[PATCH] D152396: [clang][doc] Rescue some deleted bits of the command-line reference.

[Eli Friedman via Phabricator via cfe-commits]

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Back when the command-line reference rst was in-tree, a lot of people missed the "DO NOT EDIT" comment at the top, and then changes were effectively reverted when the file was regenerated. I went through the changes, and rescued the interesting bits of documentation that were destroyed.  (Noticed when I was trying to find our documentation for -fno-delete-null-pointer-checks, but it was missing.)

Additional notes:

- I'm intentionally leaving out D73459 <https://reviews.llvm.org/D73459> because I'm not sure how to port the changes to -march.
- Some options have help text in Options.td, but that text doesn't make it into the reference. Incomplete list of such options: -fc++-static-destructors, -frtti-data, -fplt, -fstrict-return, -funique-section-names, -fuse-init-array. I think there's something specifically weird with boolean options, but not completely sure what's happening.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D152396

Files:
  clang/include/clang/Driver/Options.td

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