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https://github.com/KhronosGroup/SPIRV-Tools
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267 lines
10 KiB
C++
267 lines
10 KiB
C++
// Copyright (c) 2016 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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#ifndef TEST_OPT_ASSEMBLY_BUILDER_H_
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#define TEST_OPT_ASSEMBLY_BUILDER_H_
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#include <algorithm>
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#include <cstdint>
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#include <sstream>
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#include <string>
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#include <unordered_set>
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#include <vector>
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namespace spvtools {
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namespace opt {
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// A simple SPIR-V assembly code builder for test uses. It builds an SPIR-V
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// assembly module from vectors of assembly strings. It allows users to add
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// instructions to the main function and the type-constants-globals section
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// directly. It relies on OpName instructions and friendly-name disassembling
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// to keep the ID names unchanged after assembling.
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//
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// An assembly module is divided into several sections, matching with the
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// SPIR-V Logical Layout:
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// Global Preamble:
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// OpCapability instructions;
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// OpExtension instructions and OpExtInstImport instructions;
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// OpMemoryModel instruction;
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// OpEntryPoint and OpExecutionMode instruction;
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// OpString, OpSourceExtension, OpSource and OpSourceContinued instructions.
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// Names:
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// OpName instructions.
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// Annotations:
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// OpDecorate, OpMemberDecorate, OpGroupDecorate, OpGroupMemberDecorate and
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// OpDecorationGroup.
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// Types, Constants and Global variables:
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// Types, constants and global variables declaration instructions.
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// Main Function:
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// Main function instructions.
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// Main Function Postamble:
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// The return and function end instructions.
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//
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// The assembly code is built by concatenating all the strings in the above
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// sections.
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//
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// Users define the contents in section <Type, Constants and Global Variables>
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// and <Main Function>. The <Names> section is to hold the names for IDs to
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// keep them unchanged before and after assembling. All defined IDs to be added
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// to this code builder will be assigned with a global name through OpName
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// instruction. The name is extracted from the definition instruction.
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// E.g. adding instruction: %var_a = OpConstant %int 2, will also add an
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// instruction: OpName %var_a, "var_a".
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//
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// Note that the name must not be used on more than one defined IDs and
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// friendly-name disassembling must be enabled so that OpName instructions will
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// be respected.
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class AssemblyBuilder {
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// The base ID value for spec constants.
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static const uint32_t SPEC_ID_BASE = 200;
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public:
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// Initalize a minimal SPIR-V assembly code as the template. The minimal
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// module contains an empty main function and some predefined names for the
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// main function.
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AssemblyBuilder()
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: spec_id_counter_(SPEC_ID_BASE),
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global_preamble_({
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// clang-format off
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"OpCapability Shader",
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"OpCapability Float64",
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"%1 = OpExtInstImport \"GLSL.std.450\"",
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"OpMemoryModel Logical GLSL450",
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"OpEntryPoint Vertex %main \"main\"",
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// clang-format on
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}),
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names_(),
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annotations_(),
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types_consts_globals_(),
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main_func_(),
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main_func_postamble_({
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"OpReturn",
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"OpFunctionEnd",
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}) {
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AppendTypesConstantsGlobals({
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"%void = OpTypeVoid",
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"%main_func_type = OpTypeFunction %void",
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});
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AppendInMain({
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"%main = OpFunction %void None %main_func_type",
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"%main_func_entry_block = OpLabel",
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});
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}
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// Appends OpName instructions to this builder. Instrcution strings that do
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// not start with 'OpName ' will be skipped. Returns the references of this
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// assembly builder.
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AssemblyBuilder& AppendNames(const std::vector<std::string>& vec_asm_code) {
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for (auto& inst_str : vec_asm_code) {
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if (inst_str.find("OpName ") == 0) {
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names_.push_back(inst_str);
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}
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}
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return *this;
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}
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// Appends instructions to the types-constants-globals section and returns
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// the reference of this assembly builder. IDs defined in the given code will
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// be added to the Names section and then be registered with OpName
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// instruction. Corresponding decoration instruction will be added for spec
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// constants defined with opcode: 'OpSpecConstant'.
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AssemblyBuilder& AppendTypesConstantsGlobals(
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const std::vector<std::string>& vec_asm_code) {
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AddNamesForResultIDsIn(vec_asm_code);
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// Check spec constants defined with OpSpecConstant.
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for (auto& inst_str : vec_asm_code) {
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if (inst_str.find("= OpSpecConstant ") != std::string::npos ||
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inst_str.find("= OpSpecConstantTrue ") != std::string::npos ||
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inst_str.find("= OpSpecConstantFalse ") != std::string::npos) {
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AddSpecIDFor(GetResultIDName(inst_str));
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}
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}
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types_consts_globals_.insert(types_consts_globals_.end(),
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vec_asm_code.begin(), vec_asm_code.end());
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return *this;
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}
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// Appends instructions to the main function block, which is already labelled
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// with "main_func_entry_block". Returns the reference of this assembly
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// builder. IDs defined in the given code will be added to the Names section
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// and then be registered with OpName instruction.
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AssemblyBuilder& AppendInMain(const std::vector<std::string>& vec_asm_code) {
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AddNamesForResultIDsIn(vec_asm_code);
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main_func_.insert(main_func_.end(), vec_asm_code.begin(),
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vec_asm_code.end());
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return *this;
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}
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// Appends annotation instructions to the annotation section, and returns the
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// reference of this assembly builder.
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AssemblyBuilder& AppendAnnotations(
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const std::vector<std::string>& vec_annotations) {
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annotations_.insert(annotations_.end(), vec_annotations.begin(),
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vec_annotations.end());
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return *this;
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}
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// Pre-pends string to the preamble of the module. Useful for EFFCEE checks.
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AssemblyBuilder& PrependPreamble(const std::vector<std::string>& preamble) {
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preamble_.insert(preamble_.end(), preamble.begin(), preamble.end());
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return *this;
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}
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// Get the SPIR-V assembly code as string.
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std::string GetCode() const {
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std::ostringstream ss;
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for (const auto& line : preamble_) {
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ss << line << std::endl;
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}
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for (const auto& line : global_preamble_) {
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ss << line << std::endl;
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}
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for (const auto& line : names_) {
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ss << line << std::endl;
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}
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for (const auto& line : annotations_) {
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ss << line << std::endl;
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}
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for (const auto& line : types_consts_globals_) {
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ss << line << std::endl;
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}
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for (const auto& line : main_func_) {
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ss << line << std::endl;
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}
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for (const auto& line : main_func_postamble_) {
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ss << line << std::endl;
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}
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return ss.str();
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}
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private:
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// Adds a given name to the Name section with OpName. If the given name has
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// been added before, does nothing.
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void AddOpNameIfNotExist(const std::string& id_name) {
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if (!used_names_.count(id_name)) {
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std::stringstream opname_inst;
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opname_inst << "OpName "
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<< "%" << id_name << " \"" << id_name << "\"";
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names_.emplace_back(opname_inst.str());
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used_names_.insert(id_name);
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}
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}
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// Adds the names in a vector of assembly code strings to the Names section.
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// If a '=' sign is found in an instruction, this instruction will be treated
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// as an ID defining instruction. The ID name used in the instruction will be
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// extracted and added to the Names section.
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void AddNamesForResultIDsIn(const std::vector<std::string>& vec_asm_code) {
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for (const auto& line : vec_asm_code) {
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std::string name = GetResultIDName(line);
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if (!name.empty()) {
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AddOpNameIfNotExist(name);
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}
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}
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}
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// Adds an OpDecorate SpecId instruction for the given ID name.
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void AddSpecIDFor(const std::string& id_name) {
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std::stringstream decorate_inst;
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decorate_inst << "OpDecorate "
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<< "%" << id_name << " SpecId " << spec_id_counter_;
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spec_id_counter_ += 1;
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annotations_.emplace_back(decorate_inst.str());
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}
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// Extracts the ID name from a SPIR-V assembly instruction string. If the
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// instruction is an ID-defining instruction (has result ID), returns the
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// name of the result ID in string. If the instruction does not have result
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// ID, returns an empty string.
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std::string GetResultIDName(const std::string inst_str) {
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std::string name;
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if (inst_str.find('=') != std::string::npos) {
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size_t assign_sign = inst_str.find('=');
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name = inst_str.substr(0, assign_sign);
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name.erase(remove_if(name.begin(), name.end(),
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[](char c) { return c == ' ' || c == '%'; }),
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name.end());
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}
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return name;
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}
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uint32_t spec_id_counter_;
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// User-defined preamble.
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std::vector<std::string> preamble_;
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// The vector that contains common preambles shared across all test SPIR-V
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// code.
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std::vector<std::string> global_preamble_;
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// The vector that contains OpName instructions.
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std::vector<std::string> names_;
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// The vector that contains annotation instructions.
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std::vector<std::string> annotations_;
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// The vector that contains the code to declare types, constants and global
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// variables (aka. the Types-Constants-Globals section).
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std::vector<std::string> types_consts_globals_;
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// The vector that contains the code in main function's entry block.
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std::vector<std::string> main_func_;
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// The vector that contains the postamble of main function body.
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std::vector<std::string> main_func_postamble_;
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// All of the defined variable names.
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std::unordered_set<std::string> used_names_;
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};
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} // namespace opt
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} // namespace spvtools
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#endif // TEST_OPT_ASSEMBLY_BUILDER_H_
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