[Bug middle-end/55438] [4.8 Regression]: tmpdir-gcc.dg-struct-layout-1/t001 - t028, gcc.c-torture/execute/991118-1.c, gcc.c-torture/execute/bf64-1.c, ICE

[rsandifo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55438

--- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> 2012-11-28 20:13:39 UTC ---
Author: rsandifo
Date: Wed Nov 28 20:13:22 2012
New Revision: 193905

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193905
Log:
gcc/
    PR middle-end/55438
    * expmed.c (simple_mem_bitfield_p): New function, extracted from
    store_bit_field_1 and extract_bit_field_1.  Use GET_MODE_ALIGNMENT
    rather than bitsize when checking the alignment.
    (store_bit_field_1, extract_bit_field_1): Call it.
    * stor-layout.c (bit_field_mode_iterator::bit_field_mode_iterator):
    Don't limit ALIGN_.  Assume that memory is mapped in chunks of at
    least word size, regardless of BIGGEST_ALIGNMENT.
    (bit_field_mode_iterator::get_mode): Use GET_MODE_ALIGNMENT rather
    than unit when checking the alignment.
    (get_best_mode): Use GET_MODE_ALIGNMENT.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/expmed.c
    trunk/gcc/stor-layout.c