tree fd175cd50a664eb9708843d5358861ec0e00ea4a
parent efb89713cd549377d4746d56c8b164b50023f088
author Andrew Scull <ascull@google.com> 1441327830 -0700
committer Andrew Scull <ascull@google.com> 1441327830 -0700

This improves the variable use weight by taking into account use in loops. It
further improves spec2k performance and fixes the regression in ammp. Loops are
identified using an extension to Tarjan's algorithm.

BUG=
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1318553003.