bbradson
35 lines
1.2 KiB
C#
35 lines
1.2 KiB
C#
// Copyright (c) 2022 bradson
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v.2.0.If a copy of the MPL was not distributed with this
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// file, You can obtain one at https://mozilla.org/MPL/2.0/.
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using FisheryLib.Collections;
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using Mono.Cecil;
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using Mono.Cecil.Cil;
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namespace FisheryLib.Cecil;
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public static class InstructionExtensions
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{
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public static bool LoadsArgument(this Instruction instruction, int index)
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=> instruction.LoadsArgument() && GetLoadArgumentIndex(instruction) == index;
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public static bool LoadsArgument(this Instruction instruction) => LoadArgumentOpcodes.Contains(instruction.OpCode);
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private static int GetLoadArgumentIndex(Instruction instruction)
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{
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var opCode = instruction.OpCode;
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return opCode == OpCodes.Ldarg_0 ? 0
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: opCode == OpCodes.Ldarg_1 ? 1
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: opCode == OpCodes.Ldarg_2 ? 2
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: opCode == OpCodes.Ldarg_3 ? 3
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: instruction.Operand is ParameterDefinition parameterDefinition ? parameterDefinition.Index
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: Convert.Type<object, int>(instruction.Operand);
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}
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public static readonly FishSet<OpCode> LoadArgumentOpcodes =
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[
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OpCodes.Ldarg, OpCodes.Ldarg_0, OpCodes.Ldarg_1, OpCodes.Ldarg_2, OpCodes.Ldarg_3, OpCodes.Ldarg_S,
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OpCodes.Ldarga, OpCodes.Ldarga_S
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];
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} |