[llvm] [AMDGPU] Avoid repeated hash lookups (NFC) (PR #131958)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-amdgpu

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/131958.diff


1 Files Affected:

- (modified) llvm/lib/Target/AMDGPU/AMDGPUSetWavePriority.cpp (+6-6) 


``````````diff
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUSetWavePriority.cpp b/llvm/lib/Target/AMDGPU/AMDGPUSetWavePriority.cpp
index c16d33f1453c0..d760cd3115eaa 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUSetWavePriority.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUSetWavePriority.cpp
@@ -200,12 +200,12 @@ bool AMDGPUSetWavePriority::runOnMachineFunction(MachineFunction &MF) {
   }
 
   for (MachineBasicBlock *MBB : PriorityLoweringBlocks) {
-    BuildSetprioMI(
-        *MBB,
-        MBBInfos[MBB].LastVMEMLoad
-            ? std::next(MachineBasicBlock::iterator(MBBInfos[MBB].LastVMEMLoad))
-            : MBB->begin(),
-        LowPriority);
+    MachineInstr *LastVMEMLoad = MBBInfos[MBB].LastVMEMLoad;
+    BuildSetprioMI(*MBB,
+                   LastVMEMLoad
+                       ? std::next(MachineBasicBlock::iterator(LastVMEMLoad))
+                       : MBB->begin(),
+                   LowPriority);
   }
 
   return true;

``````````

</details>


https://github.com/llvm/llvm-project/pull/131958