diff options
Diffstat (limited to 'lib/Target/PowerPC/PPCRegisterInfo.cpp')
-rw-r--r-- | lib/Target/PowerPC/PPCRegisterInfo.cpp | 18 |
1 files changed, 2 insertions, 16 deletions
diff --git a/lib/Target/PowerPC/PPCRegisterInfo.cpp b/lib/Target/PowerPC/PPCRegisterInfo.cpp index fd79de1..3e5ee75 100644 --- a/lib/Target/PowerPC/PPCRegisterInfo.cpp +++ b/lib/Target/PowerPC/PPCRegisterInfo.cpp @@ -121,12 +121,6 @@ BitVector PPCRegisterInfo::getReservedRegs(const MachineFunction &MF) const { Reserved.set(PPC::R2); // System-reserved register Reserved.set(PPC::R13); // Small Data Area pointer register } - // Reserve R2 on Darwin to hack around the problem of save/restore of CR - // when the stack frame is too big to address directly; we need two regs. - // This is a hack. - if (Subtarget.isDarwinABI()) { - Reserved.set(PPC::R2); - } // On PPC64, r13 is the thread pointer. Never allocate this register. // Note that this is over conservative, as it also prevents allocation of R31 @@ -144,12 +138,6 @@ BitVector PPCRegisterInfo::getReservedRegs(const MachineFunction &MF) const { if (Subtarget.isSVR4ABI()) { Reserved.set(PPC::X2); } - // Reserve X2 on Darwin to hack around the problem of save/restore of CR - // when the stack frame is too big to address directly; we need two regs. - // This is a hack. - if (Subtarget.isDarwinABI()) { - Reserved.set(PPC::X2); - } } if (PPCFI->needsFP(MF)) @@ -334,8 +322,7 @@ void PPCRegisterInfo::lowerCRSpilling(MachineBasicBlock::iterator II, (void) RS; bool LP64 = Subtarget.isPPC64(); - unsigned Reg = Subtarget.isDarwinABI() ? (LP64 ? PPC::X2 : PPC::R2) : - (LP64 ? PPC::X0 : PPC::R0); + unsigned Reg = LP64 ? PPC::X0 : PPC::R0; unsigned SrcReg = MI.getOperand(0).getReg(); // We need to store the CR in the low 4-bits of the saved value. First, issue @@ -377,8 +364,7 @@ void PPCRegisterInfo::lowerCRRestore(MachineBasicBlock::iterator II, (void) RS; bool LP64 = Subtarget.isPPC64(); - unsigned Reg = Subtarget.isDarwinABI() ? (LP64 ? PPC::X2 : PPC::R2) : - (LP64 ? PPC::X0 : PPC::R0); + unsigned Reg = LP64 ? PPC::X0 : PPC::R0; unsigned DestReg = MI.getOperand(0).getReg(); assert(MI.definesRegister(DestReg) && "RESTORE_CR does not define its destination"); |