Reformat.

[oota-llvm.git] / lib / Target / PowerPC / PPCRegisterInfo.cpp

diff --git a/lib/Target/PowerPC/PPCRegisterInfo.cpp b/lib/Target/PowerPC/PPCRegisterInfo.cpp
index 656376c641aa977fc33c00fd8626d7be6218bd8f..137e91f72fcea7b46c396612ea0b726fb6c5b3f9 100644 (file)
--- a/lib/Target/PowerPC/PPCRegisterInfo.cpp
+++ b/lib/Target/PowerPC/PPCRegisterInfo.cpp
@@ -165,8 +165,7 @@ void PPCRegisterInfo::adjustStackMapLiveOutMask(uint32_t *Mask) const {
 BitVector PPCRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
   BitVector Reserved(getNumRegs());
   const PPCSubtarget &Subtarget = MF.getSubtarget<PPCSubtarget>();
-  const PPCFrameLowering *PPCFI =
-      static_cast<const PPCFrameLowering *>(Subtarget.getFrameLowering());
+  const PPCFrameLowering *TFI = getFrameLowering(MF);
 
   // The ZERO register is not really a register, but the representation of r0
   // when used in instructions that treat r0 as the constant 0.
@@ -209,7 +208,7 @@ BitVector PPCRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
     Reserved.set(PPC::X1);
     Reserved.set(PPC::X13);
 
-    if (PPCFI->needsFP(MF))
+    if (TFI->needsFP(MF))
       Reserved.set(PPC::X31);
 
     if (hasBasePointer(MF))
@@ -230,7 +229,7 @@ BitVector PPCRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
     }
   }
 
-  if (PPCFI->needsFP(MF))
+  if (TFI->needsFP(MF))
     Reserved.set(PPC::R31);
 
   if (hasBasePointer(MF)) {
@@ -256,8 +255,7 @@ BitVector PPCRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
 
 unsigned PPCRegisterInfo::getRegPressureLimit(const TargetRegisterClass *RC,
                                               MachineFunction &MF) const {
-  const PPCSubtarget &Subtarget = MF.getSubtarget<PPCSubtarget>();
-  const TargetFrameLowering *TFI = Subtarget.getFrameLowering();
+  const PPCFrameLowering *TFI = getFrameLowering(MF);
   const unsigned DefaultSafety = 1;
 
   switch (RC->getID()) {
@@ -341,7 +339,8 @@ void PPCRegisterInfo::lowerDynamicAlloc(MachineBasicBlock::iterator II) const {
   unsigned FrameSize = MFI->getStackSize();
   
   // Get stack alignments.
-  unsigned TargetAlign = Subtarget.getFrameLowering()->getStackAlignment();
+  const PPCFrameLowering *TFI = getFrameLowering(MF);
+  unsigned TargetAlign = TFI->getStackAlignment();
   unsigned MaxAlign = MFI->getMaxAlignment();
   assert((maxCallFrameSize & (MaxAlign-1)) == 0 &&
          "Maximum call-frame size not sufficiently aligned");
@@ -460,8 +459,8 @@ void PPCRegisterInfo::lowerCRSpilling(MachineBasicBlock::iterator II,
   // We need to store the CR in the low 4-bits of the saved value. First, issue
   // an MFOCRF to save all of the CRBits and, if needed, kill the SrcReg.
   BuildMI(MBB, II, dl, TII.get(LP64 ? PPC::MFOCRF8 : PPC::MFOCRF), Reg)
-          .addReg(SrcReg, getKillRegState(MI.getOperand(0).isKill()));
-    
+      .addReg(SrcReg, getKillRegState(MI.getOperand(0).isKill()));
+
   // If the saved register wasn't CR0, shift the bits left so that they are in
   // CR0's slot.
   if (SrcReg != PPC::CR0) {
@@ -550,8 +549,8 @@ void PPCRegisterInfo::lowerCRBitSpilling(MachineBasicBlock::iterator II,
           .addReg(SrcReg, getKillRegState(MI.getOperand(0).isKill()));
 
   BuildMI(MBB, II, dl, TII.get(LP64 ? PPC::MFOCRF8 : PPC::MFOCRF), Reg)
-          .addReg(getCRFromCRBit(SrcReg));
-    
+      .addReg(getCRFromCRBit(SrcReg));
+
   // If the saved register wasn't CR0LT, shift the bits left so that the bit to
   // store is the first one. Mask all but that bit.
   unsigned Reg1 = Reg;
@@ -603,10 +602,12 @@ void PPCRegisterInfo::lowerCRBitRestore(MachineBasicBlock::iterator II,
   unsigned ShiftBits = getEncodingValue(DestReg);
   // rlwimi r11, r10, 32-ShiftBits, ..., ...
   BuildMI(MBB, II, dl, TII.get(LP64 ? PPC::RLWIMI8 : PPC::RLWIMI), RegO)
-           .addReg(RegO, RegState::Kill).addReg(Reg, RegState::Kill)
-           .addImm(ShiftBits ? 32-ShiftBits : 0)
-           .addImm(ShiftBits).addImm(ShiftBits);
-           
+      .addReg(RegO, RegState::Kill)
+      .addReg(Reg, RegState::Kill)
+      .addImm(ShiftBits ? 32 - ShiftBits : 0)
+      .addImm(ShiftBits)
+      .addImm(ShiftBits);
+
   BuildMI(MBB, II, dl, TII.get(LP64 ? PPC::MTOCRF8 : PPC::MTOCRF),
           getCRFromCRBit(DestReg))
             .addReg(RegO, RegState::Kill)
@@ -635,11 +636,11 @@ void PPCRegisterInfo::lowerVRSAVESpilling(MachineBasicBlock::iterator II,
   unsigned SrcReg = MI.getOperand(0).getReg();
 
   BuildMI(MBB, II, dl, TII.get(PPC::MFVRSAVEv), Reg)
-          .addReg(SrcReg, getKillRegState(MI.getOperand(0).isKill()));
-    
-  addFrameReference(BuildMI(MBB, II, dl, TII.get(PPC::STW))
-                    .addReg(Reg, RegState::Kill),
-                    FrameIndex);
+      .addReg(SrcReg, getKillRegState(MI.getOperand(0).isKill()));
+
+  addFrameReference(
+      BuildMI(MBB, II, dl, TII.get(PPC::STW)).addReg(Reg, RegState::Kill),
+      FrameIndex);
 
   // Discard the pseudo instruction.
   MBB.erase(II);
@@ -864,8 +865,7 @@ PPCRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
 }
 
 unsigned PPCRegisterInfo::getFrameRegister(const MachineFunction &MF) const {
-  const PPCSubtarget &Subtarget = MF.getSubtarget<PPCSubtarget>();
-  const TargetFrameLowering *TFI = Subtarget.getFrameLowering();
+  const PPCFrameLowering *TFI = getFrameLowering(MF);
 
   if (!TM.isPPC64())
     return TFI->hasFP(MF) ? PPC::R31 : PPC::R1;
@@ -900,24 +900,6 @@ bool PPCRegisterInfo::hasBasePointer(const MachineFunction &MF) const {
   return needsStackRealignment(MF);
 }
 
-bool PPCRegisterInfo::canRealignStack(const MachineFunction &MF) const {
-  if (MF.getFunction()->hasFnAttribute("no-realign-stack"))
-    return false;
-
-  return true;
-}
-
-bool PPCRegisterInfo::needsStackRealignment(const MachineFunction &MF) const {
-  const PPCSubtarget &Subtarget = MF.getSubtarget<PPCSubtarget>();
-  const MachineFrameInfo *MFI = MF.getFrameInfo();
-  const Function *F = MF.getFunction();
-  unsigned StackAlign = Subtarget.getFrameLowering()->getStackAlignment();
-  bool requiresRealignment = ((MFI->getMaxAlignment() > StackAlign) ||
-                              F->hasFnAttribute(Attribute::StackAlignment));
-
-  return requiresRealignment && canRealignStack(MF);
-}
-
 /// Returns true if the instruction's frame index
 /// reference would be better served by a base register other than FP
 /// or SP. Used by LocalStackFrameAllocation to determine which frame index
@@ -946,11 +928,8 @@ needsFrameBaseReg(MachineInstr *MI, int64_t Offset) const {
 
   MachineBasicBlock &MBB = *MI->getParent();
   MachineFunction &MF = *MBB.getParent();
-  const PPCSubtarget &Subtarget = MF.getSubtarget<PPCSubtarget>();
-  const PPCFrameLowering *PPCFI =
-      static_cast<const PPCFrameLowering *>(Subtarget.getFrameLowering());
-  unsigned StackEst =
-    PPCFI->determineFrameLayout(MF, false, true);
+  const PPCFrameLowering *TFI = getFrameLowering(MF);
+  unsigned StackEst = TFI->determineFrameLayout(MF, false, true);
 
   // If we likely don't need a stack frame, then we probably don't need a
   // virtual base register either.
@@ -1034,4 +1013,3 @@ bool PPCRegisterInfo::isFrameOffsetLegal(const MachineInstr *MI,
          MI->getOpcode() == TargetOpcode::PATCHPOINT ||
          (isInt<16>(Offset) && (!usesIXAddr(*MI) || (Offset & 3) == 0));
 }
-