pub const drreg_bb_properties_t_DRREG_HANDLE_MULTI_PHASE_SLOT_RESERVATIONS: drreg_bb_properties_t = 8;Expand description
Turns on stricter logic to find free register spill slots. This avoids conflicts with slots used to spill some register value in prior instrumentation passes. An example usage is in drx_expand_scatter_gather() which is used in the app2app pass and requires spilling of registers to slots that may conflict with slots used during later instrumentation passes. Using this option also makes spill slots used in prior phases less available in future phases; the current logic skips over a slot if there’s a usage found anywhere later in the bb added by any previous phase. So it requires additional spill slots as well.