mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-12-28 02:31:04 +00:00
288 lines
9.8 KiB
C++
288 lines
9.8 KiB
C++
// Copyright (c) 2020 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/fuzz/transformation_equation_instruction.h"
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#include "source/fuzz/fuzzer_util.h"
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#include "source/fuzz/instruction_descriptor.h"
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namespace spvtools {
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namespace fuzz {
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TransformationEquationInstruction::TransformationEquationInstruction(
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const spvtools::fuzz::protobufs::TransformationEquationInstruction& message)
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: message_(message) {}
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TransformationEquationInstruction::TransformationEquationInstruction(
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uint32_t fresh_id, SpvOp opcode, const std::vector<uint32_t>& in_operand_id,
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const protobufs::InstructionDescriptor& instruction_to_insert_before) {
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message_.set_fresh_id(fresh_id);
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message_.set_opcode(opcode);
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for (auto id : in_operand_id) {
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message_.add_in_operand_id(id);
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}
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*message_.mutable_instruction_to_insert_before() =
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instruction_to_insert_before;
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}
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bool TransformationEquationInstruction::IsApplicable(
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opt::IRContext* ir_context,
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const TransformationContext& transformation_context) const {
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// The result id must be fresh.
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if (!fuzzerutil::IsFreshId(ir_context, message_.fresh_id())) {
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return false;
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}
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// The instruction to insert before must exist.
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auto insert_before =
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FindInstruction(message_.instruction_to_insert_before(), ir_context);
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if (!insert_before) {
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return false;
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}
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// The input ids must all exist, not be OpUndef, and be available before this
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// instruction.
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for (auto id : message_.in_operand_id()) {
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auto inst = ir_context->get_def_use_mgr()->GetDef(id);
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if (!inst) {
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return false;
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}
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if (inst->opcode() == SpvOpUndef) {
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return false;
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}
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if (transformation_context.GetFactManager()->IdIsIrrelevant(id)) {
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return false;
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}
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if (!fuzzerutil::IdIsAvailableBeforeInstruction(ir_context, insert_before,
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id)) {
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return false;
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}
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}
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return MaybeGetResultTypeId(ir_context) != 0;
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}
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void TransformationEquationInstruction::Apply(
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opt::IRContext* ir_context,
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TransformationContext* transformation_context) const {
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fuzzerutil::UpdateModuleIdBound(ir_context, message_.fresh_id());
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opt::Instruction::OperandList in_operands;
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std::vector<uint32_t> rhs_id;
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for (auto id : message_.in_operand_id()) {
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in_operands.push_back({SPV_OPERAND_TYPE_ID, {id}});
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rhs_id.push_back(id);
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}
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FindInstruction(message_.instruction_to_insert_before(), ir_context)
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->InsertBefore(MakeUnique<opt::Instruction>(
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ir_context, static_cast<SpvOp>(message_.opcode()),
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MaybeGetResultTypeId(ir_context), message_.fresh_id(),
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std::move(in_operands)));
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ir_context->InvalidateAnalysesExceptFor(opt::IRContext::kAnalysisNone);
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transformation_context->GetFactManager()->AddFactIdEquation(
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message_.fresh_id(), static_cast<SpvOp>(message_.opcode()), rhs_id,
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ir_context);
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}
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protobufs::Transformation TransformationEquationInstruction::ToMessage() const {
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protobufs::Transformation result;
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*result.mutable_equation_instruction() = message_;
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return result;
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}
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uint32_t TransformationEquationInstruction::MaybeGetResultTypeId(
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opt::IRContext* ir_context) const {
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auto opcode = static_cast<SpvOp>(message_.opcode());
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switch (opcode) {
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case SpvOpConvertUToF:
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case SpvOpConvertSToF: {
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if (message_.in_operand_id_size() != 1) {
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return 0;
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}
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const auto* type = ir_context->get_type_mgr()->GetType(
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fuzzerutil::GetTypeId(ir_context, message_.in_operand_id(0)));
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if (!type) {
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return 0;
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}
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if (const auto* vector = type->AsVector()) {
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if (!vector->element_type()->AsInteger()) {
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return 0;
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}
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if (auto element_type_id = fuzzerutil::MaybeGetFloatType(
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ir_context, vector->element_type()->AsInteger()->width())) {
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return fuzzerutil::MaybeGetVectorType(ir_context, element_type_id,
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vector->element_count());
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}
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return 0;
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} else {
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if (!type->AsInteger()) {
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return 0;
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}
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return fuzzerutil::MaybeGetFloatType(ir_context,
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type->AsInteger()->width());
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}
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}
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case SpvOpBitcast: {
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if (message_.in_operand_id_size() != 1) {
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return 0;
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}
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const auto* operand_inst =
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ir_context->get_def_use_mgr()->GetDef(message_.in_operand_id(0));
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if (!operand_inst) {
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return 0;
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}
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const auto* operand_type =
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ir_context->get_type_mgr()->GetType(operand_inst->type_id());
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if (!operand_type) {
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return 0;
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}
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// TODO(https://github.com/KhronosGroup/SPIRV-Tools/issues/3539):
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// The only constraint on the types of OpBitcast's parameters is that
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// they must have the same number of bits. Consider improving the code
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// below to support this in full.
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if (const auto* vector = operand_type->AsVector()) {
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uint32_t component_type_id;
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if (const auto* int_type = vector->element_type()->AsInteger()) {
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component_type_id =
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fuzzerutil::MaybeGetFloatType(ir_context, int_type->width());
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} else if (const auto* float_type = vector->element_type()->AsFloat()) {
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component_type_id = fuzzerutil::MaybeGetIntegerType(
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ir_context, float_type->width(), true);
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if (component_type_id == 0 ||
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fuzzerutil::MaybeGetVectorType(ir_context, component_type_id,
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vector->element_count()) == 0) {
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component_type_id = fuzzerutil::MaybeGetIntegerType(
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ir_context, float_type->width(), false);
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}
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} else {
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assert(false && "Only vectors of numerical components are supported");
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return 0;
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}
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if (component_type_id == 0) {
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return 0;
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}
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return fuzzerutil::MaybeGetVectorType(ir_context, component_type_id,
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vector->element_count());
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} else if (const auto* int_type = operand_type->AsInteger()) {
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return fuzzerutil::MaybeGetFloatType(ir_context, int_type->width());
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} else if (const auto* float_type = operand_type->AsFloat()) {
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if (auto existing_id = fuzzerutil::MaybeGetIntegerType(
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ir_context, float_type->width(), true)) {
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return existing_id;
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}
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return fuzzerutil::MaybeGetIntegerType(ir_context, float_type->width(),
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false);
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} else {
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assert(false &&
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"Operand is not a scalar or a vector of numerical type");
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return 0;
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}
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}
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case SpvOpIAdd:
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case SpvOpISub: {
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if (message_.in_operand_id_size() != 2) {
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return 0;
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}
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uint32_t first_operand_width = 0;
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uint32_t first_operand_type_id = 0;
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for (uint32_t index = 0; index < 2; index++) {
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auto operand_inst = ir_context->get_def_use_mgr()->GetDef(
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message_.in_operand_id(index));
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if (!operand_inst || !operand_inst->type_id()) {
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return 0;
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}
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auto operand_type =
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ir_context->get_type_mgr()->GetType(operand_inst->type_id());
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if (!(operand_type->AsInteger() ||
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(operand_type->AsVector() &&
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operand_type->AsVector()->element_type()->AsInteger()))) {
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return 0;
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}
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uint32_t operand_width =
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operand_type->AsInteger()
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? 1
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: operand_type->AsVector()->element_count();
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if (index == 0) {
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first_operand_width = operand_width;
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first_operand_type_id = operand_inst->type_id();
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} else {
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assert(first_operand_width != 0 &&
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"The first operand should have been processed.");
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if (operand_width != first_operand_width) {
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return 0;
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}
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}
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}
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assert(first_operand_type_id != 0 &&
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"A type must have been found for the first operand.");
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return first_operand_type_id;
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}
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case SpvOpLogicalNot: {
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if (message_.in_operand_id().size() != 1) {
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return 0;
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}
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auto operand_inst =
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ir_context->get_def_use_mgr()->GetDef(message_.in_operand_id(0));
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if (!operand_inst || !operand_inst->type_id()) {
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return 0;
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}
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auto operand_type =
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ir_context->get_type_mgr()->GetType(operand_inst->type_id());
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if (!(operand_type->AsBool() ||
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(operand_type->AsVector() &&
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operand_type->AsVector()->element_type()->AsBool()))) {
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return 0;
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}
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return operand_inst->type_id();
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}
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case SpvOpSNegate: {
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if (message_.in_operand_id().size() != 1) {
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return 0;
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}
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auto operand_inst =
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ir_context->get_def_use_mgr()->GetDef(message_.in_operand_id(0));
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if (!operand_inst || !operand_inst->type_id()) {
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return 0;
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}
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auto operand_type =
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ir_context->get_type_mgr()->GetType(operand_inst->type_id());
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if (!(operand_type->AsInteger() ||
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(operand_type->AsVector() &&
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operand_type->AsVector()->element_type()->AsInteger()))) {
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return 0;
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}
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return operand_inst->type_id();
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}
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default:
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assert(false && "Inappropriate opcode for equation instruction.");
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return 0;
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}
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}
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} // namespace fuzz
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} // namespace spvtools
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