re PR c++/68001 ([cilkplus] ICE in cp_gimplify_expr, at cp/cp-gimplify.c:760)

PR c++/68001

gcc/c-family
	PR c++/68001
	* c-gimplify.c (c_gimplify_expr): Stop the process if see an error.
	* cilk.c (recognize_spawn): Determine location in a more precise
	way.
gcc/cp
	* cp-gimplify.c (cp_gimplify_expr): Stop the process if see an error.
gcc/testsuite
	* g++.dg/cilk-plus/CK/pr68001.cc: New test.

From-SVN: r230755

gcc/c-family/ChangeLog

+2015-11-23  Igor Zamyatin  <igor.zamyatin@intel.com>
+
+	PR c++/68001
+	* c-gimplify.c (c_gimplify_expr): Stop the process if see an error.
+	* cilk.c (recognize_spawn): Determine location in a more precise
+	way.
+
 2015-11-19  Jason Merrill  <jason@redhat.com>
 
 	* c-common.c (shorten_compare): But look through macros from

gcc/c-family/c-gimplify.c

@@ -272,16 +272,16 @@ c_gimplify_expr (tree *expr_p, gimple_seq *pre_p ATTRIBUTE_UNUSED,
       }
 
     case CILK_SPAWN_STMT:
-      gcc_assert
-	(fn_contains_cilk_spawn_p (cfun)
-	 && cilk_detect_spawn_and_unwrap (expr_p));
+      gcc_assert(fn_contains_cilk_spawn_p (cfun)
+		 && cilk_detect_spawn_and_unwrap (expr_p));
 
-      /* If errors are seen, then just process it as a CALL_EXPR.  */
       if (!seen_error ())
 	{
 	  cilk_gimplify_call_params_in_spawned_fn (expr_p, pre_p, post_p);
 	  return (enum gimplify_status) gimplify_cilk_spawn (expr_p);
 	}
+      return GS_ERROR;
+
     case MODIFY_EXPR:
     case INIT_EXPR:
     case CALL_EXPR:

gcc/c-family/cilk.c

@@ -33,7 +33,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "gimplify.h"
 #include "tree-iterator.h"
 #include "tree-inline.h"
-#include "toplev.h" 
+#include "toplev.h"
 #include "calls.h"
 #include "cilk.h"
 
@@ -76,6 +76,7 @@ struct wrapper_data
   tree block;
 };
 
+static tree contains_cilk_spawn_stmt_walker (tree *tp, int *, void *);
 static void extract_free_variables (tree, struct wrapper_data *,
 				    enum add_variable_type);
 static HOST_WIDE_INT cilk_wrapper_count;
@@ -235,7 +236,19 @@ recognize_spawn (tree exp, tree *exp0)
     }
   /* _Cilk_spawn can't be wrapped in expression such as PLUS_EXPR.  */
   else if (contains_cilk_spawn_stmt (exp))
-    error_at (EXPR_LOCATION (exp), "invalid use of %<_Cilk_spawn%>");
+    {
+      location_t loc = EXPR_LOCATION (exp);
+      if (loc == UNKNOWN_LOCATION)
+	{
+	  tree stmt = walk_tree (&exp,
+				 contains_cilk_spawn_stmt_walker,
+				 NULL,
+				 NULL);
+	  gcc_assert (stmt != NULL_TREE);
+	  loc = EXPR_LOCATION (stmt);
+	}
+      error_at (loc, "invalid use of %<_Cilk_spawn%>");
+    }
   return spawn_found;
 }
 

gcc/cp/ChangeLog

+2015-11-23  Igor Zamyatin  <igor.zamyatin@intel.com>
+
+	PR c++/68001
+	* cp-gimplify.c (cp_gimplify_expr): Stop the process if see an error.
+
 2015-11-20  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/67354

gcc/cp/cp-gimplify.c

@@ -611,12 +611,14 @@ cp_gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
 	 25979.  */
     case INIT_EXPR:
       if (fn_contains_cilk_spawn_p (cfun)
-	  && cilk_detect_spawn_and_unwrap (expr_p)
-	  && !seen_error ())
+	  && cilk_detect_spawn_and_unwrap (expr_p))
 	{
 	  cilk_cp_gimplify_call_params_in_spawned_fn (expr_p, pre_p, post_p);
 	  return (enum gimplify_status) gimplify_cilk_spawn (expr_p);
 	}
+      if (seen_error ())
+	return GS_ERROR;
+
       cp_gimplify_init_expr (expr_p);
       if (TREE_CODE (*expr_p) != INIT_EXPR)
 	return GS_OK;
@@ -725,16 +727,16 @@ cp_gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
       break;
 
     case CILK_SPAWN_STMT:
-      gcc_assert 
-	(fn_contains_cilk_spawn_p (cfun) 
-	 && cilk_detect_spawn_and_unwrap (expr_p));
+      gcc_assert(fn_contains_cilk_spawn_p (cfun)
+		 && cilk_detect_spawn_and_unwrap (expr_p));
 
-      /* If errors are seen, then just process it as a CALL_EXPR.  */
       if (!seen_error ())
 	{
 	  cilk_cp_gimplify_call_params_in_spawned_fn (expr_p, pre_p, post_p);
 	  return (enum gimplify_status) gimplify_cilk_spawn (expr_p);
 	}
+      return GS_ERROR;
+
     case CALL_EXPR:
       if (fn_contains_cilk_spawn_p (cfun)
 	  && cilk_detect_spawn_and_unwrap (expr_p)

gcc/testsuite/ChangeLog

+2015-11-23  Igor Zamyatin  <igor.zamyatin@intel.com>
+
+	PR c++/68001
+	* g++.dg/cilk-plus/CK/pr68001.cc: New test.
+
 2015-11-23  Richard Biener  <rguenther@suse.de>
 	    Jiong Wang  <jiong.wang@arm.com>
 

gcc/testsuite/g++.dg/cilk-plus/CK/pr68001.cc

+/* PR middle-end/68001 */
+/* { dg-do compile } */
+/* { dg-options "-fcilkplus" } */
+
+#include <vector>
+
+std::vector<double> f() {
+  std::vector<double> v;
+  return v;
+}
+
+int main()
+{
+  std::vector<double> x = _Cilk_spawn f(); /* { dg-error "invalid use of" } */
+  std::vector<double> y = f();
+  _Cilk_sync;
+  return 0;
+}