RFR: 8254805: compiler/debug/TestStressCM.java is still failing

[Tobias Hartmann]

On Fri, 16 Oct 2020 06:57:33 GMT, Roberto Castañeda Lozano <rcastanedalo at openjdk.org> wrote:

> Use the code motion trace produced by `TraceOptoPipelining` (excluding traces of stubs) to assert that two compilations
> with the same seed cause `StressLCM` and `StressGCM` to take the same randomized decisions. Previously, the entire
> output produced by `PrintOptoStatistics` was used instead, which has shown to be too fragile. Also, disable inlining in
> both `TestStressCM.java` and the similar `TestStressIGVN.java` to prevent flaky behavior, and run both tests for ten
> different seeds to improve coverage.

Looks good to me.

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Marked as reviewed by thartmann (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/693