i#511 drreg: add separate-path state restoration features #2930
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Adds two drreg features to help support separate control flow paths such as a slowpath and a fastpath: drreg_reservation_info_ex(), which provides information on registers which have been unreserved but not yet lazily restored, and drreg_statelessly_restore_app_value() which restores app state without changing drreg state, to retain parity with a separate path. Adds some tests of the new features. Issue: #511
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Adds two drreg features to help support separate control flow paths such as
a slowpath and a fastpath: drreg_reservation_info_ex(), which provides
information on registers which have been unreserved but not yet lazily
restored, and drreg_statelessly_restore_app_value() which restores app
state without changing drreg state, to retain parity with a separate path.
Adds some tests of the new features.
Issue: #511