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pan/midgard: Implement per-byte liveness tracking

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Now that we have notion of byte masks, liveness tracking can be updated
to reflect this extra granularity without loss of correctness.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This commit is contained in:
Alyssa Rosenzweig 2019-10-16 12:30:13 -04:00
parent 43fd730fc4
commit d1d3411ba5
1 changed files with 2 additions and 3 deletions
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5
src/panfrost/midgard/midgard_liveness.c
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@ -60,14 +60,13 @@ mir_liveness_ins_update(uint16_t *live, midgard_instruction *ins, unsigned max)
{
/* live_in[s] = GEN[s] + (live_out[s] - KILL[s]) */
liveness_kill(live, ins->dest, max, ins->mask);
liveness_kill(live, ins->dest, max, mir_bytemask(ins));
mir_foreach_src(ins, src) {
unsigned node = ins->src[src];
unsigned bytemask = mir_bytemask_of_read_components(ins, node);
unsigned mask = mir_from_bytemask(bytemask, midgard_reg_mode_32);
liveness_gen(live, node, max, mask);
liveness_gen(live, node, max, bytemask);
}
}