tree aeeddf16b2630f08d5186fb4596a903b4281c7ae
parent 7e1e485744b7205c2bf62356cf0903371fc82b10
author Jim Stichnoth <stichnot@chromium.org> 1414173542 -0700
committer Jim Stichnoth <stichnot@chromium.org> 1414173542 -0700

Subzero: Minor refactoring/additions in preparation for phi edge splitting.

The only functional change (though not actually visible at this point) is that redundant assignment elimination is moved into a separate pass.

BUG= none
R=jvoung@chromium.org

Review URL: https://codereview.chromium.org/672393003