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https://github.com/KhronosGroup/SPIRV-Tools
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d746681fe9
* Copy decorations when creating new ids. When creating a new value based on an old value, we need to copy the decorations to the new id. This change does this in 3 places: 1) The variable holding the return value of the function generated by merge return should get decorations from the function. 2) The results of the OpPhi instructions should get decorations from the variable they are replacing in the ssa writer. 3) In local access chain convert the intermediate struct (result of OpCompositeInsert) generated for the store replacement should get its decorations from the variable being stored to. Fixes #1787.
480 lines
18 KiB
C++
480 lines
18 KiB
C++
// Copyright (c) 2017 Pierre Moreau
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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 "source/opt/decoration_manager.h"
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#include <algorithm>
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#include <memory>
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#include <set>
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#include <stack>
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#include <utility>
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#include "source/opt/ir_context.h"
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namespace spvtools {
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namespace opt {
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namespace analysis {
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void DecorationManager::RemoveDecorationsFrom(
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uint32_t id, std::function<bool(const Instruction&)> pred) {
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const auto ids_iter = id_to_decoration_insts_.find(id);
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if (ids_iter == id_to_decoration_insts_.end()) return;
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TargetData& decorations_info = ids_iter->second;
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auto context = module_->context();
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std::vector<Instruction*> insts_to_kill;
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const bool is_group = !decorations_info.decorate_insts.empty();
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// Schedule all direct decorations for removal if instructed as such by
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// |pred|.
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for (Instruction* inst : decorations_info.direct_decorations)
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if (pred(*inst)) insts_to_kill.push_back(inst);
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// For all groups being directly applied to |id|, remove |id| (and the
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// literal if |inst| is an OpGroupMemberDecorate) from the instruction
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// applying the group.
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std::unordered_set<const Instruction*> indirect_decorations_to_remove;
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for (Instruction* inst : decorations_info.indirect_decorations) {
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assert(inst->opcode() == SpvOpGroupDecorate ||
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inst->opcode() == SpvOpGroupMemberDecorate);
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std::vector<Instruction*> group_decorations_to_keep;
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const uint32_t group_id = inst->GetSingleWordInOperand(0u);
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const auto group_iter = id_to_decoration_insts_.find(group_id);
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assert(group_iter != id_to_decoration_insts_.end() &&
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"Unknown decoration group");
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const auto& group_decorations = group_iter->second.direct_decorations;
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for (Instruction* decoration : group_decorations) {
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if (!pred(*decoration)) group_decorations_to_keep.push_back(decoration);
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}
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// If all decorations should be kept, move to the next group
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if (group_decorations_to_keep.size() == group_decorations.size()) continue;
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// Otherwise, remove |id| from the targets of |group_id|
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const uint32_t stride = inst->opcode() == SpvOpGroupDecorate ? 1u : 2u;
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bool was_modified = false;
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for (uint32_t i = 1u; i < inst->NumInOperands();) {
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if (inst->GetSingleWordInOperand(i) != id) {
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i += stride;
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continue;
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}
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const uint32_t last_operand_index = inst->NumInOperands() - stride;
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if (i < last_operand_index)
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inst->GetInOperand(i) = inst->GetInOperand(last_operand_index);
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// Remove the associated literal, if it exists.
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if (stride == 2u) {
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if (i < last_operand_index)
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inst->GetInOperand(i + 1u) =
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inst->GetInOperand(last_operand_index + 1u);
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inst->RemoveInOperand(last_operand_index + 1u);
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}
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inst->RemoveInOperand(last_operand_index);
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was_modified = true;
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}
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// If the instruction has no targets left, remove the instruction
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// altogether.
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if (inst->NumInOperands() == 1u) {
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indirect_decorations_to_remove.emplace(inst);
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insts_to_kill.push_back(inst);
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} else if (was_modified) {
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context->ForgetUses(inst);
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indirect_decorations_to_remove.emplace(inst);
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context->AnalyzeUses(inst);
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}
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// If only some of the decorations should be kept, clone them and apply
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// them directly to |id|.
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if (!group_decorations_to_keep.empty()) {
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for (Instruction* decoration : group_decorations_to_keep) {
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// simply clone decoration and change |group_id| to |id|
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std::unique_ptr<Instruction> new_inst(
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decoration->Clone(module_->context()));
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new_inst->SetInOperand(0, {id});
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module_->AddAnnotationInst(std::move(new_inst));
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auto decoration_iter = --module_->annotation_end();
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context->AnalyzeUses(&*decoration_iter);
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}
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}
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}
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auto& indirect_decorations = decorations_info.indirect_decorations;
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indirect_decorations.erase(
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std::remove_if(
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indirect_decorations.begin(), indirect_decorations.end(),
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[&indirect_decorations_to_remove](const Instruction* inst) {
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return indirect_decorations_to_remove.count(inst);
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}),
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indirect_decorations.end());
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for (Instruction* inst : insts_to_kill) context->KillInst(inst);
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insts_to_kill.clear();
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// Schedule all instructions applying the group for removal if this group no
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// longer applies decorations, either directly or indirectly.
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if (is_group && decorations_info.direct_decorations.empty() &&
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decorations_info.indirect_decorations.empty()) {
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for (Instruction* inst : decorations_info.decorate_insts)
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insts_to_kill.push_back(inst);
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}
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for (Instruction* inst : insts_to_kill) context->KillInst(inst);
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if (decorations_info.direct_decorations.empty() &&
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decorations_info.indirect_decorations.empty() &&
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decorations_info.decorate_insts.empty()) {
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id_to_decoration_insts_.erase(ids_iter);
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// Remove the OpDecorationGroup defining this group.
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if (is_group) context->KillInst(context->get_def_use_mgr()->GetDef(id));
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}
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}
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std::vector<Instruction*> DecorationManager::GetDecorationsFor(
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uint32_t id, bool include_linkage) {
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return InternalGetDecorationsFor<Instruction*>(id, include_linkage);
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}
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std::vector<const Instruction*> DecorationManager::GetDecorationsFor(
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uint32_t id, bool include_linkage) const {
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return const_cast<DecorationManager*>(this)
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->InternalGetDecorationsFor<const Instruction*>(id, include_linkage);
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}
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bool DecorationManager::HaveTheSameDecorations(uint32_t id1,
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uint32_t id2) const {
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using InstructionList = std::vector<const Instruction*>;
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using DecorationSet = std::set<std::u32string>;
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const InstructionList decorations_for1 = GetDecorationsFor(id1, false);
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const InstructionList decorations_for2 = GetDecorationsFor(id2, false);
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// This function splits the decoration instructions into different sets,
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// based on their opcode; only OpDecorate, OpDecorateId,
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// OpDecorateStringGOOGLE, and OpMemberDecorate are considered, the other
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// opcodes are ignored.
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const auto fillDecorationSets =
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[](const InstructionList& decoration_list, DecorationSet* decorate_set,
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DecorationSet* decorate_id_set, DecorationSet* decorate_string_set,
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DecorationSet* member_decorate_set) {
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for (const Instruction* inst : decoration_list) {
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std::u32string decoration_payload;
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// Ignore the opcode and the target as we do not want them to be
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// compared.
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for (uint32_t i = 1u; i < inst->NumInOperands(); ++i) {
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for (uint32_t word : inst->GetInOperand(i).words) {
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decoration_payload.push_back(word);
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}
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}
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switch (inst->opcode()) {
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case SpvOpDecorate:
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decorate_set->emplace(std::move(decoration_payload));
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break;
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case SpvOpMemberDecorate:
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member_decorate_set->emplace(std::move(decoration_payload));
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break;
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case SpvOpDecorateId:
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decorate_id_set->emplace(std::move(decoration_payload));
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break;
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case SpvOpDecorateStringGOOGLE:
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decorate_string_set->emplace(std::move(decoration_payload));
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break;
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default:
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break;
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}
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}
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};
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DecorationSet decorate_set_for1;
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DecorationSet decorate_id_set_for1;
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DecorationSet decorate_string_set_for1;
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DecorationSet member_decorate_set_for1;
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fillDecorationSets(decorations_for1, &decorate_set_for1,
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&decorate_id_set_for1, &decorate_string_set_for1,
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&member_decorate_set_for1);
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DecorationSet decorate_set_for2;
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DecorationSet decorate_id_set_for2;
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DecorationSet decorate_string_set_for2;
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DecorationSet member_decorate_set_for2;
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fillDecorationSets(decorations_for2, &decorate_set_for2,
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&decorate_id_set_for2, &decorate_string_set_for2,
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&member_decorate_set_for2);
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const bool result = decorate_set_for1 == decorate_set_for2 &&
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decorate_id_set_for1 == decorate_id_set_for2 &&
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member_decorate_set_for1 == member_decorate_set_for2 &&
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// Compare string sets last in case the strings are long.
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decorate_string_set_for1 == decorate_string_set_for2;
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return result;
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}
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// TODO(pierremoreau): If OpDecorateId is referencing an OpConstant, one could
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// check that the constants are the same rather than just
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// looking at the constant ID.
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bool DecorationManager::AreDecorationsTheSame(const Instruction* inst1,
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const Instruction* inst2,
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bool ignore_target) const {
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switch (inst1->opcode()) {
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case SpvOpDecorate:
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case SpvOpMemberDecorate:
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case SpvOpDecorateId:
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case SpvOpDecorateStringGOOGLE:
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break;
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default:
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return false;
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}
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if (inst1->opcode() != inst2->opcode() ||
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inst1->NumInOperands() != inst2->NumInOperands())
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return false;
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for (uint32_t i = ignore_target ? 1u : 0u; i < inst1->NumInOperands(); ++i)
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if (inst1->GetInOperand(i) != inst2->GetInOperand(i)) return false;
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return true;
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}
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void DecorationManager::AnalyzeDecorations() {
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if (!module_) return;
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// For each group and instruction, collect all their decoration instructions.
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for (Instruction& inst : module_->annotations()) {
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AddDecoration(&inst);
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}
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}
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void DecorationManager::AddDecoration(Instruction* inst) {
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switch (inst->opcode()) {
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case SpvOpDecorate:
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case SpvOpDecorateId:
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case SpvOpDecorateStringGOOGLE:
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case SpvOpMemberDecorate: {
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const auto target_id = inst->GetSingleWordInOperand(0u);
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id_to_decoration_insts_[target_id].direct_decorations.push_back(inst);
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break;
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}
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case SpvOpGroupDecorate:
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case SpvOpGroupMemberDecorate: {
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const uint32_t start = inst->opcode() == SpvOpGroupDecorate ? 1u : 2u;
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const uint32_t stride = start;
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for (uint32_t i = start; i < inst->NumInOperands(); i += stride) {
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const auto target_id = inst->GetSingleWordInOperand(i);
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TargetData& target_data = id_to_decoration_insts_[target_id];
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target_data.indirect_decorations.push_back(inst);
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}
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const auto target_id = inst->GetSingleWordInOperand(0u);
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id_to_decoration_insts_[target_id].decorate_insts.push_back(inst);
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break;
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}
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default:
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break;
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}
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}
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template <typename T>
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std::vector<T> DecorationManager::InternalGetDecorationsFor(
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uint32_t id, bool include_linkage) {
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std::vector<T> decorations;
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const auto ids_iter = id_to_decoration_insts_.find(id);
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// |id| has no decorations
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if (ids_iter == id_to_decoration_insts_.end()) return decorations;
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const TargetData& target_data = ids_iter->second;
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const auto process_direct_decorations =
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[include_linkage,
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&decorations](const std::vector<Instruction*>& direct_decorations) {
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for (Instruction* inst : direct_decorations) {
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const bool is_linkage = inst->opcode() == SpvOpDecorate &&
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inst->GetSingleWordInOperand(1u) ==
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SpvDecorationLinkageAttributes;
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if (include_linkage || !is_linkage) decorations.push_back(inst);
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}
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};
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// Process |id|'s decorations.
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process_direct_decorations(ids_iter->second.direct_decorations);
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// Process the decorations of all groups applied to |id|.
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for (const Instruction* inst : target_data.indirect_decorations) {
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const uint32_t group_id = inst->GetSingleWordInOperand(0u);
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const auto group_iter = id_to_decoration_insts_.find(group_id);
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assert(group_iter != id_to_decoration_insts_.end() && "Unknown group ID");
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process_direct_decorations(group_iter->second.direct_decorations);
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}
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return decorations;
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}
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bool DecorationManager::WhileEachDecoration(
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uint32_t id, uint32_t decoration,
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std::function<bool(const Instruction&)> f) {
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for (const Instruction* inst : GetDecorationsFor(id, true)) {
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switch (inst->opcode()) {
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case SpvOpMemberDecorate:
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if (inst->GetSingleWordInOperand(2) == decoration) {
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if (!f(*inst)) return false;
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}
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break;
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case SpvOpDecorate:
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case SpvOpDecorateId:
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case SpvOpDecorateStringGOOGLE:
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if (inst->GetSingleWordInOperand(1) == decoration) {
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if (!f(*inst)) return false;
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}
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break;
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default:
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assert(false && "Unexpected decoration instruction");
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}
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}
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return true;
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}
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void DecorationManager::ForEachDecoration(
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uint32_t id, uint32_t decoration,
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std::function<void(const Instruction&)> f) {
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WhileEachDecoration(id, decoration, [&f](const Instruction& inst) {
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f(inst);
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return true;
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});
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}
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void DecorationManager::CloneDecorations(uint32_t from, uint32_t to) {
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const auto decoration_list = id_to_decoration_insts_.find(from);
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if (decoration_list == id_to_decoration_insts_.end()) return;
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auto context = module_->context();
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for (Instruction* inst : decoration_list->second.direct_decorations) {
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// simply clone decoration and change |target-id| to |to|
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std::unique_ptr<Instruction> new_inst(inst->Clone(module_->context()));
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new_inst->SetInOperand(0, {to});
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module_->AddAnnotationInst(std::move(new_inst));
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auto decoration_iter = --module_->annotation_end();
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context->AnalyzeUses(&*decoration_iter);
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}
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// We need to copy the list of instructions as ForgetUses and AnalyzeUses are
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// going to modify it.
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std::vector<Instruction*> indirect_decorations =
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decoration_list->second.indirect_decorations;
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for (Instruction* inst : indirect_decorations) {
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switch (inst->opcode()) {
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case SpvOpGroupDecorate:
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context->ForgetUses(inst);
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// add |to| to list of decorated id's
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inst->AddOperand(
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Operand(spv_operand_type_t::SPV_OPERAND_TYPE_ID, {to}));
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context->AnalyzeUses(inst);
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break;
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case SpvOpGroupMemberDecorate: {
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context->ForgetUses(inst);
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// for each (id == from), add (to, literal) as operands
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const uint32_t num_operands = inst->NumOperands();
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for (uint32_t i = 1; i < num_operands; i += 2) {
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Operand op = inst->GetOperand(i);
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if (op.words[0] == from) { // add new pair of operands: (to, literal)
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inst->AddOperand(
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Operand(spv_operand_type_t::SPV_OPERAND_TYPE_ID, {to}));
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op = inst->GetOperand(i + 1);
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inst->AddOperand(std::move(op));
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}
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}
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context->AnalyzeUses(inst);
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break;
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}
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default:
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assert(false && "Unexpected decoration instruction");
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}
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}
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}
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void DecorationManager::CloneDecorations(
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uint32_t from, uint32_t to,
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const std::vector<SpvDecoration>& decorations_to_copy) {
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const auto decoration_list = id_to_decoration_insts_.find(from);
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if (decoration_list == id_to_decoration_insts_.end()) return;
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auto context = module_->context();
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for (Instruction* inst : decoration_list->second.direct_decorations) {
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if (std::find(decorations_to_copy.begin(), decorations_to_copy.end(),
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inst->GetSingleWordInOperand(1)) ==
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decorations_to_copy.end()) {
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continue;
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}
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// Clone decoration and change |target-id| to |to|.
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std::unique_ptr<Instruction> new_inst(inst->Clone(module_->context()));
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new_inst->SetInOperand(0, {to});
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module_->AddAnnotationInst(std::move(new_inst));
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auto decoration_iter = --module_->annotation_end();
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context->AnalyzeUses(&*decoration_iter);
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}
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// We need to copy the list of instructions as ForgetUses and AnalyzeUses are
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// going to modify it.
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std::vector<Instruction*> indirect_decorations =
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decoration_list->second.indirect_decorations;
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for (Instruction* inst : indirect_decorations) {
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switch (inst->opcode()) {
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case SpvOpGroupDecorate:
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CloneDecorations(inst->GetSingleWordInOperand(0), to,
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decorations_to_copy);
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break;
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case SpvOpGroupMemberDecorate: {
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assert(false && "The source id is not suppose to be a type.");
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break;
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}
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default:
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assert(false && "Unexpected decoration instruction");
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}
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}
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}
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void DecorationManager::RemoveDecoration(Instruction* inst) {
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const auto remove_from_container = [inst](std::vector<Instruction*>& v) {
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v.erase(std::remove(v.begin(), v.end(), inst), v.end());
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};
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switch (inst->opcode()) {
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case SpvOpDecorate:
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case SpvOpDecorateId:
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case SpvOpDecorateStringGOOGLE:
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case SpvOpMemberDecorate: {
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const auto target_id = inst->GetSingleWordInOperand(0u);
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auto const iter = id_to_decoration_insts_.find(target_id);
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if (iter == id_to_decoration_insts_.end()) return;
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remove_from_container(iter->second.direct_decorations);
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} break;
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case SpvOpGroupDecorate:
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case SpvOpGroupMemberDecorate: {
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const uint32_t stride = inst->opcode() == SpvOpGroupDecorate ? 1u : 2u;
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|
for (uint32_t i = 1u; i < inst->NumInOperands(); i += stride) {
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|
const auto target_id = inst->GetSingleWordInOperand(i);
|
|
auto const iter = id_to_decoration_insts_.find(target_id);
|
|
if (iter == id_to_decoration_insts_.end()) continue;
|
|
remove_from_container(iter->second.indirect_decorations);
|
|
}
|
|
const auto group_id = inst->GetSingleWordInOperand(0u);
|
|
auto const iter = id_to_decoration_insts_.find(group_id);
|
|
if (iter == id_to_decoration_insts_.end()) return;
|
|
remove_from_container(iter->second.decorate_insts);
|
|
} break;
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|
default:
|
|
break;
|
|
}
|
|
}
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} // namespace analysis
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} // namespace opt
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} // namespace spvtools
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