[llvm] [SPIRV] Avoid repeated hash lookups (NFC) (PR #129358)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-spir-v

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/129358.diff


1 Files Affected:

- (modified) llvm/lib/Target/SPIRV/SPIRVMergeRegionExitTargets.cpp (+2-6) 


``````````diff
diff --git a/llvm/lib/Target/SPIRV/SPIRVMergeRegionExitTargets.cpp b/llvm/lib/Target/SPIRV/SPIRVMergeRegionExitTargets.cpp
index c22492ec43b09..267ab7b6376bd 100644
--- a/llvm/lib/Target/SPIRV/SPIRVMergeRegionExitTargets.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVMergeRegionExitTargets.cpp
@@ -87,12 +87,8 @@ class SPIRVMergeRegionExitTargets : public FunctionPass {
       BasicBlock *RHSTarget =
           BI->isConditional() ? BI->getSuccessor(1) : nullptr;
 
-      Value *LHS = TargetToValue.count(LHSTarget) != 0
-                       ? TargetToValue.at(LHSTarget)
-                       : nullptr;
-      Value *RHS = TargetToValue.count(RHSTarget) != 0
-                       ? TargetToValue.at(RHSTarget)
-                       : nullptr;
+      Value *LHS = TargetToValue.lookup(LHSTarget);
+      Value *RHS = TargetToValue.lookup(RHSTarget);
 
       if (LHS == nullptr || RHS == nullptr)
         return LHS == nullptr ? RHS : LHS;

``````````

</details>


https://github.com/llvm/llvm-project/pull/129358