Handle noipa attribute in IPA visibility (PR ipa/83594).

2018-01-03  Martin Liska  <mliska@suse.cz>

	PR ipa/83594
	* ipa-visibility.c (function_and_variable_visibility): Skip
	functions with noipa attribure.
2018-01-03  Martin Liska  <mliska@suse.cz>

	PR ipa/83594
	* gcc.dg/ipa/pr83594.c: New test.

From-SVN: r256167

gcc/ChangeLog

+2018-01-03  Martin Liska  <mliska@suse.cz>
+
+	PR ipa/83594
+	* ipa-visibility.c (function_and_variable_visibility): Skip
+	functions with noipa attribure.
+
 2018-01-03  Jakub Jelinek  <jakub@redhat.com>
 
 	* gcc.c (process_command): Update copyright notice dates.

gcc/ipa-visibility.c

@@ -623,7 +623,8 @@ function_and_variable_visibility (bool whole_program)
     {
       if (node->get_availability () != AVAIL_INTERPOSABLE
 	  || DECL_EXTERNAL (node->decl)
-	  || node->has_aliases_p ())
+	  || node->has_aliases_p ()
+	  || lookup_attribute ("noipa", DECL_ATTRIBUTES (node->decl)))
 	continue;
 
       cgraph_node *alias = 0;

gcc/testsuite/ChangeLog

+2018-01-03  Martin Liska  <mliska@suse.cz>
+
+	PR ipa/83594
+	* gcc.dg/ipa/pr83594.c: New test.
+
 2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
 	    Alan Hayward  <alan.hayward@arm.com>
 	    David Sherwood  <david.sherwood@arm.com>

gcc/testsuite/gcc.dg/ipa/pr83594.c

+__attribute__((noipa))
+void foo ()
+{
+  foo ();
+}