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nir/lower_vec_to_movs: Handle partially SSA shaders 

v2 (Jason Ekstrand):
 - Use nir_instr_rewrite_dest
 - Pass the impl directly into lower_vec_to_movs_block

Reviewed-by: Eduardo Lima Mitev <elima@igalia.com>
This commit is contained in:
Jason Ekstrand 2015-09-09 13:42:14 -07:00
parent b7eeced3c7
commit c3f8cde964
1 changed files with 15 additions and 6 deletions
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21
src/glsl/nir/nir_lower_vec_to_movs.c
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@ -84,8 +84,11 @@ insert_mov(nir_alu_instr *vec, unsigned start_channel,
}
static bool
lower_vec_to_movs_block(nir_block *block, void *shader)
lower_vec_to_movs_block(nir_block *block, void *void_impl)
{
nir_function_impl *impl = void_impl;
nir_shader *shader = impl->overload->function->shader;
nir_foreach_instr_safe(block, instr) {
if (instr->type != nir_instr_type_alu)
continue;
@ -101,8 +104,16 @@ lower_vec_to_movs_block(nir_block *block, void *shader)
continue; /* The loop */
}
/* Since we insert multiple MOVs, we have to be non-SSA. */
assert(!vec->dest.dest.is_ssa);
if (vec->dest.dest.is_ssa) {
/* Since we insert multiple MOVs, we have a register destination. */
nir_register *reg = nir_local_reg_create(impl);
reg->num_components = vec->dest.dest.ssa.num_components;
nir_ssa_def_rewrite_uses(&vec->dest.dest.ssa, nir_src_for_reg(reg));
nir_instr_rewrite_dest(&vec->instr, &vec->dest.dest,
nir_dest_for_reg(reg));
}
unsigned finished_write_mask = 0;
@ -142,9 +153,7 @@ lower_vec_to_movs_block(nir_block *block, void *shader)
static void
nir_lower_vec_to_movs_impl(nir_function_impl *impl)
{
nir_shader *shader = impl->overload->function->shader;
nir_foreach_block(impl, lower_vec_to_movs_block, shader);
nir_foreach_block(impl, lower_vec_to_movs_block, impl);
}
void