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424f744db1
Target should not be ignored when comparing decorations in RemoveDuplicates Opt: Remove unused code in RemoveDuplicateDecorations
116 lines
4.8 KiB
C++
116 lines
4.8 KiB
C++
// Copyright (c) 2017 Pierre Moreau
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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 LIBSPIRV_OPT_DECORATION_MANAGER_H_
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#define LIBSPIRV_OPT_DECORATION_MANAGER_H_
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#include <functional>
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#include <unordered_map>
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#include <vector>
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#include "instruction.h"
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#include "module.h"
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namespace spvtools {
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namespace opt {
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namespace analysis {
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// A class for analyzing and managing decorations in an ir::Module.
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class DecorationManager {
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public:
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// Constructs a decoration manager from the given |module|
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explicit DecorationManager(ir::Module* module) : module_(module) {
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AnalyzeDecorations();
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}
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DecorationManager() = delete;
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// Removes all decorations from |id|, which should not be a group ID.
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void RemoveDecorationsFrom(uint32_t id);
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// Removes all decorations from the result id of |inst|.
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void RemoveDecoration(ir::Instruction* inst);
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// Returns a vector of all decorations affecting |id|. If a group is applied
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// to |id|, the decorations of that group are returned rather than the group
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// decoration instruction. If |include_linkage| is not set, linkage
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// decorations won't be returned.
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std::vector<ir::Instruction*> GetDecorationsFor(uint32_t id,
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bool include_linkage);
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std::vector<const ir::Instruction*> GetDecorationsFor(
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uint32_t id, bool include_linkage) const;
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// Returns whether two IDs have the same decorations. Two SpvOpGroupDecorate
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// instructions that apply the same decorations but to different IDs, still
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// count as being the same.
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bool HaveTheSameDecorations(uint32_t id1, uint32_t id2) const;
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// Returns whether the two decorations instructions are the same and are
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// applying the same decorations; unless |ignore_target| is false, the targets
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// to which they are applied to does not matter, except for the member part.
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//
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// This is only valid for OpDecorate, OpMemberDecorate and OpDecorateId; it
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// will return false for other opcodes.
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bool AreDecorationsTheSame(const ir::Instruction* inst1,
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const ir::Instruction* inst2,
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bool ignore_target) const;
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// |f| is run on each decoration instruction for |id| with decoration
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// |decoration|. Processed are all decorations which target |id| either
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// directly or indirectly by Decoration Groups.
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void ForEachDecoration(uint32_t id, uint32_t decoration,
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std::function<void(const ir::Instruction&)> f);
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// Clone all decorations from one id |from|.
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// The cloned decorations are assigned to the given id |to| and are
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// added to the module. The purpose is to decorate cloned instructions.
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// This function does not check if the id |to| is already decorated.
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// Function |f| can be used to update context information and is called
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// with |false|, before an instruction is going to be changed and
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// with |true| afterwards.
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void CloneDecorations(uint32_t from, uint32_t to,
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std::function<void(ir::Instruction&, bool)> f);
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// Informs the decoration manager of a new decoration that it needs to track.
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void AddDecoration(ir::Instruction* inst);
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private:
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// Removes the instruction from the set of decorations targeting |target_id|.
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void RemoveInstructionFromTarget(ir::Instruction* inst,
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const uint32_t target_id);
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using IdToDecorationInstsMap =
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std::unordered_map<uint32_t, std::vector<ir::Instruction*>>;
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// Analyzes the defs and uses in the given |module| and populates data
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// structures in this class. Does nothing if |module| is nullptr.
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void AnalyzeDecorations();
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template <typename T>
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std::vector<T> InternalGetDecorationsFor(uint32_t id, bool include_linkage);
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// Mapping from ids to the instructions applying a decoration to them. In
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// other words, for each id you get all decoration instructions referencing
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// that id, be it directly (SpvOpDecorate, SpvOpMemberDecorate and
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// SpvOpDecorateId), or indirectly (SpvOpGroupDecorate,
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// SpvOpMemberGroupDecorate).
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IdToDecorationInstsMap id_to_decoration_insts_;
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// Mapping from group ids to all the decoration instructions they apply.
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IdToDecorationInstsMap group_to_decoration_insts_;
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// The enclosing module.
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ir::Module* module_;
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};
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} // namespace analysis
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} // namespace opt
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} // namespace spvtools
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#endif // LIBSPIRV_OPT_DECORATION_MANAGER_H_
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