RFR: JDK-8294902: Undefined Behavior in C2 regalloc with null references

[Andrew Haley]

On Tue, 1 Nov 2022 17:43:55 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> Changes are good. Can you tell more about `-fsanitize=null` effect on libjvm size and performance of fastdebug build we use in testing? If it is only few percents I am for enabling it in debug build.

It might be a bit more than that: it's a test-and-branch on every memory access.
Maybe enable it only on a non-optimized build?

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PR: https://git.openjdk.org/jdk/pull/10920