[Bug other/50925] [4.7 Regression][avr] ICE at spill_failure, at reload1.c:2118

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50925

--- Comment #19 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-02-27 
20:42:39 UTC ---
Created attachment 26765
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26765
spill.c - another reduced test

Here is yet another different and simplified test case.

With that test case I can produce spill fails for 4.5.2, 4.6.2 and 4.7 trunk
(build from around 2012-02-17).

>> avr-gcc spill.c -Os -S

spill.c: In function 'menu_cycle':
spill.c:31:1: error: unable to find a register to spill in class 'POINTER_REGS'
spill.c:31:1: error: this is the insn:
(insn 36 20 21 2 (set (reg:QI 18 r18)
        (mem/c:QI (plus:HI (reg/f:HI 28 r28)
                (const_int 1 [0x1])) [3 S1 A8])) spill.c:29 18 {movqi_insn}
     (nil))
spill.c:31:1: internal compiler error: in spill_failure, at reload1.c:2120