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97b729de10
This CL adds a Transformer base class from which the transformers will inherit. Bug: tint:206 Change-Id: I542eacb05d9a92af46d172a5803c245472c0e22c Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/29120 Commit-Queue: dan sinclair <dsinclair@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
60 lines
2.0 KiB
C++
60 lines
2.0 KiB
C++
// Copyright 2020 The Tint Authors.
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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 SRC_TRANSFORM_BOUND_ARRAY_ACCESSORS_TRANSFORM_H_
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#define SRC_TRANSFORM_BOUND_ARRAY_ACCESSORS_TRANSFORM_H_
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#include "src/ast/array_accessor_expression.h"
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#include "src/ast/expression.h"
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#include "src/ast/module.h"
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#include "src/ast/statement.h"
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#include "src/context.h"
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#include "src/scope_stack.h"
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#include "src/transform/transformer.h"
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#include <string>
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namespace tint {
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namespace transform {
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/// This transformer is responsible for clamping all array accesses to be within
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/// the bounds of the array. Any access before the start of the array will clamp
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/// to zero and any access past the end of the array will clamp to
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/// (array length - 1).
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class BoundArrayAccessorsTransform : public Transformer {
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public:
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/// Constructor
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/// @param ctx the Tint context object
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/// @param mod the module transform
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explicit BoundArrayAccessorsTransform(Context* ctx, ast::Module* mod);
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~BoundArrayAccessorsTransform() override;
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/// @returns true if the transformation was successful
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bool Run() override;
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private:
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bool ProcessStatement(ast::Statement* stmt);
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bool ProcessExpression(ast::Expression* expr);
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bool ProcessArrayAccessor(ast::ArrayAccessorExpression* expr);
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bool ProcessAccessExpression(ast::ArrayAccessorExpression* expr,
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uint32_t size);
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ScopeStack<ast::Variable*> scope_stack_;
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};
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} // namespace transform
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} // namespace tint
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#endif // SRC_TRANSFORM_BOUND_ARRAY_ACCESSORS_TRANSFORM_H_
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