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nir: consider write_mask in nir_ssa_def_components_read()

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Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11411>
This commit is contained in:
Daniel Schürmann 2021-06-14 19:19:23 +02:00 • committed by Marge Bot
parent 73905c4d01
commit d27417b597
1 changed files with 20 additions and 0 deletions
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20
src/compiler/nir/nir.c
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@ -1566,6 +1566,19 @@ nir_ssa_def_rewrite_uses_after(nir_ssa_def *def, nir_ssa_def *new_ssa,
}
}
static nir_ssa_def *
get_store_value(nir_intrinsic_instr *intrin)
{
assert(nir_intrinsic_has_write_mask(intrin));
/* deref stores have the deref in src[0] and the store value in src[1] */
if (intrin->intrinsic == nir_intrinsic_store_deref ||
intrin->intrinsic == nir_intrinsic_store_deref_block_intel)
return intrin->src[1].ssa;
/* all other stores have the store value in src[0] */
return intrin->src[0].ssa;
}
nir_component_mask_t
nir_ssa_def_components_read(const nir_ssa_def *def)
{
@ -1577,6 +1590,13 @@ nir_ssa_def_components_read(const nir_ssa_def *def)
int src_idx = alu_src - &alu->src[0];
assert(src_idx >= 0 && src_idx < nir_op_infos[alu->op].num_inputs);
read_mask |= nir_alu_instr_src_read_mask(alu, src_idx);
} else if (use->parent_instr->type == nir_instr_type_intrinsic) {
nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(use->parent_instr);
if (nir_intrinsic_has_write_mask(intrin) && use->ssa == get_store_value(intrin)) {
read_mask |= nir_intrinsic_write_mask(intrin);
} else {
return (1 << def->num_components) - 1;
}
} else {
return (1 << def->num_components) - 1;
}