Do not save/restore regs in ClinitCheck slow path.
The entrypoint is kSaveEverything, so the only register that
needs to be saved is the argument/return value register.
The size of the aosp_taimen-userdebug prebuilts:
- before:
arm/boot*.oat: 16811692
arm64/boot*.oat: 19801032
oat/arm64/services.odex: 20232208
- after:
arm/boot*.oat: 16798804 (-12.6KiB, -0.08%)
arm64/boot*.oat: 19804392 (+3.3KiB, +0.02%)
oat/arm64/services.odex: 20227784 (-4.3KiB, -0.02%)
Note that though there is less code, the metadata for the
arm64/boot*.oat outweighs the code size reduction because of
the register map encoding as value+shift introduced in
https://android-review.googlesource.com/695682
which it's ill-suited for kSaveEverything entrypoints. We
should reconsider that encoding.
Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Test: Pixel 2 XL boots.
Test: testrunner.py --target --optimizing
Change-Id: I5cd1deb90332a3b88a0a59d87925c557d9bff1ab
6 files changed