source/fuzz/transformation_add_synonym.cpp - external/github.com/KhronosGroup/SPIRV-Tools - Git at Google

 // Copyright (c) 2020 Vasyl Teliman
 //
 // 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/fuzz/transformation_add_synonym.h"

 #include <utility>

 #include "source/fuzz/fuzzer_util.h"
 #include "source/fuzz/instruction_descriptor.h"

 namespace spvtools {
 namespace fuzz {

 TransformationAddSynonym::TransformationAddSynonym(
     protobufs::TransformationAddSynonym message)
     : message_(std::move(message)) {}

 TransformationAddSynonym::TransformationAddSynonym(
     uint32_t result_id,
     protobufs::TransformationAddSynonym::SynonymType synonym_type,
     uint32_t synonym_fresh_id,
     const protobufs::InstructionDescriptor& insert_before) {
   message_.set_result_id(result_id);
   message_.set_synonym_type(synonym_type);
   message_.set_synonym_fresh_id(synonym_fresh_id);
   *message_.mutable_insert_before() = insert_before;
 }

 bool TransformationAddSynonym::IsApplicable(
     opt::IRContext* ir_context,
     const TransformationContext& transformation_context) const {
   assert(protobufs::TransformationAddSynonym::SynonymType_IsValid(
              message_.synonym_type()) &&
          "Synonym type is invalid");

   // |synonym_fresh_id| must be fresh.
   if (!fuzzerutil::IsFreshId(ir_context, message_.synonym_fresh_id())) {
     return false;
   }

   // Check that |message_.result_id| is valid.
   auto* synonym = ir_context->get_def_use_mgr()->GetDef(message_.result_id());
   if (!synonym) {
     return false;
   }

   // Check that we can apply |synonym_type| to |result_id|.
   if (!IsInstructionValid(ir_context, transformation_context, synonym,
                           message_.synonym_type())) {
     return false;
   }

   // Check that |insert_before| is valid.
   auto* insert_before_inst =
       FindInstruction(message_.insert_before(), ir_context);
   if (!insert_before_inst) {
     return false;
   }

   const auto* insert_before_inst_block =
       ir_context->get_instr_block(insert_before_inst);
   assert(insert_before_inst_block &&
          "|insert_before_inst| must be in some block");

   if (transformation_context.GetFactManager()->BlockIsDead(
           insert_before_inst_block->id())) {
     // We don't create synonyms in dead blocks.
     return false;
   }

   // Check that we can insert |message._synonymous_instruction| before
   // |message_.insert_before| instruction. We use OpIAdd to represent some
   // instruction that can produce a synonym.
   if (!fuzzerutil::CanInsertOpcodeBeforeInstruction(SpvOpIAdd,
                                                     insert_before_inst)) {
     return false;
   }

   // A constant instruction must be present in the module if required.
   if (IsAdditionalConstantRequired(message_.synonym_type()) &&
       MaybeGetConstantId(ir_context, transformation_context) == 0) {
     return false;
   }

   // Domination rules must be satisfied.
   return fuzzerutil::IdIsAvailableBeforeInstruction(
       ir_context, insert_before_inst, message_.result_id());
 }

 void TransformationAddSynonym::Apply(
     opt::IRContext* ir_context,
     TransformationContext* transformation_context) const {
   // Add a synonymous instruction.
   auto new_instruction =
       MakeSynonymousInstruction(ir_context, *transformation_context);
   auto new_instruction_ptr = new_instruction.get();
   auto insert_before = FindInstruction(message_.insert_before(), ir_context);
   insert_before->InsertBefore(std::move(new_instruction));

   fuzzerutil::UpdateModuleIdBound(ir_context, message_.synonym_fresh_id());

   // Inform the def-use manager about the new instruction and record its basic
   // block.
   ir_context->get_def_use_mgr()->AnalyzeInstDefUse(new_instruction_ptr);
   ir_context->set_instr_block(new_instruction_ptr,
                               ir_context->get_instr_block(insert_before));

   // Propagate PointeeValueIsIrrelevant fact.
   const auto* new_synonym_type = ir_context->get_type_mgr()->GetType(
       fuzzerutil::GetTypeId(ir_context, message_.synonym_fresh_id()));
   assert(new_synonym_type && "New synonym should have a valid type");

   if (transformation_context->GetFactManager()->PointeeValueIsIrrelevant(
           message_.result_id()) &&
       new_synonym_type->AsPointer()) {
     transformation_context->GetFactManager()->AddFactValueOfPointeeIsIrrelevant(
         message_.synonym_fresh_id());
   }

   // Mark two ids as synonymous.
   transformation_context->GetFactManager()->AddFactDataSynonym(
       MakeDataDescriptor(message_.result_id(), {}),
       MakeDataDescriptor(message_.synonym_fresh_id(), {}));
 }

 protobufs::Transformation TransformationAddSynonym::ToMessage() const {
   protobufs::Transformation result;
   *result.mutable_add_synonym() = message_;
   return result;
 }

 bool TransformationAddSynonym::IsInstructionValid(
     opt::IRContext* ir_context,
     const TransformationContext& transformation_context, opt::Instruction* inst,
     protobufs::TransformationAddSynonym::SynonymType synonym_type) {
   // Instruction must have a result id, type id. We skip OpUndef and
   // OpConstantNull.
   if (!inst || !inst->result_id() || !inst->type_id() ||
       inst->opcode() == SpvOpUndef || inst->opcode() == SpvOpConstantNull) {
     return false;
   }

   if (!fuzzerutil::CanMakeSynonymOf(ir_context, transformation_context, inst)) {
     return false;
   }

   switch (synonym_type) {
     case protobufs::TransformationAddSynonym::ADD_ZERO:
     case protobufs::TransformationAddSynonym::SUB_ZERO:
     case protobufs::TransformationAddSynonym::MUL_ONE: {
       // The instruction must be either scalar or vector of integers or floats.
       const auto* type = ir_context->get_type_mgr()->GetType(inst->type_id());
       assert(type && "Instruction's result id is invalid");

       if (const auto* vector = type->AsVector()) {
         return vector->element_type()->AsInteger() ||
                vector->element_type()->AsFloat();
       }

       return type->AsInteger() || type->AsFloat();
     }
     case protobufs::TransformationAddSynonym::BITWISE_OR:
     case protobufs::TransformationAddSynonym::BITWISE_XOR: {
       // The instruction must be either an integer or a vector of integers.
       const auto* type = ir_context->get_type_mgr()->GetType(inst->type_id());
       assert(type && "Instruction's result id is invalid");

       if (const auto* vector = type->AsVector()) {
         return vector->element_type()->AsInteger();
       }

       return type->AsInteger();
     }
     case protobufs::TransformationAddSynonym::COPY_OBJECT:
       // All checks for OpCopyObject are handled by
       // fuzzerutil::CanMakeSynonymOf.
       return true;
     case protobufs::TransformationAddSynonym::LOGICAL_AND:
     case protobufs::TransformationAddSynonym::LOGICAL_OR: {
       // The instruction must be either a scalar or a vector of booleans.
       const auto* type = ir_context->get_type_mgr()->GetType(inst->type_id());
       assert(type && "Instruction's result id is invalid");
       return (type->AsVector() && type->AsVector()->element_type()->AsBool()) ||
              type->AsBool();
     }
     default:
       assert(false && "Synonym type is not supported");
       return false;
   }
 }

 std::unique_ptr<opt::Instruction>
 TransformationAddSynonym::MakeSynonymousInstruction(
     opt::IRContext* ir_context,
     const TransformationContext& transformation_context) const {
   auto synonym_type_id =
       fuzzerutil::GetTypeId(ir_context, message_.result_id());
   assert(synonym_type_id && "Synonym has invalid type id");
   auto opcode = SpvOpNop;
   const auto* synonym_type =
       ir_context->get_type_mgr()->GetType(synonym_type_id);
   assert(synonym_type && "Synonym has invalid type");

   auto is_integral = (synonym_type->AsVector() &&
                       synonym_type->AsVector()->element_type()->AsInteger()) ||
                      synonym_type->AsInteger();

   switch (message_.synonym_type()) {
     case protobufs::TransformationAddSynonym::SUB_ZERO:
       opcode = is_integral ? SpvOpISub : SpvOpFSub;
       break;
     case protobufs::TransformationAddSynonym::MUL_ONE:
       opcode = is_integral ? SpvOpIMul : SpvOpFMul;
       break;
     case protobufs::TransformationAddSynonym::ADD_ZERO:
       opcode = is_integral ? SpvOpIAdd : SpvOpFAdd;
       break;
     case protobufs::TransformationAddSynonym::LOGICAL_OR:
       opcode = SpvOpLogicalOr;
       break;
     case protobufs::TransformationAddSynonym::LOGICAL_AND:
       opcode = SpvOpLogicalAnd;
       break;
     case protobufs::TransformationAddSynonym::BITWISE_OR:
       opcode = SpvOpBitwiseOr;
       break;
     case protobufs::TransformationAddSynonym::BITWISE_XOR:
       opcode = SpvOpBitwiseXor;
       break;

     case protobufs::TransformationAddSynonym::COPY_OBJECT:
       return MakeUnique<opt::Instruction>(
           ir_context, SpvOpCopyObject, synonym_type_id,
           message_.synonym_fresh_id(),
           opt::Instruction::OperandList{
               {SPV_OPERAND_TYPE_ID, {message_.result_id()}}});

     default:
       assert(false && "Unhandled synonym type");
       return nullptr;
   }

   return MakeUnique<opt::Instruction>(
       ir_context, opcode, synonym_type_id, message_.synonym_fresh_id(),
       opt::Instruction::OperandList{
           {SPV_OPERAND_TYPE_ID, {message_.result_id()}},
           {SPV_OPERAND_TYPE_ID,
            {MaybeGetConstantId(ir_context, transformation_context)}}});
 }

 uint32_t TransformationAddSynonym::MaybeGetConstantId(
     opt::IRContext* ir_context,
     const TransformationContext& transformation_context) const {
   assert(IsAdditionalConstantRequired(message_.synonym_type()) &&
          "Synonym type doesn't require an additional constant");

   auto synonym_type_id =
       fuzzerutil::GetTypeId(ir_context, message_.result_id());
   assert(synonym_type_id && "Synonym has invalid type id");

   switch (message_.synonym_type()) {
     case protobufs::TransformationAddSynonym::ADD_ZERO:
     case protobufs::TransformationAddSynonym::SUB_ZERO:
     case protobufs::TransformationAddSynonym::LOGICAL_OR:
     case protobufs::TransformationAddSynonym::BITWISE_OR:
     case protobufs::TransformationAddSynonym::BITWISE_XOR:
       return fuzzerutil::MaybeGetZeroConstant(
           ir_context, transformation_context, synonym_type_id, false);
     case protobufs::TransformationAddSynonym::MUL_ONE:
     case protobufs::TransformationAddSynonym::LOGICAL_AND: {
       auto synonym_type = ir_context->get_type_mgr()->GetType(synonym_type_id);
       assert(synonym_type && "Synonym has invalid type");

       if (const auto* vector = synonym_type->AsVector()) {
         auto element_type_id =
             ir_context->get_type_mgr()->GetId(vector->element_type());
         assert(element_type_id && "Vector's element type is invalid");

         auto one_word =
             vector->element_type()->AsFloat() ? fuzzerutil::FloatToWord(1) : 1u;
         if (auto scalar_one_id = fuzzerutil::MaybeGetScalarConstant(
                 ir_context, transformation_context, {one_word}, element_type_id,
                 false)) {
           return fuzzerutil::MaybeGetCompositeConstant(
               ir_context, transformation_context,
               std::vector<uint32_t>(vector->element_count(), scalar_one_id),
               synonym_type_id, false);
         }

         return 0;
       } else {
         return fuzzerutil::MaybeGetScalarConstant(
             ir_context, transformation_context,
             {synonym_type->AsFloat() ? fuzzerutil::FloatToWord(1) : 1u},
             synonym_type_id, false);
       }
     }
     default:
       // The assertion at the beginning of the function will fail in the debug
       // mode.
       return 0;
   }
 }

 bool TransformationAddSynonym::IsAdditionalConstantRequired(
     protobufs::TransformationAddSynonym::SynonymType synonym_type) {
   switch (synonym_type) {
     case protobufs::TransformationAddSynonym::ADD_ZERO:
     case protobufs::TransformationAddSynonym::SUB_ZERO:
     case protobufs::TransformationAddSynonym::LOGICAL_OR:
     case protobufs::TransformationAddSynonym::MUL_ONE:
     case protobufs::TransformationAddSynonym::LOGICAL_AND:
     case protobufs::TransformationAddSynonym::BITWISE_OR:
     case protobufs::TransformationAddSynonym::BITWISE_XOR:
       return true;
     default:
       return false;
   }
 }

 std::unordered_set<uint32_t> TransformationAddSynonym::GetFreshIds() const {
   return {message_.synonym_fresh_id()};
 }

 }  // namespace fuzz
 }  // namespace spvtools
	// Copyright (c) 2020 Vasyl Teliman
	//
	// 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/fuzz/transformation_add_synonym.h"

	#include <utility>

	#include "source/fuzz/fuzzer_util.h"
	#include "source/fuzz/instruction_descriptor.h"

	namespace spvtools {
	namespace fuzz {

	TransformationAddSynonym::TransformationAddSynonym(
	protobufs::TransformationAddSynonym message)
	: message_(std::move(message)) {}

	TransformationAddSynonym::TransformationAddSynonym(
	uint32_t result_id,
	protobufs::TransformationAddSynonym::SynonymType synonym_type,
	uint32_t synonym_fresh_id,
	const protobufs::InstructionDescriptor& insert_before) {
	message_.set_result_id(result_id);
	message_.set_synonym_type(synonym_type);
	message_.set_synonym_fresh_id(synonym_fresh_id);
	*message_.mutable_insert_before() = insert_before;
	}

	bool TransformationAddSynonym::IsApplicable(
	opt::IRContext* ir_context,
	const TransformationContext& transformation_context) const {
	assert(protobufs::TransformationAddSynonym::SynonymType_IsValid(
	message_.synonym_type()) &&
	"Synonym type is invalid");

	// \|synonym_fresh_id\| must be fresh.
	if (!fuzzerutil::IsFreshId(ir_context, message_.synonym_fresh_id())) {
	return false;
	}

	// Check that \|message_.result_id\| is valid.
	auto* synonym = ir_context->get_def_use_mgr()->GetDef(message_.result_id());
	if (!synonym) {
	return false;
	}

	// Check that we can apply \|synonym_type\| to \|result_id\|.
	if (!IsInstructionValid(ir_context, transformation_context, synonym,
	message_.synonym_type())) {
	return false;
	}

	// Check that \|insert_before\| is valid.
	auto* insert_before_inst =
	FindInstruction(message_.insert_before(), ir_context);
	if (!insert_before_inst) {
	return false;
	}

	const auto* insert_before_inst_block =
	ir_context->get_instr_block(insert_before_inst);
	assert(insert_before_inst_block &&
	"\|insert_before_inst\| must be in some block");

	if (transformation_context.GetFactManager()->BlockIsDead(
	insert_before_inst_block->id())) {
	// We don't create synonyms in dead blocks.
	return false;
	}

	// Check that we can insert \|message._synonymous_instruction\| before
	// \|message_.insert_before\| instruction. We use OpIAdd to represent some
	// instruction that can produce a synonym.
	if (!fuzzerutil::CanInsertOpcodeBeforeInstruction(SpvOpIAdd,
	insert_before_inst)) {
	return false;
	}

	// A constant instruction must be present in the module if required.
	if (IsAdditionalConstantRequired(message_.synonym_type()) &&
	MaybeGetConstantId(ir_context, transformation_context) == 0) {
	return false;
	}

	// Domination rules must be satisfied.
	return fuzzerutil::IdIsAvailableBeforeInstruction(
	ir_context, insert_before_inst, message_.result_id());
	}

	void TransformationAddSynonym::Apply(
	opt::IRContext* ir_context,
	TransformationContext* transformation_context) const {
	// Add a synonymous instruction.
	auto new_instruction =
	MakeSynonymousInstruction(ir_context, *transformation_context);
	auto new_instruction_ptr = new_instruction.get();
	auto insert_before = FindInstruction(message_.insert_before(), ir_context);
	insert_before->InsertBefore(std::move(new_instruction));

	fuzzerutil::UpdateModuleIdBound(ir_context, message_.synonym_fresh_id());

	// Inform the def-use manager about the new instruction and record its basic
	// block.
	ir_context->get_def_use_mgr()->AnalyzeInstDefUse(new_instruction_ptr);
	ir_context->set_instr_block(new_instruction_ptr,
	ir_context->get_instr_block(insert_before));

	// Propagate PointeeValueIsIrrelevant fact.
	const auto* new_synonym_type = ir_context->get_type_mgr()->GetType(
	fuzzerutil::GetTypeId(ir_context, message_.synonym_fresh_id()));
	assert(new_synonym_type && "New synonym should have a valid type");

	if (transformation_context->GetFactManager()->PointeeValueIsIrrelevant(
	message_.result_id()) &&
	new_synonym_type->AsPointer()) {
	transformation_context->GetFactManager()->AddFactValueOfPointeeIsIrrelevant(
	message_.synonym_fresh_id());
	}

	// Mark two ids as synonymous.
	transformation_context->GetFactManager()->AddFactDataSynonym(
	MakeDataDescriptor(message_.result_id(), {}),
	MakeDataDescriptor(message_.synonym_fresh_id(), {}));
	}

	protobufs::Transformation TransformationAddSynonym::ToMessage() const {
	protobufs::Transformation result;
	*result.mutable_add_synonym() = message_;
	return result;
	}

	bool TransformationAddSynonym::IsInstructionValid(
	opt::IRContext* ir_context,
	const TransformationContext& transformation_context, opt::Instruction* inst,
	protobufs::TransformationAddSynonym::SynonymType synonym_type) {
	// Instruction must have a result id, type id. We skip OpUndef and
	// OpConstantNull.
	if (!inst \|\| !inst->result_id() \|\| !inst->type_id() \|\|
	inst->opcode() == SpvOpUndef \|\| inst->opcode() == SpvOpConstantNull) {
	return false;
	}

	if (!fuzzerutil::CanMakeSynonymOf(ir_context, transformation_context, inst)) {
	return false;
	}

	switch (synonym_type) {
	case protobufs::TransformationAddSynonym::ADD_ZERO:
	case protobufs::TransformationAddSynonym::SUB_ZERO:
	case protobufs::TransformationAddSynonym::MUL_ONE: {
	// The instruction must be either scalar or vector of integers or floats.
	const auto* type = ir_context->get_type_mgr()->GetType(inst->type_id());
	assert(type && "Instruction's result id is invalid");

	if (const auto* vector = type->AsVector()) {
	return vector->element_type()->AsInteger() \|\|
	vector->element_type()->AsFloat();
	}

	return type->AsInteger() \|\| type->AsFloat();
	}
	case protobufs::TransformationAddSynonym::BITWISE_OR:
	case protobufs::TransformationAddSynonym::BITWISE_XOR: {
	// The instruction must be either an integer or a vector of integers.
	const auto* type = ir_context->get_type_mgr()->GetType(inst->type_id());
	assert(type && "Instruction's result id is invalid");

	if (const auto* vector = type->AsVector()) {
	return vector->element_type()->AsInteger();
	}

	return type->AsInteger();
	}
	case protobufs::TransformationAddSynonym::COPY_OBJECT:
	// All checks for OpCopyObject are handled by
	// fuzzerutil::CanMakeSynonymOf.
	return true;
	case protobufs::TransformationAddSynonym::LOGICAL_AND:
	case protobufs::TransformationAddSynonym::LOGICAL_OR: {
	// The instruction must be either a scalar or a vector of booleans.
	const auto* type = ir_context->get_type_mgr()->GetType(inst->type_id());
	assert(type && "Instruction's result id is invalid");
	return (type->AsVector() && type->AsVector()->element_type()->AsBool()) \|\|
	type->AsBool();
	}
	default:
	assert(false && "Synonym type is not supported");
	return false;
	}
	}

	std::unique_ptr<opt::Instruction>
	TransformationAddSynonym::MakeSynonymousInstruction(
	opt::IRContext* ir_context,
	const TransformationContext& transformation_context) const {
	auto synonym_type_id =
	fuzzerutil::GetTypeId(ir_context, message_.result_id());
	assert(synonym_type_id && "Synonym has invalid type id");
	auto opcode = SpvOpNop;
	const auto* synonym_type =
	ir_context->get_type_mgr()->GetType(synonym_type_id);
	assert(synonym_type && "Synonym has invalid type");

	auto is_integral = (synonym_type->AsVector() &&
	synonym_type->AsVector()->element_type()->AsInteger()) \|\|
	synonym_type->AsInteger();

	switch (message_.synonym_type()) {
	case protobufs::TransformationAddSynonym::SUB_ZERO:
	opcode = is_integral ? SpvOpISub : SpvOpFSub;
	break;
	case protobufs::TransformationAddSynonym::MUL_ONE:
	opcode = is_integral ? SpvOpIMul : SpvOpFMul;
	break;
	case protobufs::TransformationAddSynonym::ADD_ZERO:
	opcode = is_integral ? SpvOpIAdd : SpvOpFAdd;
	break;
	case protobufs::TransformationAddSynonym::LOGICAL_OR:
	opcode = SpvOpLogicalOr;
	break;
	case protobufs::TransformationAddSynonym::LOGICAL_AND:
	opcode = SpvOpLogicalAnd;
	break;
	case protobufs::TransformationAddSynonym::BITWISE_OR:
	opcode = SpvOpBitwiseOr;
	break;
	case protobufs::TransformationAddSynonym::BITWISE_XOR:
	opcode = SpvOpBitwiseXor;
	break;

	case protobufs::TransformationAddSynonym::COPY_OBJECT:
	return MakeUnique<opt::Instruction>(
	ir_context, SpvOpCopyObject, synonym_type_id,
	message_.synonym_fresh_id(),
	opt::Instruction::OperandList{
	{SPV_OPERAND_TYPE_ID, {message_.result_id()}}});

	default:
	assert(false && "Unhandled synonym type");
	return nullptr;
	}

	return MakeUnique<opt::Instruction>(
	ir_context, opcode, synonym_type_id, message_.synonym_fresh_id(),
	opt::Instruction::OperandList{
	{SPV_OPERAND_TYPE_ID, {message_.result_id()}},
	{SPV_OPERAND_TYPE_ID,
	{MaybeGetConstantId(ir_context, transformation_context)}}});
	}

	uint32_t TransformationAddSynonym::MaybeGetConstantId(
	opt::IRContext* ir_context,
	const TransformationContext& transformation_context) const {
	assert(IsAdditionalConstantRequired(message_.synonym_type()) &&
	"Synonym type doesn't require an additional constant");

	auto synonym_type_id =
	fuzzerutil::GetTypeId(ir_context, message_.result_id());
	assert(synonym_type_id && "Synonym has invalid type id");

	switch (message_.synonym_type()) {
	case protobufs::TransformationAddSynonym::ADD_ZERO:
	case protobufs::TransformationAddSynonym::SUB_ZERO:
	case protobufs::TransformationAddSynonym::LOGICAL_OR:
	case protobufs::TransformationAddSynonym::BITWISE_OR:
	case protobufs::TransformationAddSynonym::BITWISE_XOR:
	return fuzzerutil::MaybeGetZeroConstant(
	ir_context, transformation_context, synonym_type_id, false);
	case protobufs::TransformationAddSynonym::MUL_ONE:
	case protobufs::TransformationAddSynonym::LOGICAL_AND: {
	auto synonym_type = ir_context->get_type_mgr()->GetType(synonym_type_id);
	assert(synonym_type && "Synonym has invalid type");

	if (const auto* vector = synonym_type->AsVector()) {
	auto element_type_id =
	ir_context->get_type_mgr()->GetId(vector->element_type());
	assert(element_type_id && "Vector's element type is invalid");

	auto one_word =
	vector->element_type()->AsFloat() ? fuzzerutil::FloatToWord(1) : 1u;
	if (auto scalar_one_id = fuzzerutil::MaybeGetScalarConstant(
	ir_context, transformation_context, {one_word}, element_type_id,
	false)) {
	return fuzzerutil::MaybeGetCompositeConstant(
	ir_context, transformation_context,
	std::vector<uint32_t>(vector->element_count(), scalar_one_id),
	synonym_type_id, false);
	}

	return 0;
	} else {
	return fuzzerutil::MaybeGetScalarConstant(
	ir_context, transformation_context,
	{synonym_type->AsFloat() ? fuzzerutil::FloatToWord(1) : 1u},
	synonym_type_id, false);
	}
	}
	default:
	// The assertion at the beginning of the function will fail in the debug
	// mode.
	return 0;
	}
	}

	bool TransformationAddSynonym::IsAdditionalConstantRequired(
	protobufs::TransformationAddSynonym::SynonymType synonym_type) {
	switch (synonym_type) {
	case protobufs::TransformationAddSynonym::ADD_ZERO:
	case protobufs::TransformationAddSynonym::SUB_ZERO:
	case protobufs::TransformationAddSynonym::LOGICAL_OR:
	case protobufs::TransformationAddSynonym::MUL_ONE:
	case protobufs::TransformationAddSynonym::LOGICAL_AND:
	case protobufs::TransformationAddSynonym::BITWISE_OR:
	case protobufs::TransformationAddSynonym::BITWISE_XOR:
	return true;
	default:
	return false;
	}
	}

	std::unordered_set<uint32_t> TransformationAddSynonym::GetFreshIds() const {
	return {message_.synonym_fresh_id()};
	}

	} // namespace fuzz
	} // namespace spvtools