Initial work

15 files changed, 2399 insertions, 0 deletions

diff --git a/Ryujinx.Graphics.Shader/Translation/AttributeConsts.cs b/Ryujinx.Graphics.Shader/Translation/AttributeConsts.cs
new file mode 100644
index 00000000..08aac1ca
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/Translation/AttributeConsts.cs
@@ -0,0 +1,46 @@
+namespace Ryujinx.Graphics.Shader.Translation
+{
+    static class AttributeConsts
+    {
+        public const int Layer         = 0x064;
+        public const int PointSize     = 0x06c;
+        public const int PositionX     = 0x070;
+        public const int PositionY     = 0x074;
+        public const int PositionZ     = 0x078;
+        public const int PositionW     = 0x07c;
+        public const int ClipDistance0 = 0x2c0;
+        public const int ClipDistance1 = 0x2c4;
+        public const int ClipDistance2 = 0x2c8;
+        public const int ClipDistance3 = 0x2cc;
+        public const int ClipDistance4 = 0x2d0;
+        public const int ClipDistance5 = 0x2d4;
+        public const int ClipDistance6 = 0x2d8;
+        public const int ClipDistance7 = 0x2dc;
+        public const int PointCoordX   = 0x2e0;
+        public const int PointCoordY   = 0x2e4;
+        public const int TessCoordX    = 0x2f0;
+        public const int TessCoordY    = 0x2f4;
+        public const int InstanceId    = 0x2f8;
+        public const int VertexId      = 0x2fc;
+        public const int FrontFacing   = 0x3fc;
+
+        public const int UserAttributesCount = 32;
+        public const int UserAttributeBase   = 0x80;
+        public const int UserAttributeEnd    = UserAttributeBase + UserAttributesCount * 16;
+
+
+        // Note: Those attributes are used internally by the translator
+        // only, they don't exist on Maxwell.
+        public const int FragmentOutputDepth     = 0x1000000;
+        public const int FragmentOutputColorBase = 0x1000010;
+        public const int FragmentOutputColorEnd  = FragmentOutputColorBase + 8 * 16;
+
+        public const int ThreadIdX = 0x2000000;
+        public const int ThreadIdY = 0x2000004;
+        public const int ThreadIdZ = 0x2000008;
+
+        public const int CtaIdX = 0x2000010;
+        public const int CtaIdY = 0x2000014;
+        public const int CtaIdZ = 0x2000018;
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.Shader/Translation/ControlFlowGraph.cs b/Ryujinx.Graphics.Shader/Translation/ControlFlowGraph.cs
new file mode 100644
index 00000000..e2ca74a4
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/Translation/ControlFlowGraph.cs
@@ -0,0 +1,108 @@
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+using System.Collections.Generic;
+
+namespace Ryujinx.Graphics.Shader.Translation
+{
+    static class ControlFlowGraph
+    {
+        public static BasicBlock[] MakeCfg(Operation[] operations)
+        {
+            Dictionary<Operand, BasicBlock> labels = new Dictionary<Operand, BasicBlock>();
+
+            List<BasicBlock> blocks = new List<BasicBlock>();
+
+            BasicBlock currentBlock = null;
+
+            void NextBlock(BasicBlock nextBlock)
+            {
+                if (currentBlock != null && !EndsWithUnconditionalInst(currentBlock.GetLastOp()))
+                {
+                    currentBlock.Next = nextBlock;
+                }
+
+                currentBlock = nextBlock;
+            }
+
+            void NewNextBlock()
+            {
+                BasicBlock block = new BasicBlock(blocks.Count);
+
+                blocks.Add(block);
+
+                NextBlock(block);
+            }
+
+            bool needsNewBlock = true;
+
+            for (int index = 0; index < operations.Length; index++)
+            {
+                Operation operation = operations[index];
+
+                if (operation.Inst == Instruction.MarkLabel)
+                {
+                    Operand label = operation.Dest;
+
+                    if (labels.TryGetValue(label, out BasicBlock nextBlock))
+                    {
+                        nextBlock.Index = blocks.Count;
+
+                        blocks.Add(nextBlock);
+
+                        NextBlock(nextBlock);
+                    }
+                    else
+                    {
+                        NewNextBlock();
+
+                        labels.Add(label, currentBlock);
+                    }
+                }
+                else
+                {
+                    if (needsNewBlock)
+                    {
+                        NewNextBlock();
+                    }
+
+                    currentBlock.Operations.AddLast(operation);
+                }
+
+                needsNewBlock = operation.Inst == Instruction.Branch       ||
+                                operation.Inst == Instruction.BranchIfTrue ||
+                                operation.Inst == Instruction.BranchIfFalse;
+
+                if (needsNewBlock)
+                {
+                    Operand label = operation.Dest;
+
+                    if (!labels.TryGetValue(label, out BasicBlock branchBlock))
+                    {
+                        branchBlock = new BasicBlock();
+
+                        labels.Add(label, branchBlock);
+                    }
+
+                    currentBlock.Branch = branchBlock;
+                }
+            }
+
+            return blocks.ToArray();
+        }
+
+        private static bool EndsWithUnconditionalInst(INode node)
+        {
+            if (node is Operation operation)
+            {
+                switch (operation.Inst)
+                {
+                    case Instruction.Branch:
+                    case Instruction.Discard:
+                    case Instruction.Return:
+                        return true;
+                }
+            }
+
+            return false;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.Shader/Translation/Dominance.cs b/Ryujinx.Graphics.Shader/Translation/Dominance.cs
new file mode 100644
index 00000000..6a3ff35f
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/Translation/Dominance.cs
@@ -0,0 +1,127 @@
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+using System.Collections.Generic;
+
+namespace Ryujinx.Graphics.Shader.Translation
+{
+    static class Dominance
+    {
+        // Those methods are an implementation of the algorithms on "A Simple, Fast Dominance Algorithm".
+        // https://www.cs.rice.edu/~keith/EMBED/dom.pdf
+        public static void FindDominators(BasicBlock entry, int blocksCount)
+        {
+            HashSet<BasicBlock> visited = new HashSet<BasicBlock>();
+
+            Stack<BasicBlock> blockStack = new Stack<BasicBlock>();
+
+            List<BasicBlock> postOrderBlocks = new List<BasicBlock>(blocksCount);
+
+            int[] postOrderMap = new int[blocksCount];
+
+            visited.Add(entry);
+
+            blockStack.Push(entry);
+
+            while (blockStack.TryPop(out BasicBlock block))
+            {
+                if (block.Next != null && visited.Add(block.Next))
+                {
+                    blockStack.Push(block);
+                    blockStack.Push(block.Next);
+                }
+                else if (block.Branch != null && visited.Add(block.Branch))
+                {
+                    blockStack.Push(block);
+                    blockStack.Push(block.Branch);
+                }
+                else
+                {
+                    postOrderMap[block.Index] = postOrderBlocks.Count;
+
+                    postOrderBlocks.Add(block);
+                }
+            }
+
+            BasicBlock Intersect(BasicBlock block1, BasicBlock block2)
+            {
+                while (block1 != block2)
+                {
+                    while (postOrderMap[block1.Index] < postOrderMap[block2.Index])
+                    {
+                        block1 = block1.ImmediateDominator;
+                    }
+
+                    while (postOrderMap[block2.Index] < postOrderMap[block1.Index])
+                    {
+                        block2 = block2.ImmediateDominator;
+                    }
+                }
+
+                return block1;
+            }
+
+            entry.ImmediateDominator = entry;
+
+            bool modified;
+
+            do
+            {
+                modified = false;
+
+                for (int blkIndex = postOrderBlocks.Count - 2; blkIndex >= 0; blkIndex--)
+                {
+                    BasicBlock block = postOrderBlocks[blkIndex];
+
+                    BasicBlock newIDom = null;
+
+                    foreach (BasicBlock predecessor in block.Predecessors)
+                    {
+                        if (predecessor.ImmediateDominator != null)
+                        {
+                            if (newIDom != null)
+                            {
+                                newIDom = Intersect(predecessor, newIDom);
+                            }
+                            else
+                            {
+                                newIDom = predecessor;
+                            }
+                        }
+                    }
+
+                    if (block.ImmediateDominator != newIDom)
+                    {
+                        block.ImmediateDominator = newIDom;
+
+                        modified = true;
+                    }
+                }
+            }
+            while (modified);
+        }
+
+        public static void FindDominanceFrontiers(BasicBlock[] blocks)
+        {
+            for (int blkIndex = 0; blkIndex < blocks.Length; blkIndex++)
+            {
+                BasicBlock block = blocks[blkIndex];
+
+                if (block.Predecessors.Count < 2)
+                {
+                    continue;
+                }
+
+                for (int pBlkIndex = 0; pBlkIndex < block.Predecessors.Count; pBlkIndex++)
+                {
+                    BasicBlock current = block.Predecessors[pBlkIndex];
+
+                    while (current != block.ImmediateDominator)
+                    {
+                        current.DominanceFrontiers.Add(block);
+
+                        current = current.ImmediateDominator;
+                    }
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.Shader/Translation/EmitterContext.cs b/Ryujinx.Graphics.Shader/Translation/EmitterContext.cs
new file mode 100644
index 00000000..3995d430
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/Translation/EmitterContext.cs
@@ -0,0 +1,104 @@
+using Ryujinx.Graphics.Shader.Decoders;
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+using System.Collections.Generic;
+
+using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
+
+namespace Ryujinx.Graphics.Shader.Translation
+{
+    class EmitterContext
+    {
+        public Block  CurrBlock { get; set; }
+        public OpCode CurrOp    { get; set; }
+
+        private ShaderStage _stage;
+
+        private ShaderHeader _header;
+
+        private List<Operation> _operations;
+
+        private Dictionary<ulong, Operand> _labels;
+
+        public EmitterContext(ShaderStage stage, ShaderHeader header)
+        {
+            _stage  = stage;
+            _header = header;
+
+            _operations = new List<Operation>();
+
+            _labels = new Dictionary<ulong, Operand>();
+        }
+
+        public Operand Add(Instruction inst, Operand dest = null, params Operand[] sources)
+        {
+            Operation operation = new Operation(inst, dest, sources);
+
+            Add(operation);
+
+            return dest;
+        }
+
+        public void Add(Operation operation)
+        {
+            _operations.Add(operation);
+        }
+
+        public void MarkLabel(Operand label)
+        {
+            Add(Instruction.MarkLabel, label);
+        }
+
+        public Operand GetLabel(ulong address)
+        {
+            if (!_labels.TryGetValue(address, out Operand label))
+            {
+                label = Label();
+
+                _labels.Add(address, label);
+            }
+
+            return label;
+        }
+
+        public void PrepareForReturn()
+        {
+            if (_stage == ShaderStage.Fragment)
+            {
+                if (_header.OmapDepth)
+                {
+                    Operand dest = Attribute(AttributeConsts.FragmentOutputDepth);
+
+                    Operand src = Register(_header.DepthRegister, RegisterType.Gpr);
+
+                    this.Copy(dest, src);
+                }
+
+                int regIndex = 0;
+
+                for (int attachment = 0; attachment < 8; attachment++)
+                {
+                    OutputMapTarget target = _header.OmapTargets[attachment];
+
+                    for (int component = 0; component < 4; component++)
+                    {
+                        if (target.ComponentEnabled(component))
+                        {
+                            Operand dest = Attribute(AttributeConsts.FragmentOutputColorBase + regIndex * 4);
+
+                            Operand src = Register(regIndex, RegisterType.Gpr);
+
+                            this.Copy(dest, src);
+
+                            regIndex++;
+                        }
+                    }
+                }
+            }
+        }
+
+        public Operation[] GetOperations()
+        {
+            return _operations.ToArray();
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.Shader/Translation/EmitterContextInsts.cs b/Ryujinx.Graphics.Shader/Translation/EmitterContextInsts.cs
new file mode 100644
index 00000000..f0bede18
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/Translation/EmitterContextInsts.cs
@@ -0,0 +1,445 @@
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+
+using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
+
+namespace Ryujinx.Graphics.Shader.Translation
+{
+    static class EmitterContextInsts
+    {
+        public static Operand BitfieldExtractS32(this EmitterContext context, Operand a, Operand b, Operand c)
+        {
+            return context.Add(Instruction.BitfieldExtractS32, Local(), a, b, c);
+        }
+
+        public static Operand BitfieldExtractU32(this EmitterContext context, Operand a, Operand b, Operand c)
+        {
+            return context.Add(Instruction.BitfieldExtractU32, Local(), a, b, c);
+        }
+
+        public static Operand BitfieldInsert(this EmitterContext context, Operand a, Operand b, Operand c, Operand d)
+        {
+            return context.Add(Instruction.BitfieldInsert, Local(), a, b, c, d);
+        }
+
+        public static Operand BitfieldReverse(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.BitfieldReverse, Local(), a);
+        }
+
+        public static Operand BitwiseAnd(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.BitwiseAnd, Local(), a, b);
+        }
+
+        public static Operand BitwiseExclusiveOr(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.BitwiseExclusiveOr, Local(), a, b);
+        }
+
+        public static Operand BitwiseNot(this EmitterContext context, Operand a, bool invert)
+        {
+            if (invert)
+            {
+                a = context.BitwiseNot(a);
+            }
+
+            return a;
+        }
+
+        public static Operand BitwiseNot(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.BitwiseNot, Local(), a);
+        }
+
+        public static Operand BitwiseOr(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.BitwiseOr, Local(), a, b);
+        }
+
+        public static Operand Branch(this EmitterContext context, Operand d)
+        {
+            return context.Add(Instruction.Branch, d);
+        }
+
+        public static Operand BranchIfFalse(this EmitterContext context, Operand d, Operand a)
+        {
+            return context.Add(Instruction.BranchIfFalse, d, a);
+        }
+
+        public static Operand BranchIfTrue(this EmitterContext context, Operand d, Operand a)
+        {
+            return context.Add(Instruction.BranchIfTrue, d, a);
+        }
+
+        public static Operand ConditionalSelect(this EmitterContext context, Operand a, Operand b, Operand c)
+        {
+            return context.Add(Instruction.ConditionalSelect, Local(), a, b, c);
+        }
+
+        public static Operand Copy(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.Copy, Local(), a);
+        }
+
+        public static void Copy(this EmitterContext context, Operand d, Operand a)
+        {
+            if (d.Type == OperandType.Constant)
+            {
+                return;
+            }
+
+            context.Add(Instruction.Copy, d, a);
+        }
+
+        public static Operand Discard(this EmitterContext context)
+        {
+            return context.Add(Instruction.Discard);
+        }
+
+        public static Operand EmitVertex(this EmitterContext context)
+        {
+            return context.Add(Instruction.EmitVertex);
+        }
+
+        public static Operand EndPrimitive(this EmitterContext context)
+        {
+            return context.Add(Instruction.EndPrimitive);
+        }
+
+        public static Operand FPAbsNeg(this EmitterContext context, Operand a, bool abs, bool neg)
+        {
+            return context.FPNegate(context.FPAbsolute(a, abs), neg);
+        }
+
+        public static Operand FPAbsolute(this EmitterContext context, Operand a, bool abs)
+        {
+            if (abs)
+            {
+                a = context.FPAbsolute(a);
+            }
+
+            return a;
+        }
+
+        public static Operand FPAbsolute(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.FP | Instruction.Absolute, Local(), a);
+        }
+
+        public static Operand FPAdd(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.FP | Instruction.Add, Local(), a, b);
+        }
+
+        public static Operand FPCeiling(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.FP | Instruction.Ceiling, Local(), a);
+        }
+
+        public static Operand FPCompareEqual(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.FP | Instruction.CompareEqual, Local(), a, b);
+        }
+
+        public static Operand FPCompareLess(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.FP | Instruction.CompareLess, Local(), a, b);
+        }
+
+        public static Operand FPConvertToS32(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.ConvertFPToS32, Local(), a);
+        }
+
+        public static Operand FPCosine(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.FP | Instruction.Cosine, Local(), a);
+        }
+
+        public static Operand FPDivide(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.FP | Instruction.Divide, Local(), a, b);
+        }
+
+        public static Operand FPExponentB2(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.FP | Instruction.ExponentB2, Local(), a);
+        }
+
+        public static Operand FPFloor(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.FP | Instruction.Floor, Local(), a);
+        }
+
+        public static Operand FPLogarithmB2(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.FP | Instruction.LogarithmB2, Local(), a);
+        }
+
+        public static Operand FPMaximum(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.FP | Instruction.Maximum, Local(), a, b);
+        }
+
+        public static Operand FPMinimum(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.FP | Instruction.Minimum, Local(), a, b);
+        }
+
+        public static Operand FPMultiply(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.FP | Instruction.Multiply, Local(), a, b);
+        }
+
+        public static Operand FPFusedMultiplyAdd(this EmitterContext context, Operand a, Operand b, Operand c)
+        {
+            return context.Add(Instruction.FusedMultiplyAdd, Local(), a, b, c);
+        }
+
+        public static Operand FPNegate(this EmitterContext context, Operand a, bool neg)
+        {
+            if (neg)
+            {
+                a = context.FPNegate(a);
+            }
+
+            return a;
+        }
+
+        public static Operand FPNegate(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.FP | Instruction.Negate, Local(), a);
+        }
+
+        public static Operand FPReciprocal(this EmitterContext context, Operand a)
+        {
+            return context.FPDivide(ConstF(1), a);
+        }
+
+        public static Operand FPReciprocalSquareRoot(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.FP | Instruction.ReciprocalSquareRoot, Local(), a);
+        }
+
+        public static Operand FPSaturate(this EmitterContext context, Operand a, bool sat)
+        {
+            if (sat)
+            {
+                a = context.FPSaturate(a);
+            }
+
+            return a;
+        }
+
+        public static Operand FPSaturate(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.FP | Instruction.Clamp, Local(), a, ConstF(0), ConstF(1));
+        }
+
+        public static Operand FPSine(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.FP | Instruction.Sine, Local(), a);
+        }
+
+        public static Operand FPSquareRoot(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.FP | Instruction.SquareRoot, Local(), a);
+        }
+
+        public static Operand FPTruncate(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.Truncate, Local(), a);
+        }
+
+        public static Operand IAbsNeg(this EmitterContext context, Operand a, bool abs, bool neg)
+        {
+            return context.INegate(context.IAbsolute(a, abs), neg);
+        }
+
+        public static Operand IAbsolute(this EmitterContext context, Operand a, bool abs)
+        {
+            if (abs)
+            {
+                a = context.IAbsolute(a);
+            }
+
+            return a;
+        }
+
+        public static Operand IAbsolute(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.Absolute, Local(), a);
+        }
+
+        public static Operand IAdd(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.Add, Local(), a, b);
+        }
+
+        public static Operand IClampS32(this EmitterContext context, Operand a, Operand b, Operand c)
+        {
+            return context.Add(Instruction.Clamp, Local(), a, b, c);
+        }
+
+        public static Operand IClampU32(this EmitterContext context, Operand a, Operand b, Operand c)
+        {
+            return context.Add(Instruction.ClampU32, Local(), a, b, c);
+        }
+
+        public static Operand ICompareEqual(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.CompareEqual, Local(), a, b);
+        }
+
+        public static Operand ICompareLess(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.CompareLess, Local(), a, b);
+        }
+
+        public static Operand ICompareLessUnsigned(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.CompareLessU32, Local(), a, b);
+        }
+
+        public static Operand ICompareNotEqual(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.CompareNotEqual, Local(), a, b);
+        }
+
+        public static Operand IConvertS32ToFP(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.ConvertS32ToFP, Local(), a);
+        }
+
+        public static Operand IConvertU32ToFP(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.ConvertU32ToFP, Local(), a);
+        }
+
+        public static Operand IMaximumS32(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.Maximum, Local(), a, b);
+        }
+
+        public static Operand IMaximumU32(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.MaximumU32, Local(), a, b);
+        }
+
+        public static Operand IMinimumS32(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.Minimum, Local(), a, b);
+        }
+
+        public static Operand IMinimumU32(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.MinimumU32, Local(), a, b);
+        }
+
+        public static Operand IMultiply(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.Multiply, Local(), a, b);
+        }
+
+        public static Operand INegate(this EmitterContext context, Operand a, bool neg)
+        {
+            if (neg)
+            {
+                a = context.INegate(a);
+            }
+
+            return a;
+        }
+
+        public static Operand INegate(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.Negate, Local(), a);
+        }
+
+        public static Operand ISubtract(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.Subtract, Local(), a, b);
+        }
+
+        public static Operand IsNan(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.IsNan, Local(), a);
+        }
+
+        public static Operand LoadAttribute(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.LoadAttribute, Local(), a, b);
+        }
+
+        public static Operand LoadConstant(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.LoadConstant, Local(), a, b);
+        }
+
+        public static Operand LoadGlobal(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.LoadGlobal, Local(), a);
+        }
+
+        public static Operand LoadLocal(this EmitterContext context, Operand a)
+        {
+            return context.Add(Instruction.LoadLocal, Local(), a);
+        }
+
+        public static Operand PackHalf2x16(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.PackHalf2x16, Local(), a, b);
+        }
+
+        public static Operand Return(this EmitterContext context)
+        {
+            context.PrepareForReturn();
+
+            return context.Add(Instruction.Return);
+        }
+
+        public static Operand ShiftLeft(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.ShiftLeft, Local(), a, b);
+        }
+
+        public static Operand ShiftRightS32(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.ShiftRightS32, Local(), a, b);
+        }
+
+        public static Operand ShiftRightU32(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.ShiftRightU32, Local(), a, b);
+        }
+
+        public static Operand StoreGlobal(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.StoreGlobal, null, a, b);
+        }
+
+        public static Operand StoreLocal(this EmitterContext context, Operand a, Operand b)
+        {
+            return context.Add(Instruction.StoreLocal, null, a, b);
+        }
+
+        public static Operand UnpackHalf2x16High(this EmitterContext context, Operand a)
+        {
+            return UnpackHalf2x16(context, a, 1);
+        }
+
+        public static Operand UnpackHalf2x16Low(this EmitterContext context, Operand a)
+        {
+            return UnpackHalf2x16(context, a, 0);
+        }
+
+        private static Operand UnpackHalf2x16(this EmitterContext context, Operand a, int index)
+        {
+            Operand dest = Local();
+
+            context.Add(new Operation(Instruction.UnpackHalf2x16, index, dest, a));
+
+            return dest;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.Shader/Translation/Optimizations/BranchElimination.cs b/Ryujinx.Graphics.Shader/Translation/Optimizations/BranchElimination.cs
new file mode 100644
index 00000000..c87d1474
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/Translation/Optimizations/BranchElimination.cs
@@ -0,0 +1,64 @@
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+using System;
+
+namespace Ryujinx.Graphics.Shader.Translation.Optimizations
+{
+    static class BranchElimination
+    {
+        public static bool RunPass(BasicBlock block)
+        {
+            if (block.HasBranch && IsRedundantBranch((Operation)block.GetLastOp(), Next(block)))
+            {
+                block.Branch = null;
+
+                return true;
+            }
+
+            return false;
+        }
+
+        private static bool IsRedundantBranch(Operation current, BasicBlock nextBlock)
+        {
+            // Here we check that:
+            // - The current block ends with a branch.
+            // - The next block only contains a branch.
+            // - The branch on the next block is unconditional.
+            // - Both branches are jumping to the same location.
+            // In this case, the branch on the current block can be removed,
+            // as the next block is going to jump to the same place anyway.
+            if (nextBlock == null)
+            {
+                return false;
+            }
+
+            if (!(nextBlock.Operations.First?.Value is Operation next))
+            {
+                return false;
+            }
+
+            if (next.Inst != Instruction.Branch)
+            {
+                return false;
+            }
+
+            return current.Dest == next.Dest;
+        }
+
+        private static BasicBlock Next(BasicBlock block)
+        {
+            block = block.Next;
+
+            while (block != null && block.Operations.Count == 0)
+            {
+                if (block.HasBranch)
+                {
+                    throw new InvalidOperationException("Found a bogus empty block that \"ends with a branch\".");
+                }
+
+                block = block.Next;
+            }
+
+            return block;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.Shader/Translation/Optimizations/ConstantFolding.cs b/Ryujinx.Graphics.Shader/Translation/Optimizations/ConstantFolding.cs
new file mode 100644
index 00000000..d64579b7
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/Translation/Optimizations/ConstantFolding.cs
@@ -0,0 +1,323 @@
+using Ryujinx.Graphics.Shader.Decoders;
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+using System;
+
+using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
+
+namespace Ryujinx.Graphics.Shader.Translation.Optimizations
+{
+    static class ConstantFolding
+    {
+        public static void RunPass(Operation operation)
+        {
+            if (!AreAllSourcesConstant(operation))
+            {
+                return;
+            }
+
+            switch (operation.Inst)
+            {
+                case Instruction.Add:
+                    EvaluateBinary(operation, (x, y) => x + y);
+                    break;
+
+                case Instruction.BitwiseAnd:
+                    EvaluateBinary(operation, (x, y) => x & y);
+                    break;
+
+                case Instruction.BitwiseExclusiveOr:
+                    EvaluateBinary(operation, (x, y) => x ^ y);
+                    break;
+
+                case Instruction.BitwiseNot:
+                    EvaluateUnary(operation, (x) => ~x);
+                    break;
+
+                case Instruction.BitwiseOr:
+                    EvaluateBinary(operation, (x, y) => x | y);
+                    break;
+
+                case Instruction.BitfieldExtractS32:
+                    BitfieldExtractS32(operation);
+                    break;
+
+                case Instruction.BitfieldExtractU32:
+                    BitfieldExtractU32(operation);
+                    break;
+
+                case Instruction.Clamp:
+                    EvaluateTernary(operation, (x, y, z) => Math.Clamp(x, y, z));
+                    break;
+
+                case Instruction.ClampU32:
+                    EvaluateTernary(operation, (x, y, z) => (int)Math.Clamp((uint)x, (uint)y, (uint)z));
+                    break;
+
+                case Instruction.CompareEqual:
+                    EvaluateBinary(operation, (x, y) => x == y);
+                    break;
+
+                case Instruction.CompareGreater:
+                    EvaluateBinary(operation, (x, y) => x > y);
+                    break;
+
+                case Instruction.CompareGreaterOrEqual:
+                    EvaluateBinary(operation, (x, y) => x >= y);
+                    break;
+
+                case Instruction.CompareGreaterOrEqualU32:
+                    EvaluateBinary(operation, (x, y) => (uint)x >= (uint)y);
+                    break;
+
+                case Instruction.CompareGreaterU32:
+                    EvaluateBinary(operation, (x, y) => (uint)x > (uint)y);
+                    break;
+
+                case Instruction.CompareLess:
+                    EvaluateBinary(operation, (x, y) => x < y);
+                    break;
+
+                case Instruction.CompareLessOrEqual:
+                    EvaluateBinary(operation, (x, y) => x <= y);
+                    break;
+
+                case Instruction.CompareLessOrEqualU32:
+                    EvaluateBinary(operation, (x, y) => (uint)x <= (uint)y);
+                    break;
+
+                case Instruction.CompareLessU32:
+                    EvaluateBinary(operation, (x, y) => (uint)x < (uint)y);
+                    break;
+
+                case Instruction.CompareNotEqual:
+                    EvaluateBinary(operation, (x, y) => x != y);
+                    break;
+
+                case Instruction.Divide:
+                    EvaluateBinary(operation, (x, y) => y != 0 ? x / y : 0);
+                    break;
+
+                case Instruction.FP | Instruction.Add:
+                    EvaluateFPBinary(operation, (x, y) => x + y);
+                    break;
+
+                case Instruction.FP | Instruction.Clamp:
+                    EvaluateFPTernary(operation, (x, y, z) => Math.Clamp(x, y, z));
+                    break;
+
+                case Instruction.FP | Instruction.CompareEqual:
+                    EvaluateFPBinary(operation, (x, y) => x == y);
+                    break;
+
+                case Instruction.FP | Instruction.CompareGreater:
+                    EvaluateFPBinary(operation, (x, y) => x > y);
+                    break;
+
+                case Instruction.FP | Instruction.CompareGreaterOrEqual:
+                    EvaluateFPBinary(operation, (x, y) => x >= y);
+                    break;
+
+                case Instruction.FP | Instruction.CompareLess:
+                    EvaluateFPBinary(operation, (x, y) => x < y);
+                    break;
+
+                case Instruction.FP | Instruction.CompareLessOrEqual:
+                    EvaluateFPBinary(operation, (x, y) => x <= y);
+                    break;
+
+                case Instruction.FP | Instruction.CompareNotEqual:
+                    EvaluateFPBinary(operation, (x, y) => x != y);
+                    break;
+
+                case Instruction.FP | Instruction.Divide:
+                    EvaluateFPBinary(operation, (x, y) => x / y);
+                    break;
+
+                case Instruction.FP | Instruction.Multiply:
+                    EvaluateFPBinary(operation, (x, y) => x * y);
+                    break;
+
+                case Instruction.FP | Instruction.Negate:
+                    EvaluateFPUnary(operation, (x) => -x);
+                    break;
+
+                case Instruction.FP | Instruction.Subtract:
+                    EvaluateFPBinary(operation, (x, y) => x - y);
+                    break;
+
+                case Instruction.IsNan:
+                    EvaluateFPUnary(operation, (x) => float.IsNaN(x));
+                    break;
+
+                case Instruction.Maximum:
+                    EvaluateBinary(operation, (x, y) => Math.Max(x, y));
+                    break;
+
+                case Instruction.MaximumU32:
+                    EvaluateBinary(operation, (x, y) => (int)Math.Max((uint)x, (uint)y));
+                    break;
+
+                case Instruction.Minimum:
+                    EvaluateBinary(operation, (x, y) => Math.Min(x, y));
+                    break;
+
+                case Instruction.MinimumU32:
+                    EvaluateBinary(operation, (x, y) => (int)Math.Min((uint)x, (uint)y));
+                    break;
+
+                case Instruction.Multiply:
+                    EvaluateBinary(operation, (x, y) => x * y);
+                    break;
+
+                case Instruction.Negate:
+                    EvaluateUnary(operation, (x) => -x);
+                    break;
+
+                case Instruction.ShiftLeft:
+                    EvaluateBinary(operation, (x, y) => x << y);
+                    break;
+
+                case Instruction.ShiftRightS32:
+                    EvaluateBinary(operation, (x, y) => x >> y);
+                    break;
+
+                case Instruction.ShiftRightU32:
+                    EvaluateBinary(operation, (x, y) => (int)((uint)x >> y));
+                    break;
+
+                case Instruction.Subtract:
+                    EvaluateBinary(operation, (x, y) => x - y);
+                    break;
+
+                case Instruction.UnpackHalf2x16:
+                    UnpackHalf2x16(operation);
+                    break;
+            }
+        }
+
+        private static bool AreAllSourcesConstant(Operation operation)
+        {
+            for (int index = 0; index < operation.SourcesCount; index++)
+            {
+                if (operation.GetSource(index).Type != OperandType.Constant)
+                {
+                    return false;
+                }
+            }
+
+            return true;
+        }
+
+        private static void BitfieldExtractS32(Operation operation)
+        {
+            int value = GetBitfieldExtractValue(operation);
+
+            int shift = 32 - operation.GetSource(2).Value;
+
+            value = (value << shift) >> shift;
+
+            operation.TurnIntoCopy(Const(value));
+        }
+
+        private static void BitfieldExtractU32(Operation operation)
+        {
+            operation.TurnIntoCopy(Const(GetBitfieldExtractValue(operation)));
+        }
+
+        private static int GetBitfieldExtractValue(Operation operation)
+        {
+            int value  = operation.GetSource(0).Value;
+            int lsb    = operation.GetSource(1).Value;
+            int length = operation.GetSource(2).Value;
+
+            return value.Extract(lsb, length);
+        }
+
+        private static void UnpackHalf2x16(Operation operation)
+        {
+            int value = operation.GetSource(0).Value;
+
+            value = (value >> operation.ComponentIndex * 16) & 0xffff;
+
+            operation.TurnIntoCopy(ConstF(HalfConversion.HalfToSingle(value)));
+        }
+
+        private static void FPNegate(Operation operation)
+        {
+            float value = operation.GetSource(0).AsFloat();
+
+            operation.TurnIntoCopy(ConstF(-value));
+        }
+
+        private static void EvaluateUnary(Operation operation, Func<int, int> op)
+        {
+            int x = operation.GetSource(0).Value;
+
+            operation.TurnIntoCopy(Const(op(x)));
+        }
+
+        private static void EvaluateFPUnary(Operation operation, Func<float, float> op)
+        {
+            float x = operation.GetSource(0).AsFloat();
+
+            operation.TurnIntoCopy(ConstF(op(x)));
+        }
+
+        private static void EvaluateFPUnary(Operation operation, Func<float, bool> op)
+        {
+            float x = operation.GetSource(0).AsFloat();
+
+            operation.TurnIntoCopy(Const(op(x) ? IrConsts.True : IrConsts.False));
+        }
+
+        private static void EvaluateBinary(Operation operation, Func<int, int, int> op)
+        {
+            int x = operation.GetSource(0).Value;
+            int y = operation.GetSource(1).Value;
+
+            operation.TurnIntoCopy(Const(op(x, y)));
+        }
+
+        private static void EvaluateBinary(Operation operation, Func<int, int, bool> op)
+        {
+            int x = operation.GetSource(0).Value;
+            int y = operation.GetSource(1).Value;
+
+            operation.TurnIntoCopy(Const(op(x, y) ? IrConsts.True : IrConsts.False));
+        }
+
+        private static void EvaluateFPBinary(Operation operation, Func<float, float, float> op)
+        {
+            float x = operation.GetSource(0).AsFloat();
+            float y = operation.GetSource(1).AsFloat();
+
+            operation.TurnIntoCopy(ConstF(op(x, y)));
+        }
+
+        private static void EvaluateFPBinary(Operation operation, Func<float, float, bool> op)
+        {
+            float x = operation.GetSource(0).AsFloat();
+            float y = operation.GetSource(1).AsFloat();
+
+            operation.TurnIntoCopy(Const(op(x, y) ? IrConsts.True : IrConsts.False));
+        }
+
+        private static void EvaluateTernary(Operation operation, Func<int, int, int, int> op)
+        {
+            int x = operation.GetSource(0).Value;
+            int y = operation.GetSource(1).Value;
+            int z = operation.GetSource(2).Value;
+
+            operation.TurnIntoCopy(Const(op(x, y, z)));
+        }
+
+        private static void EvaluateFPTernary(Operation operation, Func<float, float, float, float> op)
+        {
+            float x = operation.GetSource(0).AsFloat();
+            float y = operation.GetSource(1).AsFloat();
+            float z = operation.GetSource(2).AsFloat();
+
+            operation.TurnIntoCopy(ConstF(op(x, y, z)));
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.Shader/Translation/Optimizations/GlobalToStorage.cs b/Ryujinx.Graphics.Shader/Translation/Optimizations/GlobalToStorage.cs
new file mode 100644
index 00000000..06db2a80
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/Translation/Optimizations/GlobalToStorage.cs
@@ -0,0 +1,145 @@
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+using System.Collections.Generic;
+
+using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
+
+namespace Ryujinx.Graphics.Shader.Translation.Optimizations
+{
+    static class GlobalToStorage
+    {
+        private const int StorageDescsBaseOffset = 0x44; // In words.
+
+        private const int UbeStorageDescsBaseOffset = 0x84; // In words.
+        private const int UbeStorageMaxCount        = 14;
+
+        private const int StorageDescSize = 4; // In words.
+        private const int StorageMaxCount = 16;
+
+        private const int StorageDescsSize  = StorageDescSize * StorageMaxCount;
+
+        public static void RunPass(BasicBlock block, ShaderStage stage)
+        {
+            int sbStart = GetStorageBaseCbOffset(stage);
+
+            int sbEnd = sbStart + StorageDescsSize;
+
+            // This one is only used on compute shaders.
+            // Compute shaders uses two separate sets of storage.
+            int ubeSbStart = UbeStorageDescsBaseOffset;
+            int ubeSbEnd   = UbeStorageDescsBaseOffset + StorageDescSize * UbeStorageMaxCount;
+
+            for (LinkedListNode<INode> node = block.Operations.First; node != null; node = node.Next)
+            {
+                if (!(node.Value is Operation operation))
+                {
+                    continue;
+                }
+
+                if (operation.Inst == Instruction.LoadGlobal ||
+                    operation.Inst == Instruction.StoreGlobal)
+                {
+                    Operand source = operation.GetSource(0);
+
+                    if (source.AsgOp is Operation asgOperation)
+                    {
+                        int storageIndex = SearchForStorageBase(asgOperation, sbStart, sbEnd);
+
+                        /*if (storageIndex < 0 && stage == ShaderStage.Compute)
+                        {
+                            storageIndex = SearchForStorageBase(asgOperation, ubeSbStart, ubeSbEnd);
+                        }*/
+
+                        if (storageIndex >= 0)
+                        {
+                            node = ReplaceGlobalWithStorage(node, storageIndex);
+                        }
+                    }
+                }
+            }
+        }
+
+        private static LinkedListNode<INode> ReplaceGlobalWithStorage(LinkedListNode<INode> node, int storageIndex)
+        {
+            Operation operation = (Operation)node.Value;
+
+            Operation storageOp;
+
+            if (operation.Inst == Instruction.LoadGlobal)
+            {
+                Operand source = operation.GetSource(0);
+
+                storageOp = new Operation(Instruction.LoadStorage, operation.Dest, Const(storageIndex), source);
+            }
+            else
+            {
+                Operand src1 = operation.GetSource(0);
+                Operand src2 = operation.GetSource(1);
+
+                storageOp = new Operation(Instruction.StoreStorage, null, Const(storageIndex), src1, src2);
+            }
+
+            for (int index = 0; index < operation.SourcesCount; index++)
+            {
+                operation.SetSource(index, null);
+            }
+
+            LinkedListNode<INode> oldNode = node;
+
+            node = node.List.AddAfter(node, storageOp);
+
+            node.List.Remove(oldNode);
+
+            return node;
+        }
+
+        private static int SearchForStorageBase(Operation operation, int sbStart, int sbEnd)
+        {
+            Queue<Operation> assignments = new Queue<Operation>();
+
+            assignments.Enqueue(operation);
+
+            while (assignments.TryDequeue(out operation))
+            {
+                for (int index = 0; index < operation.SourcesCount; index++)
+                {
+                    Operand source = operation.GetSource(index);
+
+                    if (source.Type == OperandType.ConstantBuffer)
+                    {
+                        int slot   = source.GetCbufSlot();
+                        int offset = source.GetCbufOffset();
+
+                        if (slot == 0 && offset >= sbStart && offset < sbEnd)
+                        {
+                            int storageIndex = (offset - sbStart) / StorageDescSize;
+
+                            return storageIndex;
+                        }
+                    }
+
+                    if (source.AsgOp is Operation asgOperation)
+                    {
+                        assignments.Enqueue(asgOperation);
+                    }
+                }
+            }
+
+            return -1;
+        }
+
+        private static int GetStorageBaseCbOffset(ShaderStage stage)
+        {
+            switch (stage)
+            {
+                case ShaderStage.Compute:                return StorageDescsBaseOffset + 2 * StorageDescsSize;
+                case ShaderStage.Vertex:                 return StorageDescsBaseOffset;
+                case ShaderStage.TessellationControl:    return StorageDescsBaseOffset + 1 * StorageDescsSize;
+                case ShaderStage.TessellationEvaluation: return StorageDescsBaseOffset + 2 * StorageDescsSize;
+                case ShaderStage.Geometry:               return StorageDescsBaseOffset + 3 * StorageDescsSize;
+                case ShaderStage.Fragment:               return StorageDescsBaseOffset + 4 * StorageDescsSize;
+            }
+
+            return 0;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.Shader/Translation/Optimizations/HalfConversion.cs b/Ryujinx.Graphics.Shader/Translation/Optimizations/HalfConversion.cs
new file mode 100644
index 00000000..96060272
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/Translation/Optimizations/HalfConversion.cs
@@ -0,0 +1,47 @@
+using System;
+
+namespace Ryujinx.Graphics.Shader.Translation.Optimizations
+{
+    static class HalfConversion
+    {
+        public static float HalfToSingle(int value)
+        {
+            int mantissa = (value >> 0)  & 0x3ff;
+            int exponent = (value >> 10) & 0x1f;
+            int sign     = (value >> 15) & 0x1;
+
+            if (exponent == 0x1f)
+            {
+                // NaN or Infinity.
+                mantissa <<= 13;
+                exponent   = 0xff;
+            }
+            else if (exponent != 0 || mantissa != 0 )
+            {
+                if (exponent == 0)
+                {
+                    // Denormal.
+                    int e = -1;
+                    int m = mantissa;
+
+                    do
+                    {
+                        e++;
+                        m <<= 1;
+                    }
+                    while ((m & 0x400) == 0);
+
+                    mantissa = m & 0x3ff;
+                    exponent = e;
+                }
+
+                mantissa <<= 13;
+                exponent   = 127 - 15 + exponent;
+            }
+
+            int output = (sign << 31) | (exponent << 23) | mantissa;
+
+            return BitConverter.Int32BitsToSingle(output);
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.Shader/Translation/Optimizations/Optimizer.cs b/Ryujinx.Graphics.Shader/Translation/Optimizations/Optimizer.cs
new file mode 100644
index 00000000..d5e57546
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/Translation/Optimizations/Optimizer.cs
@@ -0,0 +1,177 @@
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Ryujinx.Graphics.Shader.Translation.Optimizations
+{
+    static class Optimizer
+    {
+        public static void Optimize(BasicBlock[] blocks, ShaderStage stage)
+        {
+            for (int blkIndex = 0; blkIndex < blocks.Length; blkIndex++)
+            {
+                GlobalToStorage.RunPass(blocks[blkIndex], stage);
+            }
+
+            bool modified;
+
+            do
+            {
+                modified = false;
+
+                for (int blkIndex = 0; blkIndex < blocks.Length; blkIndex++)
+                {
+                    BasicBlock block = blocks[blkIndex];
+
+                    LinkedListNode<INode> node = block.Operations.First;
+
+                    while (node != null)
+                    {
+                        LinkedListNode<INode> nextNode = node.Next;
+
+                        bool isUnused = IsUnused(node.Value);
+
+                        if (!(node.Value is Operation operation) || isUnused)
+                        {
+                            if (isUnused)
+                            {
+                                RemoveNode(block, node);
+
+                                modified = true;
+                            }
+
+                            node = nextNode;
+
+                            continue;
+                        }
+
+                        ConstantFolding.RunPass(operation);
+
+                        Simplification.RunPass(operation);
+
+                        if (DestIsLocalVar(operation))
+                        {
+                            if (operation.Inst == Instruction.Copy)
+                            {
+                                PropagateCopy(operation);
+
+                                RemoveNode(block, node);
+
+                                modified = true;
+                            }
+                            else if (operation.Inst == Instruction.PackHalf2x16 && PropagatePack(operation))
+                            {
+                                if (operation.Dest.UseOps.Count == 0)
+                                {
+                                    RemoveNode(block, node);
+                                }
+
+                                modified = true;
+                            }
+                        }
+
+                        node = nextNode;
+                    }
+
+                    if (BranchElimination.RunPass(block))
+                    {
+                        RemoveNode(block, block.Operations.Last);
+
+                        modified = true;
+                    }
+                }
+            }
+            while (modified);
+        }
+
+        private static void PropagateCopy(Operation copyOp)
+        {
+            // Propagate copy source operand to all uses of
+            // the destination operand.
+            Operand dest = copyOp.Dest;
+            Operand src  = copyOp.GetSource(0);
+
+            INode[] uses = dest.UseOps.ToArray();
+
+            foreach (INode useNode in uses)
+            {
+                for (int index = 0; index < useNode.SourcesCount; index++)
+                {
+                    if (useNode.GetSource(index) == dest)
+                    {
+                        useNode.SetSource(index, src);
+                    }
+                }
+            }
+        }
+
+        private static bool PropagatePack(Operation packOp)
+        {
+            // Propagate pack source operands to uses by unpack
+            // instruction. The source depends on the unpack instruction.
+            bool modified = false;
+
+            Operand dest = packOp.Dest;
+            Operand src0 = packOp.GetSource(0);
+            Operand src1 = packOp.GetSource(1);
+
+            INode[] uses = dest.UseOps.ToArray();
+
+            foreach (INode useNode in uses)
+            {
+                if (!(useNode is Operation operation) || operation.Inst != Instruction.UnpackHalf2x16)
+                {
+                    continue;
+                }
+
+                if (operation.GetSource(0) == dest)
+                {
+                    operation.TurnIntoCopy(operation.ComponentIndex == 1 ? src1 : src0);
+
+                    modified = true;
+                }
+            }
+
+            return modified;
+        }
+
+        private static void RemoveNode(BasicBlock block, LinkedListNode<INode> llNode)
+        {
+            // Remove a node from the nodes list, and also remove itself
+            // from all the use lists on the operands that this node uses.
+            block.Operations.Remove(llNode);
+
+            Queue<INode> nodes = new Queue<INode>();
+
+            nodes.Enqueue(llNode.Value);
+
+            while (nodes.TryDequeue(out INode node))
+            {
+                for (int index = 0; index < node.SourcesCount; index++)
+                {
+                    Operand src = node.GetSource(index);
+
+                    if (src.Type != OperandType.LocalVariable)
+                    {
+                        continue;
+                    }
+
+                    if (src.UseOps.Remove(node) && src.UseOps.Count == 0)
+                    {
+                        nodes.Enqueue(src.AsgOp);
+                    }
+                }
+            }
+        }
+
+        private static bool IsUnused(INode node)
+        {
+            return DestIsLocalVar(node) && node.Dest.UseOps.Count == 0;
+        }
+
+        private static bool DestIsLocalVar(INode node)
+        {
+            return node.Dest != null && node.Dest.Type == OperandType.LocalVariable;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.Shader/Translation/Optimizations/Simplification.cs b/Ryujinx.Graphics.Shader/Translation/Optimizations/Simplification.cs
new file mode 100644
index 00000000..8d05f99a
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/Translation/Optimizations/Simplification.cs
@@ -0,0 +1,147 @@
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+
+using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
+
+namespace Ryujinx.Graphics.Shader.Translation.Optimizations
+{
+    static class Simplification
+    {
+        private const int AllOnes = ~0;
+
+        public static void RunPass(Operation operation)
+        {
+            switch (operation.Inst)
+            {
+                case Instruction.Add:
+                case Instruction.BitwiseExclusiveOr:
+                    TryEliminateBinaryOpCommutative(operation, 0);
+                    break;
+
+                case Instruction.BitwiseAnd:
+                    TryEliminateBitwiseAnd(operation);
+                    break;
+
+                case Instruction.BitwiseOr:
+                    TryEliminateBitwiseOr(operation);
+                    break;
+
+                case Instruction.ConditionalSelect:
+                    TryEliminateConditionalSelect(operation);
+                    break;
+
+                case Instruction.Divide:
+                    TryEliminateBinaryOpY(operation, 1);
+                    break;
+
+                case Instruction.Multiply:
+                    TryEliminateBinaryOpCommutative(operation, 1);
+                    break;
+
+                case Instruction.ShiftLeft:
+                case Instruction.ShiftRightS32:
+                case Instruction.ShiftRightU32:
+                case Instruction.Subtract:
+                    TryEliminateBinaryOpY(operation, 0);
+                    break;
+            }
+        }
+
+        private static void TryEliminateBitwiseAnd(Operation operation)
+        {
+            // Try to recognize and optimize those 3 patterns (in order):
+            // x & 0xFFFFFFFF == x,          0xFFFFFFFF & y == y,
+            // x & 0x00000000 == 0x00000000, 0x00000000 & y == 0x00000000
+            Operand x = operation.GetSource(0);
+            Operand y = operation.GetSource(1);
+
+            if (IsConstEqual(x, AllOnes))
+            {
+                operation.TurnIntoCopy(y);
+            }
+            else if (IsConstEqual(y, AllOnes))
+            {
+                operation.TurnIntoCopy(x);
+            }
+            else if (IsConstEqual(x, 0) || IsConstEqual(y, 0))
+            {
+                operation.TurnIntoCopy(Const(0));
+            }
+        }
+
+        private static void TryEliminateBitwiseOr(Operation operation)
+        {
+            // Try to recognize and optimize those 3 patterns (in order):
+            // x | 0x00000000 == x,          0x00000000 | y == y,
+            // x | 0xFFFFFFFF == 0xFFFFFFFF, 0xFFFFFFFF | y == 0xFFFFFFFF
+            Operand x = operation.GetSource(0);
+            Operand y = operation.GetSource(1);
+
+            if (IsConstEqual(x, 0))
+            {
+                operation.TurnIntoCopy(y);
+            }
+            else if (IsConstEqual(y, 0))
+            {
+                operation.TurnIntoCopy(x);
+            }
+            else if (IsConstEqual(x, AllOnes) || IsConstEqual(y, AllOnes))
+            {
+                operation.TurnIntoCopy(Const(AllOnes));
+            }
+        }
+
+        private static void TryEliminateBinaryOpY(Operation operation, int comparand)
+        {
+            Operand x = operation.GetSource(0);
+            Operand y = operation.GetSource(1);
+
+            if (IsConstEqual(y, comparand))
+            {
+                operation.TurnIntoCopy(x);
+            }
+        }
+
+        private static void TryEliminateBinaryOpCommutative(Operation operation, int comparand)
+        {
+            Operand x = operation.GetSource(0);
+            Operand y = operation.GetSource(1);
+
+            if (IsConstEqual(x, comparand))
+            {
+                operation.TurnIntoCopy(y);
+            }
+            else if (IsConstEqual(y, comparand))
+            {
+                operation.TurnIntoCopy(x);
+            }
+        }
+
+        private static void TryEliminateConditionalSelect(Operation operation)
+        {
+            Operand cond = operation.GetSource(0);
+
+            if (cond.Type != OperandType.Constant)
+            {
+                return;
+            }
+
+            // The condition is constant, we can turn it into a copy, and select
+            // the source based on the condition value.
+            int srcIndex = cond.Value != 0 ? 1 : 2;
+
+            Operand source = operation.GetSource(srcIndex);
+
+            operation.TurnIntoCopy(source);
+        }
+
+        private static bool IsConstEqual(Operand operand, int comparand)
+        {
+            if (operand.Type != OperandType.Constant)
+            {
+                return false;
+            }
+
+            return operand.Value == comparand;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.Shader/Translation/Ssa.cs b/Ryujinx.Graphics.Shader/Translation/Ssa.cs
new file mode 100644
index 00000000..a4d763be
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/Translation/Ssa.cs
@@ -0,0 +1,330 @@
+using Ryujinx.Graphics.Shader.Decoders;
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+using System.Collections.Generic;
+
+using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
+
+namespace Ryujinx.Graphics.Shader.Translation
+{
+    static class Ssa
+    {
+        private const int GprsAndPredsCount = RegisterConsts.GprsCount + RegisterConsts.PredsCount;
+
+        private class DefMap
+        {
+            private Dictionary<Register, Operand> _map;
+
+            private long[] _phiMasks;
+
+            public DefMap()
+            {
+                _map = new Dictionary<Register, Operand>();
+
+                _phiMasks = new long[(RegisterConsts.TotalCount + 63) / 64];
+            }
+
+            public bool TryAddOperand(Register reg, Operand operand)
+            {
+                return _map.TryAdd(reg, operand);
+            }
+
+            public bool TryGetOperand(Register reg, out Operand operand)
+            {
+                return _map.TryGetValue(reg, out operand);
+            }
+
+            public bool AddPhi(Register reg)
+            {
+                int key = GetKeyFromRegister(reg);
+
+                int index = key / 64;
+                int bit   = key & 63;
+
+                long mask = 1L << bit;
+
+                if ((_phiMasks[index] & mask) != 0)
+                {
+                    return false;
+                }
+
+                _phiMasks[index] |= mask;
+
+                return true;
+            }
+
+            public bool HasPhi(Register reg)
+            {
+                int key = GetKeyFromRegister(reg);
+
+                int index = key / 64;
+                int bit   = key & 63;
+
+                return (_phiMasks[index] & (1L << bit)) != 0;
+            }
+        }
+
+        private struct Definition
+        {
+            public BasicBlock Block { get; }
+            public Operand    Local { get; }
+
+            public Definition(BasicBlock block, Operand local)
+            {
+                Block = block;
+                Local = local;
+            }
+        }
+
+        public static void Rename(BasicBlock[] blocks)
+        {
+            DefMap[] globalDefs = new DefMap[blocks.Length];
+
+            for (int blkIndex = 0; blkIndex < blocks.Length; blkIndex++)
+            {
+                globalDefs[blkIndex] = new DefMap();
+            }
+
+            Queue<BasicBlock> dfPhiBlocks = new Queue<BasicBlock>();
+
+            // First pass, get all defs and locals uses.
+            for (int blkIndex = 0; blkIndex < blocks.Length; blkIndex++)
+            {
+                Operand[] localDefs = new Operand[RegisterConsts.TotalCount];
+
+                Operand RenameLocal(Operand operand)
+                {
+                    if (operand != null && operand.Type == OperandType.Register)
+                    {
+                        Operand local = localDefs[GetKeyFromRegister(operand.GetRegister())];
+
+                        operand = local ?? operand;
+                    }
+
+                    return operand;
+                }
+
+                BasicBlock block = blocks[blkIndex];
+
+                LinkedListNode<INode> node = block.Operations.First;
+
+                while (node != null)
+                {
+                    if (node.Value is Operation operation)
+                    {
+                        for (int index = 0; index < operation.SourcesCount; index++)
+                        {
+                            operation.SetSource(index, RenameLocal(operation.GetSource(index)));
+                        }
+
+                        if (operation.Dest != null && operation.Dest.Type == OperandType.Register)
+                        {
+                            Operand local = Local();
+
+                            localDefs[GetKeyFromRegister(operation.Dest.GetRegister())] = local;
+
+                            operation.Dest = local;
+                        }
+                    }
+
+                    node = node.Next;
+                }
+
+                for (int index = 0; index < RegisterConsts.TotalCount; index++)
+                {
+                    Operand local = localDefs[index];
+
+                    if (local == null)
+                    {
+                        continue;
+                    }
+
+                    Register reg = GetRegisterFromKey(index);
+
+                    globalDefs[block.Index].TryAddOperand(reg, local);
+
+                    dfPhiBlocks.Enqueue(block);
+
+                    while (dfPhiBlocks.TryDequeue(out BasicBlock dfPhiBlock))
+                    {
+                        foreach (BasicBlock domFrontier in dfPhiBlock.DominanceFrontiers)
+                        {
+                            if (globalDefs[domFrontier.Index].AddPhi(reg))
+                            {
+                                dfPhiBlocks.Enqueue(domFrontier);
+                            }
+                        }
+                    }
+                }
+            }
+
+            // Second pass, rename variables with definitions on different blocks.
+            for (int blkIndex = 0; blkIndex < blocks.Length; blkIndex++)
+            {
+                Operand[] localDefs = new Operand[RegisterConsts.TotalCount];
+
+                BasicBlock block = blocks[blkIndex];
+
+                Operand RenameGlobal(Operand operand)
+                {
+                    if (operand != null && operand.Type == OperandType.Register)
+                    {
+                        int key = GetKeyFromRegister(operand.GetRegister());
+
+                        Operand local = localDefs[key];
+
+                        if (local != null)
+                        {
+                            return local;
+                        }
+
+                        operand = FindDefinitionForCurr(globalDefs, block, operand.GetRegister());
+
+                        localDefs[key] = operand;
+                    }
+
+                    return operand;
+                }
+
+                LinkedListNode<INode> node = block.Operations.First;
+
+                while (node != null)
+                {
+                    if (node.Value is Operation operation)
+                    {
+                        for (int index = 0; index < operation.SourcesCount; index++)
+                        {
+                            operation.SetSource(index, RenameGlobal(operation.GetSource(index)));
+                        }
+                    }
+
+                    node = node.Next;
+                }
+            }
+        }
+
+        private static Operand FindDefinitionForCurr(DefMap[] globalDefs, BasicBlock current, Register reg)
+        {
+            if (globalDefs[current.Index].HasPhi(reg))
+            {
+                return InsertPhi(globalDefs, current, reg);
+            }
+
+            if (current != current.ImmediateDominator)
+            {
+                return FindDefinition(globalDefs, current.ImmediateDominator, reg).Local;
+            }
+
+            return Undef();
+        }
+
+        private static Definition FindDefinition(DefMap[] globalDefs, BasicBlock current, Register reg)
+        {
+            foreach (BasicBlock block in SelfAndImmediateDominators(current))
+            {
+                DefMap defMap = globalDefs[block.Index];
+
+                if (defMap.TryGetOperand(reg, out Operand lastDef))
+                {
+                    return new Definition(block, lastDef);
+                }
+
+                if (defMap.HasPhi(reg))
+                {
+                    return new Definition(block, InsertPhi(globalDefs, block, reg));
+                }
+            }
+
+            return new Definition(current, Undef());
+        }
+
+        private static IEnumerable<BasicBlock> SelfAndImmediateDominators(BasicBlock block)
+        {
+            while (block != block.ImmediateDominator)
+            {
+                yield return block;
+
+                block = block.ImmediateDominator;
+            }
+
+            yield return block;
+        }
+
+        private static Operand InsertPhi(DefMap[] globalDefs, BasicBlock block, Register reg)
+        {
+            // This block has a Phi that has not been materialized yet, but that
+            // would define a new version of the variable we're looking for. We need
+            // to materialize the Phi, add all the block/operand pairs into the Phi, and
+            // then use the definition from that Phi.
+            Operand local = Local();
+
+            PhiNode phi = new PhiNode(local);
+
+            AddPhi(block, phi);
+
+            globalDefs[block.Index].TryAddOperand(reg, local);
+
+            foreach (BasicBlock predecessor in block.Predecessors)
+            {
+                Definition def = FindDefinition(globalDefs, predecessor, reg);
+
+                phi.AddSource(def.Block, def.Local);
+            }
+
+            return local;
+        }
+
+        private static void AddPhi(BasicBlock block, PhiNode phi)
+        {
+            LinkedListNode<INode> node = block.Operations.First;
+
+            if (node != null)
+            {
+                while (node.Next?.Value is PhiNode)
+                {
+                    node = node.Next;
+                }
+            }
+
+            if (node?.Value is PhiNode)
+            {
+                block.Operations.AddAfter(node, phi);
+            }
+            else
+            {
+                block.Operations.AddFirst(phi);
+            }
+        }
+
+        private static int GetKeyFromRegister(Register reg)
+        {
+            if (reg.Type == RegisterType.Gpr)
+            {
+                return reg.Index;
+            }
+            else if (reg.Type == RegisterType.Predicate)
+            {
+                return RegisterConsts.GprsCount + reg.Index;
+            }
+            else /* if (reg.Type == RegisterType.Flag) */
+            {
+                return GprsAndPredsCount + reg.Index;
+            }
+        }
+
+        private static Register GetRegisterFromKey(int key)
+        {
+            if (key < RegisterConsts.GprsCount)
+            {
+                return new Register(key, RegisterType.Gpr);
+            }
+            else if (key < GprsAndPredsCount)
+            {
+                return new Register(key - RegisterConsts.GprsCount, RegisterType.Predicate);
+            }
+            else /* if (key < RegisterConsts.TotalCount) */
+            {
+                return new Register(key - GprsAndPredsCount, RegisterType.Flag);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.Shader/Translation/TranslationConfig.cs b/Ryujinx.Graphics.Shader/Translation/TranslationConfig.cs
new file mode 100644
index 00000000..e5fa6d14
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/Translation/TranslationConfig.cs
@@ -0,0 +1,25 @@
+using System;
+
+namespace Ryujinx.Graphics.Shader.Translation
+{
+    public struct TranslationConfig
+    {
+        public int MaxCBufferSize { get; }
+
+        public int Version { get; }
+
+        public TranslationFlags Flags { get; }
+
+        public TranslationConfig(int maxCBufferSize, int version, TranslationFlags flags)
+        {
+            if (maxCBufferSize <= 0)
+            {
+                throw new ArgumentOutOfRangeException(nameof(maxCBufferSize));
+            }
+
+            MaxCBufferSize = maxCBufferSize;
+            Version        = version;
+            Flags          = flags;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.Shader/Translation/TranslationFlags.cs b/Ryujinx.Graphics.Shader/Translation/TranslationFlags.cs
new file mode 100644
index 00000000..99b6107a
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/Translation/TranslationFlags.cs
@@ -0,0 +1,11 @@
+namespace Ryujinx.Graphics.Shader.Translation
+{
+    public enum TranslationFlags
+    {
+        None = 0,
+
+        Compute       = 1 << 0,
+        DebugMode     = 1 << 1,
+        Unspecialized = 1 << 2
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.Shader/Translation/Translator.cs b/Ryujinx.Graphics.Shader/Translation/Translator.cs
new file mode 100644
index 00000000..4838b1e2
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/Translation/Translator.cs
@@ -0,0 +1,300 @@
+using Ryujinx.Graphics.Shader.CodeGen.Glsl;
+using Ryujinx.Graphics.Shader.Decoders;
+using Ryujinx.Graphics.Shader.Instructions;
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+using Ryujinx.Graphics.Shader.StructuredIr;
+using Ryujinx.Graphics.Shader.Translation.Optimizations;
+using System;
+using System.Collections.Generic;
+
+using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
+
+namespace Ryujinx.Graphics.Shader.Translation
+{
+    public static class Translator
+    {
+        private const int HeaderSize = 0x50;
+
+        public static ShaderProgram Translate(Span<byte> code, TranslationConfig translationConfig)
+        {
+            return Translate(code, Span<byte>.Empty, translationConfig);
+        }
+
+        public static ShaderProgram Translate(Span<byte> code, Span<byte> code2, TranslationConfig translationConfig)
+        {
+            bool compute   = (translationConfig.Flags & TranslationFlags.Compute)   != 0;
+            bool debugMode = (translationConfig.Flags & TranslationFlags.DebugMode) != 0;
+
+            Operation[] shaderOps = DecodeShader(code, compute, debugMode, out ShaderHeader header);
+
+            if (code2 != Span<byte>.Empty)
+            {
+                // Dual vertex shader.
+                Operation[] shaderOpsB = DecodeShader(code2, compute, debugMode, out header);
+
+                shaderOps = Combine(shaderOps, shaderOpsB);
+            }
+
+            ShaderStage stage;
+
+            if (compute)
+            {
+                stage = ShaderStage.Compute;
+            }
+            else
+            {
+                stage = header.Stage;
+            }
+
+            int maxOutputVertexCount = 0;
+
+            OutputTopology outputTopology = OutputTopology.LineStrip;
+
+            if (!compute)
+            {
+                maxOutputVertexCount = header.MaxOutputVertexCount;
+                outputTopology       = header.OutputTopology;
+            }
+
+            ShaderConfig config = new ShaderConfig(
+                stage,
+                translationConfig.Flags,
+                translationConfig.MaxCBufferSize,
+                maxOutputVertexCount,
+                outputTopology);
+
+            BasicBlock[] irBlocks = ControlFlowGraph.MakeCfg(shaderOps);
+
+            Dominance.FindDominators(irBlocks[0], irBlocks.Length);
+
+            Dominance.FindDominanceFrontiers(irBlocks);
+
+            Ssa.Rename(irBlocks);
+
+            Optimizer.Optimize(irBlocks, stage);
+
+            StructuredProgramInfo sInfo = StructuredProgram.MakeStructuredProgram(irBlocks, config);
+
+            GlslProgram program = GlslGenerator.Generate(sInfo, config);
+
+            ShaderProgramInfo spInfo = new ShaderProgramInfo(
+                program.CBufferDescriptors,
+                program.SBufferDescriptors,
+                program.TextureDescriptors,
+                sInfo.InterpolationQualifiers,
+                sInfo.UsesInstanceId);
+
+            string glslCode = program.Code;
+
+            if (translationConfig.Version != 0)
+            {
+                glslCode = "// " + translationConfig.Version + Environment.NewLine + glslCode;
+            }
+
+            return new ShaderProgram(spInfo, stage, glslCode);
+        }
+
+        private static Operation[] DecodeShader(Span<byte> code, bool compute, bool debugMode, out ShaderHeader header)
+        {
+            Block[] cfg;
+
+            EmitterContext context;
+
+            ulong headerSize;
+
+            if (compute)
+            {
+                header = null;
+
+                cfg = Decoder.Decode(code, 0);
+
+                context = new EmitterContext(ShaderStage.Compute, header);
+
+                headerSize = 0;
+            }
+            else
+            {
+                header = new ShaderHeader(code);
+
+                cfg = Decoder.Decode(code, HeaderSize);
+
+                context = new EmitterContext(header.Stage, header);
+
+                headerSize = HeaderSize;
+            }
+
+            for (int blkIndex = 0; blkIndex < cfg.Length; blkIndex++)
+            {
+                Block block = cfg[blkIndex];
+
+                context.CurrBlock = block;
+
+                context.MarkLabel(context.GetLabel(block.Address));
+
+                for (int opIndex = 0; opIndex < block.OpCodes.Count; opIndex++)
+                {
+                    OpCode op = block.OpCodes[opIndex];
+
+                    if (debugMode)
+                    {
+                        string instName;
+
+                        if (op.Emitter != null)
+                        {
+                            instName = op.Emitter.Method.Name;
+                        }
+                        else
+                        {
+                            instName = "???";
+                        }
+
+                        string dbgComment = $"0x{(op.Address - headerSize):X6}: 0x{op.RawOpCode:X16} {instName}";
+
+                        context.Add(new CommentNode(dbgComment));
+                    }
+
+                    if (op.NeverExecute)
+                    {
+                        continue;
+                    }
+
+                    Operand predSkipLbl = null;
+
+                    bool skipPredicateCheck = op.Emitter == InstEmit.Bra;
+
+                    if (op is OpCodeSync opSync)
+                    {
+                        // If the instruction is a SYNC instruction with only one
+                        // possible target address, then the instruction is basically
+                        // just a simple branch, we can generate code similar to branch
+                        // instructions, with the condition check on the branch itself.
+                        skipPredicateCheck |= opSync.Targets.Count < 2;
+                    }
+
+                    if (!(op.Predicate.IsPT || skipPredicateCheck))
+                    {
+                        Operand label;
+
+                        if (opIndex == block.OpCodes.Count - 1 && block.Next != null)
+                        {
+                            label = context.GetLabel(block.Next.Address);
+                        }
+                        else
+                        {
+                            label = Label();
+
+                            predSkipLbl = label;
+                        }
+
+                        Operand pred = Register(op.Predicate);
+
+                        if (op.InvertPredicate)
+                        {
+                            context.BranchIfTrue(label, pred);
+                        }
+                        else
+                        {
+                            context.BranchIfFalse(label, pred);
+                        }
+                    }
+
+                    context.CurrOp = op;
+
+                    if (op.Emitter != null)
+                    {
+                        op.Emitter(context);
+                    }
+
+                    if (predSkipLbl != null)
+                    {
+                        context.MarkLabel(predSkipLbl);
+                    }
+                }
+            }
+
+            return context.GetOperations();
+        }
+
+        private static Operation[] Combine(Operation[] a, Operation[] b)
+        {
+            // Here we combine two shaders.
+            // For shader A:
+            // - All user attribute stores on shader A are turned into copies to a
+            // temporary variable. It's assumed that shader B will consume them.
+            // - All return instructions are turned into branch instructions, the
+            // branch target being the start of the shader B code.
+            // For shader B:
+            // - All user attribute loads on shader B are turned into copies from a
+            // temporary variable, as long that attribute is written by shader A.
+            List<Operation> output = new List<Operation>(a.Length + b.Length);
+
+            Operand[] temps = new Operand[AttributeConsts.UserAttributesCount * 4];
+
+            Operand lblB = Label();
+
+            for (int index = 0; index < a.Length; index++)
+            {
+                Operation operation = a[index];
+
+                if (IsUserAttribute(operation.Dest))
+                {
+                    int tIndex = (operation.Dest.Value - AttributeConsts.UserAttributeBase) / 4;
+
+                    Operand temp = temps[tIndex];
+
+                    if (temp == null)
+                    {
+                        temp = Local();
+
+                        temps[tIndex] = temp;
+                    }
+
+                    operation.Dest = temp;
+                }
+
+                if (operation.Inst == Instruction.Return)
+                {
+                    output.Add(new Operation(Instruction.Branch, lblB));
+                }
+                else
+                {
+                    output.Add(operation);
+                }
+            }
+
+            output.Add(new Operation(Instruction.MarkLabel, lblB));
+
+            for (int index = 0; index < b.Length; index++)
+            {
+                Operation operation = b[index];
+
+                for (int srcIndex = 0; srcIndex < operation.SourcesCount; srcIndex++)
+                {
+                    Operand src = operation.GetSource(srcIndex);
+
+                    if (IsUserAttribute(src))
+                    {
+                        Operand temp = temps[(src.Value - AttributeConsts.UserAttributeBase) / 4];
+
+                        if (temp != null)
+                        {
+                            operation.SetSource(srcIndex, temp);
+                        }
+                    }
+                }
+
+                output.Add(operation);
+            }
+
+            return output.ToArray();
+        }
+
+        private static bool IsUserAttribute(Operand operand)
+        {
+            return operand != null &&
+                   operand.Type == OperandType.Attribute &&
+                   operand.Value >= AttributeConsts.UserAttributeBase &&
+                   operand.Value <  AttributeConsts.UserAttributeEnd;
+        }
+    }
+}
\ No newline at end of file