[Bug c/47139] New: ice in process_use, at tree-vect-stmts.c:290

["regehr at cs dot utah.edu" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47139

           Summary: ice in process_use, at tree-vect-stmts.c:290
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: regehr@cs.utah.edu
                CC: chenyang@cs.utah.edu


[regehr@gamow tmp433]$ current-gcc -O3 small.c -c

small.c: In function 'func_1':
small.c:19:1: internal compiler error: in process_use, at tree-vect-stmts.c:290
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

[regehr@gamow tmp433]$ current-gcc -v

Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r168380-install/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --with-libelf=/usr/local --enable-lto
--prefix=/home/regehr/z/compiler-install/gcc-r168380-install
--program-prefix=r168380- --enable-languages=c,c++
Thread model: posix
gcc version 4.6.0 20101231 (experimental) (GCC) 

[regehr@gamow tmp433]$ cat small.c

typedef signed char int8_t;
typedef int int32_t;
typedef unsigned char uint8_t;
typedef unsigned short int uint16_t;
typedef unsigned int uint32_t;
static uint8_t
safe_add_func_uint32_t_u_u (uint32_t ui1, uint8_t ui2)
{
  return ui1 + ui2;
}

int32_t g_10;
int32_t *g_23 = &g_10;
int32_t **const volatile g = &g_23;
int32_t g_42;
int32_t *func_68 (uint16_t p_69, int8_t p_70);

uint8_t
func_1 (void)
{
  *g = func_68 (0x837BL, 0);
  return 0;
}

int32_t *
func_68 (uint16_t p_69, int8_t p_70)
{
  int32_t l_113;
  for (p_70 = 1; p_70; p_70 = safe_add_func_uint32_t_u_u (p_70, 1))
    {
      int32_t *l_118 = &g_42;
      *l_118 = l_113;
      l_113 |= p_70;
    }
  return 0;
}

int
main (int argc, char *argv[])
{
  func_1 ();
  return 0;
}