hg: jdk10/hs/hotspot: 8178811: Minimize the AVX <-> SSE transition penalty through generation of vzeroupper instruction on x86

[vladimir.kozlov at oracle.com]

Changeset: c1995208a14f
Author:    vdeshpande
Date:      2017-05-05 19:28 -0700
URL:       http://hg.openjdk.java.net/jdk10/hs/hotspot/rev/c1995208a14f

8178811: Minimize the AVX <-> SSE transition penalty through generation of vzeroupper instruction on x86
Reviewed-by: kvn

! src/cpu/x86/vm/assembler_x86.cpp
! src/cpu/x86/vm/macroAssembler_x86.cpp
! src/cpu/x86/vm/sharedRuntime_x86_32.cpp
! src/cpu/x86/vm/sharedRuntime_x86_64.cpp
! src/cpu/x86/vm/stubGenerator_x86_32.cpp
! src/cpu/x86/vm/stubGenerator_x86_64.cpp
! src/cpu/x86/vm/vmStructs_x86.hpp
! src/cpu/x86/vm/vm_version_x86.cpp
! src/cpu/x86/vm/vm_version_x86.hpp
! src/cpu/x86/vm/x86_32.ad
! src/cpu/x86/vm/x86_64.ad
! src/share/vm/jvmci/vmStructs_jvmci.cpp