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From: "rearnsha at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/59896] [4.9 regression] Bootstrap: Thumb-1 LRA unable to generate reloads for jump_insn
Date: Tue, 21 Jan 2014 14:48:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: rtl-optimization
X-Bugzilla-Version: 4.9.0
X-Bugzilla-Keywords: ice-on-valid-code, ra
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X-Bugzilla-Who: rearnsha at gcc dot gnu.org
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59896

Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code, ra
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-01-21
          Component|target                      |rtl-optimization
            Summary|Thumb-1 LRA unable to       |[4.9 regression] Bootstrap:
                   |generate reloads for        |Thumb-1 LRA unable to
                   |jump_insn                   |generate reloads for
                   |                            |jump_insn
     Ever confirmed|0                           |1

--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
This prevents building newlib during a bootstrap.

Seems to have started with:

2014-01-16  Vladimir Makarov  <vmakarov@redhat.com>

        PR middle-end/59609
        * lra-constraints.c (process_alt_operands): Add printing debug
        info.  Check absence of input/output reloads for matched operands
        too.