[llvm] [SPIRV] Avoid repeated map lookups. NFC (PR #125036)

[Craig Topper via llvm-commits]

https://github.com/topperc created https://github.com/llvm/llvm-project/pull/125036

None

>From 4bb5dd0e0dd718499d8ab88537f47b84604c64a2 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper at sifive.com>
Date: Wed, 29 Jan 2025 22:47:08 -0800
Subject: [PATCH] [SPIRV] Avoid repeated map lookups. NFC

---
 llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.h | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.h b/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.h
index 79b5444cca205d..e6b8a381b71800 100644
--- a/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.h
+++ b/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.h
@@ -180,11 +180,13 @@ struct ModuleAnalysisInfo {
     if (RI == RegisterAliasTable[MF].end()) {
       return Register(0);
     }
-    return RegisterAliasTable[MF][Reg];
+    return RI->second;
   }
   bool hasRegisterAlias(const MachineFunction *MF, Register Reg) {
-    return RegisterAliasTable.find(MF) != RegisterAliasTable.end() &&
-           RegisterAliasTable[MF].find(Reg) != RegisterAliasTable[MF].end();
+    auto RI = RegisterAliasTable.find(MF);
+    if (RI == RegisterAliasTable.end())
+      return false;
+    return RI->second.find(Reg) != RI->second.end();
   }
   unsigned getNextID() { return MaxID++; }
   bool hasMBBRegister(const MachineBasicBlock &MBB) {