Hi, Ian
> That documentation is out of date. The CFG is now retained through most
> of the RTL passes.
You said "through most of the RTLpasses". And I found the CFG
is freed before other passes in gcc/passes.c.
NEXT_PASS (pass_free_cfg);
NEXT_PASS (pass_machine_reorg);
NEXT_PASS (pass_cleanup_barriers);
NEXT_PASS (pass_delay_slots);
NEXT_PASS (pass_split_for_shorten_branches);
NEXT_PASS (pass_convert_to_eh_region_ranges);
NEXT_PASS (pass_shorten_branches);
NEXT_PASS (pass_set_nothrow_function_flags);
NEXT_PASS (pass_final);
Is the CFG the same as the one in the assembly? I mean
if I analysis the assembly and contruct the CFG back, they
are the same?
Thanks.
Regards,
chenwj
--
Wei-Ren Chen (陳韋任)
Computer Systems Lab, Institute of Information Science,
Academia Sinica, Taiwan (R.O.C.)
Tel:886-2-2788-3799 #1667
