[LLVMdev] Passing a function pointer as parameter to function call?

[Kevin Hu]

Dear all,


I'm writing an LLVM pass, and I want to insert a call instruction that
takes a function pointer as a parameter. The effect would be the same as
following:

atexit(foo);

Where foo is a function I insert with M.getOrInsertFunction(), which in
LLVM is a Function class.

I searched for a while and did not come up with a satisfying answer. Should
I create a Value class of pointer type, or a Int64Ty for a pointer? How do
I get the pointer to the function I create? I also tried passing foo as
Function* in LLVM as parameter to create CallInst directly, and I doesn't
seem to work.

Any hints and enlightenment is appreciated. Many thanks.


Regards,
Yours,
Kevin Hu
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