Hello, The attached patch splits a new function df_insn_info_delete from df_insn_delete. The original motivation was to get rid of the silly "deleting insn with uid = ..." messages when re-scanning an insn, because the mentioned insn isn't deleted at all (it's just rescanned). But it turns out that there is also a modest but measurable speed-up (especially at -O0), probably because of avoiding the overhead of df_grow_bb_info and df_grow_reg_info in common usage of df_insn_delete.
Bootstrapped&tested on powerpc64-unknown-linux-gnu and on x86_64-unknown-linux-gnu. OK for trunk? Ciao! Steven
df_delete_insn_info.diff
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