[llvm] [TableGen] Avoid repeated hash lookups (NFC) (PR #126344)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/126344

None

>From 159d6543afa5868c286e347451f4f382dfc1ae98 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Fri, 7 Feb 2025 08:13:42 -0800
Subject: [PATCH] [TableGen] Avoid repeated hash lookups (NFC)

---
 llvm/utils/TableGen/X86InstrMappingEmitter.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/llvm/utils/TableGen/X86InstrMappingEmitter.cpp b/llvm/utils/TableGen/X86InstrMappingEmitter.cpp
index 1ee79aa27fa98cf..df43f39e0e9bee0 100644
--- a/llvm/utils/TableGen/X86InstrMappingEmitter.cpp
+++ b/llvm/utils/TableGen/X86InstrMappingEmitter.cpp
@@ -228,8 +228,9 @@ void X86InstrMappingEmitter::emitCompressEVEXTable(
       // For each pre-compression instruction look for a match in the
       // appropriate vector (instructions with the same opcode) using function
       // object IsMatch.
-      auto Match = llvm::find_if(CompressedInsts[Opcode], IsMatch(Inst));
-      if (Match != CompressedInsts[Opcode].end())
+      const auto &Insts = CompressedInsts[Opcode];
+      auto Match = llvm::find_if(Insts, IsMatch(Inst));
+      if (Match != Insts.end())
         NewInst = *Match;
     }