localopt/lower_dw opt: a==b && c==d => (a^b)|(c^d)==0
[libfirm] / ir / obstack /
drwxr-xr-x   ..
-rw-r--r-- 251 README
-rw-r--r-- 12381 obstack.c
-rw-r--r-- 1534 obstack_printf.c