[llvm] [NFC][DominanceFrontier] Remove unused return value (PR #178708)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-analysis

Author: Andrei Elovikov (eas)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/178708.diff


2 Files Affected:

- (modified) llvm/include/llvm/Analysis/DominanceFrontier.h (+1-1) 
- (modified) llvm/include/llvm/Analysis/DominanceFrontierImpl.h (+2-7) 


``````````diff
diff --git a/llvm/include/llvm/Analysis/DominanceFrontier.h b/llvm/include/llvm/Analysis/DominanceFrontier.h
index 787793501f98a..ec49b36d64cfd 100644
--- a/llvm/include/llvm/Analysis/DominanceFrontier.h
+++ b/llvm/include/llvm/Analysis/DominanceFrontier.h
@@ -116,7 +116,7 @@ class ForwardDominanceFrontierBase
     calculate(DT, DT[this->Roots[0]]);
   }
 
-  const DomSetType &calculate(const DomTreeT &DT, const DomTreeNodeT *Node);
+  void calculate(const DomTreeT &DT, const DomTreeNodeT *Node);
 };
 
 class DominanceFrontier : public ForwardDominanceFrontierBase<BasicBlock> {
diff --git a/llvm/include/llvm/Analysis/DominanceFrontierImpl.h b/llvm/include/llvm/Analysis/DominanceFrontierImpl.h
index 1483588581f4e..c7fc463fd3af5 100644
--- a/llvm/include/llvm/Analysis/DominanceFrontierImpl.h
+++ b/llvm/include/llvm/Analysis/DominanceFrontierImpl.h
@@ -74,11 +74,9 @@ void DominanceFrontierBase<BlockT, IsPostDom>::dump() const {
 #endif
 
 template <class BlockT>
-const typename ForwardDominanceFrontierBase<BlockT>::DomSetType &
-ForwardDominanceFrontierBase<BlockT>::calculate(const DomTreeT &DT,
-                                                const DomTreeNodeT *Node) {
+void ForwardDominanceFrontierBase<BlockT>::calculate(const DomTreeT &DT,
+                                                     const DomTreeNodeT *Node) {
   BlockT *BB = Node->getBlock();
-  DomSetType *Result = nullptr;
 
   std::vector<DFCalculateWorkObject<BlockT>> workList;
   SmallPtrSet<BlockT *, 32> visited;
@@ -126,7 +124,6 @@ ForwardDominanceFrontierBase<BlockT>::calculate(const DomTreeT &DT,
     // from the workList.
     if (!visitChild) {
       if (!parentBB) {
-        Result = &S;
         break;
       }
 
@@ -140,8 +137,6 @@ ForwardDominanceFrontierBase<BlockT>::calculate(const DomTreeT &DT,
     }
 
   } while (!workList.empty());
-
-  return *Result;
 }
 
 } // end namespace llvm

``````````

</details>


https://github.com/llvm/llvm-project/pull/178708