nir: Remove old-school deref chain support

Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Acked-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

1 files changed, 0 insertions, 278 deletions

diff --git a/src/compiler/nir/nir_deref.c b/src/compiler/nir/nir_deref.c
index 4e48f2b2da8..1a00157c2fc 100644
--- a/src/compiler/nir/nir_deref.c
+++ b/src/compiler/nir/nir_deref.c
@@ -134,284 +134,6 @@ nir_remove_dead_derefs(nir_shader *shader)
    return progress;
 }
 
-nir_deref_var *
-nir_deref_instr_to_deref(nir_deref_instr *instr, void *mem_ctx)
-{
-   nir_deref *deref = NULL;
-
-   while (instr->deref_type != nir_deref_type_var) {
-      nir_deref *nderef;
-      switch (instr->deref_type) {
-      case nir_deref_type_array:
-      case nir_deref_type_array_wildcard: {
-         nir_deref_array *deref_arr = nir_deref_array_create(mem_ctx);
-         if (instr->deref_type == nir_deref_type_array) {
-            nir_const_value *const_index =
-               nir_src_as_const_value(instr->arr.index);
-            if (const_index) {
-               deref_arr->deref_array_type = nir_deref_array_type_direct;
-               deref_arr->base_offset = const_index->u32[0];
-            } else {
-               deref_arr->deref_array_type = nir_deref_array_type_indirect;
-               deref_arr->base_offset = 0;
-               nir_src_copy(&deref_arr->indirect, &instr->arr.index, mem_ctx);
-            }
-         } else {
-            deref_arr->deref_array_type = nir_deref_array_type_wildcard;
-         }
-         nderef = &deref_arr->deref;
-         break;
-      }
-
-      case nir_deref_type_struct:
-         nderef = &nir_deref_struct_create(mem_ctx, instr->strct.index)->deref;
-         break;
-
-      default:
-         unreachable("Invalid deref instruction type");
-      }
-
-      nderef->child = deref;
-      ralloc_steal(nderef, deref);
-      nderef->type = instr->type;
-
-      deref = nderef;
-      assert(instr->parent.is_ssa);
-      instr = nir_src_as_deref(instr->parent);
-   }
-
-   assert(instr->deref_type == nir_deref_type_var);
-   nir_deref_var *deref_var = nir_deref_var_create(mem_ctx, instr->var);
-   deref_var->deref.child = deref;
-   ralloc_steal(deref_var, deref);
-
-   return deref_var;
-}
-
-static nir_deref_var *
-nir_deref_src_to_deref(nir_src src, void *mem_ctx)
-{
-   return nir_deref_instr_to_deref(nir_src_as_deref(src), mem_ctx);
-}
-
-static bool
-nir_lower_deref_instrs_tex(nir_tex_instr *tex)
-{
-   bool progress = false;
-
-   /* Remove the instruction before we modify it.  This way we won't mess up
-    * use-def chains when we move sources around.
-    */
-   nir_cursor cursor = nir_instr_remove(&tex->instr);
-
-   unsigned new_num_srcs = 0;
-   for (unsigned i = 0; i < tex->num_srcs; i++) {
-      if (tex->src[i].src_type == nir_tex_src_texture_deref) {
-         tex->texture = nir_deref_src_to_deref(tex->src[i].src, tex);
-         progress = true;
-         continue;
-      } else if (tex->src[i].src_type == nir_tex_src_sampler_deref) {
-         tex->sampler = nir_deref_src_to_deref(tex->src[i].src, tex);
-         progress = true;
-         continue;
-      }
-
-      /* Compact the sources down to remove the deref sources */
-      assert(new_num_srcs <= i);
-      tex->src[new_num_srcs++] = tex->src[i];
-   }
-   tex->num_srcs = new_num_srcs;
-
-   nir_instr_insert(cursor, &tex->instr);
-
-   return progress;
-}
-
-static bool
-nir_lower_deref_instrs_intrin(nir_intrinsic_instr *intrin,
-                              enum nir_lower_deref_flags flags)
-{
-   nir_intrinsic_op deref_op = intrin->intrinsic;
-   nir_intrinsic_op var_op;
-
-   switch (deref_op) {
-#define CASE(a) \
-   case nir_intrinsic_##a##_deref: \
-      if (!(flags & nir_lower_load_store_derefs)) \
-         return false; \
-      var_op = nir_intrinsic_##a##_var; \
-      break;
-   CASE(load)
-   CASE(store)
-   CASE(copy)
-#undef CASE
-
-#define CASE(a) \
-   case nir_intrinsic_interp_deref_##a: \
-      if (!(flags & nir_lower_interp_derefs)) \
-         return false; \
-      var_op = nir_intrinsic_interp_var_##a; \
-      break;
-   CASE(at_centroid)
-   CASE(at_sample)
-   CASE(at_offset)
-#undef CASE
-
-#define CASE(a) \
-   case nir_intrinsic_atomic_counter_##a##_deref: \
-      if (!(flags & nir_lower_atomic_counter_derefs)) \
-         return false; \
-      var_op = nir_intrinsic_atomic_counter_##a##_var; \
-      break;
-   CASE(inc)
-   CASE(dec)
-   CASE(read)
-   CASE(add)
-   CASE(min)
-   CASE(max)
-   CASE(and)
-   CASE(or)
-   CASE(xor)
-   CASE(exchange)
-   CASE(comp_swap)
-#undef CASE
-
-#define CASE(a) \
-   case nir_intrinsic_deref_atomic_##a: \
-      if (!(flags & nir_lower_atomic_derefs)) \
-         return false; \
-      var_op = nir_intrinsic_var_atomic_##a; \
-      break;
-   CASE(add)
-   CASE(imin)
-   CASE(umin)
-   CASE(imax)
-   CASE(umax)
-   CASE(and)
-   CASE(or)
-   CASE(xor)
-   CASE(exchange)
-   CASE(comp_swap)
-#undef CASE
-
-#define CASE(a) \
-   case nir_intrinsic_image_deref_##a: \
-      if (!(flags & nir_lower_image_derefs)) \
-         return false; \
-      var_op = nir_intrinsic_image_var_##a; \
-      break;
-   CASE(load)
-   CASE(store)
-   CASE(atomic_add)
-   CASE(atomic_min)
-   CASE(atomic_max)
-   CASE(atomic_and)
-   CASE(atomic_or)
-   CASE(atomic_xor)
-   CASE(atomic_exchange)
-   CASE(atomic_comp_swap)
-   CASE(size)
-   CASE(samples)
-#undef CASE
-
-   default:
-      return false;
-   }
-
-   /* Remove the instruction before we modify it.  This way we won't mess up
-    * use-def chains when we move sources around.
-    */
-   nir_cursor cursor = nir_instr_remove(&intrin->instr);
-
-   unsigned num_derefs = nir_intrinsic_infos[var_op].num_variables;
-   assert(nir_intrinsic_infos[var_op].num_srcs + num_derefs ==
-          nir_intrinsic_infos[deref_op].num_srcs);
-
-   /* Move deref sources to variables */
-   for (unsigned i = 0; i < num_derefs; i++)
-      intrin->variables[i] = nir_deref_src_to_deref(intrin->src[i], intrin);
-
-   /* Shift all the other sources down */
-   for (unsigned i = 0; i < nir_intrinsic_infos[var_op].num_srcs; i++)
-      nir_src_copy(&intrin->src[i], &intrin->src[i + num_derefs], intrin);
-
-   /* Rewrite the extra sources to NIR_SRC_INIT just in case */
-   for (unsigned i = 0; i < num_derefs; i++)
-      intrin->src[nir_intrinsic_infos[var_op].num_srcs + i] = NIR_SRC_INIT;
-
-   /* It's safe to just stomp the intrinsic to var intrinsic since every
-    * intrinsic has room for some variables and the number of sources only
-    * shrinks.
-    */
-   intrin->intrinsic = var_op;
-
-   nir_instr_insert(cursor, &intrin->instr);
-
-   return true;
-}
-
-static bool
-nir_lower_deref_instrs_impl(nir_function_impl *impl,
-                            enum nir_lower_deref_flags flags)
-{
-   bool progress = false;
-
-   /* Walk the instructions in reverse order so that we can safely clean up
-    * the deref instructions after we clean up their uses.
-    */
-   nir_foreach_block_reverse(block, impl) {
-      nir_foreach_instr_reverse_safe(instr, block) {
-         switch (instr->type) {
-         case nir_instr_type_deref:
-            if (list_empty(&nir_instr_as_deref(instr)->dest.ssa.uses)) {
-               nir_instr_remove(instr);
-               progress = true;
-            }
-            break;
-
-         case nir_instr_type_tex:
-            if (flags & nir_lower_texture_derefs)
-               progress |= nir_lower_deref_instrs_tex(nir_instr_as_tex(instr));
-            break;
-
-         case nir_instr_type_intrinsic:
-            progress |=
-               nir_lower_deref_instrs_intrin(nir_instr_as_intrinsic(instr),
-                                             flags);
-            break;
-
-         default:
-            break; /* Nothing to do */
-         }
-      }
-   }
-
-   if (progress) {
-      nir_metadata_preserve(impl, nir_metadata_block_index |
-                                  nir_metadata_dominance);
-   }
-
-   return progress;
-}
-
-bool
-nir_lower_deref_instrs(nir_shader *shader,
-                       enum nir_lower_deref_flags flags)
-{
-   bool progress = false;
-
-   nir_foreach_function(function, shader) {
-      if (!function->impl)
-         continue;
-
-      progress |= nir_lower_deref_instrs_impl(function->impl, flags);
-   }
-
-   shader->lowered_derefs |= flags;
-
-   return progress;
-}
-
 void
 nir_fixup_deref_modes(nir_shader *shader)
 {