[Bug c/48305] New: ice at -O0: verify_gimple failed

[regehr at cs dot utah.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48305

           Summary: ice at -O0: verify_gimple failed
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: reg...@cs.utah.edu
                CC: cheny...@cs.utah.edu
              Host: i686-pc-linux-gnu
            Target: i686-pc-linux-gnu
             Build: i686-pc-linux-gnu


regehr@home:~/volatile/bugs/tmp006$ current-gcc -O0 -c small.c
small.c: In function ‘func_18’:
small.c:36:15: error: type mismatch in comparison expression
unsigned int
int
unsigned int
D.1991 = D.1979 == D.1990;

small.c:36:15: internal compiler error: verify_gimple failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

regehr@home:~/volatile/bugs/tmp006$ current-gcc -v

Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/mnt/z/z/compiler-install/gcc-r171573-install/libexec/gcc/i686-pc-linux-gnu/4.7.0/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: ../configure --with-libelf=/usr/local --enable-lto
--prefix=/mnt/z/z/compiler-install/gcc-r171573-install
--program-prefix=r171573- --enable-languages=c,c++
Thread model: posix
gcc version 4.7.0 20110327 (experimental) (GCC) 

regehr@home:~/volatile/bugs/tmp006$ cat small.c


static signed char foo (signed char si1, unsigned char si2)
{
  return si2 || si1 && si2 ? : si1 + si2;
}

static unsigned char bar (unsigned ui1, unsigned char ui2)
{
  return ui1 + ui2;
}

static unsigned char baz (unsigned ui1, unsigned char ui2)
{
  return ui2 ? : ui1 + ui2;
}

struct S0
{
  unsigned char f0;
  const unsigned char f2;
  unsigned char f3;
};

struct S1
{
  const unsigned f7:54 > 1 * 8 ? : 0;
};

struct S1 g_99[9][1][5] = {
};

struct S0 g_244[10][3][1] = {
};

unsigned char func_127 (const unsigned char);

unsigned char func_18 (struct S0 p_19, unsigned char p_20)
{
  unsigned char l_605[4];
  p_20 |=
    baz (bar
     ((func_127 (0) ^ p_19.f3 > l_605[2] >= 0) ==
      (1U ^
       foo (p_19.f0,
        l_605[1]) &
       g_244[1][2][0].f2), g_244[1][2][0].f3), 1);
  return g_99[4][0][0].f7;
}