483 lines
16 KiB
C++
483 lines
16 KiB
C++
// Copyright (c) 2017 Google Inc.
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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/constants.h"
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#include <unordered_map>
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#include <vector>
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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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float Constant::GetFloat() const {
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assert(type()->AsFloat() != nullptr && type()->AsFloat()->width() == 32);
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if (const FloatConstant* fc = AsFloatConstant()) {
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return fc->GetFloatValue();
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} else {
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assert(AsNullConstant() && "Must be a floating point constant.");
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return 0.0f;
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}
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}
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double Constant::GetDouble() const {
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assert(type()->AsFloat() != nullptr && type()->AsFloat()->width() == 64);
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if (const FloatConstant* fc = AsFloatConstant()) {
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return fc->GetDoubleValue();
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} else {
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assert(AsNullConstant() && "Must be a floating point constant.");
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return 0.0;
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}
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}
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double Constant::GetValueAsDouble() const {
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assert(type()->AsFloat() != nullptr);
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if (type()->AsFloat()->width() == 32) {
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return GetFloat();
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} else {
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assert(type()->AsFloat()->width() == 64);
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return GetDouble();
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}
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}
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uint32_t Constant::GetU32() const {
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assert(type()->AsInteger() != nullptr);
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assert(type()->AsInteger()->width() == 32);
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if (const IntConstant* ic = AsIntConstant()) {
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return ic->GetU32BitValue();
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} else {
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assert(AsNullConstant() && "Must be an integer constant.");
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return 0u;
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}
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}
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uint64_t Constant::GetU64() const {
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assert(type()->AsInteger() != nullptr);
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assert(type()->AsInteger()->width() == 64);
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if (const IntConstant* ic = AsIntConstant()) {
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return ic->GetU64BitValue();
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} else {
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assert(AsNullConstant() && "Must be an integer constant.");
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return 0u;
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}
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}
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int32_t Constant::GetS32() const {
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assert(type()->AsInteger() != nullptr);
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assert(type()->AsInteger()->width() == 32);
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if (const IntConstant* ic = AsIntConstant()) {
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return ic->GetS32BitValue();
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} else {
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assert(AsNullConstant() && "Must be an integer constant.");
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return 0;
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}
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}
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int64_t Constant::GetS64() const {
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assert(type()->AsInteger() != nullptr);
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assert(type()->AsInteger()->width() == 64);
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if (const IntConstant* ic = AsIntConstant()) {
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return ic->GetS64BitValue();
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} else {
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assert(AsNullConstant() && "Must be an integer constant.");
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return 0;
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}
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}
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uint64_t Constant::GetZeroExtendedValue() const {
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const auto* int_type = type()->AsInteger();
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assert(int_type != nullptr);
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const auto width = int_type->width();
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assert(width <= 64);
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uint64_t value = 0;
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if (const IntConstant* ic = AsIntConstant()) {
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if (width <= 32) {
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value = ic->GetU32BitValue();
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} else {
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value = ic->GetU64BitValue();
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}
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} else {
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assert(AsNullConstant() && "Must be an integer constant.");
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}
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return value;
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}
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int64_t Constant::GetSignExtendedValue() const {
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const auto* int_type = type()->AsInteger();
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assert(int_type != nullptr);
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const auto width = int_type->width();
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assert(width <= 64);
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int64_t value = 0;
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if (const IntConstant* ic = AsIntConstant()) {
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if (width <= 32) {
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// Let the C++ compiler do the sign extension.
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value = int64_t(ic->GetS32BitValue());
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} else {
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value = ic->GetS64BitValue();
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}
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} else {
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assert(AsNullConstant() && "Must be an integer constant.");
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}
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return value;
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}
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ConstantManager::ConstantManager(IRContext* ctx) : ctx_(ctx) {
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// Populate the constant table with values from constant declarations in the
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// module. The values of each OpConstant declaration is the identity
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// assignment (i.e., each constant is its own value).
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for (const auto& inst : ctx_->module()->GetConstants()) {
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MapInst(inst);
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}
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}
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Type* ConstantManager::GetType(const Instruction* inst) const {
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return context()->get_type_mgr()->GetType(inst->type_id());
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}
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std::vector<const Constant*> ConstantManager::GetOperandConstants(
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const Instruction* inst) const {
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std::vector<const Constant*> constants;
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for (uint32_t i = 0; i < inst->NumInOperands(); i++) {
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const Operand* operand = &inst->GetInOperand(i);
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if (operand->type != SPV_OPERAND_TYPE_ID) {
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constants.push_back(nullptr);
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} else {
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uint32_t id = operand->words[0];
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const analysis::Constant* constant = FindDeclaredConstant(id);
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constants.push_back(constant);
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}
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}
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return constants;
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}
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uint32_t ConstantManager::FindDeclaredConstant(const Constant* c,
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uint32_t type_id) const {
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c = FindConstant(c);
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if (c == nullptr) {
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return 0;
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}
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for (auto range = const_val_to_id_.equal_range(c);
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range.first != range.second; ++range.first) {
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Instruction* const_def =
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context()->get_def_use_mgr()->GetDef(range.first->second);
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if (type_id == 0 || const_def->type_id() == type_id) {
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return range.first->second;
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}
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}
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return 0;
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}
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std::vector<const Constant*> ConstantManager::GetConstantsFromIds(
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const std::vector<uint32_t>& ids) const {
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std::vector<const Constant*> constants;
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for (uint32_t id : ids) {
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if (const Constant* c = FindDeclaredConstant(id)) {
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constants.push_back(c);
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} else {
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return {};
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}
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}
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return constants;
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}
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Instruction* ConstantManager::BuildInstructionAndAddToModule(
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const Constant* new_const, Module::inst_iterator* pos, uint32_t type_id) {
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// TODO(1841): Handle id overflow.
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uint32_t new_id = context()->TakeNextId();
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if (new_id == 0) {
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return nullptr;
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}
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auto new_inst = CreateInstruction(new_id, new_const, type_id);
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if (!new_inst) {
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return nullptr;
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}
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auto* new_inst_ptr = new_inst.get();
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*pos = pos->InsertBefore(std::move(new_inst));
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++(*pos);
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if (context()->AreAnalysesValid(IRContext::Analysis::kAnalysisDefUse))
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context()->get_def_use_mgr()->AnalyzeInstDefUse(new_inst_ptr);
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MapConstantToInst(new_const, new_inst_ptr);
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return new_inst_ptr;
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}
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Instruction* ConstantManager::GetDefiningInstruction(
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const Constant* c, uint32_t type_id, Module::inst_iterator* pos) {
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uint32_t decl_id = FindDeclaredConstant(c, type_id);
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if (decl_id == 0) {
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auto iter = context()->types_values_end();
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if (pos == nullptr) pos = &iter;
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return BuildInstructionAndAddToModule(c, pos, type_id);
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} else {
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auto def = context()->get_def_use_mgr()->GetDef(decl_id);
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assert(def != nullptr);
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assert((type_id == 0 || def->type_id() == type_id) &&
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"This constant already has an instruction with a different type.");
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return def;
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}
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}
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std::unique_ptr<Constant> ConstantManager::CreateConstant(
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const Type* type, const std::vector<uint32_t>& literal_words_or_ids) const {
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if (literal_words_or_ids.size() == 0) {
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// Constant declared with OpConstantNull
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return MakeUnique<NullConstant>(type);
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} else if (auto* bt = type->AsBool()) {
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assert(literal_words_or_ids.size() == 1 &&
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"Bool constant should be declared with one operand");
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return MakeUnique<BoolConstant>(bt, literal_words_or_ids.front());
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} else if (auto* it = type->AsInteger()) {
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return MakeUnique<IntConstant>(it, literal_words_or_ids);
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} else if (auto* ft = type->AsFloat()) {
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return MakeUnique<FloatConstant>(ft, literal_words_or_ids);
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} else if (auto* vt = type->AsVector()) {
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auto components = GetConstantsFromIds(literal_words_or_ids);
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if (components.empty()) return nullptr;
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// All components of VectorConstant must be of type Bool, Integer or Float.
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if (!std::all_of(components.begin(), components.end(),
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[](const Constant* c) {
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if (c->type()->AsBool() || c->type()->AsInteger() ||
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c->type()->AsFloat()) {
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return true;
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} else {
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return false;
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}
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}))
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return nullptr;
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// All components of VectorConstant must be in the same type.
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const auto* component_type = components.front()->type();
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if (!std::all_of(components.begin(), components.end(),
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[&component_type](const Constant* c) {
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if (c->type() == component_type) return true;
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return false;
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}))
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return nullptr;
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return MakeUnique<VectorConstant>(vt, components);
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} else if (auto* mt = type->AsMatrix()) {
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auto components = GetConstantsFromIds(literal_words_or_ids);
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if (components.empty()) return nullptr;
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return MakeUnique<MatrixConstant>(mt, components);
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} else if (auto* st = type->AsStruct()) {
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auto components = GetConstantsFromIds(literal_words_or_ids);
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if (components.empty()) return nullptr;
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return MakeUnique<StructConstant>(st, components);
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} else if (auto* at = type->AsArray()) {
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auto components = GetConstantsFromIds(literal_words_or_ids);
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if (components.empty()) return nullptr;
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return MakeUnique<ArrayConstant>(at, components);
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} else {
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return nullptr;
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}
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}
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const Constant* ConstantManager::GetConstantFromInst(const Instruction* inst) {
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std::vector<uint32_t> literal_words_or_ids;
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// Collect the constant defining literals or component ids.
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for (uint32_t i = 0; i < inst->NumInOperands(); i++) {
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literal_words_or_ids.insert(literal_words_or_ids.end(),
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inst->GetInOperand(i).words.begin(),
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inst->GetInOperand(i).words.end());
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}
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switch (inst->opcode()) {
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// OpConstant{True|False} have the value embedded in the opcode. So they
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// are not handled by the for-loop above. Here we add the value explicitly.
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case SpvOp::SpvOpConstantTrue:
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literal_words_or_ids.push_back(true);
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break;
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case SpvOp::SpvOpConstantFalse:
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literal_words_or_ids.push_back(false);
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break;
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case SpvOp::SpvOpConstantNull:
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case SpvOp::SpvOpConstant:
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case SpvOp::SpvOpConstantComposite:
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case SpvOp::SpvOpSpecConstantComposite:
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break;
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default:
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return nullptr;
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}
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return GetConstant(GetType(inst), literal_words_or_ids);
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}
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std::unique_ptr<Instruction> ConstantManager::CreateInstruction(
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uint32_t id, const Constant* c, uint32_t type_id) const {
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uint32_t type =
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(type_id == 0) ? context()->get_type_mgr()->GetId(c->type()) : type_id;
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if (c->AsNullConstant()) {
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return MakeUnique<Instruction>(context(), SpvOp::SpvOpConstantNull, type,
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id, std::initializer_list<Operand>{});
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} else if (const BoolConstant* bc = c->AsBoolConstant()) {
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return MakeUnique<Instruction>(
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context(),
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bc->value() ? SpvOp::SpvOpConstantTrue : SpvOp::SpvOpConstantFalse,
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type, id, std::initializer_list<Operand>{});
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} else if (const IntConstant* ic = c->AsIntConstant()) {
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return MakeUnique<Instruction>(
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context(), SpvOp::SpvOpConstant, type, id,
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std::initializer_list<Operand>{
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Operand(spv_operand_type_t::SPV_OPERAND_TYPE_TYPED_LITERAL_NUMBER,
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ic->words())});
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} else if (const FloatConstant* fc = c->AsFloatConstant()) {
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return MakeUnique<Instruction>(
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context(), SpvOp::SpvOpConstant, type, id,
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std::initializer_list<Operand>{
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Operand(spv_operand_type_t::SPV_OPERAND_TYPE_TYPED_LITERAL_NUMBER,
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fc->words())});
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} else if (const CompositeConstant* cc = c->AsCompositeConstant()) {
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return CreateCompositeInstruction(id, cc, type_id);
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} else {
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return nullptr;
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}
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}
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std::unique_ptr<Instruction> ConstantManager::CreateCompositeInstruction(
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uint32_t result_id, const CompositeConstant* cc, uint32_t type_id) const {
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std::vector<Operand> operands;
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Instruction* type_inst = context()->get_def_use_mgr()->GetDef(type_id);
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uint32_t component_index = 0;
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for (const Constant* component_const : cc->GetComponents()) {
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uint32_t component_type_id = 0;
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if (type_inst && type_inst->opcode() == SpvOpTypeStruct) {
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component_type_id = type_inst->GetSingleWordInOperand(component_index);
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} else if (type_inst && type_inst->opcode() == SpvOpTypeArray) {
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component_type_id = type_inst->GetSingleWordInOperand(0);
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}
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uint32_t id = FindDeclaredConstant(component_const, component_type_id);
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if (id == 0) {
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// Cannot get the id of the component constant, while all components
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// should have been added to the module prior to the composite constant.
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// Cannot create OpConstantComposite instruction in this case.
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return nullptr;
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}
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operands.emplace_back(spv_operand_type_t::SPV_OPERAND_TYPE_ID,
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std::initializer_list<uint32_t>{id});
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component_index++;
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}
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uint32_t type =
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(type_id == 0) ? context()->get_type_mgr()->GetId(cc->type()) : type_id;
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return MakeUnique<Instruction>(context(), SpvOp::SpvOpConstantComposite, type,
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result_id, std::move(operands));
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}
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const Constant* ConstantManager::GetConstant(
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const Type* type, const std::vector<uint32_t>& literal_words_or_ids) {
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auto cst = CreateConstant(type, literal_words_or_ids);
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return cst ? RegisterConstant(std::move(cst)) : nullptr;
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}
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const Constant* ConstantManager::GetNumericVectorConstantWithWords(
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const Vector* type, const std::vector<uint32_t>& literal_words) {
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const auto* element_type = type->element_type();
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uint32_t words_per_element = 0;
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if (const auto* float_type = element_type->AsFloat())
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words_per_element = float_type->width() / 32;
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else if (const auto* int_type = element_type->AsInteger())
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words_per_element = int_type->width() / 32;
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if (words_per_element != 1 && words_per_element != 2) return nullptr;
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if (words_per_element * type->element_count() !=
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static_cast<uint32_t>(literal_words.size())) {
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return nullptr;
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}
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std::vector<uint32_t> element_ids;
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for (uint32_t i = 0; i < type->element_count(); ++i) {
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auto first_word = literal_words.begin() + (words_per_element * i);
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std::vector<uint32_t> const_data(first_word,
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first_word + words_per_element);
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const analysis::Constant* element_constant =
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GetConstant(element_type, const_data);
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auto element_id = GetDefiningInstruction(element_constant)->result_id();
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element_ids.push_back(element_id);
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}
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return GetConstant(type, element_ids);
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}
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uint32_t ConstantManager::GetFloatConstId(float val) {
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const Constant* c = GetFloatConst(val);
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return GetDefiningInstruction(c)->result_id();
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}
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const Constant* ConstantManager::GetFloatConst(float val) {
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Type* float_type = context()->get_type_mgr()->GetFloatType();
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utils::FloatProxy<float> v(val);
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const Constant* c = GetConstant(float_type, v.GetWords());
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return c;
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}
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uint32_t ConstantManager::GetDoubleConstId(double val) {
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const Constant* c = GetDoubleConst(val);
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return GetDefiningInstruction(c)->result_id();
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}
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const Constant* ConstantManager::GetDoubleConst(double val) {
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Type* float_type = context()->get_type_mgr()->GetDoubleType();
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utils::FloatProxy<double> v(val);
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const Constant* c = GetConstant(float_type, v.GetWords());
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return c;
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}
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uint32_t ConstantManager::GetSIntConst(int32_t val) {
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Type* sint_type = context()->get_type_mgr()->GetSIntType();
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const Constant* c = GetConstant(sint_type, {static_cast<uint32_t>(val)});
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return GetDefiningInstruction(c)->result_id();
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}
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uint32_t ConstantManager::GetUIntConst(uint32_t val) {
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Type* uint_type = context()->get_type_mgr()->GetUIntType();
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const Constant* c = GetConstant(uint_type, {val});
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return GetDefiningInstruction(c)->result_id();
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}
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std::vector<const analysis::Constant*> Constant::GetVectorComponents(
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analysis::ConstantManager* const_mgr) const {
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std::vector<const analysis::Constant*> components;
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const analysis::VectorConstant* a = this->AsVectorConstant();
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const analysis::Vector* vector_type = this->type()->AsVector();
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assert(vector_type != nullptr);
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if (a != nullptr) {
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for (uint32_t i = 0; i < vector_type->element_count(); ++i) {
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components.push_back(a->GetComponents()[i]);
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}
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} else {
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const analysis::Type* element_type = vector_type->element_type();
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const analysis::Constant* element_null_const =
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const_mgr->GetConstant(element_type, {});
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for (uint32_t i = 0; i < vector_type->element_count(); ++i) {
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components.push_back(element_null_const);
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}
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}
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return components;
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}
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} // namespace analysis
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} // namespace opt
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} // namespace spvtools
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