* basic-block.h (first_insn_after_basic_block_note): Declare.
* flow.c (first_insn_after_basic_block_note): Define. Moved
from...
* ssa.c (first_insn_after_basic_block_note): Remove.
* ssa-dce.c (find_inherently_necessary): Consider BARRIERs
necessary.
(ssa_eliminate_dead_code): Properly update the CFG and PHI
nodes when we find a dead conditional branch. Insert BARRIERs
after any blocks with no successors, but which do not have
any BARRIERs.
From-SVN: r43816
* ssa-dce.c (note_inherently_necessary_set): New function.
(find_inherently_necessary): Use it. Do not consider
NOTEs, CODE_LABELs or BARRIERS are necessary. Improve
handling of asms and unspecs.
(delete_insn_bb): Only delete INSNs, CALL_INSNs or JUMP_INSNs.
From-SVN: r43656