[dmd-internals] [D-Programming-Language/dmd] 620671: Merge pull request #5069 from WalterBright/go4

[GitHub via dmd-internals]

  Branch: refs/heads/dmd-1.x
  Home:   https://github.com/D-Programming-Language/dmd
  Commit: 62067110b65722425313b830a097afc95756b4d7
      https://github.com/D-Programming-Language/dmd/commit/62067110b65722425313b830a097afc95756b4d7
  Author: Daniel Murphy <yebblies at gmail.com>
  Date:   2015-09-12 (Sat, 12 Sep 2015)

  Changed paths:
    M src/backend/blockopt.c
    M src/backend/el.c
    M src/backend/gdag.c
    M src/backend/glocal.c
    M src/backend/gloop.c
    M src/backend/go.c
    M src/backend/go.h
    M src/backend/gother.c
    M src/backend/out.c
    M src/backend/var.c

  Log Message:
  -----------
  Merge pull request #5069 from WalterBright/go4

refactor: encapsulate some globals 4