[Bug rtl-optimization/65693] [5.0 Regression] ICE in assign_by_spills, at lra-assigns.c:1419

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65693

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-04-08
                 CC|                            |trippels at gcc dot gnu.org,
                   |                            |vmakarov at gcc dot gnu.org
          Component|c++                         |rtl-optimization
   Target Milestone|---                         |5.0
     Ever confirmed|0                           |1

--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
markus@x4 tmp % cat t.ii
int a;
unsigned b;
void
VBoxNsxpXPTC_InvokeByIndex ()
{
  unsigned long *c = (unsigned long *) __builtin_alloca (b);
  a = *c;
  register int d asm("rdx")
      = ((int (*) (int, int, int, int, int, int)) 0)(0, 0, d, 0, 0, 0);
}

markus@x4 tmp % g++ -c t.ii
t.ii: In function ‘void VBoxNsxpXPTC_InvokeByIndex()’:
t.ii:10:1: error: unable to find a register to spill
 }
 ^
t.ii:10:1: error: this is the insn:
(insn 10 37 11 2 (parallel [
            (set (reg:DI 97)
                (udiv:DI (reg:DI 95)
                    (reg:DI 107)))
            (set (reg:DI 108 [98])
                (umod:DI (reg:DI 95)
                    (reg:DI 107)))
            (clobber (reg:CC 17 flags))
        ]) t.ii:6 352 {*udivmoddi4}
     (expr_list:REG_UNUSED (reg:DI 108 [98])
        (expr_list:REG_DEAD (reg:DI 107)
            (expr_list:REG_DEAD (reg:DI 95)
                (expr_list:REG_UNUSED (reg:CC 17 flags)
                    (nil))))))
t.ii:10: confused by earlier errors, bailing out