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https://github.com/KhronosGroup/SPIRV-Tools
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c2013e248b
Currently it is impossible to invalidate the constnat and type manager. However, the compact ids pass changes the ids for the types and constants, which makes them invalid. This change will make them analyses that have to been explicitly marked as preserved by passes. This will allow compact ids to invalidate them. Fixes #2220.
84 lines
3.1 KiB
C++
84 lines
3.1 KiB
C++
// Copyright (c) 2018 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_OPT_COMBINE_ACCESS_CHAINS_H_
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#define SOURCE_OPT_COMBINE_ACCESS_CHAINS_H_
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#include <vector>
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#include "source/opt/pass.h"
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namespace spvtools {
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namespace opt {
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// See optimizer.hpp for documentation.
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class CombineAccessChains : public Pass {
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public:
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const char* name() const override { return "combine-access-chains"; }
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Status Process() override;
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IRContext::Analysis GetPreservedAnalyses() override {
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return IRContext::kAnalysisDefUse |
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IRContext::kAnalysisInstrToBlockMapping |
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IRContext::kAnalysisDecorations | IRContext::kAnalysisCombinators |
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IRContext::kAnalysisCFG | IRContext::kAnalysisDominatorAnalysis |
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IRContext::kAnalysisNameMap | IRContext::kAnalysisConstants |
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IRContext::kAnalysisTypes;
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}
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private:
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// Combine access chains in |function|. Blocks are processed in reverse
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// post-order. Returns true if the function is modified.
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bool ProcessFunction(Function& function);
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// Combines an access chain (normal, in bounds or pointer) |inst| if its base
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// pointer is another access chain. Returns true if the access chain was
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// modified.
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bool CombineAccessChain(Instruction* inst);
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// Returns the value of |constant_inst| as a uint32_t.
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uint32_t GetConstantValue(const analysis::Constant* constant_inst);
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// Returns the array stride of |inst|'s type.
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uint32_t GetArrayStride(const Instruction* inst);
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// Returns the type by resolving the index operands |inst|. |inst| must be an
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// access chain instruction.
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const analysis::Type* GetIndexedType(Instruction* inst);
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// Populates |new_operands| with the operands for the combined access chain.
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// Returns false if the access chains cannot be combined.
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bool CreateNewInputOperands(Instruction* ptr_input, Instruction* inst,
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std::vector<Operand>* new_operands);
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// Combines the last index of |ptr_input| with the element operand of |inst|.
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// Adds the combined operand to |new_operands|.
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bool CombineIndices(Instruction* ptr_input, Instruction* inst,
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std::vector<Operand>* new_operands);
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// Returns the opcode to use for the combined access chain.
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SpvOp UpdateOpcode(SpvOp base_opcode, SpvOp input_opcode);
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// Returns true if |opcode| is a pointer access chain.
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bool IsPtrAccessChain(SpvOp opcode);
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// Returns true if |inst| (an access chain) has 64-bit indices.
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bool Has64BitIndices(Instruction* inst);
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};
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} // namespace opt
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} // namespace spvtools
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#endif // SOURCE_OPT_COMBINE_ACCESS_CHAINS_H_
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