[Bug c/63554] New: ice in "execute_todo, at passes.c:1797" with -O3

[Bug c/63554] New: ice in "execute_todo, at passes.c:1797" with -O3

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63554

            Bug ID: 63554
           Summary: ice in "execute_todo, at passes.c:1797" with -O3
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com

Created attachment 33731
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33731&action=edit
C source code

Attached code, when compiled by 20141015, with flag -O3,
does the following

$ ../results/bin/gcc -c -O3 bug167.c
utilmod.c: In function ‘nssutil_AddSecmodDBEntry.isra.2’:
utilmod.c:609:1: internal compiler error: in execute_todo, at passes.c:1797
0xa1351b execute_todo
    ../../src/trunk/gcc/passes.c:1797
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$

The code is fine with -O2.

$ ../results/bin/gcc -c -O2 bug167.c
$
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Subject: [Bug c/63554] [5 Regression] ice in "execute_todo, at passes.c:1797" with -O3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63554

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-10-16
                 CC|                            |trippels at gcc dot gnu.org
   Target Milestone|---                         |5.0
            Summary|ice in "execute_todo, at    |[5 Regression] ice in
                   |passes.c:1797" with -O3     |"execute_todo, at
                   |                            |passes.c:1797" with -O3
     Ever confirmed|0                           |1

--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
 ~ % cat bug167.c
char *a;
void
nssutil_ReadSecmodDB (void)
{
  long b = __builtin_object_size (0, 0);
  a = __builtin___strncat_chk (a, " ", 1, b);
}

 ~ % gcc -c -O2 bug167.c
bug167.c: In function ‘nssutil_ReadSecmodDB’:
bug167.c:3:1: internal compiler error: in execute_todo, at passes.c:1797
 nssutil_ReadSecmodDB (void)
 ^
0x10650633 execute_todo
        ../../gcc/gcc/passes.c:1797
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Subject: [Bug c++/49604] forward-declared enum's elements in class scope gets default access (class vs struct)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idI604

Melissa <myriachan at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |myriachan at gmail dot com

--- Comment #3 from Melissa <myriachan at gmail dot com> ---
Happens for me on 5.0.0 build 2014/10/15 (via wandbox) through 4.6.x - whenever
typed enums were added.

Simpler test case than the original:


class MyTable {
public:
    enum Constants : unsigned;
};

enum MyTable::Constants : unsigned {
    LENGTH = 12,
};

int main()
{
    return MyTable::LENGTH;
}

[Bug c/63554] [5 Regression] ice in "execute_todo, at passes.c:1797" with -O3

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63554

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

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

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.

[Bug c/63554] [5 Regression] ice in "execute_todo, at passes.c:1797" with -O3

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63554

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

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

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.

[Bug c/63554] [5 Regression] ice in "execute_todo, at passes.c:1797" with -O3

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63554

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Oct 16 12:25:52 2014
New Revision: 216315

URL: https://gcc.gnu.org/viewcvs?rev=216315&root=gcc&view=rev
Log:
2014-10-16  Richard Biener  <rguenther@suse.de>

    PR middle-end/63554
    * builtins.c (fold_builtin_4): Do not call fold_builtin_strncat_chk.
    (fold_builtin_strncat_chk): Move ...
    * gimple-fold.c (gimple_fold_builtin_strncat_chk): ... here.
    (gimple_fold_builtin): Call gimple_fold_builtin_strncat_chk.

    * gcc.dg/torture/pr63554.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr63554.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/builtins.c
    trunk/gcc/gimple-fold.c
    trunk/gcc/testsuite/ChangeLog