mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-29 06:21:06 +00:00
5dcb576b69
Motivated by integrating spirv-reduce into spirv-fuzz, so that an added function can be made smaller during shrinking, this adds support in spirv-reduce for asking reduction to be restricted to the instructions of a single specified function.
590 lines
21 KiB
C++
590 lines
21 KiB
C++
// Copyright (c) 2018 Google LLC
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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/reduce/reducer.h"
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#include "source/reduce/reduction_opportunity.h"
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#include "source/reduce/remove_instruction_reduction_opportunity.h"
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#include "test/reduce/reduce_test_util.h"
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namespace spvtools {
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namespace reduce {
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namespace {
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using opt::Function;
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using opt::IRContext;
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using opt::Instruction;
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// A reduction opportunity finder that finds opportunities to remove global
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// values regardless of whether they are referenced. This is very likely to make
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// the resulting module invalid. We use this to test the reducer's behavior in
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// the scenario where a bad reduction pass leads to an invalid module.
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class BlindlyRemoveGlobalValuesReductionOpportunityFinder
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: public ReductionOpportunityFinder {
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public:
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BlindlyRemoveGlobalValuesReductionOpportunityFinder() = default;
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~BlindlyRemoveGlobalValuesReductionOpportunityFinder() override = default;
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// The name of this pass.
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std::string GetName() const final { return "BlindlyRemoveGlobalValuesPass"; }
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// Finds opportunities to remove all global values. Assuming they are all
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// referenced (directly or indirectly) from elsewhere in the module, each such
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// opportunity will make the module invalid.
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std::vector<std::unique_ptr<ReductionOpportunity>> GetAvailableOpportunities(
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IRContext* context, uint32_t /*unused*/) const final {
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std::vector<std::unique_ptr<ReductionOpportunity>> result;
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for (auto& inst : context->module()->types_values()) {
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if (inst.HasResultId()) {
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result.push_back(
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MakeUnique<RemoveInstructionReductionOpportunity>(&inst));
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}
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}
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return result;
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}
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};
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// A reduction opportunity that exists at the start of every function whose
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// first instruction is an OpVariable instruction. When applied, the OpVariable
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// instruction is duplicated (with a fresh result id). This allows each
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// reduction step to increase the number of variables to check if the validator
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// limits are enforced.
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class OpVariableDuplicatorReductionOpportunity : public ReductionOpportunity {
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public:
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OpVariableDuplicatorReductionOpportunity(Function* function)
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: function_(function) {}
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bool PreconditionHolds() override {
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Instruction* first_instruction = &*function_->begin()[0].begin();
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return first_instruction->opcode() == SpvOpVariable;
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}
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protected:
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void Apply() override {
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// Duplicate the first OpVariable instruction.
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Instruction* first_instruction = &*function_->begin()[0].begin();
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assert(first_instruction->opcode() == SpvOpVariable &&
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"Expected first instruction to be OpVariable");
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IRContext* context = first_instruction->context();
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Instruction* cloned_instruction = first_instruction->Clone(context);
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cloned_instruction->SetResultId(context->TakeNextId());
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cloned_instruction->InsertBefore(first_instruction);
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}
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private:
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Function* function_;
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};
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// A reduction opportunity finder that finds
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// OpVariableDuplicatorReductionOpportunity.
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class OpVariableDuplicatorReductionOpportunityFinder
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: public ReductionOpportunityFinder {
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public:
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OpVariableDuplicatorReductionOpportunityFinder() = default;
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~OpVariableDuplicatorReductionOpportunityFinder() override = default;
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std::string GetName() const final {
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return "LocalVariableAdderReductionOpportunityFinder";
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}
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std::vector<std::unique_ptr<ReductionOpportunity>> GetAvailableOpportunities(
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IRContext* context, uint32_t /*unused*/) const final {
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std::vector<std::unique_ptr<ReductionOpportunity>> result;
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for (auto& function : *context->module()) {
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Instruction* first_instruction = &*function.begin()[0].begin();
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if (first_instruction->opcode() == SpvOpVariable) {
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result.push_back(
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MakeUnique<OpVariableDuplicatorReductionOpportunity>(&function));
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}
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}
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return result;
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}
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};
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TEST(ValidationDuringReductionTest, CheckInvalidPassMakesNoProgress) {
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// A module whose global values are all referenced, so that any application of
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// MakeModuleInvalidPass will make the module invalid. Check that the reducer
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// makes no progress, as every step will be invalid and treated as
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// uninteresting.
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std::string original = R"(
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OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %4 "main" %60
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OpExecutionMode %4 OriginUpperLeft
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OpSource ESSL 310
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OpName %4 "main"
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OpName %16 "buf2"
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OpMemberName %16 0 "i"
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OpName %18 ""
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OpName %25 "buf1"
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OpMemberName %25 0 "f"
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OpName %27 ""
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OpName %60 "_GLF_color"
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OpMemberDecorate %16 0 Offset 0
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OpDecorate %16 Block
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OpDecorate %18 DescriptorSet 0
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OpDecorate %18 Binding 2
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OpMemberDecorate %25 0 Offset 0
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OpDecorate %25 Block
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OpDecorate %27 DescriptorSet 0
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OpDecorate %27 Binding 1
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OpDecorate %60 Location 0
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%2 = OpTypeVoid
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%3 = OpTypeFunction %2
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%6 = OpTypeInt 32 1
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%9 = OpConstant %6 0
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%16 = OpTypeStruct %6
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%17 = OpTypePointer Uniform %16
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%18 = OpVariable %17 Uniform
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%19 = OpTypePointer Uniform %6
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%22 = OpTypeBool
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%24 = OpTypeFloat 32
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%25 = OpTypeStruct %24
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%26 = OpTypePointer Uniform %25
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%27 = OpVariable %26 Uniform
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%28 = OpTypePointer Uniform %24
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%31 = OpConstant %24 2
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%56 = OpConstant %6 1
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%58 = OpTypeVector %24 4
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%59 = OpTypePointer Output %58
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%60 = OpVariable %59 Output
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%72 = OpUndef %24
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%74 = OpUndef %6
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%4 = OpFunction %2 None %3
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%5 = OpLabel
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OpBranch %10
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%10 = OpLabel
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%73 = OpPhi %6 %74 %5 %77 %34
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%71 = OpPhi %24 %72 %5 %76 %34
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%70 = OpPhi %6 %9 %5 %57 %34
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%20 = OpAccessChain %19 %18 %9
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%21 = OpLoad %6 %20
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%23 = OpSLessThan %22 %70 %21
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OpLoopMerge %12 %34 None
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OpBranchConditional %23 %11 %12
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%11 = OpLabel
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%29 = OpAccessChain %28 %27 %9
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%30 = OpLoad %24 %29
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%32 = OpFOrdGreaterThan %22 %30 %31
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OpSelectionMerge %90 None
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OpBranchConditional %32 %33 %46
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%33 = OpLabel
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%40 = OpFAdd %24 %71 %30
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%45 = OpISub %6 %73 %21
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OpBranch %90
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%46 = OpLabel
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%50 = OpFMul %24 %71 %30
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%54 = OpSDiv %6 %73 %21
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OpBranch %90
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%90 = OpLabel
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%77 = OpPhi %6 %45 %33 %54 %46
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%76 = OpPhi %24 %40 %33 %50 %46
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OpBranch %34
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%34 = OpLabel
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%57 = OpIAdd %6 %70 %56
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OpBranch %10
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%12 = OpLabel
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%61 = OpAccessChain %28 %27 %9
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%62 = OpLoad %24 %61
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%66 = OpConvertSToF %24 %21
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%68 = OpConvertSToF %24 %73
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%69 = OpCompositeConstruct %58 %62 %71 %66 %68
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OpStore %60 %69
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OpReturn
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OpFunctionEnd
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)";
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spv_target_env env = SPV_ENV_UNIVERSAL_1_3;
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Reducer reducer(env);
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reducer.SetMessageConsumer(NopDiagnostic);
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// Say that every module is interesting.
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reducer.SetInterestingnessFunction(
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[](const std::vector<uint32_t>&, uint32_t) -> bool { return true; });
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reducer.AddReductionPass(
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MakeUnique<BlindlyRemoveGlobalValuesReductionOpportunityFinder>());
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std::vector<uint32_t> binary_in;
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SpirvTools t(env);
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ASSERT_TRUE(t.Assemble(original, &binary_in, kReduceAssembleOption));
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std::vector<uint32_t> binary_out;
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spvtools::ReducerOptions reducer_options;
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reducer_options.set_step_limit(500);
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// Don't fail on a validation error; just treat it as uninteresting.
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reducer_options.set_fail_on_validation_error(false);
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spvtools::ValidatorOptions validator_options;
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Reducer::ReductionResultStatus status = reducer.Run(
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std::move(binary_in), &binary_out, reducer_options, validator_options);
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ASSERT_EQ(status, Reducer::ReductionResultStatus::kComplete);
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// The reducer should have no impact.
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CheckEqual(env, original, binary_out);
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}
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TEST(ValidationDuringReductionTest, CheckNotAlwaysInvalidCanMakeProgress) {
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// A module with just one unreferenced global value. All but one application
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// of MakeModuleInvalidPass will make the module invalid.
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std::string original = R"(
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OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %4 "main" %60
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OpExecutionMode %4 OriginUpperLeft
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OpSource ESSL 310
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OpName %4 "main"
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OpName %16 "buf2"
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OpMemberName %16 0 "i"
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OpName %18 ""
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OpName %25 "buf1"
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OpMemberName %25 0 "f"
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OpName %27 ""
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OpName %60 "_GLF_color"
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OpMemberDecorate %16 0 Offset 0
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OpDecorate %16 Block
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OpDecorate %18 DescriptorSet 0
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OpDecorate %18 Binding 2
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OpMemberDecorate %25 0 Offset 0
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OpDecorate %25 Block
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OpDecorate %27 DescriptorSet 0
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OpDecorate %27 Binding 1
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OpDecorate %60 Location 0
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%2 = OpTypeVoid
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%3 = OpTypeFunction %2
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%6 = OpTypeInt 32 1
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%9 = OpConstant %6 0
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%16 = OpTypeStruct %6
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%17 = OpTypePointer Uniform %16
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%18 = OpVariable %17 Uniform
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%19 = OpTypePointer Uniform %6
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%22 = OpTypeBool
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%24 = OpTypeFloat 32
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%25 = OpTypeStruct %24
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%26 = OpTypePointer Uniform %25
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%27 = OpVariable %26 Uniform
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%28 = OpTypePointer Uniform %24
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%31 = OpConstant %24 2
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%56 = OpConstant %6 1
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%1000 = OpConstant %6 1000 ; It should be possible to remove this instruction without making the module invalid.
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%58 = OpTypeVector %24 4
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%59 = OpTypePointer Output %58
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%60 = OpVariable %59 Output
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%72 = OpUndef %24
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%74 = OpUndef %6
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%4 = OpFunction %2 None %3
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%5 = OpLabel
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OpBranch %10
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%10 = OpLabel
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%73 = OpPhi %6 %74 %5 %77 %34
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%71 = OpPhi %24 %72 %5 %76 %34
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%70 = OpPhi %6 %9 %5 %57 %34
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%20 = OpAccessChain %19 %18 %9
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%21 = OpLoad %6 %20
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%23 = OpSLessThan %22 %70 %21
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OpLoopMerge %12 %34 None
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OpBranchConditional %23 %11 %12
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%11 = OpLabel
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%29 = OpAccessChain %28 %27 %9
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%30 = OpLoad %24 %29
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%32 = OpFOrdGreaterThan %22 %30 %31
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OpSelectionMerge %90 None
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OpBranchConditional %32 %33 %46
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%33 = OpLabel
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%40 = OpFAdd %24 %71 %30
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%45 = OpISub %6 %73 %21
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OpBranch %90
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%46 = OpLabel
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%50 = OpFMul %24 %71 %30
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%54 = OpSDiv %6 %73 %21
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OpBranch %90
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%90 = OpLabel
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%77 = OpPhi %6 %45 %33 %54 %46
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%76 = OpPhi %24 %40 %33 %50 %46
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OpBranch %34
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%34 = OpLabel
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%57 = OpIAdd %6 %70 %56
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OpBranch %10
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%12 = OpLabel
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%61 = OpAccessChain %28 %27 %9
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%62 = OpLoad %24 %61
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%66 = OpConvertSToF %24 %21
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%68 = OpConvertSToF %24 %73
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%69 = OpCompositeConstruct %58 %62 %71 %66 %68
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OpStore %60 %69
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OpReturn
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OpFunctionEnd
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)";
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// This is the same as the original, except that the constant declaration of
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// 1000 is gone.
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std::string expected = R"(
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OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %4 "main" %60
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OpExecutionMode %4 OriginUpperLeft
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OpSource ESSL 310
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OpName %4 "main"
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OpName %16 "buf2"
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OpMemberName %16 0 "i"
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OpName %18 ""
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OpName %25 "buf1"
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OpMemberName %25 0 "f"
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OpName %27 ""
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OpName %60 "_GLF_color"
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OpMemberDecorate %16 0 Offset 0
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OpDecorate %16 Block
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OpDecorate %18 DescriptorSet 0
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OpDecorate %18 Binding 2
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OpMemberDecorate %25 0 Offset 0
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OpDecorate %25 Block
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OpDecorate %27 DescriptorSet 0
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OpDecorate %27 Binding 1
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OpDecorate %60 Location 0
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%2 = OpTypeVoid
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%3 = OpTypeFunction %2
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%6 = OpTypeInt 32 1
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%9 = OpConstant %6 0
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%16 = OpTypeStruct %6
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%17 = OpTypePointer Uniform %16
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%18 = OpVariable %17 Uniform
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%19 = OpTypePointer Uniform %6
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%22 = OpTypeBool
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%24 = OpTypeFloat 32
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%25 = OpTypeStruct %24
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%26 = OpTypePointer Uniform %25
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%27 = OpVariable %26 Uniform
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%28 = OpTypePointer Uniform %24
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%31 = OpConstant %24 2
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%56 = OpConstant %6 1
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%58 = OpTypeVector %24 4
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%59 = OpTypePointer Output %58
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%60 = OpVariable %59 Output
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%72 = OpUndef %24
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%74 = OpUndef %6
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%4 = OpFunction %2 None %3
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%5 = OpLabel
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OpBranch %10
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%10 = OpLabel
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%73 = OpPhi %6 %74 %5 %77 %34
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%71 = OpPhi %24 %72 %5 %76 %34
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%70 = OpPhi %6 %9 %5 %57 %34
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%20 = OpAccessChain %19 %18 %9
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%21 = OpLoad %6 %20
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%23 = OpSLessThan %22 %70 %21
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OpLoopMerge %12 %34 None
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OpBranchConditional %23 %11 %12
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%11 = OpLabel
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%29 = OpAccessChain %28 %27 %9
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%30 = OpLoad %24 %29
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%32 = OpFOrdGreaterThan %22 %30 %31
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OpSelectionMerge %90 None
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OpBranchConditional %32 %33 %46
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%33 = OpLabel
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%40 = OpFAdd %24 %71 %30
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%45 = OpISub %6 %73 %21
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OpBranch %90
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%46 = OpLabel
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%50 = OpFMul %24 %71 %30
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%54 = OpSDiv %6 %73 %21
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OpBranch %90
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%90 = OpLabel
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%77 = OpPhi %6 %45 %33 %54 %46
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%76 = OpPhi %24 %40 %33 %50 %46
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OpBranch %34
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%34 = OpLabel
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%57 = OpIAdd %6 %70 %56
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OpBranch %10
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%12 = OpLabel
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%61 = OpAccessChain %28 %27 %9
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%62 = OpLoad %24 %61
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%66 = OpConvertSToF %24 %21
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%68 = OpConvertSToF %24 %73
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%69 = OpCompositeConstruct %58 %62 %71 %66 %68
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OpStore %60 %69
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OpReturn
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OpFunctionEnd
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)";
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spv_target_env env = SPV_ENV_UNIVERSAL_1_3;
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Reducer reducer(env);
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reducer.SetMessageConsumer(NopDiagnostic);
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// Say that every module is interesting.
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reducer.SetInterestingnessFunction(
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[](const std::vector<uint32_t>&, uint32_t) -> bool { return true; });
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reducer.AddReductionPass(
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MakeUnique<BlindlyRemoveGlobalValuesReductionOpportunityFinder>());
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std::vector<uint32_t> binary_in;
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SpirvTools t(env);
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ASSERT_TRUE(t.Assemble(original, &binary_in, kReduceAssembleOption));
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std::vector<uint32_t> binary_out;
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spvtools::ReducerOptions reducer_options;
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reducer_options.set_step_limit(500);
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// Don't fail on a validation error; just treat it as uninteresting.
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reducer_options.set_fail_on_validation_error(false);
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spvtools::ValidatorOptions validator_options;
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Reducer::ReductionResultStatus status = reducer.Run(
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std::move(binary_in), &binary_out, reducer_options, validator_options);
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ASSERT_EQ(status, Reducer::ReductionResultStatus::kComplete);
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CheckEqual(env, expected, binary_out);
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}
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// Sets up a Reducer for use in the CheckValidationOptions test; avoids
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// repetition.
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void SetupReducerForCheckValidationOptions(Reducer* reducer) {
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reducer->SetMessageConsumer(NopDiagnostic);
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// Say that every module is interesting.
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reducer->SetInterestingnessFunction(
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[](const std::vector<uint32_t>&, uint32_t) -> bool { return true; });
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// Each "reduction" step will duplicate the first OpVariable instruction in
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// the function.
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reducer->AddReductionPass(
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MakeUnique<OpVariableDuplicatorReductionOpportunityFinder>());
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}
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TEST(ValidationDuringReductionTest, CheckValidationOptions) {
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// A module that only validates when the "skip-block-layout" validator option
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// is used. Also, the entry point's first instruction creates a local
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// variable; this instruction will be duplicated on each reduction step.
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std::string original = R"(
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OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Vertex %2 "Main" %3
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OpSource HLSL 600
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OpDecorate %3 BuiltIn Position
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OpDecorate %4 DescriptorSet 0
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OpDecorate %4 Binding 99
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OpDecorate %5 ArrayStride 16
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OpMemberDecorate %6 0 Offset 0
|
|
OpMemberDecorate %6 1 Offset 32
|
|
OpMemberDecorate %6 1 MatrixStride 16
|
|
OpMemberDecorate %6 1 ColMajor
|
|
OpMemberDecorate %6 2 Offset 96
|
|
OpMemberDecorate %6 3 Offset 100
|
|
OpMemberDecorate %6 4 Offset 112
|
|
OpMemberDecorate %6 4 MatrixStride 16
|
|
OpMemberDecorate %6 4 ColMajor
|
|
OpMemberDecorate %6 5 Offset 176
|
|
OpDecorate %6 Block
|
|
%7 = OpTypeFloat 32
|
|
%8 = OpTypeVector %7 4
|
|
%9 = OpTypeMatrix %8 4
|
|
%10 = OpTypeVector %7 2
|
|
%11 = OpTypeInt 32 1
|
|
%12 = OpTypeInt 32 0
|
|
%13 = OpConstant %12 2
|
|
%14 = OpConstant %11 1
|
|
%15 = OpConstant %11 5
|
|
%5 = OpTypeArray %8 %13
|
|
%6 = OpTypeStruct %5 %9 %12 %10 %9 %7
|
|
%16 = OpTypePointer Uniform %6
|
|
%17 = OpTypePointer Output %8
|
|
%18 = OpTypeVoid
|
|
%19 = OpTypeFunction %18
|
|
%20 = OpTypePointer Uniform %7
|
|
%4 = OpVariable %16 Uniform
|
|
%3 = OpVariable %17 Output
|
|
%21 = OpTypePointer Function %11
|
|
%2 = OpFunction %18 None %19
|
|
%22 = OpLabel
|
|
%23 = OpVariable %21 Function
|
|
%24 = OpAccessChain %20 %4 %15
|
|
%25 = OpLoad %7 %24
|
|
%26 = OpCompositeConstruct %8 %25 %25 %25 %25
|
|
OpStore %3 %26
|
|
OpReturn
|
|
OpFunctionEnd
|
|
)";
|
|
|
|
spv_target_env env = SPV_ENV_UNIVERSAL_1_3;
|
|
std::vector<uint32_t> binary_in;
|
|
SpirvTools t(env);
|
|
|
|
ASSERT_TRUE(t.Assemble(original, &binary_in, kReduceAssembleOption));
|
|
std::vector<uint32_t> binary_out;
|
|
spvtools::ReducerOptions reducer_options;
|
|
spvtools::ValidatorOptions validator_options;
|
|
|
|
reducer_options.set_step_limit(3);
|
|
reducer_options.set_fail_on_validation_error(true);
|
|
|
|
// Reduction should fail because the initial state is invalid without the
|
|
// "skip-block-layout" validator option. Note that the interestingness test
|
|
// always returns true.
|
|
{
|
|
Reducer reducer(env);
|
|
SetupReducerForCheckValidationOptions(&reducer);
|
|
|
|
Reducer::ReductionResultStatus status =
|
|
reducer.Run(std::vector<uint32_t>(binary_in), &binary_out,
|
|
reducer_options, validator_options);
|
|
|
|
ASSERT_EQ(status, Reducer::ReductionResultStatus::kInitialStateInvalid);
|
|
}
|
|
|
|
// Try again with validator option.
|
|
validator_options.SetSkipBlockLayout(true);
|
|
|
|
// Reduction should hit step limit; module is seen as valid, interestingness
|
|
// test always succeeds, and the finder yields infinite opportunities.
|
|
{
|
|
Reducer reducer(env);
|
|
SetupReducerForCheckValidationOptions(&reducer);
|
|
|
|
Reducer::ReductionResultStatus status =
|
|
reducer.Run(std::vector<uint32_t>(binary_in), &binary_out,
|
|
reducer_options, validator_options);
|
|
|
|
ASSERT_EQ(status, Reducer::ReductionResultStatus::kReachedStepLimit);
|
|
}
|
|
|
|
// Now set a limit on the number of local variables.
|
|
validator_options.SetUniversalLimit(spv_validator_limit_max_local_variables,
|
|
2);
|
|
|
|
// Reduction should now fail due to reaching an invalid state; after one step,
|
|
// a local variable is added and the module becomes "invalid" given the
|
|
// validator limits.
|
|
{
|
|
Reducer reducer(env);
|
|
SetupReducerForCheckValidationOptions(&reducer);
|
|
|
|
Reducer::ReductionResultStatus status =
|
|
reducer.Run(std::vector<uint32_t>(binary_in), &binary_out,
|
|
reducer_options, validator_options);
|
|
|
|
ASSERT_EQ(status, Reducer::ReductionResultStatus::kStateInvalid);
|
|
}
|
|
}
|
|
|
|
} // namespace
|
|
} // namespace reduce
|
|
} // namespace spvtools
|