[Serialization] Remove an unnecessary cast (NFC) (#147204)

kazutakahirata · web-flow · commit 15653108b11e · 2025-07-06T19:05:52.000-07:00
IndexFromEnd is already of int.
diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
@@ -9682,7 +9682,7 @@ ModuleFile *ASTReader::getLocalModuleFile(ModuleFile &M, unsigned ID) const {
     // It's a prefix (preamble, PCH, ...). Look it up by index.
    int IndexFromEnd = static_cast<int>(ID >> 1);
     assert(IndexFromEnd && "got reference to unknown module file");
-    return getModuleManager().pch_modules().end()[-static_cast<int>(IndexFromEnd)];
+    return getModuleManager().pch_modules().end()[-IndexFromEnd];
   }
 }
 

Original file line number	Diff line number	Diff line change
`@@ -9682,7 +9682,7 @@ ModuleFile *ASTReader::getLocalModuleFile(ModuleFile &M, unsigned ID) const {`
`9682`	`9682`	`// It's a prefix (preamble, PCH, ...). Look it up by index.`
`9683`	`9683`	`int IndexFromEnd = static_cast<int>(ID >> 1);`
`9684`	`9684`	`assert(IndexFromEnd && "got reference to unknown module file");`
`9685`		`- return getModuleManager().pch_modules().end()[-static_cast<int>(IndexFromEnd)];`
	`9685`	`+ return getModuleManager().pch_modules().end()[-IndexFromEnd];`
`9686`	`9686`	`}`
`9687`	`9687`	`}`
`9688`	`9688`