RFR: 8333258: C2: high memory usage in PhaseCFG::insert_anti_dependences() [v5]

[Emanuel Peter]

On Thu, 12 Sep 2024 08:06:05 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> Roland Westrelin has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   more review
>
> src/hotspot/share/opto/gcm.cpp line 761:
> 
>> 759: 
>> 760:     uint op = use_mem_state->Opcode();
>> 761:     assert(!use_mem_state->needs_anti_dependence_check(), "only stores");
> 
> The comment in the assert is misleading. It can also be MergeMem, Phi, etc

Maybe say `only MergeMem and state modifying nodes`. Or just `no loads`?

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PR Review Comment: https://git.openjdk.org/jdk/pull/19791#discussion_r1756356201