[llvm] [TableGen] Avoid repeated hash lookups (NFC) (PR #126405)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/126405

None

>From 2fbbc8fbef20500d183b77e9d077fae352bccae1 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sat, 8 Feb 2025 11:41:15 -0800
Subject: [PATCH] [TableGen] Avoid repeated hash lookups (NFC)

---
 llvm/utils/TableGen/PseudoLoweringEmitter.cpp | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/llvm/utils/TableGen/PseudoLoweringEmitter.cpp b/llvm/utils/TableGen/PseudoLoweringEmitter.cpp
index bcbc6ea20751fe7..6d39d1496c09e82 100644
--- a/llvm/utils/TableGen/PseudoLoweringEmitter.cpp
+++ b/llvm/utils/TableGen/PseudoLoweringEmitter.cpp
@@ -79,8 +79,9 @@ unsigned PseudoLoweringEmitter::addDagOperandMapping(
       // "zero_reg" definition.
       if (DI->getDef()->isSubClassOf("Register") ||
           DI->getDef()->getName() == "zero_reg") {
-        OperandMap[BaseIdx + i].Kind = OpData::Reg;
-        OperandMap[BaseIdx + i].Data.Reg = DI->getDef();
+        auto &Entry = OperandMap[BaseIdx + i];
+        Entry.Kind = OpData::Reg;
+        Entry.Data.Reg = DI->getDef();
         ++OpsAdded;
         continue;
       }
@@ -105,12 +106,14 @@ unsigned PseudoLoweringEmitter::addDagOperandMapping(
         OperandMap[BaseIdx + i + I].Kind = OpData::Operand;
       OpsAdded += Insn.Operands[i].MINumOperands;
     } else if (const IntInit *II = dyn_cast<IntInit>(Dag->getArg(i))) {
-      OperandMap[BaseIdx + i].Kind = OpData::Imm;
-      OperandMap[BaseIdx + i].Data.Imm = II->getValue();
+      auto &Entry = OperandMap[BaseIdx + i];
+      Entry.Kind = OpData::Imm;
+      Entry.Data.Imm = II->getValue();
       ++OpsAdded;
     } else if (const auto *BI = dyn_cast<BitsInit>(Dag->getArg(i))) {
-      OperandMap[BaseIdx + i].Kind = OpData::Imm;
-      OperandMap[BaseIdx + i].Data.Imm = *BI->convertInitializerToInt();
+      auto &Entry = OperandMap[BaseIdx + i];
+      Entry.Kind = OpData::Imm;
+      Entry.Data.Imm = *BI->convertInitializerToInt();
       ++OpsAdded;
     } else if (const DagInit *SubDag = dyn_cast<DagInit>(Dag->getArg(i))) {
       // Just add the operands recursively. This is almost certainly