hg: jdk9/hs-comp/hotspot: 8160651: StubRoutines::_dtan does not restore callee save register rbx

[tobias.hartmann at oracle.com]

Changeset: cfb594b3cdbe
Author:    thartmann
Date:      2016-07-04 09:14 +0200
URL:       http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/cfb594b3cdbe

8160651: StubRoutines::_dtan does not restore callee save register rbx
Summary: Pop rbx before leaving stub.
Reviewed-by: vlivanov, vdeshpande

! src/cpu/x86/vm/macroAssembler_x86_tan.cpp
! src/share/vm/opto/library_call.cpp