Peng Zhao <blue_3...@hotmail.com> writes: > 1. what is the purpose of the reg_note and ds_t?
The reg-note lives in the RTL. ds_t is the same information represented as a bitflag. E.g., see how the bits are accumulated in a ds_t variable in ask_dependency_caches. > Where can I find information about memory dependences such as a write > and read on elementa[100] ? Sometimes meory dependence should be > handled differenly with reg dependece in CG, such as the latency > between the producer and the consumer. The reg-notes do handle some memory dependencies. Also, see true_dependence and friends in alias.c. Richard Guenther probably has a better answer. > 2. What different purpose are haifa_note_mem_dep and haifa_note_dep for? To add a memory dependency. Ian
