tree-optimization/98381 - fix live bool vector extract

This fixes extraction of live bool vector results for the case of
integer mode vectors.

2021-01-05  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/98381
	* tree.c (vector_element_bits): Properly compute bool vector
	element size.
	* tree-vect-loop.c (vectorizable_live_operation): Properly
	compute the last lane bit offset.

1 files changed, 7 insertions, 2 deletions

diff --git a/gcc/tree.c b/gcc/tree.c
index 421a2b4..e0a1d512 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -14021,8 +14021,13 @@ vector_element_bits (const_tree type)
 {
   gcc_checking_assert (VECTOR_TYPE_P (type));
   if (VECTOR_BOOLEAN_TYPE_P (type))
-    return vector_element_size (tree_to_poly_uint64 (TYPE_SIZE (type)),
-				TYPE_VECTOR_SUBPARTS (type));
+    {
+      if (VECTOR_MODE_P (TYPE_MODE (type)))
+	return vector_element_size (tree_to_poly_uint64 (TYPE_SIZE (type)),
+				    TYPE_VECTOR_SUBPARTS (type));
+      else
+	return 1;
+    }
   return tree_to_uhwi (TYPE_SIZE (TREE_TYPE (type)));
 }