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diff --git a/src/video_core/shader/expr.h b/src/video_core/shader/expr.h
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+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <variant>
+
+#include "video_core/engines/shader_bytecode.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::ConditionCode;
+using Tegra::Shader::Pred;
+
+class ExprAnd;
+class ExprOr;
+class ExprNot;
+class ExprPredicate;
+class ExprCondCode;
+class ExprVar;
+class ExprBoolean;
+
+using ExprData =
+ std::variant<ExprVar, ExprCondCode, ExprPredicate, ExprNot, ExprOr, ExprAnd, ExprBoolean>;
+using Expr = std::shared_ptr<ExprData>;
+
+class ExprAnd final {
+public:
+ explicit ExprAnd(Expr a, Expr b) : operand1{a}, operand2{b} {}
+
+ bool operator==(const ExprAnd& b) const;
+
+ Expr operand1;
+ Expr operand2;
+};
+
+class ExprOr final {
+public:
+ explicit ExprOr(Expr a, Expr b) : operand1{a}, operand2{b} {}
+
+ bool operator==(const ExprOr& b) const;
+
+ Expr operand1;
+ Expr operand2;
+};
+
+class ExprNot final {
+public:
+ explicit ExprNot(Expr a) : operand1{a} {}
+
+ bool operator==(const ExprNot& b) const;
+
+ Expr operand1;
+};
+
+class ExprVar final {
+public:
+ explicit ExprVar(u32 index) : var_index{index} {}
+
+ bool operator==(const ExprVar& b) const {
+ return var_index == b.var_index;
+ }
+
+ u32 var_index;
+};
+
+class ExprPredicate final {
+public:
+ explicit ExprPredicate(u32 predicate) : predicate{predicate} {}
+
+ bool operator==(const ExprPredicate& b) const {
+ return predicate == b.predicate;
+ }
+
+ u32 predicate;
+};
+
+class ExprCondCode final {
+public:
+ explicit ExprCondCode(ConditionCode cc) : cc{cc} {}
+
+ bool operator==(const ExprCondCode& b) const {
+ return cc == b.cc;
+ }
+
+ ConditionCode cc;
+};
+
+class ExprBoolean final {
+public:
+ explicit ExprBoolean(bool val) : value{val} {}
+
+ bool operator==(const ExprBoolean& b) const {
+ return value == b.value;
+ }
+
+ bool value;
+};
+
+template <typename T, typename... Args>
+Expr MakeExpr(Args&&... args) {
+ static_assert(std::is_convertible_v<T, ExprData>);
+ return std::make_shared<ExprData>(T(std::forward<Args>(args)...));
+}
+
+bool ExprAreEqual(Expr first, Expr second);
+
+bool ExprAreOpposite(Expr first, Expr second);
+
+Expr MakeExprNot(Expr first);
+
+Expr MakeExprAnd(Expr first, Expr second);
+
+Expr MakeExprOr(Expr first, Expr second);
+
+bool ExprIsTrue(Expr first);
+
+} // namespace VideoCommon::Shader