[llvm] [AMDGPU] Avoid repeated hash lookups (NFC) (PR #126401)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/126401

This patch just cleans up the "if" condition.  Further cleanups are
left to subsequent patches.


>From b099b32540ffd468cc23eb07c316007117fd8d94 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sat, 8 Feb 2025 11:46:02 -0800
Subject: [PATCH] [AMDGPU] Avoid repeated hash lookups (NFC)

This patch just cleans up the "if" condition.  Further cleanups are
left to subsequent patches.
---
 llvm/lib/Target/AMDGPU/AMDGPULateCodeGenPrepare.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/llvm/lib/Target/AMDGPU/AMDGPULateCodeGenPrepare.cpp b/llvm/lib/Target/AMDGPU/AMDGPULateCodeGenPrepare.cpp
index f4e651ec477d30a..b8109db821bcc38 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPULateCodeGenPrepare.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPULateCodeGenPrepare.cpp
@@ -367,11 +367,11 @@ bool LiveRegOptimizer::optimizeLiveType(
   for (Instruction *U : Uses) {
     // Replace all converted operands for a use.
     for (auto [OpIdx, Op] : enumerate(U->operands())) {
-      if (ValMap.contains(Op) && ValMap[Op]) {
+      if (Value *Val = ValMap.lookup(Op)) {
         Value *NewVal = nullptr;
         if (BBUseValMap.contains(U->getParent()) &&
-            BBUseValMap[U->getParent()].contains(ValMap[Op]))
-          NewVal = BBUseValMap[U->getParent()][ValMap[Op]];
+            BBUseValMap[U->getParent()].contains(Val))
+          NewVal = BBUseValMap[U->getParent()][Val];
         else {
           BasicBlock::iterator InsertPt = U->getParent()->getFirstNonPHIIt();
           // We may pick up ops that were previously converted for users in