Strip target_clones in copy attribute (PR lto/90500).

2019-05-22  Martin Liska  <mliska@suse.cz>

	PR lto/90500
	* c-attribs.c (handle_copy_attribute): Do not copy
	target_clones attribute.
2019-05-22  Martin Liska  <mliska@suse.cz>

	PR lto/90500
	* gcc.target/i386/pr90500-1.c: Make the test-case valid
	now.
2019-05-22  Martin Liska  <mliska@suse.cz>

	PR lto/90500
	* doc/extend.texi: Document the change.

From-SVN: r271504

gcc/ChangeLog

+2019-05-22  Martin Liska  <mliska@suse.cz>
+
+	PR lto/90500
+	* doc/extend.texi: Document the change.
+
 2019-05-22  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/90450

gcc/c-family/ChangeLog

+2019-05-22  Martin Liska  <mliska@suse.cz>
+
+	PR lto/90500
+	* c-attribs.c (handle_copy_attribute): Do not copy
+	target_clones attribute.
+
 2019-05-21  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* c-ada-spec.h (enum cpp_operation): Add IS_ASSIGNMENT_OPERATOR.

gcc/c-family/c-attribs.c

@@ -2486,7 +2486,8 @@ handle_copy_attribute (tree *node, tree name, tree args,
 	      || is_attribute_p ("noinline", atname)
 	      || is_attribute_p ("visibility", atname)
 	      || is_attribute_p ("weak", atname)
-	      || is_attribute_p ("weakref", atname))
+	      || is_attribute_p ("weakref", atname)
+	      || is_attribute_p ("target_clones", atname))
 	    continue;
 
 	  /* Attribute leaf only applies to extern functions.

gcc/doc/extend.texi

@@ -2749,7 +2749,8 @@ or variable) must match the kind of symbol to which the argument refers.
 The @code{copy} attribute copies only syntactic and semantic attributes
 but not attributes that affect a symbol's linkage or visibility such as
 @code{alias}, @code{visibility}, or @code{weak}.  The @code{deprecated}
-attribute is also not copied.  @xref{Common Type Attributes}.
+and @code{target_clones} attribute are also not copied.
+@xref{Common Type Attributes}.
 @xref{Common Variable Attributes}.
 
 For example, the @var{StrongAlias} macro below makes use of the @code{alias}

gcc/testsuite/ChangeLog

+2019-05-22  Martin Liska  <mliska@suse.cz>
+
+	PR lto/90500
+	* gcc.target/i386/pr90500-1.c: Make the test-case valid
+	now.
+
 2019-05-22  Richard Biener  <rguenther@suse.de>
 
 	* gcc.dg/tree-ssa/ssa-lim-13.c: New testcase.

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

@@ -3,6 +3,5 @@
 /* { 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 } */
+__typeof(__tanh) tanhf64 __attribute__((alias("__tanh")))
 __attribute__((__copy__(__tanh)));