[llvm-dev] How to implement function pointer?

[Yafei Liu via llvm-dev]

Hi Philip,
Isn't function pointer a pointer first? I checked  FunctionType and still
have no idea about how to do this, can you show me which api in
FunctionType should I use?

On Tue, Feb 26, 2019 at 7:18 PM Philip Pfaffe <philip.pfaffe at gmail.com>
wrote:

> Hi Yafei,
>
> you're looking for the [FunctionType](
> http://llvm.org/doxygen/classllvm_1_1FunctionType.html).
>
> 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?
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
>
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