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https://github.com/KhronosGroup/SPIRV-Tools
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fcb22ecf0f
Adds a virtual method, GetFreshIds(), to Transformation. Every transformation uses this to indicate which ids in its protobuf message are fresh ids. This means that when replaying a sequence of transformations the replayer can obtain a smallest id that is not in use by the module already and that will not be used by any transformation by necessity. Ids greater than or equal to this id can be used as overflow ids. Fixes #3851.
84 lines
3.4 KiB
C++
84 lines
3.4 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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std::unordered_set<uint32_t> GetFreshIds() 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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