diff options
| -rw-r--r-- | lib/Target/PowerPC/PPCRegisterInfo.cpp | 20 | ||||
| -rw-r--r-- | lib/Target/PowerPC/PPCRegisterInfo.h | 3 |
2 files changed, 23 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/PPCRegisterInfo.cpp b/lib/Target/PowerPC/PPCRegisterInfo.cpp index dec49bd16a..634681cdb4 100644 --- a/lib/Target/PowerPC/PPCRegisterInfo.cpp +++ b/lib/Target/PowerPC/PPCRegisterInfo.cpp @@ -613,6 +613,26 @@ MachineInstr *PPCRegisterInfo::foldMemoryOperand(MachineInstr *MI, return NewMI; } +bool PPCRegisterInfo::canFoldMemoryOperand(MachineInstr *MI, + SmallVectorImpl<unsigned> &Ops) const { + if (Ops.size() != 1) return NULL; + + // Make sure this is a reg-reg copy. Note that we can't handle MCRF, because + // it takes more than one instruction to store it. + unsigned Opc = MI->getOpcode(); + + if ((Opc == PPC::OR && + MI->getOperand(1).getReg() == MI->getOperand(2).getReg())) + return true; + else if ((Opc == PPC::OR8 && + MI->getOperand(1).getReg() == MI->getOperand(2).getReg())) + return true; + else if (Opc == PPC::FMRD || Opc == PPC::FMRS) + return true; + + return false; +} + //===----------------------------------------------------------------------===// // Stack Frame Processing methods //===----------------------------------------------------------------------===// diff --git a/lib/Target/PowerPC/PPCRegisterInfo.h b/lib/Target/PowerPC/PPCRegisterInfo.h index 687af56971..2106c6e667 100644 --- a/lib/Target/PowerPC/PPCRegisterInfo.h +++ b/lib/Target/PowerPC/PPCRegisterInfo.h @@ -75,6 +75,9 @@ public: return 0; } + virtual bool canFoldMemoryOperand(MachineInstr *MI, + SmallVectorImpl<unsigned> &Ops) const; + const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const; const TargetRegisterClass* const* |