Do not allow target_clones with alias attr (PR lto/90500).

2019-05-16  Martin Liska  <mliska@suse.cz>

	PR lto/90500
	* multiple_target.c (expand_target_clones): Do not allow
	target_clones being used with a symbol that is an alias.
2019-05-16  Martin Liska  <mliska@suse.cz>

	PR lto/90500
	* gcc.target/i386/pr90500-1.c: New test.
	* gcc.target/i386/pr90500-2.c: New test.

From-SVN: r271289

gcc/ChangeLog

+2019-05-16  Martin Liska  <mliska@suse.cz>
+
+	PR lto/90500
+	* multiple_target.c (expand_target_clones): Do not allow
+	target_clones being used with a symbol that is an alias.
+
 2019-05-16  Vladislav Ivanishin  <vlad@ispras.ru>
 
 	PR tree-optimization/90394

gcc/multiple_target.c

@@ -356,7 +356,7 @@ expand_target_clones (struct cgraph_node *node, bool definition)
     }
 
   if (node->definition
-      && !tree_versionable_function_p (node->decl))
+      && (node->alias || !tree_versionable_function_p (node->decl)))
     {
       auto_diagnostic_group d;
       error_at (DECL_SOURCE_LOCATION (node->decl),
@@ -365,6 +365,9 @@ expand_target_clones (struct cgraph_node *node, bool definition)
       if (lookup_attribute ("noclone", DECL_ATTRIBUTES (node->decl)))
 	reason = G_("function %q+F can never be copied "
 		    "because it has %<noclone%> attribute");
+      else if (node->alias)
+	reason
+	  = "%<target_clones%> cannot be combined with %<alias%> attribute";
       else
 	reason = copy_forbidden (DECL_STRUCT_FUNCTION (node->decl));
       if (reason)

gcc/testsuite/ChangeLog

+2019-05-16  Martin Liska  <mliska@suse.cz>
+
+	PR lto/90500
+	* gcc.target/i386/pr90500-1.c: New test.
+	* gcc.target/i386/pr90500-2.c: New test.
+
 2019-05-16  Vladislav Ivanishin  <vlad@ispras.ru>
 
 	PR tree-optimization/90394

gcc/testsuite/gcc.target/i386/pr90500-1.c

+/* PR middle-end/84723 */
+/* { dg-do compile } */
+/* { dg-require-ifunc } */
+
+__attribute__((target_clones("arch=haswell", "default"))) int __tanh() {}
+__typeof(__tanh) tanhf64 __attribute__((alias("__tanh")))/* { dg-error "clones for .target_clones. attribute cannot be created" } */
+  /* { dg-message "'target_clones' cannot be combined with 'alias' attribute" "" { target *-*-* } .-1 } */
+__attribute__((__copy__(__tanh)));

gcc/testsuite/gcc.target/i386/pr90500-2.c

+/* PR middle-end/84723 */
+/* { dg-do compile } */
+/* { dg-require-ifunc } */
+
+__attribute__((target_clones("arch=haswell", "default"))) int __tanh() {}
+__typeof(__tanh) tanhf64 __attribute__((alias("__tanh"),target_clones("arch=haswell", "default"))); /* { dg-error "clones for .target_clones. attribute cannot be created" } */
+  /* { dg-message "'target_clones' cannot be combined with 'alias' attribute" "" { target *-*-* } .-1 } */