Don't ICE on vectors of enums (PR 87286)

We've traditionally allowed vectors of enums (not sure if that's
deliberate) but vector_types_compatible_elements_p checked for
INTEGER_TYPE rather than INTEGRAL_TYPE_P.

2018-10-08  Richard Sandiford  <richard.sandiford@arm.com>

gcc/c-family/
	PR c/87286
	* c-common.c (vector_types_compatible_elements_p): Use
	INTEGRAL_TYPE_P instead of checking only for INTEGER_TYPE.

gcc/testsuite/
	PR c/87286
	* gcc.dg/pr87286.c: New test.

From-SVN: r264913

gcc/c-family/ChangeLog

+2018-10-08  Richard Sandiford  <richard.sandiford@arm.com>
+
+	PR c/87286
+	* c-common.c (vector_types_compatible_elements_p): Use
+	INTEGRAL_TYPE_P instead of checking only for INTEGER_TYPE.
+
 2018-10-04  Vinay Kumar  <vinay.kumar@blackfigtech.com>
 
 	* c-attribs.c (get_priority): Add a warning flag warn_prio_ctor_dtor

gcc/c-family/c-common.c

@@ -7465,8 +7465,11 @@ vector_types_compatible_elements_p (tree t1, tree t2)
 
   enum tree_code c1 = TREE_CODE (t1), c2 = TREE_CODE (t2);
 
-  gcc_assert ((c1 == INTEGER_TYPE || c1 == REAL_TYPE || c1 == FIXED_POINT_TYPE)
-	      && (c2 == INTEGER_TYPE || c2 == REAL_TYPE
+  gcc_assert ((INTEGRAL_TYPE_P (t1)
+	       || c1 == REAL_TYPE
+	       || c1 == FIXED_POINT_TYPE)
+	      && (INTEGRAL_TYPE_P (t2)
+		  || c2 == REAL_TYPE
 		  || c2 == FIXED_POINT_TYPE));
 
   t1 = c_common_signed_type (t1);
@@ -7476,7 +7479,7 @@ vector_types_compatible_elements_p (tree t1, tree t2)
   if (t1 == t2)
     return true;
   if (opaque && c1 == c2
-      && (c1 == INTEGER_TYPE || c1 == REAL_TYPE)
+      && (INTEGRAL_TYPE_P (t1) || c1 == REAL_TYPE)
       && TYPE_PRECISION (t1) == TYPE_PRECISION (t2))
     return true;
   return false;

gcc/testsuite/ChangeLog

+2018-10-08  Richard Sandiford  <richard.sandiford@arm.com>
+
+	PR c/87286
+	* gcc.dg/pr87286.c: New test.
+
 2018-10-06  Thomas Koenig  <tkoenig@gcc.gnu.org>
 
 	PR fortran/86111

gcc/testsuite/gcc.dg/pr87286.c

+enum foo { F };
+typedef enum foo vec_foo __attribute__((vector_size (16)));
+vec_foo add (vec_foo x, vec_foo y) { return x + y; }