From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Fri, 16 Jul 2010 22:35:46 +0000 (+0000)
Subject: Remove the isMoveInstr() hook.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=78e6e009223a38739797629ca2d217acf86dda93;p=oota-llvm.git

Remove the isMoveInstr() hook.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108567 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/docs/WritingAnLLVMBackend.html b/docs/WritingAnLLVMBackend.html
index 077dea0ed62..3301b017b1f 100644
--- a/docs/WritingAnLLVMBackend.html
+++ b/docs/WritingAnLLVMBackend.html
@@ -1299,9 +1299,6 @@ implementation in <tt>SparcInstrInfo.cpp</tt>:
 </p>
 
 <ul>
-<li><tt>isMoveInstr</tt> &mdash; Return true if the instruction is a register to
-    register move; false, otherwise.</li>
-
 <li><tt>isLoadFromStackSlot</tt> &mdash; If the specified machine instruction is
     a direct load from a stack slot, return the register number of the
     destination and the <tt>FrameIndex</tt> of the stack slot.</li>
diff --git a/include/llvm/Target/TargetInstrInfo.h b/include/llvm/Target/TargetInstrInfo.h
index 1181f98c338..776d679709a 100644
--- a/include/llvm/Target/TargetInstrInfo.h
+++ b/include/llvm/Target/TargetInstrInfo.h
@@ -92,15 +92,6 @@ private:
                                                 AliasAnalysis *AA) const;
 
 public:
-  /// isMoveInstr - Return true if the instruction is a register to register
-  /// move and return the source and dest operands and their sub-register
-  /// indices by reference.
-  virtual bool isMoveInstr(const MachineInstr& MI,
-                           unsigned& SrcReg, unsigned& DstReg,
-                           unsigned& SrcSubIdx, unsigned& DstSubIdx) const {
-    return false;
-  }
-
   /// isCoalescableExtInstr - Return true if the instruction is a "coalescable"
   /// extension instruction. That is, it's like a copy where it's legal for the
   /// source to overlap the destination. e.g. X86::MOVSX64rr32. If this returns
diff --git a/lib/Target/ARM/ARMBaseInstrInfo.cpp b/lib/Target/ARM/ARMBaseInstrInfo.cpp
index 7d19666f46d..a85a8e24fc0 100644
--- a/lib/Target/ARM/ARMBaseInstrInfo.cpp
+++ b/lib/Target/ARM/ARMBaseInstrInfo.cpp
@@ -573,48 +573,6 @@ unsigned ARMBaseInstrInfo::GetInstSizeInBytes(const MachineInstr *MI) const {
   return 0; // Not reached
 }
 
-/// Return true if the instruction is a register to register move and
-/// leave the source and dest operands in the passed parameters.
-///
-bool
-ARMBaseInstrInfo::isMoveInstr(const MachineInstr &MI,
-                              unsigned &SrcReg, unsigned &DstReg,
-                              unsigned& SrcSubIdx, unsigned& DstSubIdx) const {
-  switch (MI.getOpcode()) {
-  default: break;
-  case ARM::VMOVS:
-  case ARM::VMOVD:
-  case ARM::VMOVDneon:
-  case ARM::VMOVQ:
-  case ARM::VMOVQQ : {
-    SrcReg = MI.getOperand(1).getReg();
-    DstReg = MI.getOperand(0).getReg();
-    SrcSubIdx = MI.getOperand(1).getSubReg();
-    DstSubIdx = MI.getOperand(0).getSubReg();
-    return true;
-  }
-  case ARM::MOVr:
-  case ARM::MOVr_TC:
-  case ARM::tMOVr:
-  case ARM::tMOVgpr2tgpr:
-  case ARM::tMOVtgpr2gpr:
-  case ARM::tMOVgpr2gpr:
-  case ARM::t2MOVr: {
-    assert(MI.getDesc().getNumOperands() >= 2 &&
-           MI.getOperand(0).isReg() &&
-           MI.getOperand(1).isReg() &&
-           "Invalid ARM MOV instruction");
-    SrcReg = MI.getOperand(1).getReg();
-    DstReg = MI.getOperand(0).getReg();
-    SrcSubIdx = MI.getOperand(1).getSubReg();
-    DstSubIdx = MI.getOperand(0).getSubReg();
-    return true;
-  }
-  }
-
-  return false;
-}
-
 unsigned
 ARMBaseInstrInfo::isLoadFromStackSlot(const MachineInstr *MI,
                                       int &FrameIndex) const {
diff --git a/lib/Target/ARM/ARMBaseInstrInfo.h b/lib/Target/ARM/ARMBaseInstrInfo.h
index 89a2db74a75..7b6f3293156 100644
--- a/lib/Target/ARM/ARMBaseInstrInfo.h
+++ b/lib/Target/ARM/ARMBaseInstrInfo.h
@@ -262,12 +262,6 @@ public:
   ///
   virtual unsigned GetInstSizeInBytes(const MachineInstr* MI) const;
 
-  /// Return true if the instruction is a register to register move and return
-  /// the source and dest operands and their sub-register indices by reference.
-  virtual bool isMoveInstr(const MachineInstr &MI,
-                           unsigned &SrcReg, unsigned &DstReg,
-                           unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
-
   virtual unsigned isLoadFromStackSlot(const MachineInstr *MI,
                                        int &FrameIndex) const;
   virtual unsigned isStoreToStackSlot(const MachineInstr *MI,
diff --git a/lib/Target/Alpha/AlphaInstrInfo.cpp b/lib/Target/Alpha/AlphaInstrInfo.cpp
index ad625a26941..5a2f5610fdb 100644
--- a/lib/Target/Alpha/AlphaInstrInfo.cpp
+++ b/lib/Target/Alpha/AlphaInstrInfo.cpp
@@ -27,32 +27,6 @@ AlphaInstrInfo::AlphaInstrInfo()
     RI(*this) { }
 
 
-bool AlphaInstrInfo::isMoveInstr(const MachineInstr& MI,
-                                 unsigned& sourceReg, unsigned& destReg,
-                                 unsigned& SrcSR, unsigned& DstSR) const {
-  unsigned oc = MI.getOpcode();
-  if (oc == Alpha::BISr   || 
-      oc == Alpha::CPYSS  || 
-      oc == Alpha::CPYST  ||
-      oc == Alpha::CPYSSt || 
-      oc == Alpha::CPYSTs) {
-    // or r1, r2, r2 
-    // cpys(s|t) r1 r2 r2
-    assert(MI.getNumOperands() >= 3 &&
-           MI.getOperand(0).isReg() &&
-           MI.getOperand(1).isReg() &&
-           MI.getOperand(2).isReg() &&
-           "invalid Alpha BIS instruction!");
-    if (MI.getOperand(1).getReg() == MI.getOperand(2).getReg()) {
-      sourceReg = MI.getOperand(1).getReg();
-      destReg = MI.getOperand(0).getReg();
-      SrcSR = DstSR = 0;
-      return true;
-    }
-  }
-  return false;
-}
-
 unsigned 
 AlphaInstrInfo::isLoadFromStackSlot(const MachineInstr *MI,
                                     int &FrameIndex) const {
diff --git a/lib/Target/Alpha/AlphaInstrInfo.h b/lib/Target/Alpha/AlphaInstrInfo.h
index e20e8323b64..ee6077a4a01 100644
--- a/lib/Target/Alpha/AlphaInstrInfo.h
+++ b/lib/Target/Alpha/AlphaInstrInfo.h
@@ -30,12 +30,6 @@ public:
   ///
   virtual const AlphaRegisterInfo &getRegisterInfo() const { return RI; }
 
-  /// Return true if the instruction is a register to register move and return
-  /// the source and dest operands and their sub-register indices by reference.
-  virtual bool isMoveInstr(const MachineInstr &MI,
-                           unsigned &SrcReg, unsigned &DstReg,
-                           unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
-  
   virtual unsigned isLoadFromStackSlot(const MachineInstr *MI,
                                        int &FrameIndex) const;
   virtual unsigned isStoreToStackSlot(const MachineInstr *MI,
diff --git a/lib/Target/Blackfin/BlackfinInstrInfo.cpp b/lib/Target/Blackfin/BlackfinInstrInfo.cpp
index a74d42d5954..e50d57a31b6 100644
--- a/lib/Target/Blackfin/BlackfinInstrInfo.cpp
+++ b/lib/Target/Blackfin/BlackfinInstrInfo.cpp
@@ -28,34 +28,6 @@ BlackfinInstrInfo::BlackfinInstrInfo(BlackfinSubtarget &ST)
     RI(ST, *this),
     Subtarget(ST) {}
 
-/// Return true if the instruction is a register to register move and
-/// leave the source and dest operands in the passed parameters.
-bool BlackfinInstrInfo::isMoveInstr(const MachineInstr &MI,
-                                    unsigned &SrcReg,
-                                    unsigned &DstReg,
-                                    unsigned &SrcSR,
-                                    unsigned &DstSR) const {
-  SrcSR = DstSR = 0; // No sub-registers.
-  switch (MI.getOpcode()) {
-  case BF::MOVE:
-  case BF::MOVE_ncccc:
-  case BF::MOVE_ccncc:
-  case BF::MOVECC_zext:
-  case BF::MOVECC_nz:
-    DstReg = MI.getOperand(0).getReg();
-    SrcReg = MI.getOperand(1).getReg();
-    return true;
-  case BF::SLL16i:
-    if (MI.getOperand(2).getImm()!=0)
-      return false;
-    DstReg = MI.getOperand(0).getReg();
-    SrcReg = MI.getOperand(1).getReg();
-    return true;
-  default:
-    return false;
-  }
-}
-
 /// isLoadFromStackSlot - If the specified machine instruction is a direct
 /// load from a stack slot, return the virtual or physical register number of
 /// the destination along with the FrameIndex of the loaded stack slot.  If
diff --git a/lib/Target/Blackfin/BlackfinInstrInfo.h b/lib/Target/Blackfin/BlackfinInstrInfo.h
index 6c359170726..fdc1029da58 100644
--- a/lib/Target/Blackfin/BlackfinInstrInfo.h
+++ b/lib/Target/Blackfin/BlackfinInstrInfo.h
@@ -30,10 +30,6 @@ namespace llvm {
     /// always be able to get register info as well (through this method).
     virtual const BlackfinRegisterInfo &getRegisterInfo() const { return RI; }
 
-    virtual bool isMoveInstr(const MachineInstr &MI,
-                             unsigned &SrcReg, unsigned &DstReg,
-                             unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
-
     virtual unsigned isLoadFromStackSlot(const MachineInstr *MI,
                                          int &FrameIndex) const;
 
diff --git a/lib/Target/CellSPU/SPUInstrInfo.cpp b/lib/Target/CellSPU/SPUInstrInfo.cpp
index 69aa0887bd7..26d6b4f25ef 100644
--- a/lib/Target/CellSPU/SPUInstrInfo.cpp
+++ b/lib/Target/CellSPU/SPUInstrInfo.cpp
@@ -54,148 +54,6 @@ SPUInstrInfo::SPUInstrInfo(SPUTargetMachine &tm)
     RI(*TM.getSubtargetImpl(), *this)
 { /* NOP */ }
 
-bool
-SPUInstrInfo::isMoveInstr(const MachineInstr& MI,
-                          unsigned& sourceReg,
-                          unsigned& destReg,
-                          unsigned& SrcSR, unsigned& DstSR) const {
-  SrcSR = DstSR = 0;  // No sub-registers.
-
-  switch (MI.getOpcode()) {
-  default:
-    break;
-  case SPU::ORIv4i32:
-  case SPU::ORIr32:
-  case SPU::ORHIv8i16:
-  case SPU::ORHIr16:
-  case SPU::ORHIi8i16:
-  case SPU::ORBIv16i8:
-  case SPU::ORBIr8:
-  case SPU::ORIi16i32:
-  case SPU::ORIi8i32:
-  case SPU::AHIvec:
-  case SPU::AHIr16:
-  case SPU::AIv4i32:
-    assert(MI.getNumOperands() == 3 &&
-           MI.getOperand(0).isReg() &&
-           MI.getOperand(1).isReg() &&
-           MI.getOperand(2).isImm() &&
-           "invalid SPU ORI/ORHI/ORBI/AHI/AI/SFI/SFHI instruction!");
-    if (MI.getOperand(2).getImm() == 0) {
-      sourceReg = MI.getOperand(1).getReg();
-      destReg = MI.getOperand(0).getReg();
-      return true;
-    }
-    break;
-  case SPU::AIr32:
-    assert(MI.getNumOperands() == 3 &&
-           "wrong number of operands to AIr32");
-    if (MI.getOperand(0).isReg() &&
-        MI.getOperand(1).isReg() &&
-        (MI.getOperand(2).isImm() &&
-         MI.getOperand(2).getImm() == 0)) {
-      sourceReg = MI.getOperand(1).getReg();
-      destReg = MI.getOperand(0).getReg();
-      return true;
-    }
-    break;
-  case SPU::LRr8:
-  case SPU::LRr16:
-  case SPU::LRr32:
-  case SPU::LRf32:
-  case SPU::LRr64:
-  case SPU::LRf64:
-  case SPU::LRr128:
-  case SPU::LRv16i8:
-  case SPU::LRv8i16:
-  case SPU::LRv4i32:
-  case SPU::LRv4f32:
-  case SPU::LRv2i64:
-  case SPU::LRv2f64:
-  case SPU::ORv16i8_i8:
-  case SPU::ORv8i16_i16:
-  case SPU::ORv4i32_i32:
-  case SPU::ORv2i64_i64:
-  case SPU::ORv4f32_f32:
-  case SPU::ORv2f64_f64:
-  case SPU::ORi8_v16i8:
-  case SPU::ORi16_v8i16:
-  case SPU::ORi32_v4i32:
-  case SPU::ORi64_v2i64:
-  case SPU::ORf32_v4f32:
-  case SPU::ORf64_v2f64:
-/*
-  case SPU::ORi128_r64:
-  case SPU::ORi128_f64:
-  case SPU::ORi128_r32:
-  case SPU::ORi128_f32:
-  case SPU::ORi128_r16:
-  case SPU::ORi128_r8:
-*/
-  case SPU::ORi128_vec:
-/*
-  case SPU::ORr64_i128:
-  case SPU::ORf64_i128:
-  case SPU::ORr32_i128:
-  case SPU::ORf32_i128:
-  case SPU::ORr16_i128:
-  case SPU::ORr8_i128:
-*/
-  case SPU::ORvec_i128:
-/*
-  case SPU::ORr16_r32:
-  case SPU::ORr8_r32:
-  case SPU::ORf32_r32:
-  case SPU::ORr32_f32:
-  case SPU::ORr32_r16:
-  case SPU::ORr32_r8:
-  case SPU::ORr16_r64:
-  case SPU::ORr8_r64:
-  case SPU::ORr64_r16:
-  case SPU::ORr64_r8:
-*/
-  case SPU::ORr64_r32:
-  case SPU::ORr32_r64:
-  case SPU::ORf32_r32:
-  case SPU::ORr32_f32:
-  case SPU::ORf64_r64:
-  case SPU::ORr64_f64: {
-    assert(MI.getNumOperands() == 2 &&
-           MI.getOperand(0).isReg() &&
-           MI.getOperand(1).isReg() &&
-           "invalid SPU OR<type>_<vec> or LR instruction!");
-      sourceReg = MI.getOperand(1).getReg();
-      destReg = MI.getOperand(0).getReg();
-      return true;
-    break;
-  }
-  case SPU::ORv16i8:
-  case SPU::ORv8i16:
-  case SPU::ORv4i32:
-  case SPU::ORv2i64:
-  case SPU::ORr8:
-  case SPU::ORr16:
-  case SPU::ORr32:
-  case SPU::ORr64:
-  case SPU::ORr128:
-  case SPU::ORf32:
-  case SPU::ORf64:
-    assert(MI.getNumOperands() == 3 &&
-           MI.getOperand(0).isReg() &&
-           MI.getOperand(1).isReg() &&
-           MI.getOperand(2).isReg() &&
-           "invalid SPU OR(vec|r32|r64|gprc) instruction!");
-    if (MI.getOperand(1).getReg() == MI.getOperand(2).getReg()) {
-      sourceReg = MI.getOperand(1).getReg();
-      destReg = MI.getOperand(0).getReg();
-      return true;
-    }
-    break;
-  }
-
-  return false;
-}
-
 unsigned
 SPUInstrInfo::isLoadFromStackSlot(const MachineInstr *MI,
                                   int &FrameIndex) const {
diff --git a/lib/Target/CellSPU/SPUInstrInfo.h b/lib/Target/CellSPU/SPUInstrInfo.h
index fbb17331814..191e55d0ca6 100644
--- a/lib/Target/CellSPU/SPUInstrInfo.h
+++ b/lib/Target/CellSPU/SPUInstrInfo.h
@@ -32,12 +32,6 @@ namespace llvm {
     ///
     virtual const SPURegisterInfo &getRegisterInfo() const { return RI; }
 
-    /// Return true if the instruction is a register to register move and return
-    /// the source and dest operands and their sub-register indices by reference.
-    virtual bool isMoveInstr(const MachineInstr &MI,
-                             unsigned &SrcReg, unsigned &DstReg,
-                             unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
-
     unsigned isLoadFromStackSlot(const MachineInstr *MI,
                                  int &FrameIndex) const;
     unsigned isStoreToStackSlot(const MachineInstr *MI,
diff --git a/lib/Target/MBlaze/MBlazeInstrInfo.cpp b/lib/Target/MBlaze/MBlazeInstrInfo.cpp
index 6ff5825a26b..b590c090e09 100644
--- a/lib/Target/MBlaze/MBlazeInstrInfo.cpp
+++ b/lib/Target/MBlaze/MBlazeInstrInfo.cpp
@@ -30,41 +30,6 @@ static bool isZeroImm(const MachineOperand &op) {
   return op.isImm() && op.getImm() == 0;
 }
 
-/// Return true if the instruction is a register to register move and
-/// leave the source and dest operands in the passed parameters.
-bool MBlazeInstrInfo::
-isMoveInstr(const MachineInstr &MI, unsigned &SrcReg, unsigned &DstReg,
-            unsigned &SrcSubIdx, unsigned &DstSubIdx) const {
-  SrcSubIdx = DstSubIdx = 0; // No sub-registers.
-
-  // add $dst, $src, $zero || addu $dst, $zero, $src
-  // or  $dst, $src, $zero || or   $dst, $zero, $src
-  if ((MI.getOpcode() == MBlaze::ADD) || (MI.getOpcode() == MBlaze::OR)) {
-    if (MI.getOperand(1).isReg() && MI.getOperand(1).getReg() == MBlaze::R0) {
-      DstReg = MI.getOperand(0).getReg();
-      SrcReg = MI.getOperand(2).getReg();
-      return true;
-    } else if (MI.getOperand(2).isReg() && 
-               MI.getOperand(2).getReg() == MBlaze::R0) {
-      DstReg = MI.getOperand(0).getReg();
-      SrcReg = MI.getOperand(1).getReg();
-      return true;
-    }
-  }
-
-  // addi $dst, $src, 0
-  // ori  $dst, $src, 0
-  if ((MI.getOpcode() == MBlaze::ADDI) || (MI.getOpcode() == MBlaze::ORI)) {
-    if ((MI.getOperand(1).isReg()) && (isZeroImm(MI.getOperand(2)))) {
-      DstReg = MI.getOperand(0).getReg();
-      SrcReg = MI.getOperand(1).getReg();
-      return true;
-    }
-  }
-
-  return false;
-}
-
 /// isLoadFromStackSlot - If the specified machine instruction is a direct
 /// load from a stack slot, return the virtual or physical register number of
 /// the destination along with the FrameIndex of the loaded stack slot.  If
diff --git a/lib/Target/MBlaze/MBlazeInstrInfo.h b/lib/Target/MBlaze/MBlazeInstrInfo.h
index f0743705f01..b3dba0ec768 100644
--- a/lib/Target/MBlaze/MBlazeInstrInfo.h
+++ b/lib/Target/MBlaze/MBlazeInstrInfo.h
@@ -173,12 +173,6 @@ public:
   ///
   virtual const MBlazeRegisterInfo &getRegisterInfo() const { return RI; }
 
-  /// Return true if the instruction is a register to register move and return
-  /// the source and dest operands and their sub-register indices by reference.
-  virtual bool isMoveInstr(const MachineInstr &MI,
-                           unsigned &SrcReg, unsigned &DstReg,
-                           unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
-
   /// isLoadFromStackSlot - If the specified machine instruction is a direct
   /// load from a stack slot, return the virtual or physical register number of
   /// the destination along with the FrameIndex of the loaded stack slot.  If
diff --git a/lib/Target/MSP430/MSP430InstrInfo.cpp b/lib/Target/MSP430/MSP430InstrInfo.cpp
index fececb0c112..bfab844f5b1 100644
--- a/lib/Target/MSP430/MSP430InstrInfo.cpp
+++ b/lib/Target/MSP430/MSP430InstrInfo.cpp
@@ -99,27 +99,6 @@ void MSP430InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
     .addReg(SrcReg, getKillRegState(KillSrc));
 }
 
-bool
-MSP430InstrInfo::isMoveInstr(const MachineInstr& MI,
-                             unsigned &SrcReg, unsigned &DstReg,
-                             unsigned &SrcSubIdx, unsigned &DstSubIdx) const {
-  SrcSubIdx = DstSubIdx = 0; // No sub-registers yet.
-
-  switch (MI.getOpcode()) {
-  default:
-    return false;
-  case MSP430::MOV8rr:
-  case MSP430::MOV16rr:
-   assert(MI.getNumOperands() >= 2 &&
-           MI.getOperand(0).isReg() &&
-           MI.getOperand(1).isReg() &&
-           "invalid register-register move instruction");
-    SrcReg = MI.getOperand(1).getReg();
-    DstReg = MI.getOperand(0).getReg();
-    return true;
-  }
-}
-
 bool
 MSP430InstrInfo::spillCalleeSavedRegisters(MachineBasicBlock &MBB,
                                            MachineBasicBlock::iterator MI,
diff --git a/lib/Target/MSP430/MSP430InstrInfo.h b/lib/Target/MSP430/MSP430InstrInfo.h
index ebbda1aeef5..49ccc032bf2 100644
--- a/lib/Target/MSP430/MSP430InstrInfo.h
+++ b/lib/Target/MSP430/MSP430InstrInfo.h
@@ -54,10 +54,6 @@ public:
                    unsigned DestReg, unsigned SrcReg,
                    bool KillSrc) const;
 
-  bool isMoveInstr(const MachineInstr& MI,
-                   unsigned &SrcReg, unsigned &DstReg,
-                   unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
-
   virtual void storeRegToStackSlot(MachineBasicBlock &MBB,
                                    MachineBasicBlock::iterator MI,
                                    unsigned SrcReg, bool isKill,
diff --git a/lib/Target/Mips/MipsInstrInfo.cpp b/lib/Target/Mips/MipsInstrInfo.cpp
index 6c09a3e1078..aaf307b1ce3 100644
--- a/lib/Target/Mips/MipsInstrInfo.cpp
+++ b/lib/Target/Mips/MipsInstrInfo.cpp
@@ -30,53 +30,6 @@ static bool isZeroImm(const MachineOperand &op) {
   return op.isImm() && op.getImm() == 0;
 }
 
-/// Return true if the instruction is a register to register move and
-/// leave the source and dest operands in the passed parameters.
-bool MipsInstrInfo::
-isMoveInstr(const MachineInstr &MI, unsigned &SrcReg, unsigned &DstReg,
-            unsigned &SrcSubIdx, unsigned &DstSubIdx) const 
-{
-  SrcSubIdx = DstSubIdx = 0; // No sub-registers.
-
-  // addu $dst, $src, $zero || addu $dst, $zero, $src
-  // or   $dst, $src, $zero || or   $dst, $zero, $src
-  if ((MI.getOpcode() == Mips::ADDu) || (MI.getOpcode() == Mips::OR)) {
-    if (MI.getOperand(1).getReg() == Mips::ZERO) {
-      DstReg = MI.getOperand(0).getReg();
-      SrcReg = MI.getOperand(2).getReg();
-      return true;
-    } else if (MI.getOperand(2).getReg() == Mips::ZERO) {
-      DstReg = MI.getOperand(0).getReg();
-      SrcReg = MI.getOperand(1).getReg();
-      return true;
-    }
-  }
-
-  // mov $fpDst, $fpSrc
-  // mfc $gpDst, $fpSrc
-  // mtc $fpDst, $gpSrc
-  if (MI.getOpcode() == Mips::FMOV_S32 || 
-      MI.getOpcode() == Mips::FMOV_D32 || 
-      MI.getOpcode() == Mips::MFC1 || 
-      MI.getOpcode() == Mips::MTC1 ||
-      MI.getOpcode() == Mips::MOVCCRToCCR) {
-    DstReg = MI.getOperand(0).getReg();
-    SrcReg = MI.getOperand(1).getReg();
-    return true;
-  }
-
-  // addiu $dst, $src, 0
-  if (MI.getOpcode() == Mips::ADDiu) {
-    if ((MI.getOperand(1).isReg()) && (isZeroImm(MI.getOperand(2)))) {
-      DstReg = MI.getOperand(0).getReg();
-      SrcReg = MI.getOperand(1).getReg();
-      return true;
-    }
-  }
-
-  return false;
-}
-
 /// isLoadFromStackSlot - If the specified machine instruction is a direct
 /// load from a stack slot, return the virtual or physical register number of
 /// the destination along with the FrameIndex of the loaded stack slot.  If
diff --git a/lib/Target/Mips/MipsInstrInfo.h b/lib/Target/Mips/MipsInstrInfo.h
index d6f87f9b0ce..52a3d39840b 100644
--- a/lib/Target/Mips/MipsInstrInfo.h
+++ b/lib/Target/Mips/MipsInstrInfo.h
@@ -174,12 +174,6 @@ public:
   ///
   virtual const MipsRegisterInfo &getRegisterInfo() const { return RI; }
 
-  /// Return true if the instruction is a register to register move and return
-  /// the source and dest operands and their sub-register indices by reference.
-  virtual bool isMoveInstr(const MachineInstr &MI,
-                           unsigned &SrcReg, unsigned &DstReg,
-                           unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
-  
   /// isLoadFromStackSlot - If the specified machine instruction is a direct
   /// load from a stack slot, return the virtual or physical register number of
   /// the destination along with the FrameIndex of the loaded stack slot.  If
diff --git a/lib/Target/PIC16/PIC16InstrInfo.cpp b/lib/Target/PIC16/PIC16InstrInfo.cpp
index e784f746f7f..81257f3c410 100644
--- a/lib/Target/PIC16/PIC16InstrInfo.cpp
+++ b/lib/Target/PIC16/PIC16InstrInfo.cpp
@@ -167,21 +167,6 @@ void PIC16InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
     .addReg(SrcReg, getKillRegState(KillSrc));
 }
 
-bool PIC16InstrInfo::isMoveInstr(const MachineInstr &MI,
-                                 unsigned &SrcReg, unsigned &DestReg,
-                                 unsigned &SrcSubIdx, unsigned &DstSubIdx) const {
-  SrcSubIdx = DstSubIdx = 0; // No sub-registers.
-
-  if (MI.getOpcode() == PIC16::copy_fsr
-      || MI.getOpcode() == PIC16::copy_w) {
-    DestReg = MI.getOperand(0).getReg();
-    SrcReg = MI.getOperand(1).getReg();
-    return true;
-  }
-
-  return false;
-}
-
 /// InsertBranch - Insert a branch into the end of the specified
 /// MachineBasicBlock.  This operands to this method are the same as those
 /// returned by AnalyzeBranch.  This is invoked in cases where AnalyzeBranch
diff --git a/lib/Target/PIC16/PIC16InstrInfo.h b/lib/Target/PIC16/PIC16InstrInfo.h
index a3a77f11ba1..661b335d3b6 100644
--- a/lib/Target/PIC16/PIC16InstrInfo.h
+++ b/lib/Target/PIC16/PIC16InstrInfo.h
@@ -61,10 +61,6 @@ public:
                            MachineBasicBlock::iterator I, DebugLoc DL,
                            unsigned DestReg, unsigned SrcReg,
                            bool KillSrc) const;
-  virtual bool isMoveInstr(const MachineInstr &MI,
-                           unsigned &SrcReg, unsigned &DstReg,
-                           unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
-
   virtual 
   unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
                         MachineBasicBlock *FBB,
diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp
index 90e34727957..c17108fa923 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -39,67 +39,6 @@ PPCInstrInfo::PPCInstrInfo(PPCTargetMachine &tm)
   : TargetInstrInfoImpl(PPCInsts, array_lengthof(PPCInsts)), TM(tm),
     RI(*TM.getSubtargetImpl(), *this) {}
 
-bool PPCInstrInfo::isMoveInstr(const MachineInstr& MI,
-                               unsigned& sourceReg,
-                               unsigned& destReg,
-                               unsigned& sourceSubIdx,
-                               unsigned& destSubIdx) const {
-  sourceSubIdx = destSubIdx = 0; // No sub-registers.
-
-  unsigned oc = MI.getOpcode();
-  if (oc == PPC::OR || oc == PPC::OR8 || oc == PPC::VOR ||
-      oc == PPC::OR4To8 || oc == PPC::OR8To4) {                // or r1, r2, r2
-    assert(MI.getNumOperands() >= 3 &&
-           MI.getOperand(0).isReg() &&
-           MI.getOperand(1).isReg() &&
-           MI.getOperand(2).isReg() &&
-           "invalid PPC OR instruction!");
-    if (MI.getOperand(1).getReg() == MI.getOperand(2).getReg()) {
-      sourceReg = MI.getOperand(1).getReg();
-      destReg = MI.getOperand(0).getReg();
-      return true;
-    }
-  } else if (oc == PPC::ADDI) {             // addi r1, r2, 0
-    assert(MI.getNumOperands() >= 3 &&
-           MI.getOperand(0).isReg() &&
-           MI.getOperand(2).isImm() &&
-           "invalid PPC ADDI instruction!");
-    if (MI.getOperand(1).isReg() && MI.getOperand(2).getImm() == 0) {
-      sourceReg = MI.getOperand(1).getReg();
-      destReg = MI.getOperand(0).getReg();
-      return true;
-    }
-  } else if (oc == PPC::ORI) {             // ori r1, r2, 0
-    assert(MI.getNumOperands() >= 3 &&
-           MI.getOperand(0).isReg() &&
-           MI.getOperand(1).isReg() &&
-           MI.getOperand(2).isImm() &&
-           "invalid PPC ORI instruction!");
-    if (MI.getOperand(2).getImm() == 0) {
-      sourceReg = MI.getOperand(1).getReg();
-      destReg = MI.getOperand(0).getReg();
-      return true;
-    }
-  } else if (oc == PPC::FMR) { // fmr r1, r2
-    assert(MI.getNumOperands() >= 2 &&
-           MI.getOperand(0).isReg() &&
-           MI.getOperand(1).isReg() &&
-           "invalid PPC FMR instruction");
-    sourceReg = MI.getOperand(1).getReg();
-    destReg = MI.getOperand(0).getReg();
-    return true;
-  } else if (oc == PPC::MCRF) {             // mcrf cr1, cr2
-    assert(MI.getNumOperands() >= 2 &&
-           MI.getOperand(0).isReg() &&
-           MI.getOperand(1).isReg() &&
-           "invalid PPC MCRF instruction");
-    sourceReg = MI.getOperand(1).getReg();
-    destReg = MI.getOperand(0).getReg();
-    return true;
-  }
-  return false;
-}
-
 unsigned PPCInstrInfo::isLoadFromStackSlot(const MachineInstr *MI, 
                                            int &FrameIndex) const {
   switch (MI->getOpcode()) {
diff --git a/lib/Target/PowerPC/PPCInstrInfo.h b/lib/Target/PowerPC/PPCInstrInfo.h
index eadb21e2170..fc7b7b3cb89 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.h
+++ b/lib/Target/PowerPC/PPCInstrInfo.h
@@ -82,12 +82,6 @@ public:
   ///
   virtual const PPCRegisterInfo &getRegisterInfo() const { return RI; }
 
-  /// Return true if the instruction is a register to register move and return
-  /// the source and dest operands and their sub-register indices by reference.
-  virtual bool isMoveInstr(const MachineInstr &MI,
-                           unsigned &SrcReg, unsigned &DstReg,
-                           unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
-
   unsigned isLoadFromStackSlot(const MachineInstr *MI,
                                int &FrameIndex) const;
   unsigned isStoreToStackSlot(const MachineInstr *MI,
diff --git a/lib/Target/Sparc/SparcInstrInfo.cpp b/lib/Target/Sparc/SparcInstrInfo.cpp
index 3a4c80ad076..7ede8e7ebbe 100644
--- a/lib/Target/Sparc/SparcInstrInfo.cpp
+++ b/lib/Target/Sparc/SparcInstrInfo.cpp
@@ -28,46 +28,6 @@ SparcInstrInfo::SparcInstrInfo(SparcSubtarget &ST)
     RI(ST, *this), Subtarget(ST) {
 }
 
-static bool isZeroImm(const MachineOperand &op) {
-  return op.isImm() && op.getImm() == 0;
-}
-
-/// Return true if the instruction is a register to register move and
-/// leave the source and dest operands in the passed parameters.
-///
-bool SparcInstrInfo::isMoveInstr(const MachineInstr &MI,
-                                 unsigned &SrcReg, unsigned &DstReg,
-                                 unsigned &SrcSR, unsigned &DstSR) const {
-  SrcSR = DstSR = 0; // No sub-registers.
-
-  // We look for 3 kinds of patterns here:
-  // or with G0 or 0
-  // add with G0 or 0
-  // fmovs or FpMOVD (pseudo double move).
-  if (MI.getOpcode() == SP::ORrr || MI.getOpcode() == SP::ADDrr) {
-    if (MI.getOperand(1).getReg() == SP::G0) {
-      DstReg = MI.getOperand(0).getReg();
-      SrcReg = MI.getOperand(2).getReg();
-      return true;
-    } else if (MI.getOperand(2).getReg() == SP::G0) {
-      DstReg = MI.getOperand(0).getReg();
-      SrcReg = MI.getOperand(1).getReg();
-      return true;
-    }
-  } else if ((MI.getOpcode() == SP::ORri || MI.getOpcode() == SP::ADDri) &&
-             isZeroImm(MI.getOperand(2)) && MI.getOperand(1).isReg()) {
-    DstReg = MI.getOperand(0).getReg();
-    SrcReg = MI.getOperand(1).getReg();
-    return true;
-  } else if (MI.getOpcode() == SP::FMOVS || MI.getOpcode() == SP::FpMOVD ||
-             MI.getOpcode() == SP::FMOVD) {
-    SrcReg = MI.getOperand(1).getReg();
-    DstReg = MI.getOperand(0).getReg();
-    return true;
-  }
-  return false;
-}
-
 /// isLoadFromStackSlot - If the specified machine instruction is a direct
 /// load from a stack slot, return the virtual or physical register number of
 /// the destination along with the FrameIndex of the loaded stack slot.  If
diff --git a/lib/Target/Sparc/SparcInstrInfo.h b/lib/Target/Sparc/SparcInstrInfo.h
index 133471857ba..c00bd219876 100644
--- a/lib/Target/Sparc/SparcInstrInfo.h
+++ b/lib/Target/Sparc/SparcInstrInfo.h
@@ -43,12 +43,6 @@ public:
   ///
   virtual const SparcRegisterInfo &getRegisterInfo() const { return RI; }
 
-  /// Return true if the instruction is a register to register move and return
-  /// the source and dest operands and their sub-register indices by reference.
-  virtual bool isMoveInstr(const MachineInstr &MI,
-                           unsigned &SrcReg, unsigned &DstReg,
-                           unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
-  
   /// isLoadFromStackSlot - If the specified machine instruction is a direct
   /// load from a stack slot, return the virtual or physical register number of
   /// the destination along with the FrameIndex of the loaded stack slot.  If
diff --git a/lib/Target/SystemZ/SystemZInstrInfo.cpp b/lib/Target/SystemZ/SystemZInstrInfo.cpp
index c03864fe41e..367bed3a853 100644
--- a/lib/Target/SystemZ/SystemZInstrInfo.cpp
+++ b/lib/Target/SystemZ/SystemZInstrInfo.cpp
@@ -141,31 +141,6 @@ void SystemZInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
     .addReg(SrcReg, getKillRegState(KillSrc));
 }
 
-bool
-SystemZInstrInfo::isMoveInstr(const MachineInstr& MI,
-                              unsigned &SrcReg, unsigned &DstReg,
-                              unsigned &SrcSubIdx, unsigned &DstSubIdx) const {
-  switch (MI.getOpcode()) {
-  default:
-    return false;
-  case SystemZ::MOV32rr:
-  case SystemZ::MOV64rr:
-  case SystemZ::MOV64rrP:
-  case SystemZ::MOV128rr:
-  case SystemZ::FMOV32rr:
-  case SystemZ::FMOV64rr:
-    assert(MI.getNumOperands() >= 2 &&
-           MI.getOperand(0).isReg() &&
-           MI.getOperand(1).isReg() &&
-           "invalid register-register move instruction");
-    SrcReg = MI.getOperand(1).getReg();
-    DstReg = MI.getOperand(0).getReg();
-    SrcSubIdx = MI.getOperand(1).getSubReg();
-    DstSubIdx = MI.getOperand(0).getSubReg();
-    return true;
-  }
-}
-
 unsigned SystemZInstrInfo::isLoadFromStackSlot(const MachineInstr *MI,
                                                int &FrameIndex) const {
   switch (MI->getOpcode()) {
diff --git a/lib/Target/SystemZ/SystemZInstrInfo.h b/lib/Target/SystemZ/SystemZInstrInfo.h
index 0559619248a..c248f2489c4 100644
--- a/lib/Target/SystemZ/SystemZInstrInfo.h
+++ b/lib/Target/SystemZ/SystemZInstrInfo.h
@@ -65,9 +65,6 @@ public:
                            unsigned DestReg, unsigned SrcReg,
                            bool KillSrc) const;
 
-  bool isMoveInstr(const MachineInstr& MI,
-                   unsigned &SrcReg, unsigned &DstReg,
-                   unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
   unsigned isLoadFromStackSlot(const MachineInstr *MI, int &FrameIndex) const;
   unsigned isStoreToStackSlot(const MachineInstr *MI, int &FrameIndex) const;
 
diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp
index 33d2d9ea082..c34e73d33a5 100644
--- a/lib/Target/X86/X86InstrInfo.cpp
+++ b/lib/Target/X86/X86InstrInfo.cpp
@@ -667,46 +667,6 @@ X86InstrInfo::X86InstrInfo(X86TargetMachine &tm)
   assert(AmbEntries.empty() && "Duplicated entries in unfolding maps?");
 }
 
-bool X86InstrInfo::isMoveInstr(const MachineInstr& MI,
-                               unsigned &SrcReg, unsigned &DstReg,
-                               unsigned &SrcSubIdx, unsigned &DstSubIdx) const {
-  switch (MI.getOpcode()) {
-  default:
-    return false;
-  case X86::MOV8rr:
-  case X86::MOV8rr_NOREX:
-  case X86::MOV16rr:
-  case X86::MOV32rr: 
-  case X86::MOV64rr:
-  case X86::MOV32rr_TC: 
-  case X86::MOV64rr_TC:
-
-  // FP Stack register class copies
-  case X86::MOV_Fp3232: case X86::MOV_Fp6464: case X86::MOV_Fp8080:
-  case X86::MOV_Fp3264: case X86::MOV_Fp3280:
-  case X86::MOV_Fp6432: case X86::MOV_Fp8032:
-
-  // Note that MOVSSrr and MOVSDrr are not considered copies. FR32 and FR64
-  // copies are done with FsMOVAPSrr and FsMOVAPDrr.
-
-  case X86::FsMOVAPSrr:
-  case X86::FsMOVAPDrr:
-  case X86::MOVAPSrr:
-  case X86::MOVAPDrr:
-  case X86::MOVDQArr:
-  case X86::MMX_MOVQ64rr:
-    assert(MI.getNumOperands() >= 2 &&
-           MI.getOperand(0).isReg() &&
-           MI.getOperand(1).isReg() &&
-           "invalid register-register move instruction");
-    SrcReg = MI.getOperand(1).getReg();
-    DstReg = MI.getOperand(0).getReg();
-    SrcSubIdx = MI.getOperand(1).getSubReg();
-    DstSubIdx = MI.getOperand(0).getSubReg();
-    return true;
-  }
-}
-
 bool
 X86InstrInfo::isCoalescableExtInstr(const MachineInstr &MI,
                                     unsigned &SrcReg, unsigned &DstReg,
diff --git a/lib/Target/X86/X86InstrInfo.h b/lib/Target/X86/X86InstrInfo.h
index ad0217adb47..5161c6d4318 100644
--- a/lib/Target/X86/X86InstrInfo.h
+++ b/lib/Target/X86/X86InstrInfo.h
@@ -610,12 +610,6 @@ public:
   ///
   virtual const X86RegisterInfo &getRegisterInfo() const { return RI; }
 
-  /// Return true if the instruction is a register to register move and return
-  /// the source and dest operands and their sub-register indices by reference.
-  virtual bool isMoveInstr(const MachineInstr &MI,
-                           unsigned &SrcReg, unsigned &DstReg,
-                           unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
-
   /// isCoalescableExtInstr - Return true if the instruction is a "coalescable"
   /// extension instruction. That is, it's like a copy where it's legal for the
   /// source to overlap the destination. e.g. X86::MOVSX64rr32. If this returns
diff --git a/lib/Target/XCore/XCoreInstrInfo.cpp b/lib/Target/XCore/XCoreInstrInfo.cpp
index 793651de08b..ad00046af17 100644
--- a/lib/Target/XCore/XCoreInstrInfo.cpp
+++ b/lib/Target/XCore/XCoreInstrInfo.cpp
@@ -46,33 +46,6 @@ static bool isZeroImm(const MachineOperand &op) {
   return op.isImm() && op.getImm() == 0;
 }
 
-/// Return true if the instruction is a register to register move and
-/// leave the source and dest operands in the passed parameters.
-///
-bool XCoreInstrInfo::isMoveInstr(const MachineInstr &MI,
-                                 unsigned &SrcReg, unsigned &DstReg,
-                                 unsigned &SrcSR, unsigned &DstSR) const {
-  SrcSR = DstSR = 0; // No sub-registers.
-
-  // We look for 4 kinds of patterns here:
-  // add dst, src, 0
-  // sub dst, src, 0
-  // or dst, src, src
-  // and dst, src, src
-  if ((MI.getOpcode() == XCore::ADD_2rus || MI.getOpcode() == XCore::SUB_2rus)
-      && isZeroImm(MI.getOperand(2))) {
-    DstReg = MI.getOperand(0).getReg();
-    SrcReg = MI.getOperand(1).getReg();
-    return true;
-  } else if ((MI.getOpcode() == XCore::OR_3r || MI.getOpcode() == XCore::AND_3r)
-      && MI.getOperand(1).getReg() == MI.getOperand(2).getReg()) {
-    DstReg = MI.getOperand(0).getReg();
-    SrcReg = MI.getOperand(1).getReg();
-    return true;
-  }
-  return false;
-}
-
 /// isLoadFromStackSlot - If the specified machine instruction is a direct
 /// load from a stack slot, return the virtual or physical register number of
 /// the destination along with the FrameIndex of the loaded stack slot.  If
diff --git a/lib/Target/XCore/XCoreInstrInfo.h b/lib/Target/XCore/XCoreInstrInfo.h
index e5b0171579f..d2b116eef0d 100644
--- a/lib/Target/XCore/XCoreInstrInfo.h
+++ b/lib/Target/XCore/XCoreInstrInfo.h
@@ -30,12 +30,6 @@ public:
   ///
   virtual const TargetRegisterInfo &getRegisterInfo() const { return RI; }
 
-  /// Return true if the instruction is a register to register move and return
-  /// the source and dest operands and their sub-register indices by reference.
-  virtual bool isMoveInstr(const MachineInstr &MI,
-                           unsigned &SrcReg, unsigned &DstReg,
-                           unsigned &SrcSubIdx, unsigned &DstSubIdx) const;
-  
   /// isLoadFromStackSlot - If the specified machine instruction is a direct
   /// load from a stack slot, return the virtual or physical register number of
   /// the destination along with the FrameIndex of the loaded stack slot.  If