[Bug target/80082] [5/6 regression] GCC incorrectly assumes Cortex-r[578] have 64-bit single-copy atomic LDRD

["thopre01 at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80082

--- Comment #11 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Author: thopre01
Date: Tue Apr 11 15:26:20 2017
New Revision: 246844

URL: https://gcc.gnu.org/viewcvs?rev=246844&root=gcc&view=rev
Log:
Fix PR80082: LDRD erronously used for 64bit load on ARMv7-R

2017-04-11  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    Backport from GCC 6
    2017-04-06  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    PR target/80082
    * config/arm/arm-protos.h (FL_LPAE): Define macro.
    (FL_FOR_ARCH7VE): Add FL_LPAE.
    (arm_arch_lpae): Declare extern.
    * config/arm/arm.c (arm_arch_lpae): Declare.
    (arm_option_override): Define arm_arch_lpae.
    * config/arm/arm.h (TARGET_HAVE_LPAE): Redefine in term of
    arm_arch_lpae.

    gcc/testsuite/
    PR target/80082
    * gcc.target/arm/atomic_loaddi_10.c: New testcase.
    * gcc.target/arm/atomic_loaddi_11.c: Likewise.

Added:
    branches/gcc-5-branch/gcc/testsuite/gcc.target/arm/atomic_loaddi_10.c
    branches/gcc-5-branch/gcc/testsuite/gcc.target/arm/atomic_loaddi_11.c
Modified:
    branches/gcc-5-branch/gcc/ChangeLog
    branches/gcc-5-branch/gcc/config/arm/arm-protos.h
    branches/gcc-5-branch/gcc/config/arm/arm.c
    branches/gcc-5-branch/gcc/config/arm/arm.h
    branches/gcc-5-branch/gcc/testsuite/ChangeLog