git: openjdk/loom: fibers: Improve fast-path detection under OSR

[duke]

Changeset: b71b642b
Author:    Ron Pressler <ron.pressler at oracle.com>
Date:      2020-08-18 17:41:56 +0000
URL:       https://git.openjdk.java.net/loom/commit/b71b642b

Improve fast-path detection under OSR

! src/hotspot/cpu/x86/templateTable_x86.cpp
! src/hotspot/share/runtime/continuation.cpp
! src/hotspot/share/runtime/sharedRuntime.cpp
! src/hotspot/share/runtime/thread.hpp