hg: graal/graal-compiler: GraphPE: Improve stamp for phi functions during parsing

[doug.simon at oracle.com]

Changeset: a821d7d0ab7e
Author:    Christian Wimmer <christian.wimmer at oracle.com>
Date:      2016-01-27 09:35 -0800
URL:       http://hg.openjdk.java.net/graal/graal-compiler/rev/a821d7d0ab7e

GraphPE: Improve stamp for phi functions during parsing

! graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/GraphDecoder.java
! graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/SimplifyingGraphDecoder.java
! graal/com.oracle.graal.truffle.test/src/com/oracle/graal/truffle/test/PhiStampInferencePartialEvaluationTest.java