[Bug c/44030] New: error: SSA name in freelist but still referenced

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

[regehr@bethe tmp601]$ current-gcc -v
Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r159144-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-r159144-install
--program-prefix=r159144- --enable-languages=c,c++
Thread model: posix
gcc version 4.6.0 20100507 (experimental) (GCC) 

[regehr@bethe tmp601]$ current-gcc -O2 -c small.c

small.c: In function 'func':
small.c:14:1: error: SSA name in freelist but still referenced
pretmp.6_10
small.c:24:7: note: in statement
g_54.1_5 = pretmp.6_10;

small.c:14:1: 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@bethe tmp601]$ cat small.c

typedef int int32_t;
typedef unsigned int uint32_t;
static uint32_t
safe_sub_func_uint32_t_u_u (uint32_t ui1, uint32_t ui2)
{
  return ui1 - ui2;
}

int32_t l_105[7];

int32_t g_4;
int32_t *g_54 = &g_4;
int32_t *
func (int32_t p_73, int32_t * p_74, int32_t p_75, int32_t * *p_76,
      int32_t * *p_77)
{
lbl_110:for (g_4 = 0; g_4; g_4 = 1)
    {
    }
  for (p_75 = -28; p_75; p_75 = safe_sub_func_uint32_t_u_u (p_75, 1))
    {
      if (g_4)
        goto lbl_110;
      *g_54 = 0;
    }
  return &l_105[5];
}


-- 
           Summary: error: SSA name in freelist but still referenced
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: regehr at cs dot utah dot edu
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44030