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brw: Use io_sem.location instead of base to get varying slots

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Alyssa noted we can be using semantic IO here rather than relying on
bases not having been remapped.

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38482>
This commit is contained in:
Kenneth Graunke 2025-11-17 13:06:11 -08:00 • committed by Marge Bot
parent 96d331766a
commit 13acc889af
1 changed files with 3 additions and 2 deletions
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5
src/intel/compiler/brw/brw_nir.c
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@ -440,7 +440,7 @@ remap_patch_urb_offsets_instr(nir_builder *b, nir_intrinsic_instr *intrin, void
io_sem.location == VARYING_SLOT_TESS_LEVEL_OUTER))
return false;
gl_varying_slot varying = nir_intrinsic_base(intrin);
gl_varying_slot varying = io_sem.location;
int vue_slot = vue_map->varying_to_slot[varying];
assert(vue_slot != -1);
@ -739,7 +739,8 @@ brw_nir_lower_vue_inputs(nir_shader *nir,
* VARYING_SLOT_LAYER [.y], VARYING_SLOT_VIEWPORT [.z], and
* VARYING_SLOT_PSIZ [.w].
*/
int varying = nir_intrinsic_base(intrin);
nir_io_semantics io_sem = nir_intrinsic_io_semantics(intrin);
gl_varying_slot varying = io_sem.location;
int vue_slot;
switch (varying) {
case VARYING_SLOT_PSIZ: