package goblint-cil

Invoked for each variable declaration. The subtrees to be traversed * are those corresponding to the type and attributes of the variable. * Note that variable declarations are all the GVar, GVarDecl, GFun, * all the varinfo in formals of function types, and the formals and * locals for function definitions. This means that the list of formals * in a function definition will be traversed twice, once as part of the * function type and second as part of the formals in a function * definition.

Invoked on each variable use. Here only the SkipChildren and * ChangeTo actions make sense since there are no subtrees. Note that * the type and attributes of the variable are not traversed for a * variable use

Invoked on each expression occurrence. The subtrees are the * subexpressions, the types (for a Cast or SizeOf expression) or the * variable use.

Invoked on each lvalue occurrence

Invoked on each offset occurrence that is *not* as part * of an initializer list specification, i.e. in an lval or * recursively inside an offset.

Invoked on each offset appearing in the list of a * CompoundInit initializer.

Invoked on each instruction occurrence. The ChangeTo action can * replace this instruction with a list of instructions

Control-flow statement. The default DoChildren action does not * create a new statement when the components change. Instead it updates * the contents of the original statement. This is done to preserve the * sharing with Goto and Case statements that point to the original * statement. If you use the ChangeTo action then you should take care * of preserving that sharing yourself.

Block.

Function definition. Replaced in place.

Global (vars, types, etc.)

Initializers for static, * const and global variables, * pass the variable where this * occurs, and the offset

Use of some type. Note * that for structure/union * and enumeration types the * definition of the * composite type is not * visited. Use vglob to * visit it.

Attribute. Each attribute can be replaced by a list

Attribute parameters.

Add here instructions while visiting to queue them to precede the * current statement or instruction being processed. Use this method only * when you are visiting an expression that is inside a function body, or * a statement, because otherwise there will no place for the visitor to * place your instructions.

Gets the queue of instructions and resets the queue. This is done * automatically for you when you visit statements.