--- Comment #9 from nospamname at web dot de 2009-12-31 13:35 ---
I compile now with a m68k-elf Compiler and do the small testcode i post
above.The Problem is same on m68k-elf Compiler too.
other CPU as -m68000 fail with -O3 or -O2
So can this Report Reopen and maybe another can check
--- Comment #10 from mikpe at it dot uu dot se 2009-12-31 17:01 ---
Created an attachment (id=19431)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19431action=view)
simpler test case
I'm attaching a reduced test case that triggers wrong-code for m68k-elf with
gcc-4.5-20091224,
--- Comment #7 from schwab at linux-m68k dot org 2009-12-29 11:58 ---
Please report that to the provider of your inofficial builds. Neither
m68k-amigaos nor m68k-atari-mint are supported by the official sources.
--
schwab at linux-m68k dot org changed:
What|Removed
--- Comment #8 from nospamname at web dot de 2009-12-29 18:52 ---
I have now find out with cflag -m68000 work with -O3.
But it work not with -m68020 or -m68040 or -m68060
Here is a standalone testcode and output with -S
-
struct test{
long dummy;
unsigned long buf;
};
struct
--- Comment #1 from ami_stuff at o2 dot pl 2009-12-28 20:17 ---
Created an attachment (id=19401)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19401action=view)
preprocessed files + asm output
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42522
--- Comment #3 from ami_stuff at o2 dot pl 2009-12-28 20:38 ---
No, asm code looks the same like with -O2 option:
_flv_probe:
clr.l d0
rts
.even
Here are GCC's options which I used (should be included in the first post):
$ make_68k_v45
--- Comment #4 from schwab at linux-m68k dot org 2009-12-28 23:30 ---
Works for me with 4.5.0 20091228.
--
schwab at linux-m68k dot org changed:
What|Removed |Added
--- Comment #5 from ami_stuff at o2 dot pl 2009-12-28 23:38 ---
I found which optimization doesn't work correctly on my config:
-O2 (Unknown format):
_flv_probe:
clr.l d0
rts
.even
-O2 -fno-cse-follow-jumps (works OK):
_flv_probe:
move.l 4(sp),a0
--- Comment #6 from ami_stuff at o2 dot pl 2009-12-29 01:20 ---
Works for me with 4.5.0 20091228.
How's that possible? What about GCC 4.4 branch? I just checked with ATARI GCC
4.4.2 m68k compiler and got the same result:
/usr/local/cross-mint/bin/m68k-atari-mint-gcc -c -S flvdec_O2.i
