[mips] Add support for parsing target specific flags for MIR

[atanasyan]

LGTM

llvm/trunk/lib/Target/Mips/MipsInstrInfo.h

public:
 
   bool findCommutedOpIndices(MachineInstr &MI, unsigned &SrcOpIdx1,
                              unsigned &SrcOpIdx2) const override;
 
   /// Perform target specific instruction verification.
   bool verifyInstruction(const MachineInstr &MI,
                          StringRef &ErrInfo) const override;
 
+  std::pair<unsigned, unsigned>
+  decomposeMachineOperandsTargetFlags(unsigned TF) const override;
+
+  ArrayRef<std::pair<unsigned, const char *>>
+  getSerializableDirectMachineOperandTargetFlags() const override;
+
 protected:
   bool isZeroImm(const MachineOperand &op) const;
 
   MachineMemOperand *GetMemOperand(MachineBasicBlock &MBB, int FI,
                                    MachineMemOperand::Flags Flags) const;
 
 private:
   virtual unsigned getAnalyzableBrOpc(unsigned Opc) const = 0;

llvm/trunk/lib/Target/Mips/MipsInstrInfo.cpp

case Mips::DEXTU_MM64R6:
       return verifyInsExtInstruction(MI, ErrInfo, 32, 64, 0, 32, 32, 64);
     default:
       return true;
   }
 
   return true;
 }
 
+std::pair<unsigned, unsigned>
+MipsInstrInfo::decomposeMachineOperandsTargetFlags(unsigned TF) const {
+  return std::make_pair(TF, 0u);
+}
+
+ArrayRef<std::pair<unsigned, const char*>>
+MipsInstrInfo::getSerializableDirectMachineOperandTargetFlags() const {
+ using namespace MipsII;
+
+ static const std::pair<unsigned, const char*> Flags[] = {
+    {MO_GOT,          "mips-got"},
+    {MO_GOT_CALL,     "mips-got-call"},
+    {MO_GPREL,        "mips-gprel"},
+    {MO_ABS_HI,       "mips-abs-hi"},
+    {MO_ABS_LO,       "mips-abs-lo"},
+    {MO_TLSGD,        "mips-tlsgd"},
+    {MO_TLSLDM,       "mips-tlsldm"},
+    {MO_DTPREL_HI,    "mips-dtprel-hi"},
+    {MO_DTPREL_LO,    "mips-dtprel-lo"},
+    {MO_GOTTPREL,     "mips-gottprel"},
+    {MO_TPREL_HI,     "mips-tprel-hi"},
+    {MO_TPREL_LO,     "mips-tprel-lo"},
+    {MO_GPOFF_HI,     "mips-gpoff-hi"},
+    {MO_GPOFF_LO,     "mips-gpoff-lo"},
+    {MO_GOT_DISP,     "mips-got-disp"},
+    {MO_GOT_PAGE,     "mips-got-page"},
+    {MO_GOT_OFST,     "mips-got-ofst"},
+    {MO_HIGHER,       "mips-higher"},
+    {MO_HIGHEST,      "mips-highest"},
+    {MO_GOT_HI16,     "mips-got-hi16"},
+    {MO_GOT_LO16,     "mips-got-lo16"},
+    {MO_CALL_HI16,    "mips-call-hi16"},
+    {MO_CALL_LO16,    "mips-call-lo16"}
+  };
+  return makeArrayRef(Flags);
+}