multiple_target.c (create_dispatcher_calls): Add target check on ifunc.

2015-11-03  Evgeny Stupachenko  <evstupac@gmail.com>

gcc/
	* multiple_target.c (create_dispatcher_calls): Add target check
	on ifunc.
	(create_target_clone): Change assembler name for versioned declarations.
gcc/testsuite/
	* g++.dg/ext/mvc4.C: Add dg-require-ifunc condition.
	* gcc.target/i386/mvc5.c: Ditto.
	* gcc.target/i386/mvc7.c: Add dg-require-ifunc condition and checks on
	resolver.

From-SVN: r229706

gcc/ChangeLog

+2015-11-03  Evgeny Stupachenko  <evstupac@gmail.com>
+
+	* multiple_target.c (create_dispatcher_calls): Add target check
+	on ifunc.
+	(create_target_clone): Change assembler name for versioned declarations.
+
 2015-11-03  Thomas Schwinge  <thomas@codesourcery.com>
 	    Chung-Lin Tang  <cltang@codesourcery.com>
 

gcc/multiple_target.c

@@ -61,12 +61,20 @@ create_dispatcher_calls (struct cgraph_node *node)
 	  || !DECL_FUNCTION_VERSIONED (decl))
 	continue;
 
+      if (!targetm.has_ifunc_p ())
+	{
+	  error_at (gimple_location (call),
+		    "the call requires ifunc, which is not"
+		    " supported by this target");
+	  break;
+	}
       e_next = e->next_caller;
       idecl = targetm.get_function_versions_dispatcher (decl);
       if (!idecl)
 	{
 	  error_at (gimple_location (call),
 		    "default target_clones attribute was not set");
+	  break;
 	}
       inode = cgraph_node::get (idecl);
       gcc_assert (inode);
@@ -215,6 +223,10 @@ create_target_clone (cgraph_node *node, bool definition, char *name)
     {
       tree new_decl = copy_node (node->decl);
       new_node = cgraph_node::get_create (new_decl);
+      /* Generate a new name for the new version.  */
+      symtab->change_decl_assembler_name (new_node->decl,
+					  clone_function_name (node->decl,
+							       name));
     }
   return new_node;
 }

gcc/testsuite/ChangeLog

+2015-11-03  Evgeny Stupachenko  <evstupac@gmail.com>
+
+	* g++.dg/ext/mvc4.C: Add dg-require-ifunc condition.
+	* gcc.target/i386/mvc5.c: Ditto.
+	* gcc.target/i386/mvc7.c: Add dg-require-ifunc condition and checks on
+	resolver.
+
 2015-11-03  Thomas Schwinge  <thomas@codesourcery.com>
 
 	* c-c++-common/goacc-gomp/nesting-fail-1.c: Move "atomic" tests

gcc/testsuite/g++.dg/ext/mvc4.C

 /* { dg-do compile { target i?86-*-* x86_64-*-* } } */
+/* { dg-require-ifunc "" } */
 /* { dg-options "-mavx" } */
 
 #include <immintrin.h>

gcc/testsuite/gcc.target/i386/mvc5.c

 /* { dg-do compile } */
+/* { dg-require-ifunc "" } */
 /* { dg-options "-fno-inline" } */
 /* { dg-final { scan-assembler-times "foo.ifunc" 6 } } */
 

gcc/testsuite/gcc.target/i386/mvc7.c

 /* { dg-do compile } */
+/* { dg-require-ifunc "" } */
+/* { dg-final { scan-assembler "foo.resolver" } } */
+/* { dg-final { scan-assembler "avx" } } */
+/* { dg-final { scan-assembler "slm" } } */
 /* { dg-final { scan-assembler-times "foo.ifunc" 4 } } */
 
 __attribute__((target_clones("avx","default","arch=slm","arch=core-avx2")))