My understanding is that: both are used to traverse BBs and the only
(potential )difference is the order of the traversal. 'FOR_EACH_BB'
traverses BBs throught the linked list order; 'for (i=0; i<n_basic_blocks;
i++){bb=BASIC_BLOCK(i);}' traverses accoring to the BB's index (because
BASIC_BLOCK(i)->index ==i)
(Please correct me if my understanding is wrong:) )
So, is there any particular reason to pick up on over the other? For
example, function 'compute_defs_uses_and_gen()' in bt-load.c uses the latter
one to traverse basic blocks, but most other routines use the first one to
traverse BBs.
Thanks,
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