[llvm] [AMDGPU] Avoid repeated hash lookups (NFC) (PR #113409)

[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/113409.diff


1 Files Affected:

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


``````````diff
diff --git a/llvm/lib/Target/AMDGPU/AMDGPULateCodeGenPrepare.cpp b/llvm/lib/Target/AMDGPU/AMDGPULateCodeGenPrepare.cpp
index 77350dbb6167cb..c80d60c3a52112 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPULateCodeGenPrepare.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPULateCodeGenPrepare.cpp
@@ -329,8 +329,8 @@ bool LiveRegOptimizer::optimizeLiveType(
         Type *NewType = calculateConvertType(Phi->getType());
         NewPhi->addIncoming(ConstantInt::get(NewType, 0, false),
                             Phi->getIncomingBlock(I));
-      } else if (ValMap.contains(IncVal) && ValMap[IncVal])
-        NewPhi->addIncoming(ValMap[IncVal], Phi->getIncomingBlock(I));
+      } else if (Value *Val = ValMap.lookup(IncVal))
+        NewPhi->addIncoming(Val, Phi->getIncomingBlock(I));
       else
         MissingIncVal = true;
     }

``````````

</details>


https://github.com/llvm/llvm-project/pull/113409