[llvm] [AMDGPU] Avoid repeated hash lookups (NFC) (PR #127573)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata updated https://github.com/llvm/llvm-project/pull/127573

>From 6c895205149713fed76e45061057816345e49cc0 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Mon, 17 Feb 2025 02:07:49 -0800
Subject: [PATCH 1/2] [AMDGPU] Avoid repeated hash lookups (NFC)

---
 llvm/lib/Target/AMDGPU/AMDGPUWaitSGPRHazards.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUWaitSGPRHazards.cpp b/llvm/lib/Target/AMDGPU/AMDGPUWaitSGPRHazards.cpp
index e70d6aab306fe..9e2261b663dc9 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUWaitSGPRHazards.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUWaitSGPRHazards.cpp
@@ -384,13 +384,14 @@ class AMDGPUWaitSGPRHazards {
       }
     }
 
-    bool Changed = State != BlockState[&MBB].Out;
+    auto &BS = BlockState[&MBB];
+    bool Changed = State != BS.Out;
     if (Emit) {
       assert(!Changed && "Hazard state should not change on emit pass");
       return Emitted;
     }
     if (Changed)
-      BlockState[&MBB].Out = State;
+      BS.Out = State;
     return Changed;
   }
 

>From 5193edaf664d8bc58782b14aab77ba2103b581cb Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Tue, 18 Feb 2025 01:20:36 -0800
Subject: [PATCH 2/2] Address a comment.

---
 llvm/lib/Target/AMDGPU/AMDGPUWaitSGPRHazards.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUWaitSGPRHazards.cpp b/llvm/lib/Target/AMDGPU/AMDGPUWaitSGPRHazards.cpp
index 9e2261b663dc9..4df55eac5d76b 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUWaitSGPRHazards.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUWaitSGPRHazards.cpp
@@ -384,7 +384,7 @@ class AMDGPUWaitSGPRHazards {
       }
     }
 
-    auto &BS = BlockState[&MBB];
+    BlockHazardState &BS = BlockState[&MBB];
     bool Changed = State != BS.Out;
     if (Emit) {
       assert(!Changed && "Hazard state should not change on emit pass");