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nir: Don't allow conflicting bitfield lowering passes

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Reviewed-by: Emma Anholt <emma@anholt.net>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20323>
This commit is contained in:
Ian Romanick 2022-12-13 11:11:13 -08:00
parent 8ab7ec0129
commit db241fbd70
1 changed files with 12 additions and 0 deletions
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12
src/compiler/nir/nir_algebraic.py
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@ -1180,6 +1180,18 @@ ${pass_name}(nir_shader *shader)
(void) options;
(void) info;
/* This is not a great place for this, but it seems to be the best place
* for it. Check that at most one kind of lowering is requested for
* bitfield extract and bitfield insert. Otherwise the lowering can fight
* with each other and optimizations.
*/
assert((int)options->lower_bitfield_extract +
(int)options->lower_bitfield_extract_to_shifts <= 1);
assert((int)options->lower_bitfield_insert +
(int)options->lower_bitfield_insert_to_shifts +
(int)options->lower_bitfield_insert_to_bitfield_select <= 1);
STATIC_ASSERT(${str(cache["next_index"])} == ARRAY_SIZE(${pass_name}_values));
% for index, condition in enumerate(condition_list):
condition_flags[${index}] = ${condition};