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intel/compiler: add a new pass to lower shading rate into HW format

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Rework:
 * Jason: Modernize brw_nir_lower_shading_rate_output:
   1. Use nir_shader_instructions_pass()
   2. Use *_imm builder helpers.
   3. Use nir_intrinsic_base() instead of ->const_index[0]

v2: Also lower loads (Caio)

v3: Update stage check to trigger lowering (Caio)

v4: Assert on != MESH (Caio)

v5: Fixup instruction insertion (Caio)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13739>
This commit is contained in:
Lionel Landwerlin
2021-02-17 13:47:36 +02:00
committed by Marge Bot
parent e227bb9fd5
commit cebf284ac1
5 changed files with 130 additions and 0 deletions
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3
src/intel/compiler/brw_nir.c
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@@ -1110,6 +1110,9 @@ brw_postprocess_nir(nir_shader *nir, const struct brw_compiler *compiler,
OPT(nir_lower_idiv, &options);
}
if (gl_shader_stage_can_set_fragment_shading_rate(nir->info.stage))
brw_nir_lower_shading_rate_output(nir);
brw_nir_optimize(nir, compiler, is_scalar, false);
if (is_scalar && nir_shader_has_local_variables(nir)) {