[dmd-internals] [D-Programming-Language/dmd] 2b9b6d: improve copy propagation optimization

[GitHub via dmd-internals]

  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/dmd
  Commit: 2b9b6d5bc73b4e9ba3b1144762c4ac9293b2d951
      https://github.com/D-Programming-Language/dmd/commit/2b9b6d5bc73b4e9ba3b1144762c4ac9293b2d951
  Author: Walter Bright <walter at walterbright.com>
  Date:   2015-08-18 (Tue, 18 Aug 2015)

  Changed paths:
    M src/backend/gother.c

  Log Message:
  -----------
  improve copy propagation optimization


  Commit: f37e246db188aad2baea5221aaa75ac9c8714af7
      https://github.com/D-Programming-Language/dmd/commit/f37e246db188aad2baea5221aaa75ac9c8714af7
  Author: Martin Nowak <code at dawg.eu>
  Date:   2015-08-20 (Thu, 20 Aug 2015)

  Changed paths:
    M src/backend/gother.c

  Log Message:
  -----------
  Merge pull request #4906 from WalterBright/betterCopyProp

improve copy propagation optimization


Compare: https://github.com/D-Programming-Language/dmd/compare/3cd472bfa099...f37e246db188