diff options
Diffstat (limited to 'llvm/lib/Target/PowerPC/PPCInstrInfo.h')
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCInstrInfo.h | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.h b/llvm/lib/Target/PowerPC/PPCInstrInfo.h index f0d12a025e3..da4585f2df4 100644 --- a/llvm/lib/Target/PowerPC/PPCInstrInfo.h +++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.h @@ -79,6 +79,23 @@ class PPCInstrInfo : public PPCGenInstrInfo { SmallVectorImpl<MachineInstr*> &NewMIs, bool &NonRI, bool &SpillsVRS) const; virtual void anchor(); + +protected: + /// Commutes the operands in the given instruction. + /// The commutable operands are specified by their indices OpIdx1 and OpIdx2. + /// + /// Do not call this method for a non-commutable instruction or for + /// non-commutable pair of operand indices OpIdx1 and OpIdx2. + /// Even though the instruction is commutable, the method may still + /// fail to commute the operands, null pointer is returned in such cases. + /// + /// For example, we can commute rlwimi instructions, but only if the + /// rotate amt is zero. We also have to munge the immediates a bit. + MachineInstr *commuteInstructionImpl(MachineInstr *MI, + bool NewMI, + unsigned OpIdx1, + unsigned OpIdx2) const override; + public: explicit PPCInstrInfo(PPCSubtarget &STI); @@ -140,10 +157,6 @@ public: unsigned isStoreToStackSlot(const MachineInstr *MI, int &FrameIndex) const override; - // commuteInstruction - We can commute rlwimi instructions, but only if the - // rotate amt is zero. We also have to munge the immediates a bit. - MachineInstr *commuteInstruction(MachineInstr *MI, bool NewMI) const override; - bool findCommutedOpIndices(MachineInstr *MI, unsigned &SrcOpIdx1, unsigned &SrcOpIdx2) const override; |
