validate_interfaces.cpp | Explore in Territory

// Copyright (c) 2018 Google LLC.
//
// 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 <algorithm>
#include <vector>

#include "source/spirv_constant.h"
#include "source/spirv_target_env.h"
#include "source/val/function.h"
#include "source/val/instruction.h"
#include "source/val/validate.h"
#include "source/val/validation_state.h"

namespace spvtools {
namespace val {
namespace {

// Limit the number of checked locations to 4096. Multiplied by 4 to represent
// all the components. This limit is set to be well beyond practical use cases.
const uint32_t kMaxLocations = …;

// Returns true if \c inst is an input or output variable.
bool is_interface_variable(const Instruction* inst, bool is_spv_1_4) { … }

// Checks that \c var is listed as an interface in all the entry points that use
// it.
spv_result_t check_interface_variable(ValidationState_t& _,
                                      const Instruction* var) { … }

// This function assumes a base location has been determined already. As such
// any further location decorations are invalid.
// TODO: if this code turns out to be slow, there is an opportunity to cache
// the result for a given type id.
spv_result_t NumConsumedLocations(ValidationState_t& _, const Instruction* type,
                                  uint32_t* num_locations) { … }

// Returns the number of components consumed by types that support a component
// decoration.
uint32_t NumConsumedComponents(ValidationState_t& _, const Instruction* type) { … }

// Populates |locations| (and/or |output_index1_locations|) with the use
// location and component coordinates for |variable|. Indices are calculated as
// 4 * location + component.
spv_result_t GetLocationsForVariable(
    ValidationState_t& _, const Instruction* entry_point,
    const Instruction* variable, std::unordered_set<uint32_t>* locations,
    std::unordered_set<uint32_t>* output_index1_locations) { … }

spv_result_t ValidateLocations(ValidationState_t& _,
                               const Instruction* entry_point) { … }

spv_result_t ValidateStorageClass(ValidationState_t& _,
                                  const Instruction* entry_point) { … }

}  // namespace

spv_result_t ValidateInterfaces(ValidationState_t& _) { … }

}  // namespace val
}  // namespace spvtools
chromium/third_party/spirv-tools/src/source/val/validate_interfaces.cpp
