Created attachment 40759 [details] with llvmpipe The demo in question is src/samples/stencil.c found in the demo repository. With swrastg_dri.so, $ LIBGL_ALWAYS_SOFTWARE=1 GALLIUM_DRIVER=softpipe ./stencil gives correct result, but $ LIBGL_ALWAYS_SOFTWARE=1 GALLIUM_DRIVER=llvmpipe ./stencil gives incorrect result on my x86 machine. st/vega exhibits similar artifacts when used with llvmpipe.
Fixed with commit dbf996f30856c000e18e3700f741d4e92561b4ec. Committed to 7.9 branch too.
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