- Added a few target hooks to generate load / store instructions from / to any

address (not just from / to frameindexes).
- Added target hooks to unfold load / store instructions / SDNodes into separate
load, data processing, store instructions / SDNodes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42621 91177308-0d34-0410-b5e6-96231b3b80d8

10 files changed, 460 insertions, 68 deletions

diff --git a/lib/Target/ARM/ARMRegisterInfo.cpp b/lib/Target/ARM/ARMRegisterInfo.cpp
index e6d99e5..02446e9 100644
--- a/lib/Target/ARM/ARMRegisterInfo.cpp
+++ b/lib/Target/ARM/ARMRegisterInfo.cpp
@@ -132,6 +132,30 @@ bool ARMRegisterInfo::restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
   return true;
 }
 
+static inline
+const MachineInstrBuilder &AddDefaultPred(const MachineInstrBuilder &MIB) {
+  return MIB.addImm((int64_t)ARMCC::AL).addReg(0);
+}
+
+static inline
+const MachineInstrBuilder &AddDefaultCC(const MachineInstrBuilder &MIB) {
+  return MIB.addReg(0);
+}
+
+static const MachineInstrBuilder &ARMInstrAddOperand(MachineInstrBuilder &MIB,
+                                                     MachineOperand &MO) {
+  if (MO.isRegister())
+    MIB = MIB.addReg(MO.getReg(), MO.isDef(), MO.isImplicit());
+  else if (MO.isImmediate())
+    MIB = MIB.addImm(MO.getImm());
+  else if (MO.isFrameIndex())
+    MIB = MIB.addFrameIndex(MO.getFrameIndex());
+  else
+    assert(0 && "Unknown operand for ARMInstrAddOperand!");
+
+  return MIB;
+}
+
 void ARMRegisterInfo::
 storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                     unsigned SrcReg, int FI,
@@ -143,17 +167,52 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
       BuildMI(MBB, I, TII.get(ARM::tSpill)).addReg(SrcReg, false, false, true)
         .addFrameIndex(FI).addImm(0);
     else
-      BuildMI(MBB, I, TII.get(ARM::STR)).addReg(SrcReg, false, false, true)
-        .addFrameIndex(FI).addReg(0).addImm(0).addImm((int64_t)ARMCC::AL)
-        .addReg(0);
+      AddDefaultPred(BuildMI(MBB, I, TII.get(ARM::STR))
+                     .addReg(SrcReg, false, false, true)
+                     .addFrameIndex(FI).addReg(0).addImm(0));
+  } else if (RC == ARM::DPRRegisterClass) {
+    AddDefaultPred(BuildMI(MBB, I, TII.get(ARM::FSTD))
+                   .addReg(SrcReg, false, false, true)
+                   .addFrameIndex(FI).addImm(0));
+  } else {
+    assert(RC == ARM::SPRRegisterClass && "Unknown regclass!");
+    AddDefaultPred(BuildMI(MBB, I, TII.get(ARM::FSTS))
+                   .addReg(SrcReg, false, false, true)
+                   .addFrameIndex(FI).addImm(0));
+  }
+}
+
+void ARMRegisterInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
+                                     SmallVector<MachineOperand,4> Addr,
+                                     const TargetRegisterClass *RC,
+                                  SmallVector<MachineInstr*, 4> &NewMIs) const {
+  unsigned Opc = 0;
+  if (RC == ARM::GPRRegisterClass) {
+    ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
+    if (AFI->isThumbFunction()) {
+      Opc = Addr[0].isFrameIndex() ? ARM::tSpill : ARM::tSTR;
+      MachineInstrBuilder MIB = 
+        BuildMI(TII.get(Opc)).addReg(SrcReg, false, false, true);
+      for (unsigned i = 0, e = Addr.size(); i != e; ++i)
+        MIB = ARMInstrAddOperand(MIB, Addr[i]);
+      NewMIs.push_back(MIB);
+      return;
+    }
+    Opc = ARM::STR;
   } else if (RC == ARM::DPRRegisterClass) {
-    BuildMI(MBB, I, TII.get(ARM::FSTD)).addReg(SrcReg, false, false, true)
-      .addFrameIndex(FI).addImm(0).addImm((int64_t)ARMCC::AL).addReg(0);
+    Opc = ARM::FSTD;
   } else {
     assert(RC == ARM::SPRRegisterClass && "Unknown regclass!");
-    BuildMI(MBB, I, TII.get(ARM::FSTS)).addReg(SrcReg, false, false, true)
-      .addFrameIndex(FI).addImm(0).addImm((int64_t)ARMCC::AL).addReg(0);
+    Opc = ARM::FSTS;
   }
+
+  MachineInstrBuilder MIB = 
+    BuildMI(TII.get(Opc)).addReg(SrcReg, false, false, true);
+  for (unsigned i = 0, e = Addr.size(); i != e; ++i)
+    MIB = ARMInstrAddOperand(MIB, Addr[i]);
+  AddDefaultPred(MIB);
+  NewMIs.push_back(MIB);
+  return;
 }
 
 void ARMRegisterInfo::
@@ -167,19 +226,49 @@ loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
       BuildMI(MBB, I, TII.get(ARM::tRestore), DestReg)
         .addFrameIndex(FI).addImm(0);
     else
-      BuildMI(MBB, I, TII.get(ARM::LDR), DestReg)
-        .addFrameIndex(FI).addReg(0).addImm(0).addImm((int64_t)ARMCC::AL)
-        .addReg(0);
+      AddDefaultPred(BuildMI(MBB, I, TII.get(ARM::LDR), DestReg)
+                     .addFrameIndex(FI).addReg(0).addImm(0));
   } else if (RC == ARM::DPRRegisterClass) {
-    BuildMI(MBB, I, TII.get(ARM::FLDD), DestReg)
-      .addFrameIndex(FI).addImm(0).addImm((int64_t)ARMCC::AL).addReg(0);
+    AddDefaultPred(BuildMI(MBB, I, TII.get(ARM::FLDD), DestReg)
+                   .addFrameIndex(FI).addImm(0));
   } else {
     assert(RC == ARM::SPRRegisterClass && "Unknown regclass!");
-    BuildMI(MBB, I, TII.get(ARM::FLDS), DestReg)
-      .addFrameIndex(FI).addImm(0).addImm((int64_t)ARMCC::AL).addReg(0);
+    AddDefaultPred(BuildMI(MBB, I, TII.get(ARM::FLDS), DestReg)
+                   .addFrameIndex(FI).addImm(0));
   }
 }
 
+void ARMRegisterInfo::loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
+                                      SmallVector<MachineOperand,4> Addr,
+                                      const TargetRegisterClass *RC,
+                                  SmallVector<MachineInstr*, 4> &NewMIs) const {
+  unsigned Opc = 0;
+  if (RC == ARM::GPRRegisterClass) {
+    ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
+    if (AFI->isThumbFunction()) {
+      Opc = Addr[0].isFrameIndex() ? ARM::tRestore : ARM::tLDR;
+      MachineInstrBuilder MIB = BuildMI(TII.get(Opc), DestReg);
+      for (unsigned i = 0, e = Addr.size(); i != e; ++i)
+        MIB = ARMInstrAddOperand(MIB, Addr[i]);
+      NewMIs.push_back(MIB);
+      return;
+    }
+    Opc = ARM::LDR;
+  } else if (RC == ARM::DPRRegisterClass) {
+    Opc = ARM::FLDD;
+  } else {
+    assert(RC == ARM::SPRRegisterClass && "Unknown regclass!");
+    Opc = ARM::FLDS;
+  }
+
+  MachineInstrBuilder MIB =  BuildMI(TII.get(Opc), DestReg);
+  for (unsigned i = 0, e = Addr.size(); i != e; ++i)
+    MIB = ARMInstrAddOperand(MIB, Addr[i]);
+  AddDefaultPred(MIB);
+  NewMIs.push_back(MIB);
+  return;
+}
+
 void ARMRegisterInfo::copyRegToReg(MachineBasicBlock &MBB,
                                    MachineBasicBlock::iterator I,
                                    unsigned DestReg, unsigned SrcReg,
@@ -196,14 +285,14 @@ void ARMRegisterInfo::copyRegToReg(MachineBasicBlock &MBB,
     if (AFI->isThumbFunction())
       BuildMI(MBB, I, TII.get(ARM::tMOVr), DestReg).addReg(SrcReg);
     else
-      BuildMI(MBB, I, TII.get(ARM::MOVr), DestReg).addReg(SrcReg)
-        .addImm((int64_t)ARMCC::AL).addReg(0).addReg(0);
+      AddDefaultCC(AddDefaultPred(BuildMI(MBB, I, TII.get(ARM::MOVr), DestReg)
+                                  .addReg(SrcReg)));
   } else if (DestRC == ARM::SPRRegisterClass)
-    BuildMI(MBB, I, TII.get(ARM::FCPYS), DestReg).addReg(SrcReg)
-      .addImm((int64_t)ARMCC::AL).addReg(0);
+    AddDefaultPred(BuildMI(MBB, I, TII.get(ARM::FCPYS), DestReg)
+                   .addReg(SrcReg));
   else if (DestRC == ARM::DPRRegisterClass)
-    BuildMI(MBB, I, TII.get(ARM::FCPYD), DestReg).addReg(SrcReg)
-      .addImm((int64_t)ARMCC::AL).addReg(0);
+    AddDefaultPred(BuildMI(MBB, I, TII.get(ARM::FCPYD), DestReg)
+                   .addReg(SrcReg));
   else
     abort();
 }
@@ -1390,7 +1479,7 @@ void ARMRegisterInfo::emitPrologue(MachineFunction &MF) const {
     MachineInstrBuilder MIB =
       BuildMI(MBB, MBBI, TII.get(isThumb ? ARM::tADDrSPi : ARM::ADDri),FramePtr)
       .addFrameIndex(FramePtrSpillFI).addImm(0);
-    if (!isThumb) MIB.addImm(ARMCC::AL).addReg(0).addReg(0);
+    if (!isThumb) AddDefaultCC(AddDefaultPred(MIB));
   }
 
   if (!isThumb) {
diff --git a/lib/Target/ARM/ARMRegisterInfo.h b/lib/Target/ARM/ARMRegisterInfo.h
index 7a2fd2c..cd32eb6 100644
--- a/lib/Target/ARM/ARMRegisterInfo.h
+++ b/lib/Target/ARM/ARMRegisterInfo.h
@@ -51,11 +51,21 @@ public:
                            unsigned SrcReg, int FrameIndex,
                            const TargetRegisterClass *RC) const;
 
+  void storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
+                      SmallVector<MachineOperand,4> Addr,
+                      const TargetRegisterClass *RC,
+                      SmallVector<MachineInstr*, 4> &NewMIs) const;
+
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MBBI,
                             unsigned DestReg, int FrameIndex,
                             const TargetRegisterClass *RC) const;
 
+  void loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
+                       SmallVector<MachineOperand,4> Addr,
+                       const TargetRegisterClass *RC,
+                       SmallVector<MachineInstr*, 4> &NewMIs) const;
+
   void copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
                     unsigned DestReg, unsigned SrcReg,
                     const TargetRegisterClass *DestRC,
diff --git a/lib/Target/Alpha/AlphaRegisterInfo.cpp b/lib/Target/Alpha/AlphaRegisterInfo.cpp
index 08c4c94..7959483 100644
--- a/lib/Target/Alpha/AlphaRegisterInfo.cpp
+++ b/lib/Target/Alpha/AlphaRegisterInfo.cpp
@@ -82,6 +82,31 @@ AlphaRegisterInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
     abort();
 }
 
+void AlphaRegisterInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
+                                       SmallVector<MachineOperand,4> Addr,
+                                       const TargetRegisterClass *RC,
+                                  SmallVector<MachineInstr*, 4> &NewMIs) const {
+  unsigned Opc = 0;
+  if (RC == Alpha::F4RCRegisterClass)
+    Opc = Alpha::STS;
+  else if (RC == Alpha::F8RCRegisterClass)
+    Opc = Alpha::STT;
+  else if (RC == Alpha::GPRCRegisterClass)
+    Opc = Alpha::STQ;
+  else
+    abort();
+  MachineInstrBuilder MIB = 
+    BuildMI(TII.get(Opc)).addReg(SrcReg, false, false, true);
+  for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
+    MachineOperand &MO = Addr[i];
+    if (MO.isRegister())
+      MIB.addReg(MO.getReg(), MO.isDef(), MO.isImplicit());
+    else
+      MIB.addImm(MO.getImm());
+  }
+  NewMIs.push_back(MIB);
+}
+
 void
 AlphaRegisterInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
                                         MachineBasicBlock::iterator MI,
@@ -102,6 +127,31 @@ AlphaRegisterInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
     abort();
 }
 
+void AlphaRegisterInfo::loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
+                                        SmallVector<MachineOperand,4> Addr,
+                                        const TargetRegisterClass *RC,
+                                  SmallVector<MachineInstr*, 4> &NewMIs) const {
+  unsigned Opc = 0;
+  if (RC == Alpha::F4RCRegisterClass)
+    Opc = Alpha::LDS;
+  else if (RC == Alpha::F8RCRegisterClass)
+    Opc = Alpha::LDT;
+  else if (RC == Alpha::GPRCRegisterClass)
+    Opc = Alpha::LDQ;
+  else
+    abort();
+  MachineInstrBuilder MIB = 
+    BuildMI(TII.get(Opc), DestReg);
+  for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
+    MachineOperand &MO = Addr[i];
+    if (MO.isRegister())
+      MIB.addReg(MO.getReg(), MO.isDef(), MO.isImplicit());
+    else
+      MIB.addImm(MO.getImm());
+  }
+  NewMIs.push_back(MIB);
+}
+
 MachineInstr *AlphaRegisterInfo::foldMemoryOperand(MachineInstr *MI,
                                                  unsigned OpNum,
                                                  int FrameIndex) const {
diff --git a/lib/Target/Alpha/AlphaRegisterInfo.h b/lib/Target/Alpha/AlphaRegisterInfo.h
index 573d6eb..c9bb2dd 100644
--- a/lib/Target/Alpha/AlphaRegisterInfo.h
+++ b/lib/Target/Alpha/AlphaRegisterInfo.h
@@ -33,11 +33,21 @@ struct AlphaRegisterInfo : public AlphaGenRegisterInfo {
                            unsigned SrcReg, int FrameIndex,
                            const TargetRegisterClass *RC) const;
 
+  void storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
+                      SmallVector<MachineOperand,4> Addr,
+                      const TargetRegisterClass *RC,
+                      SmallVector<MachineInstr*, 4> &NewMIs) const;
+
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MBBI,
                             unsigned DestReg, int FrameIndex,
                             const TargetRegisterClass *RC) const;
   
+  void loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
+                       SmallVector<MachineOperand,4> Addr,
+                       const TargetRegisterClass *RC,
+                       SmallVector<MachineInstr*, 4> &NewMIs) const;
+
   MachineInstr* foldMemoryOperand(MachineInstr *MI, unsigned OpNum, 
                                   int FrameIndex) const;
 
diff --git a/lib/Target/Mips/MipsRegisterInfo.cpp b/lib/Target/Mips/MipsRegisterInfo.cpp
index 68ad38a..8ab5e0e 100644
--- a/lib/Target/Mips/MipsRegisterInfo.cpp
+++ b/lib/Target/Mips/MipsRegisterInfo.cpp
@@ -95,6 +95,27 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
     assert(0 && "Can't store this register to stack slot");
 }
 
+void MipsRegisterInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
+                                      SmallVector<MachineOperand,4> Addr,
+                                      const TargetRegisterClass *RC,
+                                  SmallVector<MachineInstr*, 4> &NewMIs) const {
+  if (RC != Mips::CPURegsRegisterClass)
+    assert(0 && "Can't store this register");
+  MachineInstrBuilder MIB = BuildMI(TII.get(Mips::SW))
+    .addReg(SrcReg, false, false, true);
+  for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
+    MachineOperand &MO = Addr[i];
+    if (MO.isRegister())
+      MIB.addReg(MO.getReg());
+    else if (MO.isImmediate())
+      MIB.addImm(MO.getImmedValue());
+    else
+      MIB.addFrameIndex(MO.getFrameIndex());
+  }
+  NewMIs.push_back(MIB);
+  return;
+}
+
 void MipsRegisterInfo::
 loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                      unsigned DestReg, int FI,
@@ -106,6 +127,26 @@ loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
     assert(0 && "Can't load this register from stack slot");
 }
 
+void MipsRegisterInfo::loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
+                                       SmallVector<MachineOperand,4> Addr,
+                                       const TargetRegisterClass *RC,
+                                  SmallVector<MachineInstr*, 4> &NewMIs) const {
+  if (RC != Mips::CPURegsRegisterClass)
+    assert(0 && "Can't load this register");
+  MachineInstrBuilder MIB = BuildMI(TII.get(Mips::LW), DestReg);
+  for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
+    MachineOperand &MO = Addr[i];
+    if (MO.isRegister())
+      MIB.addReg(MO.getReg());
+    else if (MO.isImmediate())
+      MIB.addImm(MO.getImmedValue());
+    else
+      MIB.addFrameIndex(MO.getFrameIndex());
+  }
+  NewMIs.push_back(MIB);
+  return;
+}
+
 void MipsRegisterInfo::
 copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
              unsigned DestReg, unsigned SrcReg,
diff --git a/lib/Target/Mips/MipsRegisterInfo.h b/lib/Target/Mips/MipsRegisterInfo.h
index b992e2e..47d1fc2 100644
--- a/lib/Target/Mips/MipsRegisterInfo.h
+++ b/lib/Target/Mips/MipsRegisterInfo.h
@@ -37,11 +37,21 @@ struct MipsRegisterInfo : public MipsGenRegisterInfo {
                            unsigned SrcReg, int FrameIndex,
                            const TargetRegisterClass *RC) const;
 
+  void storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
+                      SmallVector<MachineOperand,4> Addr,
+                      const TargetRegisterClass *RC,
+                      SmallVector<MachineInstr*, 4> &NewMIs) const;
+
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
               MachineBasicBlock::iterator MBBI,
               unsigned DestReg, int FrameIndex,
               const TargetRegisterClass *RC) const;
 
+  void loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
+                       SmallVector<MachineOperand,4> Addr,
+                       const TargetRegisterClass *RC,
+                       SmallVector<MachineInstr*, 4> &NewMIs) const;
+
   void reMaterialize(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
                      unsigned DestReg, const MachineInstr *Orig) const;
 
diff --git a/lib/Target/PowerPC/PPCRegisterInfo.cpp b/lib/Target/PowerPC/PPCRegisterInfo.cpp
index 158111b..76ad6fd0 100644
--- a/lib/Target/PowerPC/PPCRegisterInfo.cpp
+++ b/lib/Target/PowerPC/PPCRegisterInfo.cpp
@@ -103,68 +103,67 @@ PPCRegisterInfo::PPCRegisterInfo(const PPCSubtarget &ST,
   ImmToIdxMap[PPC::ADDI8] = PPC::ADD8; ImmToIdxMap[PPC::STD_32] = PPC::STDX_32;
 }
 
-void
-PPCRegisterInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
-                                     MachineBasicBlock::iterator MI,
-                                     unsigned SrcReg, int FrameIdx,
-                                     const TargetRegisterClass *RC) const {
+static void StoreRegToStackSlot(const TargetInstrInfo &TII,
+                                unsigned SrcReg, int FrameIdx,
+                                const TargetRegisterClass *RC,
+                                SmallVector<MachineInstr*, 4> &NewMIs) {
   if (RC == PPC::GPRCRegisterClass) {
     if (SrcReg != PPC::LR) {
-      addFrameReference(BuildMI(MBB, MI, TII.get(PPC::STW))
-                        .addReg(SrcReg, false, false, true), FrameIdx);
+      NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::STW))
+                                .addReg(SrcReg, false, false, true), FrameIdx));
     } else {
       // FIXME: this spills LR immediately to memory in one step.  To do this,
       // we use R11, which we know cannot be used in the prolog/epilog.  This is
       // a hack.
-      BuildMI(MBB, MI, TII.get(PPC::MFLR), PPC::R11);
-      addFrameReference(BuildMI(MBB, MI, TII.get(PPC::STW))
-                        .addReg(PPC::R11, false, false, true), FrameIdx);
+      NewMIs.push_back(BuildMI(TII.get(PPC::MFLR), PPC::R11));
+      NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::STW))
+                              .addReg(PPC::R11, false, false, true), FrameIdx));
     }
   } else if (RC == PPC::G8RCRegisterClass) {
     if (SrcReg != PPC::LR8) {
-      addFrameReference(BuildMI(MBB, MI, TII.get(PPC::STD))
-                        .addReg(SrcReg, false, false, true), FrameIdx);
+      NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::STD))
+                                .addReg(SrcReg, false, false, true), FrameIdx));
     } else {
       // FIXME: this spills LR immediately to memory in one step.  To do this,
       // we use R11, which we know cannot be used in the prolog/epilog.  This is
       // a hack.
-      BuildMI(MBB, MI, TII.get(PPC::MFLR8), PPC::X11);
-      addFrameReference(BuildMI(MBB, MI, TII.get(PPC::STD))
-                        .addReg(PPC::X11, false, false, true), FrameIdx);
+      NewMIs.push_back(BuildMI(TII.get(PPC::MFLR8), PPC::X11));
+      NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::STD))
+                              .addReg(PPC::X11, false, false, true), FrameIdx));
     }
   } else if (RC == PPC::F8RCRegisterClass) {
-    addFrameReference(BuildMI(MBB, MI, TII.get(PPC::STFD))
-                      .addReg(SrcReg, false, false, true), FrameIdx);
+    NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::STFD))
+                                .addReg(SrcReg, false, false, true), FrameIdx));
   } else if (RC == PPC::F4RCRegisterClass) {
-    addFrameReference(BuildMI(MBB, MI, TII.get(PPC::STFS))
-                      .addReg(SrcReg, false, false, true), FrameIdx);
+    NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::STFS))
+                                .addReg(SrcReg, false, false, true), FrameIdx));
   } else if (RC == PPC::CRRCRegisterClass) {
     // FIXME: We use R0 here, because it isn't available for RA.
     // We need to store the CR in the low 4-bits of the saved value.  First,
     // issue a MFCR to save all of the CRBits.
-    BuildMI(MBB, MI, TII.get(PPC::MFCR), PPC::R0);
+    NewMIs.push_back(BuildMI(TII.get(PPC::MFCR), PPC::R0));
     
     // If the saved register wasn't CR0, shift the bits left so that they are in
     // CR0's slot.
     if (SrcReg != PPC::CR0) {
       unsigned ShiftBits = PPCRegisterInfo::getRegisterNumbering(SrcReg)*4;
       // rlwinm r0, r0, ShiftBits, 0, 31.
-      BuildMI(MBB, MI, TII.get(PPC::RLWINM), PPC::R0)
-        .addReg(PPC::R0).addImm(ShiftBits).addImm(0).addImm(31);
+      NewMIs.push_back(BuildMI(TII.get(PPC::RLWINM), PPC::R0)
+                       .addReg(PPC::R0).addImm(ShiftBits).addImm(0).addImm(31));
     }
     
-    addFrameReference(BuildMI(MBB, MI, TII.get(PPC::STW))
-                      .addReg(PPC::R0, false, false, true), FrameIdx);
+    NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::STW))
+                               .addReg(PPC::R0, false, false, true), FrameIdx));
   } else if (RC == PPC::VRRCRegisterClass) {
     // We don't have indexed addressing for vector loads.  Emit:
     // R0 = ADDI FI#
     // STVX VAL, 0, R0
     // 
     // FIXME: We use R0 here, because it isn't available for RA.
-    addFrameReference(BuildMI(MBB, MI, TII.get(PPC::ADDI), PPC::R0),
-                      FrameIdx, 0, 0);
-    BuildMI(MBB, MI, TII.get(PPC::STVX))
-      .addReg(SrcReg, false, false, true).addReg(PPC::R0).addReg(PPC::R0);
+    NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::ADDI), PPC::R0),
+                                       FrameIdx, 0, 0));
+    NewMIs.push_back(BuildMI(TII.get(PPC::STVX))
+           .addReg(SrcReg, false, false, true).addReg(PPC::R0).addReg(PPC::R0));
   } else {
     assert(0 && "Unknown regclass!");
     abort();
@@ -172,55 +171,163 @@ PPCRegisterInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
 }
 
 void
-PPCRegisterInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
-                                      MachineBasicBlock::iterator MI,
-                                      unsigned DestReg, int FrameIdx,
-                                      const TargetRegisterClass *RC) const {
+PPCRegisterInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
+                                     MachineBasicBlock::iterator MI,
+                                     unsigned SrcReg, int FrameIdx,
+                                     const TargetRegisterClass *RC) const {
+  SmallVector<MachineInstr*, 4> NewMIs;
+  StoreRegToStackSlot(TII, SrcReg, FrameIdx, RC, NewMIs);
+  for (unsigned i = 0, e = NewMIs.size(); i != e; ++i)
+    MBB.insert(MI, NewMIs[i]);
+}
+
+void PPCRegisterInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
+                                     SmallVector<MachineOperand,4> Addr,
+                                     const TargetRegisterClass *RC,
+                                  SmallVector<MachineInstr*, 4> &NewMIs) const {
+  if (Addr[0].isFrameIndex()) {
+    StoreRegToStackSlot(TII, SrcReg, Addr[0].getFrameIndex(), RC, NewMIs);
+    return;
+  }
+
+  unsigned Opc = 0;
+  if (RC == PPC::GPRCRegisterClass) {
+    Opc = PPC::STW;
+  } else if (RC == PPC::G8RCRegisterClass) {
+    Opc = PPC::STD;
+  } else if (RC == PPC::F8RCRegisterClass) {
+    Opc = PPC::STFD;
+  } else if (RC == PPC::F4RCRegisterClass) {
+    Opc = PPC::STFS;
+  } else if (RC == PPC::VRRCRegisterClass) {
+    Opc = PPC::STVX;
+  } else {
+    assert(0 && "Unknown regclass!");
+    abort();
+  }
+  MachineInstrBuilder MIB = BuildMI(TII.get(Opc))
+    .addReg(SrcReg, false, false, true);
+  for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
+    MachineOperand &MO = Addr[i];
+    if (MO.isRegister())
+      MIB.addReg(MO.getReg());
+    else if (MO.isImmediate())
+      MIB.addImm(MO.getImmedValue());
+    else
+      MIB.addFrameIndex(MO.getFrameIndex());
+  }
+  NewMIs.push_back(MIB);
+  return;
+}
+
+static void LoadRegFromStackSlot(const TargetInstrInfo &TII,
+                                 unsigned DestReg, int FrameIdx,
+                                 const TargetRegisterClass *RC,
+                                 SmallVector<MachineInstr*, 4> &NewMIs) {
   if (RC == PPC::GPRCRegisterClass) {
     if (DestReg != PPC::LR) {
-      addFrameReference(BuildMI(MBB, MI, TII.get(PPC::LWZ), DestReg), FrameIdx);
+      NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::LWZ), DestReg),
+                                         FrameIdx));
     } else {
-      addFrameReference(BuildMI(MBB, MI, TII.get(PPC::LWZ), PPC::R11),FrameIdx);
-      BuildMI(MBB, MI, TII.get(PPC::MTLR)).addReg(PPC::R11);
+      NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::LWZ), PPC::R11),
+                                         FrameIdx));
+      NewMIs.push_back(BuildMI(TII.get(PPC::MTLR)).addReg(PPC::R11));
     }
   } else if (RC == PPC::G8RCRegisterClass) {
     if (DestReg != PPC::LR8) {
-      addFrameReference(BuildMI(MBB, MI, TII.get(PPC::LD), DestReg), FrameIdx);
+      NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::LD), DestReg),
+                                         FrameIdx));
     } else {
-      addFrameReference(BuildMI(MBB, MI, TII.get(PPC::LD), PPC::R11), FrameIdx);
-      BuildMI(MBB, MI, TII.get(PPC::MTLR8)).addReg(PPC::R11);
+      NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::LD), PPC::R11),
+                                         FrameIdx));
+      NewMIs.push_back(BuildMI(TII.get(PPC::MTLR8)).addReg(PPC::R11));
     }
   } else if (RC == PPC::F8RCRegisterClass) {
-    addFrameReference(BuildMI(MBB, MI, TII.get(PPC::LFD), DestReg), FrameIdx);
+    NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::LFD), DestReg),
+                                       FrameIdx));
   } else if (RC == PPC::F4RCRegisterClass) {
-    addFrameReference(BuildMI(MBB, MI, TII.get(PPC::LFS), DestReg), FrameIdx);
+    NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::LFS), DestReg),
+                                       FrameIdx));
   } else if (RC == PPC::CRRCRegisterClass) {
     // FIXME: We use R0 here, because it isn't available for RA.
-    addFrameReference(BuildMI(MBB, MI, TII.get(PPC::LWZ), PPC::R0), FrameIdx);
+    NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::LWZ), PPC::R0),
+                                       FrameIdx));
     
     // If the reloaded register isn't CR0, shift the bits right so that they are
     // in the right CR's slot.
     if (DestReg != PPC::CR0) {
       unsigned ShiftBits = PPCRegisterInfo::getRegisterNumbering(DestReg)*4;
       // rlwinm r11, r11, 32-ShiftBits, 0, 31.
-      BuildMI(MBB, MI, TII.get(PPC::RLWINM), PPC::R0)
-        .addReg(PPC::R0).addImm(32-ShiftBits).addImm(0).addImm(31);
+      NewMIs.push_back(BuildMI(TII.get(PPC::RLWINM), PPC::R0)
+                    .addReg(PPC::R0).addImm(32-ShiftBits).addImm(0).addImm(31));
     }
     
-    BuildMI(MBB, MI, TII.get(PPC::MTCRF), DestReg).addReg(PPC::R0);
+    NewMIs.push_back(BuildMI(TII.get(PPC::MTCRF), DestReg).addReg(PPC::R0));
   } else if (RC == PPC::VRRCRegisterClass) {
     // We don't have indexed addressing for vector loads.  Emit:
     // R0 = ADDI FI#
     // Dest = LVX 0, R0
     // 
     // FIXME: We use R0 here, because it isn't available for RA.
-    addFrameReference(BuildMI(MBB, MI, TII.get(PPC::ADDI), PPC::R0),
-                      FrameIdx, 0, 0);
-    BuildMI(MBB, MI, TII.get(PPC::LVX),DestReg).addReg(PPC::R0).addReg(PPC::R0);
+    NewMIs.push_back(addFrameReference(BuildMI(TII.get(PPC::ADDI), PPC::R0),
+                                       FrameIdx, 0, 0));
+    NewMIs.push_back(BuildMI(TII.get(PPC::LVX),DestReg).addReg(PPC::R0)
+                     .addReg(PPC::R0));
+  } else {
+    assert(0 && "Unknown regclass!");
+    abort();
+  }
+}
+
+void
+PPCRegisterInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
+                                      MachineBasicBlock::iterator MI,
+                                      unsigned DestReg, int FrameIdx,
+                                      const TargetRegisterClass *RC) const {
+  SmallVector<MachineInstr*, 4> NewMIs;
+  LoadRegFromStackSlot(TII, DestReg, FrameIdx, RC, NewMIs);
+  for (unsigned i = 0, e = NewMIs.size(); i != e; ++i)
+    MBB.insert(MI, NewMIs[i]);
+}
+
+void PPCRegisterInfo::loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
+                                      SmallVector<MachineOperand,4> Addr,
+                                      const TargetRegisterClass *RC,
+                                  SmallVector<MachineInstr*, 4> &NewMIs) const {
+  if (Addr[0].isFrameIndex()) {
+    LoadRegFromStackSlot(TII, DestReg, Addr[0].getFrameIndex(), RC, NewMIs);
+    return;
+  }
+
+  unsigned Opc = 0;
+  if (RC == PPC::GPRCRegisterClass) {
+    assert(DestReg != PPC::LR && "Can't handle this yet!");
+    Opc = PPC::LWZ;
+  } else if (RC == PPC::G8RCRegisterClass) {
+    assert(DestReg != PPC::LR8 && "Can't handle this yet!");
+    Opc = PPC::LD;
+  } else if (RC == PPC::F8RCRegisterClass) {
+    Opc = PPC::LFD;
+  } else if (RC == PPC::F4RCRegisterClass) {
+    Opc = PPC::LFS;
+  } else if (RC == PPC::VRRCRegisterClass) {
+    Opc = PPC::LVX;
   } else {
     assert(0 && "Unknown regclass!");
     abort();
   }
+  MachineInstrBuilder MIB = BuildMI(TII.get(Opc), DestReg);
+  for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
+    MachineOperand &MO = Addr[i];
+    if (MO.isRegister())
+      MIB.addReg(MO.getReg());
+    else if (MO.isImmediate())
+      MIB.addImm(MO.getImmedValue());
+    else
+      MIB.addFrameIndex(MO.getFrameIndex());
+  }
+  NewMIs.push_back(MIB);
+  return;
 }
 
 void PPCRegisterInfo::copyRegToReg(MachineBasicBlock &MBB,
diff --git a/lib/Target/PowerPC/PPCRegisterInfo.h b/lib/Target/PowerPC/PPCRegisterInfo.h
index 097d60c..e986c1b 100644
--- a/lib/Target/PowerPC/PPCRegisterInfo.h
+++ b/lib/Target/PowerPC/PPCRegisterInfo.h
@@ -40,11 +40,21 @@ public:
                            unsigned SrcReg, int FrameIndex,
                            const TargetRegisterClass *RC) const;
 
+  void storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
+                      SmallVector<MachineOperand,4> Addr,
+                      const TargetRegisterClass *RC,
+                      SmallVector<MachineInstr*, 4> &NewMIs) const;
+
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MBBI,
                             unsigned DestReg, int FrameIndex,
                             const TargetRegisterClass *RC) const;
 
+  void loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
+                       SmallVector<MachineOperand,4> Addr,
+                       const TargetRegisterClass *RC,
+                       SmallVector<MachineInstr*, 4> &NewMIs) const;
+
   void copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
                     unsigned DestReg, unsigned SrcReg,
                     const TargetRegisterClass *DestRC,
diff --git a/lib/Target/Sparc/SparcRegisterInfo.cpp b/lib/Target/Sparc/SparcRegisterInfo.cpp
index d3ea07b..7129f43 100644
--- a/lib/Target/Sparc/SparcRegisterInfo.cpp
+++ b/lib/Target/Sparc/SparcRegisterInfo.cpp
@@ -48,6 +48,34 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
     assert(0 && "Can't store this register to stack slot");
 }
 
+void SparcRegisterInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
+                                       SmallVector<MachineOperand,4> Addr,
+                                       const TargetRegisterClass *RC,
+                                  SmallVector<MachineInstr*, 4> &NewMIs) const {
+  unsigned Opc = 0;
+  if (RC == SP::IntRegsRegisterClass)
+    Opc = SP::STri;
+  else if (RC == SP::FPRegsRegisterClass)
+    Opc = SP::STFri;
+  else if (RC == SP::DFPRegsRegisterClass)
+    Opc = SP::STDFri;
+  else
+    assert(0 && "Can't load this register");
+  MachineInstrBuilder MIB = BuildMI(TII.get(Opc));
+  for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
+    MachineOperand &MO = Addr[i];
+    if (MO.isRegister())
+      MIB.addReg(MO.getReg());
+    else if (MO.isImmediate())
+      MIB.addImm(MO.getImmedValue());
+    else
+      MIB.addFrameIndex(MO.getFrameIndex());
+  }
+  MIB.addReg(SrcReg, false, false, true);
+  NewMIs.push_back(MIB);
+  return;
+}
+
 void SparcRegisterInfo::
 loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                      unsigned DestReg, int FI,
@@ -62,6 +90,33 @@ loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
     assert(0 && "Can't load this register from stack slot");
 }
 
+void SparcRegisterInfo::loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
+                                        SmallVector<MachineOperand,4> Addr,
+                                        const TargetRegisterClass *RC,
+                                  SmallVector<MachineInstr*, 4> &NewMIs) const {
+  unsigned Opc = 0;
+  if (RC == SP::IntRegsRegisterClass)
+    Opc = SP::LDri;
+  else if (RC == SP::FPRegsRegisterClass)
+    Opc = SP::LDFri;
+  else if (RC == SP::DFPRegsRegisterClass)
+    Opc = SP::LDDFri;
+  else
+    assert(0 && "Can't load this register");
+  MachineInstrBuilder MIB = BuildMI(TII.get(Opc), DestReg);
+  for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
+    MachineOperand &MO = Addr[i];
+    if (MO.isRegister())
+      MIB.addReg(MO.getReg());
+    else if (MO.isImmediate())
+      MIB.addImm(MO.getImmedValue());
+    else
+      MIB.addFrameIndex(MO.getFrameIndex());
+  }
+  NewMIs.push_back(MIB);
+  return;
+}
+
 void SparcRegisterInfo::copyRegToReg(MachineBasicBlock &MBB,
                                      MachineBasicBlock::iterator I,
                                      unsigned DestReg, unsigned SrcReg,
diff --git a/lib/Target/Sparc/SparcRegisterInfo.h b/lib/Target/Sparc/SparcRegisterInfo.h
index a0e6fc2..39cf616 100644
--- a/lib/Target/Sparc/SparcRegisterInfo.h
+++ b/lib/Target/Sparc/SparcRegisterInfo.h
@@ -35,11 +35,21 @@ struct SparcRegisterInfo : public SparcGenRegisterInfo {
                            unsigned SrcReg, int FrameIndex,
                            const TargetRegisterClass *RC) const;
 
+  void storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
+                      SmallVector<MachineOperand,4> Addr,
+                      const TargetRegisterClass *RC,
+                      SmallVector<MachineInstr*, 4> &NewMIs) const;
+
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MBBI,
                             unsigned DestReg, int FrameIndex,
                             const TargetRegisterClass *RC) const;
 
+  void loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
+                       SmallVector<MachineOperand,4> Addr,
+                       const TargetRegisterClass *RC,
+                       SmallVector<MachineInstr*, 4> &NewMIs) const;
+
   void copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
                     unsigned DestReg, unsigned SrcReg,
                     const TargetRegisterClass *DestRC,