tree 475c779c2ee973cf51a0a63c9d010c59c4b2d022
parent 269c3360f8e69e9faf8bc8a51fd87ae7adadfb59
author Nicolas Geoffray <ngeoffray@google.com> 1407362574 +0100
committer Nicolas Geoffray <ngeoffray@google.com> 1407366151 +0100

Fix SsaDeadPhiElimination in the presence of dependent phis.

This fixes the problem of having a dead loop phi taking as back-edge
input a phi that also has this loop phi as input. Walking backwards
does not solve the problem because the loop phi will be visited last.

Most of the time, dex removes dead locals like this.

Change-Id: I797198cf9c15f8faa6585cca157810e23aaa4940