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pan/bi/ra: Allow offsets on tied sources

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The only real requirement here is that the destination offset is zero
and that the destination is big enough to hold the source.  The source
offset doesn't matter.

Fixes: bc17288697 ("pan/bi: Lower split/collect before RA")
Reviewed-by: Lorenzo Rossi <lorenzo.rossi@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40720>
This commit is contained in:
Faith Ekstrand 2026-03-30 18:09:42 -04:00 • committed by Marge Bot
parent 538b5c411e
commit 05c5e52054
1 changed files with 4 additions and 5 deletions
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9
src/panfrost/compiler/bifrost/bi_ra.c
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@ -919,13 +919,12 @@ bi_coalesce_tied(bi_context *ctx)
bi_builder b = bi_init_builder(ctx, bi_before_instr(I));
unsigned n = bi_count_read_registers(I, 0);
bi_index dst = I->dest[0], src = I->src[0];
assert(dst.offset == 0);
for (unsigned i = 0; i < n; ++i) {
bi_index dst = I->dest[0], src = I->src[0];
assert(dst.offset == 0 && src.offset == 0);
dst.offset = src.offset = i;
bi_mov_i32_to(&b, dst, src);
dst.offset++;
src.offset++;
}
bi_replace_src(I, 0, I->dest[0]);