[llvm-dev] GenericValue of pointer becomes 0 when passed through RunFunction

Hakan Aras via llvm-dev llvm-dev at lists.llvm.org
Mon Dec 10 10:52:52 PST 2018

I'm trying to pass a function pointer to the LLVM interpreter, but when I print it in the llvm function it is null. I'm using the C API.

Here's the relevant code (It's in D):


and here's the output:

define void @fp_pass_test(void ()*) {
  %1 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @0, i32 0, i32 0), void ()* %0)
  call void %0()
  ret void
passed ptr: 4142ddb0
unwrapped ptr: 4142ddb0
received ptr: 0
Program exited with code -11

Does anyone know why the pointer would become null after passing it through LLVMRunFunction?

Best Regards
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