RFR: 8263971: C2 crashes with SIGFPE with -XX:+StressGCM and -XX:+StressIGVN [v3]

[Christian Hagedorn]

On Thu, 25 Mar 2021 13:18:05 GMT, Jie Fu <jiefu at openjdk.org> wrote:

> What will happen if there is no c2 compiler?

Ah, yes, good point! I was only thinking about product builds. 

There are actually more compiler tests that have `-XX:+IgnoreUnrecognizedVMOptions` missing as for example: [Vec_mulAddS2I](https://github.com/openjdk/jdk/blob/master/test/hotspot/jtreg/compiler/loopopts/superword/Vec_MulAddS2I.java) that uses C2-specific flags. I'll file a bug to clean that up separately.

-------------

PR: https://git.openjdk.java.net/jdk/pull/3190