hg: jdk9/hs/hotspot: 8168770: Fix for 8151988 causes performance regression on SPARC

[tobias.hartmann at oracle.com]

Changeset: 276657e0e3b4
Author:    thartmann
Date:      2016-10-31 09:50 +0100
URL:       http://hg.openjdk.java.net/jdk9/hs/hotspot/rev/276657e0e3b4

8168770: Fix for 8151988 causes performance regression on SPARC
Summary: Reversed and re-implemented fix for 8151988 to eagerly cut off control input of Div and Mod nodes.
Reviewed-by: kvn

! src/share/vm/opto/compile.cpp
! src/share/vm/opto/divnode.cpp