Add a pass to inline __original_main() into main() (#2461)

clang/llvm introduce __original_main as a workaround for
the fact that main may have different signatures. A downside
to that is that users get it in stack traces, which is confusing.

In -O2 and above we normally inline __original_main anyhow,
but as this is for debugging, non-optimized builds matter too,
so add a pass for this.

The implementation is trivial, just call doInling. However we
must check some corner cases first.

Bonus minor fixes to FindAllPointers, which unnecessarily
created an object to get the class Id (which is not valid
for all classes), and that it didn't take the input by
reference properly, which meant we couldn't get the
pointer to the function body's toplevel.

0 files changed, 0 insertions, 0 deletions