| // Copyright (c) 2016 Google Inc. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include <algorithm> |
| #include <cassert> |
| #include <cstring> |
| #include <fstream> |
| #include <iostream> |
| #include <memory> |
| #include <sstream> |
| #include <string> |
| #include <vector> |
| |
| #include "source/opt/log.h" |
| #include "source/spirv_target_env.h" |
| #include "source/util/string_utils.h" |
| #include "spirv-tools/libspirv.hpp" |
| #include "spirv-tools/optimizer.hpp" |
| #include "tools/io.h" |
| #include "tools/util/cli_consumer.h" |
| |
| namespace { |
| |
| // Status and actions to perform after parsing command-line arguments. |
| enum OptActions { OPT_CONTINUE, OPT_STOP }; |
| |
| struct OptStatus { |
| OptActions action; |
| int code; |
| }; |
| |
| // Message consumer for this tool. Used to emit diagnostics during |
| // initialization and setup. Note that |source| and |position| are irrelevant |
| // here because we are still not processing a SPIR-V input file. |
| void opt_diagnostic(spv_message_level_t level, const char* /*source*/, |
| const spv_position_t& /*position*/, const char* message) { |
| if (level == SPV_MSG_ERROR) { |
| fprintf(stderr, "error: "); |
| } |
| fprintf(stderr, "%s\n", message); |
| } |
| |
| std::string GetListOfPassesAsString(const spvtools::Optimizer& optimizer) { |
| std::stringstream ss; |
| for (const auto& name : optimizer.GetPassNames()) { |
| ss << "\n\t\t" << name; |
| } |
| return ss.str(); |
| } |
| |
| const auto kDefaultEnvironment = SPV_ENV_UNIVERSAL_1_6; |
| |
| std::string GetLegalizationPasses() { |
| spvtools::Optimizer optimizer(kDefaultEnvironment); |
| optimizer.RegisterLegalizationPasses(); |
| return GetListOfPassesAsString(optimizer); |
| } |
| |
| std::string GetOptimizationPasses() { |
| spvtools::Optimizer optimizer(kDefaultEnvironment); |
| optimizer.RegisterPerformancePasses(); |
| return GetListOfPassesAsString(optimizer); |
| } |
| |
| std::string GetSizePasses() { |
| spvtools::Optimizer optimizer(kDefaultEnvironment); |
| optimizer.RegisterSizePasses(); |
| return GetListOfPassesAsString(optimizer); |
| } |
| |
| void PrintUsage(const char* program) { |
| std::string target_env_list = spvTargetEnvList(16, 80); |
| // NOTE: Please maintain flags in lexicographical order. |
| printf( |
| R"(%s - Optimize a SPIR-V binary file. |
| |
| USAGE: %s [options] [<input>] -o <output> |
| |
| The SPIR-V binary is read from <input>. If no file is specified, |
| or if <input> is "-", then the binary is read from standard input. |
| if <output> is "-", then the optimized output is written to |
| standard output. |
| |
| NOTE: The optimizer is a work in progress. |
| |
| Options (in lexicographical order):)", |
| program, program); |
| printf(R"( |
| --amd-ext-to-khr |
| Replaces the extensions VK_AMD_shader_ballot, VK_AMD_gcn_shader, |
| and VK_AMD_shader_trinary_minmax with equivalent code using core |
| instructions and capabilities.)"); |
| printf(R"( |
| --before-hlsl-legalization |
| Forwards this option to the validator. See the validator help |
| for details.)"); |
| printf(R"( |
| --ccp |
| Apply the conditional constant propagation transform. This will |
| propagate constant values throughout the program, and simplify |
| expressions and conditional jumps with known predicate |
| values. Performed on entry point call tree functions and |
| exported functions.)"); |
| printf(R"( |
| --cfg-cleanup |
| Cleanup the control flow graph. This will remove any unnecessary |
| code from the CFG like unreachable code. Performed on entry |
| point call tree functions and exported functions.)"); |
| printf(R"( |
| --combine-access-chains |
| Combines chained access chains to produce a single instruction |
| where possible.)"); |
| printf(R"( |
| --compact-ids |
| Remap result ids to a compact range starting from %%1 and without |
| any gaps.)"); |
| printf(R"( |
| --convert-local-access-chains |
| Convert constant index access chain loads/stores into |
| equivalent load/stores with inserts and extracts. Performed |
| on function scope variables referenced only with load, store, |
| and constant index access chains in entry point call tree |
| functions.)"); |
| printf(R"( |
| --convert-relaxed-to-half |
| Convert all RelaxedPrecision arithmetic operations to half |
| precision, inserting conversion operations where needed. |
| Run after function scope variable load and store elimination |
| for better results. Simplify-instructions, redundancy-elimination |
| and DCE should be run after this pass to eliminate excess |
| conversions. This conversion is useful when the target platform |
| does not support RelaxedPrecision or ignores it. This pass also |
| removes all RelaxedPrecision decorations.)"); |
| printf(R"( |
| --convert-to-sampled-image "<descriptor set>:<binding> ..." |
| convert images and/or samplers with the given pairs of descriptor |
| set and binding to sampled images. If a pair of an image and a |
| sampler have the same pair of descriptor set and binding that is |
| one of the given pairs, they will be converted to a sampled |
| image. In addition, if only an image or a sampler has the |
| descriptor set and binding that is one of the given pairs, it |
| will be converted to a sampled image.)"); |
| printf(R"( |
| --copy-propagate-arrays |
| Does propagation of memory references when an array is a copy of |
| another. It will only propagate an array if the source is never |
| written to, and the only store to the target is the copy.)"); |
| printf(R"( |
| --replace-desc-array-access-using-var-index |
| Replaces accesses to descriptor arrays based on a variable index |
| with a switch that has a case for every possible value of the |
| index.)"); |
| printf(R"( |
| --spread-volatile-semantics |
| Spread Volatile semantics to variables with SMIDNV, WarpIDNV, |
| SubgroupSize, SubgroupLocalInvocationId, SubgroupEqMask, |
| SubgroupGeMask, SubgroupGtMask, SubgroupLeMask, or SubgroupLtMask |
| BuiltIn decorations or OpLoad for them when the shader model is |
| ray generation, closest hit, miss, intersection, or callable. |
| For the SPIR-V version is 1.6 or above, it also spreads Volatile |
| semantics to a variable with HelperInvocation BuiltIn decoration |
| in the fragement shader.)"); |
| printf(R"( |
| --descriptor-scalar-replacement |
| Replaces every array variable |desc| that has a DescriptorSet |
| and Binding decorations with a new variable for each element of |
| the array. Suppose |desc| was bound at binding |b|. Then the |
| variable corresponding to |desc[i]| will have binding |b+i|. |
| The descriptor set will be the same. All accesses to |desc| |
| must be in OpAccessChain instructions with a literal index for |
| the first index.)"); |
| printf(R"( |
| --eliminate-dead-branches |
| Convert conditional branches with constant condition to the |
| indicated unconditional branch. Delete all resulting dead |
| code. Performed only on entry point call tree functions.)"); |
| printf(R"( |
| --eliminate-dead-code-aggressive |
| Delete instructions which do not contribute to a function's |
| output. Performed only on entry point call tree functions.)"); |
| printf(R"( |
| --eliminate-dead-const |
| Eliminate dead constants.)"); |
| printf(R"( |
| --eliminate-dead-functions |
| Deletes functions that cannot be reached from entry points or |
| exported functions.)"); |
| printf(R"( |
| --eliminate-dead-inserts |
| Deletes unreferenced inserts into composites, most notably |
| unused stores to vector components, that are not removed by |
| aggressive dead code elimination.)"); |
| printf(R"( |
| --eliminate-dead-input-components |
| Deletes unused components from input variables. Currently |
| deletes trailing unused elements from input arrays.)"); |
| printf(R"( |
| --eliminate-dead-variables |
| Deletes module scope variables that are not referenced.)"); |
| printf(R"( |
| --eliminate-insert-extract |
| DEPRECATED. This pass has been replaced by the simplification |
| pass, and that pass will be run instead. |
| See --simplify-instructions.)"); |
| printf(R"( |
| --eliminate-local-multi-store |
| Replace stores and loads of function scope variables that are |
| stored multiple times. Performed on variables referenceed only |
| with loads and stores. Performed only on entry point call tree |
| functions.)"); |
| printf(R"( |
| --eliminate-local-single-block |
| Perform single-block store/load and load/load elimination. |
| Performed only on function scope variables in entry point |
| call tree functions.)"); |
| printf(R"( |
| --eliminate-local-single-store |
| Replace stores and loads of function scope variables that are |
| only stored once. Performed on variables referenceed only with |
| loads and stores. Performed only on entry point call tree |
| functions.)"); |
| printf(R"( |
| --fix-func-call-param |
| fix non memory argument for the function call, replace |
| accesschain pointer argument with a variable.)"); |
| printf(R"( |
| --flatten-decorations |
| Replace decoration groups with repeated OpDecorate and |
| OpMemberDecorate instructions.)"); |
| printf(R"( |
| --fold-spec-const-op-composite |
| Fold the spec constants defined by OpSpecConstantOp or |
| OpSpecConstantComposite instructions to front-end constants |
| when possible.)"); |
| printf(R"( |
| --freeze-spec-const |
| Freeze the values of specialization constants to their default |
| values.)"); |
| printf(R"( |
| --graphics-robust-access |
| Clamp indices used to access buffers and internal composite |
| values, providing guarantees that satisfy Vulkan's |
| robustBufferAccess rules.)"); |
| printf(R"( |
| --if-conversion |
| Convert if-then-else like assignments into OpSelect.)"); |
| printf(R"( |
| --inline-entry-points-exhaustive |
| Exhaustively inline all function calls in entry point call tree |
| functions. Currently does not inline calls to functions with |
| early return in a loop.)"); |
| printf(R"( |
| --legalize-hlsl |
| Runs a series of optimizations that attempts to take SPIR-V |
| generated by an HLSL front-end and generates legal Vulkan SPIR-V. |
| The optimizations are: |
| %s |
| |
| Note this does not guarantee legal code. This option passes the |
| option --relax-logical-pointer to the validator.)", |
| GetLegalizationPasses().c_str()); |
| printf(R"( |
| --local-redundancy-elimination |
| Looks for instructions in the same basic block that compute the |
| same value, and deletes the redundant ones.)"); |
| printf(R"( |
| --loop-fission |
| Splits any top level loops in which the register pressure has |
| exceeded a given threshold. The threshold must follow the use of |
| this flag and must be a positive integer value.)"); |
| printf(R"( |
| --loop-fusion |
| Identifies adjacent loops with the same lower and upper bound. |
| If this is legal, then merge the loops into a single loop. |
| Includes heuristics to ensure it does not increase number of |
| registers too much, while reducing the number of loads from |
| memory. Takes an additional positive integer argument to set |
| the maximum number of registers.)"); |
| printf(R"( |
| --loop-invariant-code-motion |
| Identifies code in loops that has the same value for every |
| iteration of the loop, and move it to the loop pre-header.)"); |
| printf(R"( |
| --loop-unroll |
| Fully unrolls loops marked with the Unroll flag)"); |
| printf(R"( |
| --loop-unroll-partial |
| Partially unrolls loops marked with the Unroll flag. Takes an |
| additional non-0 integer argument to set the unroll factor, or |
| how many times a loop body should be duplicated)"); |
| printf(R"( |
| --loop-peeling |
| Execute few first (respectively last) iterations before |
| (respectively after) the loop if it can elide some branches.)"); |
| printf(R"( |
| --loop-peeling-threshold |
| Takes a non-0 integer argument to set the loop peeling code size |
| growth threshold. The threshold prevents the loop peeling |
| from happening if the code size increase created by |
| the optimization is above the threshold.)"); |
| printf(R"( |
| --max-id-bound=<n> |
| Sets the maximum value for the id bound for the module. The |
| default is the minimum value for this limit, 0x3FFFFF. See |
| section 2.17 of the Spir-V specification.)"); |
| printf(R"( |
| --merge-blocks |
| Join two blocks into a single block if the second has the |
| first as its only predecessor. Performed only on entry point |
| call tree functions.)"); |
| printf(R"( |
| --merge-return |
| Changes functions that have multiple return statements so they |
| have a single return statement. |
| |
| For structured control flow it is assumed that the only |
| unreachable blocks in the function are trivial merge and continue |
| blocks. |
| |
| A trivial merge block contains the label and an OpUnreachable |
| instructions, nothing else. A trivial continue block contain a |
| label and an OpBranch to the header, nothing else. |
| |
| These conditions are guaranteed to be met after running |
| dead-branch elimination.)"); |
| printf(R"( |
| --loop-unswitch |
| Hoists loop-invariant conditionals out of loops by duplicating |
| the loop on each branch of the conditional and adjusting each |
| copy of the loop.)"); |
| printf(R"( |
| -O |
| Optimize for performance. Apply a sequence of transformations |
| in an attempt to improve the performance of the generated |
| code. For this version of the optimizer, this flag is equivalent |
| to specifying the following optimization code names: |
| %s)", |
| GetOptimizationPasses().c_str()); |
| printf(R"( |
| -Os |
| Optimize for size. Apply a sequence of transformations in an |
| attempt to minimize the size of the generated code. For this |
| version of the optimizer, this flag is equivalent to specifying |
| the following optimization code names: |
| %s |
| |
| NOTE: The specific transformations done by -O and -Os change |
| from release to release.)", |
| GetSizePasses().c_str()); |
| printf(R"( |
| -Oconfig=<file> |
| Apply the sequence of transformations indicated in <file>. |
| This file contains a sequence of strings separated by whitespace |
| (tabs, newlines or blanks). Each string is one of the flags |
| accepted by spirv-opt. Optimizations will be applied in the |
| sequence they appear in the file. This is equivalent to |
| specifying all the flags on the command line. For example, |
| given the file opts.cfg with the content: |
| |
| --inline-entry-points-exhaustive |
| --eliminate-dead-code-aggressive |
| |
| The following two invocations to spirv-opt are equivalent: |
| |
| $ spirv-opt -Oconfig=opts.cfg program.spv |
| |
| $ spirv-opt --inline-entry-points-exhaustive \ |
| --eliminate-dead-code-aggressive program.spv |
| |
| Lines starting with the character '#' in the configuration |
| file indicate a comment and will be ignored. |
| |
| The -O, -Os, and -Oconfig flags act as macros. Using one of them |
| is equivalent to explicitly inserting the underlying flags at |
| that position in the command line. For example, the invocation |
| 'spirv-opt --merge-blocks -O ...' applies the transformation |
| --merge-blocks followed by all the transformations implied by |
| -O.)"); |
| printf(R"( |
| --preserve-bindings |
| Ensure that the optimizer preserves all bindings declared within |
| the module, even when those bindings are unused.)"); |
| printf(R"( |
| --preserve-spec-constants |
| Ensure that the optimizer preserves all specialization constants declared |
| within the module, even when those constants are unused.)"); |
| printf(R"( |
| --print-all |
| Print SPIR-V assembly to standard error output before each pass |
| and after the last pass.)"); |
| printf(R"( |
| --private-to-local |
| Change the scope of private variables that are used in a single |
| function to that function.)"); |
| printf(R"( |
| --reduce-load-size[=<threshold>] |
| Replaces loads of composite objects where not every component is |
| used by loads of just the elements that are used. If the ratio |
| of the used components of the load is less than the <threshold>, |
| we replace the load. <threshold> is a double type number. If |
| it is bigger than 1.0, we always replaces the load.)"); |
| printf(R"( |
| --redundancy-elimination |
| Looks for instructions in the same function that compute the |
| same value, and deletes the redundant ones.)"); |
| printf(R"( |
| --relax-block-layout |
| Forwards this option to the validator. See the validator help |
| for details.)"); |
| printf(R"( |
| --relax-float-ops |
| Decorate all float operations with RelaxedPrecision if not already |
| so decorated. This does not decorate types or variables.)"); |
| printf(R"( |
| --relax-logical-pointer |
| Forwards this option to the validator. See the validator help |
| for details.)"); |
| printf(R"( |
| --relax-struct-store |
| Forwards this option to the validator. See the validator help |
| for details.)"); |
| printf(R"( |
| --remove-duplicates |
| Removes duplicate types, decorations, capabilities and extension |
| instructions.)"); |
| printf(R"( |
| --remove-unused-interface-variables |
| Removes variables referenced on the |OpEntryPoint| instruction |
| that are not referenced in the entry point function or any function |
| in its call tree. Note that this could cause the shader interface |
| to no longer match other shader stages.)"); |
| printf(R"( |
| --replace-invalid-opcode |
| Replaces instructions whose opcode is valid for shader modules, |
| but not for the current shader stage. To have an effect, all |
| entry points must have the same execution model.)"); |
| printf(R"( |
| --ssa-rewrite |
| Replace loads and stores to function local variables with |
| operations on SSA IDs.)"); |
| printf(R"( |
| --scalar-block-layout |
| Forwards this option to the validator. See the validator help |
| for details.)"); |
| printf(R"( |
| --scalar-replacement[=<n>] |
| Replace aggregate function scope variables that are only accessed |
| via their elements with new function variables representing each |
| element. <n> is a limit on the size of the aggregates that will |
| be replaced. 0 means there is no limit. The default value is |
| 100.)"); |
| printf(R"( |
| --set-spec-const-default-value "<spec id>:<default value> ..." |
| Set the default values of the specialization constants with |
| <spec id>:<default value> pairs specified in a double-quoted |
| string. <spec id>:<default value> pairs must be separated by |
| blank spaces, and in each pair, spec id and default value must |
| be separated with colon ':' without any blank spaces in between. |
| e.g.: --set-spec-const-default-value "1:100 2:400")"); |
| printf(R"( |
| --simplify-instructions |
| Will simplify all instructions in the function as much as |
| possible.)"); |
| printf(R"( |
| --skip-block-layout |
| Forwards this option to the validator. See the validator help |
| for details.)"); |
| printf(R"( |
| --skip-validation |
| Will not validate the SPIR-V before optimizing. If the SPIR-V |
| is invalid, the optimizer may fail or generate incorrect code. |
| This options should be used rarely, and with caution.)"); |
| printf(R"( |
| --strength-reduction |
| Replaces instructions with equivalent and less expensive ones.)"); |
| printf(R"( |
| --strip-debug |
| Remove all debug instructions.)"); |
| printf(R"( |
| --strip-nonsemantic |
| Remove all reflection and nonsemantic information.)"); |
| printf(R"( |
| --strip-reflect |
| DEPRECATED. Remove all reflection information. For now, this |
| covers reflection information defined by |
| SPV_GOOGLE_hlsl_functionality1 and SPV_KHR_non_semantic_info)"); |
| printf(R"( |
| --target-env=<env> |
| Set the target environment. Without this flag the target |
| environment defaults to spv1.5. <env> must be one of |
| {%s})", |
| target_env_list.c_str()); |
| printf(R"( |
| --time-report |
| Print the resource utilization of each pass (e.g., CPU time, |
| RSS) to standard error output. Currently it supports only Unix |
| systems. This option is the same as -ftime-report in GCC. It |
| prints CPU/WALL/USR/SYS time (and RSS if possible), but note that |
| USR/SYS time are returned by getrusage() and can have a small |
| error.)"); |
| printf(R"( |
| --upgrade-memory-model |
| Upgrades the Logical GLSL450 memory model to Logical VulkanKHR. |
| Transforms memory, image, atomic and barrier operations to conform |
| to that model's requirements.)"); |
| printf(R"( |
| --vector-dce |
| This pass looks for components of vectors that are unused, and |
| removes them from the vector. Note this would still leave around |
| lots of dead code that a pass of ADCE will be able to remove.)"); |
| printf(R"( |
| --workaround-1209 |
| Rewrites instructions for which there are known driver bugs to |
| avoid triggering those bugs. |
| Current workarounds: Avoid OpUnreachable in loops.)"); |
| printf(R"( |
| --workgroup-scalar-block-layout |
| Forwards this option to the validator. See the validator help |
| for details.)"); |
| printf(R"( |
| --wrap-opkill |
| Replaces all OpKill instructions in functions that can be called |
| from a continue construct with a function call to a function |
| whose only instruction is an OpKill. This is done to enable |
| inlining on these functions. |
| )"); |
| printf(R"( |
| --unify-const |
| Remove the duplicated constants.)"); |
| printf(R"( |
| --validate-after-all |
| Validate the module after each pass is performed.)"); |
| printf(R"( |
| -h, --help |
| Print this help.)"); |
| printf(R"( |
| --version |
| Display optimizer version information. |
| )"); |
| } |
| |
| // Reads command-line flags the file specified in |oconfig_flag|. This string |
| // is assumed to have the form "-Oconfig=FILENAME". This function parses the |
| // string and extracts the file name after the '=' sign. |
| // |
| // Flags found in |FILENAME| are pushed at the end of the vector |file_flags|. |
| // |
| // This function returns true on success, false on failure. |
| bool ReadFlagsFromFile(const char* oconfig_flag, |
| std::vector<std::string>* file_flags) { |
| const char* fname = strchr(oconfig_flag, '='); |
| if (fname == nullptr || fname[0] != '=') { |
| spvtools::Errorf(opt_diagnostic, nullptr, {}, "Invalid -Oconfig flag %s", |
| oconfig_flag); |
| return false; |
| } |
| fname++; |
| |
| std::ifstream input_file; |
| input_file.open(fname); |
| if (input_file.fail()) { |
| spvtools::Errorf(opt_diagnostic, nullptr, {}, "Could not open file '%s'", |
| fname); |
| return false; |
| } |
| |
| std::string line; |
| while (std::getline(input_file, line)) { |
| // Ignore empty lines and lines starting with the comment marker '#'. |
| if (line.length() == 0 || line[0] == '#') { |
| continue; |
| } |
| |
| // Tokenize the line. Add all found tokens to the list of found flags. This |
| // mimics the way the shell will parse whitespace on the command line. NOTE: |
| // This does not support quoting and it is not intended to. |
| std::istringstream iss(line); |
| while (!iss.eof()) { |
| std::string flag; |
| iss >> flag; |
| file_flags->push_back(flag); |
| } |
| } |
| |
| return true; |
| } |
| |
| OptStatus ParseFlags(int argc, const char** argv, |
| spvtools::Optimizer* optimizer, const char** in_file, |
| const char** out_file, |
| spvtools::ValidatorOptions* validator_options, |
| spvtools::OptimizerOptions* optimizer_options); |
| |
| // Parses and handles the -Oconfig flag. |prog_name| contains the name of |
| // the spirv-opt binary (used to build a new argv vector for the recursive |
| // invocation to ParseFlags). |opt_flag| contains the -Oconfig=FILENAME flag. |
| // |optimizer|, |in_file|, |out_file|, |validator_options|, and |
| // |optimizer_options| are as in ParseFlags. |
| // |
| // This returns the same OptStatus instance returned by ParseFlags. |
| OptStatus ParseOconfigFlag(const char* prog_name, const char* opt_flag, |
| spvtools::Optimizer* optimizer, const char** in_file, |
| const char** out_file, |
| spvtools::ValidatorOptions* validator_options, |
| spvtools::OptimizerOptions* optimizer_options) { |
| std::vector<std::string> flags; |
| flags.push_back(prog_name); |
| |
| std::vector<std::string> file_flags; |
| if (!ReadFlagsFromFile(opt_flag, &file_flags)) { |
| spvtools::Error(opt_diagnostic, nullptr, {}, |
| "Could not read optimizer flags from configuration file"); |
| return {OPT_STOP, 1}; |
| } |
| flags.insert(flags.end(), file_flags.begin(), file_flags.end()); |
| |
| const char** new_argv = new const char*[flags.size()]; |
| for (size_t i = 0; i < flags.size(); i++) { |
| if (flags[i].find("-Oconfig=") != std::string::npos) { |
| spvtools::Error( |
| opt_diagnostic, nullptr, {}, |
| "Flag -Oconfig= may not be used inside the configuration file"); |
| return {OPT_STOP, 1}; |
| } |
| new_argv[i] = flags[i].c_str(); |
| } |
| |
| auto ret_val = |
| ParseFlags(static_cast<int>(flags.size()), new_argv, optimizer, in_file, |
| out_file, validator_options, optimizer_options); |
| delete[] new_argv; |
| return ret_val; |
| } |
| |
| // Canonicalize the flag in |argv[argi]| of the form '--pass arg' into |
| // '--pass=arg'. The optimizer only accepts arguments to pass names that use the |
| // form '--pass_name=arg'. Since spirv-opt also accepts the other form, this |
| // function makes the necessary conversion. |
| // |
| // Pass flags that require additional arguments should be handled here. Note |
| // that additional arguments should be given as a single string. If the flag |
| // requires more than one argument, the pass creator in |
| // Optimizer::GetPassFromFlag() should parse it accordingly (e.g., see the |
| // handler for --set-spec-const-default-value). |
| // |
| // If the argument requests one of the passes that need an additional argument, |
| // |argi| is modified to point past the current argument, and the string |
| // "argv[argi]=argv[argi + 1]" is returned. Otherwise, |argi| is unmodified and |
| // the string "|argv[argi]|" is returned. |
| std::string CanonicalizeFlag(const char** argv, int argc, int* argi) { |
| const char* cur_arg = argv[*argi]; |
| const char* next_arg = (*argi + 1 < argc) ? argv[*argi + 1] : nullptr; |
| std::ostringstream canonical_arg; |
| canonical_arg << cur_arg; |
| |
| // NOTE: DO NOT ADD NEW FLAGS HERE. |
| // |
| // These flags are supported for backwards compatibility. When adding new |
| // passes that need extra arguments in its command-line flag, please make them |
| // use the syntax "--pass_name[=pass_arg]. |
| if (0 == strcmp(cur_arg, "--set-spec-const-default-value") || |
| 0 == strcmp(cur_arg, "--loop-fission") || |
| 0 == strcmp(cur_arg, "--loop-fusion") || |
| 0 == strcmp(cur_arg, "--loop-unroll-partial") || |
| 0 == strcmp(cur_arg, "--loop-peeling-threshold")) { |
| if (next_arg) { |
| canonical_arg << "=" << next_arg; |
| ++(*argi); |
| } |
| } |
| |
| return canonical_arg.str(); |
| } |
| |
| // Parses command-line flags. |argc| contains the number of command-line flags. |
| // |argv| points to an array of strings holding the flags. |optimizer| is the |
| // Optimizer instance used to optimize the program. |
| // |
| // On return, this function stores the name of the input program in |in_file|. |
| // The name of the output file in |out_file|. The return value indicates whether |
| // optimization should continue and a status code indicating an error or |
| // success. |
| OptStatus ParseFlags(int argc, const char** argv, |
| spvtools::Optimizer* optimizer, const char** in_file, |
| const char** out_file, |
| spvtools::ValidatorOptions* validator_options, |
| spvtools::OptimizerOptions* optimizer_options) { |
| std::vector<std::string> pass_flags; |
| for (int argi = 1; argi < argc; ++argi) { |
| const char* cur_arg = argv[argi]; |
| if ('-' == cur_arg[0]) { |
| if (0 == strcmp(cur_arg, "--version")) { |
| spvtools::Logf(opt_diagnostic, SPV_MSG_INFO, nullptr, {}, "%s\n", |
| spvSoftwareVersionDetailsString()); |
| return {OPT_STOP, 0}; |
| } else if (0 == strcmp(cur_arg, "--help") || 0 == strcmp(cur_arg, "-h")) { |
| PrintUsage(argv[0]); |
| return {OPT_STOP, 0}; |
| } else if (0 == strcmp(cur_arg, "-o")) { |
| if (!*out_file && argi + 1 < argc) { |
| *out_file = argv[++argi]; |
| } else { |
| PrintUsage(argv[0]); |
| return {OPT_STOP, 1}; |
| } |
| } else if ('\0' == cur_arg[1]) { |
| // Setting a filename of "-" to indicate stdin. |
| if (!*in_file) { |
| *in_file = cur_arg; |
| } else { |
| spvtools::Error(opt_diagnostic, nullptr, {}, |
| "More than one input file specified"); |
| return {OPT_STOP, 1}; |
| } |
| } else if (0 == strncmp(cur_arg, "-Oconfig=", sizeof("-Oconfig=") - 1)) { |
| OptStatus status = |
| ParseOconfigFlag(argv[0], cur_arg, optimizer, in_file, out_file, |
| validator_options, optimizer_options); |
| if (status.action != OPT_CONTINUE) { |
| return status; |
| } |
| } else if (0 == strcmp(cur_arg, "--skip-validation")) { |
| optimizer_options->set_run_validator(false); |
| } else if (0 == strcmp(cur_arg, "--print-all")) { |
| optimizer->SetPrintAll(&std::cerr); |
| } else if (0 == strcmp(cur_arg, "--preserve-bindings")) { |
| optimizer_options->set_preserve_bindings(true); |
| } else if (0 == strcmp(cur_arg, "--preserve-spec-constants")) { |
| optimizer_options->set_preserve_spec_constants(true); |
| } else if (0 == strcmp(cur_arg, "--time-report")) { |
| optimizer->SetTimeReport(&std::cerr); |
| } else if (0 == strcmp(cur_arg, "--relax-struct-store")) { |
| validator_options->SetRelaxStructStore(true); |
| } else if (0 == strncmp(cur_arg, "--max-id-bound=", |
| sizeof("--max-id-bound=") - 1)) { |
| auto split_flag = spvtools::utils::SplitFlagArgs(cur_arg); |
| // Will not allow values in the range [2^31,2^32). |
| uint32_t max_id_bound = |
| static_cast<uint32_t>(atoi(split_flag.second.c_str())); |
| |
| // That SPIR-V mandates the minimum value for max id bound but |
| // implementations may allow higher minimum bounds. |
| if (max_id_bound < kDefaultMaxIdBound) { |
| spvtools::Error(opt_diagnostic, nullptr, {}, |
| "The max id bound must be at least 0x3FFFFF"); |
| return {OPT_STOP, 1}; |
| } |
| optimizer_options->set_max_id_bound(max_id_bound); |
| validator_options->SetUniversalLimit(spv_validator_limit_max_id_bound, |
| max_id_bound); |
| } else if (0 == strncmp(cur_arg, |
| "--target-env=", sizeof("--target-env=") - 1)) { |
| const auto split_flag = spvtools::utils::SplitFlagArgs(cur_arg); |
| const auto target_env_str = split_flag.second.c_str(); |
| spv_target_env target_env; |
| if (!spvParseTargetEnv(target_env_str, &target_env)) { |
| spvtools::Error(opt_diagnostic, nullptr, {}, |
| "Invalid value passed to --target-env"); |
| return {OPT_STOP, 1}; |
| } |
| optimizer->SetTargetEnv(target_env); |
| } else if (0 == strcmp(cur_arg, "--validate-after-all")) { |
| optimizer->SetValidateAfterAll(true); |
| } else if (0 == strcmp(cur_arg, "--before-hlsl-legalization")) { |
| validator_options->SetBeforeHlslLegalization(true); |
| } else if (0 == strcmp(cur_arg, "--relax-logical-pointer")) { |
| validator_options->SetRelaxLogicalPointer(true); |
| } else if (0 == strcmp(cur_arg, "--relax-block-layout")) { |
| validator_options->SetRelaxBlockLayout(true); |
| } else if (0 == strcmp(cur_arg, "--scalar-block-layout")) { |
| validator_options->SetScalarBlockLayout(true); |
| } else if (0 == strcmp(cur_arg, "--workgroup-scalar-block-layout")) { |
| validator_options->SetWorkgroupScalarBlockLayout(true); |
| } else if (0 == strcmp(cur_arg, "--skip-block-layout")) { |
| validator_options->SetSkipBlockLayout(true); |
| } else if (0 == strcmp(cur_arg, "--relax-struct-store")) { |
| validator_options->SetRelaxStructStore(true); |
| } else { |
| // Some passes used to accept the form '--pass arg', canonicalize them |
| // to '--pass=arg'. |
| pass_flags.push_back(CanonicalizeFlag(argv, argc, &argi)); |
| |
| // If we were requested to legalize SPIR-V generated from the HLSL |
| // front-end, skip validation. |
| if (0 == strcmp(cur_arg, "--legalize-hlsl")) { |
| validator_options->SetBeforeHlslLegalization(true); |
| } |
| } |
| } else { |
| if (!*in_file) { |
| *in_file = cur_arg; |
| } else { |
| spvtools::Error(opt_diagnostic, nullptr, {}, |
| "More than one input file specified"); |
| return {OPT_STOP, 1}; |
| } |
| } |
| } |
| |
| if (!optimizer->RegisterPassesFromFlags(pass_flags)) { |
| return {OPT_STOP, 1}; |
| } |
| |
| return {OPT_CONTINUE, 0}; |
| } |
| |
| } // namespace |
| |
| int main(int argc, const char** argv) { |
| const char* in_file = nullptr; |
| const char* out_file = nullptr; |
| |
| spv_target_env target_env = kDefaultEnvironment; |
| |
| spvtools::Optimizer optimizer(target_env); |
| optimizer.SetMessageConsumer(spvtools::utils::CLIMessageConsumer); |
| |
| spvtools::ValidatorOptions validator_options; |
| spvtools::OptimizerOptions optimizer_options; |
| OptStatus status = ParseFlags(argc, argv, &optimizer, &in_file, &out_file, |
| &validator_options, &optimizer_options); |
| optimizer_options.set_validator_options(validator_options); |
| |
| if (status.action == OPT_STOP) { |
| return status.code; |
| } |
| |
| if (out_file == nullptr) { |
| spvtools::Error(opt_diagnostic, nullptr, {}, "-o required"); |
| return 1; |
| } |
| |
| std::vector<uint32_t> binary; |
| if (!ReadBinaryFile<uint32_t>(in_file, &binary)) { |
| return 1; |
| } |
| |
| // By using the same vector as input and output, we save time in the case |
| // that there was no change. |
| bool ok = |
| optimizer.Run(binary.data(), binary.size(), &binary, optimizer_options); |
| |
| if (!WriteFile<uint32_t>(out_file, "wb", binary.data(), binary.size())) { |
| return 1; |
| } |
| |
| return ok ? 0 : 1; |
| } |
