[Bug debug/94285] New: [9/10 Regression] gfortran: error: gcc/testsuite/gfortran.dg/array_constructor_40.f90: ‘-fcompare-debug’ failure (length) sincer10-1654-gffdc40a90faec54d

[Bug debug/94285] New: [9/10 Regression] gfortran: error: gcc/testsuite/gfortran.dg/array_constructor_40.f90: ‘-fcompare-debug’ failure (length) sincer10-1654-gffdc40a90faec54d

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94285

            Bug ID: 94285
           Summary: [9/10 Regression] gfortran: error:
                    gcc/testsuite/gfortran.dg/array_constructor_40.f90:
                    ‘-fcompare-debug’ failure (length)
                    sincer10-1654-gffdc40a90faec54d
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---

I see the following error:

$ gfortran
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/array_constructor_40.f90
-fcompare-debug -fno-tree-dominator-opts -fno-tree-vrp -Os
gfortran: error:
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/array_constructor_40.f90:
‘-fcompare-debug’ failure (length)

[Bug debug/94285] [9/10 Regression] gfortran: error: gcc/testsuite/gfortran.dg/array_constructor_40.f90: ‘-fcompare-debug’ failure (length) sincer10-1654-gffdc40a90faec54d

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94285

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2020-03-23
           Priority|P3                          |P2
                 CC|                            |ebotcazou at gcc dot gnu.org
     Ever confirmed|0                           |1
      Known to work|                            |9.2.0
             Status|UNCONFIRMED                 |NEW
      Known to fail|                            |10.0, 9.3.0

[Bug debug/94285] [9/10 Regression] gfortran: error: gcc/testsuite/gfortran.dg/array_constructor_40.f90: ‘-fcompare-debug’ failure (length) sincer10-1654-gffdc40a90faec54d

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94285

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |9.4

[Bug debug/94285] [9/10 Regression] gfortran: error: gcc/testsuite/gfortran.dg/array_constructor_40.f90: ‘-fcompare-debug’ failure (length) since r10-1654

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94285

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |jakub at gcc dot gnu.org
             Status|NEW                         |ASSIGNED

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 48097
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48097&action=edit
gcc10-pr94285.patch

Untested fix.

[Bug debug/94285] [9/10 Regression] gfortran: error: gcc/testsuite/gfortran.dg/array_constructor_40.f90: ‘-fcompare-debug’ failure (length) since r10-1654

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94285

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:565ab7efbdc68cca5a2a81d872015f33359048b4

commit r10-7351-g565ab7efbdc68cca5a2a81d872015f33359048b4
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Tue Mar 24 09:36:32 2020 +0100

    loop-manip: Avoid -fcompare-debug issues in create_iv [PR94285]

    The following testcase FAILs with -fcompare-debug.  The problem is that
    create_iv behaves differently when inserting after into an empty bb (in
that
    case sets location to goto_locus), or when inserting before gsi_end_p (i.e.
    at the end of bb; in that case it will not set location, otherwise it will
    set it to the location of next stmt).
    This isn't -fcompare-debug friendly, because if inserting after and the
    bb contains only debug stmts, then the location will not be set with -g
    and will be with -g0, or when inserting before, the location might either
    be set from the following debug stmt rather than some non-debug stmt after
    that, or might not be set with -g0 if it is to be inserted at the end of
bb,
    while with -g would be set to location of debug stmt.

    2020-03-24  Jakub Jelinek  <jakub@redhat.com>

            PR debug/94285
            * tree-ssa-loop-manip.c (create_iv): If after, set stmt location to
            e->goto_locus even if gsi_bb (*incr_pos) contains only debug stmts.
            If not after and at *incr_pos is a debug stmt, set stmt location to
            location of next non-debug stmt after it if any.

            * gfortran.dg/pr94285.f90: New test.

[Bug debug/94285] [9 Regression] gfortran: error: gcc/testsuite/gfortran.dg/array_constructor_40.f90: ‘-fcompare-debug’ failure (length) since r10-1654

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94285

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[9/10 Regression] gfortran: |[9 Regression] gfortran:
                   |error:                      |error:
                   |gcc/testsuite/gfortran.dg/a |gcc/testsuite/gfortran.dg/a
                   |rray_constructor_40.f90:    |rray_constructor_40.f90:
                   |‘-fcompare-debug’ failure   |‘-fcompare-debug’ failure
                   |(length) since r10-1654     |(length) since r10-1654

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.

[Bug debug/94285] [9 Regression] gfortran: error: gcc/testsuite/gfortran.dg/array_constructor_40.f90: ‘-fcompare-debug’ failure (length) since r10-1654

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94285

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|9.4                         |9.5

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 9.4 is being released, retargeting bugs to GCC 9.5.

[Bug debug/94285] [9 Regression] gfortran: error: gcc/testsuite/gfortran.dg/array_constructor_40.f90: ‘-fcompare-debug’ failure (length) since r10-1654

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94285

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|ASSIGNED                    |RESOLVED
   Target Milestone|9.5                         |10.0

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed in GCC 10.