Infrastructure for getting the machine code size of a function and an instruction...

[oota-llvm.git] / lib / Target / Mips / MipsRegisterInfo.cpp

diff --git a/lib/Target/Mips/MipsRegisterInfo.cpp b/lib/Target/Mips/MipsRegisterInfo.cpp
index 94cf59bb8bcf58cfb68370a8334cbcb8337d4f92..8d53eada528c090a537b46872215af46c9173b6b 100644 (file)
--- a/lib/Target/Mips/MipsRegisterInfo.cpp
+++ b/lib/Target/Mips/MipsRegisterInfo.cpp
@@ -2,12 +2,12 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Bruno Cardoso Lopes and is distributed under the 
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
-// This file contains the MIPS implementation of the MRegisterInfo class.
+// This file contains the MIPS implementation of the TargetRegisterInfo class.
 //
 //===----------------------------------------------------------------------===//
 
@@ -81,126 +81,7 @@ getRegisterNumbering(unsigned RegEnum)
     case Mips::RA   : return 31;
     default: assert(0 && "Unknown register number!");
   }    
-}
-
-void MipsRegisterInfo::
-storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-          unsigned SrcReg, int FI, 
-          const TargetRegisterClass *RC) const 
-{
-  if (RC == Mips::CPURegsRegisterClass)
-    BuildMI(MBB, I, TII.get(Mips::SW)).addReg(SrcReg, false, false, true)
-          .addImm(0).addFrameIndex(FI);
-  else
-    assert(0 && "Can't store this register to stack slot");
-}
-
-void MipsRegisterInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
-                                      SmallVectorImpl<MachineOperand> &Addr,
-                                      const TargetRegisterClass *RC,
-                                 SmallVectorImpl<MachineInstr*> &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,
-                     const TargetRegisterClass *RC) const 
-{
-  if (RC == Mips::CPURegsRegisterClass)
-    BuildMI(MBB, I, TII.get(Mips::LW), DestReg).addImm(0).addFrameIndex(FI);
-  else
-    assert(0 && "Can't load this register from stack slot");
-}
-
-void MipsRegisterInfo::loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
-                                       SmallVectorImpl<MachineOperand> &Addr,
-                                       const TargetRegisterClass *RC,
-                                 SmallVectorImpl<MachineInstr*> &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,
-             const TargetRegisterClass *DestRC,
-             const TargetRegisterClass *SrcRC) const
-{
-  if (DestRC != SrcRC) {
-    cerr << "Not yet supported!";
-    abort();
-  }
-
-  if (DestRC == Mips::CPURegsRegisterClass)
-    BuildMI(MBB, I, TII.get(Mips::ADDu), DestReg).addReg(Mips::ZERO)
-      .addReg(SrcReg);
-  else
-    assert (0 && "Can't copy this register");
-}
-
-void MipsRegisterInfo::reMaterialize(MachineBasicBlock &MBB, 
-                                      MachineBasicBlock::iterator I,
-                                      unsigned DestReg, 
-                                      const MachineInstr *Orig) const 
-{
-    MachineInstr *MI = Orig->clone();
-    MI->getOperand(0).setReg(DestReg);
-    MBB.insert(I, MI);
-}
-
-MachineInstr *MipsRegisterInfo::
-foldMemoryOperand(MachineInstr* MI, unsigned OpNum, int FI) const 
-{
-  MachineInstr *NewMI = NULL;
-
-  switch (MI->getOpcode()) 
-  {
-    case Mips::ADDu:
-      if ((MI->getOperand(0).isRegister()) &&
-        (MI->getOperand(1).isRegister()) && 
-        (MI->getOperand(1).getReg() == Mips::ZERO) &&
-        (MI->getOperand(2).isRegister())) 
-      {
-        if (OpNum == 0)    // COPY -> STORE
-          NewMI = BuildMI(TII.get(Mips::SW)).addFrameIndex(FI)
-                  .addImm(0).addReg(MI->getOperand(2).getReg());
-        else               // COPY -> LOAD
-          NewMI = BuildMI(TII.get(Mips::LW), MI->getOperand(0)
-                  .getReg()).addImm(0).addFrameIndex(FI);
-      }
-      break;
-  }
-
-  if (NewMI)
-    NewMI->copyKillDeadInfo(MI);
-  return NewMI;
+  return 0; // Not reached
 }
 
 //===----------------------------------------------------------------------===//
@@ -335,7 +216,7 @@ eliminateFrameIndex(MachineBasicBlock::iterator II, int SPAdj,
            "Instr doesn't have FrameIndex operand!");
   }
 
-  int FrameIndex = MI.getOperand(i).getFrameIndex();
+  int FrameIndex = MI.getOperand(i).getIndex();
   int stackSize  = MF.getFrameInfo()->getStackSize();
   int spOffset   = MF.getFrameInfo()->getObjectOffset(FrameIndex);
 
@@ -402,6 +283,9 @@ emitPrologue(MachineFunction &MF) const
     FPOffset = NumBytes;
     RAOffset = 0;
     NumBytes += 4;
+  } else {
+    // No calls and no fp.
+    RAOffset = FPOffset = 0;
   }
 
   MFI->setObjectOffset(MFI->CreateStackObject(4,4), FPOffset);