[lworld] Integrated: 8306301: [lworld] Circular dependency when unpacking

Tue Apr 18 16:58:14 UTC 2023

On Tue, 18 Apr 2023 14:35:58 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

> The enhanced `StressCallingConvention` option from [JDK-8301007](https://bugs.openjdk.org/browse/JDK-8301007) triggered a spurious assert due to an unresolvable circular dependency between register/stack slots when emitting code for unpacking. The root cause is that `v0` is used as spill register on aarch64 but that register is also used for arguments and therefore not able to resolve all circular dependencies. We should use `v8` instead which is also save on call for Java.
> 
> Thanks,
> Tobias

This pull request has now been integrated.

Changeset: 27cde0aa
Author:    Tobias Hartmann <thartmann at openjdk.org>
URL:       https://git.openjdk.org/valhalla/commit/27cde0aa962037f61ce2248be5e7f43fcbc94563
Stats:     3 lines in 2 files changed: 0 ins; 0 del; 3 mod

8306301: [lworld] Circular dependency when unpacking

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PR: https://git.openjdk.org/valhalla/pull/835