[Bug middle-end/26557] [4.0/4.1/4.2 Regression] ICE in simplify_subreg

["pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #2 from pinskia at gcc dot gnu dot org  2006-03-04 15:53 -------
This is definitely a middle-end issue:
#0  fancy_abort (file=0xce9f78
"/home/pinskia/src/checkin/trunk/gcc/simplify-rtx.c", line=4402, 
    function=0xed4670 "simplify_subreg") at
/home/pinskia/src/checkin/trunk/gcc/diagnostic.c:642
#1  0x00000000009b119d in simplify_subreg (outermode=VOIDmode,
op=0x2aaaaafb1410, 
    innermode=DImode, byte=0) at
/home/pinskia/src/checkin/trunk/gcc/simplify-rtx.c:4402
#2  0x00000000009b1de3 in simplify_gen_subreg (outermode=VOIDmode,
op=0x2aaaaafb1410, 
    innermode=DImode, byte=0) at
/home/pinskia/src/checkin/trunk/gcc/simplify-rtx.c:4679
#3  0x00000000006bf81a in gen_lowpart_common (mode=VOIDmode, x=0x2aaaaafb1410)
    at /home/pinskia/src/checkin/trunk/gcc/emit-rtl.c:1158
#4  0x0000000000a366b3 in gen_lowpart_general (mode=VOIDmode, x=0x2aaaaafb1410)
    at /home/pinskia/src/checkin/trunk/gcc/rtlhooks.c:43
#5  0x00000000006ed801 in convert_modes (mode=VOIDmode, oldmode=SImode,
x=0x2aaaaafb1410, 
    unsignedp=0) at /home/pinskia/src/checkin/trunk/gcc/expr.c:822
#6  0x00000000009be5bb in emit_case_nodes (index=0x2aaaaafb1410,
node=0x2aaaab10cf90, 
    default_label=0x2aaaaafb2910, index_type=0x2aaaaafbb4d0)
    at /home/pinskia/src/checkin/trunk/gcc/stmt.c:2949
#7  0x00000000009bd129 in expand_case (exp=0x2aaaaafb24b0)
    at /home/pinskia/src/checkin/trunk/gcc/stmt.c:2509
----------
And has nothing to do with the array size not being defined at first.
Further reduced testcase:
const int struct_test[1] = {1};
void g();
void f() {
  switch(struct_test[0]) {
    case 1: g();
  }
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26557

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