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broadcom/compiler: fix DAG pre-remove for merged instructions

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When selecting an instruction to merge, we want to pre-remove that
instruction from the DAG, not the one we are merging it in, which
we had already pre-removed right before.

The reason this was not causing problems before is that the
consequence of this bug is we will choose the same instruction
again in the merge loop and trying to merge that instruction twice
will fail and we would break out of the merge loop and move on.

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9304>
This commit is contained in:
Iago Toral Quiroga 2021-02-24 11:22:16 +01:00
parent fd7d34f716
commit b41edee879
1 changed files with 1 additions and 1 deletions
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2
src/broadcom/compiler/qpu_schedule.c
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@ -1512,7 +1512,7 @@ schedule_instructions(struct v3d_compile *c,
scoreboard,
chosen))) {
time = MAX2(merge->unblocked_time, time);
pre_remove_head(scoreboard->dag, chosen);
pre_remove_head(scoreboard->dag, merge);
list_addtail(&merge->link, &merged_list);
(void)qpu_merge_inst(devinfo, inst,
inst, &merge->inst->qpu);