Yvan Roux
2017-09-15 13:17:20 UTC
The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2017.09
snapshot of Linaro GCC 6 and 7 source packages.
o The GCC 7 series introduced an ABI change for ARM targets by fixing a bug
(present since GCC 5, see link below) that affects conformance to the procedure
call standard (AAPCS). The bug affects some C++ code where class objects are
passed by value to functions and could result in incorrect or inconsistent code
being generated. If the option -Wpsabi is enabled (on by default) the compiler
will emit a diagnostic note for code that might be affected by this ABI change.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77728
For an explanation of the changes please see the following website:
https://gcc.gnu.org/gcc-7/changes.html
o Linaro GCC 7 monthly snapshot[1] is based on FSF GCC 7.2+svn252337 and
includes performance improvements and bug fixes backported from mainline GCC.
The contents of this snapshot will be part of the 2017.11 stable[2] quarterly
release.
This snapshot tarball is available on:
http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.2-2017.09/
Interesting changes in this GCC source package snapshot include:
* Updates to GCC 7.2+svn252337
* Backports from mainline:
- Backport of [Bugfix] [AArch32] PR target/77308 surprisingly large
stack usage for sha512 on arm
- Backport of [AArch32] Fix ldrd offsets
- Backport of [AArch32] Remove %? string from some Advanced SIMD patterns
- Backport of [AArch64] Add optimized implementation of mersenne twister
- Backport of [AArch64] Add RDMA support to falkor port
- Backport of [AArch64] Fix big endian float immediate moves
- Backport of [AArch64] Fix missing optimization for CMP+AND
- Backport of [AArch64] Fix pattern guard relaxations that are
allowing more constants than they should
- Backport of [AArch64] Fix ThunderX fp vectorizer cost model
- Backport of [AArch64] Generate MLA when multiply + add vector by scalar
- Backport of [AArch64] Implement ALU_BRANCH fusion
- Backport of [AArch64] Improve aarch64 conditional compare usage
- Backport of [AArch64] Improve thunderx_vect_cost some more
- Backport of [AArch64] Move the check for any_condjump_p from
sched-deps to target macros
- Backport of [AArch64] Only allow 0s unconditionally for floating
point values
- Backport of [AArch64] Optimize float immediate moves-HF/DF/SF mode
- Backport of [AArch64] Optimize float immediate moves-infrastructure
- Backport of [AArch64] Optimize float immediate moves-testsuite
- Backport of [AArch64] Optimize integer immediate moves with partial masks
- Backport of [Tesstuite] Fix dg-require-stack-check
- Backport of [Testsuite] [AArch32] Add -mfloat-abi=hard to arm_neon_ok
- Backport of [Testsuite] [AArch64] Fix dbl_mov_immediate_1.c test
- Backport of [Testsuite] [AArch64] gcc.target/aarch64/ccmp_2.c: New test
- Backport of [Cleanup] [AArch32] PR target/68535 arm.c: 5 * set but not used
- Backport of [Doc] [AArch64] Clean up AArch64 options
o Linaro GCC 6 monthly snapshot[1] is based on FSF GCC 6.4+svn252072 and
includes performance improvements and bug fixes backported from mainline GCC.
This snapshot contents will be part of the next maintenance release.
This snapshot tarball is available on:
http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.4-2017.09/
Interesting changes in this GCC source package snapshot include:
* Updates to GCC 6.4+svn252072
o Subscribe to the important Linaro mailing lists and join our IRC channels to
stay on top of Linaro development.
** Linaro Toolchain Development "mailing list":
http://lists.linaro.org/mailman/listinfo/linaro-toolchain
** Linaro Toolchain IRC channel on irc.freenode.net at @#linaro-tcwg@
* Bug reports should be filed in bugzilla against GCC product:
http://bugs.linaro.org/enter_bug.cgi?product=GCC
* Interested in commercial support? inquire at "Linaro support":
mailto:***@linaro.org
[1]. Source package snapshots are defined when the compiler is only
put through unit-testing and full validation is not performed.
[2]. Stable source package releases are defined as releases where the
full Linaro Toolchain validation plan is executed.
snapshot of Linaro GCC 6 and 7 source packages.
o The GCC 7 series introduced an ABI change for ARM targets by fixing a bug
(present since GCC 5, see link below) that affects conformance to the procedure
call standard (AAPCS). The bug affects some C++ code where class objects are
passed by value to functions and could result in incorrect or inconsistent code
being generated. If the option -Wpsabi is enabled (on by default) the compiler
will emit a diagnostic note for code that might be affected by this ABI change.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77728
For an explanation of the changes please see the following website:
https://gcc.gnu.org/gcc-7/changes.html
o Linaro GCC 7 monthly snapshot[1] is based on FSF GCC 7.2+svn252337 and
includes performance improvements and bug fixes backported from mainline GCC.
The contents of this snapshot will be part of the 2017.11 stable[2] quarterly
release.
This snapshot tarball is available on:
http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.2-2017.09/
Interesting changes in this GCC source package snapshot include:
* Updates to GCC 7.2+svn252337
* Backports from mainline:
- Backport of [Bugfix] [AArch32] PR target/77308 surprisingly large
stack usage for sha512 on arm
- Backport of [AArch32] Fix ldrd offsets
- Backport of [AArch32] Remove %? string from some Advanced SIMD patterns
- Backport of [AArch64] Add optimized implementation of mersenne twister
- Backport of [AArch64] Add RDMA support to falkor port
- Backport of [AArch64] Fix big endian float immediate moves
- Backport of [AArch64] Fix missing optimization for CMP+AND
- Backport of [AArch64] Fix pattern guard relaxations that are
allowing more constants than they should
- Backport of [AArch64] Fix ThunderX fp vectorizer cost model
- Backport of [AArch64] Generate MLA when multiply + add vector by scalar
- Backport of [AArch64] Implement ALU_BRANCH fusion
- Backport of [AArch64] Improve aarch64 conditional compare usage
- Backport of [AArch64] Improve thunderx_vect_cost some more
- Backport of [AArch64] Move the check for any_condjump_p from
sched-deps to target macros
- Backport of [AArch64] Only allow 0s unconditionally for floating
point values
- Backport of [AArch64] Optimize float immediate moves-HF/DF/SF mode
- Backport of [AArch64] Optimize float immediate moves-infrastructure
- Backport of [AArch64] Optimize float immediate moves-testsuite
- Backport of [AArch64] Optimize integer immediate moves with partial masks
- Backport of [Tesstuite] Fix dg-require-stack-check
- Backport of [Testsuite] [AArch32] Add -mfloat-abi=hard to arm_neon_ok
- Backport of [Testsuite] [AArch64] Fix dbl_mov_immediate_1.c test
- Backport of [Testsuite] [AArch64] gcc.target/aarch64/ccmp_2.c: New test
- Backport of [Cleanup] [AArch32] PR target/68535 arm.c: 5 * set but not used
- Backport of [Doc] [AArch64] Clean up AArch64 options
o Linaro GCC 6 monthly snapshot[1] is based on FSF GCC 6.4+svn252072 and
includes performance improvements and bug fixes backported from mainline GCC.
This snapshot contents will be part of the next maintenance release.
This snapshot tarball is available on:
http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.4-2017.09/
Interesting changes in this GCC source package snapshot include:
* Updates to GCC 6.4+svn252072
o Subscribe to the important Linaro mailing lists and join our IRC channels to
stay on top of Linaro development.
** Linaro Toolchain Development "mailing list":
http://lists.linaro.org/mailman/listinfo/linaro-toolchain
** Linaro Toolchain IRC channel on irc.freenode.net at @#linaro-tcwg@
* Bug reports should be filed in bugzilla against GCC product:
http://bugs.linaro.org/enter_bug.cgi?product=GCC
* Interested in commercial support? inquire at "Linaro support":
mailto:***@linaro.org
[1]. Source package snapshots are defined when the compiler is only
put through unit-testing and full validation is not performed.
[2]. Stable source package releases are defined as releases where the
full Linaro Toolchain validation plan is executed.