Right, instcombine cannot remove ((X >> C) << C) if it's signed.
-rw-r--r-- 55 .cvsignore
-rw-r--r-- 1147 LICENSE.TXT
-rw-r--r-- 383 Makefile
-rw-r--r-- 28379 Makefile.common
-rw-r--r-- 4272 Makefile.config.in
-rw-r--r-- 28379 Makefile.rules
drwxr-xr-x - autoconf
-rwxr-xr-x 723173 configure
drwxr-xr-x - docs
drwxr-xr-x - include
drwxr-xr-x - lib
drwxr-xr-x - projects
drwxr-xr-x - runtime
drwxr-xr-x - support
drwxr-xr-x - test
drwxr-xr-x - tools
drwxr-xr-x - utils