[Bug target/66930] [5 Regression]: gengtype.c is miscompiled during stage2

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66930

--- Comment #1 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to John Paul Adrian Glaubitz from comment #0)
> As previously discussed in private mail, I am now filing a bug report for
> the regression in gcc-5 that was introduced somewhere between r222550 and
> r225710 which leads to the miscompilation of gcc/gengtype.c when building a
> native compiler on SH [1]:

Looking at the SVN log for gcc-5-branch:
   svn log -r222550:r225710

shows the following SH specific commits...

------------------------------------------------------------------------
r223722 | kkojima | 2015-05-27 07:37:06 +0900 (Wed, 27 May 2015) | 5 lines

PR target/65979
* config/sh/sh.md (tstsi_t peephole2): Use gen_rtx_SET and take into
  account the case that operands[1] and operands[2] are the same register.

------------------------------------------------------------------------
r225094 | olegendo | 2015-06-27 09:46:58 +0900 (Sat, 27 Jun 2015) | 9 lines

gcc/
        Backport from mainline
        2015-06-25  Oleg Endo  <olegendo@gcc.gnu.org>

        PR target/65979
        PR target/66611
        * config/sh/sh.md (tstsi_t peephole2): Use insn_invalid_p to check if
        the replacement insn will work.

------------------------------------------------------------------------
r225660 | kkojima | 2015-07-10 18:50:18 +0900 (Fri, 10 Jul 2015) | 5 lines

PR target/66780
* config/sh/sh.md (symGOT_load): Revert a part of 2015-03-03
change for target/65249.