RFR: JDK-8289748: C2 compiled code crashes with SIGFPE with -XX:+StressLCM and -XX:+StressGCM [v2]

[Tobias Holenstein]

On Mon, 16 Jan 2023 23:45:34 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> Tobias Holenstein has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - updated JTreg TestRemoveEmptyCountedLoop
>>  - create SubINode directly with CastIINode as input
>
> src/hotspot/share/opto/loopTransform.cpp line 3702:
> 
>> 3700:   Node* cast_ii = ConstraintCastNode::make(cl->in(LoopNode::EntryControl), exact_limit, phase->_igvn.type(exact_limit), ConstraintCastNode::UnconditionalDependency, T_INT);
>> 3701:   phase->register_new_node(cast_ii, cl->in(LoopNode::EntryControl));
>> 3702:   phase->_igvn.replace_input_of(final_iv, 1, cast_ii);
> 
> Why replace input here instead of using it as input when `final_iv` is created?

Hi Vladimir,
You are right. I updated to directly create with `cast_ii` as input to `final_iv`

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PR: https://git.openjdk.org/jdk/pull/11990