[ANNOUNCE] Linaro GCC 6 and 7 2017.06 source snapshots

[Yvan Roux]

The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2017.06
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 7.1+svn249190 and
includes performance improvements and bug fixes backported from mainline GCC.
The contents of this snapshot will be part of the 2017.08 stable[2] quarterly
release.

This snapshot tarball is available on:
http://snapshots.linaro.org/components/toolchain/gcc-linaro/7.1-2017.06/

Interesting changes in this GCC source package snapshot include:

* Updates to GCC 7.1+svn249190
* Backport of [Bugfix] [AArch32] PR target/71607 Fix ICE when loading constant
* Backport of [Bugfix] [AArch64] PR target/80671
config/aarch64/cortex-a57-fma-steering.c:416: bad statement order
* Backport of [Bugfix] PR tree-optimization/79697 unused realloc(0, n)
not eliminated
* Backport of [Bugfix] PR tree-optimization/80613 ICE in
is_gimple_reg_type with -O2
* Backport of [AArch32] Add a new target hook to compute the frame layout
* Backport of [AArch32] Add fuchsia support to libgcc
* Backport of [AArch32] FreeBSD arm libgcc config.host
* Backport of [AArch32] Model Cortex-A53 load forwarding
* Backport of [AArch64] Accept more addressing modes for PRFM
* Backport of [AArch64] Add aes and sha reservations for Thunderx2t99
* Backport of [AArch64] Add crc reservations for Thunderx2t99
* Backport of [AArch64] Improve float to int moves
* Backport of [AArch64] Set jump alignment to 4 for Cortex cores
* Backport of [AArch64] Tighten move constraints for symbolic operands
* Backport of [Misc] Check the alternate cost model just as costs_lt_p
* Backport of [Misc] Record equivalences for spill registers
* Backport of [Testsuite] [AArch32] Only test
tls-disable-literal-pool.c if target supports native TLS
* Backport of [Testsuite] [AArch32] Replace absolute line numbers in
gcc.target/arm
* Backport of [Testsuite] [AArch64] Replace absolute line numbers in
gcc.target/aarch64


o Linaro GCC 6 monthly snapshot[1] is based on FSF GCC 6.3+svn249140 and
includes performance improvements and bug fixes backported from mainline GCC.
This snapshot contents will be part of the 2017.08 stable[2] quarterly release.

This snapshot tarball is available on:
http://snapshots.linaro.org/components/toolchain/gcc-linaro/6.3-2017.06/

Interesting changes in this GCC source package snapshot include:

* Updates to GCC 6.3+svn249140


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
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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.