[Bug target/47855] missed cbnz optimization

[jye2 at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47855

--- Comment #4 from jye2 at gcc dot gnu.org 2011-09-22 06:41:49 UTC ---
Author: jye2
Date: Thu Sep 22 06:41:44 2011
New Revision: 179077

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=179077
Log:
2011-09-22  Joey Ye  <joey.ye@arm.com>

    Backport r178852 from mainline
    2011-09-14  Julian Brown  <julian@codesourcery.com>

    * config/arm/arm.c (arm_override_options): Add unaligned_access
    support.
    (arm_file_start): Emit attribute for unaligned access as appropriate.
    * config/arm/arm.md (UNSPEC_UNALIGNED_LOAD)
    (UNSPEC_UNALIGNED_STORE): Add constants for unspecs.
    (insv, extzv): Add unaligned-access support.
    (extv): Change to expander. Likewise.
    (extzv_t1, extv_regsi): Add helpers.
    (unaligned_loadsi, unaligned_loadhis, unaligned_loadhiu)
    (unaligned_storesi, unaligned_storehi): New.
    (*extv_reg): New (previous extv implementation).
    * config/arm/arm.opt (munaligned_access): Add option.
    * config/arm/constraints.md (Uw): New constraint.
    * expmed.c (store_bit_field_1): Adjust bitfield numbering according
    to size of access, not size of unit, when BITS_BIG_ENDIAN !=
    BYTES_BIG_ENDIAN. Don't use bitfield accesses for
    volatile accesses when -fstrict-volatile-bitfields is in effect.
    (extract_bit_field_1): Likewise.

    Backport r172697 from mainline
    2011-04-19  Wei Guozhi  <carrot@google.com>

    PR target/47855
    * config/arm/arm-protos.h (thumb1_legitimate_address_p): New prototype.
    * config/arm/arm.c (thumb1_legitimate_address_p): Remove the static
    linkage.
    * config/arm/constraints.md (Uu): New constraint.
    * config/arm/arm.md (*arm_movqi_insn): Compute attr "length".

Modified:
    branches/ARM/embedded-4_6-branch/gcc/ChangeLog.arm
    branches/ARM/embedded-4_6-branch/gcc/config/arm/arm-protos.h
    branches/ARM/embedded-4_6-branch/gcc/config/arm/arm.c
    branches/ARM/embedded-4_6-branch/gcc/config/arm/arm.md
    branches/ARM/embedded-4_6-branch/gcc/config/arm/arm.opt
    branches/ARM/embedded-4_6-branch/gcc/config/arm/constraints.md
    branches/ARM/embedded-4_6-branch/gcc/expmed.c