[Bug target/79748] [Enhancement] no_callee_saved_registers function attribute (on x86)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79748

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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             Target|                            |x86_64-*-*, i?86-*-*

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think IPA-RA does essentially this automagically apart from yours that would
make all regs caller-save?  It may be the target could already arrange for this
as well.