[llvm-profdata] Avoid repeated hash lookups (NFC) (#111629)

kazutakahirata · web-flow · commit 55dd29c61d1b · 2024-10-08T23:02:04.000-07:00
diff --git a/llvm/tools/llvm-profdata/llvm-profdata.cpp b/llvm/tools/llvm-profdata/llvm-profdata.cpp
@@ -1220,11 +1220,9 @@ adjustInstrProfile(std::unique_ptr<WriterContext> &WC,
       }
     }
 
-    if (!StaticFuncMap.contains(NewName)) {
-      StaticFuncMap[NewName] = Name;
-    } else {
-      StaticFuncMap[NewName] = DuplicateNameStr;
-    }
+    auto [It, Inserted] = StaticFuncMap.try_emplace(NewName, Name);
+    if (!Inserted)
+      It->second = DuplicateNameStr;
   };
 
   // We need to flatten the SampleFDO profile as the InstrFDO

Original file line number	Diff line number	Diff line change
`@@ -1220,11 +1220,9 @@ adjustInstrProfile(std::unique_ptr<WriterContext> &WC,`
`1220`	`1220`	`}`
`1221`	`1221`	`}`
`1222`	`1222`
`1223`		`- if (!StaticFuncMap.contains(NewName)) {`
`1224`		`- StaticFuncMap[NewName] = Name;`
`1225`		`- } else {`
`1226`		`- StaticFuncMap[NewName] = DuplicateNameStr;`
`1227`		`- }`
	`1223`	`+ auto [It, Inserted] = StaticFuncMap.try_emplace(NewName, Name);`
	`1224`	`+ if (!Inserted)`
	`1225`	`+ It->second = DuplicateNameStr;`
`1228`	`1226`	`};`
`1229`	`1227`
`1230`	`1228`	`// We need to flatten the SampleFDO profile as the InstrFDO`