------- Comment #6 from amodra at bigpond dot net dot au 2005-11-21 07:08
-------
Testing a fix. The reason gcc-3.3 doesn't fail on this testcase is that the
first arg to store_bit_field there is a mem:BLK while gcc-3.4 and gcc-4 pass a
mem:SI. Code after the following comment in store_bit_field fails badly,
trying to insert a 64-bit field into an SImode reg.
/* Get the mode to use for inserting into this field. If OP0 is
BLKmode, get the smallest mode consistent with the alignment. If
OP0 is a non-BLKmode object that is no wider than MAXMODE, use its
mode. Otherwise, use the smallest mode containing the field. */
I think we just need to check that bestmode is at least as big as fieldmode.
This will prevent trying to use insv, and fall thru to store_fixed_bit_field,
which is what happens with a BLKmode MEM.
--
amodra at bigpond dot net dot au changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |amodra at bigpond dot net
|dot org |dot au
Status|NEW |ASSIGNED
Last reconfirmed|2005-11-21 01:53:20 |2005-11-21 07:08:37
date| |
Target Milestone|4.0.3 |---
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24950
