mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-29 06:21:06 +00:00
581279dedd
The folding rule `BitCastScalarOrVector` was incorrectly handling bitcasting to unsigned integers smaller than 32-bits. It was simply copying the entire 32-bit word containing the integer. This conflicts with the requirement in section 2.2.1 of the SPIR-V spec which states that unsigned numeric types with a bit width less than 32-bits must have the high-order bits set to 0. This change include a refactor of the bit extension code to be able to test it better, and to use it in multiple files. Fixes https://github.com/microsoft/DirectXShaderCompiler/issues/6319.
574 lines
20 KiB
C++
574 lines
20 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 <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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constants.reserve(inst->NumInOperands());
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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 spv::Op::OpConstantTrue:
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literal_words_or_ids.push_back(true);
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break;
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case spv::Op::OpConstantFalse:
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literal_words_or_ids.push_back(false);
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break;
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case spv::Op::OpConstantNull:
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case spv::Op::OpConstant:
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case spv::Op::OpConstantComposite:
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case spv::Op::OpSpecConstantComposite:
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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(), spv::Op::OpConstantNull, type, id,
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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() ? spv::Op::OpConstantTrue : spv::Op::OpConstantFalse, type,
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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(), spv::Op::OpConstant, 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(), spv::Op::OpConstant, 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() == spv::Op::OpTypeStruct) {
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component_type_id = type_inst->GetSingleWordInOperand(component_index);
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} else if (type_inst && type_inst->opcode() == spv::Op::OpTypeArray) {
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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(), spv::Op::OpConstantComposite, 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::GetNullCompositeConstant(const Type* type) {
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std::vector<uint32_t> literal_words_or_id;
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if (type->AsVector()) {
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const Type* element_type = type->AsVector()->element_type();
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const uint32_t null_id = GetNullConstId(element_type);
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const uint32_t element_count = type->AsVector()->element_count();
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for (uint32_t i = 0; i < element_count; i++) {
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literal_words_or_id.push_back(null_id);
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}
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} else if (type->AsMatrix()) {
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const Type* element_type = type->AsMatrix()->element_type();
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const uint32_t null_id = GetNullConstId(element_type);
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const uint32_t element_count = type->AsMatrix()->element_count();
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for (uint32_t i = 0; i < element_count; i++) {
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literal_words_or_id.push_back(null_id);
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}
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} else if (type->AsStruct()) {
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// TODO (sfricke-lunarg) add proper struct support
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return nullptr;
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} else if (type->AsArray()) {
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const Type* element_type = type->AsArray()->element_type();
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const uint32_t null_id = GetNullConstId(element_type);
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assert(type->AsArray()->length_info().words[0] ==
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analysis::Array::LengthInfo::kConstant &&
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"unexpected array length");
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const uint32_t element_count = type->AsArray()->length_info().words[0];
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for (uint32_t i = 0; i < element_count; i++) {
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literal_words_or_id.push_back(null_id);
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}
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} else {
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return nullptr;
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}
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return GetConstant(type, literal_words_or_id);
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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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else if (element_type->AsBool() != nullptr)
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words_per_element = 1;
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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);
|
|
const Constant* c = GetConstant(float_type, v.GetWords());
|
|
return c;
|
|
}
|
|
|
|
uint32_t ConstantManager::GetDoubleConstId(double val) {
|
|
const Constant* c = GetDoubleConst(val);
|
|
return GetDefiningInstruction(c)->result_id();
|
|
}
|
|
|
|
const Constant* ConstantManager::GetDoubleConst(double val) {
|
|
Type* float_type = context()->get_type_mgr()->GetDoubleType();
|
|
utils::FloatProxy<double> v(val);
|
|
const Constant* c = GetConstant(float_type, v.GetWords());
|
|
return c;
|
|
}
|
|
|
|
uint32_t ConstantManager::GetSIntConstId(int32_t val) {
|
|
Type* sint_type = context()->get_type_mgr()->GetSIntType();
|
|
const Constant* c = GetConstant(sint_type, {static_cast<uint32_t>(val)});
|
|
return GetDefiningInstruction(c)->result_id();
|
|
}
|
|
|
|
const Constant* ConstantManager::GetIntConst(uint64_t val, int32_t bitWidth,
|
|
bool isSigned) {
|
|
Type* int_type = context()->get_type_mgr()->GetIntType(bitWidth, isSigned);
|
|
|
|
if (isSigned) {
|
|
// Sign extend the value.
|
|
int32_t num_of_bit_to_ignore = 64 - bitWidth;
|
|
val = static_cast<int64_t>(val << num_of_bit_to_ignore) >>
|
|
num_of_bit_to_ignore;
|
|
} else if (bitWidth < 64) {
|
|
// Clear the upper bit that are not used.
|
|
uint64_t mask = ((1ull << bitWidth) - 1);
|
|
val &= mask;
|
|
}
|
|
|
|
if (bitWidth <= 32) {
|
|
return GetConstant(int_type, {static_cast<uint32_t>(val)});
|
|
}
|
|
|
|
// If the value is more than 32-bit, we need to split the operands into two
|
|
// 32-bit integers.
|
|
return GetConstant(
|
|
int_type, {static_cast<uint32_t>(val), static_cast<uint32_t>(val >> 32)});
|
|
}
|
|
|
|
uint32_t ConstantManager::GetUIntConstId(uint32_t val) {
|
|
Type* uint_type = context()->get_type_mgr()->GetUIntType();
|
|
const Constant* c = GetConstant(uint_type, {val});
|
|
return GetDefiningInstruction(c)->result_id();
|
|
}
|
|
|
|
uint32_t ConstantManager::GetNullConstId(const Type* type) {
|
|
const Constant* c = GetConstant(type, {});
|
|
return GetDefiningInstruction(c)->result_id();
|
|
}
|
|
|
|
const Constant* ConstantManager::GenerateIntegerConstant(
|
|
const analysis::Integer* integer_type, uint64_t result) {
|
|
assert(integer_type != nullptr);
|
|
|
|
std::vector<uint32_t> words;
|
|
if (integer_type->width() == 64) {
|
|
// In the 64-bit case, two words are needed to represent the value.
|
|
words = {static_cast<uint32_t>(result),
|
|
static_cast<uint32_t>(result >> 32)};
|
|
} else {
|
|
// In all other cases, only a single word is needed.
|
|
assert(integer_type->width() <= 32);
|
|
if (integer_type->IsSigned()) {
|
|
result = utils::SignExtendValue(result, integer_type->width());
|
|
} else {
|
|
result = utils::ZeroExtendValue(result, integer_type->width());
|
|
}
|
|
words = {static_cast<uint32_t>(result)};
|
|
}
|
|
return GetConstant(integer_type, words);
|
|
}
|
|
|
|
std::vector<const analysis::Constant*> Constant::GetVectorComponents(
|
|
analysis::ConstantManager* const_mgr) const {
|
|
std::vector<const analysis::Constant*> components;
|
|
const analysis::VectorConstant* a = this->AsVectorConstant();
|
|
const analysis::Vector* vector_type = this->type()->AsVector();
|
|
assert(vector_type != nullptr);
|
|
if (a != nullptr) {
|
|
for (uint32_t i = 0; i < vector_type->element_count(); ++i) {
|
|
components.push_back(a->GetComponents()[i]);
|
|
}
|
|
} else {
|
|
const analysis::Type* element_type = vector_type->element_type();
|
|
const analysis::Constant* element_null_const =
|
|
const_mgr->GetConstant(element_type, {});
|
|
for (uint32_t i = 0; i < vector_type->element_count(); ++i) {
|
|
components.push_back(element_null_const);
|
|
}
|
|
}
|
|
return components;
|
|
}
|
|
|
|
} // namespace analysis
|
|
} // namespace opt
|
|
} // namespace spvtools
|