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0dce067e28
This CL adds `while` statement support into the IR builder, converting them into loop flow nodes. Bug: tint:1718 Change-Id: I6dbaa24a0082463281dc933f02805169836fedd6 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/107803 Reviewed-by: Ben Clayton <bclayton@google.com> Commit-Queue: Dan Sinclair <dsinclair@chromium.org> Kokoro: Kokoro <noreply+kokoro@google.com>
48 lines
1.6 KiB
C++
48 lines
1.6 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_LOOP_H_
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#define SRC_TINT_IR_LOOP_H_
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#include "src/tint/ast/statement.h"
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#include "src/tint/ir/block.h"
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#include "src/tint/ir/flow_node.h"
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namespace tint::ir {
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/// Flow node describing a loop.
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class Loop : public Castable<Loop, FlowNode> {
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public:
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/// Constructor
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/// @param stmt the loop, while or for statement.
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explicit Loop(const ast::Statement* stmt);
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~Loop() override;
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/// The ast loop, while or for statement this ir loop is created from.
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const ast::Statement* source;
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/// The start block is the first block in a loop.
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Block* start_target = nullptr;
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/// The continue target of the block.
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Block* continuing_target = nullptr;
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/// The loop merge target. If the `loop` does a `return` then this block may not actually
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/// end up in the control flow. We need it if the loop does a `break` we know where to break
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/// too.
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Block* merge_target = nullptr;
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};
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} // namespace tint::ir
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#endif // SRC_TINT_IR_LOOP_H_
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