[Bug rtl-optimization/70596] [6 Regression] -fcompare-debug failure with one extra NOTE_INSN_DELETED

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70596

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-04-12
                 CC|                            |jakub at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This one is impossible to bisect, as the testcase ICEs starting with
r226901 and r232445 fixed this, but the -fcompare-debug issue is already there.
r226900 has been the last version that didn't ICE and didn't result in compare
debug failure.
That said, it is clearly the bug in r232445, we should never delete debug
insns, just reset them instead.  Let me try a fix.