>>> I also notice some really large times in the GLSL->TGSI pass copy >>> propogation on mul/div tests with matrices, tests take a fair while to >>> complete. >>> >> >> Unrelated to this I have noticed on some profiles when using nvc0 >> that the GLSL->TGSI passes are quite painful on compile times. >> Especially copy propagation shows up as a big one. >> Not sure if there is some easy gains to be had here as I haven't >> looked at the pass at all. > The GLSL->TGSI passes is probably slow too but I'm quite sure that my > code doesn't help...
Okay, the main problem with the tgsi passes is the sheer number of temporaries overwhelms it. For start st_src/dest_reg has a int16_t for index, on /home/airlied/devel/piglit/tests/spec/arb_gpu_shader_fp64/execution/vs-increment-dvec.shader_test we enter this code wantined to use over 32000 temps, if I fix the int16->int32, the final code seems to only use about 20 temps. Dave. _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
