hg: jdk-updates/jdk13u-dev: 3 new changesets

[vkempik at azul.com]

Changeset: 50f56f18f2b9
Author:    vdeshpande
Date:      2019-10-04 11:45 -0700
URL:       https://hg.openjdk.java.net/jdk-updates/jdk13u-dev/rev/50f56f18f2b9

8221092: UseAVX=3 has performance degredation on Skylake (X7) processors
Summary: Fix for UseAVX=3 has performance degredation on Skylake (X7) processors
Reviewed-by: kvn

! src/hotspot/cpu/x86/globals_x86.hpp
! src/hotspot/cpu/x86/macroAssembler_x86.cpp
! src/hotspot/cpu/x86/stubGenerator_x86_64.cpp
! src/hotspot/cpu/x86/vm_version_x86.cpp
! src/hotspot/cpu/x86/vm_version_x86.hpp
! src/hotspot/cpu/x86/x86.ad

Changeset: 3bccfddab972
Author:    sviswanathan
Date:      2019-11-26 19:19 +0300
URL:       https://hg.openjdk.java.net/jdk-updates/jdk13u-dev/rev/3bccfddab972

8234610: MaxVectorSize set wrongly when UseAVX=3 is specified after JDK-8221092
Reviewed-by: kvn, vlivanov

! src/hotspot/cpu/x86/vm_version_x86.cpp

Changeset: 2271e4fbde56
Author:    dbuck
Date:      2020-02-10 03:35 -0500
URL:       https://hg.openjdk.java.net/jdk-updates/jdk13u-dev/rev/2271e4fbde56

8238596: AVX enabled by default for Skylake even when unsupported
Summary: Only default to UseAVX=2 when support is detected
Reviewed-by: shade, vlivanov

! src/hotspot/cpu/x86/vm_version_x86.cpp
! src/hotspot/cpu/x86/vm_version_x86.hpp