hg: jdk9/hs-comp/hotspot: 8078666: JVM fastdebug build compiled with GCC 5 asserts with "widen increases"

[vladimir.kozlov at oracle.com]

Changeset: 629f25b8fc9d
Author:    sgehwolf
Date:      2015-04-29 12:23 -0700
URL:       http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/629f25b8fc9d

8078666: JVM fastdebug build compiled with GCC 5 asserts with "widen increases"
Summary: do the math on the unsigned type where overflows are well defined
Reviewed-by: kvn, aph

! src/share/vm/opto/type.cpp