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diff --git a/3rdparty/bgfx/3rdparty/spirv-tools/source/fuzz/fuzzer_pass_adjust_selection_controls.cpp b/3rdparty/bgfx/3rdparty/spirv-tools/source/fuzz/fuzzer_pass_adjust_selection_controls.cpp
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+++ b/3rdparty/bgfx/3rdparty/spirv-tools/source/fuzz/fuzzer_pass_adjust_selection_controls.cpp
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+// Copyright (c) 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "source/fuzz/fuzzer_pass_adjust_selection_controls.h"
+
+#include "source/fuzz/transformation_set_selection_control.h"
+
+namespace spvtools {
+namespace fuzz {
+
+FuzzerPassAdjustSelectionControls::FuzzerPassAdjustSelectionControls(
+ opt::IRContext* ir_context, FactManager* fact_manager,
+ FuzzerContext* fuzzer_context,
+ protobufs::TransformationSequence* transformations)
+ : FuzzerPass(ir_context, fact_manager, fuzzer_context, transformations){};
+
+FuzzerPassAdjustSelectionControls::~FuzzerPassAdjustSelectionControls() =
+ default;
+
+void FuzzerPassAdjustSelectionControls::Apply() {
+ // Consider every merge instruction in the module (via looking through all
+ // functions and blocks).
+ for (auto& function : *GetIRContext()->module()) {
+ for (auto& block : function) {
+ if (auto merge_inst = block.GetMergeInst()) {
+ // Ignore the instruction if it is not a selection merge.
+ if (merge_inst->opcode() != SpvOpSelectionMerge) {
+ continue;
+ }
+
+ // Choose randomly whether to change the selection control for this
+ // instruction.
+ if (!GetFuzzerContext()->ChoosePercentage(
+ GetFuzzerContext()->GetChanceOfAdjustingSelectionControl())) {
+ continue;
+ }
+
+ // The choices to change the selection control to are the set of valid
+ // controls, minus the current control.
+ std::vector<uint32_t> choices;
+ for (auto control :
+ {SpvSelectionControlMaskNone, SpvSelectionControlFlattenMask,
+ SpvSelectionControlDontFlattenMask}) {
+ if (control == merge_inst->GetSingleWordOperand(1)) {
+ continue;
+ }
+ choices.push_back(control);
+ }
+
+ // Apply the transformation and add it to the output transformation
+ // sequence.
+ TransformationSetSelectionControl transformation(
+ block.id(), choices[GetFuzzerContext()->RandomIndex(choices)]);
+ assert(transformation.IsApplicable(GetIRContext(), *GetFactManager()) &&
+ "Transformation should be applicable by construction.");
+ transformation.Apply(GetIRContext(), GetFactManager());
+ *GetTransformations()->add_transformation() =
+ transformation.ToMessage();
+ }
+ }
+ }
+}
+
+} // namespace fuzz
+} // namespace spvtools