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v3d: Move the stores for fixed function VS output reads into NIR.

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This lets us emit the VPM_WRITEs directly from
nir_intrinsic_store_output() (useful once NIR scheduling is in place so
that we can reduce register pressure), and lets future NIR scheduling
schedule the math to generate them.  Even in the meantime, it looks like
this lets NIR DCE some more code and make better decisions.

total instructions in shared programs: 6429246 -> 6412976 (-0.25%)
total threads in shared programs: 153924 -> 153934 (<.01%)
total loops in shared programs: 486 -> 483 (-0.62%)
total uniforms in shared programs: 2385436 -> 2388195 (0.12%)

Acked-by: Ian Romanick <ian.d.romanick@intel.com> (nir)
This commit is contained in:
Eric Anholt
2019-02-22 14:26:26 -08:00
parent a9dd227a47
commit 2780a99ff8
5 changed files with 343 additions and 195 deletions
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3
src/broadcom/compiler/vir.c
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@@ -566,7 +566,6 @@ vir_compile_init(const struct v3d_compiler *compiler,
vir_set_emit_block(c, vir_new_block(c));
c->output_position_index = -1;
c->output_point_size_index = -1;
c->output_sample_mask_index = -1;
c->def_ht = _mesa_hash_table_create(c, _mesa_hash_pointer,
@@ -695,7 +694,7 @@ v3d_vs_set_prog_data(struct v3d_compile *c,
* channel).
*/
prog_data->vpm_input_size = align(prog_data->vpm_input_size, 8) / 8;
prog_data->vpm_output_size = align(c->num_vpm_writes, 8) / 8;
prog_data->vpm_output_size = align(c->vpm_output_size, 8) / 8;
/* Set us up for shared input/output segments. This is apparently
* necessary for our VCM setup to avoid varying corruption.