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nir/linker: add option to ignore the IO precisions for better varying packing

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Backends that don't handle IO component precision can pack more varyings
into one slot if the linker ignores the precision. If the IO is vectorized
then this can save IO instructions.

Related: 165a69d2f7
    nir: handle mediump varyings in varying compaction helpers

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10722>
This commit is contained in:
Gert Wollny
2021-05-10 08:54:50 +02:00
parent 629e8347ad
commit 4c045ad11e
2 changed files with 11 additions and 6 deletions
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12
src/compiler/nir/nir_linking_helpers.c
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@@ -582,9 +582,9 @@ gather_varying_component_info(nir_shader *producer, nir_shader *consumer,
vc_info->interp_loc = get_interp_loc(in_var);
vc_info->is_32bit = glsl_type_is_32bit(type);
vc_info->is_patch = in_var->data.patch;
vc_info->is_mediump =
in_var->data.precision == GLSL_PRECISION_MEDIUM ||
in_var->data.precision == GLSL_PRECISION_LOW;
vc_info->is_mediump = !producer->options->linker_ignore_precision &&
(in_var->data.precision == GLSL_PRECISION_MEDIUM ||
in_var->data.precision == GLSL_PRECISION_LOW);
vc_info->is_intra_stage_only = false;
vc_info->initialised = true;
}
@@ -647,9 +647,9 @@ gather_varying_component_info(nir_shader *producer, nir_shader *consumer,
vc_info->interp_loc = get_interp_loc(out_var);
vc_info->is_32bit = glsl_type_is_32bit(type);
vc_info->is_patch = out_var->data.patch;
vc_info->is_mediump =
out_var->data.precision == GLSL_PRECISION_MEDIUM ||
out_var->data.precision == GLSL_PRECISION_LOW;
vc_info->is_mediump = !producer->options->linker_ignore_precision &&
(out_var->data.precision == GLSL_PRECISION_MEDIUM ||
out_var->data.precision == GLSL_PRECISION_LOW);
vc_info->is_intra_stage_only = true;
vc_info->initialised = true;
}