RFR: 6232281: -XX:-UseLoopSafepoints causes assert(v_false, "Parse::remove_useless_nodes missed this node")

[Roberto Castañeda Lozano]

On Thu, 19 Nov 2020 09:05:06 GMT, Roberto Castañeda Lozano <rcastanedalo at openjdk.org> wrote:

> Check for nodes missed by `remove_useless_nodes()` only if PhaseRemoveUseless has actually been run. This makes it possible to use `-XX:-UseLoopSafepoints` without crashing trivially, although implicit assumptions in other parts of C2 about the existence of loop safepoints might lead to more subtle failures for more complex methods.

Check for nodes missed by remove_useless_nodes() only if PhaseRemoveUseless has
actually been run. This makes it possible to use -XX:-UseLoopSafepoints without
crashing trivially, although implicit assumptions in other parts of C2 about the
existence of loop safepoints might lead to more subtle failures for more complex
methods.

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PR: https://git.openjdk.java.net/jdk/pull/1311