Pointer arithmetic doesn't work about odin

Minus operator increments the address

I guess because Token_Add and Token_Sub share the same code: f320958#diff-5f7101e83ab40f9f58bba057da941225R1488

https://github.com/gingerBill/Odin/blob/b78e970/src/ssa.c#L1551

GB_PANIC("TODO(bill): Ptr arith");

Not sure if related!

Manual pointer arithmetic workaround:

  p_u32 += 1;
  p_u32 = cast(^u32)cast(rawptr)(cast(uint)cast(rawptr)p_u32 - 1 * size_of(u32));

Prints:

initial buffer: [23]
changed buffer: [42]
p_u32 (should be 42): 42
p_u32 (should be 42): 42

[gingerBill]

Fixed!

@gingerBill Thank you!