Class type Flx_cil_cil.cilVisitor


class type cilVisitor = object .. end
A visitor interface for traversing CIL trees. Create instantiations of * this type by specializing the class Flx_cil_cil.nopCilVisitor. Each of the * specialized visiting functions can also call the queueInstr to specify * that some instructions should be inserted before the current instruction * or statement. Use syntax like self#queueInstr to call a method * associated with the current object.

method vvdec : varinfo -> varinfo visitAction
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.
method vvrbl : varinfo -> varinfo visitAction
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
method vexpr : exp -> exp visitAction
Invoked on each expression occurrence. The subtrees are the * subexpressions, the types (for a Cast or SizeOf expression) or the * variable use.
method vlval : lval -> lval visitAction
Invoked on each lvalue occurrence
method voffs : offset -> offset visitAction
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.
method vinitoffs : offset -> offset visitAction
Invoked on each offset appearing in the list of a * CompoundInit initializer.
method vinst : instr -> instr list visitAction
Invoked on each instruction occurrence. The ChangeTo action can * replace this instruction with a list of instructions
method vstmt : stmt -> stmt visitAction
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.
method vblock : block -> block visitAction
Block.
method vfunc : fundec -> fundec visitAction
Function definition. Replaced in place.
method vglob : global -> global list visitAction
Global (vars, types, etc.)
method vinit : init -> init visitAction
Initializers for globals
method vtype : typ -> typ visitAction
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.
method vattr : attribute -> attribute list visitAction
Attribute. Each attribute can be replaced by a list
method queueInstr : instr list -> unit
Add here instructions while visiting to queue them to preceede 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.
method unqueueInstr : unit -> instr list
Gets the queue of instructions and resets the queue. This is done * automatically for you when you visit statments.