PowerPC 32-/64-bit split: Part II, 64-bit customizations on PowerPC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15851 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/PowerPC/PPC64.td

@@ -0,0 +1,43 @@
+//===- PPC64.td - Describe the PowerPC64 Target Machine ----*- tablegen -*-===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+//
+//===----------------------------------------------------------------------===//
+
+// Get the target-independent interfaces which we are implementing...
+//
+include "../Target.td"
+
+//===----------------------------------------------------------------------===//
+// Register File Description
+//===----------------------------------------------------------------------===//
+
+include "PPC32RegisterInfo.td"
+include "PowerPCInstrInfo.td"
+
+def PowerPCInstrInfo : InstrInfo {
+  let PHIInst  = PHI;
+
+  let TSFlagsFields = ["ArgCount", "Arg0Type", "Arg1Type", "Arg2Type", 
+                       "Arg3Type", "Arg4Type", "VMX", "PPC64"];
+  let TSFlagsShifts = [ 0, 3, 8, 13, 18, 23, 28, 29 ];
+}
+
+def PPC64 : Target {
+  // Pointers on PPC64 are 64-bits in size.
+  let PointerType = i64;
+
+  let CalleeSavedRegisters = [R1, R13, R14, R15, R16, R17, R18, R19,
+    R20, R21, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31, F14, F15,
+    F16, F17, F18, F19, F20, F21, F22, F23, F24, F25, F26, F27, F28, F29,
+    F30, F31, CR2, CR3, CR4, LR];
+
+  // Pull in Instruction Info:
+  let InstructionSet = PowerPCInstrInfo;
+}

lib/Target/PowerPC/PPC64AsmPrinter.cpp

@@ -24,7 +24,6 @@
 #include "llvm/CodeGen/MachineConstantPool.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
 #include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/Target/TargetMachine.h"
 #include "llvm/Support/Mangler.h"
 #include "Support/CommandLine.h"
 #include "Support/Debug.h"

lib/Target/PowerPC/PPC64ISelSimple.cpp

@@ -377,10 +377,10 @@ namespace {
     /// yet used.
     ///
     unsigned makeAnotherReg(const Type *Ty) {
-      assert(dynamic_cast<const PowerPCRegisterInfo*>(TM.getRegisterInfo()) &&
+      assert(dynamic_cast<const PPC64RegisterInfo*>(TM.getRegisterInfo()) &&
              "Current target doesn't have PPC reg info??");
-      const PowerPCRegisterInfo *PPCRI =
+      const PPC64RegisterInfo *PPCRI =
-        static_cast<const PowerPCRegisterInfo*>(TM.getRegisterInfo());
+        static_cast<const PPC64RegisterInfo*>(TM.getRegisterInfo());
       // Add the mapping of regnumber => reg class to MachineFunction
       const TargetRegisterClass *RC = PPCRI->getRegClassForType(Ty);
       return F->getSSARegMap()->createVirtualRegister(RC);
@@ -1288,7 +1288,7 @@ void ISel::visitBranchInst(BranchInst &BI) {
   } else {
     // Change to the inverse condition...
     if (BI.getSuccessor(1) != NextBB) {
-      Opcode = PowerPCInstrInfo::invertPPCBranchOpcode(Opcode);
+      Opcode = PPC64InstrInfo::invertPPCBranchOpcode(Opcode);
       BuildMI(BB, PPC::COND_BRANCH, 3).addReg(PPC::CR0).addImm(Opcode)
         .addMBB(MBBMap[BI.getSuccessor(1)])
         .addMBB(MBBMap[BI.getSuccessor(0)]);
@@ -1497,8 +1497,6 @@ void ISel::visitCallInst(CallInst &CI) {
     }
     // Emit a CALL instruction with PC-relative displacement.
     TheCall = BuildMI(PPC::CALLpcrel, 1).addGlobalAddress(F, true);
-    // Add it to the set of functions called to be used by the Printer
-    TM.CalledFunctions.insert(F);
   } else {  // Emit an indirect call through the CTR
     unsigned Reg = getReg(CI.getCalledValue());
     BuildMI(BB, PPC::MTCTR, 1).addReg(Reg);
@@ -1997,7 +1995,6 @@ void ISel::emitDivRemOperation(MachineBasicBlock *BB,
       Args.push_back(ValueRecord(Op0Reg, Type::FloatTy));
       Args.push_back(ValueRecord(Op1Reg, Type::FloatTy));
       doCall(ValueRecord(ResultReg, Type::FloatTy), TheCall, Args, false);
-      TM.CalledFunctions.insert(fmodfFn);
     }
     return;
   case cFP64:
@@ -2015,7 +2012,6 @@ void ISel::emitDivRemOperation(MachineBasicBlock *BB,
       Args.push_back(ValueRecord(Op0Reg, Type::DoubleTy));
       Args.push_back(ValueRecord(Op1Reg, Type::DoubleTy));
       doCall(ValueRecord(ResultReg, Type::DoubleTy), TheCall, Args, false);
-      TM.CalledFunctions.insert(fmodFn);
     }
     return;
   case cLong: {
@@ -2031,7 +2027,6 @@ void ISel::emitDivRemOperation(MachineBasicBlock *BB,
     Args.push_back(ValueRecord(Op0Reg, Type::LongTy));
     Args.push_back(ValueRecord(Op1Reg, Type::LongTy));
     doCall(ValueRecord(ResultReg, Type::LongTy), TheCall, Args, false);
-    TM.CalledFunctions.insert(Funcs[NameIdx]);
     return;
   }
   case cByte: case cShort: case cInt:
@@ -2401,7 +2396,6 @@ void ISel::emitCastOperation(MachineBasicBlock *MBB,
       MachineInstr *TheCall =
         BuildMI(PPC::CALLpcrel, 1).addGlobalAddress(floatFn, true);
       doCall(ValueRecord(DestReg, DestTy), TheCall, Args, false);
-      TM.CalledFunctions.insert(floatFn);
       return;
     }
     
@@ -2473,7 +2467,6 @@ void ISel::emitCastOperation(MachineBasicBlock *MBB,
       MachineInstr *TheCall =
         BuildMI(PPC::CALLpcrel, 1).addGlobalAddress(floatFn, true);
       doCall(ValueRecord(DestReg, DestTy), TheCall, Args, false);
-      TM.CalledFunctions.insert(floatFn);
       return;
     }
 
@@ -3041,7 +3034,6 @@ void ISel::visitMallocInst(MallocInst &I) {
   MachineInstr *TheCall = 
     BuildMI(PPC::CALLpcrel, 1).addGlobalAddress(mallocFn, true);
   doCall(ValueRecord(getReg(I), I.getType()), TheCall, Args, false);
-  TM.CalledFunctions.insert(mallocFn);
 }
 
 
@@ -3054,7 +3046,6 @@ void ISel::visitFreeInst(FreeInst &I) {
   MachineInstr *TheCall = 
     BuildMI(PPC::CALLpcrel, 1).addGlobalAddress(freeFn, true);
   doCall(ValueRecord(0, Type::VoidTy), TheCall, Args, false);
-  TM.CalledFunctions.insert(freeFn);
 }
    
 /// createPPC64ISelSimple - This pass converts an LLVM function into a machine

lib/Target/PowerPC/PPC64InstrInfo.cpp

@@ -0,0 +1,59 @@
+//===- PPC64InstrInfo.cpp - PowerPC64 Instruction Information ---*- C++ -*-===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+// This file contains the PowerPC implementation of the TargetInstrInfo class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "PowerPC.h"
+#include "PPC64InstrInfo.h"
+#include "PPC64GenInstrInfo.inc"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include <iostream>
+using namespace llvm;
+
+PPC64InstrInfo::PPC64InstrInfo()
+  : TargetInstrInfo(PPC64Insts, sizeof(PPC64Insts)/sizeof(PPC64Insts[0])) { }
+
+bool PPC64InstrInfo::isMoveInstr(const MachineInstr& MI,
+                                 unsigned& sourceReg,
+                                 unsigned& destReg) const {
+  MachineOpCode oc = MI.getOpcode();
+  if (oc == PPC::OR) {                      // or r1, r2, r2
+    assert(MI.getNumOperands() == 3 &&
+           MI.getOperand(0).isRegister() &&
+           MI.getOperand(1).isRegister() &&
+           MI.getOperand(2).isRegister() &&
+           "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).isRegister() &&
+           MI.getOperand(2).isImmediate() &&
+           "invalid PPC ADDI instruction!");
+    if (MI.getOperand(1).isRegister() && MI.getOperand(2).getImmedValue()==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).isRegister() &&
+           MI.getOperand(1).isRegister() &&
+           "invalid PPC FMR instruction");
+    sourceReg = MI.getOperand(1).getReg();
+    destReg = MI.getOperand(0).getReg();
+    return true;
+  }
+  return false;
+}

lib/Target/PowerPC/PPC64InstrInfo.h

@@ -0,0 +1,56 @@
+//===- PPC64InstrInfo.h - PowerPC64 Instruction Information -----*- C++ -*-===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+// This file contains the PowerPC64 implementation of the TargetInstrInfo class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef POWERPC64_INSTRUCTIONINFO_H
+#define POWERPC64_INSTRUCTIONINFO_H
+
+#include "PowerPCInstrInfo.h"
+#include "PPC64RegisterInfo.h"
+
+namespace llvm {
+
+class PPC64InstrInfo : public TargetInstrInfo {
+  const PPC64RegisterInfo RI;
+public:
+  PPC64InstrInfo();
+
+  /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info.  As
+  /// such, whenever a client has an instance of instruction info, it should
+  /// always be able to get register info as well (through this method).
+  ///
+  virtual const MRegisterInfo &getRegisterInfo() const { return RI; }
+
+  //
+  // Return true if the instruction is a register to register move and
+  // leave the source and dest operands in the passed parameters.
+  //
+  virtual bool isMoveInstr(const MachineInstr& MI,
+                           unsigned& sourceReg,
+                           unsigned& destReg) const;
+
+  static unsigned invertPPCBranchOpcode(unsigned Opcode) {
+    switch (Opcode) {
+    default: assert(0 && "Unknown PPC branch opcode!");
+    case PPC::BEQ: return PPC::BNE;
+    case PPC::BNE: return PPC::BEQ;
+    case PPC::BLT: return PPC::BGE;
+    case PPC::BGE: return PPC::BLT;
+    case PPC::BGT: return PPC::BLE;
+    case PPC::BLE: return PPC::BGT;
+    } 
+  }
+};
+
+}
+
+#endif

lib/Target/PowerPC/PPC64RegisterInfo.cpp

@@ -0,0 +1,317 @@
+//===- PPC64RegisterInfo.cpp - PowerPC64 Register Information ---*- C++ -*-===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+// This file contains the PowerPC64 implementation of the MRegisterInfo class.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "reginfo"
+#include "PowerPC.h"
+#include "PowerPCInstrBuilder.h"
+#include "PPC64RegisterInfo.h"
+#include "llvm/Constants.h"
+#include "llvm/Type.h"
+#include "llvm/CodeGen/ValueTypes.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/Target/TargetFrameInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetOptions.h"
+#include "Support/CommandLine.h"
+#include "Support/Debug.h"
+#include "Support/STLExtras.h"
+#include <cstdlib>
+#include <iostream>
+using namespace llvm;
+
+namespace llvm {
+  // Switch toggling compilation for AIX
+  extern cl::opt<bool> AIX;
+}
+
+PPC64RegisterInfo::PPC64RegisterInfo()
+  : PPC64GenRegisterInfo(PPC::ADJCALLSTACKDOWN, PPC::ADJCALLSTACKUP) {
+  ImmToIdxMap[PPC::LD]   = PPC::LDX;    ImmToIdxMap[PPC::STD]  = PPC::STDX;    
+  ImmToIdxMap[PPC::LBZ]  = PPC::LBZX;   ImmToIdxMap[PPC::STB]  = PPC::STBX;
+  ImmToIdxMap[PPC::LHZ]  = PPC::LHZX;   ImmToIdxMap[PPC::LHA]  = PPC::LHAX;
+  ImmToIdxMap[PPC::LWZ]  = PPC::LWZX;   ImmToIdxMap[PPC::LWA]  = PPC::LWAX;
+  ImmToIdxMap[PPC::LFS]  = PPC::LFSX;   ImmToIdxMap[PPC::LFD]  = PPC::LFDX;
+  ImmToIdxMap[PPC::STH]  = PPC::STHX;   ImmToIdxMap[PPC::STW]  = PPC::STWX;
+  ImmToIdxMap[PPC::STFS] = PPC::STFSX;  ImmToIdxMap[PPC::STFD] = PPC::STFDX;
+  ImmToIdxMap[PPC::ADDI] = PPC::ADD;
+}
+
+static unsigned getIdx(const TargetRegisterClass *RC) {
+  if (RC == PPC64::GPRCRegisterClass) {
+    switch (RC->getSize()) {
+      default: assert(0 && "Invalid data size!");
+      case 1:  return 0;
+      case 2:  return 1;
+      case 4:  return 2;
+      case 8:  return 3;         
+    }
+  } else if (RC == PPC64::FPRCRegisterClass) {
+    switch (RC->getSize()) {
+      default: assert(0 && "Invalid data size!");
+      case 4:  return 4;
+      case 8:  return 5;
+    }
+  }
+  std::cerr << "Invalid register class to getIdx()!\n";
+  abort();
+}
+
+void 
+PPC64RegisterInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
+                                       MachineBasicBlock::iterator MI,
+                                       unsigned SrcReg, int FrameIdx) const {
+  const TargetRegisterClass *RC = getRegClass(SrcReg);
+  static const unsigned Opcode[] = { 
+    PPC::STB, PPC::STH, PPC::STW, PPC::STD, PPC::STFS, PPC::STFD 
+  };
+
+  unsigned OC = Opcode[getIdx(RC)];
+  if (SrcReg == PPC::LR) {
+    BuildMI(MBB, MI, PPC::MFLR, 0, PPC::R11);
+    BuildMI(MBB, MI, PPC::IMPLICIT_DEF, 0, PPC::R0);
+    addFrameReference(BuildMI(MBB, MI, OC, 3).addReg(PPC::R11),FrameIdx);
+  } else {
+    BuildMI(MBB, MI, PPC::IMPLICIT_DEF, 0, PPC::R0);
+    addFrameReference(BuildMI(MBB, MI, OC, 3).addReg(SrcReg),FrameIdx);
+  }
+}
+
+void
+PPC64RegisterInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
+                                        MachineBasicBlock::iterator MI,
+                                        unsigned DestReg, int FrameIdx) const{
+  static const unsigned Opcode[] = { 
+    PPC::LBZ, PPC::LHZ, PPC::LWZ, PPC::LD, PPC::LFS, PPC::LFD 
+  };
+  const TargetRegisterClass *RC = getRegClass(DestReg);
+  unsigned OC = Opcode[getIdx(RC)];
+  if (DestReg == PPC::LR) {
+    BuildMI(MBB, MI, PPC::IMPLICIT_DEF, 0, PPC::R0);
+    addFrameReference(BuildMI(MBB, MI, OC, 2, PPC::R11), FrameIdx);
+    BuildMI(MBB, MI, PPC::MTLR, 1).addReg(PPC::R11);
+  } else {
+    BuildMI(MBB, MI, PPC::IMPLICIT_DEF, 0, PPC::R0);
+    addFrameReference(BuildMI(MBB, MI, OC, 2, DestReg), FrameIdx);
+  }
+}
+
+void PPC64RegisterInfo::copyRegToReg(MachineBasicBlock &MBB,
+                                     MachineBasicBlock::iterator MI,
+                                     unsigned DestReg, unsigned SrcReg,
+                                     const TargetRegisterClass *RC) const {
+  MachineInstr *I;
+
+  if (RC == PPC64::GPRCRegisterClass) {
+    BuildMI(MBB, MI, PPC::OR, 2, DestReg).addReg(SrcReg).addReg(SrcReg);
+  } else if (RC == PPC64::FPRCRegisterClass) {
+    BuildMI(MBB, MI, PPC::FMR, 1, DestReg).addReg(SrcReg);
+  } else { 
+    std::cerr << "Attempt to copy register that is not GPR or FPR";
+    abort();
+  }
+}
+
+//===----------------------------------------------------------------------===//
+// Stack Frame Processing methods
+//===----------------------------------------------------------------------===//
+
+// hasFP - Return true if the specified function should have a dedicated frame
+// pointer register.  This is true if the function has variable sized allocas or
+// if frame pointer elimination is disabled.
+//
+static bool hasFP(MachineFunction &MF) {
+  MachineFrameInfo *MFI = MF.getFrameInfo();
+  return MFI->hasVarSizedObjects();
+}
+
+void PPC64RegisterInfo::
+eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
+                              MachineBasicBlock::iterator I) const {
+  if (hasFP(MF)) {
+    // If we have a frame pointer, convert as follows:
+    // ADJCALLSTACKDOWN -> addi, r1, r1, -amount
+    // ADJCALLSTACKUP   -> addi, r1, r1, amount
+    MachineInstr *Old = I;
+    unsigned Amount = Old->getOperand(0).getImmedValue();
+    if (Amount != 0) {
+      // We need to keep the stack aligned properly.  To do this, we round the
+      // amount of space needed for the outgoing arguments up to the next
+      // alignment boundary.
+      unsigned Align = MF.getTarget().getFrameInfo()->getStackAlignment();
+      Amount = (Amount+Align-1)/Align*Align;
+      
+      // Replace the pseudo instruction with a new instruction...
+      if (Old->getOpcode() == PPC::ADJCALLSTACKDOWN) {
+        MBB.insert(I, BuildMI(PPC::ADDI, 2, PPC::R1).addReg(PPC::R1)
+                .addSImm(-Amount));
+      } else {
+        assert(Old->getOpcode() == PPC::ADJCALLSTACKUP);
+        MBB.insert(I, BuildMI(PPC::ADDI, 2, PPC::R1).addReg(PPC::R1)
+                .addSImm(Amount));
+      }
+    }
+  }
+  MBB.erase(I);
+}
+
+void
+PPC64RegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II) const {
+  unsigned i = 0;
+  MachineInstr &MI = *II;
+  MachineBasicBlock &MBB = *MI.getParent();
+  MachineFunction &MF = *MBB.getParent();
+  
+  while (!MI.getOperand(i).isFrameIndex()) {
+    ++i;
+    assert(i < MI.getNumOperands() && "Instr doesn't have FrameIndex operand!");
+  }
+
+  int FrameIndex = MI.getOperand(i).getFrameIndex();
+
+  // Replace the FrameIndex with base register with GPR1 (SP) or GPR31 (FP).
+  MI.SetMachineOperandReg(i, hasFP(MF) ? PPC::R31 : PPC::R1);
+
+  // Take into account whether it's an add or mem instruction
+  unsigned OffIdx = (i == 2) ? 1 : 2;
+
+  // Now add the frame object offset to the offset from r1.
+  int Offset = MF.getFrameInfo()->getObjectOffset(FrameIndex) +
+               MI.getOperand(OffIdx).getImmedValue();
+
+  // If we're not using a Frame Pointer that has been set to the value of the
+  // SP before having the stack size subtracted from it, then add the stack size
+  // to Offset to get the correct offset.
+  Offset += MF.getFrameInfo()->getStackSize();
+  
+  if (Offset > 32767 || Offset < -32768) {
+    // Insert a set of r0 with the full offset value before the ld, st, or add
+    MachineBasicBlock *MBB = MI.getParent();
+    MBB->insert(II, BuildMI(PPC::LIS, 1, PPC::R0).addSImm(Offset >> 16));
+    MBB->insert(II, BuildMI(PPC::ORI, 2, PPC::R0).addReg(PPC::R0)
+      .addImm(Offset));
+    // convert into indexed form of the instruction
+    // sth 0:rA, 1:imm 2:(rB) ==> sthx 0:rA, 2:rB, 1:r0
+    // addi 0:rA 1:rB, 2, imm ==> add 0:rA, 1:rB, 2:r0
+    unsigned NewOpcode = const_cast<std::map<unsigned, unsigned>& >(ImmToIdxMap)[MI.getOpcode()];
+    assert(NewOpcode && "No indexed form of load or store available!");
+    MI.setOpcode(NewOpcode);
+    MI.SetMachineOperandReg(1, MI.getOperand(i).getReg());
+    MI.SetMachineOperandReg(2, PPC::R0);
+  } else {
+    MI.SetMachineOperandConst(OffIdx,MachineOperand::MO_SignExtendedImmed,Offset);
+  }
+}
+
+
+void PPC64RegisterInfo::emitPrologue(MachineFunction &MF) const {
+  MachineBasicBlock &MBB = MF.front();   // Prolog goes in entry BB
+  MachineBasicBlock::iterator MBBI = MBB.begin();
+  MachineFrameInfo *MFI = MF.getFrameInfo();
+  MachineInstr *MI;
+  
+  // Get the number of bytes to allocate from the FrameInfo
+  unsigned NumBytes = MFI->getStackSize();
+
+  // If we have calls, we cannot use the red zone to store callee save registers
+  // and we must set up a stack frame, so calculate the necessary size here.
+  if (MFI->hasCalls()) {
+    // We reserve argument space for call sites in the function immediately on 
+    // entry to the current function.  This eliminates the need for add/sub 
+    // brackets around call sites.
+    NumBytes += MFI->getMaxCallFrameSize();
+  }
+
+  // Do we need to allocate space on the stack?
+  if (NumBytes == 0) return;
+
+  // Add the size of R1 to  NumBytes size for the store of R1 to the bottom 
+  // of the stack and round the size to a multiple of the alignment.
+  unsigned Align = MF.getTarget().getFrameInfo()->getStackAlignment();
+  unsigned R1Size = getRegClass(PPC::R1)->getSize();
+  unsigned R31Size = getRegClass(PPC::R31)->getSize();
+  unsigned Size = (hasFP(MF)) ? R1Size + R31Size : R1Size;
+  NumBytes = (NumBytes+Size+Align-1)/Align*Align;
+
+  // Update frame info to pretend that this is part of the stack...
+  MFI->setStackSize(NumBytes);
+
+  // adjust stack pointer: r1 -= numbytes
+  if (NumBytes <= 32768) {
+    MI=BuildMI(PPC::STDU,3).addReg(PPC::R1).addSImm(-NumBytes).addReg(PPC::R1);
+    MBB.insert(MBBI, MI);
+  } else {
+    int NegNumbytes = -NumBytes;
+    MI = BuildMI(PPC::LIS, 1, PPC::R0).addSImm(NegNumbytes >> 16);
+    MBB.insert(MBBI, MI);
+    MI = BuildMI(PPC::ORI, 2, PPC::R0).addReg(PPC::R0)
+      .addImm(NegNumbytes & 0xFFFF);
+    MBB.insert(MBBI, MI);
+    MI = BuildMI(PPC::STDUX, 3).addReg(PPC::R1).addReg(PPC::R1).addReg(PPC::R0);
+    MBB.insert(MBBI, MI);
+  }
+  
+  if (hasFP(MF)) {
+    MI = BuildMI(PPC::STD, 3).addReg(PPC::R31).addSImm(R1Size).addReg(PPC::R1);
+    MBB.insert(MBBI, MI);
+    MI = BuildMI(PPC::OR, 2, PPC::R31).addReg(PPC::R1).addReg(PPC::R1);
+    MBB.insert(MBBI, MI);
+  }
+}
+
+void PPC64RegisterInfo::emitEpilogue(MachineFunction &MF,
+                                     MachineBasicBlock &MBB) const {
+  const MachineFrameInfo *MFI = MF.getFrameInfo();
+  MachineBasicBlock::iterator MBBI = prior(MBB.end());
+  MachineInstr *MI;
+  assert(MBBI->getOpcode() == PPC::BLR &&
+         "Can only insert epilog into returning blocks");
+  
+  // Get the number of bytes allocated from the FrameInfo...
+  unsigned NumBytes = MFI->getStackSize();
+
+  if (NumBytes != 0) {
+    if (hasFP(MF)) {
+      MI = BuildMI(PPC::OR, 2, PPC::R1).addReg(PPC::R31).addReg(PPC::R31);
+      MBB.insert(MBBI, MI);
+      MI = BuildMI(PPC::LD, 2, PPC::R31).addSImm(4).addReg(PPC::R31);
+      MBB.insert(MBBI, MI);
+    }
+    MI = BuildMI(PPC::LD, 2, PPC::R1).addSImm(0).addReg(PPC::R1);
+    MBB.insert(MBBI, MI);
+  }
+}
+
+#include "PPC64GenRegisterInfo.inc"
+
+const TargetRegisterClass*
+PPC64RegisterInfo::getRegClassForType(const Type* Ty) const {
+  switch (Ty->getTypeID()) {
+    default:              assert(0 && "Invalid type to getClass!");
+    case Type::BoolTyID:
+    case Type::SByteTyID:
+    case Type::UByteTyID:
+    case Type::ShortTyID:
+    case Type::UShortTyID:
+    case Type::IntTyID:
+    case Type::UIntTyID:
+    case Type::PointerTyID:
+    case Type::LongTyID:
+    case Type::ULongTyID:  return &GPRCInstance;
+     
+    case Type::FloatTyID:
+    case Type::DoubleTyID: return &FPRCInstance;
+  }
+}
+

lib/Target/PowerPC/PPC64RegisterInfo.h

@@ -0,0 +1,56 @@
+//===- PPC64RegisterInfo.h - PowerPC64 Register Information Impl -*- C++ -*-==//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+// This file contains the PowerPC implementation of the MRegisterInfo class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef POWERPC64_REGISTERINFO_H
+#define POWERPC64_REGISTERINFO_H
+
+#include "PowerPC.h"
+#include "PPC64GenRegisterInfo.h.inc"
+#include <map>
+
+namespace llvm {
+
+class Type;
+
+class PPC64RegisterInfo : public PPC64GenRegisterInfo {
+  std::map<unsigned, unsigned> ImmToIdxMap;
+public:
+  PPC64RegisterInfo();
+  const TargetRegisterClass* getRegClassForType(const Type* Ty) const;
+
+  /// Code Generation virtual methods...
+  void storeRegToStackSlot(MachineBasicBlock &MBB,
+                           MachineBasicBlock::iterator MBBI,
+                           unsigned SrcReg, int FrameIndex) const;
+
+  void loadRegFromStackSlot(MachineBasicBlock &MBB,
+                            MachineBasicBlock::iterator MBBI,
+                            unsigned DestReg, int FrameIndex) const;
+  
+  void copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
+                    unsigned DestReg, unsigned SrcReg,
+                    const TargetRegisterClass *RC) const;
+
+  void eliminateCallFramePseudoInstr(MachineFunction &MF,
+                                     MachineBasicBlock &MBB,
+                                     MachineBasicBlock::iterator I) const;
+
+  void eliminateFrameIndex(MachineBasicBlock::iterator II) const;
+
+  void emitPrologue(MachineFunction &MF) const;
+  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
+};
+
+} // end namespace llvm
+
+#endif

lib/Target/PowerPC/PPC64RegisterInfo.td

@@ -0,0 +1,40 @@
+//===- PPC64RegisterInfo.td - The PowerPC64 Register File --*- tablegen -*-===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+//
+//===----------------------------------------------------------------------===//
+
+include "PowerPCRegisterInfo.td"
+
+/// Register classes
+// Allocate volatiles first
+// then nonvolatiles in reverse order since stmw/lmw save from rN to r31
+def GPRC : RegisterClass<i64, 8,
+     [R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12,
+      R31, R30, R29, R28, R27, R26, R25, R24, R23, R22, R21, R20, R19, R18, R17,
+      R16, R15, R14, R13, R0, R1, LR]>
+{
+  let Methods = [{
+    iterator allocation_order_begin(MachineFunction &MF) const {
+      return begin() + (AIX ? 1 : 0);
+    }
+    iterator allocation_order_end(MachineFunction &MF) const {
+      if (hasFP(MF))
+        return end()-4;
+      else
+        return end()-3;
+    }
+  }];
+}
+
+def FPRC : RegisterClass<f64, 8, [F0, F1, F2, F3, F4, F5, F6, F7,
+  F8, F9, F10, F11, F12, F13, F14, F15, F16, F17, F18, F19, F20, F21,
+  F22, F23, F24, F25, F26, F27, F28, F29, F30, F31]>;
+
+def CRRC : RegisterClass<i32, 4, [CR0, CR1, CR2, CR3, CR4, CR5, CR6, CR7]>;

lib/Target/PowerPC/PPC64TargetMachine.h

@@ -1,4 +1,4 @@
-//===-- PPC64TargetMachine.h - Define AIX/PowerPC TargetMachine --*- C++ -*-=//
+//===-- PPC64TargetMachine.h - Define TargetMachine for PowerPC64 -*- C++ -*-=//
 // 
 //                     The LLVM Compiler Infrastructure
 //
@@ -7,31 +7,35 @@
 // 
 //===----------------------------------------------------------------------===//
 // 
-// This file declares the PowerPC/AIX specific subclass of TargetMachine.
+// This file declares the PowerPC specific subclass of TargetMachine.
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef POWERPC_AIX_TARGETMACHINE_H
+#ifndef POWERPC64_TARGETMACHINE_H
-#define POWERPC_AIX_TARGETMACHINE_H
+#define POWERPC64_TARGETMACHINE_H
 
 #include "PowerPCTargetMachine.h"
+#include "PPC64InstrInfo.h"
+#include "llvm/PassManager.h"
 
 namespace llvm {
 
+class IntrinsicLowering;
+
 class PPC64TargetMachine : public PowerPCTargetMachine {
+  PPC64InstrInfo InstrInfo;
+
 public:
   PPC64TargetMachine(const Module &M, IntrinsicLowering *IL);
+  virtual const PPC64InstrInfo   *getInstrInfo() const { return &InstrInfo; }
+  virtual const MRegisterInfo *getRegisterInfo() const {
+    return &InstrInfo.getRegisterInfo();
+  }
 
-  /// addPassesToEmitMachineCode - Add passes to the specified pass manager to
-  /// get machine code emitted.  This uses a MachineCodeEmitter object to handle
-  /// actually outputting the machine code and resolving things like the address
-  /// of functions.  This method should returns true if machine code emission is
-  /// not supported.
-  ///
-  virtual bool addPassesToEmitMachineCode(FunctionPassManager &PM,
-                                          MachineCodeEmitter &MCE);
-  
   static unsigned getModuleMatchQuality(const Module &M);
+
+  bool addPassesToEmitMachineCode(FunctionPassManager &PM,
+                                  MachineCodeEmitter &MCE);
 };
 
 } // end namespace llvm