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Diffstat (limited to 'gcc/doc/rtl.texi')
| -rw-r--r-- | gcc/doc/rtl.texi | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/doc/rtl.texi b/gcc/doc/rtl.texi index 10c81e4..efe3647 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 |