diff --git a/src/tint/CMakeLists.txt b/src/tint/CMakeLists.txt
index f26c138..2521260 100644
--- a/src/tint/CMakeLists.txt
+++ b/src/tint/CMakeLists.txt
@@ -666,6 +666,8 @@
     ir/loop.h
     ir/module.cc
     ir/module.h
+    ir/register.cc
+    ir/register.h
     ir/switch.cc
     ir/switch.h
     ir/terminator.cc
@@ -1330,6 +1332,7 @@
   if (${TINT_BUILD_IR})
     list(APPEND TINT_TEST_SRCS
       ir/builder_impl_test.cc
+      ir/register_test.cc
       ir/test_helper.h
     )
   endif()
diff --git a/src/tint/ir/register.cc b/src/tint/ir/register.cc
new file mode 100644
index 0000000..815cb02
--- /dev/null
+++ b/src/tint/ir/register.cc
@@ -0,0 +1,64 @@
+// Copyright 2022 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "src/tint/ir/register.h"
+
+namespace tint::ir {
+
+Register::Register(Id id) : kind_(Kind::kTemp), data_(id) {}
+
+Register::Register(f32 f) : kind_(Kind::kF32), data_(f) {}
+
+Register::Register(f16 f) : kind_(Kind::kF16), data_(f) {}
+
+Register::Register(u32 u) : kind_(Kind::kU32), data_(u) {}
+
+Register::Register(i32 i) : kind_(Kind::kI32), data_(i) {}
+
+Register::Register(bool b) : kind_(Kind::kBool), data_(b) {}
+
+Register::Register(Symbol s, Id id) : kind_(Kind::kVar), data_(VarData{s, id}) {}
+
+Register::~Register() = default;
+
+Register::Register(const Register& o) = default;
+
+Register::Register(Register&& o) = default;
+
+Register& Register::operator=(const Register& o) = default;
+
+Register& Register::operator=(Register&& o) = default;
+
+std::string Register::AsString() const {
+    switch (kind_) {
+        case Kind::kTemp:
+            return "%" + std::to_string(AsId());
+        case Kind::kF32:
+            return std::to_string(AsF32().value);
+        case Kind::kF16:
+            return std::to_string(AsF16().value);
+        case Kind::kI32:
+            return std::to_string(AsI32().value);
+        case Kind::kU32:
+            return std::to_string(AsU32().value);
+        // TODO(dsinclair): Emit the symbol instead of v
+        case Kind::kVar:
+            return "%v" + std::to_string(AsVarData().id);
+        case Kind::kBool:
+            return AsBool() ? "true" : "false";
+    }
+    return "unknown register";
+}
+
+}  // namespace tint::ir
diff --git a/src/tint/ir/register.h b/src/tint/ir/register.h
new file mode 100644
index 0000000..dd56aa9
--- /dev/null
+++ b/src/tint/ir/register.h
@@ -0,0 +1,161 @@
+// Copyright 2022 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef SRC_TINT_IR_REGISTER_H_
+#define SRC_TINT_IR_REGISTER_H_
+
+#include <string>
+#include <variant>
+
+#include "src/tint/number.h"
+#include "src/tint/symbol.h"
+
+namespace tint::ir {
+
+/// Register in the IR. The register can be one of several types these include, but aren't limited
+/// to, `f32`, `u32`, `temp`, `var`. The type of the register determines the type of data stored
+/// in the register.
+class Register {
+  public:
+    /// A register id.
+    using Id = uint32_t;
+
+    /// Stores data for a given variable. There will be multiple `VarData` entries for a given `id`.
+    /// The `id` acts like a generation number (although they aren't sequential, they are
+    /// increasing). As the variable is stored too a new register will be created and the the `id`
+    /// will be incremented.
+    struct VarData {
+        /// The symbol for the variable
+        Symbol sym;
+        /// The id for the variable.
+        Id id;
+        // TODO(dsinclair): Should var type data be stored here along side the variable info?
+    };
+
+    /// Constructor
+    /// @param id the id for the register
+    explicit Register(Id id);
+
+    /// Constructor
+    /// @param s the symbol for the register
+    /// @param id the id for the register
+    Register(Symbol s, Id id);
+
+    /// Constructor
+    /// @param b the `bool` value to store in the register
+    explicit Register(bool b);
+
+    /// Constructor
+    /// @param f the `f32` value to store in the register
+    explicit Register(f32 f);
+
+    /// Constructor
+    /// @param f the `f16` value to store in the register
+    explicit Register(f16 f);
+
+    /// Constructor
+    /// @param u the `u32` value to store in the register
+    explicit Register(u32 u);
+
+    /// Constructor
+    /// @param i the `i32` value to store in the register
+    explicit Register(i32 i);
+
+    /// Destructor
+    ~Register();
+
+    /// Copy constructor
+    /// @param o the register to copy from
+    Register(const Register& o);
+    /// Move constructor
+    /// @param o the register to move from
+    Register(Register&& o);
+
+    /// Copy assign
+    /// @param o the register to copy from
+    /// @returns this
+    Register& operator=(const Register& o);
+    /// Move assign
+    /// @param o the register to move from
+    /// @returns this
+    Register& operator=(Register&& o);
+
+    /// @returns true if this is a temporary register
+    bool IsTemp() const { return kind_ == Kind::kTemp; }
+    /// @returns true if this is a f32 register
+    bool IsF32() const { return kind_ == Kind::kF32; }
+    /// @returns true if this is a f16 register
+    bool IsF16() const { return kind_ == Kind::kF16; }
+    /// @returns true if this is an i32 register
+    bool IsI32() const { return kind_ == Kind::kI32; }
+    /// @returns true if this is a u32 register
+    bool IsU32() const { return kind_ == Kind::kU32; }
+    /// @returns true if this is a var register
+    bool IsVar() const { return kind_ == Kind::kVar; }
+    /// @returns true if this is a bool register
+    bool IsBool() const { return kind_ == Kind::kBool; }
+
+    /// @returns the register data as a `f32`.
+    /// @note, must only be called if `IsF32()` is true
+    f32 AsF32() const { return std::get<f32>(data_); }
+    /// @returns the register data as a `f16`.
+    /// @note, must only be called if `IsF16()` is true
+    f16 AsF16() const { return std::get<f16>(data_); }
+    /// @returns the register data as an `i32`.
+    /// @note, must only be called if `IsI32()` is true
+    i32 AsI32() const { return std::get<i32>(data_); }
+    /// @returns the register data as a `u32`.
+    /// @note, must only be called if `IsU32()` is true
+    u32 AsU32() const { return std::get<u32>(data_); }
+    /// @returns the register data as an `Id`.
+    /// @note, must only be called if `IsTemp()` is true
+    Id AsId() const { return std::get<Id>(data_); }
+    /// @returns the register data as a `VarData` structure.
+    /// @note, must only be called if `IsVar()` is true
+    VarData AsVarData() const { return std::get<VarData>(data_); }
+    /// @returns the register data as a `bool`.
+    /// @note, must only be called if `IsBool()` is true
+    bool AsBool() const { return std::get<bool>(data_); }
+
+    /// @returns the string representation of the register
+    std::string AsString() const;
+
+  private:
+    /// The type of the register
+    enum class Kind {
+        /// A temporary allocated register
+        kTemp,
+        /// A f32 register
+        kF32,
+        /// A f16 register
+        kF16,
+        /// An i32 register
+        kI32,
+        /// A u32 register
+        kU32,
+        /// A variable register
+        kVar,
+        /// A boolean register
+        kBool,
+    };
+
+    /// The type of data stored in this register
+    Kind kind_;
+    /// The data stored in the register
+    std::variant<Id, f32, f16, u32, i32, VarData, bool> data_;
+};
+
+}  // namespace tint::ir
+
+#endif  // SRC_TINT_IR_REGISTER_H_
diff --git a/src/tint/ir/register_test.cc b/src/tint/ir/register_test.cc
new file mode 100644
index 0000000..a19a773
--- /dev/null
+++ b/src/tint/ir/register_test.cc
@@ -0,0 +1,136 @@
+// Copyright 2022 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "src/tint/ir/test_helper.h"
+
+#include "src/tint/ir/register.h"
+
+namespace tint::ir {
+namespace {
+
+using namespace tint::number_suffixes;  // NOLINT
+
+using IR_RegisterTest = TestHelper;
+
+TEST_F(IR_RegisterTest, f32) {
+    Register r(1.2_f);
+    EXPECT_EQ(1.2_f, r.AsF32());
+    EXPECT_EQ("1.200000", r.AsString());
+
+    EXPECT_TRUE(r.IsF32());
+    EXPECT_FALSE(r.IsF16());
+    EXPECT_FALSE(r.IsI32());
+    EXPECT_FALSE(r.IsU32());
+    EXPECT_FALSE(r.IsTemp());
+    EXPECT_FALSE(r.IsVar());
+    EXPECT_FALSE(r.IsBool());
+}
+
+TEST_F(IR_RegisterTest, f16) {
+    Register r(1.1_h);
+    EXPECT_EQ(1.1_h, r.AsF16());
+    EXPECT_EQ("1.099609", r.AsString());
+
+    EXPECT_FALSE(r.IsF32());
+    EXPECT_TRUE(r.IsF16());
+    EXPECT_FALSE(r.IsI32());
+    EXPECT_FALSE(r.IsU32());
+    EXPECT_FALSE(r.IsTemp());
+    EXPECT_FALSE(r.IsVar());
+    EXPECT_FALSE(r.IsBool());
+}
+
+TEST_F(IR_RegisterTest, i32) {
+    Register r(1_i);
+    EXPECT_EQ(1_i, r.AsI32());
+    EXPECT_EQ("1", r.AsString());
+
+    EXPECT_FALSE(r.IsF32());
+    EXPECT_FALSE(r.IsF16());
+    EXPECT_TRUE(r.IsI32());
+    EXPECT_FALSE(r.IsU32());
+    EXPECT_FALSE(r.IsTemp());
+    EXPECT_FALSE(r.IsVar());
+    EXPECT_FALSE(r.IsBool());
+}
+
+TEST_F(IR_RegisterTest, u32) {
+    Register r(2_u);
+    EXPECT_EQ(2_u, r.AsU32());
+    EXPECT_EQ("2", r.AsString());
+
+    EXPECT_FALSE(r.IsF32());
+    EXPECT_FALSE(r.IsF16());
+    EXPECT_FALSE(r.IsI32());
+    EXPECT_TRUE(r.IsU32());
+    EXPECT_FALSE(r.IsTemp());
+    EXPECT_FALSE(r.IsVar());
+    EXPECT_FALSE(r.IsBool());
+}
+
+TEST_F(IR_RegisterTest, id) {
+    Register r(Register::Id(4));
+    EXPECT_EQ(4u, r.AsId());
+    EXPECT_EQ("%4", r.AsString());
+
+    EXPECT_FALSE(r.IsF32());
+    EXPECT_FALSE(r.IsF16());
+    EXPECT_FALSE(r.IsI32());
+    EXPECT_FALSE(r.IsU32());
+    EXPECT_TRUE(r.IsTemp());
+    EXPECT_FALSE(r.IsVar());
+    EXPECT_FALSE(r.IsBool());
+}
+
+TEST_F(IR_RegisterTest, bool) {
+    Register r(false);
+    EXPECT_FALSE(r.AsBool());
+    EXPECT_EQ("false", r.AsString());
+
+    r = Register(true);
+    EXPECT_TRUE(r.AsBool());
+    EXPECT_EQ("true", r.AsString());
+
+    EXPECT_FALSE(r.IsF32());
+    EXPECT_FALSE(r.IsF16());
+    EXPECT_FALSE(r.IsI32());
+    EXPECT_FALSE(r.IsU32());
+    EXPECT_FALSE(r.IsTemp());
+    EXPECT_FALSE(r.IsVar());
+    EXPECT_TRUE(r.IsBool());
+}
+
+TEST_F(IR_RegisterTest, var) {
+    Symbol s;
+    Register r(s, 2);
+    EXPECT_EQ(2u, r.AsVarData().id);
+    EXPECT_EQ(s, r.AsVarData().sym);
+    EXPECT_EQ("%v2", r.AsString());
+
+    r = Register(s, 4);
+    EXPECT_EQ(4u, r.AsVarData().id);
+    EXPECT_EQ(s, r.AsVarData().sym);
+    EXPECT_EQ("%v4", r.AsString());
+
+    EXPECT_FALSE(r.IsF32());
+    EXPECT_FALSE(r.IsF16());
+    EXPECT_FALSE(r.IsI32());
+    EXPECT_FALSE(r.IsU32());
+    EXPECT_FALSE(r.IsTemp());
+    EXPECT_TRUE(r.IsVar());
+    EXPECT_FALSE(r.IsBool());
+}
+
+}  // namespace
+}  // namespace tint::ir