[RISCV] Replace uses of RISCVOpcode<0b0010011> and RISCVOpcode<0b0011011> with existing named objects. NFC

[craig.topper]

Summary

These are already instantiated with names as OPC_OP_IMM and
OPC_OP_IMM_32.

[frasercrmck]

LGTM

llvm/lib/Target/RISCV/RISCVInstrInfoZb.td

def FSL  : RVBTernaryR<0b10, 0b001, OPC_OP, "fsl", "$rd, $rs1, $rs3, $rs2">,
            Sched<[]>;
 def FSR  : RVBTernaryR<0b10, 0b101, OPC_OP, "fsr", "$rd, $rs1, $rs3, $rs2">,
            Sched<[]>;
 def FSRI : RVBTernaryImm6<0b101, OPC_OP_IMM, "fsri",
                           "$rd, $rs1, $rs3, $shamt">, Sched<[]>;
 } // Predicates = [HasStdExtZbt]
 
 let Predicates = [HasStdExtZbb] in {
-def CLZ  : RVBUnary<0b0110000, 0b00000, 0b001, RISCVOpcode<0b0010011>, "clz">,
+def CLZ  : RVBUnary<0b0110000, 0b00000, 0b001, OPC_OP_IMM, "clz">,
            Sched<[WriteCLZ, ReadCLZ]>;
-def CTZ  : RVBUnary<0b0110000, 0b00001, 0b001, RISCVOpcode<0b0010011>, "ctz">,
+def CTZ  : RVBUnary<0b0110000, 0b00001, 0b001, OPC_OP_IMM, "ctz">,
            Sched<[WriteCTZ, ReadCTZ]>;
-def CPOP : RVBUnary<0b0110000, 0b00010, 0b001, RISCVOpcode<0b0010011>, "cpop">,
+def CPOP : RVBUnary<0b0110000, 0b00010, 0b001, OPC_OP_IMM, "cpop">,
            Sched<[WriteCPOP, ReadCPOP]>;
 } // Predicates = [HasStdExtZbb]
 
 let Predicates = [HasStdExtZbm, IsRV64] in
-def BMATFLIP : RVBUnary<0b0110000, 0b00011, 0b001, RISCVOpcode<0b0010011>,
-                        "bmatflip">, Sched<[]>;
+def BMATFLIP : RVBUnary<0b0110000, 0b00011, 0b001, OPC_OP_IMM, "bmatflip">,
+               Sched<[]>;
 
 let Predicates = [HasStdExtZbb] in {
-def SEXTB : RVBUnary<0b0110000, 0b00100, 0b001, RISCVOpcode<0b0010011>,
-                     "sext.b">, Sched<[WriteIALU, ReadIALU]>;
-def SEXTH : RVBUnary<0b0110000, 0b00101, 0b001, RISCVOpcode<0b0010011>,
-                     "sext.h">, Sched<[WriteIALU, ReadIALU]>;
+def SEXTB : RVBUnary<0b0110000, 0b00100, 0b001, OPC_OP_IMM, "sext.b">,
+            Sched<[WriteIALU, ReadIALU]>;
+def SEXTH : RVBUnary<0b0110000, 0b00101, 0b001, OPC_OP_IMM, "sext.h">,
+            Sched<[WriteIALU, ReadIALU]>;
 } // Predicates = [HasStdExtZbb]
 
 let Predicates = [HasStdExtZbr] in {
-def CRC32B : RVBUnary<0b0110000, 0b10000, 0b001, RISCVOpcode<0b0010011>,
-                      "crc32.b">, Sched<[]>;
-def CRC32H : RVBUnary<0b0110000, 0b10001, 0b001, RISCVOpcode<0b0010011>,
-                      "crc32.h">, Sched<[]>;
-def CRC32W : RVBUnary<0b0110000, 0b10010, 0b001, RISCVOpcode<0b0010011>,
-                      "crc32.w">, Sched<[]>;
+def CRC32B : RVBUnary<0b0110000, 0b10000, 0b001, OPC_OP_IMM, "crc32.b">,
+             Sched<[]>;
+def CRC32H : RVBUnary<0b0110000, 0b10001, 0b001, OPC_OP_IMM, "crc32.h">,
+             Sched<[]>;
+def CRC32W : RVBUnary<0b0110000, 0b10010, 0b001, OPC_OP_IMM, "crc32.w">,
+             Sched<[]>;
 } // Predicates = [HasStdExtZbr]
 
 let Predicates = [HasStdExtZbr, IsRV64] in
-def CRC32D  : RVBUnary<0b0110000, 0b10011, 0b001, RISCVOpcode<0b0010011>,
-                       "crc32.d">, Sched<[]>;
+def CRC32D  : RVBUnary<0b0110000, 0b10011, 0b001, OPC_OP_IMM, "crc32.d">,
+              Sched<[]>;
 
 let Predicates = [HasStdExtZbr] in {
-def CRC32CB : RVBUnary<0b0110000, 0b11000, 0b001, RISCVOpcode<0b0010011>,
-                       "crc32c.b">, Sched<[]>;
-def CRC32CH : RVBUnary<0b0110000, 0b11001, 0b001, RISCVOpcode<0b0010011>,
-                       "crc32c.h">, Sched<[]>;
-def CRC32CW : RVBUnary<0b0110000, 0b11010, 0b001, RISCVOpcode<0b0010011>,
-                       "crc32c.w">, Sched<[]>;
+def CRC32CB : RVBUnary<0b0110000, 0b11000, 0b001, OPC_OP_IMM, "crc32c.b">,
+              Sched<[]>;
+def CRC32CH : RVBUnary<0b0110000, 0b11001, 0b001, OPC_OP_IMM, "crc32c.h">,
+              Sched<[]>;
+def CRC32CW : RVBUnary<0b0110000, 0b11010, 0b001, OPC_OP_IMM, "crc32c.w">,
+              Sched<[]>;
 } // Predicates = [HasStdExtZbr]
 
 let Predicates = [HasStdExtZbr, IsRV64] in
-def CRC32CD : RVBUnary<0b0110000, 0b11011, 0b001, RISCVOpcode<0b0010011>,
-                       "crc32c.d">, Sched<[]>;
+def CRC32CD : RVBUnary<0b0110000, 0b11011, 0b001, OPC_OP_IMM, "crc32c.d">,
+              Sched<[]>;
 
 let Predicates = [HasStdExtZbc] in {
 def CLMUL  : ALU_rr<0b0000101, 0b001, "clmul">, Sched<[]>;
 def CLMULR : ALU_rr<0b0000101, 0b010, "clmulr">, Sched<[]>;
 def CLMULH : ALU_rr<0b0000101, 0b011, "clmulh">, Sched<[]>;
 } // Predicates = [HasStdExtZbc]
 
 let Predicates = [HasStdExtZbb] in {
def FSLW  : RVBTernaryR<0b10, 0b001, OPC_OP_32,
                         "fslw", "$rd, $rs1, $rs3, $rs2">, Sched<[]>;
 def FSRW  : RVBTernaryR<0b10, 0b101, OPC_OP_32, "fsrw",
                         "$rd, $rs1, $rs3, $rs2">, Sched<[]>;
 def FSRIW : RVBTernaryImm5<0b10, 0b101, OPC_OP_IMM_32,
                            "fsriw", "$rd, $rs1, $rs3, $shamt">, Sched<[]>;
 } // Predicates = [HasStdExtZbt, IsRV64]
 
 let Predicates = [HasStdExtZbb, IsRV64] in {
-def CLZW   : RVBUnary<0b0110000, 0b00000, 0b001, RISCVOpcode<0b0011011>,
-                      "clzw">, Sched<[WriteCLZ32, ReadCLZ32]>;
-def CTZW   : RVBUnary<0b0110000, 0b00001, 0b001, RISCVOpcode<0b0011011>,
-                      "ctzw">, Sched<[WriteCTZ32, ReadCTZ32]>;
-def CPOPW  : RVBUnary<0b0110000, 0b00010, 0b001, RISCVOpcode<0b0011011>,
-                      "cpopw">, Sched<[WriteCPOP32, ReadCPOP32]>;
+def CLZW   : RVBUnary<0b0110000, 0b00000, 0b001, OPC_OP_IMM_32, "clzw">,
+             Sched<[WriteCLZ32, ReadCLZ32]>;
+def CTZW   : RVBUnary<0b0110000, 0b00001, 0b001, OPC_OP_IMM_32, "ctzw">,
+             Sched<[WriteCTZ32, ReadCTZ32]>;
+def CPOPW  : RVBUnary<0b0110000, 0b00010, 0b001, OPC_OP_IMM_32, "cpopw">,
+             Sched<[WriteCPOP32, ReadCPOP32]>;
 } // Predicates = [HasStdExtZbb, IsRV64]
 
 let Predicates = [HasStdExtZbp, IsRV64] in {
 def SHFLW   : ALUW_rr<0b0000100, 0b001, "shflw">, Sched<[]>;
 def UNSHFLW : ALUW_rr<0b0000100, 0b101, "unshflw">, Sched<[]>;
 } // Predicates = [HasStdExtZbp, IsRV64]
 
 let Predicates = [HasStdExtZbe, IsRV64] in {