Invoking compilation after plugin execution

Clang Frontend
1

Hello,
i've written a plugin for clang, which i want to use in my compilation
process. What
i want to achieve is that my plugin executed first and then the
default compilation
starts. So far i've done the following:

1. I dumped the arguments for the default compilation with the '-###' argument.
2. Added my plugin invocation argument to these arguments. (-load
libpl.so -plugin pl)

After executing clang with the new argument string, i can see that
only my plugin is
executed and nothing else. So how do i achieve my goal?

Thanks,
Dimi

2

Hi,

-plugin replaces the codegen phase. You could use -add-plugin, which runs the plugin in addition to codegen—but after codegen (because the ast is supposed to be immutable once constructed).

What are you trying to do?
Nico

3

Hi,
my plugin performs some transformations on the AST. I want that the
code is generated after i performed this transformations.

Dimi

4

Hi,
my plugin performs some transformations on the AST. I want that the
code is generated after i performed this transformations.

As I said, I believe changing the AST after its construction is not
supported. Others might be able to say more (or why :slight_smile: ).

Nico

5

It'll work if you understand the AST and its invariants well enough to
maintain them properly. That's a pretty tall order, though, and we find
that most people are excessively optimistic.

John.