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nir/unsigned_upper_bound: decrement num_sources_left before recursing

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Otherwise, search_phi_bcsel() will be called with a buf_size that is
slightly lower than it has to be.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7748>
This commit is contained in:
Rhys Perry 2020-11-24 14:53:04 +00:00
parent 65fbae16e3
commit 2a1238f3a3
1 changed files with 2 additions and 1 deletions
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3
src/compiler/nir/nir_range_analysis.c
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@ -1116,11 +1116,12 @@ search_phi_bcsel(nir_ssa_scalar scalar, nir_ssa_scalar *buf, unsigned buf_size,
if (buf_size >= num_sources_left) {
unsigned total_added = 0;
nir_foreach_phi_src(src, phi) {
num_sources_left--;
unsigned added = search_phi_bcsel(
(nir_ssa_scalar){src->src.ssa, 0}, buf + total_added, buf_size - num_sources_left, visited);
assert(added <= buf_size);
buf_size -= added;
total_added += added;
num_sources_left--;
}
return total_added;
}