common.opt (ffat-lto-objects): Disable by default.

	* common.opt (ffat-lto-objects): Disable by default.
	* doc/invoke.texi (fat-lto-objects): Update documentation.
	* opts.c: Enable fat-lto-objects on lto plugin disable setups.

From-SVN: r205065

gcc/ChangeLog

+2013-11-20  Jan Hubicka  <jh@suse.cz>
+
+	* common.opt (ffat-lto-objects): Disable by default.
+	* doc/invoke.texi (fat-lto-objects): Update documentation.
+	* opts.c: Enable fat-lto-objects on lto plugin disable setups.
+
 2013-11-19  Martin Jambor  <mjambor@suse.cz>
 
 	PR rtl-optimization/59099
@@ -1472,6 +1478,7 @@
 	(ssa_fix_duplicate_block_edges): Corresponding changes.
 	(ssa_fixup_template_block, thread_single_edge):  Likewise.
 
+>>>>>>> .r205063
 2013-11-18  Marek Polacek  <polacek@redhat.com>
 
 	* doc/invoke.texi: Extend -fsanitize=undefined documentation.

gcc/common.opt

@@ -1156,7 +1156,7 @@ ffast-math
 Common
 
 ffat-lto-objects
-Common Var(flag_fat_lto_objects) Init(1)
+Common Var(flag_fat_lto_objects)
 Output lto objects containing both the intermediate language and binary output.
 
 ffinite-math-only
@@ -1392,6 +1392,10 @@ fipa-pure-const
 Common Report Var(flag_ipa_pure_const) Init(0) Optimization
 Discover pure and const functions
 
+fipa-sem-equality
+Common Report Var(flag_ipa_sem_equality) Iinit(1) Optimization
+Perform Semantic function equality
+
 fipa-reference
 Common Report Var(flag_ipa_reference) Init(0) Optimization
 Discover readonly and non addressable static variables

gcc/doc/invoke.texi

@@ -8626,9 +8626,8 @@ need to support linker plugins to allow a full-featured build environment
 @command{gcc-nm}, @command{gcc-ranlib} wrappers to pass the right options
 to these tools. With non fat LTO makefiles need to be modified to use them.
 
-The default is @option{-ffat-lto-objects} but this default is intended to
-change in future releases when linker plugin enabled environments become more
-common.
+The default is @option{-fno-fat-lto-objects} on targets with linker plugin
+support.
 
 @item -fcompare-elim
 @opindex fcompare-elim

gcc/opts.c

@@ -493,6 +493,7 @@ static const struct default_options default_options_table[] =
     { OPT_LEVELS_2_PLUS, OPT_fvect_cost_model_, NULL, VECT_COST_MODEL_CHEAP },
     { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_foptimize_strlen, NULL, 1 },
     { OPT_LEVELS_2_PLUS, OPT_fhoist_adjacent_loads, NULL, 1 },
+    { OPT_LEVELS_2_PLUS, OPT_fipa_sem_equality, NULL, 1 },
     { OPT_LEVELS_2_PLUS, OPT_fisolate_erroneous_paths, NULL, 1 },
 
     /* -O3 optimizations.  */
@@ -809,8 +810,12 @@ finish_options (struct gcc_options *opts, struct gcc_options *opts_set,
       error_at (loc, "LTO support has not been enabled in this configuration");
 #endif
       if (!opts->x_flag_fat_lto_objects && !HAVE_LTO_PLUGIN)
+	{
+	  if (opts_set->x_flag_fat_lto_objects)
             error_at (loc, "-fno-fat-lto-objects are supported only with linker plugin.");
-}
+	  opts->x_flag_fat_lto_objects = 1;
+	}
+    }
   if ((opts->x_flag_lto_partition_balanced != 0) + (opts->x_flag_lto_partition_1to1 != 0)
        + (opts->x_flag_lto_partition_none != 0) >= 1)
     {