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[patch][sparc] remove sparc machine_reorg, add machine specifc pass after delayed-branch scheduling


Hello,

This patch removes a dbr_schedule() call from the sparc back end, and
plugs in a sparc-specific pass that needs the insn chain in
delayed-branch scheduled form after pass_delay_slots. This is
essentially the same patch as the one I posted yesterday
(http://gcc.gnu.org/ml/gcc-patches/2013-04/msg00197.html) but with a
few fixes so that bootstrap+regtest actually passes :-)

The purpose of this patch is to make a step towards passing
verify_flow_info after pass_machine_reorg. Currently bug
middle-end/43631 is a blocker for this, but with a few hacks around
that bug, a few ports already can run and pass verify_flow_info after
their machine reorg.

Bootstrapped and tested on sparc64-unknown-linux-gnu.
OK for trunk?

Ciao!
Steven

Attachment: sparc_errata_as_machine_pass.diff.txt
Description: Text document


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