[llvm] [TableGen] Avoid repeated hash lookups (NFC) (PR #125635)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/125635

None

>From cdc4eae60bfae0a89302d0adbe99219079bcdd73 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Mon, 3 Feb 2025 16:42:48 -0800
Subject: [PATCH] [TableGen] Avoid repeated hash lookups (NFC)

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

diff --git a/llvm/utils/TableGen/Common/CodeGenTarget.cpp b/llvm/utils/TableGen/Common/CodeGenTarget.cpp
index fb9bb15feab3cf..e8286d295587fc 100644
--- a/llvm/utils/TableGen/Common/CodeGenTarget.cpp
+++ b/llvm/utils/TableGen/Common/CodeGenTarget.cpp
@@ -262,8 +262,9 @@ void CodeGenTarget::ReadInstructions() const {
 
   // Parse the instructions defined in the .td file.
   for (const Record *R : Insts) {
-    Instructions[R] = std::make_unique<CodeGenInstruction>(R);
-    if (Instructions[R]->isVariableLengthEncoding())
+    auto &Inst = Instructions[R];
+    Inst = std::make_unique<CodeGenInstruction>(R);
+    if (Inst->isVariableLengthEncoding())
       HasVariableLengthEncodings = true;
   }
 }