[Bug tree-optimization/58131] New: ICE in execute, tree-vrp.c:9616 (in both 32-bit and 64-bit modes)

[Bug tree-optimization/58131] New: ICE in execute, tree-vrp.c:9616 (in both 32-bit and 64-bit modes)

[su at cs dot ucdavis.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58131

            Bug ID: 58131
           Summary: ICE in execute, tree-vrp.c:9616 (in both 32-bit and
                    64-bit modes)
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: su at cs dot ucdavis.edu

The following code causes an ICE when compiled with the current gcc trunk at
-O3 on x86_64-linux (both 32-bit and 64-bit modes). This is a regression from
4.8.x.

$ gcc-trunk -v
gcc version 4.9.0 20130811 (experimental) [trunk revision 201651] (GCC) 
$ gcc-trunk -O2 -c small.c  
$ gcc-4.8 -O3 -c small.c
$ gcc-trunk -O3 -c small.c
small.c: In function ‘foo’:
small.c:5:6: internal compiler error: Segmentation fault
 void foo ()
      ^
0x7e02bf crash_signal
    ../../gcc-trunk/gcc/toplev.c:335
0x808dfb ssa_default_def(function*, tree_node*)
    ../../gcc-trunk/gcc/tree-dfa.c:314
0x8090c0 get_or_create_ssa_default_def(function*, tree_node*)
    ../../gcc-trunk/gcc/tree-dfa.c:362
0x822a1a get_reaching_def
    ../../gcc-trunk/gcc/tree-into-ssa.c:1184
0x8289ca maybe_replace_use
    ../../gcc-trunk/gcc/tree-into-ssa.c:1784
0x8289ca rewrite_update_stmt
    ../../gcc-trunk/gcc/tree-into-ssa.c:1967
0x8289ca rewrite_update_enter_block
    ../../gcc-trunk/gcc/tree-into-ssa.c:2136
0xb43e9a walk_dominator_tree(dom_walk_data*, basic_block_def*)
    ../../gcc-trunk/gcc/domwalk.c:210
0x8216e3 rewrite_blocks
    ../../gcc-trunk/gcc/tree-into-ssa.c:2216
0x827c7e update_ssa(unsigned int)
    ../../gcc-trunk/gcc/tree-into-ssa.c:3319
0x940aa8 insert_range_assertions
    ../../gcc-trunk/gcc/tree-vrp.c:6102
0x940aa8 execute_vrp
    ../../gcc-trunk/gcc/tree-vrp.c:9515
0x940aa8 execute
    ../../gcc-trunk/gcc/tree-vrp.c:9616
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.
$ 



------------------------------------------------------------


short a;
int b, c;
int d[1][4][2];

void foo ()
{
  int *e;
  for (b = 1;; b--)
    {
      if (*e)
    break;
      for (c = 2; c >= 0; c--)
        {
      *e |= d[0][3][b] != a;
      int *f = &d[0][3][b];
      *f = 0;
        }
    }
}
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/53349] Internal compiler error with constexpr and recursive data type
Date: Sun, 11 Aug 2013 21:50:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idS349

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.9.0

--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Original testcase compiles fine in mainline. I'm adding it and closing the bug.

[Bug tree-optimization/58131] ICE in execute, tree-vrp.c:9616 (in both 32-bit and 64-bit modes)

[mpolacek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58131

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |mpolacek at gcc dot gnu.org
         Resolution|---                         |DUPLICATE

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Dup (no ICE with -fno-tree-reassoc).

*** This bug has been marked as a duplicate of bug 57393 ***

[Bug tree-optimization/58131] ICE in execute, tree-vrp.c:9616 (in both 32-bit and 64-bit modes)

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58131

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 27 23:41:56 2013
New Revision: 205466

URL: http://gcc.gnu.org/viewcvs?rev=205466&root=gcc&view=rev
Log:
    PR middle-end/57393
    PR tree-optimization/58018
    PR tree-optimization/58131
    * gcc.dg/torture/pr57393-1.c: New test.
    * gcc.dg/torture/pr57393-2.c: New test.
    * gcc.dg/torture/pr57393-3.c: New test.
    * gcc.dg/torture/pr58018.c: New test.
    * gcc.dg/torture/pr58131.c: New test.
    * gfortran.dg/pr57393-1.f90: New test.
    * gfortran.dg/pr57393-2.f90: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr57393-1.c
    trunk/gcc/testsuite/gcc.dg/torture/pr57393-2.c
    trunk/gcc/testsuite/gcc.dg/torture/pr57393-3.c
    trunk/gcc/testsuite/gcc.dg/torture/pr58018.c
    trunk/gcc/testsuite/gcc.dg/torture/pr58131.c
    trunk/gcc/testsuite/gfortran.dg/pr57393-1.f90
    trunk/gcc/testsuite/gfortran.dg/pr57393-2.f90
Modified:
    trunk/gcc/testsuite/ChangeLog