Extract Local Variable

A register or the stack is used to hold the value of a local variable.
Define a new local variable with the appropriate type, and change all local references to that stack location or register into a reference to that variable.

void loc100() {
        ...
        eax = ...;
        ...
        ...
        ... = eax;
        ...
}

⇓

void loc100() {
        int var1;
        ...
        var1 = ...;
        ...
        ...
        ... = var1;
        ...
}

Motivation

During compilation, local variables are mapped into registers or stack positions. This transformation must be reversed in order to improve code understanding.

Mechanics

Declare a new variable in the function scope.
Replace all references to the specified register or stack position by a reference to the newly created variable.