[Bug c/33316] New: [4.2.1 regression] ICE on valid variable-length automatic array in const struct

[Bug c/33316] New: [4.2.1 regression] ICE on valid variable-length automatic array in const struct

[radford at blackbean dot org]

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The following gives an ICE when compiled with -g.  Removing -g, removing the
const or making data[] a constant size will allow it to be compiled.

int f(void *p, int length)
{
  const struct {
    int data[length];
  } *array = p;
  return array[0].data[0];
}

$ gcc -g -c t.c
t.c: In function ‘f’:
t.c:8: internal compiler error: Segmentation fault

$ gcc -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ./configure --enable-languages=c
Thread model: posix
gcc version 4.2.1


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           Summary: [4.2.1 regression] ICE on valid variable-length
                    automatic array in const struct
           Product: gcc
           Version: 4.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: radford at blackbean dot org
 GCC build triplet: x86_64-linux-gnu
  GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33316

[Bug debug/33316] [4.2/4.3 regression] ICE on valid variable-length automatic array in const struct

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2007-09-05 20:20 -------
Confirmed.


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
  GCC build triplet|x86_64-linux-gnu            |
   GCC host triplet|x86_64-linux-gnu            |
 GCC target triplet|x86_64-linux-gnu            |dwarf2
           Keywords|                            |ice-on-valid-code
      Known to fail|                            |4.2.0 4.3.0
      Known to work|                            |4.1.1
   Last reconfirmed|0000-00-00 00:00:00         |2007-09-05 20:20:59
               date|                            |
            Summary|[4.2 regression] ICE on     |[4.2/4.3 regression] ICE on
                   |valid variable-length       |valid variable-length
                   |automatic array in const    |automatic array in const
                   |struct                      |struct
   Target Milestone|---                         |4.2.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33316

[Bug debug/33316] [4.2/4.3 regression] ICE on valid variable-length automatic array in const struct

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2007-09-05 20:24 -------
This looks similar to PR29970.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33316

[Bug debug/33316] [4.2/4.3 regression] ICE on valid variable-length automatic array in const struct

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2007-09-05 20:26 -------
(In reply to comment #2)
> This looks similar to PR29970.

It is unrelated.  There is no leak of a type here.  The issue is we are looking
at the type's name which does not exist or something like that.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33316

[Bug debug/33316] [4.2/4.3 regression] ICE on valid variable-length automatic array in const struct

[jakub at gcc dot gnu dot org]

------- Comment #4 from jakub at gcc dot gnu dot org  2007-09-20 21:27 -------
Subject: Bug 33316

Author: jakub
Date: Thu Sep 20 21:27:39 2007
New Revision: 128631

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=128631
Log:
        PR debug/33316
        * dwarf2out.c (modified_type_die): Handle TYPE_DECL with NULL
        DECL_NAME.
        * dbxout.c (dbxout_type): Likewise.

        * gcc.dg/debug/pr33316.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/debug/pr33316.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/dbxout.c
    trunk/gcc/dwarf2out.c
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33316

[Bug debug/33316] [4.2/4.3 regression] ICE on valid variable-length automatic array in const struct

[jakub at gcc dot gnu dot org]

------- Comment #5 from jakub at gcc dot gnu dot org  2007-09-24 09:17 -------
Subject: Bug 33316

Author: jakub
Date: Mon Sep 24 09:17:10 2007
New Revision: 128709

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=128709
Log:
        PR debug/33316
        * dwarf2out.c (modified_type_die): Handle TYPE_DECL with NULL
        DECL_NAME.
        * dbxout.c (dbxout_type): Likewise.

        * gcc.dg/debug/pr33316.c: New test.

Added:
    branches/gcc-4_2-branch/gcc/testsuite/gcc.dg/debug/pr33316.c
Modified:
    branches/gcc-4_2-branch/gcc/ChangeLog
    branches/gcc-4_2-branch/gcc/dbxout.c
    branches/gcc-4_2-branch/gcc/dwarf2out.c
    branches/gcc-4_2-branch/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33316

[Bug debug/33316] [4.2/4.3 regression] ICE on valid variable-length automatic array in const struct

[jakub at gcc dot gnu dot org]

------- Comment #6 from jakub at gcc dot gnu dot org  2007-09-24 09:18 -------
Fixed.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33316

[Bug debug/33316] [4.2/4.3 regression] ICE on valid variable-length automatic array in const struct

[mmitchel at gcc dot gnu dot org]

------- Comment #7 from mmitchel at gcc dot gnu dot org  2007-09-28 04:03 -------
Jakub checked in a patch for this, but this bug was never closed.


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mmitchel at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33316