[llvm-dev] getelementptr (original) (raw)

David Chisnall via llvm-dev llvm-dev at lists.llvm.org
Fri Sep 1 03:50:10 PDT 2017

On 1 Sep 2017, at 11:44, Anastasiya Ruzhanskaya via llvm-dev <llvm-dev at lists.llvm.org> wrote:

Hello, I wonder if the getelementptr can have other successors than load, store in some other cases when I directly print or directly return the result. every time I would like to assign the result - it will have a load/store successor? So, basically the overall question is to clarify the possible successors of getelementptr.

Any instruction that may take a pointer operand might be a user of a GEP. For example, consider this C function:

int x(struct S *s) { y(&s->field); }

Here, there will be a GEP to get the address of the field and then the user will be a call (or possibly invoke) instruction.

David

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