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nir/opt_shrink_vectors: shrink some intrinsics from start

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If the backend supports it, intrinsics with a component() are straightforward to
shrink from the start. Notably helps vectorized I/O.

v2: add an option for this and enable only on grown up backends, because some
backends ignore the component() parameter.

RADV GFX11:
Totals from 921 (1.16% of 79439) affected shaders:
Instrs: 616558 -> 615529 (-0.17%); split: -0.30%, +0.14%
CodeSize: 3099864 -> 3095632 (-0.14%); split: -0.25%, +0.11%
Latency: 2177075 -> 2160966 (-0.74%); split: -0.79%, +0.05%
InvThroughput: 299997 -> 298664 (-0.44%); split: -0.47%, +0.02%
VClause: 16343 -> 16395 (+0.32%); split: -0.01%, +0.32%
SClause: 10715 -> 10714 (-0.01%)
Copies: 24736 -> 24701 (-0.14%); split: -0.37%, +0.23%
PreVGPRs: 30179 -> 30173 (-0.02%)
VALU: 353472 -> 353439 (-0.01%); split: -0.03%, +0.02%
SALU: 40323 -> 40322 (-0.00%)
VMEM: 25353 -> 25352 (-0.00%)

AGX:

total instructions in shared programs: 2038217 -> 2038049 (<.01%)
instructions in affected programs: 10249 -> 10081 (-1.64%)

total alu in shared programs: 1593094 -> 1592939 (<.01%)
alu in affected programs: 7145 -> 6990 (-2.17%)

total fscib in shared programs: 1589254 -> 1589102 (<.01%)
fscib in affected programs: 7217 -> 7065 (-2.11%)

total bytes in shared programs: 13975666 -> 13974722 (<.01%)
bytes in affected programs: 65942 -> 64998 (-1.43%)

total regs in shared programs: 592758 -> 591187 (-0.27%)
regs in affected programs: 6936 -> 5365 (-22.65%)

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev> (v1)
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28004>
This commit is contained in:
Alyssa Rosenzweig
2024-03-07 13:47:14 -04:00
committed by Marge Bot
parent aa99753a28
commit a6123a80da
19 changed files with 70 additions and 44 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
src/gallium/auxiliary/nir/nir_to_tgsi.c
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@@ -3343,7 +3343,7 @@ ntt_optimize_nir(struct nir_shader *s, struct pipe_screen *screen,
};
NIR_PASS(progress, s, nir_opt_load_store_vectorize, &vectorize_opts);
NIR_PASS(progress, s, nir_opt_shrink_stores, true);
NIR_PASS(progress, s, nir_opt_shrink_vectors);
NIR_PASS(progress, s, nir_opt_shrink_vectors, false);
NIR_PASS(progress, s, nir_opt_loop);
NIR_PASS(progress, s, nir_opt_vectorize, ntt_should_vectorize_instr, NULL);
NIR_PASS(progress, s, nir_opt_undef);