[Bug rtl-optimization/55396] -O2 -m32 -fno-omit-frame-pointer: internal compiler error: in check_rtl, at lra.c:2007

["markus at trippelsdorf dot de" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55396

Markus Trippelsdorf <markus at trippelsdorf dot de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |markus at trippelsdorf dot
                   |                            |de

--- Comment #1 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-11-20 08:43:17 UTC ---
markus@x4 /tmp % cat test.i
int a[0];
struct thread_struct
{
    int sp;
    int ip;
}
;
struct task_struct
{
    struct thread_struct thread;
    struct task_struct *curr;
}
b, h, *l;
int c, d, e, f, g, m;
void
fn1 ()
{
    struct task_struct *i;
    int *j;
    int k;
need_resched:
    k = 0;
    h = *(typeof (&b)) a[k];
    j = 0;
    i = 0;
    ++*j;
    struct task_struct *n = i;
    asm ("popl %%ebp\n\t" : "=c" (d), "=d" (e), "=S" (f),
         "=D" (g):[next_sp] "mm" (n->thread.ip), [prev] "ad" (0));
    goto need_resched;
}

markus@x4 /tmp % gcc -O2 -c -m32 -fno-omit-frame-pointer test.i
test.i: In function ‘fn1’:
test.i:31:1: error: unrecognizable insn:
 }
 ^
(insn 25 47 26 3 (parallel [
            (set (reg:SI 2 cx [77])
                (asm_operands:SI ("popl %%ebp
        ") ("=c") 0 [
                        (mem:SI (plus:SI (reg:SI 2 cx [88])
                                (const_int 4 [0x4])) [2 MEM[(struct task_struct
*)0B].thread.ip+0 S4 A32])
                        (reg:SI 2 cx [88])
                    ]
                     [
                        (asm_input:SI ("mm") (null):0)
                        (asm_input:SI ("ad") (null):0)
                    ]
                     [] test.i:28))
            (set (reg:SI 1 dx [78])
                (asm_operands:SI ("popl %%ebp
        ") ("=d") 1 [
                        (mem:SI (plus:SI (reg:SI 2 cx [88])
                                (const_int 4 [0x4])) [2 MEM[(struct task_struct
*)0B].thread.ip+0 S4 A32])
                        (reg:SI 2 cx [88])
                    ]
                     [
                        (asm_input:SI ("mm") (null):0)
                        (asm_input:SI ("ad") (null):0)
                    ]
                     [] test.i:28))
            (set (reg:SI 4 si [79])
                (asm_operands:SI ("popl %%ebp
        ") ("=S") 2 [
                        (mem:SI (plus:SI (reg:SI 2 cx [88])
                                (const_int 4 [0x4])) [2 MEM[(struct task_struct
*)0B].thread.ip+0 S4 A32])
                        (reg:SI 2 cx [88])
                    ]
                     [
                        (asm_input:SI ("mm") (null):0)
                        (asm_input:SI ("ad") (null):0)
                    ]
                     [] test.i:28))
            (set (reg:SI 5 di [80])
                (asm_operands:SI ("popl %%ebp
        ") ("=D") 3 [
                        (mem:SI (plus:SI (reg:SI 2 cx [88])
                                (const_int 4 [0x4])) [2 MEM[(struct task_struct
*)0B].thread.ip+0 S4 A32])
                        (reg:SI 2 cx [88])
                    ]
                     [
                        (asm_input:SI ("mm") (null):0)
                        (asm_input:SI ("ad") (null):0)
                    ]
                     [] test.i:28))
            (clobber (reg:QI 18 fpsr))
            (clobber (reg:QI 17 flags))
        ]) test.i:28 -1
     (expr_list:REG_DEAD (reg:SI 2 cx [88])
        (nil)))
test.i:31:1: internal compiler error: in reload_cse_simplify_operands, at
postreload.c:413
0x780d4a _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /home/markus/gcc/gcc/rtl-error.c:110
0x780d79 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        /home/markus/gcc/gcc/rtl-error.c:118
0x73bfbb reload_cse_simplify_operands
        /home/markus/gcc/gcc/postreload.c:413
0x73d52c reload_cse_simplify
        /home/markus/gcc/gcc/postreload.c:183
0x73d52c reload_cse_regs_1
        /home/markus/gcc/gcc/postreload.c:222
0x73d98b reload_cse_regs
        /home/markus/gcc/gcc/postreload.c:70
0x73d98b rest_of_handle_postreload
        /home/markus/gcc/gcc/postreload.c:2289
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