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94 lines
2.2 KiB
C#
94 lines
2.2 KiB
C#
using System.Collections.Generic;
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namespace Ryujinx.Graphics.Shader.IntermediateRepresentation
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{
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class PhiNode : INode
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{
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private Operand _dest;
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public Operand Dest
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{
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get => _dest;
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set => _dest = AssignDest(value);
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}
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private HashSet<BasicBlock> _blocks;
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private class PhiSource
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{
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public BasicBlock Block { get; }
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public Operand Operand { get; set; }
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public PhiSource(BasicBlock block, Operand operand)
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{
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Block = block;
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Operand = operand;
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}
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}
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private List<PhiSource> _sources;
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public int SourcesCount => _sources.Count;
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public PhiNode(Operand dest)
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{
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_blocks = new HashSet<BasicBlock>();
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_sources = new List<PhiSource>();
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dest.AsgOp = this;
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Dest = dest;
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}
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private Operand AssignDest(Operand dest)
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{
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if (dest != null && dest.Type == OperandType.LocalVariable)
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{
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dest.AsgOp = this;
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}
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return dest;
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}
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public void AddSource(BasicBlock block, Operand operand)
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{
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if (_blocks.Add(block))
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{
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if (operand.Type == OperandType.LocalVariable)
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{
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operand.UseOps.Add(this);
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}
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_sources.Add(new PhiSource(block, operand));
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}
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}
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public Operand GetSource(int index)
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{
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return _sources[index].Operand;
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}
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public BasicBlock GetBlock(int index)
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{
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return _sources[index].Block;
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}
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public void SetSource(int index, Operand source)
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{
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Operand oldSrc = _sources[index].Operand;
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if (oldSrc != null && oldSrc.Type == OperandType.LocalVariable)
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{
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oldSrc.UseOps.Remove(this);
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}
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if (source.Type == OperandType.LocalVariable)
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{
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source.UseOps.Add(this);
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}
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_sources[index].Operand = source;
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}
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}
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} |