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nouveau/nv30: disable GLSL IR loop unrolling

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NIR loop unrolling is already enabled so just let it do its job.

Shader-db results (nv40):

total instructions in shared programs: 17446532 -> 17446068 (<.01%)
instructions in affected programs: 15532 -> 15068 (-2.99%)
total gpr in shared programs: 82658 -> 82801 (0.17%)
gpr in affected programs: 1680 -> 1823 (8.51%)

Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16366>
This commit is contained in:
Timothy Arceri 2022-05-06 11:47:11 +10:00 • committed by Marge Bot
parent bb2f97eb27
commit fa3b6a3d32
1 changed files with 3 additions and 4 deletions
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7
src/gallium/drivers/nouveau/nv30/nv30_screen.c
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@ -345,10 +345,9 @@ nv30_screen_get_shader_param(struct pipe_screen *pscreen,
return 1;
case PIPE_SHADER_CAP_MAX_TEMPS:
return (eng3d->oclass >= NV40_3D_CLASS) ? 32 : 13;
case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
return 32;
case PIPE_SHADER_CAP_PREFERRED_IR:
return (NOUVEAU_DEBUG & NOUVEAU_DEBUG_USE_TGSI) ? PIPE_SHADER_IR_TGSI : PIPE_SHADER_IR_NIR;
case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
return 0;
@ -404,10 +403,9 @@ nv30_screen_get_shader_param(struct pipe_screen *pscreen,
case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
return 16;
case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
return 32;
case PIPE_SHADER_CAP_PREFERRED_IR:
return (NOUVEAU_DEBUG & NOUVEAU_DEBUG_USE_TGSI) ? PIPE_SHADER_IR_TGSI : PIPE_SHADER_IR_NIR;
case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
case PIPE_SHADER_CAP_CONT_SUPPORTED:
case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
@ -496,6 +494,7 @@ static const nir_shader_compiler_options nv30_base_compiler_options = {
.lower_rotate = true,
.lower_uniforms_to_ubo = true,
.lower_vector_cmp = true,
.force_indirect_unrolling = nir_var_all,
.force_indirect_unrolling_sampler = true,
.max_unroll_iterations = 32,
.no_integers = true,