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nir/opt_varyings: use per instruction nan flag for promoting to flat

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Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39026>
This commit is contained in:
Georg Lehmann 2025-12-18 20:03:45 +01:00 • committed by Marge Bot
parent 4f5a29ec32
commit 6e67267045
1 changed files with 14 additions and 6 deletions
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20
src/compiler/nir/nir_opt_varyings.c
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@ -1017,11 +1017,20 @@ get_interp_vec4_type(struct linkage_info *linkage, unsigned slot,
}
static bool
preserve_nans(nir_shader *nir, unsigned bit_size)
uses_preserve_nans(nir_def *def)
{
unsigned mode = nir->info.float_controls_execution_mode;
nir_foreach_use_including_if(use, def) {
if (nir_src_is_if(use))
return true;
if (!nir_src_is_alu(*use))
return true;
return nir_is_float_control_nan_preserve(mode, bit_size);
nir_alu_instr *alu = nir_src_as_alu(*use);
if (nir_alu_instr_is_nan_preserve(alu))
return true;
}
return false;
}
static nir_def *
@ -2512,7 +2521,7 @@ propagate_uniform_expressions(struct linkage_info *linkage,
* convert Infs to NaNs manually.
*/
if (loadi->intrinsic == nir_intrinsic_load_interpolated_input &&
preserve_nans(b->shader, clone->bit_size))
uses_preserve_nans(&loadi->def))
clone = build_convert_inf_to_nan(b, clone);
/* Replace the original load. */
@ -4295,8 +4304,7 @@ relocate_slot(struct linkage_info *linkage, struct scalar_slot *slot,
* we need to convert Infs to NaNs manually in the producer to
* preserve that.
*/
if (preserve_nans(linkage->consumer_builder.shader,
load->bit_size)) {
if (uses_preserve_nans(load)) {
list_for_each_entry(struct list_node, iter,
&slot->producer.stores, head) {
nir_intrinsic_instr *store = iter->instr;