[llvm] [IR] Avoid repeated hash lookups (NFC) (PR #138430)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-ir

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/138430.diff


1 Files Affected:

- (modified) llvm/lib/IR/DroppedVariableStats.cpp (+1-2) 


``````````diff
diff --git a/llvm/lib/IR/DroppedVariableStats.cpp b/llvm/lib/IR/DroppedVariableStats.cpp
index 9e221bf585f1a..b8c0dd6e7b1dc 100644
--- a/llvm/lib/IR/DroppedVariableStats.cpp
+++ b/llvm/lib/IR/DroppedVariableStats.cpp
@@ -117,8 +117,7 @@ void DroppedVariableStats::removeVarFromAllSets(VarID Var, const Function *F) {
 bool DroppedVariableStats::isScopeChildOfOrEqualTo(const DIScope *Scope,
                                                    const DIScope *DbgValScope) {
   while (Scope != nullptr) {
-    if (VisitedScope.find(Scope) == VisitedScope.end()) {
-      VisitedScope.insert(Scope);
+    if (VisitedScope.insert(Scope).second) {
       if (Scope == DbgValScope) {
         VisitedScope.clear();
         return true;

``````````

</details>


https://github.com/llvm/llvm-project/pull/138430