[clang] [clang modules] Setting `DebugCompilationDir` when it is safe to ignore current working directory (PR #128446)

[Jan Svoboda via cfe-commits]

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@@ -129,6 +129,26 @@ static void optimizeDiagnosticOpts(DiagnosticOptions &Opts,
   Opts.Remarks.clear();
 }
 
+static void optimizeCWD(FileSystemOptions &FSOpts, CodeGenOptions &CGOpts,
+                        const std::string &CWD) {
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jansvoboda11 wrote:

In LLVM we typically use `StringRef` instead of `const std::string &`.

https://github.com/llvm/llvm-project/pull/128446