KonstantinSeurer
/
mesa
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

nir/cf: add insert_phi_undef() helper 

Signed-off-by: Connor Abbott <connor.w.abbott@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Connor Abbott 2015-07-21 19:54:19 -07:00 committed by Kenneth Graunke
parent b49371b8ed
commit 762ae436ea
1 changed files with 25 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
src/glsl/nir/nir_control_flow.c
View File

@ -230,6 +230,31 @@ rewrite_phi_preds(nir_block *block, nir_block *old_pred, nir_block *new_pred)
}
}
static void
insert_phi_undef(nir_block *block, nir_block *pred)
{
nir_function_impl *impl = nir_cf_node_get_function(&block->cf_node);
nir_foreach_instr(block, instr) {
if (instr->type != nir_instr_type_phi)
break;
nir_phi_instr *phi = nir_instr_as_phi(instr);
nir_ssa_undef_instr *undef =
nir_ssa_undef_instr_create(ralloc_parent(phi),
phi->dest.ssa.num_components);
nir_instr_insert_before_cf_list(&impl->body, &undef->instr);
nir_phi_src *src = ralloc(phi, nir_phi_src);
src->pred = pred;
src->src.parent_instr = &phi->instr;
src->src.is_ssa = true;
src->src.ssa = &undef->def;
list_addtail(&src->src.use_link, &undef->def.uses);
exec_list_push_tail(&phi->srcs, &src->node);
}
}
/**
* Moves the successors of source to the successors of dest, leaving both
* successors of source NULL.