static bool
lower_locals_to_regs_block(nir_block *block,
struct locals_to_regs_state *state)
{
nir_builder *b = &state->builder;
nir_foreach_instr_safe(instr, block) {
if (instr->type != nir_instr_type_intrinsic)
continue;
nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
switch (intrin->intrinsic) {
case nir_intrinsic_load_deref: {
nir_deref_instr *deref = nir_src_as_deref(intrin->src[0]);
if (deref->mode != nir_var_function_temp)
continue;
b->cursor = nir_before_instr(&intrin->instr);
nir_alu_instr *mov = nir_alu_instr_create(b->shader, nir_op_imov);
mov->src[0].src = get_deref_reg_src(deref, state);
mov->dest.write_mask = (1 << intrin->num_components) - 1;
if (intrin->dest.is_ssa) {
nir_ssa_dest_init(&mov->instr, &mov->dest.dest,
intrin->num_components,
intrin->dest.ssa.bit_size, NULL);
nir_ssa_def_rewrite_uses(&intrin->dest.ssa,
nir_src_for_ssa(&mov->dest.dest.ssa));
} else {
nir_dest_copy(&mov->dest.dest, &intrin->dest, &mov->instr);
}
nir_builder_instr_insert(b, &mov->instr);
nir_instr_remove(&intrin->instr);
state->progress = true;
break;
}
case nir_intrinsic_store_deref: {
nir_deref_instr *deref = nir_src_as_deref(intrin->src[0]);
if (deref->mode != nir_var_function_temp)
continue;
b->cursor = nir_before_instr(&intrin->instr);
nir_src reg_src = get_deref_reg_src(deref, state);
nir_alu_instr *mov = nir_alu_instr_create(b->shader, nir_op_imov);
nir_src_copy(&mov->src[0].src, &intrin->src[1], mov);
mov->dest.write_mask = nir_intrinsic_write_mask(intrin);
mov->dest.dest.is_ssa = false;
mov->dest.dest.reg.reg = reg_src.reg.reg;
mov->dest.dest.reg.base_offset = reg_src.reg.base_offset;
mov->dest.dest.reg.indirect = reg_src.reg.indirect;
nir_builder_instr_insert(b, &mov->instr);
nir_instr_remove(&intrin->instr);
state->progress = true;
break;
}
case nir_intrinsic_copy_deref:
unreachable("There should be no copies whatsoever at this point");
break;
default:
continue;
}
}
return true;
}
nir_foreach_instr_safe(instr, block) {
if (instr->type != nir_instr_type_intrinsic)
continue;
nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
switch (intrin->intrinsic) {
case nir_intrinsic_load_var: {
if (intrin->variables[0]->var->data.mode != nir_var_local)
continue;
nir_alu_instr *mov = nir_alu_instr_create(state->shader, nir_op_imov);
mov->src[0].src = get_deref_reg_src(intrin->variables[0],
&intrin->instr, state);
mov->dest.write_mask = (1 << intrin->num_components) - 1;
if (intrin->dest.is_ssa) {
nir_ssa_dest_init(&mov->instr, &mov->dest.dest,
intrin->num_components,
intrin->dest.ssa.bit_size, NULL);
nir_ssa_def_rewrite_uses(&intrin->dest.ssa,
nir_src_for_ssa(&mov->dest.dest.ssa));
} else {
nir_dest_copy(&mov->dest.dest, &intrin->dest, &mov->instr);
}
nir_instr_insert_before(&intrin->instr, &mov->instr);
nir_instr_remove(&intrin->instr);
state->progress = true;
break;
}
case nir_intrinsic_store_var: {
if (intrin->variables[0]->var->data.mode != nir_var_local)
continue;
nir_src reg_src = get_deref_reg_src(intrin->variables[0],
&intrin->instr, state);
nir_alu_instr *mov = nir_alu_instr_create(state->shader, nir_op_imov);
nir_src_copy(&mov->src[0].src, &intrin->src[0], mov);
mov->dest.write_mask = nir_intrinsic_write_mask(intrin);
mov->dest.dest.is_ssa = false;
mov->dest.dest.reg.reg = reg_src.reg.reg;
mov->dest.dest.reg.base_offset = reg_src.reg.base_offset;
mov->dest.dest.reg.indirect = reg_src.reg.indirect;
nir_instr_insert_before(&intrin->instr, &mov->instr);
nir_instr_remove(&intrin->instr);
state->progress = true;
break;
}
case nir_intrinsic_copy_var:
unreachable("There should be no copies whatsoever at this point");
break;
default:
continue;
}
}
