tree 9ae79f8fad2c505a7b7ecabd384c6d80147dc5bf
parent ac1bf656c4c2c291bf2cb6d2027f191290d15792
author Martin Kustermann <kustermann@google.com> 1547747632 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1547747632 +0000

[VM/Compiler/AOT] Bare instructions 8: Improve AOT code by using pc-relative calls

This CL improves AOT code for StackOverflowInstr/CheckNullInstr:

  * On ARM we can do a conditional pc-relative calls for the stack overflow
    checks, getting rid of the slow-paths entirely.

  * On ARM64 we can do pc-relative calls on the slow path, avoiding an
    extra load.

Flutter gallery size impact (in bare instructions mode):
  * ARM: -3.7% RX
  * ARM64: -1.4% RX

Issue https://github.com/dart-lang/sdk/issues/33274

Change-Id: Ia1acd76ac6efa26642f99e1ce3e417100aa357f3
Reviewed-on: https://dart-review.googlesource.com/c/89620
Commit-Queue: Martin Kustermann <kustermann@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>