https://github.com/spavloff created https://github.com/llvm/llvm-project/pull/139492
There are checks in clang codebase that determine the type of source file, associated with a given location - specifically, if it is an ordonary file or comes from sources like command-line options or a built-in definitions. These checks often rely on calls to `getPresumedLoc`, which is relatively expensive. In certain cases, these checks are combined, leading to repeated calculations of the costly function negatively affecting compile time. This change tries to optimize such checks. It must fix compile time regression introduced in https://github.com/llvm/llvm-project/pull/137306/. <!DOCTYPE html> <html> <head> <meta http-equiv="Content-type" content="text/html; charset=utf-8"> <meta http-equiv="Content-Security-Policy" content="default-src 'none'; base-uri 'self'; connect-src 'self'; form-action 'self'; img-src 'self' data:; script-src 'self'; style-src 'unsafe-inline'"> <meta content="origin" name="referrer"> <title>Rate limit · GitHub</title> <meta name="viewport" content="width=device-width"> <style type="text/css" media="screen"> body { background-color: #f6f8fa; color: #24292e; font-family: -apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol; font-size: 14px; line-height: 1.5; margin: 0; } .container { margin: 50px auto; max-width: 600px; text-align: center; padding: 0 24px; } a { color: #0366d6; text-decoration: none; } a:hover { text-decoration: underline; } h1 { line-height: 60px; 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