[llvm-dev] How to implement function pointer? (original) (raw)
Philip Pfaffe via llvm-dev llvm-dev at lists.llvm.org
Tue Feb 26 03🔞41 PST 2019
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Hi Yafei,
you're looking for the FunctionType.
Cheers, Philip
On Tue, Feb 26, 2019 at 11:15 AM Yafei Liu via llvm-dev < llvm-dev at lists.llvm.org> wrote:
Hi, I'm learning to use llvm api to generate IR code, I got two good tutorials, https://llvm.org/docs/tutorial/ and https://www.ibm.com/developerworks/library/os-createcompilerllvm1/index.html, but non of those showed how to implement a function pointer(or at least there is but I didn't find out).
For example I got a c style code like this: int foo(int i) { return ++i; } int (*p)(int); int main() { p = foo; p(3); } I turn it into IR code and found the sytex of a function pointer is: @p = global i32 (i32)* null, align 8 I tried play with llvm::PointerType but I cannot get the sytex, so could anyone teach me how to do this?
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