* doc/rtl.texi (Regs and Memory): Document (mem:BLK (scratch)).

From-SVN: r51936

* doc/rtl.texi (Regs and Memory): Document (mem:BLK (scratch)).
From-SVN: r51936
5f9fb0e3 · Richard Henderson · Richard Henderson · 39b945d2 · 5f9fb0e3 · 5f9fb0e3
Commit 5f9fb0e3 authored Apr 05, 2002 by Richard Henderson Committed by Richard Henderson Apr 05, 2002
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gcc/doc/rtl.texi
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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
+2002-04-05  Richard Henderson  <rth@redhat.com>
+
+	* doc/rtl.texi (Regs and Memory): Document (mem:BLK (scratch)).
+
 2002-04-05  Jakub Jeilnek  <jakub@redhat.com>

 	* mklibgcc.in: Use $tmpmapfile, not tmp-$@.

--- a/gcc/doc/rtl.texi
+++ b/gcc/doc/rtl.texi
@@ -1558,6 +1558,10 @@ a unit of memory is accessed.  @var{alias} specifies an alias set for the
 reference.  In general two items are in different alias sets if they cannot
 reference the same memory address.

+The construct @code{(mem:BLK (scratch))} is considered to alias all
+other memories.  Thus it may be used as a memory barrier in epilogue
+stack deallocation patterns.
+
 @findex addressof
 @item (addressof:@var{m} @var{reg})
 This RTX represents a request for the address of register @var{reg}.  Its mode