1 files changed, 3 insertions, 0 deletions
diff --git a/gcc/expr.c b/gcc/expr.c
index e8c3ab5..9239c4a 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -4492,7 +4492,10 @@ store_constructor_field (rtx target, unsigned HOST_WIDE_INT bitsize,
 			 tree exp, tree type, int cleared, int alias_set)
 {
   if (TREE_CODE (exp) == CONSTRUCTOR
+      /* We can only call store_constructor recursively if the size and
+	 bit position are on a byte boundary.  */
       && bitpos % BITS_PER_UNIT == 0
+      && (bitsize > 0 && bitsize % BITS_PER_UNIT == 0)
       /* If we have a nonzero bitpos for a register target, then we just
 	 let store_field do the bitfield handling.  This is unlikely to
 	 generate unnecessary clear instructions anyways.  */