RFR: 8374043: C2: assert(_base >= VectorMask && _base <= VectorZ) failed: Not a Vector [v2]

[Xiaohong Gong]

On Wed, 21 Jan 2026 01:38:50 GMT, Xiaohong Gong <xgong at openjdk.org> wrote:

>> I'd suggest to shape it as follows:
>> 
>> Node* GraphKit::unbox_vector(Node* v, const TypeInstPtr* vbox_type, BasicType elem_bt, int num_elem) {
>>   ...
>>   Node* unbox = gvn().transform(new VectorUnboxNode(C, vt, v, merged_memory()));
>>   if (!gvn().type(unbox)->isa_vect()) {
>>     assert(gvn().type(unbox) == Type::TOP, "sanity");
>>     return nullptr; // not a vector
>>   }
>>   return unbox;
>> }
>
> Sounds reasonable. I will fix it with next commit. Thanks for your suggestion!

Hi, I just updated a commit to check the result type of vector unbox in latest commit. Please help take another look. Thanks a lot!

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PR Review Comment: https://git.openjdk.org/jdk/pull/29057#discussion_r2711553611