nir: Move nir_lower_uniforms_to_ubo to compiler/nir.

The nir_lower_uniforms_to_ubo function is useful outside of
mesa/state_tracker, and in fact is needed to produce NIR for
drivers that have the PIPE_CAP_PACKED_UNIFORMS capability.

Signed-Off-By: Timur Kristóf <[email protected]>
Tested-by: Andre Heider <[email protected]>
Tested-by: Rob Clark <[email protected]>
Reviewed-by: Timothy Arceri <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>

4 files changed, 2 insertions, 103 deletions

diff --git a/src/mesa/state_tracker/st_glsl_to_nir.cpp b/src/mesa/state_tracker/st_glsl_to_nir.cpp
index a1e3b6233c6..84638fd88a5 100644
--- a/src/mesa/state_tracker/st_glsl_to_nir.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_nir.cpp
@@ -991,7 +991,7 @@ st_finalize_nir(struct st_context *st, struct gl_program *prog,
    if (st->ctx->Const.PackedDriverUniformStorage) {
       NIR_PASS_V(nir, nir_lower_io, nir_var_uniform, st_glsl_type_dword_size,
                  (nir_lower_io_options)0);
-      NIR_PASS_V(nir, st_nir_lower_uniforms_to_ubo);
+      NIR_PASS_V(nir, nir_lower_uniforms_to_ubo);
    }
 
    st_nir_lower_samplers(screen, nir, shader_program, prog);
diff --git a/src/mesa/state_tracker/st_nir.h b/src/mesa/state_tracker/st_nir.h
index d45ab3c4474..94eae84402e 100644
--- a/src/mesa/state_tracker/st_nir.h
+++ b/src/mesa/state_tracker/st_nir.h
@@ -36,7 +36,6 @@ struct nir_shader;
 void st_nir_lower_builtin(struct nir_shader *shader);
 void st_nir_lower_tex_src_plane(struct nir_shader *shader, unsigned free_slots,
                                 unsigned lower_2plane, unsigned lower_3plane);
-bool st_nir_lower_uniforms_to_ubo(struct nir_shader *shader);
 
 void st_nir_lower_wpos_ytransform(struct nir_shader *nir,
                                   struct gl_program *prog,
diff --git a/src/mesa/state_tracker/st_nir_builtins.c b/src/mesa/state_tracker/st_nir_builtins.c
index 3826d96a888..ce00b5e1671 100644
--- a/src/mesa/state_tracker/st_nir_builtins.c
+++ b/src/mesa/state_tracker/st_nir_builtins.c
@@ -66,7 +66,7 @@ st_nir_finish_builtin_shader(struct st_context *st,
    if (st->ctx->Const.PackedDriverUniformStorage) {
       NIR_PASS_V(nir, nir_lower_io, nir_var_uniform, st_glsl_type_dword_size,
                  (nir_lower_io_options)0);
-      NIR_PASS_V(nir, st_nir_lower_uniforms_to_ubo);
+      NIR_PASS_V(nir, nir_lower_uniforms_to_ubo);
    }
 
    struct pipe_shader_state state = {
diff --git a/src/mesa/state_tracker/st_nir_lower_uniforms_to_ubo.c b/src/mesa/state_tracker/st_nir_lower_uniforms_to_ubo.c
deleted file mode 100644
index 1727f8214a0..00000000000
--- a/src/mesa/state_tracker/st_nir_lower_uniforms_to_ubo.c
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * Copyright 2017 Advanced Micro Devices, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * on the rights to use, copy, modify, merge, publish, distribute, sub
- * license, and/or sell copies of the Software, and to permit persons to whom
- * the Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
- * USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-/*
- * Remap load_uniform intrinsics to UBO accesses of UBO binding point 0. Both
- * the base and the offset are interpreted as 16-byte units.
- *
- * Simultaneously, remap existing UBO accesses by increasing their binding
- * point by 1.
- */
-
-#include "compiler/nir/nir.h"
-#include "compiler/nir/nir_builder.h"
-#include "st_nir.h"
-
-#include "program/prog_parameter.h"
-
-static bool
-lower_instr(nir_intrinsic_instr *instr, nir_builder *b)
-{
-   b->cursor = nir_before_instr(&instr->instr);
-
-   if (instr->intrinsic == nir_intrinsic_load_ubo) {
-      nir_ssa_def *old_idx = nir_ssa_for_src(b, instr->src[0], 1);
-      nir_ssa_def *new_idx = nir_iadd(b, old_idx, nir_imm_int(b, 1));
-      nir_instr_rewrite_src(&instr->instr, &instr->src[0],
-                            nir_src_for_ssa(new_idx));
-      return true;
-   }
-
-   if (instr->intrinsic == nir_intrinsic_load_uniform) {
-      nir_ssa_def *ubo_idx = nir_imm_int(b, 0);
-      nir_ssa_def *ubo_offset =
-         nir_iadd(b, nir_imm_int(b, 4 * nir_intrinsic_base(instr)),
-                  nir_imul(b, nir_imm_int(b, 4),
-                           nir_ssa_for_src(b, instr->src[0], 1)));
-
-      nir_intrinsic_instr *load =
-         nir_intrinsic_instr_create(b->shader, nir_intrinsic_load_ubo);
-      load->num_components = instr->num_components;
-      load->src[0] = nir_src_for_ssa(ubo_idx);
-      load->src[1] = nir_src_for_ssa(ubo_offset);
-      nir_ssa_dest_init(&load->instr, &load->dest,
-                        load->num_components, instr->dest.ssa.bit_size,
-                        instr->dest.ssa.name);
-      nir_builder_instr_insert(b, &load->instr);
-      nir_ssa_def_rewrite_uses(&instr->dest.ssa, nir_src_for_ssa(&load->dest.ssa));
-
-      nir_instr_remove(&instr->instr);
-      return true;
-   }
-
-   return false;
-}
-
-bool
-st_nir_lower_uniforms_to_ubo(nir_shader *shader)
-{
-   bool progress = false;
-
-   nir_foreach_function(function, shader) {
-      if (function->impl) {
-         nir_builder builder;
-         nir_builder_init(&builder, function->impl);
-         nir_foreach_block(block, function->impl) {
-            nir_foreach_instr_safe(instr, block) {
-               if (instr->type == nir_instr_type_intrinsic)
-                  progress |= lower_instr(nir_instr_as_intrinsic(instr),
-                                          &builder);
-            }
-         }
-
-         nir_metadata_preserve(function->impl, nir_metadata_block_index |
-                                               nir_metadata_dominance);
-      }
-   }
-
-   return progress;
-}
-