tree d9f05392bac78b3d52233c024f722605a79cf501
parent 739393b29096e7528df4ac655044e6b2c9475c6d
author Tess Strickland <sstrickl@google.com> 1607700948 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1607700948 +0000

[vm] Unify type testing stub testing framework.

In particular, make it so that the type testing stub testing
framework can use the same indirect stub call generation as
the flow graph compiler. This avoids having to change generation
in two places if we later update how indirect calls are generated.

Other changes:

* Generate a register mask of modified registers instead of a boolean
  for more precise reporting of what was modified.

* Add a STCInternalRegs struct, like TTSInternalRegs, which exposes
  the registers not preserved by the subtype test cache stubs.

* Be more precise in the TypeTestABI about which registers are preserved
  on successful checks (namely, the inputs provided by AssertAssignable
  and InstanceOf) and which may not be, and add the TTS and STC internal
  registers to the non-preserved list.

TEST=Ran modified test on trybots for each supported architecture.

Cq-Include-Trybots: luci.dart.try:vm-kernel-linux-release-simarm64-try,vm-kernel-linux-release-x64-try,vm-kernel-linux-release-simarm-try,vm-kernel-linux-release-ia32-try
Change-Id: I58711213bc54572ea7f1e6525707fd193a000235
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/173721
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>