------- Comment #5 from rguenth at gcc dot gnu dot org 2009-12-17 11:23 -------
I can reproduce it on i?86-linux with an extra assert.
Index: gcc/expr.c
===================================================================
--- gcc/expr.c (revision 155297)
+++ gcc/expr.c (working copy)
@@ -1194,6 +1194,7 @@ emit_block_move_hints (rtx x, rtx y, rtx
}
align = MIN (MEM_ALIGN (x), MEM_ALIGN (y));
+ gcc_assert (align >= BITS_PER_UNIT);
gcc_assert (MEM_P (x));
gcc_assert (MEM_P (y));
the testcase is sort-of invalid as it stores to a CONST_DECL via a memcpy.
But it's only undefined at runtime so we shouldn't ICE here. CONST_DECLs
are given 1 as alignment appearantly which is sort-of bogus - they
should get the alignment of the mode or at least BITS_PER_UNIT and
get_object_alignment doesn't honor that.
I have a patch.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |rguenth at gcc dot gnu dot
|dot org |org
Status|UNCONFIRMED |ASSIGNED
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2009-12-17 11:23:50
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42397
