[Bug target/61904] Incorrect stack red-zoning on x86-64 code generation

["torvalds at linux-foundation dot org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61904

--- Comment #4 from Linus Torvalds <torvalds@linux-foundation.org> ---
As I already mentioned to Jakub Jelinek separately in the original email thread
about the kernel problem:

 "Note that I don't personally have a reproducer (my machine has
  gcc-4.8.3, and I don't see the same behavior), but I included the
  incorrect fair.s file that Michel sent me (which has all the command
  line options in it), and a pre-processed "fair.i" source file that I
  generated and that *should* match the configuration that was the
  source for that result. So there might be some version/configuration
  skew there between the two files, but I think they match.

  Holler if you cannot reproduce the problem based on that."

so if the attached *.i and resulting buggy *.s files don't match up perfectly,
that's the explanation.