tree 2e46c813bcd066121ed77b8d0ce98dcec101053b
parent a522972b9249eedd733a1c34b7c0117811d111d7
author Jim Stichnoth <stichnot@chromium.org> 1410802934 -0700
committer Jim Stichnoth <stichnot@chromium.org> 1410802934 -0700

Subzero: Fix incorrect address mode inference involving Phi temporaries.

Also, refactor the key part of the address mode inference into separate functions, since it's getting unwieldy.

The main thing is that we mark phi temporaries as multi-definition, and disallow address mode inference transformations that involve such temporaries, because this is incorrect particular when there are backward branches involved.

BUG= none
R=jvoung@chromium.org

Review URL: https://codereview.chromium.org/557953007