What I’m trying to do is take a pointer to “i” on “x” and then assign a value to “x” (like a dereference) and then finally dereference “x” again and pass that to a function call.
I’m confused about why the first version works but doesn’t need to do the usual load a temporary, like the failed version does. If I don’t store the value on x this second version does work, so what am I doing wrong?
In the second version, the code fails because of an incorrect usage of the load instruction. Specifically, in the line %x = load ptr, ptr @x, align 8, you are attempting to load a pointer value from the address stored in @x. This is incorrect because the type specified for the load instruction should match the type of the value being loaded which is i64
OK I see what you mean. This is basically what I’m try to do.
int main() {
int i = 3;
int *x = &i;
*x = 1;
// then printf the value at *x
}
I can’t figure out how to get Godbolt to use LLVM 16 so it doesn’t have opaque pointers but here is the version I found a template for. It looks like what I did wrong was the store to %0 and I changed the type.
thanks.