Commit f9dd2c15d5bb058dc901e6444e061dfe450edb02
2020-08-02T18:03:16
Vulkan: Accumulate Buffer barriers. Uses an unordered_map in the CommandBufferHelper to track buffer reads and writes. Buffer barriers are tracked specially in the CommandBufferHelper class as a barrier we execute immediately when we execute the commands into the primary. So when we run into an incompatible buffer access we must start a new command buffer. The rules for an incompatible access are: - when we are reading a buffer, any prior write in the same command buffer is incompatible. - when we are writing a buffer, any prior read or write in the same command buffer is incopatible. Also adds a regression test using a new performance counter. Bug: angleproject:4429 Change-Id: I393a4ed87314f955eb998940b877ba76ea15a7b8 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2334091 Reviewed-by: Tim Van Patten <timvp@google.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Charlie Lao <cclao@google.com> Commit-Queue: Jamie Madill <jmadill@chromium.org>