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https://github.com/KhronosGroup/SPIRV-Tools
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Some transformations (e.g. TransformationAddFunction) rely on running the validator to decide whether the transformation is applicable. A recent change allowed spirv-fuzz to take validator options, to cater for the case where a module should be considered valid under particular conditions. However, validation during the checking of transformations had no access to these validator options. This change introduced TransformationContext, which currently consists of a fact manager and a set of validator options, but could in the future have other fields corresponding to other objects that it is useful to have access to when applying transformations. Now, instead of checking and applying transformations in the context of a FactManager, a TransformationContext is used. This gives access to the fact manager as before, and also access to the validator options when they are needed.
82 lines
3.3 KiB
C++
82 lines
3.3 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_SET_LOOP_CONTROL_H_
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#define SOURCE_FUZZ_TRANSFORMATION_SET_LOOP_CONTROL_H_
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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 TransformationSetLoopControl : public Transformation {
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public:
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const static uint32_t kLoopControlMaskInOperandIndex = 2;
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const static uint32_t kLoopControlFirstLiteralInOperandIndex = 3;
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explicit TransformationSetLoopControl(
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const protobufs::TransformationSetLoopControl& message);
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TransformationSetLoopControl(uint32_t block_id, uint32_t loop_control,
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uint32_t peel_count, uint32_t partial_count);
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// - |message_.block_id| must be a block containing an OpLoopMerge
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// instruction.
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// - |message_.loop_control| must be a legal loop control mask that
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// only uses controls available in the SPIR-V version associated with
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// |ir_context|, and must not add loop controls that are only valid in the
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// presence of guarantees about what the loop does (e.g. MinIterations).
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// - |message_.peel_count| (respectively |message_.partial_count|) must be
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// zero PeelCount (respectively PartialCount) is set in
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// |message_.loop_control|.
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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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// - The loop control operand of the OpLoopMergeInstruction in
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// |message_.block_id| is overwritten with |message_.loop_control|.
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// - The literals associated with the loop control are updated to reflect any
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// controls with associated literals that have been removed (e.g.
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// MinIterations), and any that have been added (PeelCount and/or
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// PartialCount).
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void Apply(opt::IRContext* ir_context,
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TransformationContext* transformation_context) const override;
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protobufs::Transformation ToMessage() const override;
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// Does the version of SPIR-V being used support the PartialCount loop
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// control?
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static bool PartialCountIsSupported(opt::IRContext* ir_context);
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// Does the version of SPIR-V being used support the PeelCount loop control?
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static bool PeelCountIsSupported(opt::IRContext* ir_context);
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private:
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// Returns true if and only if |loop_single_bit_mask| is *not* set in
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// |existing_loop_control| but *is* set in |message_.loop_control|.
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bool LoopControlBitIsAddedByTransformation(
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SpvLoopControlMask loop_control_single_bit_mask,
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uint32_t existing_loop_control_mask) const;
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protobufs::TransformationSetLoopControl 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_SET_LOOP_CONTROL_H_
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