AMD has released Radeon Software Adrenalin 2019 Edition 19.9.1 for Windows

Support For
Gears 5
Up to 8% performance improvement in Gears of War 5 running DirectX 12 on Radeon Software Adrenalin 2019 Edition version 19.9.1 vs. 19.8.2.RS-310

Added Vulkan Support
VK_AMD_device_coherent_memory
This extension adds device coherent and device uncached memory types. Device coherent and uncached memory are expected to have lower performance for general access than non-device coherent memory but can be useful in certain scenarios particularly so for debugging.
VK_EXT_calibrated_timestamps
This extension provides an interface to query calibrated timestamps obtained quasi simultaneously from two time domains such as host and device time domains.
VK_EXT_line_rasterization
This extension adds some line rasterization features that are commonly used in CAD applications and that are supported in other APIs like OpenGL. These features include Bresenham-style line rasterization, smooth rectangular lines (coverage to alpha) and stippled lines for all three line rasterization modes.
VK_EXT_shader_demote_to_helper_invocation
This extension adds Vulkan support for the SPV_EXT_demote_to_helper_invocation SPIR-V extension. The SPIR-V extension provides a new instruction that allows shaders to "demote" a fragment shader invocation to behave like a helper invocation for its duration. The demoted invocation will have no further side effects and will not output to the framebuffer but remains active and can participate in computing derivatives and in subgroup operations. This is a better match for the "discard" instruction in HLSL.

  AMD Radeon Software Adrenalin 2019 Edition 19.9.1