[Bug tree-optimization/121730] [13/14/15/16 regression] wrong code at -O1 on x86_64-linux-gnu (generated code hangs) since r11-6188-g0b76990a9d75d9

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121730

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2025-08-30
             Status|UNCONFIRMED                 |NEW
         Depends on|                            |40209
     Ever confirmed|0                           |1

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I am 99% sure this is another one of the REG_UNUSED vs single_use issues.

They show up much more in x86 since x86 has a div/mod instruction.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40209
[Bug 40209] stale REG_UNUSED note vs single_set