[llvm] [InstCombine] Avoid repeated hash lookups (NFC) (PR #111618)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-transforms

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/111618.diff


1 Files Affected:

- (modified) llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp (+3-2) 


``````````diff
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
index 6c3fc987d9add2..d1eb84b5ca5c10 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
@@ -602,8 +602,9 @@ static Value *rewriteGEPAsOffset(Value *Start, Value *Base, GEPNoWrapFlags NW,
       for (unsigned I = 0, E = PHI->getNumIncomingValues(); I < E; ++I) {
         Value *NewIncoming = PHI->getIncomingValue(I);
 
-        if (NewInsts.contains(NewIncoming))
-          NewIncoming = NewInsts[NewIncoming];
+        auto It = NewInsts.find(NewIncoming);
+        if (It != NewInsts.end())
+          NewIncoming = It->second;
 
         NewPhi->addIncoming(NewIncoming, PHI->getIncomingBlock(I));
       }

``````````

</details>


https://github.com/llvm/llvm-project/pull/111618