[Bug bootstrap/71435] New: [7 regression] sparc bootstrap failure since r235625

[mikpelinux at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71435

            Bug ID: 71435
           Summary: [7 regression] sparc bootstrap failure since r235625
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mikpelinux at gmail dot com
  Target Milestone: ---

Attempting to bootstrap gcc-7-20160605 on sparc-linux fails with:

Comparing stages 2 and 3
Bootstrap comparison failure!
gcc/ira.o differs
gcc/double-int.o differs
make[2]: *** [compare] Error 1
make[2]: Leaving directory `/mnt/scratch/objdir7'
make[1]: *** [stage3-bubble] Error 2
make[1]: Leaving directory `/mnt/scratch/objdir7'
make: *** [bootstrap] Error 2

Last successful bootstrap was with gcc-7-20160424.  A bisection showed that the
failure started with the reload1 patch in r235625.

Configured on sparc64-linux-gnu with:
/mnt/scratch/gcc-7-20160605/configure --prefix=/mnt/scratch/install7
--with-gmp=/home/mikpe/pkgs/linux-sparc64/gmp-6.1.0
--with-mpfr=/home/mikpe/pkgs/linux-sparc64/mpfr-3.1.4
--with-mpc=/home/mikpe/pkgs/linux-sparc64/mpc-1.0.3 --enable-multilib
--disable-plugin --disable-lto --disable-nls --enable-threads=posix
--enable-checking=release --disable-libmudflap --enable-languages=c,c++
--build=sparc-unknown-linux --target=sparc-unknown-linux --with-cpu=ultrasparc
--enable-targets=all