Each type of node is assigned a different id to make it easily possible to do a switch over all nodes.
The computational type of the underlying value.
true
if the expression is GUARANTEED to have no externally observable effect if it is
not executed.
true
if the expression is GUARANTEED to have no externally observable effect if it is
not executed. Sideeffect free instructions can be removed if the result of the evaluation
of the expression is not used. For those expressions, which may result in an exception it
has to be guaranteed that the exception is NEVER thrown. For example, a div instruction
is sideeffect free if it is (statically) known that the divisor is always not equal to zero;
otherwise, even if the result value is not used, the expression is not (potentially) side
effect free.
true
if the expression is GUARENTEED to have no side effect other than
wasting some CPU cycles if it is not executed.
A human readable name of the local variable.
Identifies the single index(pc) of the instruction which initialized the variable. I.e., per method there must be at most one D variable which has the given origin. Initially, the pc of the underlying bytecode instruction is used.