5ef7c54829
Next part don't know whether p_end_with_regs args are loaded from
memory ops or not, need to wait it's done here.
Other memory load needs to be waited too like:
a = load_mem()
b = ...
if (...) {
wait_mem(a)
store_mem(a)
}
p_end_with_regs(b)
"a" still needs to be waited, otherwise next shader part regs may
be overwritten by unfinished memory loads.
Memory stores are waited too. When >=gfx10 and last VGT has no
parameter export, we need to wait all memeory stores done before
pos export (see ac_nir_export_position). So when merged shader
(ES+GS or VS+GS) is partially built, first stage needs to wait
all memory stores done, otherwise second stage don't know if
any memory stores pending before.
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Signe-off-by: Qiang Yu <yuq825@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24973>
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