glsl: Remove lower_offset_arrays pass

It is no longer used.

Reviewed-by: Qiang Yu <yuq825@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16547>

src/compiler/glsl/ir_optimization.h

@@ -118,7 +118,6 @@ bool lower_vector_insert(exec_list *instructions, bool lower_nonconstant_index);
 bool lower_vector_derefs(gl_linked_shader *shader);
 void lower_named_interface_blocks(void *mem_ctx, gl_linked_shader *shader);
 bool optimize_split_arrays(exec_list *instructions, bool linked);
-bool lower_offset_arrays(exec_list *instructions);
 void optimize_dead_builtin_variables(exec_list *instructions,
                                      enum ir_variable_mode other);
 bool lower_tess_level(gl_linked_shader *shader);

src/compiler/glsl/lower_offset_array.cpp

@@ -1,91 +0,0 @@
-/*
- * Copyright © 2013 Intel Corporation
- *
- * 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
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS 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.
- */
-
-/**
- * \file lower_offset_array.cpp
- *
- * IR lower pass to decompose ir_texture ir_tg4 with an array of offsets
- * into four ir_tg4s with a single ivec2 offset, select the .w component of each,
- * and return those four values packed into a gvec4.
- *
- * \author Chris Forbes <chrisf@ijw.co.nz>
- */
-
-#include "compiler/glsl_types.h"
-#include "ir.h"
-#include "ir_builder.h"
-#include "ir_optimization.h"
-#include "ir_rvalue_visitor.h"
-
-using namespace ir_builder;
-
-class lower_offset_array_visitor : public ir_rvalue_visitor {
-public:
-   lower_offset_array_visitor()
-   {
-      progress = false;
-   }
-
-   void handle_rvalue(ir_rvalue **rv);
-
-   bool progress;
-};
-
-void
-lower_offset_array_visitor::handle_rvalue(ir_rvalue **rv)
-{
-   if (*rv == NULL || (*rv)->ir_type != ir_type_texture)
-      return;
-
-   ir_texture *ir = (ir_texture *) *rv;
-   if (ir->op != ir_tg4 || !ir->offset || !ir->offset->type->is_array())
-      return;
-
-   void *mem_ctx = ralloc_parent(ir);
-
-   ir_variable *var =
-      new (mem_ctx) ir_variable(ir->type, "result", ir_var_temporary);
-   base_ir->insert_before(var);
-
-   for (int i = 0; i < 4; i++) {
-      ir_texture *tex = ir->clone(mem_ctx, NULL);
-      tex->offset = new (mem_ctx) ir_dereference_array(tex->offset,
-            new (mem_ctx) ir_constant(i));
-
-      base_ir->insert_before(assign(var, swizzle_w(tex), 1 << i));
-   }
-
-   *rv = new (mem_ctx) ir_dereference_variable(var);
-
-   progress = true;
-}
-
-bool
-lower_offset_arrays(exec_list *instructions)
-{
-   lower_offset_array_visitor v;
-
-   visit_list_elements(&v, instructions);
-
-   return v.progress;
-}

src/compiler/glsl/meson.build

@@ -164,7 +164,6 @@ files_libglsl = files(
   'lower_int64.cpp',
   'lower_jumps.cpp',
   'lower_mat_op_to_vec.cpp',
-  'lower_offset_array.cpp',
   'lower_named_interface_blocks.cpp',
   'lower_packing_builtins.cpp',
   'lower_precision.cpp',