[Bug c/52912] New: ICE: verify_ssa failed

[Bug c/52912] New: ICE: verify_ssa failed

[regehr at cs dot utah.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52912

             Bug #: 52912
           Summary: ICE: verify_ssa failed
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: regehr@cs.utah.edu


[regehr@dyson r14]$ current-gcc -Os small.c
small.c: In function 'fn2':
small.c:12:1: error: AUX pointer initialized for edge 3->4
small.c:12:1: internal compiler error: verify_ssa failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


[regehr@dyson r14]$ cat small.c
int a, b, c;
int
fn1 (p1)
{
lbl_549:
    if (p1)
        goto lbl_549;
    return 0;
}

void
fn2 ()
{
    b = (c && a) > fn1 (c) >= c;
}

int
main ()
{
    return 0;
}


[regehr@dyson r14]$ current-gcc -v
Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r186233-install/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.8.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --with-libelf=/usr/local --enable-lto
--prefix=/home/regehr/z/compiler-install/gcc-r186233-install
--program-prefix=r186233- --enable-languages=c,c++
Thread model: posix
gcc version 4.8.0 20120409 (experimental) (GCC)

[Bug tree-optimization/52912] [4.8 Regression] ICE: verify_ssa failed

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52912

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2012-04-10
          Component|c                           |tree-optimization
         AssignedTo|unassigned at gcc dot       |rguenth at gcc dot gnu.org
                   |gnu.org                     |
   Target Milestone|---                         |4.8.0
            Summary|ICE: verify_ssa failed      |[4.8 Regression] ICE:
                   |                            |verify_ssa failed
     Ever Confirmed|0                           |1

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-04-10 12:23:14 UTC ---
Confirmed, mine.  Possibly a dup of 52886.

[Bug tree-optimization/52912] [4.8 Regression] ICE: verify_ssa failed

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52912

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-04-11 08:12:38 UTC ---
Author: rguenth
Date: Wed Apr 11 08:12:33 2012
New Revision: 186303

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=186303
Log:
2012-04-11  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/52912
    * tree-ssa-threadupdate.c (thread_block): Tell the cfg
    manipulation code we are threading through a loop header
    to an exit destination.

    * gcc.dg/torture/pr52912.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr52912.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-threadupdate.c

[Bug tree-optimization/52912] [4.8 Regression] ICE: verify_ssa failed

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52912

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

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

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-04-11 08:16:12 UTC ---
Fixed.