backport: re PR tree-optimization/71083 (Unaligned bit-field address when predictive...

backport: re PR tree-optimization/71083 (Unaligned bit-field address when predictive commoning)

2016-08-12  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        Backport from mainline
        2016-08-11  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR tree-optimization/71083
        * tree-predcom.c (ref_at_iteration): Correctly align the
        reference type.

testsuite:
2016-08-12  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        Backport from mainline
        2016-08-11  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR tree-optimization/71083
        * gcc.c-torture/execute/pr71083.c: New test.
        * gnat.dg/loop_optimization23.adb: New test.
        * gnat.dg/loop_optimization23_pkg.ads: New test.
        * gnat.dg/loop_optimization23_pkg.adb: New test.

From-SVN: r239424