This commit changes the prototype of getCopeType, so that it now takes 2
arguments.
1. The llvm::Type returned by the Copy function. This can be any scalar
llvm::Type.
2. The llvm::type of the argument representing the reference to the
value being copied. This should be a pointer-sized integer, where
pointer-sized means with the same size of a pointer in the
architecture in the input binary.
The second argument is not strictly necessary for now, because the whole
decompilation framework expects a binary with a single architecture,
hence a well defined unambiguous pointer size.
This will be used fully only when we start supporting multiple binaries.
Whenever that happens, if we haven't already fully dropped the Copy
helper function we will have to update the associated
OpaqueFunctionsPool to a type pair as key: the return type and the type
of the argument.
Before this commit, many passes in revng-c were skipping over
non-isolated functions.
Now revng-pipeline takes care of removing non-isolated functions so that
check can be omitted everywhere.
Pietro Fezzardi