On 16.12.2011 11:53, Jakub Jelinek wrote:
On Fri, Dec 16, 2011 at 09:47:52AM +0400, Andrey Belevantsev wrote:
Thus, if an insn has any note that prevents it from being cloned, we
need to fix the above place. (If an insn should not even be moved
from its block, then CANT_MOVE should be set to 1 in the same
function.) Then create_copy_of_insn_rtx can safely copy all the
notes as we already know that only clonable insns get to this
function. The REG_EQUAL/REG_EQUIV notes may be dropped -- I thought
these are supposed to be recomputed by df these days, am I wrong?
REG_DEAD/REG_UNUSED notes are recomputed by df, I don't think
anything recomputes REG_EQUAL/REG_EQUIV.
Eric agrees with you, so the patch is OK. Thanks for the patch and for
enlightening me. And please feel free to CC/assign me on any PRs
mentioning selective scheduler.
Andrey
