shader: Initial recompiler work

src/shader_recompiler/ir_opt/passes.h

@@ -0,0 +1,16 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "shader_recompiler/frontend/ir/basic_block.h"
+
+namespace Shader::Optimization {
+
+void DeadCodeEliminationPass(IR::Block& block);
+void GetSetElimination(IR::Block& block);
+void IdentityRemovalPass(IR::Block& block);
+void VerificationPass(const IR::Block& block);
+
+} // namespace Shader::Optimization