[clang] 280d2a3 - [AST] Avoid repeated hash lookups (NFC) (#126461)

[via cfe-commits]

Author: Kazu Hirata
Date: 2025-02-10T07:48:57-08:00
New Revision: 280d2a3035ad362cb9dab9f59aa9bdbb88723e9e

URL: https://github.com/llvm/llvm-project/commit/280d2a3035ad362cb9dab9f59aa9bdbb88723e9e
DIFF: https://github.com/llvm/llvm-project/commit/280d2a3035ad362cb9dab9f59aa9bdbb88723e9e.diff

LOG: [AST] Avoid repeated hash lookups (NFC) (#126461)

Added: 
    

Modified: 
    clang/lib/AST/RawCommentList.cpp

Removed: 
    


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diff  --git a/clang/lib/AST/RawCommentList.cpp b/clang/lib/AST/RawCommentList.cpp
index fddedd3a31856a3..9658c6ab3d39dd6 100644
--- a/clang/lib/AST/RawCommentList.cpp
+++ b/clang/lib/AST/RawCommentList.cpp
@@ -287,13 +287,13 @@ void RawCommentList::addComment(const RawComment &RC,
 
   // If this is the first Doxygen comment, save it (because there isn't
   // anything to merge it with).
-  if (OrderedComments[CommentFile].empty()) {
-    OrderedComments[CommentFile][CommentOffset] =
-        new (Allocator) RawComment(RC);
+  auto &OC = OrderedComments[CommentFile];
+  if (OC.empty()) {
+    OC[CommentOffset] = new (Allocator) RawComment(RC);
     return;
   }
 
-  const RawComment &C1 = *OrderedComments[CommentFile].rbegin()->second;
+  const RawComment &C1 = *OC.rbegin()->second;
   const RawComment &C2 = RC;
 
   // Merge comments only if there is only whitespace between them.