make ObjC do LTO.

gcc/
	PR objc/44140
	* config/darwin.c (output_objc_section_asm_op): Save and restore
	section when outputting ObjC section list.

testsuite/

	PR objc/44140
	* objc.dg/lto/trivial-1_0.m: New.
	* objc.dg/lto/lto.exp: New.
	* obj-c++.dg/lto/trivial-1_0.mm: New.
	* obj-c++.dg/lto/lto.exp: New.
	* objc.dg/symtab-1.m: Adjust sizes.
	* objc.dg/image-info.m: Do not run for gnu-runtime.

gcc/objc/

	PR objc/44140
	* objc-act.c: build_objc_string_decl() remove declaration.
	(finish_var_decl): Remove forcing of var output and marking
	as "Used". 
	(init_def_list): Use integer_zero_node. 
	(init_objc_symtab): Use integer_zero_node, make the short
	integer type specific on relevant nodes.
	(generate_objc_symtab_decl): Remove call to 
	forward_declare_categories().  Use null_pointer_node where
	appropriate.  
	(build_module_descriptor): Comment and mark this item as 
	DECL_PRESERVE_P. 
	(generate_static_references): Use gcc_unreachable instead of
	abort (). 
	(diagnose_missing_method): New.
	(build_next_selector_translation_table): New.
	(build_gnu_selector_translation_table): New.
	(add_objc_string): Merge code from build_objc_string_decl...
	... and delete build_objc_string_decl().
	(generate_dispatch_table): Make integer types explicit.
	(generate_category): Pass implent and arrange for the data
	to be extracted within the routine.  Do not start new vars, 
	but finish the ones collcted during parsing.
	(generate_shared_structures): Likewise.
	(finish_objc):  Reorder code so that we finish variables before
	referencing them.  Save the global data before calling meta-data
	creation routines, and pass the current reference to the two 
	main routines.  Only call generate_objc_image_info () for the 
	NeXT runtime.
	(generate_classref_translation_entry): Comment on and make this
	item DECL_PRESERVE_P.
	(handle_class_ref): Use varpool interfaces, comment on and make
	this item DECL_PRESERVE_P.
	(handle_impent): Likewise.
	(generate_objc_image_info): Only generate when the content is 
	non-zero.  Make integer types explict.

From-SVN: r162030

gcc/ChangeLog

+2010-07-10  Iain Sandoe  <iains@gcc.gnu.org>
+
+	PR objc/44140
+	* config/darwin.c (output_objc_section_asm_op): Save and restore
+	section when outputting ObjC section list.
+
 2010-07-09  Jan Hubicka  <jh@suse.cz>
 
 	* lto-streamer-out.c (produce_symtab): Do not write alias cgraph/varpool

gcc/config/darwin.c

@@ -99,6 +99,7 @@ output_objc_section_asm_op (const void *directive)
      section is requested.  */
   if (! been_here)
     {
+      section *saved_in_section = in_section;
       static const enum darwin_section_enum tomark[] =
 	{
 	  /* written, cold -> hot */
@@ -129,6 +130,7 @@ output_objc_section_asm_op (const void *directive)
       been_here = true;
       for (i = 0; i < ARRAY_SIZE (tomark); i++)
 	switch_to_section (darwin_sections[tomark[i]]);
+      switch_to_section (saved_in_section);
     }
   output_section_asm_op (directive);
 }

gcc/objc/ChangeLog

+2010-07-10  Iain Sandoe  <iains@gcc.gnu.org>
+
+	PR objc/44140
+	* objc-act.c: build_objc_string_decl() remove declaration.
+	(finish_var_decl): Remove forcing of var output and marking
+	as "Used". 
+	(init_def_list): Use integer_zero_node. 
+	(init_objc_symtab): Use integer_zero_node, make the short
+	integer type specific on relevant nodes.
+	(generate_objc_symtab_decl): Remove call to 
+	forward_declare_categories().  Use null_pointer_node where
+	appropriate.  
+	(build_module_descriptor): Comment and mark this item as 
+	DECL_PRESERVE_P. 
+	(generate_static_references): Use gcc_unreachable instead of
+	abort (). 
+	(diagnose_missing_method): New.
+	(build_next_selector_translation_table): New.
+	(build_gnu_selector_translation_table): New.
+	(add_objc_string): Merge code from build_objc_string_decl...
+	... and delete build_objc_string_decl().
+	(generate_dispatch_table): Make integer types explicit.
+	(generate_category): Pass implent and arrange for the data
+	to be extracted within the routine.  Do not start new vars, 
+	but finish the ones collcted during parsing.
+	(generate_shared_structures): Likewise.
+	(finish_objc):  Reorder code so that we finish variables before
+	referencing them.  Save the global data before calling meta-data
+	creation routines, and pass the current reference to the two 
+	main routines.  Only call generate_objc_image_info () for the 
+	NeXT runtime.
+	(generate_classref_translation_entry): Comment on and make this
+	item DECL_PRESERVE_P.
+	(handle_class_ref): Use varpool interfaces, comment on and make
+	this item DECL_PRESERVE_P.
+	(handle_impent): Likewise.
+	(generate_objc_image_info): Only generate when the content is 
+	non-zero.  Make integer types explict.
+
 2010-07-03  Nathan Froyd  <froydnj@codesourcery.com>
 
 	PR objc/24867

gcc/testsuite/ChangeLog

+2010-07-10  Iain Sandoe  <iains@gcc.gnu.org>
+
+	PR objc/44140
+	* objc.dg/lto/trivial-1_0.m: New.
+	* objc.dg/lto/lto.exp: New.
+	* obj-c++.dg/lto/trivial-1_0.mm: New.
+	* obj-c++.dg/lto/lto.exp: New.
+	* objc.dg/symtab-1.m: Adjust sizes.
+	* objc.dg/image-info.m: Do not run for gnu-runtime.
+
 2010-07-09  Bernd Schmidt  <bernds@codesourcery.com>
 
 	* gcc.dg/pr32370.c: Allow another kind of error message.

gcc/testsuite/obj-c++.dg/lto/lto.exp

+# Copyright (C) 2010 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GCC; see the file COPYING3.  If not see
+# <http://www.gnu.org/licenses/>.
+#
+# Based on gcc/testsuite/gcc.dg/lto/lto.exp.
+
+# Test link-time optimization across multiple files.
+#
+# Programs are broken into multiple files.  Each one is compiled
+# separately with LTO information.  The final executable is generated
+# by collecting all the generated object files using regular LTO or WHOPR.
+
+if $tracelevel then {
+    strace $tracelevel
+}
+
+# Load procedures from common libraries. 
+load_lib standard.exp
+load_lib obj-c++-dg.exp
+
+# Load the language-independent compabibility support procedures.
+load_lib lto.exp
+
+# If LTO has not been enabled, bail.
+if { ![check_effective_target_lto] } {
+    return
+}
+
+global LTO_OPTIONS
+
+set LTO_OPTIONS [list	\
+  {-O0 -fwhopr -fgnu-runtime}	\
+  {-O2 -fwhopr -fgnu-runtime}	\
+  {-O0 -flto -fgnu-runtime} 	\
+  {-O2 -flto -fgnu-runtime}	\
+]
+
+obj-c++_init
+lto_init no-mathlib
+
+# Define an identifier for use with this suite to avoid name conflicts
+# with other lto tests running at the same time.
+set sid "obj_cpp_lto"
+set tests [lsort [glob -nocomplain $srcdir/$subdir/*_0.mm]]
+
+# Main loop.
+foreach src $tests {
+    # If we're only testing specific files and this isn't one of them, skip it.
+    if ![runtest_file_p $runtests $src] then {
+	continue
+    }
+    lto-execute $src $sid
+}
+
+# darwin targets can also run code with the NeXT runtime.
+if [istarget "*-*-darwin*" ] {
+set LTO_OPTIONS [list	\
+  {-O0 -fwhopr -fnext-runtime}	\
+  {-O2 -fwhopr -fnext-runtime}	\
+  {-O0 -flto -fnext-runtime} 	\
+  {-O2 -flto -fnext-runtime}	\
+]
+  foreach src $tests {
+    # If we're only testing specific files and this isn't one of them, skip it.
+    if ![runtest_file_p $runtests $src] then {
+	continue
+    }
+    lto-execute $src $sid
+  }
+}
+
+lto_finish

gcc/testsuite/obj-c++.dg/lto/trivial-1_0.mm

+/* { dg-lto-do run } */
+/* { dg-skip-if "Needs OBJC2 ABI" { "*-*-darwin*" && lp64 } { "*" } { "" } } */
+extern "C" {
+extern int printf (char *,...) ;
+extern void abort (void) ;
+} 
+
+typedef struct objc_class *Class;
+
+struct objc_class {
+    Class isa;
+    /* other stuff... */
+}  ;
+
+@interface myRootObject {
+@public
+     Class isa; 
+}
++initialize;
++(Class)class;
+
+@end
+
+@implementation myRootObject
+++initialize {
+     return self;
+}
+
++(Class)class {
+     return (Class)self;
+}
+
+@end
+
+int main(void)
+{
+  Class cl = [myRootObject class];
+  if (cl != (Class)0) {
+    printf((char *)"trivial OK\n");
+    return 0;
+  }
+  abort () ;
+}

gcc/testsuite/objc.dg/image-info.m

@@ -4,6 +4,7 @@
 /* Contributed by Ziemowit Laski <zlaski@apple.com>.  */
 
 /* { dg-do compile { target { *-*-darwin* } } } */
+/* { dg-skip-if "NeXT-only" { *-*-* } { "-fgnu-runtime" } { "" } } */
 /* { dg-options "-freplace-objc-classes" } */
 
 #include "../objc-obj-c++-shared/Object1.h"

gcc/testsuite/objc.dg/lto/lto.exp

+# Copyright (C) 2010 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GCC; see the file COPYING3.  If not see
+# <http://www.gnu.org/licenses/>.
+#
+# Based on gcc/testsuite/gcc.dg/lto/lto.exp.
+
+# Test link-time optimization across multiple files.
+#
+# Programs are broken into multiple files.  Each one is compiled
+# separately with LTO information.  The final executable is generated
+# by collecting all the generated object files using regular LTO or WHOPR.
+
+if $tracelevel then {
+    strace $tracelevel
+}
+
+# Load procedures from common libraries. 
+load_lib standard.exp
+load_lib objc-dg.exp
+
+# Load the language-independent compabibility support procedures.
+load_lib lto.exp
+
+# If LTO has not been enabled, bail.
+if { ![check_effective_target_lto] } {
+    return
+}
+
+global LTO_OPTIONS
+
+set LTO_OPTIONS [list	\
+  {-O0 -fwhopr -fgnu-runtime}	\
+  {-O2 -fwhopr -fgnu-runtime}	\
+  {-O0 -flto -fgnu-runtime} 	\
+  {-O2 -flto -fgnu-runtime}	\
+]
+
+objc_init
+lto_init no-mathlib
+
+# Define an identifier for use with this suite to avoid name conflicts
+# with other lto tests running at the same time.
+set sid "objc_lto"
+set tests [lsort [glob -nocomplain $srcdir/$subdir/*_0.m]]
+
+# Main loop.
+foreach src $tests {
+    # If we're only testing specific files and this isn't one of them, skip it.
+    if ![runtest_file_p $runtests $src] then {
+	continue
+    }
+    lto-execute $src $sid
+}
+
+# darwin targets can also run code with the NeXT runtime.
+if [istarget "*-*-darwin*" ] {
+set LTO_OPTIONS [list	\
+  {-O0 -fwhopr -fnext-runtime}	\
+  {-O2 -fwhopr -fnext-runtime}	\
+  {-O0 -flto -fnext-runtime} 	\
+  {-O2 -flto -fnext-runtime}	\
+]
+  foreach src $tests {
+    # If we're only testing specific files and this isn't one of them, skip it.
+    if ![runtest_file_p $runtests $src] then {
+	continue
+    }
+    lto-execute $src $sid
+  }
+}
+
+lto_finish

gcc/testsuite/objc.dg/lto/trivial-1_0.m

+/* { dg-lto-do run } */
+/* { dg-skip-if "" { "*-*-darwin*" && lp64 } { "*" } { "" } } */
+extern int printf (char *,...) ;
+
+typedef struct objc_class *Class;
+
+struct objc_class {
+    Class isa;
+    /* other stuff... */
+}  ;
+
+@interface myRootObject {
+@public
+     Class isa;
+}
++initialize;
++(Class)class;
+
+@end
+
+@implementation myRootObject
+++initialize {
+     return self;
+}
+
++(Class)class {
+     return (Class)self;
+}
+
+@end
+
+int main(void)
+{
+  [myRootObject class];
+  printf("trivial OK\n");
+  return 0;
+}

gcc/testsuite/objc.dg/symtab-1.m

@@ -22,6 +22,7 @@
 -(void)checkValues { }
 @end
 
-/* { dg-final { scan-assembler "L_OBJC_SYMBOLS.*:\n\t.long\t0\n\t.long\t0\n\t.word\t2\n\t.word\t0\n\t.long\tL_OBJC_CLASS_Derived.*\n\t.long\tL_OBJC_CLASS_Base.*\n" { target { i?86-*-darwin* && { ! lp64 } } } } } */
-/* { dg-final { scan-assembler "L_OBJC_SYMBOLS.*:\n\t.long\t0\n\t.long\t0\n\t.short\t2\n\t.short\t0\n\t.long\tL_OBJC_CLASS_Derived.*\n\t.long\tL_OBJC_CLASS_Base.*\n" { target { powerpc-*-darwin* && { ! lp64 } } } } } */
-/* { dg-final { scan-assembler "L_OBJC_SYMBOLS.*:\n\t.quad\t0\n\t.long\t0\n\t.space 4\n\t.word\t2\n\t.word\t0\n\t.space 4\n\t.quad\tL_OBJC_CLASS_Derived.*\n\t.quad\tL_OBJC_CLASS_Base.*\n" { target { *-*-darwin* && { lp64 } } } } } */
+/* { dg-final { scan-assembler "L_OBJC_SYMBOLS.*:\n\t.long\t0\n\t.long\t0\n\t.word\t2\n\t.word\t0\n\t.long\tL_OBJC_CLASS_Derived.*\n\t.long\tL_OBJC_CLASS_Base.*\n" { target { *86*-*-darwin* && { ! lp64 } } } } } */
+/* { dg-final { scan-assembler "L_OBJC_SYMBOLS.*:\n\t.long\t0\n\t.long\t0\n\t.short\t2\n\t.short\t0\n\t.long\tL_OBJC_CLASS_Derived.*\n\t.long\tL_OBJC_CLASS_Base.*\n" { target { powerpc*-*-darwin* && { ! lp64 } } } } } */
+/* { dg-final { scan-assembler "L_OBJC_SYMBOLS.*:\n\t.quad\t0\n\t.quad\t0\n\t.word\t2\n\t.word\t0\n\t.space 4\n\t.quad\tL_OBJC_CLASS_Derived.*\n\t.quad\tL_OBJC_CLASS_Base.*\n" { target { *86*-*-darwin* && { lp64 } } } } } */
+/* { dg-final { scan-assembler "L_OBJC_SYMBOLS.*:\n\t.quad\t0\n\t.quad\t0\n\t.short\t2\n\t.short\t0\n\t.space 4\n\t.quad\tL_OBJC_CLASS_Derived.*\n\t.quad\tL_OBJC_CLASS_Base.*\n" { target { powerpc*-*-darwin* && { lp64 } } } } } */