[LLVMdev] Distinguishing Pointer Variable and Ordinary Variable

[Joey Gouly]

Check it's type to see if it's a pointer or not?


On 1 September 2013 12:31, Abhinash Jain <omnia at mailinator.com> wrote:

> C Code :-
> int main()
> {
>  int a=10,c;
>  int *b;
>  c=20;
>  *b=a;
>  return 0;
> }
>
> IR of above code :-
> define i32 @main() #0 {
> entry:
> 1.  %retval = alloca i32, align 4
> 2.  %a = alloca i32, align 4
> 3.  %c = alloca i32, align 4
> 4.  %b = alloca i32*, align 8
> 5.  store i32 0, i32* %retval
> 6.  store i32 10, i32* %a, align 4
> 7.  store i32 20, i32* %c, align 4
> 8.  %0 = load i32* %a, align 4
> 9.  %1 = load i32** %b, align 8
> 10.  store i32 %0, i32* %1, align 4
> 11.  ret i32 0
> }
>
>
> Line 8,9,10 of IR represents  *b=a;
>
> Now I want to recognise whether i32* %1  on line 10 is a pointer variable
> or
> ordinary variable through llvm pass.
> So how to solve this issue ???
>
>
>
> --
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