[llvm] [LiveDebugValues] Avoid repeated hash lookups (NFC) (PR #110398)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-debuginfo

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>

Note that we must use insert_or_assign because operator[] would
require DbgValue to have the default constructor.


---
Full diff: https://github.com/llvm/llvm-project/pull/110398.diff


1 Files Affected:

- (modified) llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h (+2-6) 


``````````diff
diff --git a/llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h b/llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h
index 5c095e79599f6a..f157ffc6bcc2d7 100644
--- a/llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h
+++ b/llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h
@@ -1070,9 +1070,7 @@ class VLocTracker {
                        : DbgValue(Properties, DbgValue::Undef);
 
     // Attempt insertion; overwrite if it's already mapped.
-    auto Result = Vars.insert(std::make_pair(VarID, Rec));
-    if (!Result.second)
-      Result.first->second = Rec;
+    Vars.insert_or_assign(VarID, Rec);
     Scopes[VarID] = MI.getDebugLoc().get();
 
     considerOverlaps(Var, MI.getDebugLoc().get());
@@ -1100,9 +1098,7 @@ class VLocTracker {
       DbgValue Rec = DbgValue(EmptyProperties, DbgValue::Undef);
 
       // Attempt insertion; overwrite if it's already mapped.
-      auto Result = Vars.insert(std::make_pair(OverlappedID, Rec));
-      if (!Result.second)
-        Result.first->second = Rec;
+      Vars.insert_or_assign(OverlappedID, Rec);
       Scopes[OverlappedID] = Loc;
     }
   }

``````````

</details>


https://github.com/llvm/llvm-project/pull/110398