Initial work

Ryujinx.Graphics/Shader/Translation/Optimizations/BranchElimination.cs

@@ -1,64 +0,0 @@
-using Ryujinx.Graphics.Shader.IntermediateRepresentation;
-using System;
-
-namespace Ryujinx.Graphics.Shader.Translation.Optimizations
-{
-    static class BranchElimination
-    {
-        public static bool Eliminate(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;
-        }
-    }
-}