[Bug tree-optimization/36116] New: ICE with -O2 -ftree-loop-distribution -funsafe-loop-optimizations -m32

[Bug tree-optimization/36116] New: ICE with -O2 -ftree-loop-distribution -funsafe-loop-optimizations -m32

[martin dot drab at fjfi dot cvut dot cz]

When the attached example is compiled by the
   gcc version 4.4.0 20080430 (experimental) (GCC)
using
------------
   gcc -O2 -ftree-loop-distribution -funsafe-loop-optimizations -m32 -c
png2theora.c.c -o x.o
------------
it produces the following error:

----------------
png2theora.c: In function 'main':
png2theora.c:405: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
----------------


-- 
           Summary: ICE with -O2 -ftree-loop-distribution -funsafe-loop-
                    optimizations -m32
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: martin dot drab at fjfi dot cvut dot cz
 GCC build triplet: x86_64-pc-linux-gnu
  GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36116

[Bug tree-optimization/36116] ICE with -O2 -ftree-loop-distribution -funsafe-loop-optimizations -m32

[martin dot drab at fjfi dot cvut dot cz]

------- Comment #1 from martin dot drab at fjfi dot cvut dot cz  2008-05-03 02:27 -------
Created an attachment (id=15565)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15565&action=view)
Triggers the bug


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36116

[Bug tree-optimization/36116] ICE with -O2 -ftree-loop-distribution -funsafe-loop-optimizations -m32

[reichelt at gcc dot gnu dot org]

------- Comment #2 from reichelt at gcc dot gnu dot org  2008-12-29 03:22 -------
Instead of a segfault I see a crash in fold_binary, at fold-const.c:9278

Reduced testcase that crashes already with "-O -ftree-loop-distribution":

==========================================
extern void *malloc (__SIZE_TYPE__ n);

void foo()
{
  char *p, *q;
  int i;

  p = malloc(8);
  q = malloc(8);

  for (i = 0; i < 8; i += 2)
  {
    p[i >> 1] = 0;
    q[i >> 1] = 0;
  }
}
==========================================

Apparently this has been fixed with the patch for PR38250.


*** This bug has been marked as a duplicate of 38250 ***


-- 

reichelt at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36116