[Bug target/50092] [4.4/4.5/4.6/4.7 Regression] internal compiler error: in elimination_costs_in_insn, at reload1.c:3633

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50092

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011-08-16
      Known to work|                            |4.3.6
   Target Milestone|---                         |4.4.7
            Summary|internal compiler error: in |[4.4/4.5/4.6/4.7
                   |elimination_costs_in_insn,  |Regression] internal
                   |at reload1.c:3633           |compiler error: in
                   |                            |elimination_costs_in_insn,
                   |                            |at reload1.c:3633
     Ever Confirmed|0                           |1
      Known to fail|                            |4.4.6, 4.5.3, 4.6.1

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-08-16 
08:42:04 UTC ---
Confirmed.  Reduced testcase:

int main(int argc, char **argv) 
{
  int i;
  _Complex long double vector[100000000];
  for (i=0 ; i<10 ; i++)
    printf("Valor: %Lf\n", (long double) rand()/ 2147483648.0);
  printf ("La posicion 5 tiene el valor: %Le\n", (long double) vector[5]);
} 


ICEs in various ways depending on optimization level.  With -m32 the
array is diagnosed as being too large.  At -O1:

t.3.i: In function 'main':
t.3.i:6:5: warning: incompatible implicit declaration of built-in function
'printf' [enabled by default]
t.3.i:8:1: error: unrecognizable insn:
(insn 46 15 18 3 (parallel [
            (set (reg:XF 71)
                (float:XF (reg:SI 63 [ D.2730 ])))
            (clobber (mem/c:SI (plus:DI (reg/f:DI 20 frame)
                        (const_int -3200000004 [0xffffffff4143dffc])) [0 S4
A32]))
        ]) t.3.i:6 -1
     (nil))
t.3.i:8:1: internal compiler error: in extract_insn, at recog.c:2115
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

4.3 is happy with the code.