What llvm class does the clang use instead of llvm::ExecutionEngine?

Clang Frontend
1

Hello list,

I have a simple question.

Q: What llvm class does the clang use instead of llvm::ExecutionEngine?

I am studying clang and llvm tutorial.
In the llvm tutorial, a functional language - kaleidoscope - is explained.
For kaleidoscope, llvm::ExecutionEngine is used to JIT.
So I searched it in clang. But the class is not used in clang at all.
llvm::ExecutionEngine is for JIT compilation and Interpreter.

So I want to know then in clang what is used instead of llvm::ExecutionEngine.

I am looking in the source code but I welcome some help if possible.

Thank you in advance.

Best regards

2

Clang's codegen generates an llvm::Module with all the relevant code.
Once that is made, there are a number of LLVM API's which can be used
to operate on it, one of which is the ExecutionEngine API's which will
execute it; however, Clang doesn't JIT, so it really doesn't need
that, as you observed. The main function you want to look at for what
Clang does with the Module is clang::EmitBackendOutput() in
clang/lib/CodeGen/BackendUtil.cpp.

You may want to look at llc (in $LLVM_ROOT/tools/llc/) for a simpler
example of the same general idea.

-- Sean Silva

3

Hi Sean Silva,

This time also you.
Thank you. I appreciate your help.

Sincerely
Journeyer