hg: jdk/jdk: 8202465: [C1] casts should not be eliminated for interface types

[vladimir.x.ivanov at oracle.com]

Changeset: 947f79c91b35
Author:    vlivanov
Date:      2018-05-04 16:49 -0700
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/947f79c91b35

8202465: [C1] casts should not be eliminated for interface types
Reviewed-by: jrose, thartmann

! src/hotspot/share/c1/c1_Canonicalizer.cpp
- test/jdk/java/lang/invoke/I4Special.jcod
! test/jdk/java/lang/invoke/SpecialInterfaceCall.java
+ test/jdk/java/lang/invoke/SpecialInterfaceCallI4.jasm