[RISCV] Fix the check assertion in hasMergeOp and hasMaskOp

[jacquesguan]

Summary

Because we have STRICT_FCVT_W_RV64 equal to ISD::FIRST_TARGET_STRICTFP_OPCODE, the check needs to be splitted into 2 parts.

[jacquesguan]

Add some enumeration to mark the begin and end of vl op.

[craig.topper]

llvm/lib/Target/RISCV/RISCVISelLowering.h

171 ↗

(On Diff #543803)

READ_VLENB is not a VL vector op

[jacquesguan]

move READ_VLENB out of vl range.

[jacquesguan]

llvm/lib/Target/RISCV/RISCVISelLowering.h

171 ↗

(On Diff #543803)

Done.

[craig.topper]

LGTM

llvm/lib/Target/RISCV/RISCVISelLowering.cpp

#undef OP_CASE
   }
 }
 
 /// Return true if a RISC-V target specified op has a merge operand.
 static bool hasMergeOp(unsigned Opcode) {
   assert(Opcode > RISCVISD::FIRST_NUMBER &&
          Opcode <= RISCVISD::STRICT_VFROUND_NOEXCEPT_VL &&
          "not a RISC-V target specific op");
-  assert(RISCVISD::STRICT_VFROUND_NOEXCEPT_VL - RISCVISD::FIRST_NUMBER == 421 &&
+  assert(RISCVISD::VFIRST_VL - RISCVISD::FIRST_NUMBER == 177 &&
+         RISCVISD::STRICT_VFROUND_NOEXCEPT_VL -
+                 ISD::FIRST_TARGET_STRICTFP_OPCODE ==
+             21 &&
          "adding target specific op should update this function");
   if (Opcode >= RISCVISD::ADD_VL && Opcode <= RISCVISD::FMAXNUM_VL)
     return true;
   if (Opcode == RISCVISD::FCOPYSIGN_VL)
     return true;
   if (Opcode >= RISCVISD::VWMUL_VL && Opcode <= RISCVISD::VFWSUB_W_VL)
     return true;
   if (Opcode >= RISCVISD::STRICT_FADD_VL && Opcode <= RISCVISD::STRICT_FDIV_VL)
     return true;
   return false;
 }
 
 /// Return true if a RISC-V target specified op has a mask operand.
 static bool hasMaskOp(unsigned Opcode) {
   assert(Opcode > RISCVISD::FIRST_NUMBER &&
          Opcode <= RISCVISD::STRICT_VFROUND_NOEXCEPT_VL &&
          "not a RISC-V target specific op");
-  assert(RISCVISD::STRICT_VFROUND_NOEXCEPT_VL - RISCVISD::FIRST_NUMBER == 421 &&
+  assert(RISCVISD::VFIRST_VL - RISCVISD::FIRST_NUMBER == 177 &&
+         RISCVISD::STRICT_VFROUND_NOEXCEPT_VL -
+                 ISD::FIRST_TARGET_STRICTFP_OPCODE ==
+             21 &&
          "adding target specific op should update this function");
   if (Opcode >= RISCVISD::TRUNCATE_VECTOR_VL && Opcode <= RISCVISD::SETCC_VL)
     return true;
   if (Opcode >= RISCVISD::VRGATHER_VX_VL && Opcode <= RISCVISD::VFIRST_VL)
     return true;
   if (Opcode >= RISCVISD::STRICT_FADD_VL &&
       Opcode <= RISCVISD::STRICT_VFROUND_NOEXCEPT_VL)
     return true;