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nir/opt_undef: handle unpack/pack like mov/vec

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Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32249>
This commit is contained in:
Georg Lehmann 2024-11-20 17:23:06 +01:00 • committed by Marge Bot
parent af974b5fe9
commit ec487d01e2
1 changed files with 27 additions and 2 deletions
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29
src/compiler/nir/nir_opt_undef.c
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@ -62,13 +62,38 @@ opt_undef_csel(nir_builder *b, nir_alu_instr *instr)
return false;
}
static bool
op_is_mov_or_vec_or_pack_or_unpack(nir_op op)
{
switch (op) {
case nir_op_pack_32_2x16:
case nir_op_pack_32_2x16_split:
case nir_op_pack_32_4x8:
case nir_op_pack_32_4x8_split:
case nir_op_pack_64_2x32:
case nir_op_pack_64_2x32_split:
case nir_op_pack_64_4x16:
case nir_op_unpack_32_2x16:
case nir_op_unpack_32_2x16_split_x:
case nir_op_unpack_32_2x16_split_y:
case nir_op_unpack_32_4x8:
case nir_op_unpack_64_2x32:
case nir_op_unpack_64_2x32_split_x:
case nir_op_unpack_64_2x32_split_y:
case nir_op_unpack_64_4x16:
return true;
default:
return nir_op_is_vec_or_mov(op);
}
}
/**
* Replace vecN(undef, undef, ...) with a single undef.
*/
static bool
opt_undef_vecN(nir_builder *b, nir_alu_instr *alu)
{
if (!nir_op_is_vec_or_mov(alu->op))
if (!op_is_mov_or_vec_or_pack_or_unpack(alu->op))
return false;
for (unsigned i = 0; i < nir_op_infos[alu->op].num_inputs; i++) {
@ -182,7 +207,7 @@ visit_undef_use(nir_src *src, struct visit_info *info)
nir_alu_instr *alu = nir_instr_as_alu(instr);
/* opt_undef_vecN already copy propagated. */
if (nir_op_is_vec(alu->op)) {
if (op_is_mov_or_vec_or_pack_or_unpack(alu->op)) {
info->must_keep_undef = true;
return;
}