To generate the IR code to catch an exception, we must add the addLandingPad() method. The generated IR extracts the type information from the exception. If it matches the C++ [...]
To generate the IR code to raise an exception, we will add the addThrow() method. This new method needs to initialize the new fields and then generate the IR to [...]
With this, the exception handling facility is complete.To use exception handling in the compiler for your programming language, the simplest strategy is to piggyback on the existing C++ runtime functions. [...]
The handling of an exception is framed by calls to __cxa_begin_catch() and __cxa_end_catch(). The __cxa_begin_catch() function needs one argument – the current exception – which is one of the values [...]
The difference between both instructions is that invoke has two labels associated. The first label is where execution continues in case the called function ends normally, usually with a ret [...]
With IR generation introduced in the previous chapters, you can already implement most of the functionality required in a compiler. In this chapter, we will look at some advanced topics [...]
This approach can also be used for implementing interfaces. As an interface only has methods, each implemented interface adds a new vtable pointer to the object. This is easier to [...]
Multiple inheritance adds another challenge. If a class inherits from two or more base classes, then we need to combine the data members in such a way that they are [...]
Languages such as Java support interfaces. An interface is a collection of abstract methods, comparable to a base class with no data members and only abstract methods defined. Interfaces pose [...]