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32 lines
1.1 KiB
32 lines
1.1 KiB
using System; |
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using System.Collections.Generic; |
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using System.Text; |
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namespace ICSharpCode.Decompiler.IL.Transforms |
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{ |
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class CombineExitsTransform : IILTransform |
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{ |
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public void Run(ILFunction function, ILTransformContext context) |
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{ |
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if (!(function.Body is BlockContainer container && container.Blocks.Count == 1)) |
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return; |
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var block = container.EntryPoint; |
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if (block.Kind != BlockKind.ControlFlow) |
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return; |
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if (!(block.Instructions.SecondToLastOrDefault() is IfInstruction ifInst && block.Instructions.LastOrDefault() is Leave leave2)) |
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return; |
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if (!ifInst.FalseInst.MatchNop()) |
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return; |
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if (!(Block.Unwrap(ifInst.TrueInst) is Leave leave)) |
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return; |
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if (!(leave.IsLeavingFunction && leave2.IsLeavingFunction)) |
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return; |
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if (leave.Value.MatchNop() || leave2.Value.MatchNop()) |
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return; |
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IfInstruction value = new IfInstruction(ifInst.Condition, leave.Value, leave2.Value); |
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Leave combinedLeave = new Leave(leave.TargetContainer, value); |
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ifInst.ReplaceWith(combinedLeave); |
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block.Instructions.RemoveAt(combinedLeave.ChildIndex + 1); |
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} |
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} |
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}
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