[clang] [lld] [lld][COFF] Add optimization remarks options to lld-link (PR #205390)

[Martin Storsjö via cfe-commits]

================
@@ -360,6 +360,34 @@ defm prefetch_inputs : B<"prefetch-inputs",
                          "possible, to improve link times",
                          "Do not prefetch input files (default)">;
 
+def opt_remarks_filename: Separate<["-"], "opt-remarks-filename">,
+  HelpText<"YAML output file for optimization remarks">;
+def opt_remarks_passes: Separate<["-"], "opt-remarks-passes">,
+  HelpText<"Regex for the passes that need to be serialized to the output file">;
+def opt_remarks_format: Separate<["-"], "opt-remarks-format">,
+  HelpText<"The format used for serializing remarks (default: YAML)">;
+def opt_remarks_with_hotness: F<"opt-remarks-with-hotness">,
+  HelpText<"Include hotness information in the optimization remarks file">;
+def opt_remarks_hotness_threshold: P<"opt-remarks-hotness-threshold",
+  "Minimum profile count required for an optimization remark to be output. "
+  "Use 'auto' to apply the threshold from profile summary.">;
+
+def: F<"plugin-opt=opt-remarks-filename=">,
----------------
mstorsjo wrote:

Having `F<>` for an option that actually does take a value seems odd - but perhaps it doesn't make any difference when it's an alias?

https://github.com/llvm/llvm-project/pull/205390