hg: graal/graal-compiler: Backout ccdecd8cc1f2: Don't register unchanged stamps

[doug.simon at oracle.com]

Changeset: 4311a0d2fd36
Author:    Tom Rodriguez <tom.rodriguez at oracle.com>
Date:      2015-11-03 15:13 -0800
URL:       http://hg.openjdk.java.net/graal/graal-compiler/rev/4311a0d2fd36

Backout ccdecd8cc1f2: Don't register unchanged stamps

! graal/com.oracle.graal.phases.common/src/com/oracle/graal/phases/common/DominatorConditionalEliminationPhase.java