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nir: Remove single-source phis before opt_if_loop_last_continue

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We might have some single-source phis leftover after prior optimizations. We
want to get rid of them before merging the blocks.

Fixes: 5921a19d4b ("nir: add if opt opt_if_loop_last_continue()")

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/6312

Signed-off-by: Yevhenii Kolesnikov <yevhenii.kolesnikov@globallogic.com>
Reviewed-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16095>
This commit is contained in:
Yevhenii Kolesnikov 2022-04-21 21:20:13 +03:00 • committed by Marge Bot
parent 90ea4283b4
commit 65caf46b3b
1 changed files with 5 additions and 0 deletions
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5
src/compiler/nir/nir_opt_if.c
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@ -818,6 +818,11 @@ opt_if_loop_last_continue(nir_loop *loop, bool aggressive_last_continue)
exec_list_is_empty(&last_block->instr_list))
return false;
/* If there are single-source phis in the last block,
* get rid of them first
*/
nir_opt_remove_phis_block(last_block);
/* Move the last block of the loop inside the last if-statement */
nir_cf_list tmp;
nir_cf_extract(&tmp, nir_after_cf_node(if_node),