[PATCH] add VRP for bitwise OR and AND: v3

Denis Vlasenko vda.linux@googlemail.com
Sat Aug 12 13:42:00 GMT 2006


* tree-vrp.c (extract_range_from_binary_expr):
  add value range propagation for bitwise AND/OR

Patch is against gcc-4.2-20060805.
Since unmodified gcc-4.2-20060805 snapshot does not bootstrap
for me, I only verified that "make all-gcc" build
of gcc-4.2-20060805 on i386-pc-linux-gnu
with this patch succeeds.

However, I successfully bootstrapped gcc-4.1.1 with this patch.
--
vda
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