166 lines
3.5 KiB
C++
166 lines
3.5 KiB
C++
/*
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* Copyright 2013 Vadim Girlin <vadimgirlin@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* on the rights to use, copy, modify, merge, publish, distribute, sub
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* license, and/or sell copies of the Software, and to permit persons to whom
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* the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Vadim Girlin
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*/
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#include "sb_shader.h"
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#include "sb_pass.h"
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namespace r600_sb {
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int dce_cleanup::run() {
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int r;
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// Run cleanup for as long as there are unused nodes.
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do {
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nodes_changed = false;
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r = vpass::run();
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} while (r == 0 && nodes_changed);
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return r;
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}
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bool dce_cleanup::visit(node& n, bool enter) {
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if (enter) {
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} else {
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if (n.flags & NF_DEAD)
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n.remove();
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else
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cleanup_dst(n);
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}
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return true;
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}
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bool dce_cleanup::visit(alu_group_node& n, bool enter) {
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if (enter) {
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} else {
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n.expand();
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}
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return true;
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}
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bool dce_cleanup::visit(cf_node& n, bool enter) {
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if (enter) {
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if (n.flags & NF_DEAD)
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n.remove();
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else
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cleanup_dst(n);
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} else {
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if ((sh.dce_flags & DF_EXPAND) &&
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(n.bc.op_ptr->flags & (CF_CLAUSE | CF_BRANCH | CF_LOOP)))
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n.expand();
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}
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return true;
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}
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bool dce_cleanup::visit(alu_node& n, bool enter) {
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if (enter) {
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} else {
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if (n.flags & NF_DEAD)
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n.remove();
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else
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cleanup_dst(n);
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}
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return true;
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}
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bool dce_cleanup::visit(alu_packed_node& n, bool enter) {
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if (enter) {
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} else {
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if (n.flags & NF_DEAD)
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n.remove();
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else
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cleanup_dst(n);
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}
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return false;
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}
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bool dce_cleanup::visit(fetch_node& n, bool enter) {
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if (enter) {
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} else {
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if (n.flags & NF_DEAD)
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n.remove();
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else
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cleanup_dst(n);
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}
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return true;
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}
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bool dce_cleanup::visit(region_node& n, bool enter) {
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if (enter) {
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if (n.loop_phi)
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run_on(*n.loop_phi);
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} else {
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if (n.phi)
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run_on(*n.phi);
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}
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return true;
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}
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void dce_cleanup::cleanup_dst(node& n) {
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if (!cleanup_dst_vec(n.dst) && remove_unused &&
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!n.dst.empty() && !(n.flags & NF_DONT_KILL) && n.parent)
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{
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// Delete use references to the removed node from the src values.
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for (vvec::iterator I = n.src.begin(), E = n.src.end(); I != E; ++I) {
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value* v = *I;
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if (v && v->def && v->uses.size())
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{
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v->remove_use(&n);
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}
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}
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n.remove();
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nodes_changed = true;
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}
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}
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bool dce_cleanup::visit(container_node& n, bool enter) {
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if (enter)
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cleanup_dst(n);
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return true;
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}
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bool dce_cleanup::cleanup_dst_vec(vvec& vv) {
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bool alive = false;
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for (vvec::iterator I = vv.begin(), E = vv.end(); I != E; ++I) {
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value* &v = *I;
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if (!v)
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continue;
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if (v->gvn_source && v->gvn_source->is_dead())
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v->gvn_source = NULL;
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if (v->is_dead() || (remove_unused && !v->is_rel() && !v->uses.size()))
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v = NULL;
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else
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alive = true;
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}
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return alive;
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}
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} // namespace r600_sb
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