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This CL starts adding the basics for an IR for Tint. The IR is a lower level representation then the AST with several of the restrictions removed. For example, the IR is mutable, is a DAG instead of a tree, and removes a number of WGSL constructs to simplify transforms. Bug: tint:1718 Change-Id: I6a16ac3116cee31410896c3a0424af7b41f958c3 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/105800 Commit-Queue: Dan Sinclair <dsinclair@chromium.org> Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: Ben Clayton <bclayton@google.com>
50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
// Copyright 2022 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_TINT_IR_FUNCTION_H_
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#define SRC_TINT_IR_FUNCTION_H_
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#include "src/tint/ast/function.h"
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#include "src/tint/ir/flow_node.h"
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// Forward declarations
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namespace tint::ir {
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class Block;
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class Terminator;
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} // namespace tint::ir
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namespace tint::ir {
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/// An IR representation of a function
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class Function : public Castable<Function, FlowNode> {
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public:
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/// Constructor
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/// @param func the ast::Function to create from
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explicit Function(const ast::Function* func);
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~Function() override;
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/// The ast function this ir function is created from.
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const ast::Function* source;
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/// The start target is the first block in a function.
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Block* start_target = nullptr;
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/// The end target is the end of the function. It is used as the branch target if a return is
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/// encountered in the function.
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Terminator* end_target = nullptr;
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};
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} // namespace tint::ir
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#endif // SRC_TINT_IR_FUNCTION_H_
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