re PR c/80468 (ICE on invalid AVX512 code with -m32)

	PR c/80468
	* c-decl.c (finish_declspecs) <case cts_int_n>: If int_n_idx is not
	enabled, set specs->type to integer_type_node.

	* gcc.dg/pr80468.c: New test.

From-SVN: r247052

gcc/c/ChangeLog

+2017-04-21  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c/80468
+	* c-decl.c (finish_declspecs) <case cts_int_n>: If int_n_idx is not
+	enabled, set specs->type to integer_type_node.
+
 2017-04-03  Jonathan Wakely  <jwakely@redhat.com>
 
 	* c-array-notation.c: Fix typo in comment.

gcc/c/c-decl.c

@@ -10929,9 +10929,12 @@ finish_declspecs (struct c_declspecs *specs)
     case cts_int_n:
       gcc_assert (!specs->long_p && !specs->short_p && !specs->long_long_p);
       gcc_assert (!(specs->signed_p && specs->unsigned_p));
-      specs->type = (specs->unsigned_p
-		     ? int_n_trees[specs->int_n_idx].unsigned_type
-		     : int_n_trees[specs->int_n_idx].signed_type);
+      if (! int_n_enabled_p[specs->int_n_idx])
+	specs->type = integer_type_node;
+      else
+	specs->type = (specs->unsigned_p
+		       ? int_n_trees[specs->int_n_idx].unsigned_type
+		       : int_n_trees[specs->int_n_idx].signed_type);
       if (specs->complex_p)
 	{
 	  pedwarn (specs->locations[cdw_complex], OPT_Wpedantic,

gcc/testsuite/ChangeLog

+2017-04-21  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c/80468
+	* gcc.dg/pr80468.c: New test.
+
 2017-04-21  Martin Liska  <mliska@suse.cz>
 
 	PR tree-optimization/66278

gcc/testsuite/gcc.dg/pr80468.c

+/* PR c/80468 */
+/* { dg-do compile { target { ! int128 } } } */
+/* { dg-options "" } */
+
+void
+foo (void)
+{
+  __attribute__ ((__vector_size__ (4 * sizeof (unsigned)))) __int128 b;	/* { dg-error "is not supported on this target" } */
+  0 != b;
+}