[llvm] [TableGen] Avoid repeated hash lookups (NFC) (PR #127373)

[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/127373.diff


1 Files Affected:

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


``````````diff
diff --git a/llvm/utils/TableGen/AsmMatcherEmitter.cpp b/llvm/utils/TableGen/AsmMatcherEmitter.cpp
index fcc82e598c437..24822c847046d 100644
--- a/llvm/utils/TableGen/AsmMatcherEmitter.cpp
+++ b/llvm/utils/TableGen/AsmMatcherEmitter.cpp
@@ -2333,9 +2333,9 @@ emitConvertFuncs(CodeGenTarget &Target, StringRef ClassName,
     OS << "  // " << InstructionConversionKinds[Row] << "\n";
     OS << "  { ";
     for (unsigned i = 0, e = ConversionTable[Row].size(); i != e; i += 2) {
-      OS << OperandConversionKinds[ConversionTable[Row][i]] << ", ";
-      if (OperandConversionKinds[ConversionTable[Row][i]] !=
-          CachedHashString("CVT_Tied")) {
+      const auto &OCK = OperandConversionKinds[ConversionTable[Row][i]];
+      OS << OCK << ", ";
+      if (OCK != CachedHashString("CVT_Tied")) {
         OS << (unsigned)(ConversionTable[Row][i + 1]) << ", ";
         continue;
       }

``````````

</details>


https://github.com/llvm/llvm-project/pull/127373