From 5f9fb0e305dd9ff2cfabe5f1002e3b0578ea8fef Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Fri, 5 Apr 2002 17:14:42 -0800 Subject: [PATCH] * doc/rtl.texi (Regs and Memory): Document (mem:BLK (scratch)). From-SVN: r51936 --- gcc/ChangeLog | 4 ++++ gcc/doc/rtl.texi | 4 ++++ 2 files changed, 8 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index fb9e011b3f3..9d662386982 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2002-04-05 Richard Henderson + + * doc/rtl.texi (Regs and Memory): Document (mem:BLK (scratch)). + 2002-04-05 Jakub Jeilnek * mklibgcc.in: Use $tmpmapfile, not tmp-$@. diff --git a/gcc/doc/rtl.texi b/gcc/doc/rtl.texi index 10c81e47d65..efe36471e0a 100644 --- 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 -- 2.30.2