Tolerate different definitions of symbols in lto

gcc/

	PR lto/64076
	* ipa-visibility.c (update_visibility_by_resolution_info): Only
	assert when not in lto mode.

From-SVN: r220561

gcc/ChangeLog

+2015-02-09  Trevor Saunders  <tsaunders@mozilla.com>
+
+	PR lto/64076
+	* ipa-visibility.c (update_visibility_by_resolution_info): Only
+	assert when not in lto mode.
+
 2015-02-09  Zhouyi Zhou   <yizhouzhou@ict.ac.cn>
 
 	* ira-color.c (setup_left_conflict_sizes_p): Simplify

gcc/ipa-visibility.c

@@ -424,11 +424,19 @@ update_visibility_by_resolution_info (symtab_node * node)
   if (node->same_comdat_group)
     for (symtab_node *next = node->same_comdat_group;
 	 next != node; next = next->same_comdat_group)
-      gcc_assert (!next->externally_visible
-		  || define == (next->resolution == LDPR_PREVAILING_DEF_IRONLY
-			        || next->resolution == LDPR_PREVAILING_DEF
-			        || next->resolution == LDPR_UNDEF
-			        || next->resolution == LDPR_PREVAILING_DEF_IRONLY_EXP));
+      {
+	if (!next->externally_visible)
+	  continue;
+
+	bool same_def
+	  = define == (next->resolution == LDPR_PREVAILING_DEF_IRONLY
+		       || next->resolution == LDPR_PREVAILING_DEF
+		       || next->resolution == LDPR_UNDEF
+		       || next->resolution == LDPR_PREVAILING_DEF_IRONLY_EXP);
+	gcc_assert (in_lto_p || same_def);
+	if (!same_def)
+	  return;
+      }
 
   if (node->same_comdat_group)
     for (symtab_node *next = node->same_comdat_group;

gcc/testsuite/g++.dg/lto/pr64076.H

+struct Base {
+  virtual void f() = 0;
+};
+
+struct X : public Base { };
+struct Y : public Base { };
+struct Z : public Base { };
+struct T : public Base { };
+
+struct S : public X, public Y, public Z
+#ifdef XXX
+, public T
+#endif
+{
+  void f()
+#ifdef XXX
+  { }
+#endif
+  ;
+};

gcc/testsuite/g++.dg/lto/pr64076_0.C

+// { dg-lto-do link }
+
+#define XXX
+#include "pr64076.H"
+
+int main()
+{
+  S s;
+  return 0;
+}

gcc/testsuite/g++.dg/lto/pr64076_1.C

+// { dg-options -fno-lto }
+
+#include "pr64076.H"
+
+void S::f() { }