re PR target/58944 (bogus -Wunused-macros warnings when compiling Libreoffice)

	PR target/58944
	* config/i386/i386-c.c (ix86_pragma_target_parse): Temporarily
	clear cpp_get_options (parse_in)->warn_unused_macros for
	ix86_target_macros_internal with cpp_define.

	* gcc.target/i386/pr58944.c: Drop -march=native from dg-options.
	Remove dg-prune-output lines.

From-SVN: r206750

gcc/ChangeLog

+2014-01-18  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/58944
+	* config/i386/i386-c.c (ix86_pragma_target_parse): Temporarily
+	clear cpp_get_options (parse_in)->warn_unused_macros for
+	ix86_target_macros_internal with cpp_define.
+
 2014-01-18  Richard Sandiford  <rdsandiford@googlemail.com>
 
 	* jump.c (delete_related_insns): Keep (use (insn))s.

gcc/config/i386/i386-c.c

@@ -460,6 +460,13 @@ ix86_pragma_target_parse (tree args, tree pop_target)
 			       (enum fpmath_unit) prev_opt->x_ix86_fpmath,
 			       cpp_undef);
 
+  /* For the definitions, ensure all newly defined macros are considered
+     as used for -Wunused-macros.  There is no point warning about the
+     compiler predefined macros.  */
+  cpp_options *cpp_opts = cpp_get_options (parse_in);
+  unsigned char saved_warn_unused_macros = cpp_opts->warn_unused_macros;
+  cpp_opts->warn_unused_macros = 0;
+
   /* Define all of the macros for new options that were just turned on.  */
   ix86_target_macros_internal (cur_isa & diff_isa,
 			       cur_arch,
@@ -467,6 +474,8 @@ ix86_pragma_target_parse (tree args, tree pop_target)
 			       (enum fpmath_unit) cur_opt->x_ix86_fpmath,
 			       cpp_define);
 
+  cpp_opts->warn_unused_macros = saved_warn_unused_macros;
+
   return true;
 }
 

gcc/testsuite/ChangeLog

+2014-01-18  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/58944
+	* gcc.target/i386/pr58944.c: Drop -march=native from dg-options.
+	Remove dg-prune-output lines.
+
 2014-01-17  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/59706

gcc/testsuite/gcc.target/i386/pr58944.c

 /* { dg-do compile } */
-/* { dg-options "-Wunused-macros -march=native" } */
+/* { dg-options "-Wunused-macros" } */
 
 #pragma GCC push_options
 #pragma GCC target("xsaveopt")
 void fn1(void) {}
 #pragma GCC pop_options
-
-/* { dg-prune-output "macro \"__code_model_" } */ 
-/* { dg-prune-output "macro \"__XSAVE__\" is not used" } */ 
-/* { dg-prune-output "macro \"__XSAVEOPT__\" is not used" } */