[Bug rtl-optimization/49230] please provide workaround for setjmp/longjmp in mingw32

["jojelino at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49230

--- Comment #4 from gee <jojelino at gmail dot com> 2011-06-29 18:03:24 UTC ---
Created attachment 24637
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24637
generated asm with i686-pc-mingw32-gcc testsetjmp.c -S -s

> I compiled program with 4.6.0 gcc using mingw-w64 as runtime, and I get a crash
yes this testcase crashes at epilogue of main if gcc doesn't do anything
but in latest gcc trunk, it doesn't work as expected. 
sorry. i forgot to say gcc version
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/i686-pc-cygwin/4.7.0/lto-wrapper.exe
Target: i686-pc-cygwin
Configured with: ./configure --config-cache --prefix=/usr
--disable-win32-registry --enable-threads=win32 --enable-languages=c,c++,lto
--with-win32-nlsapi=unicode --enable-tls --disable-bootstrap --enable-shared
--disable-sjlj-exceptions --enable-gomp
Thread model: win32
gcc version 4.7.0 20110622 (experimental) (GCC)
and i attached asm code latest gcc trunk generated
i used i686-pc-mingw32-gcc testsetjmp.c -S -s to generate .s file.
 . please ld using attached asm file.
and i expect you and i get same result.
D:\cygwin\tmp>i686-pc-mingw32-gcc testsetjmp.s

D:\cygwin\tmp>a
start
foobar 10
foobar 9
foobar 8
foobar 7
foobar 6
foobar 5
foobar 4
foobar 3
foobar 2
foobar 1
foobar 0
(jit debugger message dialog shows)