[llvm] [Scalar] Avoid repeated hash lookups (NFC) (PR #131961)

[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/131961.diff


1 Files Affected:

- (modified) llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp (+2-3) 


``````````diff
diff --git a/llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp b/llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
index c7b55c2fb4f45..68c079373e556 100644
--- a/llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
+++ b/llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
@@ -1138,13 +1138,12 @@ static Value *findBasePointer(Value *I, DefiningValueMapTy &Cache,
   auto getBaseForInput = [&](Value *Input, Instruction *InsertPt) {
     Value *BDV = findBaseOrBDV(Input, Cache, KnownBases);
     Value *Base = nullptr;
-    if (!States.count(BDV)) {
+    if (auto It = States.find(BDV); It == States.end()) {
       assert(areBothVectorOrScalar(BDV, Input));
       Base = BDV;
     } else {
       // Either conflict or base.
-      assert(States.count(BDV));
-      Base = States[BDV].getBaseValue();
+      Base = It->second.getBaseValue();
     }
     assert(Base && "Can't be null");
     // The cast is needed since base traversal may strip away bitcasts

``````````

</details>


https://github.com/llvm/llvm-project/pull/131961