* df.h (df_insn_delete): Adjust prototype.
* emit-rtl.c (remove_insn): Pass a basic block to df_insn_delete
and let it decide whether mark the basic block dirty.
(set_insn_deleted): Only pass INSN_P insns to df_insn_delete.
* df-scan.c (df_insn_info_delete): New helper function, split
off from df_insn_delete.
(df_scan_free_bb_info): Use it.
(df_insn_rescan, df_insn_rescan_all, df_process_deferred_rescans):
Likewise.
(df_insn_delete): Likewise. Take insn rtx as argument. Verify
that the insn is actually an insn and it has a non-NULL basic block.
Do not mark basic block dirty if only deleting a DEBUG_INSN.
From-SVN: r196977
