January 14, 2013
  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/dmd
  Commit: 4b139c0a217ccbf3c71a0d993eb6e3556254de60
      https://github.com/D-Programming-Language/dmd/commit/4b139c0a217ccbf3c71a0d993eb6e3556254de60
  Author: Walter Bright <walter@walterbright.com>
  Date:   2013-01-14 (Mon, 14 Jan 2013)

  Changed paths:
    M src/backend/cgelem.c
    M src/backend/cod4.c
    M src/backend/code.h
    M src/backend/evalu8.c
    M src/backend/gloop.c
    M src/backend/oper.h
    M src/backend/optabgen.c
    M src/declaration.c
    M src/func.c
    M src/mtype.c

  Log Message:
  -----------
  add BT pattern to optimizer


  Commit: 893548d9e9538ca56c2fadaf785d45114a9eebdc
      https://github.com/D-Programming-Language/dmd/commit/893548d9e9538ca56c2fadaf785d45114a9eebdc
  Author: Walter Bright <walter@walterbright.com>
  Date:   2013-01-14 (Mon, 14 Jan 2013)

  Changed paths:
    M test/runnable/test42.d

  Log Message:
  -----------
  add test case for BT patterns


  Commit: e540881d587d61b7c3a803a7bca76937c56c868b
      https://github.com/D-Programming-Language/dmd/commit/e540881d587d61b7c3a803a7bca76937c56c868b
  Author: Walter Bright <walter@walterbright.com>
  Date:   2013-01-14 (Mon, 14 Jan 2013)

  Changed paths:
    M src/backend/cgelem.c
    M src/backend/cod4.c
    M src/backend/code.h
    M src/backend/evalu8.c
    M src/backend/gloop.c
    M src/backend/oper.h
    M src/backend/optabgen.c
    M test/runnable/test42.d

  Log Message:
  -----------
  Merge pull request #1483 from WalterBright/b8

add BT pattern to optimizer


Compare: https://github.com/D-Programming-Language/dmd/compare/67ca915e3d89...e540881d587d