gallium: Add a nir-to-TGSI pass.
The goal is to replace glsl_to_tgsi.cpp and its supporting code (~10k LOC). This code ends up being smaller because NIR has many lowering passes that help it map better to TGSI than GLSL IR does. As a benefit, this brings NIR optimizations to TGSI-only drivers. Many of the softpipe shaders I've looked at end up being significantly shorter. Some potentially relevant changes to TGSI consumers: - All immediates are now UINT typed. This means they're less legible in printouts, but means that they get deduplicated better (no more multiple copies of 0x0!) - Sampler views are not currently declared. - nir_registers don't have their live ranges tracked, so TGSI temp usage may go up with a lot of control flow. - nir_lower_vec_to_mov naively inserts movs instead of trying to coalesce the movs with the generators of the ssa values, sometimes increasing instruction count. Acked-by: Marek Olšák <marek.olsak@amd.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3395>
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@ -315,6 +315,7 @@ C_SOURCES := \
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NIR_SOURCES := \
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nir/tgsi_to_nir.c \
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nir/tgsi_to_nir.h \
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nir/nir_to_tgsi.c \
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nir/nir_draw_helpers.c \
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nir/nir_draw_helpers.h
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@ -329,6 +329,8 @@ files_libgallium = files(
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'util/u_viewport.h',
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'nir/tgsi_to_nir.c',
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'nir/tgsi_to_nir.h',
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'nir/nir_to_tgsi.c',
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'nir/nir_to_tgsi.h',
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'nir/nir_draw_helpers.c',
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'nir/nir_draw_helpers.h',
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)
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@ -0,0 +1,33 @@
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/*
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* Copyright © 2014 Broadcom
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef NIR_TO_TGSI_H
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#define NIR_TO_TGSI_H
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struct nir_shader;
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struct pipe_screen;
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const void *nir_to_tgsi(struct nir_shader *s,
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struct pipe_screen *screen);
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#endif /* NIR_TO_TGSI_H */
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