[Bug c/107334] New: Incorrect "infinite recursion detected" warning if base case aborts

[Bug c/107334] New: Incorrect "infinite recursion detected" warning if base case aborts

[hugo_musso_gualandi at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107334

            Bug ID: 107334
           Summary: Incorrect "infinite recursion detected" warning if
                    base case aborts
           Product: gcc
           Version: 12.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hugo_musso_gualandi at hotmail dot com
  Target Milestone: ---

Created attachment 53734
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53734&action=edit
This triggers the -Winfinite-recursion warning

When I compile the attached program with -Winfinite-recursion, GCC 12.2.1 warns
that there is infinite recursion. I expected that it should compile without
warnings. I suspect that the confusion happens because the base case of the
recursive function calls abort().

[Bug middle-end/107334] Incorrect "infinite recursion detected" warning if base case aborts

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107334

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
                 CC|                            |mpolacek at gcc dot gnu.org
     Ever confirmed|0                           |1
          Component|c                           |middle-end
   Last reconfirmed|                            |2022-10-20
           Keywords|                            |diagnostic

[Bug middle-end/107334] Incorrect "infinite recursion detected" warning if base case aborts

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107334

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think the warning message should be clearer really.
Maybe "possible infinite recursion detected" would be better.

[Bug middle-end/107334] Incorrect "infinite recursion detected" warning if base case aborts

[madhur4127 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107334

Madhur Chauhan <madhur4127 at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |madhur4127 at gmail dot com

--- Comment #2 from Madhur Chauhan <madhur4127 at gmail dot com> ---
*** Bug 109686 has been marked as a duplicate of this bug. ***

[Bug middle-end/107334] Incorrect "infinite recursion detected" warning if base case aborts

[madhur4127 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107334

--- Comment #3 from Madhur Chauhan <madhur4127 at gmail dot com> ---
I feel changing the warning text will still cause troubles for people using
-Werror. This forces to use ignore pragmas or disable this warning completely,
none of them are ideal.

Maybe disable warning in this case?