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Change-Id: I13c1d6d102e1fe11bd05320e8d363719b94f2552 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/131540 Commit-Queue: Dan Sinclair <dsinclair@chromium.org> Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: Dan Sinclair <dsinclair@chromium.org> Auto-Submit: James Price <jrprice@google.com>
97 lines
2.9 KiB
C++
97 lines
2.9 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 <array>
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#include <optional>
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#include "src/tint/ir/flow_node.h"
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#include "src/tint/symbol.h"
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#include "src/tint/type/type.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 FunctionTerminator;
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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 utils::Castable<Function, FlowNode> {
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public:
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/// The pipeline stage for an entry point
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enum class PipelineStage {
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/// Not a pipeline entry point
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kUndefined,
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/// Vertex
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kCompute,
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/// Fragment
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kFragment,
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/// Vertex
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kVertex,
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};
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/// Attributes attached to return types
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enum class ReturnAttribute {
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/// No return attribute
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kNone,
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/// Location attribute
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kLocation,
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/// Builtin Position attribute
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kPosition,
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/// Builtin FragDepth attribute
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kFragDepth,
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/// Builtin SampleMask
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kSampleMask,
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/// Invariant attribute
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kInvariant,
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};
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/// Constructor
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Function();
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~Function() override;
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/// The function name
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Symbol name;
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/// The pipeline stage for the function, `kUndefined` if the function is not an entry point
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PipelineStage pipeline_stage = PipelineStage::kUndefined;
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/// If this is a `compute` entry point, holds the workgroup size information
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std::optional<std::array<uint32_t, 3>> workgroup_size;
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/// The function return type
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const type::Type* return_type = nullptr;
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/// The function return attributes if any
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utils::Vector<ReturnAttribute, 1> return_attributes;
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/// If the return attribute is `kLocation` this stores the location value.
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std::optional<uint32_t> return_location;
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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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FunctionTerminator* end_target = nullptr;
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};
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utils::StringStream& operator<<(utils::StringStream& out, Function::PipelineStage value);
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utils::StringStream& operator<<(utils::StringStream& out, Function::ReturnAttribute value);
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} // namespace tint::ir
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#endif // SRC_TINT_IR_FUNCTION_H_
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