[llvm] [TableGen] Avoid repeated hash lookups (NFC) (PR #126190)

[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/126190.diff


1 Files Affected:

- (modified) llvm/utils/TableGen/AsmWriterEmitter.cpp (+1-2) 


``````````diff
diff --git a/llvm/utils/TableGen/AsmWriterEmitter.cpp b/llvm/utils/TableGen/AsmWriterEmitter.cpp
index e7606b9df4626b1..795185c677e3020 100644
--- a/llvm/utils/TableGen/AsmWriterEmitter.cpp
+++ b/llvm/utils/TableGen/AsmWriterEmitter.cpp
@@ -967,12 +967,11 @@ void AsmWriterEmitter::EmitPrintAliasInstruction(raw_ostream &O) {
             IAP.addOperand(ROName, MIOpNum, PrintMethodIdx);
 
             // There might be an additional predicate on the MCOperand
-            unsigned Entry = MCOpPredicateMap[Rec];
+            unsigned &Entry = MCOpPredicateMap[Rec];
             if (!Entry) {
               if (!Rec->isValueUnset("MCOperandPredicate")) {
                 MCOpPredicates.push_back(Rec);
                 Entry = MCOpPredicates.size();
-                MCOpPredicateMap[Rec] = Entry;
               } else
                 break; // No conditions on this operand at all
             }

``````````

</details>


https://github.com/llvm/llvm-project/pull/126190