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https://github.com/KhronosGroup/SPIRV-Tools
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de3d5acc04
* Validation for SPV_KHR_maximal_reconvergence * Add pass to add/remove maximal reconvergence execution mode --------- Co-authored-by: David Neto <dneto@google.com>
104 lines
3.3 KiB
C++
104 lines
3.3 KiB
C++
// Copyright (c) 2024 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "modify_maximal_reconvergence.h"
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#include "source/opt/ir_context.h"
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#include "source/util/make_unique.h"
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namespace spvtools {
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namespace opt {
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Pass::Status ModifyMaximalReconvergence::Process() {
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bool changed = false;
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if (add_) {
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changed = AddMaximalReconvergence();
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} else {
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changed = RemoveMaximalReconvergence();
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}
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return changed ? Pass::Status::SuccessWithChange
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: Pass::Status::SuccessWithoutChange;
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}
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bool ModifyMaximalReconvergence::AddMaximalReconvergence() {
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bool changed = false;
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bool has_extension = false;
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bool has_shader =
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context()->get_feature_mgr()->HasCapability(spv::Capability::Shader);
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for (auto extension : context()->extensions()) {
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if (extension.GetOperand(0).AsString() == "SPV_KHR_maximal_reconvergence") {
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has_extension = true;
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break;
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}
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}
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std::unordered_set<uint32_t> entry_points_with_mode;
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for (auto mode : get_module()->execution_modes()) {
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if (spv::ExecutionMode(mode.GetSingleWordInOperand(1)) ==
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spv::ExecutionMode::MaximallyReconvergesKHR) {
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entry_points_with_mode.insert(mode.GetSingleWordInOperand(0));
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}
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}
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for (auto entry_point : get_module()->entry_points()) {
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const uint32_t id = entry_point.GetSingleWordInOperand(1);
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if (!entry_points_with_mode.count(id)) {
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changed = true;
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if (!has_extension) {
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context()->AddExtension("SPV_KHR_maximal_reconvergence");
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has_extension = true;
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}
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if (!has_shader) {
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context()->AddCapability(spv::Capability::Shader);
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has_shader = true;
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}
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context()->AddExecutionMode(MakeUnique<Instruction>(
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context(), spv::Op::OpExecutionMode, 0, 0,
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std::initializer_list<Operand>{
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{SPV_OPERAND_TYPE_ID, {id}},
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{SPV_OPERAND_TYPE_EXECUTION_MODE,
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{static_cast<uint32_t>(
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spv::ExecutionMode::MaximallyReconvergesKHR)}}}));
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entry_points_with_mode.insert(id);
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}
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}
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return changed;
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}
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bool ModifyMaximalReconvergence::RemoveMaximalReconvergence() {
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bool changed = false;
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std::vector<Instruction*> to_remove;
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Instruction* mode = &*get_module()->execution_mode_begin();
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while (mode) {
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if (mode->opcode() != spv::Op::OpExecutionMode &&
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mode->opcode() != spv::Op::OpExecutionModeId) {
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break;
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}
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if (spv::ExecutionMode(mode->GetSingleWordInOperand(1)) ==
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spv::ExecutionMode::MaximallyReconvergesKHR) {
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mode = context()->KillInst(mode);
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changed = true;
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} else {
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mode = mode->NextNode();
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}
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}
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changed |=
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context()->RemoveExtension(Extension::kSPV_KHR_maximal_reconvergence);
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return changed;
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}
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} // namespace opt
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} // namespace spvtools
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