tree 15e049245f5d75eb9a753345a51aa6b4f08853ca
parent 9486e99114a0a3faa4ac9ee177222db8cee45a15
author Vyacheslav Egorov <vegorov@google.com> 1557139688 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1557139688 +0000

[vm/compiler] Instroduce SIMARM_X64 build architecture.

This is variant of SIMARM build (ARM target and non-ARM host) but with a
word size mismatch (32-bit target and 64-bit host). We only expect to
build gen_snapshot binary in this mode.

This is the first step towards enabling AOT compilation targeting ARM
using 64-bit gen_snapshot binary.

This change also introduces --gen-snapshot flag for test.py which allows
to specify which gen_snapshot binary should be used for running tests.

Expected workflow with SIMARM_X64 build:

$ tools/build.py -a simarm_x64 -m release gen_snapshot
$ tools/build.py -a simarm -m release dart_precompiled_runtime
vm_platform
$ tools/test.py -a simarm -m release -c dartkp --gen-snapshot
out/ReleaseSIMARM_X64/gen_snapshot

Note that our ARM simulator can't be built as a 64-binary so we are
going to be using SIMARM runtime to test AOT compiled code produced by
SIMARM_X64 binary.

Issue https://github.com/dart-lang/sdk/issues/36839
Issue https://github.com/flutter/flutter/issues/22598

Change-Id: Id003900e8b46fc9d57975ab82b0c21852a176079
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/100968
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>