nir: Remove deref chain support from lower_atomics

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>

diff --git a/src/compiler/glsl/gl_nir_lower_atomics.c b/src/compiler/glsl/gl_nir_lower_atomics.c
index 4d1add47d2908c202b1a6f028f0813ed1b4b2471..25b2ec82ed3fc1f3838c75ceaa4827651ab21063 100644 (file)
--- a/src/compiler/glsl/gl_nir_lower_atomics.c
+++ b/src/compiler/glsl/gl_nir_lower_atomics.c
@@ -38,146 +38,6 @@
  * that directly store the buffer index and byte offset
  */
 
-static bool
-lower_var_instr(nir_intrinsic_instr *instr,
-                const struct gl_shader_program *shader_program,
-                nir_shader *shader, bool use_binding_as_idx)
-{
-   nir_intrinsic_op op;
-   switch (instr->intrinsic) {
-   case nir_intrinsic_atomic_counter_read_var:
-      op = nir_intrinsic_atomic_counter_read;
-      break;
-
-   case nir_intrinsic_atomic_counter_inc_var:
-      op = nir_intrinsic_atomic_counter_inc;
-      break;
-
-   case nir_intrinsic_atomic_counter_dec_var:
-      op = nir_intrinsic_atomic_counter_dec;
-      break;
-
-   case nir_intrinsic_atomic_counter_add_var:
-      op = nir_intrinsic_atomic_counter_add;
-      break;
-
-   case nir_intrinsic_atomic_counter_min_var:
-      op = nir_intrinsic_atomic_counter_min;
-      break;
-
-   case nir_intrinsic_atomic_counter_max_var:
-      op = nir_intrinsic_atomic_counter_max;
-      break;
-
-   case nir_intrinsic_atomic_counter_and_var:
-      op = nir_intrinsic_atomic_counter_and;
-      break;
-
-   case nir_intrinsic_atomic_counter_or_var:
-      op = nir_intrinsic_atomic_counter_or;
-      break;
-
-   case nir_intrinsic_atomic_counter_xor_var:
-      op = nir_intrinsic_atomic_counter_xor;
-      break;
-
-   case nir_intrinsic_atomic_counter_exchange_var:
-      op = nir_intrinsic_atomic_counter_exchange;
-      break;
-
-   case nir_intrinsic_atomic_counter_comp_swap_var:
-      op = nir_intrinsic_atomic_counter_comp_swap;
-      break;
-
-   default:
-      return false;
-   }
-
-   if (instr->variables[0]->var->data.mode != nir_var_uniform &&
-       instr->variables[0]->var->data.mode != nir_var_shader_storage &&
-       instr->variables[0]->var->data.mode != nir_var_shared)
-      return false; /* atomics passed as function arguments can't be lowered */
-
-   void *mem_ctx = ralloc_parent(instr);
-   unsigned uniform_loc = instr->variables[0]->var->data.location;
-
-   unsigned idx = use_binding_as_idx ?
-      instr->variables[0]->var->data.binding :
-      shader_program->data->UniformStorage[uniform_loc].opaque[shader->info.stage].index;
-
-   nir_intrinsic_instr *new_instr = nir_intrinsic_instr_create(mem_ctx, op);
-   nir_intrinsic_set_base(new_instr, idx);
-
-   nir_load_const_instr *offset_const =
-      nir_load_const_instr_create(mem_ctx, 1, 32);
-   offset_const->value.u32[0] = instr->variables[0]->var->data.offset;
-
-   nir_instr_insert_before(&instr->instr, &offset_const->instr);
-
-   nir_ssa_def *offset_def = &offset_const->def;
-
-   nir_deref *tail = &instr->variables[0]->deref;
-   while (tail->child != NULL) {
-      nir_deref_array *deref_array = nir_deref_as_array(tail->child);
-      tail = tail->child;
-
-      unsigned child_array_elements = tail->child != NULL ?
-         glsl_get_aoa_size(tail->type) : 1;
-
-      offset_const->value.u32[0] += deref_array->base_offset *
-         child_array_elements * ATOMIC_COUNTER_SIZE;
-
-      if (deref_array->deref_array_type == nir_deref_array_type_indirect) {
-         nir_load_const_instr *atomic_counter_size =
-            nir_load_const_instr_create(mem_ctx, 1, 32);
-         atomic_counter_size->value.u32[0] = child_array_elements * ATOMIC_COUNTER_SIZE;
-         nir_instr_insert_before(&instr->instr, &atomic_counter_size->instr);
-
-         nir_alu_instr *mul = nir_alu_instr_create(mem_ctx, nir_op_imul);
-         nir_ssa_dest_init(&mul->instr, &mul->dest.dest, 1, 32, NULL);
-         mul->dest.write_mask = 0x1;
-         nir_src_copy(&mul->src[0].src, &deref_array->indirect, mul);
-         mul->src[1].src.is_ssa = true;
-         mul->src[1].src.ssa = &atomic_counter_size->def;
-         nir_instr_insert_before(&instr->instr, &mul->instr);
-
-         nir_alu_instr *add = nir_alu_instr_create(mem_ctx, nir_op_iadd);
-         nir_ssa_dest_init(&add->instr, &add->dest.dest, 1, 32, NULL);
-         add->dest.write_mask = 0x1;
-         add->src[0].src.is_ssa = true;
-         add->src[0].src.ssa = &mul->dest.dest.ssa;
-         add->src[1].src.is_ssa = true;
-         add->src[1].src.ssa = offset_def;
-         nir_instr_insert_before(&instr->instr, &add->instr);
-
-         offset_def = &add->dest.dest.ssa;
-      }
-   }
-
-   new_instr->src[0].is_ssa = true;
-   new_instr->src[0].ssa = offset_def;
-
-   /* Copy the other sources, if any, from the original instruction to the new
-    * instruction.
-    */
-   for (unsigned i = 0; i < nir_intrinsic_infos[instr->intrinsic].num_srcs; i++)
-      nir_src_copy(&new_instr->src[i + 1], &instr->src[i], new_instr);
-
-   if (instr->dest.is_ssa) {
-      nir_ssa_dest_init(&new_instr->instr, &new_instr->dest,
-                        instr->dest.ssa.num_components, 32, NULL);
-      nir_ssa_def_rewrite_uses(&instr->dest.ssa,
-                               nir_src_for_ssa(&new_instr->dest.ssa));
-   } else {
-      nir_dest_copy(&new_instr->dest, &instr->dest, mem_ctx);
-   }
-
-   nir_instr_insert_before(&instr->instr, &new_instr->instr);
-   nir_instr_remove(&instr->instr);
-
-   return true;
-}
-
 static bool
 lower_deref_instr(nir_builder *b, nir_intrinsic_instr *instr,
                   const struct gl_shader_program *shader_program,
@@ -282,6 +142,8 @@ gl_nir_lower_atomics(nir_shader *shader,
 {
    bool progress = false;
 
+   nir_assert_unlowered_derefs(shader, nir_lower_atomic_counter_derefs);
+
    nir_foreach_function(function, shader) {
       if (!function->impl)
          continue;
@@ -296,10 +158,6 @@ gl_nir_lower_atomics(nir_shader *shader,
             if (instr->type != nir_instr_type_intrinsic)
                continue;
 
-            impl_progress |= lower_var_instr(nir_instr_as_intrinsic(instr),
-                                             shader_program, shader,
-                                             use_binding_as_idx);
-
             impl_progress |= lower_deref_instr(&build,
                                                nir_instr_as_intrinsic(instr),
                                                shader_program, shader,