[Bug fortran/55591] strict-aliasing & Fortran

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55591

Tobias Burnus <burnus at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |burnus at gcc dot gnu.org

--- Comment #3 from Tobias Burnus <burnus at gcc dot gnu.org> 2012-12-04 17:05:45 UTC ---
Untested (but successfully compiled) patch:

--- a/gcc/fortran/options.c
+++ b/gcc/fortran/options.c
@@ -170,4 +170,6 @@ gfc_init_options (unsigned int decoded_options_count,
   set_default_std_flags ();

+  flag_strict_aliasing = -1;
+
   /* Initialize cpp-related options.  */
   gfc_cpp_init_options (decoded_options_count, decoded_options);
@@ -275,4 +277,8 @@ gfc_post_options (const char **pfilename)
     gfc_option.flag_whole_file = 1;

+  /* By default use strict-aliasing semantics.  */
+  if (flag_strict_aliasing == -1)
+    flag_strict_aliasing = 1;
+
   /* Fortran allows associative math - but we cannot reassociate if
      we want traps or signed zeros. Cf. also flag_protect_parens.  */