[Bug fortran/102366] New: [10/11/12 Regression] Illegal instruction with large arrays

[dominiq at lps dot ens.fr via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102366

            Bug ID: 102366
           Summary: [10/11/12 Regression] Illegal instruction with large
                    arrays
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dominiq at lps dot ens.fr
  Target Milestone: ---

The following test

REAL(KIND=4) :: a(16776325), s
a=1.0_8
END

gives at run time

Illegal instruction

a(16775301) to a(16776324) gives

Segmentation fault

and below a(16776323) the code run as expected.

This occurred between r12-3046 (OK) and r12-3430 and r10-10049 (OK) and
r10-10122. It also affects r11-8981.

Note that

REAL(KIND=4) :: a(16776325), s
a(16776325)=1.0_8
END

compiles and runs witout problem.