[llvm] [AMDGPU] Avoid repeated hash lookups (NFC) (PR #109506)

[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/109506.diff


1 Files Affected:

- (modified) llvm/lib/Target/AMDGPU/AMDGPULateCodeGenPrepare.cpp (+1-2) 


``````````diff
diff --git a/llvm/lib/Target/AMDGPU/AMDGPULateCodeGenPrepare.cpp b/llvm/lib/Target/AMDGPU/AMDGPULateCodeGenPrepare.cpp
index 36dfebacaed686..3767a6b379f81c 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPULateCodeGenPrepare.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPULateCodeGenPrepare.cpp
@@ -296,9 +296,8 @@ bool LiveRegOptimizer::optimizeLiveType(
       // Collect all uses of PHINodes and any use the crosses BB boundaries.
       if (UseInst->getParent() != II->getParent() || isa<PHINode>(II)) {
         Uses.insert(UseInst);
-        if (!Defs.count(II) && !isa<PHINode>(II)) {
+        if (!isa<PHINode>(II))
           Defs.insert(II);
-        }
       }
     }
   }

``````````

</details>


https://github.com/llvm/llvm-project/pull/109506