Switch ARM BR_JTm and BR_JTr instructions to be MC-expanded pseudos.

[oota-llvm.git] / lib / Target / ARM / Thumb1InstrInfo.cpp

diff --git a/lib/Target/ARM/Thumb1InstrInfo.cpp b/lib/Target/ARM/Thumb1InstrInfo.cpp
index c39bfeddf6bbc727a6fd2d2e349dfa35ab9189e6..3fbb43340c3fd8008743143b21f56916698e3f78 100644 (file)
--- a/lib/Target/ARM/Thumb1InstrInfo.cpp
+++ b/lib/Target/ARM/Thumb1InstrInfo.cpp
@@ -53,39 +53,6 @@ void Thumb1InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
          "Thumb1 can only copy GPR registers");
 }
 
-bool Thumb1InstrInfo::
-canFoldMemoryOperand(const MachineInstr *MI,
-                     const SmallVectorImpl<unsigned> &Ops) const {
-  if (Ops.size() != 1) return false;
-
-  unsigned OpNum = Ops[0];
-  unsigned Opc = MI->getOpcode();
-  switch (Opc) {
-  default: break;
-  case ARM::tMOVr:
-  case ARM::tMOVtgpr2gpr:
-  case ARM::tMOVgpr2tgpr:
-  case ARM::tMOVgpr2gpr: {
-    if (OpNum == 0) { // move -> store
-      unsigned SrcReg = MI->getOperand(1).getReg();
-      if (TargetRegisterInfo::isPhysicalRegister(SrcReg) &&
-          !isARMLowRegister(SrcReg))
-        // tSpill cannot take a high register operand.
-        return false;
-    } else {          // move -> load
-      unsigned DstReg = MI->getOperand(0).getReg();
-      if (TargetRegisterInfo::isPhysicalRegister(DstReg) &&
-          !isARMLowRegister(DstReg))
-        // tRestore cannot target a high register operand.
-        return false;
-    }
-    return true;
-  }
-  }
-
-  return false;
-}
-
 void Thumb1InstrInfo::
 storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                     unsigned SrcReg, bool isKill, int FI,
@@ -104,8 +71,9 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
     MachineFunction &MF = *MBB.getParent();
     MachineFrameInfo &MFI = *MF.getFrameInfo();
     MachineMemOperand *MMO =
-      MF.getMachineMemOperand(PseudoSourceValue::getFixedStack(FI),
-                              MachineMemOperand::MOStore, 0,
+      MF.getMachineMemOperand(
+                    MachinePointerInfo(PseudoSourceValue::getFixedStack(FI)),
+                              MachineMemOperand::MOStore,
                               MFI.getObjectSize(FI),
                               MFI.getObjectAlignment(FI));
     AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::tSpill))
@@ -132,128 +100,12 @@ loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
     MachineFunction &MF = *MBB.getParent();
     MachineFrameInfo &MFI = *MF.getFrameInfo();
     MachineMemOperand *MMO =
-      MF.getMachineMemOperand(PseudoSourceValue::getFixedStack(FI),
-                              MachineMemOperand::MOLoad, 0,
+      MF.getMachineMemOperand(
+                    MachinePointerInfo(PseudoSourceValue::getFixedStack(FI)),
+                              MachineMemOperand::MOLoad,
                               MFI.getObjectSize(FI),
                               MFI.getObjectAlignment(FI));
     AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::tRestore), DestReg)
                    .addFrameIndex(FI).addImm(0).addMemOperand(MMO));
   }
 }
-
-bool Thumb1InstrInfo::
-spillCalleeSavedRegisters(MachineBasicBlock &MBB,
-                          MachineBasicBlock::iterator MI,
-                          const std::vector<CalleeSavedInfo> &CSI,
-                          const TargetRegisterInfo *TRI) const {
-  if (CSI.empty())
-    return false;
-
-  DebugLoc DL;
-  if (MI != MBB.end()) DL = MI->getDebugLoc();
-
-  MachineInstrBuilder MIB = BuildMI(MBB, MI, DL, get(ARM::tPUSH));
-  AddDefaultPred(MIB);
-  for (unsigned i = CSI.size(); i != 0; --i) {
-    unsigned Reg = CSI[i-1].getReg();
-    bool isKill = true;
-
-    // Add the callee-saved register as live-in unless it's LR and
-    // @llvm.returnaddress is called. If LR is returned for @llvm.returnaddress
-    // then it's already added to the function and entry block live-in sets.
-    if (Reg == ARM::LR) {
-      MachineFunction &MF = *MBB.getParent();
-      if (MF.getFrameInfo()->isReturnAddressTaken() &&
-          MF.getRegInfo().isLiveIn(Reg))
-        isKill = false;
-    }
-
-    if (isKill)
-      MBB.addLiveIn(Reg);
-
-    MIB.addReg(Reg, getKillRegState(isKill));
-  }
-  return true;
-}
-
-bool Thumb1InstrInfo::
-restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
-                            MachineBasicBlock::iterator MI,
-                            const std::vector<CalleeSavedInfo> &CSI,
-                            const TargetRegisterInfo *TRI) const {
-  MachineFunction &MF = *MBB.getParent();
-  ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
-  if (CSI.empty())
-    return false;
-
-  bool isVarArg = AFI->getVarArgsRegSaveSize() > 0;
-  DebugLoc DL = MI->getDebugLoc();
-  MachineInstrBuilder MIB = BuildMI(MF, DL, get(ARM::tPOP));
-  AddDefaultPred(MIB);
-
-  bool NumRegs = false;
-  for (unsigned i = CSI.size(); i != 0; --i) {
-    unsigned Reg = CSI[i-1].getReg();
-    if (Reg == ARM::LR) {
-      // Special epilogue for vararg functions. See emitEpilogue
-      if (isVarArg)
-        continue;
-      Reg = ARM::PC;
-      (*MIB).setDesc(get(ARM::tPOP_RET));
-      MI = MBB.erase(MI);
-    }
-    MIB.addReg(Reg, getDefRegState(true));
-    NumRegs = true;
-  }
-
-  // It's illegal to emit pop instruction without operands.
-  if (NumRegs)
-    MBB.insert(MI, &*MIB);
-  else
-    MF.DeleteMachineInstr(MIB);
-
-  return true;
-}
-
-MachineInstr *Thumb1InstrInfo::
-foldMemoryOperandImpl(MachineFunction &MF, MachineInstr *MI,
-                      const SmallVectorImpl<unsigned> &Ops, int FI) const {
-  if (Ops.size() != 1) return NULL;
-
-  unsigned OpNum = Ops[0];
-  unsigned Opc = MI->getOpcode();
-  MachineInstr *NewMI = NULL;
-  switch (Opc) {
-  default: break;
-  case ARM::tMOVr:
-  case ARM::tMOVtgpr2gpr:
-  case ARM::tMOVgpr2tgpr:
-  case ARM::tMOVgpr2gpr: {
-    if (OpNum == 0) { // move -> store
-      unsigned SrcReg = MI->getOperand(1).getReg();
-      bool isKill = MI->getOperand(1).isKill();
-      if (TargetRegisterInfo::isPhysicalRegister(SrcReg) &&
-          !isARMLowRegister(SrcReg))
-        // tSpill cannot take a high register operand.
-        break;
-      NewMI = AddDefaultPred(BuildMI(MF, MI->getDebugLoc(), get(ARM::tSpill))
-                             .addReg(SrcReg, getKillRegState(isKill))
-                             .addFrameIndex(FI).addImm(0));
-    } else {          // move -> load
-      unsigned DstReg = MI->getOperand(0).getReg();
-      if (TargetRegisterInfo::isPhysicalRegister(DstReg) &&
-          !isARMLowRegister(DstReg))
-        // tRestore cannot target a high register operand.
-        break;
-      bool isDead = MI->getOperand(0).isDead();
-      NewMI = AddDefaultPred(BuildMI(MF, MI->getDebugLoc(), get(ARM::tRestore))
-                             .addReg(DstReg,
-                                     RegState::Define | getDeadRegState(isDead))
-                             .addFrameIndex(FI).addImm(0));
-    }
-    break;
-  }
-  }
-
-  return NewMI;
-}