[Bug middle-end/51200] Wrong code sequence to store restrict volatile bitfield

["jye2 at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51200

--- Comment #7 from jye2 at gcc dot gnu.org 2012-03-29 02:15:37 UTC ---
Author: jye2
Date: Thu Mar 29 02:15:29 2012
New Revision: 185944

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=185944
Log:
2012-03-28  Joey Ye  <joey.ye@arm.com>

    Backported from mainline
    2011-12-20  Bernd Schmidt  <bernds@codesourcery.com>

    PR middle-end/51200
    * expr.c (store_field): Avoid a direct store if the mode is larger
    than the size of the bit field.
    * stor-layout.c (layout_decl): If flag_strict_volatile_bitfields,
    treat non-volatile bit fields like volatile ones.
    * toplev.c (process_options): Disallow combination of
    -fstrict-volatile-bitfields and ABI versions less than 2.
    * config/arm/arm.c (arm_option_override): Don't enable
    flag_strict_volatile_bitfields if the ABI version is less than 2.
    * config/h8300/h8300.c (h8300_option_override): Likewise.
    * config/rx/rx.c (rx_option_override): Likewise.
    * config/m32c/m32c.c (m32c_option_override): Likewise.
    * config/sh/sh.c (sh_option_override): Likewise.

    2011-12-22  Joey Ye  <joey.ye@arm.com>

    * toplev.c (process_options): Fix typo.

testcases:

    Backported from mainline
    2011-12-20  Bernd Schmidt  <bernds@codesourcery.com>

    PR middle-end/51200
    * gcc.target/arm/volatile-bitfields-4.c: New test.
    * c-c++-common/abi-bf.c: New test.

    2011-12-26  Joey Ye  <joey.ye@arm.com>

    PR middle-end/51200
    * gcc.dg/volatile-bitfields-2.c: New test.


Added:
    branches/gcc-4_6-branch/gcc/testsuite/c-c++-common/abi-bf.c
    branches/gcc-4_6-branch/gcc/testsuite/gcc.dg/volatile-bitfields-2.c
    branches/gcc-4_6-branch/gcc/testsuite/gcc.target/arm/volatile-bitfields-4.c
Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/config/arm/arm.c
    branches/gcc-4_6-branch/gcc/config/h8300/h8300.c
    branches/gcc-4_6-branch/gcc/config/m32c/m32c.c
    branches/gcc-4_6-branch/gcc/config/rx/rx.c
    branches/gcc-4_6-branch/gcc/config/sh/sh.c
    branches/gcc-4_6-branch/gcc/expr.c
    branches/gcc-4_6-branch/gcc/stor-layout.c
    branches/gcc-4_6-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_6-branch/gcc/toplev.c