Cleaning up expand optabs code

[Georg-Johann Lay]

Georg-Johann Lay schrieb:
> Andreas Krebbel schrieb:
>> On 03/22/2011 06:48 PM, Richard Henderson wrote:
>>
>>> Ok.  Watch out for other target problems this week.
> 
> libgcc fails to build for avr (SVN 171446)
> 
> ../../../../../gcc.gnu.org/trunk/libgcc/../gcc/libgcc2.c: In function
> '__negdi2':
> ../../../../../gcc.gnu.org/trunk/libgcc/../gcc/libgcc2.c:68:17:
> internal compiler error: in maybe_gen_insn, at  optabs.c:7123

p.s.: some additional info

(gdb) set args -quiet -v -iprefix
/local/gnu/build/gcc-4.6-avr/gcc/../lib/gcc/avr/4.7.0/ -isystem
/mnt/nfs/home/georg/gnu/build/gcc-4.6-avr/gcc/include -isystem
/mnt/nfs/home/georg/gnu/build/gcc-4.6-avr/gcc/include-fixed
libgcc2-negdi2.c -quiet -dumpbase libgcc2-negdi2.c -auxbase
libgcc2-negdi2 -Os -version -o libgcc2-negdi2.s
(gdb) cd ~/test
(gdb) r
GNU C (GCC) version 4.7.0 20110325 (experimental) (avr)
	compiled by GNU C version 4.3.2 [gcc-4_3-branch revision 141291], GMP
version 5.0.1, MPFR version 3.0.0-p8, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096

Breakpoint 1, fancy_abort (file=0x87ee230
"../../../gcc.gnu.org/trunk/gcc/optabs.c", line=7123,
function=0x87ee585 "maybe_gen_insn") at
../../../gcc.gnu.org/trunk/gcc/diagnostic.c:893
(gdb) bt
#0  fancy_abort (file=0x87ee230
"../../../gcc.gnu.org/trunk/gcc/optabs.c", line=7123,
function=0x87ee585 "maybe_gen_insn") at
../../../gcc.gnu.org/trunk/gcc/diagnostic.c:893
#1  0x0837a86a in maybe_gen_insn (icode=CODE_FOR_setmemhi, nops=6,
ops=0xbfffdfcc) at ../../../gcc.gnu.org/trunk/gcc/optabs.c:7123
#2  0x0837a91f in maybe_expand_insn (icode=CODE_FOR_setmemhi, nops=6,
ops=0xbfffdfcc) at ../../../gcc.gnu.org/trunk/gcc/optabs.c:7155
#3  0x08241122 in set_storage_via_setmem (object=0xb7dfcc60,
size=0xb7d682f8, val=0xb7d682b8, align=<value optimized out>,
expected_align=<value optimized out>, expected_size=-1) at
../../../gcc.gnu.org/trunk/gcc/expr.c:2730
#4  0x082567d5 in clear_storage_hints (object=0xb7dfcc60,
size=0xb7d682f8, method=BLOCK_OP_NORMAL, expected_align=0,
expected_size=-1) at ../../../gcc.gnu.org/trunk/gcc/expr.c:2575
#5  0x0825691f in clear_storage (object=0xb7dfcc60, size=0xb7d682f8,
method=BLOCK_OP_NORMAL) at ../../../gcc.gnu.org/trunk/gcc/expr.c:2590
#6  0x0825aa83 in store_constructor (exp=0xb7dfaca8,
target=0xb7dfcc60, cleared=0, size=8) at
../../../gcc.gnu.org/trunk/gcc/expr.c:5188
#7  0x0825b6fe in expand_constructor (exp=0xb7dfaca8,
target=0xb7dfcc60, modifier=EXPAND_NORMAL, avoid_temp_mem=0 '\0') at
../../../gcc.gnu.org/trunk/gcc/expr.c:7092
#8  0x0824dade in expand_expr_real_1 (exp=0xb7dfaca8,
target=0xb7dfcc60, tmode=BLKmode, modifier=EXPAND_NORMAL,
alt_rtl=0xbfffe35c) at ../../../gcc.gnu.org/trunk/gcc/expr.c:8655
#9  0x08245d52 in store_expr (exp=0xb7dfaca8, target=0xb7dfcc60,
call_param_p=0, nontemporal=0 '\0') at
../../../gcc.gnu.org/trunk/gcc/expr.c:4645
#10 0x08257949 in expand_assignment (to=0xb7e2a1e0, from=0xb7dfaca8,
nontemporal=5 '\005') at ../../../gcc.gnu.org/trunk/gcc/expr.c:4433
#11 0x081a61aa in expand_gimple_stmt (stmt=0xb7e237e0) at
../../../gcc.gnu.org/trunk/gcc/cfgexpand.c:1971
#12 0x081a7200 in expand_gimple_basic_block (bb=0xb7ddf3c0) at
../../../gcc.gnu.org/trunk/gcc/cfgexpand.c:3645
#13 0x081a8a65 in gimple_expand_cfg () at
../../../gcc.gnu.org/trunk/gcc/cfgexpand.c:4128
#14 0x08395334 in execute_one_pass (pass=0x88742e0) at
../../../gcc.gnu.org/trunk/gcc/passes.c:1554
#15 0x0839562d in execute_pass_list (pass=0x88742e0) at
../../../gcc.gnu.org/trunk/gcc/passes.c:1609
#16 0x08475baa in tree_rest_of_compilation (fndecl=0xb7e21180) at
../../../gcc.gnu.org/trunk/gcc/tree-optimize.c:422
#17 0x08615bc6 in cgraph_expand_function (node=0xb7e2c000) at
../../../gcc.gnu.org/trunk/gcc/cgraphunit.c:1576
#18 0x08618c59 in cgraph_optimize () at
../../../gcc.gnu.org/trunk/gcc/cgraphunit.c:1635
#19 0x0861915d in cgraph_finalize_compilation_unit () at
../../../gcc.gnu.org/trunk/gcc/cgraphunit.c:1096
#20 0x080b6590 in c_write_global_declarations () at
../../../gcc.gnu.org/trunk/gcc/c-decl.c:9879
#21 0x08411fae in toplev_main (argc=19, argv=0xbfffe874) at
../../../gcc.gnu.org/trunk/gcc/toplev.c:591
#22 0x08152372 in main (argc=Cannot access memory at address 0x1
) at ../../../gcc.gnu.org/trunk/gcc/main.c:36
(gdb) frame 1
#1  0x0837a86a in maybe_gen_insn (icode=CODE_FOR_setmemhi, nops=6,
ops=0xbfffdfcc) at ../../../gcc.gnu.org/trunk/gcc/optabs.c:7123
(gdb) p nops
$1 = 6
(gdb) p insn_data[(int) icode].n_operands
$2 = 5 '\005'
(gdb) p *ops
$3 = {type = EXPAND_FIXED, unsigned_p = 0, unused = 0, mode =
VOIDmode, value = 0xb7dfcc60}
(gdb) p ops -> value
$4 = (rtx) 0xb7dfcc60
(gdb) pr
(mem/s/c:BLK (reg/f:HI 37 virtual-stack-vars) [2 w+0 S8 A8])
(gdb) p icode
$5 = CODE_FOR_setmemhi
(gdb) Quit
(gdb)