[Bug tree-optimization/54920] New: [4.8 Regression] segfault in tree-ssa-pre.c during Firefox build

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* [Bug tree-optimization/54920] New: [4.8 Regression] segfault in tree-ssa-pre.c during Firefox build
@ 2012-10-13 13:50 markus at trippelsdorf dot de
  2012-10-14  8:27 ` [Bug tree-optimization/54920] " glisse at gcc dot gnu.org
                   ` (4 more replies)
  0 siblings, 5 replies; 6+ messages in thread
From: markus at trippelsdorf dot de @ 2012-10-13 13:50 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54920

             Bug #: 54920
           Summary: [4.8 Regression] segfault in tree-ssa-pre.c during
                    Firefox build
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: markus@trippelsdorf.de


insert_into_preds_of_block (block=0x7ffff2dba1f8, block@entry=0x7ffff6665dd0,
exprnum=<optimized out>, avail=0x7ffff2dba1f8)
    at /home/markus/gcc/gcc/tree-ssa-pre.c:3085
3085      FOR_EACH_EDGE (pred, ei, block->preds)
(gdb) bt
#0  insert_into_preds_of_block (block=0x7ffff2dba1f8,
block@entry=0x7ffff6665dd0, exprnum=<optimized out>, avail=0x7ffff2dba1f8)
    at /home/markus/gcc/gcc/tree-ssa-pre.c:3085
#1  0x00000000009a760e in do_regular_insertion (block=<optimized out>,
dom=<optimized out>) at /home/markus/gcc/gcc/tree-ssa-pre.c:3385
#2  insert_aux (block=block@entry=0x7ffff6665dd0) at
/home/markus/gcc/gcc/tree-ssa-pre.c:3599
#3  0x00000000009a7008 in insert_aux (block=block@entry=0x7ffff516bb60) at
/home/markus/gcc/gcc/tree-ssa-pre.c:3609
#4  0x00000000009a7008 in insert_aux (block=block@entry=0x7ffff66884e0) at
/home/markus/gcc/gcc/tree-ssa-pre.c:3609
#5  0x00000000009a7008 in insert_aux (block=block@entry=0x7ffff6665750) at
/home/markus/gcc/gcc/tree-ssa-pre.c:3609
#6  0x00000000009a7008 in insert_aux (block=block@entry=0x7ffff66654e0) at
/home/markus/gcc/gcc/tree-ssa-pre.c:3609
#7  0x00000000009a7008 in insert_aux (block=<optimized out>) at
/home/markus/gcc/gcc/tree-ssa-pre.c:3609
#8  0x00000000009a8b9b in insert () at /home/markus/gcc/gcc/tree-ssa-pre.c:3632
#9  do_pre () at /home/markus/gcc/gcc/tree-ssa-pre.c:4707
#10 do_pre () at /home/markus/gcc/gcc/tree-ssa-pre.c:4660
#11 0x00000000007e927a in execute_one_pass (pass=pass@entry=0x112cdc0) at
/home/markus/gcc/gcc/passes.c:2320


markus@x4 src % cat test.i
typedef short __v8hi __attribute__ ((__vector_size__ (16)));
typedef long long __m128i __attribute__ ((__vector_size__ (16)));
int a;
__m128i b;

void
fn1 ()
{
    while (1)
        b = (__m128i) (__v8hi)
    {
        a, 0, 0, 0, 0, 0
    };
}

markus@x4 src % gcc -c -O2 test.i
test.i: In function ‘fn1’:
test.i:7:1: internal compiler error: Segmentation fault
 fn1 ()
 ^
linux-vdso.so.1: No such file or directory
0x88d3ef crash_signal
        /home/markus/gcc/gcc/toplev.c:335
inconsistent DWARF line number info
0x9a3ee7 insert_into_preds_of_block
        /home/markus/gcc/gcc/tree-ssa-pre.c:3092
0x9a760d do_regular_insertion
        /home/markus/gcc/gcc/tree-ssa-pre.c:3385
0x9a760d insert_aux
        /home/markus/gcc/gcc/tree-ssa-pre.c:3599
0x9a7007 insert_aux
        /home/markus/gcc/gcc/tree-ssa-pre.c:3609
0x9a7007 insert_aux
        /home/markus/gcc/gcc/tree-ssa-pre.c:3609
0x9a8b9a insert
        /home/markus/gcc/gcc/tree-ssa-pre.c:3632
0x9a8b9a do_pre
        /home/markus/gcc/gcc/tree-ssa-pre.c:4707
0x9a8b9a do_pre
        /home/markus/gcc/gcc/tree-ssa-pre.c:4660
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.


^ permalink raw reply	[flat|nested] 6+ messages in thread

* [Bug tree-optimization/54920] [4.8 Regression] segfault in tree-ssa-pre.c during Firefox build
  2012-10-13 13:50 [Bug tree-optimization/54920] New: [4.8 Regression] segfault in tree-ssa-pre.c during Firefox build markus at trippelsdorf dot de
@ 2012-10-14  8:27 ` glisse at gcc dot gnu.org
  2012-10-15  9:47 ` rguenth at gcc dot gnu.org
                   ` (3 subsequent siblings)
  4 siblings, 0 replies; 6+ messages in thread
From: glisse at gcc dot gnu.org @ 2012-10-14  8:27 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54920

Marc Glisse <glisse at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |glisse at gcc dot gnu.org

--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> 2012-10-14 08:26:54 UTC ---
In create_expression_by_pieces, I see this:

    case NARY:
      {
        vn_nary_op_t nary = PRE_EXPR_NARY (expr);
        tree genop[4];
        unsigned i;
        for (i = 0; i < nary->length; ++i)
          {
            genop[i] = find_or_generate_expression (block, nary->op[i], stmts);

Does that mean 4 is an upper bound on the size of an nary?


^ permalink raw reply	[flat|nested] 6+ messages in thread

* [Bug tree-optimization/54920] [4.8 Regression] segfault in tree-ssa-pre.c during Firefox build
  2012-10-13 13:50 [Bug tree-optimization/54920] New: [4.8 Regression] segfault in tree-ssa-pre.c during Firefox build markus at trippelsdorf dot de
  2012-10-14  8:27 ` [Bug tree-optimization/54920] " glisse at gcc dot gnu.org
@ 2012-10-15  9:47 ` rguenth at gcc dot gnu.org
  2012-10-15 11:23 ` rguenth at gcc dot gnu.org
                   ` (2 subsequent siblings)
  4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-10-15  9:47 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54920

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2012-10-15
         AssignedTo|unassigned at gcc dot       |rguenth at gcc dot gnu.org
                   |gnu.org                     |
   Target Milestone|---                         |4.8.0
     Ever Confirmed|0                           |1

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> 2012-10-15 09:47:10 UTC ---
Ouch ;)

Mine.


^ permalink raw reply	[flat|nested] 6+ messages in thread

* [Bug tree-optimization/54920] [4.8 Regression] segfault in tree-ssa-pre.c during Firefox build
  2012-10-13 13:50 [Bug tree-optimization/54920] New: [4.8 Regression] segfault in tree-ssa-pre.c during Firefox build markus at trippelsdorf dot de
  2012-10-14  8:27 ` [Bug tree-optimization/54920] " glisse at gcc dot gnu.org
  2012-10-15  9:47 ` rguenth at gcc dot gnu.org
@ 2012-10-15 11:23 ` rguenth at gcc dot gnu.org
  2012-10-15 11:28 ` rguenth at gcc dot gnu.org
  2012-10-15 11:28 ` rguenth at gcc dot gnu.org
  4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-10-15 11:23 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54920

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> 2012-10-15 11:22:54 UTC ---
Author: rguenth
Date: Mon Oct 15 11:22:49 2012
New Revision: 192454

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192454
Log:
2012-10-15  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/54920
    * tree-ssa-pre.c (create_expression_by_pieces): Properly
    allocate temporary storage for all NARY elements.

    * gcc.dg/torture/pr54920.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr54920.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-pre.c


^ permalink raw reply	[flat|nested] 6+ messages in thread

* [Bug tree-optimization/54920] [4.8 Regression] segfault in tree-ssa-pre.c during Firefox build
  2012-10-13 13:50 [Bug tree-optimization/54920] New: [4.8 Regression] segfault in tree-ssa-pre.c during Firefox build markus at trippelsdorf dot de
                   ` (2 preceding siblings ...)
  2012-10-15 11:23 ` rguenth at gcc dot gnu.org
@ 2012-10-15 11:28 ` rguenth at gcc dot gnu.org
  2012-10-15 11:28 ` rguenth at gcc dot gnu.org
  4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-10-15 11:28 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54920

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> 2012-10-15 11:28:20 UTC ---
Author: rguenth
Date: Mon Oct 15 11:28:15 2012
New Revision: 192455

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192455
Log:
2012-10-15  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/54920
    * tree-ssa-pre.c (create_expression_by_pieces): Properly
    allocate temporary storage for all NARY elements.

    * gcc.dg/torture/pr54920.c: New testcase.

Added:
    branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/torture/pr54920.c
Modified:
    branches/gcc-4_7-branch/gcc/ChangeLog
    branches/gcc-4_7-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_7-branch/gcc/tree-ssa-pre.c


^ permalink raw reply	[flat|nested] 6+ messages in thread

* [Bug tree-optimization/54920] [4.8 Regression] segfault in tree-ssa-pre.c during Firefox build
  2012-10-13 13:50 [Bug tree-optimization/54920] New: [4.8 Regression] segfault in tree-ssa-pre.c during Firefox build markus at trippelsdorf dot de
                   ` (3 preceding siblings ...)
  2012-10-15 11:28 ` rguenth at gcc dot gnu.org
@ 2012-10-15 11:28 ` rguenth at gcc dot gnu.org
  4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-10-15 11:28 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54920

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

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

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> 2012-10-15 11:28:36 UTC ---
Fixed.


^ permalink raw reply	[flat|nested] 6+ messages in thread

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2012-10-13 13:50 [Bug tree-optimization/54920] New: [4.8 Regression] segfault in tree-ssa-pre.c during Firefox build markus at trippelsdorf dot de
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