First step of huge frame-related refactoring: move emit{Prologue,Epilogue} out of TargetRegisterInfo to TargetFrameInfo, which is definitely much better suitable place

llvm-svn: 119097

1 files changed, 0 insertions, 132 deletions

diff --git a/llvm/lib/Target/MSP430/MSP430RegisterInfo.cpp b/llvm/lib/Target/MSP430/MSP430RegisterInfo.cpp
index 3c3fa73477a..12acf9c3d59 100644
--- a/llvm/lib/Target/MSP430/MSP430RegisterInfo.cpp
+++ b/llvm/lib/Target/MSP430/MSP430RegisterInfo.cpp
@@ -233,138 +233,6 @@ MSP430RegisterInfo::processFunctionBeforeFrameFinalized(MachineFunction &MF)
   }
 }
 
-
-void MSP430RegisterInfo::emitPrologue(MachineFunction &MF) const {
-  MachineBasicBlock &MBB = MF.front();   // Prolog goes in entry BB
-  MachineFrameInfo *MFI = MF.getFrameInfo();
-  MSP430MachineFunctionInfo *MSP430FI = MF.getInfo<MSP430MachineFunctionInfo>();
-  MachineBasicBlock::iterator MBBI = MBB.begin();
-  DebugLoc DL = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
-
-  // Get the number of bytes to allocate from the FrameInfo.
-  uint64_t StackSize = MFI->getStackSize();
-
-  uint64_t NumBytes = 0;
-  if (hasFP(MF)) {
-    // Calculate required stack adjustment
-    uint64_t FrameSize = StackSize - 2;
-    NumBytes = FrameSize - MSP430FI->getCalleeSavedFrameSize();
-
-    // Get the offset of the stack slot for the EBP register... which is
-    // guaranteed to be the last slot by processFunctionBeforeFrameFinalized.
-    // Update the frame offset adjustment.
-    MFI->setOffsetAdjustment(-NumBytes);
-
-    // Save FPW into the appropriate stack slot...
-    BuildMI(MBB, MBBI, DL, TII.get(MSP430::PUSH16r))
-      .addReg(MSP430::FPW, RegState::Kill);
-
-    // Update FPW with the new base value...
-    BuildMI(MBB, MBBI, DL, TII.get(MSP430::MOV16rr), MSP430::FPW)
-      .addReg(MSP430::SPW);
-
-    // Mark the FramePtr as live-in in every block except the entry.
-    for (MachineFunction::iterator I = llvm::next(MF.begin()), E = MF.end();
-         I != E; ++I)
-      I->addLiveIn(MSP430::FPW);
-
-  } else
-    NumBytes = StackSize - MSP430FI->getCalleeSavedFrameSize();
-
-  // Skip the callee-saved push instructions.
-  while (MBBI != MBB.end() && (MBBI->getOpcode() == MSP430::PUSH16r))
-    ++MBBI;
-
-  if (MBBI != MBB.end())
-    DL = MBBI->getDebugLoc();
-
-  if (NumBytes) { // adjust stack pointer: SPW -= numbytes
-    // If there is an SUB16ri of SPW immediately before this instruction, merge
-    // the two.
-    //NumBytes -= mergeSPUpdates(MBB, MBBI, true);
-    // If there is an ADD16ri or SUB16ri of SPW immediately after this
-    // instruction, merge the two instructions.
-    // mergeSPUpdatesDown(MBB, MBBI, &NumBytes);
-
-    if (NumBytes) {
-      MachineInstr *MI =
-        BuildMI(MBB, MBBI, DL, TII.get(MSP430::SUB16ri), MSP430::SPW)
-        .addReg(MSP430::SPW).addImm(NumBytes);
-      // The SRW implicit def is dead.
-      MI->getOperand(3).setIsDead();
-    }
-  }
-}
-
-void MSP430RegisterInfo::emitEpilogue(MachineFunction &MF,
-                                      MachineBasicBlock &MBB) const {
-  const MachineFrameInfo *MFI = MF.getFrameInfo();
-  MSP430MachineFunctionInfo *MSP430FI = MF.getInfo<MSP430MachineFunctionInfo>();
-  MachineBasicBlock::iterator MBBI = prior(MBB.end());
-  unsigned RetOpcode = MBBI->getOpcode();
-  DebugLoc DL = MBBI->getDebugLoc();
-
-  switch (RetOpcode) {
-  case MSP430::RET:
-  case MSP430::RETI: break;  // These are ok
-  default:
-    llvm_unreachable("Can only insert epilog into returning blocks");
-  }
-
-  // Get the number of bytes to allocate from the FrameInfo
-  uint64_t StackSize = MFI->getStackSize();
-  unsigned CSSize = MSP430FI->getCalleeSavedFrameSize();
-  uint64_t NumBytes = 0;
-
-  if (hasFP(MF)) {
-    // Calculate required stack adjustment
-    uint64_t FrameSize = StackSize - 2;
-    NumBytes = FrameSize - CSSize;
-
-    // pop FPW.
-    BuildMI(MBB, MBBI, DL, TII.get(MSP430::POP16r), MSP430::FPW);
-  } else
-    NumBytes = StackSize - CSSize;
-
-  // Skip the callee-saved pop instructions.
-  while (MBBI != MBB.begin()) {
-    MachineBasicBlock::iterator PI = prior(MBBI);
-    unsigned Opc = PI->getOpcode();
-    if (Opc != MSP430::POP16r && !PI->getDesc().isTerminator())
-      break;
-    --MBBI;
-  }
-
-  DL = MBBI->getDebugLoc();
-
-  // If there is an ADD16ri or SUB16ri of SPW immediately before this
-  // instruction, merge the two instructions.
-  //if (NumBytes || MFI->hasVarSizedObjects())
-  //  mergeSPUpdatesUp(MBB, MBBI, StackPtr, &NumBytes);
-
-  if (MFI->hasVarSizedObjects()) {
-    BuildMI(MBB, MBBI, DL,
-            TII.get(MSP430::MOV16rr), MSP430::SPW).addReg(MSP430::FPW);
-    if (CSSize) {
-      MachineInstr *MI =
-        BuildMI(MBB, MBBI, DL,
-                TII.get(MSP430::SUB16ri), MSP430::SPW)
-        .addReg(MSP430::SPW).addImm(CSSize);
-      // The SRW implicit def is dead.
-      MI->getOperand(3).setIsDead();
-    }
-  } else {
-    // adjust stack pointer back: SPW += numbytes
-    if (NumBytes) {
-      MachineInstr *MI =
-        BuildMI(MBB, MBBI, DL, TII.get(MSP430::ADD16ri), MSP430::SPW)
-        .addReg(MSP430::SPW).addImm(NumBytes);
-      // The SRW implicit def is dead.
-      MI->getOperand(3).setIsDead();
-    }
-  }
-}
-
 unsigned MSP430RegisterInfo::getRARegister() const {
   return MSP430::PCW;
 }