From: dje <dje@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Sun, 28 Jan 2007 19:26:43 +0000 (+0000)
Subject: 	* doc/md.texi (Standard Pattern Names): Document blockage pattern.
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=5a9b97596717c0c6671cc3ee3ba07b09f6008e1a;p=thirdparty%2Fgcc.git

	* doc/md.texi (Standard Pattern Names): Document blockage pattern.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@121268 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5a6d033e06ad..94702ad0ade8 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+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.
diff --git a/gcc/doc/md.texi b/gcc/doc/md.texi
index c209fde5dd2b..5745ec45bb64 100644
--- a/gcc/doc/md.texi
+++ b/gcc/doc/md.texi
@@ -4704,6 +4704,13 @@ respectively, a low or moderate degree of temporal locality.
 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}