RFR: 8294839: Disable StressLongCountedLoop in compiler/loopopts/TestRemoveEmptyLoop.java

[Emanuel Peter]

On Wed, 5 Oct 2022 08:31:56 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

> As I have explained in [JDK-8294838](https://bugs.openjdk.org/browse/JDK-8294838), `-XX:StressLongCountedLoop=200000000` leads to a timeout in `compiler/loopopts/TestRemoveEmptyLoop.java` because an int-loop is transformed into a long-loop, but the loop is not collapsed/removed because we only remove empty int-loops.
> 
> This is a sub-task of [JDK-8294838](https://bugs.openjdk.org/browse/JDK-8294838), where we hope to implement empty loop removal for LongCountedLoops.
> 
> Manually tested the test with and without the flag.
> Test suite passes too, with and without the flag.

Thanks for the help with understanding this issue @rwestrel , thanks for the reviews @TobiHartmann @chhagedorn

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PR: https://git.openjdk.org/jdk/pull/10569