[Bug target/94986] missing diagnostic on ARM thumb2 compilation with -pg when using r7 in inline asm

[wilco at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94986

Wilco <wilco at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |INVALID
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #3 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to nsz from comment #2)
> on arm the -pg abi is
> 
> func:
>   push {lr}
>   bl _gnu_mcount_nc
>   ...
> 
> so no frame pointer is involved, -pg implying
> -fno-omit-frame-pointer is a historical mistake i think
> (because some targets required fp for -pg, but most don't).

Right, so the claim that -pg implies -fno-omit-frame-pointer is wrong, and that
means there is no bug in GCC. Looking at the latest docs, there is no mention
of frame pointer for the -pg option, and neither does -fomit-frame-pointer
discuss -pg. So this dependency must have been removed some time ago.

> ideally r7 clobber would just work with -pg -fomit-frame-pointer.
> the alloca problem is a separate issue (that r7 clobber may not
> work with alloca).

GCC correctly reports the error for that. So this can be closed then.