Add __attribute__((__simd__)) to GCC.

gcc/
	* omp-low.c (pass_omp_simd_clone::gate): If target allows - call
	without additional conditions.
	* doc/extend.texi (@item simd): New.
gcc/c-family/
	* c-common.c (handle_simd_attribute): New.
	(struct attribute_spec): Add entry for "simd".
	(handle_simd_attribute): New.
gcc/c/
	* c-parser.c (c_finish_omp_declare_simd): Look for
	"simd" attribute as well. Update error message.
gcc/cp/
	* parser.c (cp_parser_late_parsing_cilk_simd_fn_info): Look for
	"simd" attribute as well. Update error message.
gcc/testsuite/
	* c-c++-common/attr-simd.c: New test.
	* c-c++-common/attr-simd-2.c: New test.
	* c-c++-common/attr-simd-3.c: New test.

From-SVN: r230422

13 files changed, 164 insertions, 12 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b5d3fe3..8fb0728 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2015-11-16  Kirill Yukhin  <kirill.yukhin@intel.com>
+
+	* omp-low.c (pass_omp_simd_clone::gate): If target allows - call
+	without additional conditions.
+	* doc/extend.texi (@item simd): New.
+
 2015-11-16  Tom de Vries  <tom@codesourcery.com>
 
 	* passes.c (first_pass_instance): Remove variable.
diff --git a/gcc/c-family/ChangeLog b/gcc/c-family/ChangeLog
index 7262cfd..518c5ef 100644
--- a/gcc/c-family/ChangeLog
+++ b/gcc/c-family/ChangeLog
@@ -1,3 +1,9 @@
+2015-11-16  Kirill Yukhin  <kirill.yukhin@intel.com>
+
+	* c-common.c (handle_simd_attribute): New.
+	(struct attribute_spec): Add entry for "simd".
+	(handle_simd_attribute): New.
+
 2015-11-13  Kai Tietz  <ktietz70@googlemail.com>
 
 	* c-lex.c (interpret_float): Use fold_convert.
diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c
index 89e978d..f8ccb6d 100644
--- a/gcc/c-family/c-common.c
+++ b/gcc/c-family/c-common.c
@@ -387,6 +387,7 @@ static tree handle_warn_unused_attribute (tree *, tree, tree, int, bool *);
 static tree handle_returns_nonnull_attribute (tree *, tree, tree, int, bool *);
 static tree handle_omp_declare_simd_attribute (tree *, tree, tree, int,
 					       bool *);
+static tree handle_simd_attribute (tree *, tree, tree, int, bool *);
 static tree handle_omp_declare_target_attribute (tree *, tree, tree, int,
 						 bool *);
 static tree handle_designated_init_attribute (tree *, tree, tree, int, bool *);
@@ -817,6 +818,8 @@ const struct attribute_spec c_common_attribute_table[] =
 			      handle_omp_declare_simd_attribute, false },
   { "cilk simd function",     0, -1, true,  false, false,
 			      handle_omp_declare_simd_attribute, false },
+  { "simd",		      0, 0, true,  false, false,
+			      handle_simd_attribute, false },
   { "omp declare target",     0, 0, true, false, false,
 			      handle_omp_declare_target_attribute, false },
   { "alloc_align",	      1, 1, false, true, true,
@@ -9021,6 +9024,35 @@ handle_omp_declare_simd_attribute (tree *, tree, tree, int, bool *)
   return NULL_TREE;
 }
 
+/* Handle a "simd" attribute.  */
+
+static tree
+handle_simd_attribute (tree *node, tree name, tree, int, bool *no_add_attrs)
+{
+  if (TREE_CODE (*node) == FUNCTION_DECL)
+    {
+      if (lookup_attribute ("cilk simd function",
+			    DECL_ATTRIBUTES (*node)) != NULL)
+	{
+	  error_at (DECL_SOURCE_LOCATION (*node),
+		    "%<__simd__%> attribute cannot be used in the same "
+		    "function marked as a Cilk Plus SIMD-enabled function");
+	  *no_add_attrs = true;
+	}
+      else
+	DECL_ATTRIBUTES (*node)
+	  = tree_cons (get_identifier ("omp declare simd"),
+		       NULL_TREE, DECL_ATTRIBUTES (*node));
+    }
+  else
+    {
+      warning (OPT_Wattributes, "%qE attribute ignored", name);
+      *no_add_attrs = true;
+    }
+
+  return NULL_TREE;
+}
+
 /* Handle an "omp declare target" attribute; arguments as in
    struct attribute_spec.handler.  */
 
diff --git a/gcc/c/ChangeLog b/gcc/c/ChangeLog
index ce4d7c0..3868771 100644
--- a/gcc/c/ChangeLog
+++ b/gcc/c/ChangeLog
@@ -1,3 +1,8 @@
+2015-11-16  Kirill Yukhin  <kirill.yukhin@intel.com>
+
+	* c-parser.c (c_finish_omp_declare_simd): Look for
+	"simd" attribute as well. Update error message.
+
 2015-11-14  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
 
 	* c-parser.c (c_parser_omp_declare_target): Adjust.
diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
index e470234..e63148e 100644
--- a/gcc/c/c-parser.c
+++ b/gcc/c/c-parser.c
@@ -16141,10 +16141,13 @@ c_finish_omp_declare_simd (c_parser *parser, tree fndecl, tree parms,
 			   vec<c_token> clauses)
 {
   if (flag_cilkplus
-      && clauses.exists () && !vec_safe_is_empty (parser->cilk_simd_fn_tokens))
+      && (clauses.exists ()
+	  || lookup_attribute ("simd", DECL_ATTRIBUTES (fndecl)))
+      && !vec_safe_is_empty (parser->cilk_simd_fn_tokens))
     {
-      error ("%<#pragma omp declare simd%> cannot be used in the same "
-	     "function marked as a Cilk Plus SIMD-enabled function");
+      error ("%<#pragma omp declare simd%> or %<simd%> attribute cannot be "
+	     "used in the same function marked as a Cilk Plus SIMD-enabled "
+	     "function");
       vec_free (parser->cilk_simd_fn_tokens);
       return;
     }
@@ -16182,6 +16185,16 @@ c_finish_omp_declare_simd (c_parser *parser, tree fndecl, tree parms,
       parser->tokens = parser->cilk_simd_fn_tokens->address ();
       parser->tokens_avail = vec_safe_length (parser->cilk_simd_fn_tokens);
       is_cilkplus_cilk_simd_fn = true;
+
+      if (lookup_attribute ("simd", DECL_ATTRIBUTES (fndecl)) != NULL)
+	{
+	  error_at (DECL_SOURCE_LOCATION (fndecl),
+		    "%<__simd__%> attribute cannot be used in the same "
+		    "function marked as a Cilk Plus SIMD-enabled function");
+	  vec_free (parser->cilk_simd_fn_tokens);
+	  return;
+	}
+
     }
   else
     {
@@ -16213,12 +16226,12 @@ c_finish_omp_declare_simd (c_parser *parser, tree fndecl, tree parms,
       if (c != NULL_TREE)
 	c = tree_cons (NULL_TREE, c, NULL_TREE);
       if (is_cilkplus_cilk_simd_fn) 
-	{ 
+	{
 	  tree k = build_tree_list (get_identifier ("cilk simd function"), 
 				    NULL_TREE);
 	  TREE_CHAIN (k) = DECL_ATTRIBUTES (fndecl);
 	  DECL_ATTRIBUTES (fndecl) = k;
-	} 
+	}
       c = build_tree_list (get_identifier ("omp declare simd"), c);
       TREE_CHAIN (c) = DECL_ATTRIBUTES (fndecl);
       DECL_ATTRIBUTES (fndecl) = c;
diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 322b693..7027d93 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,8 @@
+2015-11-16  Kirill Yukhin  <kirill.yukhin@intel.com>
+
+	* parser.c (cp_parser_late_parsing_cilk_simd_fn_info): Look for
+	"simd" attribute as well. Update error message.
+
 2015-11-14  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
 
 	* parser.c (cp_parser_omp_declare_target): Adjust.
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index 5e8614b..286c8db 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -35049,10 +35049,12 @@ cp_parser_late_parsing_cilk_simd_fn_info (cp_parser *parser, tree attrs)
   cp_omp_declare_simd_data *info = parser->cilk_simd_fn_info;
   int ii = 0;
 
-  if (parser->omp_declare_simd != NULL)
+  if (parser->omp_declare_simd != NULL
+      || lookup_attribute ("simd", attrs))
     {
-      error ("%<#pragma omp declare simd%> cannot be used in the same function"
-	     " marked as a Cilk Plus SIMD-enabled function");
+      error ("%<#pragma omp declare simd%> of %<simd%> attribute cannot be "
+	     "used in the same function marked as a Cilk Plus SIMD-enabled "
+	     " function");
       XDELETE (parser->cilk_simd_fn_info);
       parser->cilk_simd_fn_info = NULL;
       return attrs;
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 4d64e14..f5c2fdf 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -3143,6 +3143,22 @@ one compiled with @option{-msse4.1} and another with @option{-mavx}.
 At the function call it will create resolver @code{ifunc}, that will
 dynamically call a clone suitable for current architecture.
 
+@item simd
+@cindex @code{simd} function attribute.
+This attribute enables creation of one or more function versions that
+can process multiple arguments using SIMD instructions from a
+single invocation.  Specifying this attribute allows compiler to
+assume that such versions are available at link time (provided
+in the same or another translation unit).  Generated versions are
+target dependent and described in corresponding Vector ABI document.  For
+x86_64 target this document can be found
+@w{@uref{https://sourceware.org/glibc/wiki/libmvec?action=AttachFile&do=view&target=VectorABI.txt,here}}.
+The attribute should not be used together with Cilk Plus @code{vector}
+attribute on the same function.
+If the attribute is specified and @code{#pragma omp declare simd}
+present on a declaration and @code{-fopenmp} or @code{-fopenmp-simd}
+switch is specified, then the attribute is ignored.
+
 @item target (@var{options})
 @cindex @code{target} function attribute
 Multiple target back ends implement the @code{target} attribute
diff --git a/gcc/omp-low.c b/gcc/omp-low.c
index 58248d9..efcc971 100644
--- a/gcc/omp-low.c
+++ b/gcc/omp-low.c
@@ -18407,10 +18407,7 @@ public:
 bool
 pass_omp_simd_clone::gate (function *)
 {
-  return ((flag_openmp || flag_openmp_simd
-	   || flag_cilkplus
-	   || (in_lto_p && !flag_wpa))
-	  && (targetm.simd_clone.compute_vecsize_and_simdlen != NULL));
+  return targetm.simd_clone.compute_vecsize_and_simdlen != NULL;
 }
 
 } // anon namespace
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 82402bf..6b9370e 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2015-11-16  Kirill Yukhin  <kirill.yukhin@intel.com>
+
+	* c-c++-common/attr-simd.c: New test.
+	* c-c++-common/attr-simd-2.c: New test.
+	* c-c++-common/attr-simd-3.c: New test.
+
 2015-11-16  Alan Lawrence  <alan.lawrence@arm.com>
 
 	* gcc.target/aarch64/vclz.c: Correctly place INHIB_OPTIMIZATION.
diff --git a/gcc/testsuite/c-c++-common/attr-simd-2.c b/gcc/testsuite/c-c++-common/attr-simd-2.c
new file mode 100644
index 0000000..dd08d18
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/attr-simd-2.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-fdump-tree-optimized -fopenmp-simd" } */
+
+#pragma omp declare simd
+extern
+#ifdef __cplusplus
+"C"
+#endif
+__attribute__((__simd__))
+int simd_attr (void)
+{
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump "omp declare simd" "optimized" } } */
+/* { dg-final { scan-assembler-times "_ZGVbN4_simd_attr:" 1 { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-assembler-times "_ZGVbM4_simd_attr:" 1 { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-assembler-times "_ZGVcN4_simd_attr:" 1 { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-assembler-times "_ZGVcM4_simd_attr:" 1 { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-assembler-times "_ZGVdN8_simd_attr:" 1 { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-assembler-times "_ZGVdM8_simd_attr:" 1 { target { i?86-*-* x86_64-*-* } } } } */
diff --git a/gcc/testsuite/c-c++-common/attr-simd-3.c b/gcc/testsuite/c-c++-common/attr-simd-3.c
new file mode 100644
index 0000000..2bbdf04
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/attr-simd-3.c
@@ -0,0 +1,5 @@
+/* { dg-do compile } */
+/* { dg-options "-fcilkplus" } */
+/* { dg-prune-output "undeclared here \\(not in a function\\)|\[^\n\r\]* was not declared in this scope" } */
+
+void f () __attribute__((__simd__, __vector__)); /* { dg-error "in the same function marked as a Cilk Plus" } */
diff --git a/gcc/testsuite/c-c++-common/attr-simd.c b/gcc/testsuite/c-c++-common/attr-simd.c
new file mode 100644
index 0000000..61974e3
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/attr-simd.c
@@ -0,0 +1,38 @@
+/* { dg-do compile } */
+/* { dg-options "-fdump-tree-optimized" } */
+
+extern
+#ifdef __cplusplus
+"C"
+#endif
+__attribute__((__simd__))
+int simd_attr (void)
+{
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump "simd_attr\[ \\t\]simdclone|vector" "optimized" } } */
+/* { dg-final { scan-assembler-times "_ZGVbN4_simd_attr:" 1 { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-assembler-times "_ZGVbM4_simd_attr:" 1 { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-assembler-times "_ZGVcN4_simd_attr:" 1 { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-assembler-times "_ZGVcM4_simd_attr:" 1 { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-assembler-times "_ZGVdN8_simd_attr:" 1 { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-assembler-times "_ZGVdM8_simd_attr:" 1 { target { i?86-*-* x86_64-*-* } } } } */
+
+extern
+#ifdef __cplusplus
+"C"
+#endif
+__attribute__((simd))
+int simd_attr2 (void)
+{
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump "simd_attr2\[ \\t\]simdclone|vector" "optimized" } } */
+/* { dg-final { scan-assembler-times "_ZGVbN4_simd_attr2:" 1 { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-assembler-times "_ZGVbM4_simd_attr2:" 1 { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-assembler-times "_ZGVcN4_simd_attr2:" 1 { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-assembler-times "_ZGVcM4_simd_attr2:" 1 { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-assembler-times "_ZGVdN8_simd_attr2:" 1 { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-assembler-times "_ZGVdM8_simd_attr2:" 1 { target { i?86-*-* x86_64-*-* } } } } */