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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.
90 lines
3.7 KiB
C++
90 lines
3.7 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_IF_CONVERSION_H_
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#define SOURCE_OPT_IF_CONVERSION_H_
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#include "source/opt/basic_block.h"
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#include "source/opt/ir_builder.h"
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#include "source/opt/pass.h"
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#include "source/opt/types.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 IfConversion : public Pass {
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public:
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const char* name() const override { return "if-conversion"; }
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Status Process() override;
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IRContext::Analysis GetPreservedAnalyses() override {
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return IRContext::kAnalysisDefUse | IRContext::kAnalysisDominatorAnalysis |
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IRContext::kAnalysisInstrToBlockMapping | IRContext::kAnalysisCFG |
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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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// Returns true if |id| is a valid type for use with OpSelect. OpSelect only
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// allows scalars, vectors and pointers as valid inputs.
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bool CheckType(uint32_t id);
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// Returns the basic block containing |id|.
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BasicBlock* GetBlock(uint32_t id);
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// Returns the basic block for the |predecessor|'th index predecessor of
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// |phi|.
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BasicBlock* GetIncomingBlock(Instruction* phi, uint32_t predecessor);
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// Returns the instruction defining the |predecessor|'th index of |phi|.
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Instruction* GetIncomingValue(Instruction* phi, uint32_t predecessor);
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// Returns the id of a OpCompositeConstruct boolean vector. The composite has
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// the same number of elements as |vec_data_ty| and each member is |cond|.
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// |where| indicates the location in |block| to insert the composite
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// construct. If necessary, this function will also construct the necessary
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// type instructions for the boolean vector.
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uint32_t SplatCondition(analysis::Vector* vec_data_ty, uint32_t cond,
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InstructionBuilder* builder);
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// Returns true if none of |phi|'s users are in |block|.
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bool CheckPhiUsers(Instruction* phi, BasicBlock* block);
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// Returns |false| if |block| is not appropriate to transform. Only
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// transforms blocks with two predecessors. Neither incoming block can be
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// dominated by |block|. Both predecessors must share a common dominator that
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// is terminated by a conditional branch.
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bool CheckBlock(BasicBlock* block, DominatorAnalysis* dominators,
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BasicBlock** common);
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// Moves |inst| to |target_block| if it does not already dominate the block.
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// Any instructions that |inst| depends on are move if necessary. It is
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// assumed that |inst| can be hoisted to |target_block| as defined by
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// |CanHoistInstruction|. |dominators| is the dominator analysis for the
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// function that contains |target_block|.
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void HoistInstruction(Instruction* inst, BasicBlock* target_block,
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DominatorAnalysis* dominators);
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// Returns true if it is legal to move |inst| and the instructions it depends
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// on to |target_block| if they do not already dominate |target_block|.
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bool CanHoistInstruction(Instruction* inst, BasicBlock* target_block,
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DominatorAnalysis* dominators);
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};
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} // namespace opt
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} // namespace spvtools
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#endif // SOURCE_OPT_IF_CONVERSION_H_
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