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nir/loop_unroll: Prepare loop for unrolling in wrapper_unroll 

Without loop_prepare_for_unroll loops are losing phis.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111411
Fixes: 5db98195 "nir: add loop unroll support for wrapper loops"
Signed-off-by: Danylo Piliaiev <danylo.piliaiev@globallogic.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
This commit is contained in:
Danylo Piliaiev 2019-08-19 18:13:12 +03:00 committed by Timothy Arceri
parent 8869f44e9a
commit 84b3ef6a96
1 changed files with 1 additions and 25 deletions
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26
src/compiler/nir/nir_opt_loop_unroll.c
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@ -560,31 +560,7 @@ wrapper_unroll(nir_loop *loop)
nir_after_block(nir_if_last_else_block(terminator->nif));
}
} else {
nir_block *blk_after_loop =
nir_cursor_current_block(nir_after_cf_node(&loop->cf_node));
/* There may still be some single src phis following the loop that
* have not yet been cleaned up by another pass. Tidy those up
* before unrolling the loop.
*/
nir_foreach_instr_safe(instr, blk_after_loop) {
if (instr->type != nir_instr_type_phi)
break;
nir_phi_instr *phi = nir_instr_as_phi(instr);
assert(exec_list_length(&phi->srcs) == 1);
nir_phi_src *phi_src =
exec_node_data(nir_phi_src, exec_list_get_head(&phi->srcs), node);
nir_ssa_def_rewrite_uses(&phi->dest.ssa, phi_src->src);
nir_instr_remove(instr);
}
/* Remove break at end of the loop */
nir_block *last_loop_blk = nir_loop_last_block(loop);
nir_instr *break_instr = nir_block_last_instr(last_loop_blk);
nir_instr_remove(break_instr);
loop_prepare_for_unroll(loop);
}
/* Pluck out the loop body. */