[clang] a8289a3 - [Tooling] Avoid repeated hash lookups (NFC) (#111469)

[via cfe-commits]

Author: Kazu Hirata
Date: 2024-10-08T07:28:53-07:00
New Revision: a8289a35d06b9f7cb3d9b18dba6be0f1f0a8a898

URL: https://github.com/llvm/llvm-project/commit/a8289a35d06b9f7cb3d9b18dba6be0f1f0a8a898
DIFF: https://github.com/llvm/llvm-project/commit/a8289a35d06b9f7cb3d9b18dba6be0f1f0a8a898.diff

LOG: [Tooling] Avoid repeated hash lookups (NFC) (#111469)

Added: 
    

Modified: 
    clang/lib/Tooling/Inclusions/HeaderIncludes.cpp

Removed: 
    


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diff  --git a/clang/lib/Tooling/Inclusions/HeaderIncludes.cpp b/clang/lib/Tooling/Inclusions/HeaderIncludes.cpp
index 4313da66efc0b7..0cb96097415ea8 100644
--- a/clang/lib/Tooling/Inclusions/HeaderIncludes.cpp
+++ b/clang/lib/Tooling/Inclusions/HeaderIncludes.cpp
@@ -320,12 +320,9 @@ HeaderIncludes::HeaderIncludes(StringRef FileName, StringRef Code,
   // - If CategoryEndOffset[Priority] isn't set, use the next higher value
   // that is set, up to CategoryEndOffset[Highest].
   auto Highest = Priorities.begin();
-  if (CategoryEndOffsets.find(*Highest) == CategoryEndOffsets.end()) {
-    if (FirstIncludeOffset >= 0)
-      CategoryEndOffsets[*Highest] = FirstIncludeOffset;
-    else
-      CategoryEndOffsets[*Highest] = MinInsertOffset;
-  }
+  auto [It, Inserted] = CategoryEndOffsets.try_emplace(*Highest);
+  if (Inserted)
+    It->second = FirstIncludeOffset >= 0 ? FirstIncludeOffset : MinInsertOffset;
   // By this point, CategoryEndOffset[Highest] is always set appropriately:
   //  - to an appropriate location before/after existing #includes, or
   //  - to right after the header guard, or