+2007-01-28 David Edelsohn <edelsohn@gnu.org>
+
+ * doc/md.texi (Standard Pattern Names): Document blockage pattern.
+
2007-01-28 Zdenek Dvorak <dvorakz@suse.cz>
* tree-ssa-loop-unswitch.c: Include tree-inline.h.
Targets that do not support write prefetches or locality hints can ignore
the values of operands 1 and 2.
+@cindex @code{blockage} instruction pattern
+@item @samp{blockage}
+
+This pattern defines a pseudo insn that prevents the instruction
+scheduler from moving instructions across the boundary defined by the
+blockage insn. Normally an UNSPEC_VOLATILE pattern.
+
@cindex @code{memory_barrier} instruction pattern
@item @samp{memory_barrier}