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

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-tablegen

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/126344.diff


1 Files Affected:

- (modified) llvm/utils/TableGen/X86InstrMappingEmitter.cpp (+3-2) 


``````````diff
diff --git a/llvm/utils/TableGen/X86InstrMappingEmitter.cpp b/llvm/utils/TableGen/X86InstrMappingEmitter.cpp
index 1ee79aa27fa98c..df43f39e0e9bee 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;
     }
 

``````````

</details>


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