[Bug middle-end/59134] [4.7/4.8/4.9 regression] infinite loop between store_fixed_bit_field and store_split_bit_field with STRICT_ALIGNMENT

[edlinger at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59134

--- Comment #5 from edlinger at gcc dot gnu.org ---
Author: edlinger
Date: Wed Dec 11 17:09:17 2013
New Revision: 205898

URL: http://gcc.gnu.org/viewcvs?rev=205898&root=gcc&view=rev
Log:
2013-12-11  Bernd Edlinger  <bernd.edlin...@hotmail.de>

        PR middle-end/59134
        * expmed.c (store_bit_field): Use narrow_bit_field_mem and
        store_fixed_bit_field_1 for -fstrict-volatile-bitfields.
        (store_fixed_bit_field): Split up.  Call store_fixed_bit_field_1
        to do the real work.
        (store_fixed_bit_field_1): New function.
        (store_split_bit_field): Limit the unit size to the memory mode size,
        to prevent recursion.

testsuite:
        * gcc.c-torture/compile/pr59134.c: New test.
        * gnat.dg/misaligned_volatile.adb: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr59134.c
    trunk/gcc/testsuite/gnat.dg/misaligned_volatile.adb
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/expmed.c
    trunk/gcc/testsuite/ChangeLog