llvm-project

7b91afa0 - [GlobPattern] add AsLiteral to help lld determine if a symbol is literal (#215854)

[GlobPattern] add AsLiteral to help lld determine if a symbol is literal (#215854) lld determines if a `symbolName` is literal by `find_first_of("*?[]")`, which is not accurate and ignored escape characters, we do the following: 1. Add a new API `std::optional<std::string> asLiteral(...)` that dumps the pattern as a literal string if it is one. 2. All `symbolNames` are considered as `GlobPattern` first to leverage `asLeteral` to help us determine if a string is a literal. The quick path in during `GlobPattern` construction is `if (!S.find_first_of(PrefixMetas)) return Pat;`, so for strings without `*?[]` (most of the `symbolName`s), the performance should be about the same. 3. `symbolName`s that are literal go back to hashing like lld did before Added tests in lld and unit test for GlobPattern --------- Co-authored-by: Ellis Hoag <ellis.sparky.hoag@gmail.com>