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// Copyright 2021 The Dawn & Tint Authors
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#ifndef SRC_TINT_LANG_WGSL_AST_TRANSFORM_REMOVE_PHONIES_H_
#define SRC_TINT_LANG_WGSL_AST_TRANSFORM_REMOVE_PHONIES_H_
#include <string>
#include <unordered_map>
#include "src/tint/lang/wgsl/ast/transform/transform.h"
namespace tint::ast::transform {
/// RemovePhonies is a Transform that removes all phony-assignment statements,
/// while preserving function call expressions in the RHS of the assignment that
/// may have side-effects. It also removes calls to builtins that return a constant value.
/// @note RemovePhonies must be run after the PromoteSideEffectsToDecl transform, otherwise `f` in
/// `_ = cond && f()` may get hoisted to a call statement without the short-circuiting conditional.
class RemovePhonies final : public Castable<RemovePhonies, Transform> {
public:
/// Constructor
RemovePhonies();
/// Destructor
~RemovePhonies() override;
/// @copydoc Transform::Apply
ApplyResult Apply(const Program& program,
const DataMap& inputs,
DataMap& outputs) const override;
};
} // namespace tint::ast::transform
#endif // SRC_TINT_LANG_WGSL_AST_TRANSFORM_REMOVE_PHONIES_H_