From the jvm spec, array index is is of type int for aastore. But we use `ldr` to get index in TemplateTable::aastore().
AArch64 `ldr` instruction loads 64-bit value from memory, which doesn't match the type of array index.
This doesn't cause an issue as we only use the lower 32-bit of the loaded value for index check (`cmpw`).
We should use `ldrw` here instead as the `ldr` would exceed the boundary of array index.