On Thu, May 7, 2015 at 4:50 PM, Jason Ekstrand <ja...@jlekstrand.net> wrote: > GLSL IR vs. NIR shader-db results for SIMD8 vertex shaders on Broadwell: > > total instructions in shared programs: 2724483 -> 2711790 (-0.47%) > instructions in affected programs: 1860859 -> 1848166 (-0.68%) > helped: 4387 > HURT: 4758 > GAINED: 1499 > > The gained programs are ARB vertext programs that were previously going > through the vec4 backend. Now that we have prog_to_nir, ARB vertex > programs can go through the scalar backend so they show up as "gained" in > the shader-db results.
Again, I'm kind of confused and disappointed that we're just okay with hurting 4700 programs without more analysis. I guess I'll go do that... I'm concerned -- lots of shaders like left-4-dead-2/low/3699 go from 297 -> 161 instructions. More concerning, the number of send instructions drop from 36 to 12, and a loop that was 111 instructions long suddenly becomes START B1 <-B0 <-B2 cmp.ge.f0(8) null g42<8,8,1>D g7<0,1,0>D (+f0) break(8) JIP: 24 UIP: 24 END B1 ->B3 ->B2 START B2 <-B1 add(8) g42<1>D g42<8,8,1>D 1D while(8) JIP: -32 END B2 ->B1 That deserves a lot more investigation. I'll take a gamble and say something is broken. _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
