Make target_clones resolver fn static if possible.

	PR target/93274
	PR ipa/94271
	* config/i386/i386-features.c (make_resolver_func): Drop
	public flag for resolver.
	* config/rs6000/rs6000.c (make_resolver_func): Add comdat
	group for resolver and drop public flag if possible.
	* multiple_target.c (create_dispatcher_calls): Drop unique_name
	and resolution as we want to enable LTO privatization of the default
	symbol.
	PR target/93274
	PR ipa/94271
	* gcc.target/i386/pr81213-2.c: New test.
	* gcc.target/i386/pr81213.c: Add additional source.
	* gcc.dg/lto/pr94271_0.c: New test.
	* gcc.dg/lto/pr94271_1.c: New test.

gcc/ChangeLog

 2020-03-25  Martin Liska  <mliska@suse.cz>
 
+	PR target/93274
+	PR ipa/94271
+	* config/i386/i386-features.c (make_resolver_func): Drop
+	public flag for resolver.
+	* config/rs6000/rs6000.c (make_resolver_func): Add comdat
+	group for resolver and drop public flag if possible.
+	* multiple_target.c (create_dispatcher_calls): Drop unique_name
+	and resolution as we want to enable LTO privatization of the default
+	symbol.
+
+2020-03-25  Martin Liska  <mliska@suse.cz>
+
 	PR lto/94259
 	* configure.ac: Respect --without-zstd and report
 	error when we can't find header file with --with-zstd.

gcc/config/i386/i386-features.c

@@ -2777,6 +2777,9 @@ make_resolver_func (const tree default_decl,
       DECL_COMDAT (decl) = 1;
       make_decl_one_only (decl, DECL_ASSEMBLER_NAME (decl));
     }
+  else
+    TREE_PUBLIC (ifunc_alias_decl) = 0;
+
   /* Build result decl and add to function_decl. */
   t = build_decl (UNKNOWN_LOCATION, RESULT_DECL, NULL_TREE, ptr_type_node);
   DECL_CONTEXT (t) = decl;

gcc/config/rs6000/rs6000.c

@@ -23894,6 +23894,18 @@ make_resolver_func (const tree default_decl,
   DECL_INITIAL (decl) = make_node (BLOCK);
   DECL_STATIC_CONSTRUCTOR (decl) = 0;
 
+  if (DECL_COMDAT_GROUP (default_decl)
+      || TREE_PUBLIC (default_decl))
+    {
+      /* In this case, each translation unit with a call to this
+	 versioned function will put out a resolver.  Ensure it
+	 is comdat to keep just one copy.  */
+      DECL_COMDAT (decl) = 1;
+      make_decl_one_only (decl, DECL_ASSEMBLER_NAME (decl));
+    }
+  else
+    TREE_PUBLIC (dispatch_decl) = 0;
+
   /* Build result decl and add to function_decl.  */
   tree t = build_decl (UNKNOWN_LOCATION, RESULT_DECL, NULL_TREE, ptr_type_node);
   DECL_CONTEXT (t) = decl;

gcc/multiple_target.c

@@ -178,10 +178,6 @@ create_dispatcher_calls (struct cgraph_node *node)
   node->externally_visible = false;
   node->forced_by_abi = false;
   node->set_section (NULL);
-  node->unique_name = ((node->resolution == LDPR_PREVAILING_DEF_IRONLY
-			|| node->resolution == LDPR_PREVAILING_DEF_IRONLY_EXP)
-		       && !flag_incremental_link);
-  node->resolution = LDPR_PREVAILING_DEF_IRONLY;
 
   DECL_ARTIFICIAL (node->decl) = 1;
   node->force_output = true;

gcc/testsuite/ChangeLog

+2020-03-25  Martin Liska  <mliska@suse.cz>
+
+	PR target/93274
+	PR ipa/94271
+	* gcc.target/i386/pr81213-2.c: New test.
+	* gcc.target/i386/pr81213.c: Add additional source.
+	* gcc.dg/lto/pr94271_0.c: New test.
+	* gcc.dg/lto/pr94271_1.c: New test.
+
 2020-03-25  Jakub Jelinek  <jakub@redhat.com>
 
 	PR debug/94280

gcc/testsuite/gcc.dg/lto/pr94271_0.c

+/* PR lto/94271 */
+/* { dg-lto-do link } */
+
+int a;
+
+static int __attribute__ ((target_clones ("default", "avx512f"))) fast_clamp ()
+{}
+
+void
+c ()
+{
+  a = fast_clamp ();
+}

gcc/testsuite/gcc.dg/lto/pr94271_1.c

+int aa;
+
+static inline int __attribute__ ((target_clones ("default", "avx512f")))
+fast_clamp ()
+{}
+
+void
+b ()
+{
+  aa = fast_clamp ();
+}
+
+int
+main ()
+{
+  return 0;
+}

gcc/testsuite/gcc.target/i386/pr81213-2.c

+__attribute__((target_clones("avx","arch=slm","arch=core-avx2","default")))
+static int
+foo ()
+{
+  return 2;
+}
+
+int bar()
+{
+  return foo();
+}

gcc/testsuite/gcc.target/i386/pr81213.c

 /* PR ipa/81214.  */
-/* { dg-do compile } */
+/* { dg-do run } */
 /* { dg-require-ifunc "" } */
+/* { dg-additional-sources "pr81213-2.c" } */
+
+int bar();
 
 __attribute__((target_clones("avx","arch=slm","arch=core-avx2","default")))
 static int
@@ -11,7 +14,7 @@ foo ()
 
 int main()
 {
-  return foo();
+  return foo() + bar();
 }
 
 /* { dg-final { scan-assembler "\t.globl\tfoo" } } */