[Bug target/51659] ICE in function output_move_double

["carrot at google dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51659

--- Comment #1 from Carrot <carrot at google dot com> 2011-12-23 02:29:49 UTC ---
(gdb) cont
Continuing.

Breakpoint 2, output_move_double (operands=0x19be680, emit=1 '\001', count=0x0)
at ../../../trunk/gcc/config/arm/arm.c:13933
13933          gcc_assert (!emit);
(gdb) print debug_rtx(operands[0])
(reg:DI 2 r2 [orig:139 f_1(D)->x_frame_offset ] [139])
$1 = void
(gdb) print debug_rtx(operands[1])
(reg:SI 3 r3)
$2 = void

(gdb) bt
#0  output_move_double (operands=0x19be680, emit=1 '\001', count=0x0) at
../../../trunk/gcc/config/arm/arm.c:13933
#1  0x0000000000fdb969 in output_642 (operands=0x19be680, insn=0x7ffff643d900)
at ../../../trunk/gcc/config/arm/vfp.md:202
#2  0x000000000079d73b in get_insn_template (code=642, insn=0x7ffff643d900) at
../../../trunk/gcc/final.c:1817
#3  0x000000000079f2ed in final_scan_insn (insn=0x7ffff643d900, file=0x1a451a0,
optimize_p=2, nopeepholes=0, seen=0x7fffffffe208) at
../../../trunk/gcc/final.c:2682
#4  0x000000000079d5d9 in final (first=0x7ffff6ae6940, file=0x1a451a0,
optimize_p=2) at ../../../trunk/gcc/final.c:1786
#5  0x00000000007a2280 in rest_of_handle_final () at
../../../trunk/gcc/final.c:4319
#6  0x0000000000a1f9ae in execute_one_pass (pass=0x1865060) at
../../../trunk/gcc/passes.c:2080
#7  0x0000000000a1fb9c in execute_pass_list (pass=0x1865060) at
../../../trunk/gcc/passes.c:2135
#8  0x0000000000a1fbbd in execute_pass_list (pass=0x1865ea0) at
../../../trunk/gcc/passes.c:2136
#9  0x0000000000a1fbbd in execute_pass_list (pass=0x1865e40) at
../../../trunk/gcc/passes.c:2136
#10 0x0000000000bc3b26 in tree_rest_of_compilation (fndecl=0x7ffff6c44a00) at
../../../trunk/gcc/tree-optimize.c:421
#11 0x0000000000699e81 in cgraph_expand_function (node=0x7ffff6937360) at
../../../trunk/gcc/cgraphunit.c:1818
#12 0x000000000069a04c in cgraph_expand_all_functions () at
../../../trunk/gcc/cgraphunit.c:1885
#13 0x000000000069ab8d in cgraph_optimize () at
../../../trunk/gcc/cgraphunit.c:2198
#14 0x0000000000697bce in cgraph_finalize_compilation_unit () at
../../../trunk/gcc/cgraphunit.c:1327
#15 0x00000000004c8b3c in c_write_global_declarations () at
../../../trunk/gcc/c-decl.c:10026
#16 0x0000000000b11a52 in compile_file () at ../../../trunk/gcc/toplev.c:573
#17 0x0000000000b13c8b in do_compile () at ../../../trunk/gcc/toplev.c:1935
#18 0x0000000000b13e02 in toplev_main (argc=20, argv=0x7fffffffe658) at
../../../trunk/gcc/toplev.c:2011
#19 0x00000000005c9d90 in main (argc=20, argv=0x7fffffffe658) at
../../../trunk/gcc/main.c:36
(gdb) f 3
#3  0x000000000079f2ed in final_scan_insn (insn=0x7ffff643d900, file=0x1a451a0,
optimize_p=2, nopeepholes=0, seen=0x7fffffffe208) at
../../../trunk/gcc/final.c:2682
2682        templ = get_insn_template (insn_code_number, insn);
(gdb) print debug_rtx(insn)
(insn:TI 6 3 7 2 (set (reg:DI 2 r2 [orig:139 f_1(D)->x_frame_offset ] [139])
        (mem/s:DI (plus:SI (reg:SI 0 r0 [ f ])
                (const_int 152 [0x98])) [6 f_1(D)->x_frame_offset+0 S8 A64]))
src/function.c:512 642 {*movdi_vfp_cortexa8}
     (expr_list:REG_DEAD (reg:SI 0 r0 [ f ])
        (nil)))
$3 = void

Apparently operands[1] doesn't match the actual operand (MEM ...) in the insn.


(gdb) print recog_data.operand
$6 = {0x7ffff5ff7100, 0x7ffff5ff77a0, 0xabababababababab <repeats 28 times>}
(gdb) print recog_data.operand[0]
$7 = (rtx) 0x7ffff5ff7100
(gdb) print recog_data.operand[1]
$8 = (rtx) 0x7ffff5ff77a0
(gdb) print debug_rtx(recog_data.operand[0])
(reg:DI 2 r2 [orig:139 f_1(D)->x_frame_offset ] [139])
$9 = void
(gdb) print debug_rtx(recog_data.operand[1])
(reg:SI 3 r3)

For some unknown reason, recog_data.operand[1] is corrupted.