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https://github.com/KhronosGroup/SPIRV-Tools
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78 lines
3.2 KiB
C++
78 lines
3.2 KiB
C++
// Copyright (c) 2019 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_FUZZ_TRANSFORMATION_ADD_DEAD_CONTINUE_H_
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#define SOURCE_FUZZ_TRANSFORMATION_ADD_DEAD_CONTINUE_H_
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#include <vector>
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#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
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#include "source/fuzz/transformation.h"
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#include "source/fuzz/transformation_context.h"
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#include "source/opt/ir_context.h"
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namespace spvtools {
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namespace fuzz {
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class TransformationAddDeadContinue : public Transformation {
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public:
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explicit TransformationAddDeadContinue(
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const protobufs::TransformationAddDeadContinue& message);
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TransformationAddDeadContinue(uint32_t from_block,
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bool continue_condition_value,
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std::vector<uint32_t> phi_id);
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// - |message_.from_block| must be the id of a block a in the given module.
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// - a must be contained in a loop with continue target b
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// - The continue target b must be dominated by the head of the loop in which
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// it is contained
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// - b must not be the merge block of a selection construct
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// - if |message_.continue_condition_value| holds (does not hold) then
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// OpConstantTrue (OpConstantFalse) must be present in the module
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// - |message_.phi_ids| must be a list of ids that are all available at
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// |message_.from_block|
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// - a must end with an unconditional branch to some block c.
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// - replacing this branch with a conditional branch to b or c, with
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// the boolean constant associated with |message_.continue_condition_value|
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// as the condition, and the ids in |message_.phi_ids| used to extend any
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// OpPhi instructions at b as a result of the edge from a, must maintain
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// validity of the module.
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// In particular, adding an edge from somewhere in the loop to the continue
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// target must not prevent uses of ids in the continue target from being
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// dominated by the definitions of those ids.
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bool IsApplicable(
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opt::IRContext* ir_context,
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const TransformationContext& transformation_context) const override;
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// Replaces the terminator of a with a conditional branch to b or c.
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// The boolean constant associated with |message_.continue_condition_value| is
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// used as the condition, and the order of b and c is arranged such that
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// control is guaranteed to jump to c.
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void Apply(opt::IRContext* ir_context,
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TransformationContext* transformation_context) const override;
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std::unordered_set<uint32_t> GetFreshIds() const override;
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protobufs::Transformation ToMessage() const override;
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private:
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protobufs::TransformationAddDeadContinue message_;
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};
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} // namespace fuzz
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} // namespace spvtools
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#endif // SOURCE_FUZZ_TRANSFORMATION_ADD_DEAD_CONTINUE_H_
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