[RISCV][NFC] Refine MCOperandPredicate code for rtlist.

[yetingk]

(Imm <= 15) could be implied by isUInt<4>(Imm).

[llvmbot]

@llvm/pr-subscribers-backend-risc-v

Author: Yeting Kuo (yetingk)

Changes

(Imm <= 15) could be implied by isUInt<4>(Imm).

---

Full diff: https://github.com/llvm/llvm-project/pull/76028.diff

1 Files Affected:

• (modified) llvm/lib/Target/RISCV/RISCVInstrInfoZc.td (+1-2)

diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfoZc.td b/llvm/lib/Target/RISCV/RISCVInstrInfoZc.td
index a78f3624446871..9a7249fe3e3d6c 100644
--- a/llvm/lib/Target/RISCV/RISCVInstrInfoZc.td
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfoZc.td
@@ -56,9 +56,8 @@ def rlist : Operand<OtherVT> {
     int64_t Imm;
     if (!MCOp.evaluateAsConstantImm(Imm))
       return false;
-    if (!isUInt<4>(Imm)) return false;
     // 0~3 Reserved for EABI
-    return (Imm >= 4) && (Imm <= 15);
+    return isUInt<4>(Imm) && Imm >= 4;
   }];
  }
 

[yetingk]

Ping.

[tclin914]

LGTM