| // Copyright (c) 2017 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 "source/opt/ir_context.h" |
| |
| #include <cstring> |
| |
| #include "source/latest_version_glsl_std_450_header.h" |
| #include "source/opt/log.h" |
| #include "source/opt/mem_pass.h" |
| #include "source/opt/reflect.h" |
| |
| namespace { |
| |
| static const int kSpvDecorateTargetIdInIdx = 0; |
| static const int kSpvDecorateDecorationInIdx = 1; |
| static const int kSpvDecorateBuiltinInIdx = 2; |
| static const int kEntryPointInterfaceInIdx = 3; |
| static const int kEntryPointFunctionIdInIdx = 1; |
| |
| } // anonymous namespace |
| |
| namespace spvtools { |
| namespace opt { |
| |
| void IRContext::BuildInvalidAnalyses(IRContext::Analysis set) { |
| if (set & kAnalysisDefUse) { |
| BuildDefUseManager(); |
| } |
| if (set & kAnalysisInstrToBlockMapping) { |
| BuildInstrToBlockMapping(); |
| } |
| if (set & kAnalysisDecorations) { |
| BuildDecorationManager(); |
| } |
| if (set & kAnalysisCFG) { |
| BuildCFG(); |
| } |
| if (set & kAnalysisDominatorAnalysis) { |
| ResetDominatorAnalysis(); |
| } |
| if (set & kAnalysisLoopAnalysis) { |
| ResetLoopAnalysis(); |
| } |
| if (set & kAnalysisBuiltinVarId) { |
| ResetBuiltinAnalysis(); |
| } |
| if (set & kAnalysisNameMap) { |
| BuildIdToNameMap(); |
| } |
| if (set & kAnalysisScalarEvolution) { |
| BuildScalarEvolutionAnalysis(); |
| } |
| if (set & kAnalysisRegisterPressure) { |
| BuildRegPressureAnalysis(); |
| } |
| if (set & kAnalysisValueNumberTable) { |
| BuildValueNumberTable(); |
| } |
| if (set & kAnalysisStructuredCFG) { |
| BuildStructuredCFGAnalysis(); |
| } |
| if (set & kAnalysisIdToFuncMapping) { |
| BuildIdToFuncMapping(); |
| } |
| if (set & kAnalysisConstants) { |
| BuildConstantManager(); |
| } |
| if (set & kAnalysisTypes) { |
| BuildTypeManager(); |
| } |
| } |
| |
| void IRContext::InvalidateAnalysesExceptFor( |
| IRContext::Analysis preserved_analyses) { |
| uint32_t analyses_to_invalidate = valid_analyses_ & (~preserved_analyses); |
| InvalidateAnalyses(static_cast<IRContext::Analysis>(analyses_to_invalidate)); |
| } |
| |
| void IRContext::InvalidateAnalyses(IRContext::Analysis analyses_to_invalidate) { |
| if (analyses_to_invalidate & kAnalysisDefUse) { |
| def_use_mgr_.reset(nullptr); |
| } |
| if (analyses_to_invalidate & kAnalysisInstrToBlockMapping) { |
| instr_to_block_.clear(); |
| } |
| if (analyses_to_invalidate & kAnalysisDecorations) { |
| decoration_mgr_.reset(nullptr); |
| } |
| if (analyses_to_invalidate & kAnalysisCombinators) { |
| combinator_ops_.clear(); |
| } |
| if (analyses_to_invalidate & kAnalysisBuiltinVarId) { |
| builtin_var_id_map_.clear(); |
| } |
| if (analyses_to_invalidate & kAnalysisCFG) { |
| cfg_.reset(nullptr); |
| } |
| if (analyses_to_invalidate & kAnalysisDominatorAnalysis) { |
| dominator_trees_.clear(); |
| post_dominator_trees_.clear(); |
| } |
| if (analyses_to_invalidate & kAnalysisNameMap) { |
| id_to_name_.reset(nullptr); |
| } |
| if (analyses_to_invalidate & kAnalysisValueNumberTable) { |
| vn_table_.reset(nullptr); |
| } |
| if (analyses_to_invalidate & kAnalysisStructuredCFG) { |
| struct_cfg_analysis_.reset(nullptr); |
| } |
| if (analyses_to_invalidate & kAnalysisIdToFuncMapping) { |
| id_to_func_.clear(); |
| } |
| if (analyses_to_invalidate & kAnalysisConstants) { |
| constant_mgr_.reset(nullptr); |
| } |
| if (analyses_to_invalidate & kAnalysisTypes) { |
| // The ConstantManager contains Type pointers. If the TypeManager goes |
| // away, the ConstantManager has to go away. |
| constant_mgr_.reset(nullptr); |
| type_mgr_.reset(nullptr); |
| } |
| |
| valid_analyses_ = Analysis(valid_analyses_ & ~analyses_to_invalidate); |
| } |
| |
| Instruction* IRContext::KillInst(Instruction* inst) { |
| if (!inst) { |
| return nullptr; |
| } |
| |
| KillNamesAndDecorates(inst); |
| |
| if (AreAnalysesValid(kAnalysisDefUse)) { |
| get_def_use_mgr()->ClearInst(inst); |
| } |
| if (AreAnalysesValid(kAnalysisInstrToBlockMapping)) { |
| instr_to_block_.erase(inst); |
| } |
| if (AreAnalysesValid(kAnalysisDecorations)) { |
| if (inst->IsDecoration()) { |
| decoration_mgr_->RemoveDecoration(inst); |
| } |
| } |
| |
| if (type_mgr_ && IsTypeInst(inst->opcode())) { |
| type_mgr_->RemoveId(inst->result_id()); |
| } |
| |
| if (constant_mgr_ && IsConstantInst(inst->opcode())) { |
| constant_mgr_->RemoveId(inst->result_id()); |
| } |
| |
| RemoveFromIdToName(inst); |
| |
| Instruction* next_instruction = nullptr; |
| if (inst->IsInAList()) { |
| next_instruction = inst->NextNode(); |
| inst->RemoveFromList(); |
| delete inst; |
| } else { |
| // Needed for instructions that are not part of a list like OpLabels, |
| // OpFunction, OpFunctionEnd, etc.. |
| inst->ToNop(); |
| } |
| return next_instruction; |
| } |
| |
| bool IRContext::KillDef(uint32_t id) { |
| Instruction* def = get_def_use_mgr()->GetDef(id); |
| if (def != nullptr) { |
| KillInst(def); |
| return true; |
| } |
| return false; |
| } |
| |
| bool IRContext::ReplaceAllUsesWith(uint32_t before, uint32_t after) { |
| if (before == after) return false; |
| |
| // Ensure that |after| has been registered as def. |
| assert(get_def_use_mgr()->GetDef(after) && |
| "'after' is not a registered def."); |
| |
| std::vector<std::pair<Instruction*, uint32_t>> uses_to_update; |
| get_def_use_mgr()->ForEachUse( |
| before, [&uses_to_update](Instruction* user, uint32_t index) { |
| uses_to_update.emplace_back(user, index); |
| }); |
| |
| Instruction* prev = nullptr; |
| for (auto p : uses_to_update) { |
| Instruction* user = p.first; |
| uint32_t index = p.second; |
| if (prev == nullptr || prev != user) { |
| ForgetUses(user); |
| prev = user; |
| } |
| const uint32_t type_result_id_count = |
| (user->result_id() != 0) + (user->type_id() != 0); |
| |
| if (index < type_result_id_count) { |
| // Update the type_id. Note that result id is immutable so it should |
| // never be updated. |
| if (user->type_id() != 0 && index == 0) { |
| user->SetResultType(after); |
| } else if (user->type_id() == 0) { |
| SPIRV_ASSERT(consumer_, false, |
| "Result type id considered as use while the instruction " |
| "doesn't have a result type id."); |
| (void)consumer_; // Makes the compiler happy for release build. |
| } else { |
| SPIRV_ASSERT(consumer_, false, |
| "Trying setting the immutable result id."); |
| } |
| } else { |
| // Update an in-operand. |
| uint32_t in_operand_pos = index - type_result_id_count; |
| // Make the modification in the instruction. |
| user->SetInOperand(in_operand_pos, {after}); |
| } |
| AnalyzeUses(user); |
| } |
| |
| return true; |
| } |
| |
| bool IRContext::IsConsistent() { |
| #ifndef SPIRV_CHECK_CONTEXT |
| return true; |
| #endif |
| |
| if (AreAnalysesValid(kAnalysisDefUse)) { |
| analysis::DefUseManager new_def_use(module()); |
| if (*get_def_use_mgr() != new_def_use) { |
| return false; |
| } |
| } |
| |
| if (AreAnalysesValid(kAnalysisInstrToBlockMapping)) { |
| for (auto& func : *module()) { |
| for (auto& block : func) { |
| if (!block.WhileEachInst([this, &block](Instruction* inst) { |
| if (get_instr_block(inst) != &block) { |
| return false; |
| } |
| return true; |
| })) |
| return false; |
| } |
| } |
| } |
| |
| if (!CheckCFG()) { |
| return false; |
| } |
| |
| if (AreAnalysesValid(kAnalysisDecorations)) { |
| analysis::DecorationManager* dec_mgr = get_decoration_mgr(); |
| analysis::DecorationManager current(module()); |
| |
| if (*dec_mgr != current) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| void IRContext::ForgetUses(Instruction* inst) { |
| if (AreAnalysesValid(kAnalysisDefUse)) { |
| get_def_use_mgr()->EraseUseRecordsOfOperandIds(inst); |
| } |
| if (AreAnalysesValid(kAnalysisDecorations)) { |
| if (inst->IsDecoration()) { |
| get_decoration_mgr()->RemoveDecoration(inst); |
| } |
| } |
| RemoveFromIdToName(inst); |
| } |
| |
| void IRContext::AnalyzeUses(Instruction* inst) { |
| if (AreAnalysesValid(kAnalysisDefUse)) { |
| get_def_use_mgr()->AnalyzeInstUse(inst); |
| } |
| if (AreAnalysesValid(kAnalysisDecorations)) { |
| if (inst->IsDecoration()) { |
| get_decoration_mgr()->AddDecoration(inst); |
| } |
| } |
| if (id_to_name_ && |
| (inst->opcode() == SpvOpName || inst->opcode() == SpvOpMemberName)) { |
| id_to_name_->insert({inst->GetSingleWordInOperand(0), inst}); |
| } |
| } |
| |
| void IRContext::KillNamesAndDecorates(uint32_t id) { |
| analysis::DecorationManager* dec_mgr = get_decoration_mgr(); |
| dec_mgr->RemoveDecorationsFrom(id); |
| |
| std::vector<Instruction*> name_to_kill; |
| for (auto name : GetNames(id)) { |
| name_to_kill.push_back(name.second); |
| } |
| for (Instruction* name_inst : name_to_kill) { |
| KillInst(name_inst); |
| } |
| } |
| |
| void IRContext::KillNamesAndDecorates(Instruction* inst) { |
| const uint32_t rId = inst->result_id(); |
| if (rId == 0) return; |
| KillNamesAndDecorates(rId); |
| } |
| |
| void IRContext::AddCombinatorsForCapability(uint32_t capability) { |
| if (capability == SpvCapabilityShader) { |
| combinator_ops_[0].insert({SpvOpNop, |
| SpvOpUndef, |
| SpvOpConstant, |
| SpvOpConstantTrue, |
| SpvOpConstantFalse, |
| SpvOpConstantComposite, |
| SpvOpConstantSampler, |
| SpvOpConstantNull, |
| SpvOpTypeVoid, |
| SpvOpTypeBool, |
| SpvOpTypeInt, |
| SpvOpTypeFloat, |
| SpvOpTypeVector, |
| SpvOpTypeMatrix, |
| SpvOpTypeImage, |
| SpvOpTypeSampler, |
| SpvOpTypeSampledImage, |
| SpvOpTypeAccelerationStructureNV, |
| SpvOpTypeArray, |
| SpvOpTypeRuntimeArray, |
| SpvOpTypeStruct, |
| SpvOpTypeOpaque, |
| SpvOpTypePointer, |
| SpvOpTypeFunction, |
| SpvOpTypeEvent, |
| SpvOpTypeDeviceEvent, |
| SpvOpTypeReserveId, |
| SpvOpTypeQueue, |
| SpvOpTypePipe, |
| SpvOpTypeForwardPointer, |
| SpvOpVariable, |
| SpvOpImageTexelPointer, |
| SpvOpLoad, |
| SpvOpAccessChain, |
| SpvOpInBoundsAccessChain, |
| SpvOpArrayLength, |
| SpvOpVectorExtractDynamic, |
| SpvOpVectorInsertDynamic, |
| SpvOpVectorShuffle, |
| SpvOpCompositeConstruct, |
| SpvOpCompositeExtract, |
| SpvOpCompositeInsert, |
| SpvOpCopyObject, |
| SpvOpTranspose, |
| SpvOpSampledImage, |
| SpvOpImageSampleImplicitLod, |
| SpvOpImageSampleExplicitLod, |
| SpvOpImageSampleDrefImplicitLod, |
| SpvOpImageSampleDrefExplicitLod, |
| SpvOpImageSampleProjImplicitLod, |
| SpvOpImageSampleProjExplicitLod, |
| SpvOpImageSampleProjDrefImplicitLod, |
| SpvOpImageSampleProjDrefExplicitLod, |
| SpvOpImageFetch, |
| SpvOpImageGather, |
| SpvOpImageDrefGather, |
| SpvOpImageRead, |
| SpvOpImage, |
| SpvOpImageQueryFormat, |
| SpvOpImageQueryOrder, |
| SpvOpImageQuerySizeLod, |
| SpvOpImageQuerySize, |
| SpvOpImageQueryLevels, |
| SpvOpImageQuerySamples, |
| SpvOpConvertFToU, |
| SpvOpConvertFToS, |
| SpvOpConvertSToF, |
| SpvOpConvertUToF, |
| SpvOpUConvert, |
| SpvOpSConvert, |
| SpvOpFConvert, |
| SpvOpQuantizeToF16, |
| SpvOpBitcast, |
| SpvOpSNegate, |
| SpvOpFNegate, |
| SpvOpIAdd, |
| SpvOpFAdd, |
| SpvOpISub, |
| SpvOpFSub, |
| SpvOpIMul, |
| SpvOpFMul, |
| SpvOpUDiv, |
| SpvOpSDiv, |
| SpvOpFDiv, |
| SpvOpUMod, |
| SpvOpSRem, |
| SpvOpSMod, |
| SpvOpFRem, |
| SpvOpFMod, |
| SpvOpVectorTimesScalar, |
| SpvOpMatrixTimesScalar, |
| SpvOpVectorTimesMatrix, |
| SpvOpMatrixTimesVector, |
| SpvOpMatrixTimesMatrix, |
| SpvOpOuterProduct, |
| SpvOpDot, |
| SpvOpIAddCarry, |
| SpvOpISubBorrow, |
| SpvOpUMulExtended, |
| SpvOpSMulExtended, |
| SpvOpAny, |
| SpvOpAll, |
| SpvOpIsNan, |
| SpvOpIsInf, |
| SpvOpLogicalEqual, |
| SpvOpLogicalNotEqual, |
| SpvOpLogicalOr, |
| SpvOpLogicalAnd, |
| SpvOpLogicalNot, |
| SpvOpSelect, |
| SpvOpIEqual, |
| SpvOpINotEqual, |
| SpvOpUGreaterThan, |
| SpvOpSGreaterThan, |
| SpvOpUGreaterThanEqual, |
| SpvOpSGreaterThanEqual, |
| SpvOpULessThan, |
| SpvOpSLessThan, |
| SpvOpULessThanEqual, |
| SpvOpSLessThanEqual, |
| SpvOpFOrdEqual, |
| SpvOpFUnordEqual, |
| SpvOpFOrdNotEqual, |
| SpvOpFUnordNotEqual, |
| SpvOpFOrdLessThan, |
| SpvOpFUnordLessThan, |
| SpvOpFOrdGreaterThan, |
| SpvOpFUnordGreaterThan, |
| SpvOpFOrdLessThanEqual, |
| SpvOpFUnordLessThanEqual, |
| SpvOpFOrdGreaterThanEqual, |
| SpvOpFUnordGreaterThanEqual, |
| SpvOpShiftRightLogical, |
| SpvOpShiftRightArithmetic, |
| SpvOpShiftLeftLogical, |
| SpvOpBitwiseOr, |
| SpvOpBitwiseXor, |
| SpvOpBitwiseAnd, |
| SpvOpNot, |
| SpvOpBitFieldInsert, |
| SpvOpBitFieldSExtract, |
| SpvOpBitFieldUExtract, |
| SpvOpBitReverse, |
| SpvOpBitCount, |
| SpvOpPhi, |
| SpvOpImageSparseSampleImplicitLod, |
| SpvOpImageSparseSampleExplicitLod, |
| SpvOpImageSparseSampleDrefImplicitLod, |
| SpvOpImageSparseSampleDrefExplicitLod, |
| SpvOpImageSparseSampleProjImplicitLod, |
| SpvOpImageSparseSampleProjExplicitLod, |
| SpvOpImageSparseSampleProjDrefImplicitLod, |
| SpvOpImageSparseSampleProjDrefExplicitLod, |
| SpvOpImageSparseFetch, |
| SpvOpImageSparseGather, |
| SpvOpImageSparseDrefGather, |
| SpvOpImageSparseTexelsResident, |
| SpvOpImageSparseRead, |
| SpvOpSizeOf}); |
| } |
| } |
| |
| void IRContext::AddCombinatorsForExtension(Instruction* extension) { |
| assert(extension->opcode() == SpvOpExtInstImport && |
| "Expecting an import of an extension's instruction set."); |
| const char* extension_name = |
| reinterpret_cast<const char*>(&extension->GetInOperand(0).words[0]); |
| if (!strcmp(extension_name, "GLSL.std.450")) { |
| combinator_ops_[extension->result_id()] = {GLSLstd450Round, |
| GLSLstd450RoundEven, |
| GLSLstd450Trunc, |
| GLSLstd450FAbs, |
| GLSLstd450SAbs, |
| GLSLstd450FSign, |
| GLSLstd450SSign, |
| GLSLstd450Floor, |
| GLSLstd450Ceil, |
| GLSLstd450Fract, |
| GLSLstd450Radians, |
| GLSLstd450Degrees, |
| GLSLstd450Sin, |
| GLSLstd450Cos, |
| GLSLstd450Tan, |
| GLSLstd450Asin, |
| GLSLstd450Acos, |
| GLSLstd450Atan, |
| GLSLstd450Sinh, |
| GLSLstd450Cosh, |
| GLSLstd450Tanh, |
| GLSLstd450Asinh, |
| GLSLstd450Acosh, |
| GLSLstd450Atanh, |
| GLSLstd450Atan2, |
| GLSLstd450Pow, |
| GLSLstd450Exp, |
| GLSLstd450Log, |
| GLSLstd450Exp2, |
| GLSLstd450Log2, |
| GLSLstd450Sqrt, |
| GLSLstd450InverseSqrt, |
| GLSLstd450Determinant, |
| GLSLstd450MatrixInverse, |
| GLSLstd450ModfStruct, |
| GLSLstd450FMin, |
| GLSLstd450UMin, |
| GLSLstd450SMin, |
| GLSLstd450FMax, |
| GLSLstd450UMax, |
| GLSLstd450SMax, |
| GLSLstd450FClamp, |
| GLSLstd450UClamp, |
| GLSLstd450SClamp, |
| GLSLstd450FMix, |
| GLSLstd450IMix, |
| GLSLstd450Step, |
| GLSLstd450SmoothStep, |
| GLSLstd450Fma, |
| GLSLstd450FrexpStruct, |
| GLSLstd450Ldexp, |
| GLSLstd450PackSnorm4x8, |
| GLSLstd450PackUnorm4x8, |
| GLSLstd450PackSnorm2x16, |
| GLSLstd450PackUnorm2x16, |
| GLSLstd450PackHalf2x16, |
| GLSLstd450PackDouble2x32, |
| GLSLstd450UnpackSnorm2x16, |
| GLSLstd450UnpackUnorm2x16, |
| GLSLstd450UnpackHalf2x16, |
| GLSLstd450UnpackSnorm4x8, |
| GLSLstd450UnpackUnorm4x8, |
| GLSLstd450UnpackDouble2x32, |
| GLSLstd450Length, |
| GLSLstd450Distance, |
| GLSLstd450Cross, |
| GLSLstd450Normalize, |
| GLSLstd450FaceForward, |
| GLSLstd450Reflect, |
| GLSLstd450Refract, |
| GLSLstd450FindILsb, |
| GLSLstd450FindSMsb, |
| GLSLstd450FindUMsb, |
| GLSLstd450InterpolateAtCentroid, |
| GLSLstd450InterpolateAtSample, |
| GLSLstd450InterpolateAtOffset, |
| GLSLstd450NMin, |
| GLSLstd450NMax, |
| GLSLstd450NClamp}; |
| } else { |
| // Map the result id to the empty set. |
| combinator_ops_[extension->result_id()]; |
| } |
| } |
| |
| void IRContext::InitializeCombinators() { |
| get_feature_mgr()->GetCapabilities()->ForEach( |
| [this](SpvCapability cap) { AddCombinatorsForCapability(cap); }); |
| |
| for (auto& extension : module()->ext_inst_imports()) { |
| AddCombinatorsForExtension(&extension); |
| } |
| |
| valid_analyses_ |= kAnalysisCombinators; |
| } |
| |
| void IRContext::RemoveFromIdToName(const Instruction* inst) { |
| if (id_to_name_ && |
| (inst->opcode() == SpvOpName || inst->opcode() == SpvOpMemberName)) { |
| auto range = id_to_name_->equal_range(inst->GetSingleWordInOperand(0)); |
| for (auto it = range.first; it != range.second; ++it) { |
| if (it->second == inst) { |
| id_to_name_->erase(it); |
| break; |
| } |
| } |
| } |
| } |
| |
| LoopDescriptor* IRContext::GetLoopDescriptor(const Function* f) { |
| if (!AreAnalysesValid(kAnalysisLoopAnalysis)) { |
| ResetLoopAnalysis(); |
| } |
| |
| std::unordered_map<const Function*, LoopDescriptor>::iterator it = |
| loop_descriptors_.find(f); |
| if (it == loop_descriptors_.end()) { |
| return &loop_descriptors_ |
| .emplace(std::make_pair(f, LoopDescriptor(this, f))) |
| .first->second; |
| } |
| |
| return &it->second; |
| } |
| |
| uint32_t IRContext::FindBuiltinVar(uint32_t builtin) { |
| for (auto& a : module_->annotations()) { |
| if (a.opcode() != SpvOpDecorate) continue; |
| if (a.GetSingleWordInOperand(kSpvDecorateDecorationInIdx) != |
| SpvDecorationBuiltIn) |
| continue; |
| if (a.GetSingleWordInOperand(kSpvDecorateBuiltinInIdx) != builtin) continue; |
| uint32_t target_id = a.GetSingleWordInOperand(kSpvDecorateTargetIdInIdx); |
| Instruction* b_var = get_def_use_mgr()->GetDef(target_id); |
| if (b_var->opcode() != SpvOpVariable) continue; |
| return target_id; |
| } |
| return 0; |
| } |
| |
| void IRContext::AddVarToEntryPoints(uint32_t var_id) { |
| uint32_t ocnt = 0; |
| for (auto& e : module()->entry_points()) { |
| bool found = false; |
| e.ForEachInOperand([&ocnt, &found, &var_id](const uint32_t* idp) { |
| if (ocnt >= kEntryPointInterfaceInIdx) { |
| if (*idp == var_id) found = true; |
| } |
| ++ocnt; |
| }); |
| if (!found) { |
| e.AddOperand({SPV_OPERAND_TYPE_ID, {var_id}}); |
| get_def_use_mgr()->AnalyzeInstDefUse(&e); |
| } |
| } |
| } |
| |
| uint32_t IRContext::GetBuiltinVarId(uint32_t builtin) { |
| if (!AreAnalysesValid(kAnalysisBuiltinVarId)) ResetBuiltinAnalysis(); |
| // If cached, return it. |
| std::unordered_map<uint32_t, uint32_t>::iterator it = |
| builtin_var_id_map_.find(builtin); |
| if (it != builtin_var_id_map_.end()) return it->second; |
| // Look for one in shader |
| uint32_t var_id = FindBuiltinVar(builtin); |
| if (var_id == 0) { |
| // If not found, create it |
| // TODO(greg-lunarg): Add support for all builtins |
| analysis::TypeManager* type_mgr = get_type_mgr(); |
| analysis::Type* reg_type; |
| switch (builtin) { |
| case SpvBuiltInFragCoord: { |
| analysis::Float float_ty(32); |
| analysis::Type* reg_float_ty = type_mgr->GetRegisteredType(&float_ty); |
| analysis::Vector v4float_ty(reg_float_ty, 4); |
| reg_type = type_mgr->GetRegisteredType(&v4float_ty); |
| break; |
| } |
| case SpvBuiltInVertexIndex: |
| case SpvBuiltInInstanceIndex: |
| case SpvBuiltInPrimitiveId: |
| case SpvBuiltInInvocationId: |
| case SpvBuiltInGlobalInvocationId: { |
| analysis::Integer uint_ty(32, false); |
| reg_type = type_mgr->GetRegisteredType(&uint_ty); |
| break; |
| } |
| default: { |
| assert(false && "unhandled builtin"); |
| return 0; |
| } |
| } |
| uint32_t type_id = type_mgr->GetTypeInstruction(reg_type); |
| uint32_t varTyPtrId = |
| type_mgr->FindPointerToType(type_id, SpvStorageClassInput); |
| // TODO(1841): Handle id overflow. |
| var_id = TakeNextId(); |
| std::unique_ptr<Instruction> newVarOp( |
| new Instruction(this, SpvOpVariable, varTyPtrId, var_id, |
| {{spv_operand_type_t::SPV_OPERAND_TYPE_LITERAL_INTEGER, |
| {SpvStorageClassInput}}})); |
| get_def_use_mgr()->AnalyzeInstDefUse(&*newVarOp); |
| module()->AddGlobalValue(std::move(newVarOp)); |
| get_decoration_mgr()->AddDecorationVal(var_id, SpvDecorationBuiltIn, |
| builtin); |
| AddVarToEntryPoints(var_id); |
| } |
| builtin_var_id_map_[builtin] = var_id; |
| return var_id; |
| } |
| |
| void IRContext::AddCalls(const Function* func, std::queue<uint32_t>* todo) { |
| for (auto bi = func->begin(); bi != func->end(); ++bi) |
| for (auto ii = bi->begin(); ii != bi->end(); ++ii) |
| if (ii->opcode() == SpvOpFunctionCall) |
| todo->push(ii->GetSingleWordInOperand(0)); |
| } |
| |
| bool IRContext::ProcessEntryPointCallTree(ProcessFunction& pfn) { |
| // Collect all of the entry points as the roots. |
| std::queue<uint32_t> roots; |
| for (auto& e : module()->entry_points()) { |
| roots.push(e.GetSingleWordInOperand(kEntryPointFunctionIdInIdx)); |
| } |
| return ProcessCallTreeFromRoots(pfn, &roots); |
| } |
| |
| bool IRContext::ProcessReachableCallTree(ProcessFunction& pfn) { |
| std::queue<uint32_t> roots; |
| |
| // Add all entry points since they can be reached from outside the module. |
| for (auto& e : module()->entry_points()) |
| roots.push(e.GetSingleWordInOperand(kEntryPointFunctionIdInIdx)); |
| |
| // Add all exported functions since they can be reached from outside the |
| // module. |
| for (auto& a : annotations()) { |
| // TODO: Handle group decorations as well. Currently not generate by any |
| // front-end, but could be coming. |
| if (a.opcode() == SpvOp::SpvOpDecorate) { |
| if (a.GetSingleWordOperand(1) == |
| SpvDecoration::SpvDecorationLinkageAttributes) { |
| uint32_t lastOperand = a.NumOperands() - 1; |
| if (a.GetSingleWordOperand(lastOperand) == |
| SpvLinkageType::SpvLinkageTypeExport) { |
| uint32_t id = a.GetSingleWordOperand(0); |
| if (GetFunction(id)) { |
| roots.push(id); |
| } |
| } |
| } |
| } |
| } |
| |
| return ProcessCallTreeFromRoots(pfn, &roots); |
| } |
| |
| bool IRContext::ProcessCallTreeFromRoots(ProcessFunction& pfn, |
| std::queue<uint32_t>* roots) { |
| // Process call tree |
| bool modified = false; |
| std::unordered_set<uint32_t> done; |
| |
| while (!roots->empty()) { |
| const uint32_t fi = roots->front(); |
| roots->pop(); |
| if (done.insert(fi).second) { |
| Function* fn = GetFunction(fi); |
| modified = pfn(fn) || modified; |
| AddCalls(fn, roots); |
| } |
| } |
| return modified; |
| } |
| |
| // Gets the dominator analysis for function |f|. |
| DominatorAnalysis* IRContext::GetDominatorAnalysis(const Function* f) { |
| if (!AreAnalysesValid(kAnalysisDominatorAnalysis)) { |
| ResetDominatorAnalysis(); |
| } |
| |
| if (dominator_trees_.find(f) == dominator_trees_.end()) { |
| dominator_trees_[f].InitializeTree(*cfg(), f); |
| } |
| |
| return &dominator_trees_[f]; |
| } |
| |
| // Gets the postdominator analysis for function |f|. |
| PostDominatorAnalysis* IRContext::GetPostDominatorAnalysis(const Function* f) { |
| if (!AreAnalysesValid(kAnalysisDominatorAnalysis)) { |
| ResetDominatorAnalysis(); |
| } |
| |
| if (post_dominator_trees_.find(f) == post_dominator_trees_.end()) { |
| post_dominator_trees_[f].InitializeTree(*cfg(), f); |
| } |
| |
| return &post_dominator_trees_[f]; |
| } |
| |
| bool IRContext::CheckCFG() { |
| std::unordered_map<uint32_t, std::vector<uint32_t>> real_preds; |
| if (!AreAnalysesValid(kAnalysisCFG)) { |
| return true; |
| } |
| |
| for (Function& function : *module()) { |
| for (const auto& bb : function) { |
| bb.ForEachSuccessorLabel([&bb, &real_preds](const uint32_t lab_id) { |
| real_preds[lab_id].push_back(bb.id()); |
| }); |
| } |
| |
| for (auto& bb : function) { |
| std::vector<uint32_t> preds = cfg()->preds(bb.id()); |
| std::vector<uint32_t> real = real_preds[bb.id()]; |
| std::sort(preds.begin(), preds.end()); |
| std::sort(real.begin(), real.end()); |
| |
| bool same = true; |
| if (preds.size() != real.size()) { |
| same = false; |
| } |
| |
| for (size_t i = 0; i < real.size() && same; i++) { |
| if (preds[i] != real[i]) { |
| same = false; |
| } |
| } |
| |
| if (!same) { |
| std::cerr << "Predecessors for " << bb.id() << " are different:\n"; |
| |
| std::cerr << "Real:"; |
| for (uint32_t i : real) { |
| std::cerr << ' ' << i; |
| } |
| std::cerr << std::endl; |
| |
| std::cerr << "Recorded:"; |
| for (uint32_t i : preds) { |
| std::cerr << ' ' << i; |
| } |
| std::cerr << std::endl; |
| } |
| if (!same) return false; |
| } |
| } |
| |
| return true; |
| } |
| } // namespace opt |
| } // namespace spvtools |
