https://github.com/kazutakahirata created
https://github.com/llvm/llvm-project/pull/110950
None
>From 9be1bde51a7b095b285bdfb81123749b6364d524 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <k...@google.com>
Date: Wed, 2 Oct 2024 07:02:53 -0700
Subject: [PATCH] [Serialization] Avoid repeated hash lookups (NFC)
---
clang/lib/Serialization/GlobalModuleIndex.cpp | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/clang/lib/Serialization/GlobalModuleIndex.cpp
b/clang/lib/Serialization/GlobalModuleIndex.cpp
index 1163943c5dffaa..9c48712a0b3fbe 100644
--- a/clang/lib/Serialization/GlobalModuleIndex.cpp
+++ b/clang/lib/Serialization/GlobalModuleIndex.cpp
@@ -430,14 +430,13 @@ namespace {
/// Retrieve the module file information for the given file.
ModuleFileInfo &getModuleFileInfo(FileEntryRef File) {
- auto Known = ModuleFiles.find(File);
- if (Known != ModuleFiles.end())
- return Known->second;
-
- unsigned NewID = ModuleFiles.size();
- ModuleFileInfo &Info = ModuleFiles[File];
- Info.ID = NewID;
- return Info;
+ auto [It, Inserted] = ModuleFiles.try_emplace(File);
+ if (Inserted) {
+ unsigned NewID = ModuleFiles.size();
+ ModuleFileInfo &Info = It->second;
+ Info.ID = NewID;
+ }
+ return It->second;
}
public:
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