src/tint/lang/core/ir/next_iteration.h

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#ifndef SRC_TINT_LANG_CORE_IR_NEXT_ITERATION_H_
#define SRC_TINT_LANG_CORE_IR_NEXT_ITERATION_H_

#include <string>

#include "src/tint/lang/core/ir/terminator.h"
#include "src/tint/utils/containers/const_propagating_ptr.h"
#include "src/tint/utils/rtti/castable.h"

// Forward declarations
namespace tint::core::ir {
class Loop;
}  // namespace tint::core::ir

namespace tint::core::ir {

/// A next iteration instruction.
class NextIteration final : public Castable<NextIteration, Terminator> {
  public:
    /// The base offset in Operands() for the args
    static constexpr size_t kArgsOperandOffset = 0;

    /// Constructor (no operands, no loop)
    /// @param id the instruction id
    explicit NextIteration(Id id);

    /// Constructor
    /// @param id the instruction id
    /// @param loop the loop being iterated
    /// @param args the arguments for the MultiInBlock
    NextIteration(Id id, ir::Loop* loop, VectorRef<Value*> args = tint::Empty);

    ~NextIteration() override;

    /// @copydoc Instruction::Clone()
    NextIteration* Clone(CloneContext& ctx) override;

    /// @returns the loop being iterated
    ir::Loop* Loop() { return loop_; }

    /// @returns the loop being iterated
    const ir::Loop* Loop() const { return loop_; }

    /// @param loop the new loop being iterated
    void SetLoop(ir::Loop* loop);

    /// @returns the friendly name for the instruction
    std::string FriendlyName() const override { return "next_iteration"; }

  private:
    ConstPropagatingPtr<ir::Loop> loop_;
};

}  // namespace tint::core::ir

#endif  // SRC_TINT_LANG_CORE_IR_NEXT_ITERATION_H_