re PR middle-end/68066 (ICE in max_value, at wide-int.cc)

gcc/

	PR middle-end/68066
	* tree.c (build_truth_vector_type): Support BLK mode
	returned for boolean vector.

From-SVN: r229256

gcc/ChangeLog

+2015-10-23  Ilya Enkovich  <enkovich.gnu@gmail.com>
+
+	PR middle-end/68066
+	* tree.c (build_truth_vector_type): Support BLK mode
+	returned for boolean vector.
+
 2015-10-23  Alan Hayward <alan.hayward@arm.com>
 
 	PR tree-optimization/65947

gcc/tree.c

@@ -10671,8 +10671,14 @@ build_truth_vector_type (unsigned nunits, unsigned vector_size)
 
   gcc_assert (mask_mode != VOIDmode);
 
-  unsigned HOST_WIDE_INT esize = GET_MODE_BITSIZE (mask_mode) / nunits;
-  gcc_assert (esize * nunits == GET_MODE_BITSIZE (mask_mode));
+  unsigned HOST_WIDE_INT vsize;
+  if (mask_mode == BLKmode)
+    vsize = vector_size * BITS_PER_UNIT;
+  else
+    vsize = GET_MODE_BITSIZE (mask_mode);
+
+  unsigned HOST_WIDE_INT esize = vsize / nunits;
+  gcc_assert (esize * nunits == vsize);
 
   tree bool_type = build_nonstandard_boolean_type (esize);