STRs: // FIXME: don't use t2STRs to access frame. |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 560 | if (MI->getOperand(1).isFI() && |
| 561 | MI->getOperand(2).isReg() && |
| 562 | MI->getOperand(3).isImm() && |
| 563 | MI->getOperand(2).getReg() == 0 && |
| 564 | MI->getOperand(3).getImm() == 0) { |
| 565 | FrameIndex = MI->getOperand(1).getIndex(); |
| 566 | return MI->getOperand(0).getReg(); |
| 567 | } |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 568 | break; |
| 569 | case ARM::t2STRi12: |
| 570 | case ARM::tSpill: |
David Goodwin | 5ff58b5 | 2009-07-24 00:16:18 +0000 | [diff] [blame] | 571 | if (MI->getOperand(1).isFI() && |
| 572 | MI->getOperand(2).isImm() && |
| 573 | MI->getOperand(2).getImm() == 0) { |
| 574 | FrameIndex = MI->getOperand(1).getIndex(); |
| 575 | return MI->getOperand(0).getReg(); |
| 576 | } |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 577 | break; |
| 578 | case ARM::FSTD: |
| 579 | case ARM::FSTS: |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 580 | if (MI->getOperand(1).isFI() && |
| 581 | MI->getOperand(2).isImm() && |
| 582 | MI->getOperand(2).getImm() == 0) { |
| 583 | FrameIndex = MI->getOperand(1).getIndex(); |
| 584 | return MI->getOperand(0).getReg(); |
| 585 | } |
Evan Cheng | dced03f | 2009-07-27 00:24:36 +0000 | [diff] [blame] | 586 | break; |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 587 | } |
| 588 | |
| 589 | return 0; |
| 590 | } |
| 591 | |
| 592 | bool |
| 593 | ARMBaseInstrInfo::copyRegToReg(MachineBasicBlock &MBB, |
| 594 | MachineBasicBlock::iterator I, |
| 595 | unsigned DestReg, unsigned SrcReg, |
| 596 | const TargetRegisterClass *DestRC, |
| 597 | const TargetRegisterClass *SrcRC) const { |
| 598 | DebugLoc DL = DebugLoc::getUnknownLoc(); |
| 599 | if (I != MBB.end()) DL = I->getDebugLoc(); |
| 600 | |
| 601 | if (DestRC != SrcRC) { |
| 602 | // Not yet supported! |
| 603 | return false; |
| 604 | } |
| 605 | |
| 606 | if (DestRC == ARM::GPRRegisterClass) |
Evan Cheng | 08b93c6 | 2009-07-27 00:33:08 +0000 | [diff] [blame] | 607 | AddDefaultCC(AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::MOVr), |
Evan Cheng | dd6f632 | 2009-07-11 06:37:27 +0000 | [diff] [blame] | 608 | DestReg).addReg(SrcReg))); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 609 | else if (DestRC == ARM::SPRRegisterClass) |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 610 | AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::FCPYS), DestReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 611 | .addReg(SrcReg)); |
| 612 | else if (DestRC == ARM::DPRRegisterClass) |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 613 | AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::FCPYD), DestReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 614 | .addReg(SrcReg)); |
| 615 | else if (DestRC == ARM::QPRRegisterClass) |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 616 | BuildMI(MBB, I, DL, get(ARM::VMOVQ), DestReg).addReg(SrcReg); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 617 | else |
| 618 | return false; |
| 619 | |
| 620 | return true; |
| 621 | } |
| 622 | |
| 623 | void ARMBaseInstrInfo:: |
| 624 | storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I, |
| 625 | unsigned SrcReg, bool isKill, int FI, |
| 626 | const TargetRegisterClass *RC) const { |
| 627 | DebugLoc DL = DebugLoc::getUnknownLoc(); |
| 628 | if (I != MBB.end()) DL = I->getDebugLoc(); |
| 629 | |
| 630 | if (RC == ARM::GPRRegisterClass) { |
Evan Cheng | 5732ca0 | 2009-07-27 03:14:20 +0000 | [diff] [blame] | 631 | AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::STR)) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 632 | .addReg(SrcReg, getKillRegState(isKill)) |
| 633 | .addFrameIndex(FI).addReg(0).addImm(0)); |
| 634 | } else if (RC == ARM::DPRRegisterClass) { |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 635 | AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::FSTD)) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 636 | .addReg(SrcReg, getKillRegState(isKill)) |
| 637 | .addFrameIndex(FI).addImm(0)); |
| 638 | } else { |
| 639 | assert(RC == ARM::SPRRegisterClass && "Unknown regclass!"); |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 640 | AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::FSTS)) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 641 | .addReg(SrcReg, getKillRegState(isKill)) |
| 642 | .addFrameIndex(FI).addImm(0)); |
| 643 | } |
| 644 | } |
| 645 | |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 646 | void ARMBaseInstrInfo:: |
| 647 | loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I, |
| 648 | unsigned DestReg, int FI, |
| 649 | const TargetRegisterClass *RC) const { |
| 650 | DebugLoc DL = DebugLoc::getUnknownLoc(); |
| 651 | if (I != MBB.end()) DL = I->getDebugLoc(); |
| 652 | |
| 653 | if (RC == ARM::GPRRegisterClass) { |
Evan Cheng | 5732ca0 | 2009-07-27 03:14:20 +0000 | [diff] [blame] | 654 | AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::LDR), DestReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 655 | .addFrameIndex(FI).addReg(0).addImm(0)); |
| 656 | } else if (RC == ARM::DPRRegisterClass) { |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 657 | AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::FLDD), DestReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 658 | .addFrameIndex(FI).addImm(0)); |
| 659 | } else { |
| 660 | assert(RC == ARM::SPRRegisterClass && "Unknown regclass!"); |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 661 | AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::FLDS), DestReg) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 662 | .addFrameIndex(FI).addImm(0)); |
| 663 | } |
| 664 | } |
| 665 | |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 666 | MachineInstr *ARMBaseInstrInfo:: |
| 667 | foldMemoryOperandImpl(MachineFunction &MF, MachineInstr *MI, |
| 668 | const SmallVectorImpl<unsigned> &Ops, int FI) const { |
| 669 | if (Ops.size() != 1) return NULL; |
| 670 | |
| 671 | unsigned OpNum = Ops[0]; |
| 672 | unsigned Opc = MI->getOpcode(); |
| 673 | MachineInstr *NewMI = NULL; |
Evan Cheng | 5732ca0 | 2009-07-27 03:14:20 +0000 | [diff] [blame] | 674 | if (Opc == ARM::MOVr || Opc == ARM::t2MOVr) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 675 | // If it is updating CPSR, then it cannot be folded. |
Evan Cheng | 1f5c988 | 2009-07-27 04:18:04 +0000 | [diff] [blame] | 676 | if (MI->getOperand(4).getReg() != ARM::CPSR || MI->getOperand(4).isDead()) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 677 | unsigned Pred = MI->getOperand(2).getImm(); |
| 678 | unsigned PredReg = MI->getOperand(3).getReg(); |
| 679 | if (OpNum == 0) { // move -> store |
| 680 | unsigned SrcReg = MI->getOperand(1).getReg(); |
| 681 | bool isKill = MI->getOperand(1).isKill(); |
| 682 | bool isUndef = MI->getOperand(1).isUndef(); |
Evan Cheng | 5732ca0 | 2009-07-27 03:14:20 +0000 | [diff] [blame] | 683 | if (Opc == ARM::MOVr) |
| 684 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::STR)) |
| 685 | .addReg(SrcReg, getKillRegState(isKill) | getUndefRegState(isUndef)) |
| 686 | .addFrameIndex(FI).addReg(0).addImm(0).addImm(Pred).addReg(PredReg); |
| 687 | else // ARM::t2MOVr |
| 688 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::t2STRi12)) |
| 689 | .addReg(SrcReg, getKillRegState(isKill) | getUndefRegState(isUndef)) |
| 690 | .addFrameIndex(FI).addImm(0).addImm(Pred).addReg(PredReg); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 691 | } else { // move -> load |
| 692 | unsigned DstReg = MI->getOperand(0).getReg(); |
| 693 | bool isDead = MI->getOperand(0).isDead(); |
| 694 | bool isUndef = MI->getOperand(0).isUndef(); |
Evan Cheng | 5732ca0 | 2009-07-27 03:14:20 +0000 | [diff] [blame] | 695 | if (Opc == ARM::MOVr) |
| 696 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::LDR)) |
| 697 | .addReg(DstReg, |
| 698 | RegState::Define | |
| 699 | getDeadRegState(isDead) | |
| 700 | getUndefRegState(isUndef)) |
| 701 | .addFrameIndex(FI).addReg(0).addImm(0).addImm(Pred).addReg(PredReg); |
| 702 | else // ARM::t2MOVr |
| 703 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::t2LDRi12)) |
| 704 | .addReg(DstReg, |
| 705 | RegState::Define | |
| 706 | getDeadRegState(isDead) | |
| 707 | getUndefRegState(isUndef)) |
| 708 | .addFrameIndex(FI).addImm(0).addImm(Pred).addReg(PredReg); |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 709 | } |
| 710 | } |
| 711 | } |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 712 | else if (Opc == ARM::FCPYS) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 713 | unsigned Pred = MI->getOperand(2).getImm(); |
| 714 | unsigned PredReg = MI->getOperand(3).getReg(); |
| 715 | if (OpNum == 0) { // move -> store |
| 716 | unsigned SrcReg = MI->getOperand(1).getReg(); |
| 717 | bool isKill = MI->getOperand(1).isKill(); |
| 718 | bool isUndef = MI->getOperand(1).isUndef(); |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 719 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::FSTS)) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 720 | .addReg(SrcReg, getKillRegState(isKill) | getUndefRegState(isUndef)) |
| 721 | .addFrameIndex(FI) |
| 722 | .addImm(0).addImm(Pred).addReg(PredReg); |
| 723 | } else { // move -> load |
| 724 | unsigned DstReg = MI->getOperand(0).getReg(); |
| 725 | bool isDead = MI->getOperand(0).isDead(); |
| 726 | bool isUndef = MI->getOperand(0).isUndef(); |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 727 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::FLDS)) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 728 | .addReg(DstReg, |
| 729 | RegState::Define | |
| 730 | getDeadRegState(isDead) | |
| 731 | getUndefRegState(isUndef)) |
| 732 | .addFrameIndex(FI).addImm(0).addImm(Pred).addReg(PredReg); |
| 733 | } |
| 734 | } |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 735 | else if (Opc == ARM::FCPYD) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 736 | unsigned Pred = MI->getOperand(2).getImm(); |
| 737 | unsigned PredReg = MI->getOperand(3).getReg(); |
| 738 | if (OpNum == 0) { // move -> store |
| 739 | unsigned SrcReg = MI->getOperand(1).getReg(); |
| 740 | bool isKill = MI->getOperand(1).isKill(); |
| 741 | bool isUndef = MI->getOperand(1).isUndef(); |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 742 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::FSTD)) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 743 | .addReg(SrcReg, getKillRegState(isKill) | getUndefRegState(isUndef)) |
| 744 | .addFrameIndex(FI).addImm(0).addImm(Pred).addReg(PredReg); |
| 745 | } else { // move -> load |
| 746 | unsigned DstReg = MI->getOperand(0).getReg(); |
| 747 | bool isDead = MI->getOperand(0).isDead(); |
| 748 | bool isUndef = MI->getOperand(0).isUndef(); |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 749 | NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::FLDD)) |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 750 | .addReg(DstReg, |
| 751 | RegState::Define | |
| 752 | getDeadRegState(isDead) | |
| 753 | getUndefRegState(isUndef)) |
| 754 | .addFrameIndex(FI).addImm(0).addImm(Pred).addReg(PredReg); |
| 755 | } |
| 756 | } |
| 757 | |
| 758 | return NewMI; |
| 759 | } |
| 760 | |
| 761 | MachineInstr* |
| 762 | ARMBaseInstrInfo::foldMemoryOperandImpl(MachineFunction &MF, |
| 763 | MachineInstr* MI, |
| 764 | const SmallVectorImpl<unsigned> &Ops, |
| 765 | MachineInstr* LoadMI) const { |
Evan Cheng | 1f5c988 | 2009-07-27 04:18:04 +0000 | [diff] [blame] | 766 | // FIXME |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 767 | return 0; |
| 768 | } |
| 769 | |
| 770 | bool |
| 771 | ARMBaseInstrInfo::canFoldMemoryOperand(const MachineInstr *MI, |
| 772 | const SmallVectorImpl<unsigned> &Ops) const { |
| 773 | if (Ops.size() != 1) return false; |
| 774 | |
| 775 | unsigned Opc = MI->getOpcode(); |
Evan Cheng | 5732ca0 | 2009-07-27 03:14:20 +0000 | [diff] [blame] | 776 | if (Opc == ARM::MOVr || Opc == ARM::t2MOVr) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 777 | // If it is updating CPSR, then it cannot be folded. |
Evan Cheng | 1f5c988 | 2009-07-27 04:18:04 +0000 | [diff] [blame] | 778 | return MI->getOperand(4).getReg() != ARM::CPSR ||MI->getOperand(4).isDead(); |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 779 | } else if (Opc == ARM::FCPYS || Opc == ARM::FCPYD) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 780 | return true; |
Evan Cheng | b74bb1a | 2009-07-24 00:53:56 +0000 | [diff] [blame] | 781 | } else if (Opc == ARM::VMOVD || Opc == ARM::VMOVQ) { |
David Goodwin | 334c264 | 2009-07-08 16:09:28 +0000 | [diff] [blame] | 782 | return false; // FIXME |
| 783 | } |
| 784 | |
| 785 | return false; |
| 786 | } |
Evan Cheng | 5ca53a7 | 2009-07-27 18:20:05 +0000 | [diff] [blame] | 787 | |
| 788 | int ARMBaseInstrInfo::getMatchingCondBranchOpcode(int Opc) const { |
| 789 | if (Opc == ARM::B) |
| 790 | return ARM::Bcc; |
| 791 | else if (Opc == ARM::tB) |
| 792 | return ARM::tBcc; |
| 793 | else if (Opc == ARM::t2B) |
| 794 | return ARM::t2Bcc; |
| 795 | |
| 796 | llvm_unreachable("Unknown unconditional branch opcode!"); |
| 797 | return 0; |
| 798 | } |
| 799 | |