--- /dev/null
+/*
+ * Copyright © 2020 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.
+ */
+
+#include "compiler/nir/nir_builder.h"
+#include "brw_nir.h"
+
+/**
+ * GEN:BUG:1806565034:
+ *
+ * Gen12+ allows to set RENDER_SURFACE_STATE::SurfaceArray to 1 only if
+ * array_len > 1. Setting RENDER_SURFACE_STATE::SurfaceArray to 0 results in
+ * the HW RESINFO message to report an array size of 0 which breaks texture
+ * array size queries.
+ *
+ * This NIR pass works around this by patching the array size with a
+ * MAX(array_size, 1) for array textures.
+ */
+
+bool
+brw_nir_clamp_image_1d_2d_array_sizes(nir_shader *shader)
+{
+ bool progress = false;
+ nir_builder b;
+
+ nir_foreach_function(func, shader) {
+ bool function_progress = false;
+
+ if (!func->impl)
+ continue;
+
+ nir_builder_init(&b, func->impl);
+
+ nir_foreach_block(block, func->impl) {
+ nir_foreach_instr_safe(instr, block) {
+ nir_ssa_def *image_size = NULL;
+
+ switch (instr->type) {
+ case nir_instr_type_intrinsic: {
+ nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
+
+ switch (intr->intrinsic) {
+ case nir_intrinsic_image_size:
+ case nir_intrinsic_bindless_image_size:
+ if (!nir_intrinsic_image_array(intr))
+ break;
+
+ image_size = &intr->dest.ssa;
+ break;
+
+ case nir_intrinsic_image_deref_size: {
+ nir_deref_instr *deref = nir_src_as_deref(intr->src[0]);
+
+ assert(glsl_type_is_image(deref->type));
+
+ if (!glsl_sampler_type_is_array(deref->type))
+ break;
+
+ image_size = &intr->dest.ssa;
+ break;
+ }
+
+ default:
+ break;
+ }
+ break;
+ }
+
+ case nir_instr_type_tex: {
+ nir_tex_instr *tex_instr = nir_instr_as_tex(instr);
+ if (tex_instr->op != nir_texop_txs)
+ break;
+
+ if (!tex_instr->is_array)
+ break;
+
+ image_size = &tex_instr->dest.ssa;
+ break;
+ }
+
+ default:
+ break;
+ }
+
+ if (!image_size)
+ continue;
+
+ b.cursor = nir_after_instr(instr);
+
+ nir_ssa_def *components[4];
+ for (int i = 0; i < image_size->num_components; i++) {
+ if (i == (image_size->num_components - 1)) {
+ components[i] = nir_imax(&b, nir_channel(&b, image_size, i),
+ nir_imm_int(&b, 1));
+ } else {
+ components[i] = nir_channel(&b, image_size, i);
+ }
+ }
+ nir_ssa_def *image_size_replacement =
+ nir_vec(&b, components, image_size->num_components);
+
+ b.cursor = nir_after_instr(instr);
+
+ nir_ssa_def_rewrite_uses_after(image_size,
+ nir_src_for_ssa(image_size_replacement),
+ image_size_replacement->parent_instr);
+
+ function_progress = true;
+ }
+ }
+
+ if (function_progress) {
+ nir_metadata_preserve(func->impl, nir_metadata_block_index |
+ nir_metadata_dominance);
+ progress = function_progress;
+ }
+ }
+
+ return progress;
+}
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