[Bug middle-end/26049] New: ICE compiling glibc part using -O1 -m64 -mlong-double-128

[bergner at vnet dot ibm dot com]

I get an ICE compiling the following test case using a 3.4 compiler (checked
out and built today [2006/01/31]).

bergner@vervain:~> cat _IO_vfprintf_internal.i

union printf_arg {
  long double pa_long_double;
  const char *pa_string;
  const int *pa_wstring;
  void *pa_pointer;
};

struct _IO_FILE {
  int _flags2;
};

void
_IO_vfprintf_internal(struct _IO_FILE *s, const char *format, __builtin_va_list
ap)
{
  const char *f;
  __builtin_va_list ap_save;
  long unsigned int nargs = 0;
  int *args_type;
  union printf_arg *args_value;
  long unsigned int cnt;

  __builtin_va_copy(ap_save, ap);

  for (f = format; *f; f++) {
    nargs += 1;
  }

  args_value = __builtin_alloca(nargs * sizeof (union printf_arg));

  for (cnt = 0; cnt < nargs; ++cnt)
    switch (args_type[cnt]) {
    case 0:
            args_value[cnt].pa_string =
                __builtin_va_arg(ap_save, const char *);
            break;
    case 1:
            args_value[cnt].pa_wstring =
                __builtin_va_arg(ap_save, const int *);
            break;
    case 2:
            args_value[cnt].pa_pointer =
                __builtin_va_arg(ap_save, void *);
            break;
    default:
            if ((args_type[cnt] & (1 << 11)) != 0)
                    args_value[cnt].pa_pointer =
                        __builtin_va_arg(ap_save, void *);
            else
                    args_value[cnt].pa_long_double = 0.0;
            break;
    case -1:
            ((void) ((s->_flags2 & 4) ? 0
              : (__assert_fail ("s", "v", 1743, __PRETTY_FUNCTION__), 0)));
            __libc_fatal ("*** invalid %N$ use detected ***\n");
    }
}

bergner@vervain:~> ./gcc/gcc-20060131-3_4-biarch/bin/gcc -O1 -c -m64
-mlong-double-128 _IO_vfprintf_internal.i
_IO_vfprintf_internal.i: In function `_IO_vfprintf_internal':
_IO_vfprintf_internal.i:57: error: insn does not satisfy its constraints:
(insn 280 157 159 15 _IO_vfprintf_internal.i:50 (set (mem/s/j:TF (plus:DI
(reg:DI 0 0 [194])
                (reg/v/f:DI 29 29 [orig:126 args_value ] [126])) [0
<variable>.pa_long_double+0 S16 A128])
        (reg:TF 32 0)) 312 {*movtf_internal} (nil)
    (nil))
_IO_vfprintf_internal.i:57: internal compiler error: in
reload_cse_simplify_operands, at postreload.c:391
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

bergner@vervain:~> ./gcc/gcc-20060131-3_4-biarch/bin/gcc -v
Reading specs from
/home/bergner/gcc/gcc-20060131-3_4-biarch/lib/gcc/powerpc-linux/3.4.6/specs
Configured with: /home/bergner/gcc/gcc-20060131-3_4/configure
--target=powerpc-linux --host=powerpc-linux --build=powerpc-linux
--enable-targets=powerpc64-linux --enable-threads=posix --enable-shared
--enable-__cxa_atexit --enable-languages=c,c++ --disable-checking
--prefix=/home/bergner/gcc/gcc-20060131-3_4-biarch
Thread model: posix
gcc version 3.4.6 20060131 (prerelease)


-- 
           Summary: ICE compiling glibc part using -O1 -m64 -mlong-double-
                    128
           Product: gcc
           Version: 3.4.6
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bergner at vnet dot ibm dot com
 GCC build triplet: powerpc-linux
  GCC host triplet: powerpc-linux
GCC target triplet: powerpc-linux --enable-targets=powerpc64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26049