[llvm] [AMDGPU] Avoid repeated hash lookups (NFC) (PR #111787)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/111787

None

>From 3da00cf677663b64b903614e547908e2e14efb1d Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Wed, 9 Oct 2024 20:23:59 -0700
Subject: [PATCH] [AMDGPU] Avoid repeated hash lookups (NFC)

---
 llvm/lib/Target/AMDGPU/R600ISelLowering.cpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/llvm/lib/Target/AMDGPU/R600ISelLowering.cpp b/llvm/lib/Target/AMDGPU/R600ISelLowering.cpp
index 7e4d9d21a0b397..1b88fdd3ab2e1c 100644
--- a/llvm/lib/Target/AMDGPU/R600ISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/R600ISelLowering.cpp
@@ -1647,16 +1647,18 @@ SDValue R600TargetLowering::OptimizeSwizzle(SDValue BuildVector, SDValue Swz[],
   BuildVector = CompactSwizzlableVector(DAG, BuildVector, SwizzleRemap);
   for (unsigned i = 0; i < 4; i++) {
     unsigned Idx = Swz[i]->getAsZExtVal();
-    if (SwizzleRemap.contains(Idx))
-      Swz[i] = DAG.getConstant(SwizzleRemap[Idx], DL, MVT::i32);
+    auto It = SwizzleRemap.find(Idx);
+    if (It != SwizzleRemap.end())
+      Swz[i] = DAG.getConstant(It->second, DL, MVT::i32);
   }
 
   SwizzleRemap.clear();
   BuildVector = ReorganizeVector(DAG, BuildVector, SwizzleRemap);
   for (unsigned i = 0; i < 4; i++) {
     unsigned Idx = Swz[i]->getAsZExtVal();
-    if (SwizzleRemap.contains(Idx))
-      Swz[i] = DAG.getConstant(SwizzleRemap[Idx], DL, MVT::i32);
+    auto It = SwizzleRemap.find(Idx);
+    if (It != SwizzleRemap.end())
+      Swz[i] = DAG.getConstant(It->second, DL, MVT::i32);
   }
 
   return BuildVector;