[Bug target/78458] [7 Regression] LRA ICE building libgcc for powerpc-linux-gnuspe e500v2

[bergner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78458

Peter Bergner <bergner at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-11-22
                 CC|                            |bergner at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #4 from Peter Bergner <bergner at gcc dot gnu.org> ---
Confirmed with the following creduced test case:

bergner@genoa:~/gcc/BUGS/GNU_SPE$ cat pr78458.i 
long double a, f, g, h, i;
long double b, c, d, k;
_Complex
foo (long double p1)
{
  _Complex e;
  a = k * h;
  b = p1 * g;
  if (__builtin_expect(c, 0)
      && __builtin_expect(d, 0))
    {
      long double j = __builtin_expect(k, 0);
      if (__builtin_expect(j, 0))
        p1 = __builtin_copysignl(1, p1);
      a = b = b - i;
      if (f)
        d = h + p1 * g;
    }
  e = c;
  __imag__ e = d;
  return e;
}
bergner@genoa:~/gcc/BUGS/GNU_SPE$
/home/bergner/gcc/build/gcc-fsf-mainline-gnuspe/gcc/xgcc
-B/home/bergner/gcc/build/gcc-fsf-mainline-gnuspe/gcc -O2 -mcpu=8548 -S
pr78458.i 
pr78458.i: In function ‘foo’:
pr78458.i:22:1: internal compiler error: in lra_set_insn_recog_data, at
lra.c:965
 }
 ^
0x10a7d327 lra_set_insn_recog_data(rtx_insn*)
        /home/bergner/gcc/gcc-fsf-mainline-reg-move_costs-base/gcc/lra.c:963
0x10a7a177 lra_get_insn_recog_data
       
/home/bergner/gcc/gcc-fsf-mainline-reg-move_costs-base/gcc/lra-int.h:487
0x10a7fc8f lra_update_insn_regno_info(rtx_insn*)
        /home/bergner/gcc/gcc-fsf-mainline-reg-move_costs-base/gcc/lra.c:1585
0x10a806af lra_push_insn_1
        /home/bergner/gcc/gcc-fsf-mainline-reg-move_costs-base/gcc/lra.c:1736
0x10a80713 lra_push_insn(rtx_insn*)
        /home/bergner/gcc/gcc-fsf-mainline-reg-move_costs-base/gcc/lra.c:1744
0x10a80973 push_insns
        /home/bergner/gcc/gcc-fsf-mainline-reg-move_costs-base/gcc/lra.c:1787
0x10a80ca7 lra_process_new_insns(rtx_insn*, rtx_insn*, rtx_insn*, char const*)
        /home/bergner/gcc/gcc-fsf-mainline-reg-move_costs-base/gcc/lra.c:1835
0x10aa6f5f split_reg
       
/home/bergner/gcc/gcc-fsf-mainline-reg-move_costs-base/gcc/lra-constraints.c:5369
0x10aab417 inherit_in_ebb
       
/home/bergner/gcc/gcc-fsf-mainline-reg-move_costs-base/gcc/lra-constraints.c:6178
0x10aab8d3 lra_inheritance()
       
/home/bergner/gcc/gcc-fsf-mainline-reg-move_costs-base/gcc/lra-constraints.c:6248
0x10a82cf3 lra(_IO_FILE*)
        /home/bergner/gcc/gcc-fsf-mainline-reg-move_costs-base/gcc/lra.c:2403
0x109fe61f do_reload
        /home/bergner/gcc/gcc-fsf-mainline-reg-move_costs-base/gcc/ira.c:5381
0x109fee53 execute
        /home/bergner/gcc/gcc-fsf-mainline-reg-move_costs-base/gcc/ira.c:5565