mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-25 04:50:04 +00:00
d35a78db57
Fixes #4960 * Switches to using enum classes with an underlying type to avoid undefined behaviour
118 lines
4.8 KiB
C++
118 lines
4.8 KiB
C++
// Copyright (c) 2022 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.
|
|
|
|
#ifndef SOURCE_OPT_SPREAD_VOLATILE_SEMANTICS_H_
|
|
#define SOURCE_OPT_SPREAD_VOLATILE_SEMANTICS_H_
|
|
|
|
#include "source/opt/pass.h"
|
|
|
|
namespace spvtools {
|
|
namespace opt {
|
|
|
|
// See optimizer.hpp for documentation.
|
|
class SpreadVolatileSemantics : public Pass {
|
|
public:
|
|
SpreadVolatileSemantics() {}
|
|
|
|
const char* name() const override { return "spread-volatile-semantics"; }
|
|
|
|
Status Process() override;
|
|
|
|
IRContext::Analysis GetPreservedAnalyses() override {
|
|
return IRContext::kAnalysisDefUse | IRContext::kAnalysisDecorations |
|
|
IRContext::kAnalysisInstrToBlockMapping;
|
|
}
|
|
|
|
private:
|
|
// Returns true if it does not have an execution model. Linkage shaders do not
|
|
// have an execution model.
|
|
bool HasNoExecutionModel() {
|
|
return get_module()->entry_points().empty() &&
|
|
context()->get_feature_mgr()->HasCapability(
|
|
spv::Capability::Linkage);
|
|
}
|
|
|
|
// Iterates interface variables and spreads the Volatile semantics if it has
|
|
// load instructions for the Volatile semantics.
|
|
Pass::Status SpreadVolatileSemanticsToVariables(
|
|
const bool is_vk_memory_model_enabled);
|
|
|
|
// Returns whether |var_id| is the result id of a target builtin variable for
|
|
// the volatile semantics for |execution_model| based on the Vulkan spec
|
|
// VUID-StandaloneSpirv-VulkanMemoryModel-04678 or
|
|
// VUID-StandaloneSpirv-VulkanMemoryModel-04679.
|
|
bool IsTargetForVolatileSemantics(uint32_t var_id,
|
|
spv::ExecutionModel execution_model);
|
|
|
|
// Collects interface variables that need the volatile semantics.
|
|
// |is_vk_memory_model_enabled| is true if VulkanMemoryModel capability is
|
|
// enabled.
|
|
void CollectTargetsForVolatileSemantics(
|
|
const bool is_vk_memory_model_enabled);
|
|
|
|
// Reports an error if an interface variable is used by two entry points and
|
|
// it needs the Volatile decoration for one but not for another. Returns true
|
|
// if the error must be reported.
|
|
bool HasInterfaceInConflictOfVolatileSemantics();
|
|
|
|
// Returns whether the variable whose result is |var_id| is used by a
|
|
// non-volatile load or a pointer to it is used by a non-volatile load in
|
|
// |entry_point| or not.
|
|
bool IsTargetUsedByNonVolatileLoadInEntryPoint(uint32_t var_id,
|
|
Instruction* entry_point);
|
|
|
|
// Visits load instructions of pointers to variable whose result id is
|
|
// |var_id| if the load instructions are in reachable functions from entry
|
|
// points. |handle_load| is a function to do some actions for the load
|
|
// instructions. Finishes the traversal and returns false if |handle_load|
|
|
// returns false for a load instruction. Otherwise, returns true after running
|
|
// |handle_load| for all the load instructions.
|
|
bool VisitLoadsOfPointersToVariableInEntries(
|
|
uint32_t var_id, const std::function<bool(Instruction*)>& handle_load,
|
|
const std::unordered_set<uint32_t>& function_ids);
|
|
|
|
// Sets Memory Operands of OpLoad instructions that load |var| or pointers
|
|
// of |var| as Volatile if the function id of the OpLoad instruction is
|
|
// included in |entry_function_ids|.
|
|
void SetVolatileForLoadsInEntries(
|
|
Instruction* var, const std::unordered_set<uint32_t>& entry_function_ids);
|
|
|
|
// Adds OpDecorate Volatile for |var| if it does not exist.
|
|
void DecorateVarWithVolatile(Instruction* var);
|
|
|
|
// Returns a set of entry function ids to spread the volatile semantics for
|
|
// the variable with the result id |var_id|.
|
|
std::unordered_set<uint32_t> EntryFunctionsToSpreadVolatileSemanticsForVar(
|
|
uint32_t var_id) {
|
|
auto itr = var_ids_to_entry_fn_for_volatile_semantics_.find(var_id);
|
|
if (itr == var_ids_to_entry_fn_for_volatile_semantics_.end()) return {};
|
|
return itr->second;
|
|
}
|
|
|
|
// Specifies that we have to spread the volatile semantics for the
|
|
// variable with the result id |var_id| for the entry point |entry_point|.
|
|
void MarkVolatileSemanticsForVariable(uint32_t var_id,
|
|
Instruction* entry_point);
|
|
|
|
// Result ids of variables to entry function ids for the volatile semantics
|
|
// spread.
|
|
std::unordered_map<uint32_t, std::unordered_set<uint32_t>>
|
|
var_ids_to_entry_fn_for_volatile_semantics_;
|
|
};
|
|
|
|
} // namespace opt
|
|
} // namespace spvtools
|
|
|
|
#endif // SOURCE_OPT_SPREAD_VOLATILE_SEMANTICS_H_
|