Hi folks, I'm studying gcc's source code (4.4.3 for now) to learn how to optimize bitfield compilation. Currently I'm using C as an example. Since gcc is so big I need some guide here. So my questions are: 1. Does gcc compile C bitfields into some intermediate representation (IR)? 2. If so, does the optimization happen BEFORE or AFTER the IR? Or both? 3. Where can I find relevant source code? I already did a find+grep in gcc-4.4.3/gcc directory but I lack the general knowledge of the overall structure of gcc so the result didn't help much. 4. Is there any special flags for this feature? I hope I'm sending to the right list. If not please tell me where to go. Thanks in advance. Harry
