On 11/03/2011 08:01 PM, Eric Botcazou wrote:
+ info.insert_before = insn;
+ info.first = new_insn;
+ info.fixed_regs_live = insn_info->fixed_regs_live;
+ info.failure = false;
+ for (cur = new_insn; cur; cur = NEXT_INSN (cur))
+ {
+ info.current = cur;
+ note_stores (PATTERN (cur), note_add_store,&info);
+ }
Unless I'm missing something, this is going all the way down to the end
of the function, bypassing the CFG, so it is neither efficient nor correct.
For DSE you should set up backwards liveness simulation, and use that
instead of note_stores and insn scanning. I don't know postreload well
enough, but liveness simulation might work there too.
Paolo
