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/*
* Copyright (c) 2024 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "VisibilityValidator.h"
#include "AST.h"
#include "ASTVisitor.h"
#include "WGSLEnums.h"
#include "WGSLShaderModule.h"
#include <wtf/text/MakeString.h>
namespace WGSL {
class VisibilityValidator : public AST::Visitor {
public:
VisibilityValidator(ShaderModule&);
std::optional<FailedCheck> validate();
void visit(AST::Function&) override;
void visit(AST::CallExpression&) override;
private:
template<typename... Arguments>
void error(const SourceSpan&, Arguments&&...);
ShaderModule& m_shaderModule;
Vector<Error> m_errors;
ShaderStage m_stage;
};
VisibilityValidator::VisibilityValidator(ShaderModule& shaderModule)
: m_shaderModule(shaderModule)
{
}
std::optional<FailedCheck> VisibilityValidator::validate()
{
for (auto& entryPoint : m_shaderModule.callGraph().entrypoints()) {
m_stage = entryPoint.stage;
visit(entryPoint.function);
}
if (m_errors.isEmpty())
return std::nullopt;
return FailedCheck { WTFMove(m_errors), { } };
}
void VisibilityValidator::visit(AST::Function& function)
{
AST::Visitor::visit(function);
for (auto& callee : m_shaderModule.callGraph().callees(function))
visit(*callee.target);
}
void VisibilityValidator::visit(AST::CallExpression& call)
{
AST::Visitor::visit(call);
if (!call.visibility().contains(m_stage))
error(call.span(), "built-in cannot be used by "_s, toString(m_stage), " pipeline stage"_s);
}
template<typename... Arguments>
void VisibilityValidator::error(const SourceSpan& span, Arguments&&... arguments)
{
m_errors.append({ makeString(std::forward<Arguments>(arguments)...), span });
}
std::optional<FailedCheck> validateVisibility(ShaderModule& shaderModule)
{
return VisibilityValidator(shaderModule).validate();
}
} // namespace WGSL
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