1 files changed, 15 insertions, 7 deletions
diff --git a/gcc/fortran/invoke.texi b/gcc/fortran/invoke.texi
index 63a1442..8892d50 100644
--- a/gcc/fortran/invoke.texi
+++ b/gcc/fortran/invoke.texi
@@ -1120,20 +1120,28 @@ either your program or the GNU Fortran compiler.
 @item -fdump-fortran-original
 @opindex @code{fdump-fortran-original}
 Output the internal parse tree after translating the source program
-into internal representation.  Only really useful for debugging the
-GNU Fortran compiler itself.
+into internal representation.  This option is mostly useful for
+debugging the GNU Fortran compiler itself. The output generated by
+this option might change between releases. This option may also
+generate internal compiler errors for features which have only
+recently been added.
 
 @item -fdump-fortran-optimized
 @opindex @code{fdump-fortran-optimized}
-Output the parse tree after front-end optimization.  Only really
-useful for debugging the GNU Fortran compiler itself.
+Output the parse tree after front-end optimization.  Mostly useful for
+debugging the GNU Fortran compiler itself. The output generated by
+this option might change between releases.  This option may also
+generate internal compiler errors for features which have only
+recently been added.
 
 @item -fdump-parse-tree
 @opindex @code{fdump-parse-tree}
 Output the internal parse tree after translating the source program
-into internal representation.  Only really useful for debugging the
-GNU Fortran compiler itself.  This option is deprecated; use
-@code{-fdump-fortran-original} instead.
+into internal representation.  Mostly useful for debugging the GNU
+Fortran compiler itself. The output generated by this option might
+change between releases. This option may also generate internal
+compiler errors for features which have only recently been added. This
+option is deprecated; use @code{-fdump-fortran-original} instead.
 
 @item -ffpe-trap=@var{list}
 @opindex @code{ffpe-trap=}@var{list}