Generate and run LLVM code from native C/C++

Question

Is it possible to do these things from a native C or C++-compiled program (gcc):

Call clang and compile given C code of a function, passed as const char *.
Obtain a pointer and run it in the LLVM virtual machine.
Acquire the result in the native program and continue.

How?

I think a better more descriptive title is needed to catch attention of more SO users. — Sarfaraz Nawaz
– Sarfaraz Nawaz, Commented Aug 11, 2012 at 12:14
Of course it is possible. See root.cern.ch/drupal/content/cling for example. — SK-logic
– SK-logic, Commented Aug 11, 2012 at 18:39
This is a duplicate of stackoverflow.com/questions/3224485/…. — razeh
– razeh, Commented Aug 12, 2012 at 21:03
Have a look at Cling. For an example of a function in a C++ interpreter you can check this article: solarianprogrammer.com/2012/08/14/cling-cpp-11-interpreter — mmisu
– mmisu, Commented Aug 15, 2012 at 12:09

SK-logic · Accepted Answer · 2012-08-13 16:46:41Z

7

+100

For a minimalistic example, see Clang interpreter.

Cling is bit more practical example of such an approach.

answered Aug 13, 2012 at 16:46

SK-logic

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2 Comments

SK-logic Over a year ago

@James, it is an interactive C++ interpreter based on LLVM and Clang and optionally integrated into ROOT. Sort of a replacement for their older Cint thing.

Robin Over a year ago

This is what I posted below the code. Cling implements JIT which is offered by llvm, see this link on how to use it: llvm.org/docs/tutorial/LangImpl4.html

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