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From: "Joost.VandeVondele at mat dot ethz.ch" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/66100] New: [6.0 Regression] Matmul ICE in simplify_bound
Date: Mon, 11 May 2015 05:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66100

            Bug ID: 66100
           Summary: [6.0 Regression] Matmul ICE in simplify_bound
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: Joost.VandeVondele at mat dot ethz.ch
  Target Milestone: ---

> cat bug.f90
MODULE qs_integrate_potential_low
  INTEGER, PARAMETER :: dp = 8
  TYPE cell_type
    REAL(KIND=8) :: h_inv(3,3)
  END TYPE
  TYPE(cell_type), POINTER                 :: cell
  REAL(KIND=dp), DIMENSION(3)              :: rp
  CONTAINS
    SUBROUTINE integrate_general_opt()
    REAL(KIND=dp) :: gp(3)
    INTEGER :: ng
      gp=MATMUL(cell%h_inv,rp)*ng
    END SUBROUTINE integrate_general_opt
END MODULE qs_integrate_potential_low

with 

gcc version 6.0.0 20150511 (experimental) [trunk revision 222989] (GCC) 

> gfortran -O1 bug.f90
f951: internal compiler error: in simplify_bound, at fortran/simplify.c:3467
0x659389 simplify_bound
        ../../gcc/gcc/fortran/simplify.c:3463
0x5f7fa1 do_simplify
        ../../gcc/gcc/fortran/intrinsic.c:4149
0x605618 gfc_intrinsic_func_interface(gfc_expr*, int)
        ../../gcc/gcc/fortran/intrinsic.c:4403
0x5edf62 gfc_simplify_expr(gfc_expr*, int)
        ../../gcc/gcc/fortran/expr.c:1837
0x708365 get_array_inq_function
        ../../gcc/gcc/fortran/frontend-passes.c:2018
0x70d5a9 scalarized_expr
        ../../gcc/gcc/fortran/frontend-passes.c:2657
0x70b8e2 inline_matmul_assign
        ../../gcc/gcc/fortran/frontend-passes.c:3000
0x70bde9 gfc_code_walker(gfc_code**, int (*)(gfc_code**, int*, void*), int
(*)(gfc_expr**, int*, void*), void*)
        ../../gcc/gcc/fortran/frontend-passes.c:3188
0x70ce6b optimize_namespace
        ../../gcc/gcc/fortran/frontend-passes.c:989
0x70ce38 optimize_namespace
        ../../gcc/gcc/fortran/frontend-passes.c:995
0x70cfc3 gfc_run_passes(gfc_namespace*)
        ../../gcc/gcc/fortran/frontend-passes.c:129
0x637bda gfc_parse_file()
        ../../gcc/gcc/fortran/parse.c:5477
0x678ef5 gfc_be_parse_file
        ../../gcc/gcc/fortran/f95-lang.c:228
Please submit a full bug report,
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Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.