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49 lines
1.2 KiB
C++
49 lines
1.2 KiB
C++
#pragma once
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#ifndef JAK_ASSIGNMENT_H
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#define JAK_ASSIGNMENT_H
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#include "third-party/fmt/core.h"
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#include "goalc/emitter/Register.h"
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/*!
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* The assignment of an IRegister to a real Register.
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* For a single IR Instruction.
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*/
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struct Assignment {
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enum class Kind { STACK, REGISTER, UNASSIGNED } kind = Kind::UNASSIGNED;
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emitter::Register reg = -1; //! where the IRegister is now
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int stack_slot = -1; //! index of the slot, if we are ever spilled
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bool spilled = false; //! are we ever spilled
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std::string to_string() const {
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std::string result;
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if (spilled) {
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result += "*";
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}
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switch (kind) {
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case Kind::STACK:
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result += fmt::format("s[{:2d}]", stack_slot);
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break;
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case Kind::REGISTER:
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result += emitter::gRegInfo.get_info(reg).name;
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break;
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case Kind::UNASSIGNED:
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result += "unassigned";
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break;
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default:
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assert(false);
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}
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return result;
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}
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bool occupies_same_reg(const Assignment& other) const { return other.reg == reg && (reg != -1); }
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bool occupies_reg(emitter::Register other_reg) const { return reg == other_reg && (reg != -1); }
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bool is_assigned() const { return kind != Kind::UNASSIGNED; }
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};
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#endif // JAK_ASSIGNMENT_H
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