StackOffsetImmediate.h

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// SPDX-License-Identifier: MIT
 
#pragma once
 
#include <cstdint>
#include <memory>
 
#include "mini-llvm/mir/Immediate.h"
#include "mini-llvm/mir/StackSlot.h"
 
namespace mini_llvm::mir {
 
class StackOffsetImmediate final : public Immediate {
public:
    StackOffsetImmediate(StackSlot *baseSlot, StackSlot *slot, int displacement = 0)
        : baseSlot_(baseSlot), slot_(slot), displacement_(displacement) {}
 
    StackSlot *baseSlot() const {
        return baseSlot_;
    }
 
    StackSlot *slot() const {
        return slot_;
    }
 
    int displacement() const {
        return displacement_;
    }
 
    int64_t value() const override {
        return slot()->offset() - baseSlot()->offset() + displacement();
    }
 
    std::unique_ptr<Immediate> clone() const override {
        return std::make_unique<StackOffsetImmediate>(baseSlot(), slot(), displacement());
    }
 
private:
    StackSlot *baseSlot_, *slot_;
    int displacement_;
};
 
} // namespace mini_llvm::mir