4e9b76e23b
This patch does the lowering for a 'declare' construct that is not a function-local-scope. It also does the lowering for 'create', which has an entry-op of create and exit-op of delete. Global/NS/Struct scope 'declare's emit a single 'acc_ctor' and 'acc_dtor' (except in the case of 'link') per variable referenced. The ctor is the entry op followed by a declare_enter. The dtor is a get_device_ptr, followed by a declare_exit, followed by a delete(exit op). This DOES include any necessary bounds. This patch implements all of the above. We use a separate 'visitor' for the clauses here since it is particularly different from the other uses, AND there are only 4 valid clauses. Additionally, we had to split the modifier conversion into its own 'helpers' file, which will hopefully get some additional use in the future.
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