[llvm] [Analysis] Avoid repeated hash lookups (NFC) (PR #127955)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-analysis

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/127955.diff


1 Files Affected:

- (modified) llvm/lib/Analysis/LoopAccessAnalysis.cpp (+1-1) 


``````````diff
diff --git a/llvm/lib/Analysis/LoopAccessAnalysis.cpp b/llvm/lib/Analysis/LoopAccessAnalysis.cpp
index 5dc5b025599b1..a2bbe6fb11c09 100644
--- a/llvm/lib/Analysis/LoopAccessAnalysis.cpp
+++ b/llvm/lib/Analysis/LoopAccessAnalysis.cpp
@@ -1431,8 +1431,8 @@ void AccessAnalysis::processMemAccesses() {
           typedef SmallVector<const Value *, 16> ValueVector;
           ValueVector TempObjects;
 
-          UnderlyingObjects[Ptr] = {};
           SmallVector<const Value *, 16> &UOs = UnderlyingObjects[Ptr];
+          UOs = {};
           ::getUnderlyingObjects(Ptr, UOs, LI);
           LLVM_DEBUG(dbgs()
                      << "Underlying objects for pointer " << *Ptr << "\n");

``````````

</details>


https://github.com/llvm/llvm-project/pull/127955