------- Comment #2 from ubizjak at gmail dot com 2009-12-21 19:36 -------
This happens on !TARGET_BWX targets. Unaligned HImode access can cross widened
SImode boundaries. Following patch triggers on this invalid condition in
get_aligned_mem:
Index: alpha.c
===================================================================
--- alpha.c (revision 155372)
+++ alpha.c (working copy)
@@ -1475,6 +1475,10 @@ get_aligned_mem (rtx ref, rtx *paligned_
else
offset = disp & 3;
+ /* The location should not cross aligned word boundary. */
+ gcc_assert (offset + GET_MODE_SIZE (GET_MODE (ref))
+ <= GET_MODE_SIZE (SImode));
+
/* Access the entire aligned word. */
*paligned_mem = widen_memory_access (ref, SImode, -offset);
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42448
