* doc/invoke.texi: Adjust -flifetime-dse documentation.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@233680 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index b8b2e70..18b2b8f 100644 (file)
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -6812,7 +6812,9 @@ storage persisting beyond the lifetime of the object, you can use this
 flag to disable this optimization.  To preserve stores before the
 constructor starts (e.g. because your operator new clears the object
 storage) but still treat the object as dead after the destructor you,
-can use -flifetime-dse=1.
+can use @option{-flifetime-dse=1}.  The default behavior can be
+explicitly selected with @option{-flifetime-dse=2}.
+@option{-flifetime-dse=0} is equivalent to @option{-fno-lifetime-dse}.
 
 @item -flive-range-shrinkage
 @opindex flive-range-shrinkage