[Bug c/49710] New: segfault

[regehr at cs dot utah.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49710

           Summary: segfault
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: reg...@cs.utah.edu


[regehr@gamow tmp037]$ current-gcc -v

Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r176182-install/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.7.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --with-libelf=/usr/local --enable-lto
--prefix=/home/regehr/z/compiler-install/gcc-r176182-install
--program-prefix=r176182- --enable-languages=c,c++
Thread model: posix
gcc version 4.7.0 20110711 (experimental) (GCC) 

[regehr@gamow tmp037]$ current-gcc -Ofast -funroll-loops small.c

small.c: In function 'func_62.constprop.0':
small.c:24:1: 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.

[regehr@gamow tmp037]$ cat small.c

int safe_62 (int ui1, int ui2)
{
  return ui1 + 1;
}

int g_3;
int g_9;
int g_21;
int g_143;

static int func_62 (int *p_66)
{
 lbl_334:
  for (g_21 = 0;;) {
      if (*p_66)
    break;
      for (; g_9;)
    for (; g_21; g_21 = 0) ;
      for (g_143 = 18; g_143 != 18; g_143 = safe_62 (g_143, 0))
    if (g_21)
      goto lbl_334;
    }
  return 0;
}

static const int *func_24 (void)
{
  func_62 (0);
  func_62 (0);
  for (;;) ;
}

int func_1 (void)
{
  for (; g_3;) return 0;
  func_24 ();
  return 0;
}

int main (void)
{
  return 0;
}