sstore and push in IR-base codegen cause bytes variable difference

[Subway2023]

Description

After assigning and pushing to a bytes variable, the results of this variable differ between the code generated by legacy codegen and IR-based codegen.

Environment

• Compiler version: 0.8.26
• Target EVM version (as per compiler settings): None
• Framework/IDE (e.g. Truffle or Remix): Remix
• EVM execution environment / backend / blockchain client: None
• Operating system: None

Steps to Reproduce

contract D {
    bytes otherData;
    function fromMemoryAndStorage() public{
        assembly { sstore(otherData.slot, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00) }
        otherData.push();
    }
}

Legacy Codegen

storage:

0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff02

IR-based Codegen

storage:

0xff00000000000000000000000000000000000000000000000000000000000002

The IR-based codegen incorrectly cleared the value in the bytes variable.