Custom Pragmas Clang Tools

Clang Frontend
1

Hello,

I have been reading some articles [1, 2] regarding how to implement handlers for custom pragmas. Nonetheless, in those posts Clang source code has to be modified. I am developing an Clang tool out-of-tree, so I do not want to make a custom version of Clang. I was just wondering if it is possible to build a custom handler for pragmas out-of-tree or if I have to tackle another approach maybe using annotations (?) or any other workaround? Basically I want to use pragmas for indicating loops of interest for the tool in C/C++ code.
Thanks!

Regards,

[1] https://blog.quarkslab.com/implementing-a-custom-directive-handler-in-clang.html
[2] https://git.scc.kit.edu/CES/clang-custom-pragma

1 Like
2

You can create your own executable that creates a CompilerInstance and
adds pragma handles to it.

Example shown here:
https://github.com/Meinersbur/pet/blob/master/pet.cc#L1139

Michael

3

That is exactly what I was looking for.
Thank you so much.

Regards,

4

FYI: There’s also an example plugin that adds a pragma handler:

https://github.com/llvm/llvm-project/blob/master/clang/examples/AnnotateFunctions/AnnotateFunctions.cpp

-Hal