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-rw-r--r--src/glsl/nir/nir_opt_copy_propagate.c290
1 files changed, 0 insertions, 290 deletions
diff --git a/src/glsl/nir/nir_opt_copy_propagate.c b/src/glsl/nir/nir_opt_copy_propagate.c
deleted file mode 100644
index d99f78d..0000000
--- a/src/glsl/nir/nir_opt_copy_propagate.c
+++ /dev/null
@@ -1,290 +0,0 @@
-/*
- * Copyright © 2014 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- *
- * Authors:
- * Connor Abbott (cwabbott0@gmail.com)
- *
- */
-
-#include "nir.h"
-#include <main/imports.h>
-
-/**
- * SSA-based copy propagation
- */
-
-static bool is_move(nir_alu_instr *instr)
-{
- if (instr->op != nir_op_fmov &&
- instr->op != nir_op_imov)
- return false;
-
- if (instr->dest.saturate)
- return false;
-
- /* we handle modifiers in a separate pass */
-
- if (instr->src[0].abs || instr->src[0].negate)
- return false;
-
- if (!instr->src[0].src.is_ssa)
- return false;
-
- return true;
-
-}
-
-static bool is_vec(nir_alu_instr *instr)
-{
- for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) {
- if (!instr->src[i].src.is_ssa)
- return false;
-
- /* we handle modifiers in a separate pass */
- if (instr->src[i].abs || instr->src[i].negate)
- return false;
- }
-
- return instr->op == nir_op_vec2 ||
- instr->op == nir_op_vec3 ||
- instr->op == nir_op_vec4;
-}
-
-static bool
-is_swizzleless_move(nir_alu_instr *instr)
-{
- if (is_move(instr)) {
- for (unsigned i = 0; i < 4; i++) {
- if (!((instr->dest.write_mask >> i) & 1))
- break;
- if (instr->src[0].swizzle[i] != i)
- return false;
- }
- return true;
- } else if (is_vec(instr)) {
- nir_ssa_def *def = NULL;
- for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) {
- if (instr->src[i].swizzle[0] != i)
- return false;
-
- if (def == NULL) {
- def = instr->src[i].src.ssa;
- } else if (instr->src[i].src.ssa != def) {
- return false;
- }
- }
- return true;
- } else {
- return false;
- }
-}
-
-static bool
-copy_prop_src(nir_src *src, nir_instr *parent_instr, nir_if *parent_if)
-{
- if (!src->is_ssa) {
- if (src->reg.indirect)
- return copy_prop_src(src, parent_instr, parent_if);
- return false;
- }
-
- nir_instr *src_instr = src->ssa->parent_instr;
- if (src_instr->type != nir_instr_type_alu)
- return false;
-
- nir_alu_instr *alu_instr = nir_instr_as_alu(src_instr);
- if (!is_swizzleless_move(alu_instr))
- return false;
-
- /* Don't let copy propagation land us with a phi that has more
- * components in its source than it has in its destination. That badly
- * messes up out-of-ssa.
- */
- if (parent_instr && parent_instr->type == nir_instr_type_phi) {
- nir_phi_instr *phi = nir_instr_as_phi(parent_instr);
- assert(phi->dest.is_ssa);
- if (phi->dest.ssa.num_components !=
- alu_instr->src[0].src.ssa->num_components)
- return false;
- }
-
- if (parent_instr) {
- nir_instr_rewrite_src(parent_instr, src,
- nir_src_for_ssa(alu_instr->src[0].src.ssa));
- } else {
- assert(src == &parent_if->condition);
- nir_if_rewrite_condition(parent_if,
- nir_src_for_ssa(alu_instr->src[0].src.ssa));
- }
-
- return true;
-}
-
-static bool
-copy_prop_alu_src(nir_alu_instr *parent_alu_instr, unsigned index)
-{
- nir_alu_src *src = &parent_alu_instr->src[index];
- if (!src->src.is_ssa) {
- if (src->src.reg.indirect)
- return copy_prop_src(src->src.reg.indirect, &parent_alu_instr->instr,
- NULL);
- return false;
- }
-
- nir_instr *src_instr = src->src.ssa->parent_instr;
- if (src_instr->type != nir_instr_type_alu)
- return false;
-
- nir_alu_instr *alu_instr = nir_instr_as_alu(src_instr);
- if (!is_move(alu_instr) && !is_vec(alu_instr))
- return false;
-
- nir_ssa_def *def;
- unsigned new_swizzle[4] = {0, 0, 0, 0};
-
- if (alu_instr->op == nir_op_fmov ||
- alu_instr->op == nir_op_imov) {
- for (unsigned i = 0; i < 4; i++)
- new_swizzle[i] = alu_instr->src[0].swizzle[src->swizzle[i]];
- def = alu_instr->src[0].src.ssa;
- } else {
- def = NULL;
-
- for (unsigned i = 0; i < 4; i++) {
- if (!nir_alu_instr_channel_used(parent_alu_instr, index, i))
- continue;
-
- nir_ssa_def *new_def = alu_instr->src[src->swizzle[i]].src.ssa;
- if (def == NULL)
- def = new_def;
- else {
- if (def != new_def)
- return false;
- }
- new_swizzle[i] = alu_instr->src[src->swizzle[i]].swizzle[0];
- }
- }
-
- for (unsigned i = 0; i < 4; i++)
- src->swizzle[i] = new_swizzle[i];
-
- nir_instr_rewrite_src(&parent_alu_instr->instr, &src->src,
- nir_src_for_ssa(def));
-
- return true;
-}
-
-typedef struct {
- nir_instr *parent_instr;
- bool progress;
-} copy_prop_state;
-
-static bool
-copy_prop_src_cb(nir_src *src, void *_state)
-{
- copy_prop_state *state = (copy_prop_state *) _state;
- while (copy_prop_src(src, state->parent_instr, NULL))
- state->progress = true;
-
- return true;
-}
-
-static bool
-copy_prop_instr(nir_instr *instr)
-{
- if (instr->type == nir_instr_type_alu) {
- nir_alu_instr *alu_instr = nir_instr_as_alu(instr);
- bool progress = false;
-
- for (unsigned i = 0; i < nir_op_infos[alu_instr->op].num_inputs; i++)
- while (copy_prop_alu_src(alu_instr, i))
- progress = true;
-
- if (!alu_instr->dest.dest.is_ssa && alu_instr->dest.dest.reg.indirect)
- while (copy_prop_src(alu_instr->dest.dest.reg.indirect, instr, NULL))
- progress = true;
-
- return progress;
- }
-
- copy_prop_state state;
- state.parent_instr = instr;
- state.progress = false;
- nir_foreach_src(instr, copy_prop_src_cb, &state);
-
- return state.progress;
-}
-
-static bool
-copy_prop_if(nir_if *if_stmt)
-{
- return copy_prop_src(&if_stmt->condition, NULL, if_stmt);
-}
-
-static bool
-copy_prop_block(nir_block *block, void *_state)
-{
- bool *progress = (bool *) _state;
-
- nir_foreach_instr(block, instr) {
- if (copy_prop_instr(instr))
- *progress = true;
- }
-
- if (block->cf_node.node.next != NULL && /* check that we aren't the end node */
- !nir_cf_node_is_last(&block->cf_node) &&
- nir_cf_node_next(&block->cf_node)->type == nir_cf_node_if) {
- nir_if *if_stmt = nir_cf_node_as_if(nir_cf_node_next(&block->cf_node));
- if (copy_prop_if(if_stmt))
- *progress = true;
- }
-
- return true;
-}
-
-static bool
-nir_copy_prop_impl(nir_function_impl *impl)
-{
- bool progress = false;
-
- nir_foreach_block(impl, copy_prop_block, &progress);
-
- if (progress) {
- nir_metadata_preserve(impl, nir_metadata_block_index |
- nir_metadata_dominance);
- }
-
- return progress;
-}
-
-bool
-nir_copy_prop(nir_shader *shader)
-{
- bool progress = false;
-
- nir_foreach_function(shader, function) {
- if (function->impl && nir_copy_prop_impl(function->impl))
- progress = true;
- }
-
- return progress;
-}
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