[llvm] [RISCV][NFC] Simplify Imm range checks (PR #170497)

[Alexander Richardson via llvm-commits]

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@@ -2904,7 +2904,7 @@ bool RISCVInstrInfo::verifyInstruction(const MachineInstr &MI,
           Ok = isUInt<5>(Imm) && (Imm > 3);
           break;
         case RISCVOp::OPERAND_UIMM5_PLUS1:
-          Ok = (isUInt<5>(Imm) && (Imm != 0)) || (Imm == 32);
+          Ok = Imm >= 1 && Imm <= 32;
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arichardson wrote:

Ah yes I guess you could cast to unsigned but that negates the clarity benefit. 

https://github.com/llvm/llvm-project/pull/170497