mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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218 lines
9.5 KiB
C++
218 lines
9.5 KiB
C++
// Copyright (c) 2019 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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#ifndef SOURCE_FUZZ_FUZZER_UTIL_H_
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#define SOURCE_FUZZ_FUZZER_UTIL_H_
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#include <vector>
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#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
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#include "source/opt/basic_block.h"
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#include "source/opt/instruction.h"
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#include "source/opt/ir_context.h"
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namespace spvtools {
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namespace fuzz {
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// Provides types and global utility methods for use by the fuzzer
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namespace fuzzerutil {
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// Function type that produces a SPIR-V module.
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using ModuleSupplier = std::function<std::unique_ptr<opt::IRContext>()>;
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// Returns true if and only if the module does not define the given id.
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bool IsFreshId(opt::IRContext* context, uint32_t id);
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// Updates the module's id bound if needed so that it is large enough to
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// account for the given id.
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void UpdateModuleIdBound(opt::IRContext* context, uint32_t id);
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// Return the block with id |maybe_block_id| if it exists, and nullptr
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// otherwise.
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opt::BasicBlock* MaybeFindBlock(opt::IRContext* context,
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uint32_t maybe_block_id);
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// When adding an edge from |bb_from| to |bb_to| (which are assumed to be blocks
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// in the same function), it is important to supply |bb_to| with ids that can be
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// used to augment OpPhi instructions in the case that there is not already such
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// an edge. This function returns true if and only if the ids provided in
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// |phi_ids| suffice for this purpose,
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bool PhiIdsOkForNewEdge(
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opt::IRContext* context, opt::BasicBlock* bb_from, opt::BasicBlock* bb_to,
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const google::protobuf::RepeatedField<google::protobuf::uint32>& phi_ids);
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// Returns the id of a boolean constant with value |value| if it exists in the
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// module, or 0 otherwise.
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uint32_t MaybeGetBoolConstantId(opt::IRContext* context, bool value);
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// Requires that a boolean constant with value |condition_value| is available,
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// that PhiIdsOkForNewEdge(context, bb_from, bb_to, phi_ids) holds, and that
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// bb_from ends with "OpBranch %some_block". Turns OpBranch into
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// "OpBranchConditional |condition_value| ...", such that control will branch
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// to %some_block, with |bb_to| being the unreachable alternative. Updates
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// OpPhi instructions in |bb_to| using |phi_ids| so that the new edge is valid.
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void AddUnreachableEdgeAndUpdateOpPhis(
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opt::IRContext* context, opt::BasicBlock* bb_from, opt::BasicBlock* bb_to,
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bool condition_value,
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const google::protobuf::RepeatedField<google::protobuf::uint32>& phi_ids);
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// Returns true if and only if |maybe_loop_header_id| is a loop header and
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// |block_id| is in the continue construct of the associated loop.
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bool BlockIsInLoopContinueConstruct(opt::IRContext* context, uint32_t block_id,
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uint32_t maybe_loop_header_id);
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// If |block| contains |inst|, an iterator for |inst| is returned.
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// Otherwise |block|->end() is returned.
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opt::BasicBlock::iterator GetIteratorForInstruction(
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opt::BasicBlock* block, const opt::Instruction* inst);
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// Returns true if and only if there is a path to |bb| from the entry block of
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// the function that contains |bb|.
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bool BlockIsReachableInItsFunction(opt::IRContext* context,
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opt::BasicBlock* bb);
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// Determines whether it is OK to insert an instruction with opcode |opcode|
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// before |instruction_in_block|.
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bool CanInsertOpcodeBeforeInstruction(
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SpvOp opcode, const opt::BasicBlock::iterator& instruction_in_block);
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// Determines whether it is OK to make a synonym of |inst|.
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bool CanMakeSynonymOf(opt::IRContext* ir_context, opt::Instruction* inst);
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// Determines whether the given type is a composite; that is: an array, matrix,
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// struct or vector.
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bool IsCompositeType(const opt::analysis::Type* type);
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// Returns a vector containing the same elements as |repeated_field|.
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std::vector<uint32_t> RepeatedFieldToVector(
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const google::protobuf::RepeatedField<uint32_t>& repeated_field);
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// Given a type id, |base_object_type_id|, returns 0 if the type is not a
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// composite type or if |index| is too large to be used as an index into the
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// composite. Otherwise returns the type id of the type associated with the
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// composite's index.
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//
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// Example: if |base_object_type_id| is 10, and we have:
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//
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// %10 = OpTypeStruct %3 %4 %5
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//
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// then 3 will be returned if |index| is 0, 5 if |index| is 2, and 0 if index
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// is 3 or larger.
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uint32_t WalkOneCompositeTypeIndex(opt::IRContext* context,
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uint32_t base_object_type_id,
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uint32_t index);
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// Given a type id, |base_object_type_id|, checks that the given sequence of
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// |indices| is suitable for indexing into this type. Returns the id of the
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// type of the final sub-object reached via the indices if they are valid, and
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// 0 otherwise.
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uint32_t WalkCompositeTypeIndices(
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opt::IRContext* context, uint32_t base_object_type_id,
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const google::protobuf::RepeatedField<google::protobuf::uint32>& indices);
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// Returns the number of members associated with |struct_type_instruction|,
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// which must be an OpStructType instruction.
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uint32_t GetNumberOfStructMembers(
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const opt::Instruction& struct_type_instruction);
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// Returns the constant size of the array associated with
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// |array_type_instruction|, which must be an OpArrayType instruction. Returns
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// 0 if there is not a static size.
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uint32_t GetArraySize(const opt::Instruction& array_type_instruction,
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opt::IRContext* context);
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// Returns true if and only if |context| is valid, according to the validator.
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bool IsValid(opt::IRContext* context);
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// Returns a clone of |context|, by writing |context| to a binary and then
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// parsing it again.
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std::unique_ptr<opt::IRContext> CloneIRContext(opt::IRContext* context);
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// Returns true if and only if |id| is the id of a type that is not a function
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// type.
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bool IsNonFunctionTypeId(opt::IRContext* ir_context, uint32_t id);
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// Returns true if and only if |block_id| is a merge block or continue target
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bool IsMergeOrContinue(opt::IRContext* ir_context, uint32_t block_id);
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// Returns the result id of an instruction of the form:
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// %id = OpTypeFunction |type_ids|
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// or 0 if no such instruction exists.
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uint32_t FindFunctionType(opt::IRContext* ir_context,
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const std::vector<uint32_t>& type_ids);
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// Returns a type instruction (OpTypeFunction) for |function|.
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// Returns |nullptr| if type is not found.
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opt::Instruction* GetFunctionType(opt::IRContext* context,
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const opt::Function* function);
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// Returns the function with result id |function_id|, or |nullptr| if no such
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// function exists.
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opt::Function* FindFunction(opt::IRContext* ir_context, uint32_t function_id);
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// Returns |true| if one of entry points has function id |function_id|.
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bool FunctionIsEntryPoint(opt::IRContext* context, uint32_t function_id);
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// Checks whether |id| is available (according to dominance rules) at the use
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// point defined by input operand |use_input_operand_index| of
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// |use_instruction|.
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bool IdIsAvailableAtUse(opt::IRContext* context,
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opt::Instruction* use_instruction,
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uint32_t use_input_operand_index, uint32_t id);
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// Checks whether |id| is available (according to dominance rules) at the
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// program point directly before |instruction|.
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bool IdIsAvailableBeforeInstruction(opt::IRContext* context,
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opt::Instruction* instruction, uint32_t id);
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// Returns true if and only if |instruction| is an OpFunctionParameter
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// associated with |function|.
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bool InstructionIsFunctionParameter(opt::Instruction* instruction,
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opt::Function* function);
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// Returns the type id of the instruction defined by |result_id|, or 0 if there
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// is no such result id.
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uint32_t GetTypeId(opt::IRContext* context, uint32_t result_id);
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// Given |pointer_type_inst|, which must be an OpTypePointer instruction,
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// returns the id of the associated pointee type.
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uint32_t GetPointeeTypeIdFromPointerType(opt::Instruction* pointer_type_inst);
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// Given |pointer_type_id|, which must be the id of a pointer type, returns the
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// id of the associated pointee type.
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uint32_t GetPointeeTypeIdFromPointerType(opt::IRContext* context,
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uint32_t pointer_type_id);
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// Given |pointer_type_inst|, which must be an OpTypePointer instruction,
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// returns the associated storage class.
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SpvStorageClass GetStorageClassFromPointerType(
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opt::Instruction* pointer_type_inst);
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// Given |pointer_type_id|, which must be the id of a pointer type, returns the
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// associated storage class.
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SpvStorageClass GetStorageClassFromPointerType(opt::IRContext* context,
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uint32_t pointer_type_id);
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// Returns the id of a pointer with pointee type |pointee_type_id| and storage
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// class |storage_class|, if it exists, and 0 otherwise.
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uint32_t MaybeGetPointerType(opt::IRContext* context, uint32_t pointee_type_id,
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SpvStorageClass storage_class);
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} // namespace fuzzerutil
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} // namespace fuzz
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} // namespace spvtools
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#endif // SOURCE_FUZZ_FUZZER_UTIL_H_
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