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b5cd10c7bd
Allows transforms to assert their dependencies have been run before they are. Also allows the backends to validate that their sanitizers have been run before they're used. Change-Id: I1e97afe06f9e7371283bade54bbb2e2c41f87a00 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/55442 Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Ben Clayton <bclayton@google.com> Reviewed-by: James Price <jrprice@google.com>
112 lines
4.1 KiB
C++
112 lines
4.1 KiB
C++
// Copyright 2021 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_SPIRV_H_
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#define SRC_TRANSFORM_SPIRV_H_
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#include <vector>
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#include "src/transform/transform.h"
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namespace tint {
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// Forward declarations
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class CloneContext;
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namespace transform {
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/// Spirv is a transform used to sanitize a Program for use with the Spirv
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/// writer. Passing a non-sanitized Program to the Spirv writer will result in
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/// undefined behavior.
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class Spirv : public Castable<Spirv, Transform> {
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public:
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/// Configuration options for the transform.
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struct Config : public Castable<Config, Data> {
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/// Constructor
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/// @param emit_vertex_point_size `true` to generate a PointSize builtin
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explicit Config(bool emit_vertex_point_size = false);
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/// Copy constructor.
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Config(const Config&);
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/// Destructor.
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~Config() override;
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/// Assignment operator.
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/// @returns this Config
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Config& operator=(const Config&);
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/// Set to `true` to generate a PointSize builtin and have it set to 1.0
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/// from all vertex shaders in the module.
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bool emit_vertex_point_size;
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};
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/// Constructor
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Spirv();
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~Spirv() override;
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/// Runs the transform on `program`, returning the transformation result.
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/// @param program the source program to transform
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/// @param data optional extra transform-specific input data
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/// @returns the transformation result
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Output Run(const Program* program, const DataMap& data = {}) override;
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private:
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/// Hoist entry point parameters, return values, and struct members out to
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/// global variables.
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void HandleEntryPointIOTypes(CloneContext& ctx) const;
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/// Change type of sample mask builtin variables to single element arrays.
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void HandleSampleMaskBuiltins(CloneContext& ctx) const;
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/// Add a PointSize builtin output to the module and set it to 1.0 from all
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/// vertex stage entry points.
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void EmitVertexPointSize(CloneContext& ctx) const;
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/// Add an empty shader entry point if none exist in the module.
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void AddEmptyEntryPoint(CloneContext& ctx) const;
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/// Recursively create module-scope input variables for `ty` and add
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/// function-scope variables for structs to `func`.
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///
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/// For non-structures, create a module-scope input variable.
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/// For structures, recurse into members and then create a function-scope
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/// variable initialized using the variables created for its members.
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/// Return the symbol for the variable that was created.
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Symbol HoistToInputVariables(CloneContext& ctx,
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const ast::Function* func,
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sem::Type* ty,
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ast::Type* declared_ty,
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const ast::DecorationList& decorations) const;
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/// Recursively create module-scope output variables for `ty` and build a list
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/// of assignment instructions to write to them from `store_value`.
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///
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/// For non-structures, create a module-scope output variable and generate the
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/// assignment instruction.
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/// For structures, recurse into members, tracking the chain of member
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/// accessors.
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/// Returns the list of variable assignments in `stores`.
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void HoistToOutputVariables(CloneContext& ctx,
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const ast::Function* func,
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sem::Type* ty,
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ast::Type* declared_ty,
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const ast::DecorationList& decorations,
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std::vector<Symbol> member_accesses,
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Symbol store_value,
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ast::StatementList& stores) const;
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};
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} // namespace transform
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} // namespace tint
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#endif // SRC_TRANSFORM_SPIRV_H_
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