[LLVMdev] how to invoke C functions in llvm IR ?

[li zhijie]

Hi all,
  I am a new user of LLVM~.
  I want to use LLVM C++ API to generate the LLVM IR.The question is how I
can call the C functions in LLVM IR.I did not find the APIs in the
documents.

  For Example:
   Function *func = Function:Create(...) //create a LLVM function
   Here is another function I cannot represent with LLVM IR(maybe too
complex),so I want to invoke the C function with LLVM IR in func.How can I
do it?

--Thanks
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