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We run this after nir_lower_vars_to_ssa so that as many load/store_var intrinsics as possible before copy_prop_vars executes. This is because the pass isn't particularly efficient (it does a lot of linear walks of a linked list) so we'd like as much of the work as possible to be done before copy_prop_vars runs. Shader DB results on Sky Lake: total instructions in shared programs: 12020290 -> 12013627 (-0.06%) instructions in affected programs: 26033 -> 19370 (-25.59%) helped: 16 HURT: 13 total cycles in shared programs: 137772848 -> 137549012 (-0.16%) cycles in affected programs: 6955660 -> 6731824 (-3.22%) helped: 217 HURT: 237 total loops in shared programs: 3208 -> 3208 (0.00%) loops in affected programs: 0 -> 0 helped: 0 HURT: 0 total spills in shared programs: 4112 -> 4057 (-1.34%) spills in affected programs: 483 -> 428 (-11.39%) helped: 2 HURT: 0 total fills in shared programs: 5519 -> 5102 (-7.56%) fills in affected programs: 993 -> 576 (-41.99%) helped: 2 HURT: 0 LOST: 0 GAINED: 0 Broadwell had similar results. On older hardware, the impact isn't as large because they don't advertise GL 4.5. Of the hurt programs, all but one are hurt by a single instruction and the one is hurt by 3 instructions. All of the helped programs, on the other hand, are helped by at least 3 instructions and one kerbal space program shader is helped by 44.59%. The real star of the show, however, is the Gl43CSDof synmark2 benchmark which has two shaders which are cut by 28% and 40% and the over-all runtime performance of the benchmark on my Sky Lake laptop is improved by around 25-30% (it's a bit hard to be exact due to thermal throttling). Reviewed-by: Timothy Arceri <timothy.arceri@collabora.com>
File: docs/README.WIN32 Last updated: 21 June 2013 Quick Start ----- ----- Windows drivers are build with SCons. Makefiles or Visual Studio projects are no longer shipped or supported. Run scons libgl-gdi to build gallium based GDI driver. This will work both with MSVS or Mingw. Windows Drivers ------- ------- At this time, only the gallium GDI driver is known to work. Source code also exists in the tree for other drivers in src/mesa/drivers/windows, but the status of this code is unknown. Recipe ------ Building on windows requires several open-source packages. These are steps that work as of this writing. - install python 2.7 - install scons (latest) - install mingw, flex, and bison - install pywin32 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs get pywin32-218.4.win-amd64-py2.7.exe - install git - download mesa from git see http://www.mesa3d.org/repository.html - run scons General ------- After building, you can copy the above DLL files to a place in your PATH such as $SystemRoot/SYSTEM32. If you don't like putting things in a system directory, place them in the same directory as the executable(s). Be careful about accidentially overwriting files of the same name in the SYSTEM32 directory. The DLL files are built so that the external entry points use the stdcall calling convention. Static LIB files are not built. The LIB files that are built with are the linker import files associated with the DLL files. The si-glu sources are used to build the GLU libs. This was done mainly to get the better tessellator code. If you have a Windows-related build problem or question, please post to the mesa-dev or mesa-users list.