llvm-project

47efff77 - [SystemZ] Emit optional argument area length field (#169679)

[SystemZ] Emit optional argument area length field (#169679) The Language Environment (LE) reserves 128 byte for the argument area when the optional field is not present. If the argument area is larger, then the field must be present to guarantee that the space is reserved on stack extension. Creating this field when alloca() is used may reduce the needed stack space in case alloca() causes a stack extension.