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

From-SVN: r233680

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index b8b2e7060d9d4a28a2a2fbe93cf5eb917e1fa789..18b2b8f31075b6286d63d1f489c2769daac6cec5 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