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// Copyright (c) 2020 André Perez Maselco
//
// 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_image_sample_unused_components.h"
#include "source/fuzz/fuzzer_util.h"
#include "source/fuzz/instruction_descriptor.h"
namespace spvtools {
namespace fuzz {
TransformationAddImageSampleUnusedComponents::
TransformationAddImageSampleUnusedComponents(
protobufs::TransformationAddImageSampleUnusedComponents message)
: message_(std::move(message)) {}
TransformationAddImageSampleUnusedComponents::
TransformationAddImageSampleUnusedComponents(
uint32_t coordinate_with_unused_components_id,
const protobufs::InstructionDescriptor& instruction_descriptor) {
message_.set_coordinate_with_unused_components_id(
coordinate_with_unused_components_id);
*message_.mutable_instruction_descriptor() = instruction_descriptor;
}
bool TransformationAddImageSampleUnusedComponents::IsApplicable(
opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
auto image_sample_instruction =
FindInstruction(message_.instruction_descriptor(), ir_context);
// The image sample instruction must be defined.
if (image_sample_instruction == nullptr) {
return false;
}
// The instruction must be an image sample instruction.
if (!spvOpcodeIsImageSample(image_sample_instruction->opcode())) {
return false;
}
uint32_t coordinate_id = image_sample_instruction->GetSingleWordInOperand(1);
auto coordinate_instruction =
ir_context->get_def_use_mgr()->GetDef(coordinate_id);
auto coordinate_type =
ir_context->get_type_mgr()->GetType(coordinate_instruction->type_id());
// It must be possible to add unused components.
if (coordinate_type->AsVector() &&
coordinate_type->AsVector()->element_count() == 4) {
return false;
}
auto coordinate_with_unused_components_instruction =
ir_context->get_def_use_mgr()->GetDef(
message_.coordinate_with_unused_components_id());
// The coordinate with unused components instruction must be defined.
if (coordinate_with_unused_components_instruction == nullptr) {
return false;
}
// It must be an OpCompositeConstruct instruction such that it can be checked
// that the original components are present.
if (coordinate_with_unused_components_instruction->opcode() !=
spv::Op::OpCompositeConstruct) {
return false;
}
// The first constituent must be the original coordinate.
if (coordinate_with_unused_components_instruction->GetSingleWordInOperand(
0) != coordinate_id) {
return false;
}
auto coordinate_with_unused_components_type =
ir_context->get_type_mgr()->GetType(
coordinate_with_unused_components_instruction->type_id());
// |coordinate_with_unused_components_type| must be a vector.
if (!coordinate_with_unused_components_type->AsVector()) {
return false;
}
return true;
}
void TransformationAddImageSampleUnusedComponents::Apply(
opt::IRContext* ir_context, TransformationContext* /*unused*/) const {
// Sets the coordinate operand.
auto image_sample_instruction =
FindInstruction(message_.instruction_descriptor(), ir_context);
image_sample_instruction->SetInOperand(
1, {message_.coordinate_with_unused_components_id()});
ir_context->InvalidateAnalysesExceptFor(opt::IRContext::kAnalysisNone);
}
protobufs::Transformation
TransformationAddImageSampleUnusedComponents::ToMessage() const {
protobufs::Transformation result;
*result.mutable_add_image_sample_unused_components() = message_;
return result;
}
std::unordered_set<uint32_t>
TransformationAddImageSampleUnusedComponents::GetFreshIds() const {
return std::unordered_set<uint32_t>();
}
} // namespace fuzz
} // namespace spvtools
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