# Return

***

### STOP <a href="#stop" id="stop"></a>

Original [EVM](https://www.evm.codes/#00?fork=shanghai) instruction.

This instruction is a [RETURN](https://docs.zksync.io/zk-stack/components/compiler/specification/instructions/evm/return#return) with an empty data payload.

#### LLVM IR <a href="#llvm-ir" id="llvm-ir"></a>

The same as for [RETURN](https://docs.zksync.io/zk-stack/components/compiler/specification/instructions/evm/return#return).

[The LLVM IR generator code](https://github.com/matter-labs/era-compiler-llvm-context/blob/main/src/eravm/evm/return.rs#L103) is common for Yul and EVMLA representations.

### RETURN <a href="#return" id="return"></a>

Original [EVM](https://www.evm.codes/#f3?fork=shanghai) instruction.

This instruction works differently in deploy code. For more information, see [the ZKsync Era documentation](https://docs.zksync.io/build/developer-reference/ethereum-differences/evm-instructions#return-stop).

#### LLVM IR <a href="#llvm-ir-1" id="llvm-ir-1"></a>

```llvm
define void @__return(i256 %0, i256 %1, i256 %2) "noinline-oz" #5 personality i32()* @__personality {
entry:
  %abi = call i256@__aux_pack_abi(i256 %0, i256 %1, i256 %2)
  tail call void @llvm.syncvm.return(i256 %abi)
  unreachable
}
```

[The LLVM IR generator code](https://github.com/matter-labs/era-compiler-llvm-context/blob/main/src/eravm/evm/return.rs#L16) is common for Yul and EVMLA representations.

### REVERT <a href="#revert" id="revert"></a>

Original [EVM](https://www.evm.codes/#fd?fork=shanghai) instruction.

#### LLVM IR <a href="#llvm-ir-2" id="llvm-ir-2"></a>

```llvm
define void @__revert(i256 %0, i256 %1, i256 %2) "noinline-oz" #5 personality i32()* @__personality {
entry:
  %abi = call i256@__aux_pack_abi(i256 %0, i256 %1, i256 %2)
  tail call void @llvm.syncvm.revert(i256 %abi)
  unreachable
}
```

[The LLVM IR generator code](https://github.com/matter-labs/era-compiler-llvm-context/blob/main/src/eravm/evm/return.rs#L86) is common for Yul and EVMLA representations.

#### EraVM <a href="#eravm" id="eravm"></a>

See also EraVM instruction `revert`: [when returning from near calls](https://matter-labs.github.io/eravm-spec/spec.html#NearRevertDefinition) and [when returning from far calls](https://matter-labs.github.io/eravm-spec/spec.html#FarRevertDefinition).

### INVALID <a href="#invalid" id="invalid"></a>

Original [EVM](https://www.evm.codes/#fe?fork=shanghai) instruction.

This instruction is a [REVERT](https://docs.zksync.io/zk-stack/components/compiler/specification/instructions/evm/return#revert) with an empty data payload, but it also burns all the available gas.

#### LLVM IR <a href="#llvm-ir-3" id="llvm-ir-3"></a>

The same as for [REVERT](https://docs.zksync.io/zk-stack/components/compiler/specification/instructions/evm/return#revert).

[The LLVM IR generator code](https://github.com/matter-labs/era-compiler-llvm-context/blob/main/src/eravm/evm/return.rs#L115) is common for Yul and EVMLA representations.

#### EraVM <a href="#eravm-1" id="eravm-1"></a>

See also EraVM instruction `revert`: [when returning from near calls](https://matter-labs.github.io/eravm-spec/spec.html#NearRevertDefinition) and [when returning from far calls](https://matter-labs.github.io/eravm-spec/spec.html#FarRevertDefinition).

<br>


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