[Bug target/37216] [cygming] Invalid alignment for SSE store to .comm data generated with -O3

[sherpya at netfarm dot it]

------- Comment #22 from sherpya at netfarm dot it  2008-09-29 23:17 -------
still no success while compiling ffmpeg :(

Program received signal SIGSEGV, Segmentation fault.
0x0074fe94 in ff_fft_calc_3dn ()
(gdb) bt
#0  0x0074fe94 in ff_fft_calc_3dn ()
#1  0x007506f5 in ff_fft_calc_3dn ()
#2  0x00750755 in ff_fft_calc_3dn ()
#3  0x00750a55 in ff_fft_dispatch_sse ()
#4  0x00000400 in ?? ()
#5  0x0074f718 in ff_fft_calc_sse (s=0x5b14600, z=0x5b0c5f0) at
libavcodec/i386/fft_sse.c:35
#6  0x00748080 in ff_mdct_calc (s=0x5b145f0, out=0x5b0c5f0, input=0x5b105f0) at
libavcodec/dsputil.h:673
#7  0x0064731d in encode_superframe (avctx=0x5ac4010, buf=0x5ba0030 "",
buf_size=524288, data=0x5b5cca0) at libavcodec/wmaenc.c:92
#8  0x00495b16 in avcodec_encode_audio (avctx=0x5ac4010, buf=0x5ba0030 "",
buf_size=524288, samples=0x750a50) at libavcodec/utils.c:865
#9  0x00406236 in output_packet (ist=0x5ac4390, ist_index=0,
ost_table=0x3fbfb0, nb_ostreams=1, pkt=0x22fed8) at ffmpeg.c:672
#10 0x004095d1 in av_encode (output_files=0xb6c000, nb_output_files=1,
input_files=0xb6b280, nb_input_files=1, stream_maps=0xb6c060, nb_stream_maps=0)
    at ffmpeg.c:2129
#11 0x00409878 in main (argc=Cannot access memory at address 0xa
) at ffmpeg.c:3897
(gdb) p ff_cos_16
$1 = {1, 0.923879504, 0.707106769, 0.382683426, 6.12303177e-017, 0.382683426,
0.707106769, 0.923879504}
(gdb) p &ff_cos_16

$2 = (FFTSample (*)[8]) 0xe55c94


asm code:
.lcomm _ff_cos_16,32,16

lcomm?

nm output:
$ nm ffmpeg_g.exe |grep ff_cos_16
00e55c94 B _ff_cos_16
00e185d4 B _ff_cos_16384

not aligned :(
gcc version 4.3.3 20080929 (prerelease) (Sherpya)
GNU assembler version 2.18.91 (i686-pc-mingw32) using BFD version (GNUBinutils)
2.18.91.20080917


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37216