diff options
Diffstat (limited to 'src/compiler/nir/glsl_to_nir.cpp')
| -rw-r--r-- | src/compiler/nir/glsl_to_nir.cpp | 2031 |
1 files changed, 2031 insertions, 0 deletions
diff --git a/src/compiler/nir/glsl_to_nir.cpp b/src/compiler/nir/glsl_to_nir.cpp new file mode 100644 index 0000000..33b1f5c --- /dev/null +++ b/src/compiler/nir/glsl_to_nir.cpp @@ -0,0 +1,2031 @@ +/* + * Copyright © 2014 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. + * + * Authors: + * Connor Abbott (cwabbott0@gmail.com) + * + */ + +#include "glsl_to_nir.h" +#include "nir_control_flow.h" +#include "nir_builder.h" +#include "glsl/ir_visitor.h" +#include "glsl/ir_hierarchical_visitor.h" +#include "glsl/ir.h" +#include "main/imports.h" + +/* + * pass to lower GLSL IR to NIR + * + * This will lower variable dereferences to loads/stores of corresponding + * variables in NIR - the variables will be converted to registers in a later + * pass. + */ + +namespace { + +class nir_visitor : public ir_visitor +{ +public: + nir_visitor(nir_shader *shader); + ~nir_visitor(); + + virtual void visit(ir_variable *); + virtual void visit(ir_function *); + virtual void visit(ir_function_signature *); + virtual void visit(ir_loop *); + virtual void visit(ir_if *); + virtual void visit(ir_discard *); + virtual void visit(ir_loop_jump *); + virtual void visit(ir_return *); + virtual void visit(ir_call *); + virtual void visit(ir_assignment *); + virtual void visit(ir_emit_vertex *); + virtual void visit(ir_end_primitive *); + virtual void visit(ir_expression *); + virtual void visit(ir_swizzle *); + virtual void visit(ir_texture *); + virtual void visit(ir_constant *); + virtual void visit(ir_dereference_variable *); + virtual void visit(ir_dereference_record *); + virtual void visit(ir_dereference_array *); + virtual void visit(ir_barrier *); + + void create_function(ir_function_signature *ir); + +private: + void add_instr(nir_instr *instr, unsigned num_components); + nir_ssa_def *evaluate_rvalue(ir_rvalue *ir); + + nir_alu_instr *emit(nir_op op, unsigned dest_size, nir_ssa_def **srcs); + nir_alu_instr *emit(nir_op op, unsigned dest_size, nir_ssa_def *src1); + nir_alu_instr *emit(nir_op op, unsigned dest_size, nir_ssa_def *src1, + nir_ssa_def *src2); + nir_alu_instr *emit(nir_op op, unsigned dest_size, nir_ssa_def *src1, + nir_ssa_def *src2, nir_ssa_def *src3); + + bool supports_ints; + + nir_shader *shader; + nir_function_impl *impl; + nir_builder b; + nir_ssa_def *result; /* result of the expression tree last visited */ + + nir_deref_var *evaluate_deref(nir_instr *mem_ctx, ir_instruction *ir); + + /* the head of the dereference chain we're creating */ + nir_deref_var *deref_head; + /* the tail of the dereference chain we're creating */ + nir_deref *deref_tail; + + nir_variable *var; /* variable created by ir_variable visitor */ + + /* whether the IR we're operating on is per-function or global */ + bool is_global; + + /* map of ir_variable -> nir_variable */ + struct hash_table *var_table; + + /* map of ir_function_signature -> nir_function_overload */ + struct hash_table *overload_table; +}; + +/* + * This visitor runs before the main visitor, calling create_function() for + * each function so that the main visitor can resolve forward references in + * calls. + */ + +class nir_function_visitor : public ir_hierarchical_visitor +{ +public: + nir_function_visitor(nir_visitor *v) : visitor(v) + { + } + virtual ir_visitor_status visit_enter(ir_function *); + +private: + nir_visitor *visitor; +}; + +}; /* end of anonymous namespace */ + +nir_shader * +glsl_to_nir(const struct gl_shader_program *shader_prog, + gl_shader_stage stage, + const nir_shader_compiler_options *options) +{ + struct gl_shader *sh = shader_prog->_LinkedShaders[stage]; + + nir_shader *shader = nir_shader_create(NULL, stage, options); + + nir_visitor v1(shader); + nir_function_visitor v2(&v1); + v2.run(sh->ir); + visit_exec_list(sh->ir, &v1); + + nir_lower_outputs_to_temporaries(shader); + + shader->info.name = ralloc_asprintf(shader, "GLSL%d", shader_prog->Name); + if (shader_prog->Label) + shader->info.label = ralloc_strdup(shader, shader_prog->Label); + shader->info.num_textures = _mesa_fls(sh->Program->SamplersUsed); + shader->info.num_ubos = sh->NumUniformBlocks; + shader->info.num_abos = shader_prog->NumAtomicBuffers; + shader->info.num_ssbos = sh->NumShaderStorageBlocks; + shader->info.num_images = sh->NumImages; + shader->info.inputs_read = sh->Program->InputsRead; + shader->info.outputs_written = sh->Program->OutputsWritten; + shader->info.patch_inputs_read = sh->Program->PatchInputsRead; + shader->info.patch_outputs_written = sh->Program->PatchOutputsWritten; + shader->info.system_values_read = sh->Program->SystemValuesRead; + shader->info.uses_texture_gather = sh->Program->UsesGather; + shader->info.uses_clip_distance_out = + sh->Program->ClipDistanceArraySize != 0; + shader->info.separate_shader = shader_prog->SeparateShader; + shader->info.has_transform_feedback_varyings = + shader_prog->TransformFeedback.NumVarying > 0; + + switch (stage) { + case MESA_SHADER_TESS_CTRL: + shader->info.tcs.vertices_out = shader_prog->TessCtrl.VerticesOut; + break; + + case MESA_SHADER_GEOMETRY: + shader->info.gs.vertices_in = shader_prog->Geom.VerticesIn; + shader->info.gs.output_primitive = sh->Geom.OutputType; + shader->info.gs.vertices_out = sh->Geom.VerticesOut; + shader->info.gs.invocations = sh->Geom.Invocations; + shader->info.gs.uses_end_primitive = shader_prog->Geom.UsesEndPrimitive; + shader->info.gs.uses_streams = shader_prog->Geom.UsesStreams; + break; + + case MESA_SHADER_FRAGMENT: { + struct gl_fragment_program *fp = + (struct gl_fragment_program *)sh->Program; + + shader->info.fs.uses_discard = fp->UsesKill; + shader->info.fs.early_fragment_tests = sh->EarlyFragmentTests; + shader->info.fs.depth_layout = fp->FragDepthLayout; + break; + } + + case MESA_SHADER_COMPUTE: { + struct gl_compute_program *cp = (struct gl_compute_program *)sh->Program; + shader->info.cs.local_size[0] = cp->LocalSize[0]; + shader->info.cs.local_size[1] = cp->LocalSize[1]; + shader->info.cs.local_size[2] = cp->LocalSize[2]; + break; + } + + default: + break; /* No stage-specific info */ + } + + return shader; +} + +nir_visitor::nir_visitor(nir_shader *shader) +{ + this->supports_ints = shader->options->native_integers; + this->shader = shader; + this->is_global = true; + this->var_table = _mesa_hash_table_create(NULL, _mesa_hash_pointer, + _mesa_key_pointer_equal); + this->overload_table = _mesa_hash_table_create(NULL, _mesa_hash_pointer, + _mesa_key_pointer_equal); +} + +nir_visitor::~nir_visitor() +{ + _mesa_hash_table_destroy(this->var_table, NULL); + _mesa_hash_table_destroy(this->overload_table, NULL); +} + +nir_deref_var * +nir_visitor::evaluate_deref(nir_instr *mem_ctx, ir_instruction *ir) +{ + ir->accept(this); + ralloc_steal(mem_ctx, this->deref_head); + return this->deref_head; +} + +static nir_constant * +constant_copy(ir_constant *ir, void *mem_ctx) +{ + if (ir == NULL) + return NULL; + + nir_constant *ret = ralloc(mem_ctx, nir_constant); + + unsigned total_elems = ir->type->components(); + unsigned i; + + ret->num_elements = 0; + switch (ir->type->base_type) { + case GLSL_TYPE_UINT: + for (i = 0; i < total_elems; i++) + ret->value.u[i] = ir->value.u[i]; + break; + + case GLSL_TYPE_INT: + for (i = 0; i < total_elems; i++) + ret->value.i[i] = ir->value.i[i]; + break; + + case GLSL_TYPE_FLOAT: + for (i = 0; i < total_elems; i++) + ret->value.f[i] = ir->value.f[i]; + break; + + case GLSL_TYPE_BOOL: + for (i = 0; i < total_elems; i++) + ret->value.b[i] = ir->value.b[i]; + break; + + case GLSL_TYPE_STRUCT: + ret->elements = ralloc_array(mem_ctx, nir_constant *, + ir->type->length); + ret->num_elements = ir->type->length; + + i = 0; + foreach_in_list(ir_constant, field, &ir->components) { + ret->elements[i] = constant_copy(field, mem_ctx); + i++; + } + break; + + case GLSL_TYPE_ARRAY: + ret->elements = ralloc_array(mem_ctx, nir_constant *, + ir->type->length); + ret->num_elements = ir->type->length; + + for (i = 0; i < ir->type->length; i++) + ret->elements[i] = constant_copy(ir->array_elements[i], mem_ctx); + break; + + default: + unreachable("not reached"); + } + + return ret; +} + +void +nir_visitor::visit(ir_variable *ir) +{ + nir_variable *var = ralloc(shader, nir_variable); + var->type = ir->type; + var->name = ralloc_strdup(var, ir->name); + + var->data.read_only = ir->data.read_only; + var->data.centroid = ir->data.centroid; + var->data.sample = ir->data.sample; + var->data.patch = ir->data.patch; + var->data.invariant = ir->data.invariant; + var->data.location = ir->data.location; + + switch(ir->data.mode) { + case ir_var_auto: + case ir_var_temporary: + if (is_global) + var->data.mode = nir_var_global; + else + var->data.mode = nir_var_local; + break; + + case ir_var_function_in: + case ir_var_function_out: + case ir_var_function_inout: + case ir_var_const_in: + var->data.mode = nir_var_local; + break; + + case ir_var_shader_in: + if (shader->stage == MESA_SHADER_FRAGMENT && + ir->data.location == VARYING_SLOT_FACE) { + /* For whatever reason, GLSL IR makes gl_FrontFacing an input */ + var->data.location = SYSTEM_VALUE_FRONT_FACE; + var->data.mode = nir_var_system_value; + } else if (shader->stage == MESA_SHADER_GEOMETRY && + ir->data.location == VARYING_SLOT_PRIMITIVE_ID) { + /* For whatever reason, GLSL IR makes gl_PrimitiveIDIn an input */ + var->data.location = SYSTEM_VALUE_PRIMITIVE_ID; + var->data.mode = nir_var_system_value; + } else { + var->data.mode = nir_var_shader_in; + } + break; + + case ir_var_shader_out: + var->data.mode = nir_var_shader_out; + break; + + case ir_var_uniform: + var->data.mode = nir_var_uniform; + break; + + case ir_var_shader_storage: + var->data.mode = nir_var_shader_storage; + break; + + case ir_var_system_value: + var->data.mode = nir_var_system_value; + break; + + default: + unreachable("not reached"); + } + + var->data.interpolation = ir->data.interpolation; + var->data.origin_upper_left = ir->data.origin_upper_left; + var->data.pixel_center_integer = ir->data.pixel_center_integer; + var->data.explicit_location = ir->data.explicit_location; + var->data.explicit_index = ir->data.explicit_index; + var->data.explicit_binding = ir->data.explicit_binding; + var->data.has_initializer = ir->data.has_initializer; + var->data.location_frac = ir->data.location_frac; + var->data.from_named_ifc_block_array = ir->data.from_named_ifc_block_array; + var->data.from_named_ifc_block_nonarray = ir->data.from_named_ifc_block_nonarray; + + switch (ir->data.depth_layout) { + case ir_depth_layout_none: + var->data.depth_layout = nir_depth_layout_none; + break; + case ir_depth_layout_any: + var->data.depth_layout = nir_depth_layout_any; + break; + case ir_depth_layout_greater: + var->data.depth_layout = nir_depth_layout_greater; + break; + case ir_depth_layout_less: + var->data.depth_layout = nir_depth_layout_less; + break; + case ir_depth_layout_unchanged: + var->data.depth_layout = nir_depth_layout_unchanged; + break; + default: + unreachable("not reached"); + } + + var->data.index = ir->data.index; + var->data.binding = ir->data.binding; + var->data.offset = ir->data.offset; + var->data.image.read_only = ir->data.image_read_only; + var->data.image.write_only = ir->data.image_write_only; + var->data.image.coherent = ir->data.image_coherent; + var->data.image._volatile = ir->data.image_volatile; + var->data.image.restrict_flag = ir->data.image_restrict; + var->data.image.format = ir->data.image_format; + var->data.max_array_access = ir->data.max_array_access; + + var->num_state_slots = ir->get_num_state_slots(); + if (var->num_state_slots > 0) { + var->state_slots = ralloc_array(var, nir_state_slot, + var->num_state_slots); + + ir_state_slot *state_slots = ir->get_state_slots(); + for (unsigned i = 0; i < var->num_state_slots; i++) { + for (unsigned j = 0; j < 5; j++) + var->state_slots[i].tokens[j] = state_slots[i].tokens[j]; + var->state_slots[i].swizzle = state_slots[i].swizzle; + } + } else { + var->state_slots = NULL; + } + + var->constant_initializer = constant_copy(ir->constant_initializer, var); + + var->interface_type = ir->get_interface_type(); + + if (var->data.mode == nir_var_local) + nir_function_impl_add_variable(impl, var); + else + nir_shader_add_variable(shader, var); + + _mesa_hash_table_insert(var_table, ir, var); + this->var = var; +} + +ir_visitor_status +nir_function_visitor::visit_enter(ir_function *ir) +{ + foreach_in_list(ir_function_signature, sig, &ir->signatures) { + visitor->create_function(sig); + } + return visit_continue_with_parent; +} + +void +nir_visitor::create_function(ir_function_signature *ir) +{ + if (ir->is_intrinsic) + return; + + nir_function *func = nir_function_create(shader, ir->function_name()); + + unsigned num_params = ir->parameters.length(); + func->num_params = num_params; + func->params = ralloc_array(shader, nir_parameter, num_params); + + unsigned i = 0; + foreach_in_list(ir_variable, param, &ir->parameters) { + switch (param->data.mode) { + case ir_var_function_in: + func->params[i].param_type = nir_parameter_in; + break; + + case ir_var_function_out: + func->params[i].param_type = nir_parameter_out; + break; + + case ir_var_function_inout: + func->params[i].param_type = nir_parameter_inout; + break; + + default: + unreachable("not reached"); + } + + func->params[i].type = param->type; + i++; + } + + func->return_type = ir->return_type; + + _mesa_hash_table_insert(this->overload_table, ir, func); +} + +void +nir_visitor::visit(ir_function *ir) +{ + foreach_in_list(ir_function_signature, sig, &ir->signatures) + sig->accept(this); +} + +void +nir_visitor::visit(ir_function_signature *ir) +{ + if (ir->is_intrinsic) + return; + + struct hash_entry *entry = + _mesa_hash_table_search(this->overload_table, ir); + + assert(entry); + nir_function *func = (nir_function *) entry->data; + + if (ir->is_defined) { + nir_function_impl *impl = nir_function_impl_create(func); + this->impl = impl; + + unsigned num_params = func->num_params; + impl->num_params = num_params; + impl->params = ralloc_array(this->shader, nir_variable *, num_params); + unsigned i = 0; + foreach_in_list(ir_variable, param, &ir->parameters) { + param->accept(this); + impl->params[i] = this->var; + i++; + } + + if (func->return_type == glsl_type::void_type) { + impl->return_var = NULL; + } else { + impl->return_var = ralloc(this->shader, nir_variable); + impl->return_var->name = ralloc_strdup(impl->return_var, + "return_var"); + impl->return_var->type = func->return_type; + } + + this->is_global = false; + + nir_builder_init(&b, impl); + b.cursor = nir_after_cf_list(&impl->body); + visit_exec_list(&ir->body, this); + + this->is_global = true; + } else { + func->impl = NULL; + } +} + +void +nir_visitor::visit(ir_loop *ir) +{ + nir_loop *loop = nir_loop_create(this->shader); + nir_builder_cf_insert(&b, &loop->cf_node); + + b.cursor = nir_after_cf_list(&loop->body); + visit_exec_list(&ir->body_instructions, this); + b.cursor = nir_after_cf_node(&loop->cf_node); +} + +void +nir_visitor::visit(ir_if *ir) +{ + nir_src condition = + nir_src_for_ssa(evaluate_rvalue(ir->condition)); + + nir_if *if_stmt = nir_if_create(this->shader); + if_stmt->condition = condition; + nir_builder_cf_insert(&b, &if_stmt->cf_node); + + b.cursor = nir_after_cf_list(&if_stmt->then_list); + visit_exec_list(&ir->then_instructions, this); + + b.cursor = nir_after_cf_list(&if_stmt->else_list); + visit_exec_list(&ir->else_instructions, this); + + b.cursor = nir_after_cf_node(&if_stmt->cf_node); +} + +void +nir_visitor::visit(ir_discard *ir) +{ + /* + * discards aren't treated as control flow, because before we lower them + * they can appear anywhere in the shader and the stuff after them may still + * be executed (yay, crazy GLSL rules!). However, after lowering, all the + * discards will be immediately followed by a return. + */ + + nir_intrinsic_instr *discard; + if (ir->condition) { + discard = nir_intrinsic_instr_create(this->shader, + nir_intrinsic_discard_if); + discard->src[0] = + nir_src_for_ssa(evaluate_rvalue(ir->condition)); + } else { + discard = nir_intrinsic_instr_create(this->shader, nir_intrinsic_discard); + } + + nir_builder_instr_insert(&b, &discard->instr); +} + +void +nir_visitor::visit(ir_emit_vertex *ir) +{ + nir_intrinsic_instr *instr = + nir_intrinsic_instr_create(this->shader, nir_intrinsic_emit_vertex); + instr->const_index[0] = ir->stream_id(); + nir_builder_instr_insert(&b, &instr->instr); +} + +void +nir_visitor::visit(ir_end_primitive *ir) +{ + nir_intrinsic_instr *instr = + nir_intrinsic_instr_create(this->shader, nir_intrinsic_end_primitive); + instr->const_index[0] = ir->stream_id(); + nir_builder_instr_insert(&b, &instr->instr); +} + +void +nir_visitor::visit(ir_loop_jump *ir) +{ + nir_jump_type type; + switch (ir->mode) { + case ir_loop_jump::jump_break: + type = nir_jump_break; + break; + case ir_loop_jump::jump_continue: + type = nir_jump_continue; + break; + default: + unreachable("not reached"); + } + + nir_jump_instr *instr = nir_jump_instr_create(this->shader, type); + nir_builder_instr_insert(&b, &instr->instr); +} + +void +nir_visitor::visit(ir_return *ir) +{ + if (ir->value != NULL) { + nir_intrinsic_instr *copy = + nir_intrinsic_instr_create(this->shader, nir_intrinsic_copy_var); + + copy->variables[0] = nir_deref_var_create(copy, this->impl->return_var); + copy->variables[1] = evaluate_deref(©->instr, ir->value); + } + + nir_jump_instr *instr = nir_jump_instr_create(this->shader, nir_jump_return); + nir_builder_instr_insert(&b, &instr->instr); +} + +void +nir_visitor::visit(ir_call *ir) +{ + if (ir->callee->is_intrinsic) { + nir_intrinsic_op op; + if (strcmp(ir->callee_name(), "__intrinsic_atomic_read") == 0) { + op = nir_intrinsic_atomic_counter_read_var; + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_increment") == 0) { + op = nir_intrinsic_atomic_counter_inc_var; + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_predecrement") == 0) { + op = nir_intrinsic_atomic_counter_dec_var; + } else if (strcmp(ir->callee_name(), "__intrinsic_image_load") == 0) { + op = nir_intrinsic_image_load; + } else if (strcmp(ir->callee_name(), "__intrinsic_image_store") == 0) { + op = nir_intrinsic_image_store; + } else if (strcmp(ir->callee_name(), "__intrinsic_image_atomic_add") == 0) { + op = nir_intrinsic_image_atomic_add; + } else if (strcmp(ir->callee_name(), "__intrinsic_image_atomic_min") == 0) { + op = nir_intrinsic_image_atomic_min; + } else if (strcmp(ir->callee_name(), "__intrinsic_image_atomic_max") == 0) { + op = nir_intrinsic_image_atomic_max; + } else if (strcmp(ir->callee_name(), "__intrinsic_image_atomic_and") == 0) { + op = nir_intrinsic_image_atomic_and; + } else if (strcmp(ir->callee_name(), "__intrinsic_image_atomic_or") == 0) { + op = nir_intrinsic_image_atomic_or; + } else if (strcmp(ir->callee_name(), "__intrinsic_image_atomic_xor") == 0) { + op = nir_intrinsic_image_atomic_xor; + } else if (strcmp(ir->callee_name(), "__intrinsic_image_atomic_exchange") == 0) { + op = nir_intrinsic_image_atomic_exchange; + } else if (strcmp(ir->callee_name(), "__intrinsic_image_atomic_comp_swap") == 0) { + op = nir_intrinsic_image_atomic_comp_swap; + } else if (strcmp(ir->callee_name(), "__intrinsic_memory_barrier") == 0) { + op = nir_intrinsic_memory_barrier; + } else if (strcmp(ir->callee_name(), "__intrinsic_image_size") == 0) { + op = nir_intrinsic_image_size; + } else if (strcmp(ir->callee_name(), "__intrinsic_image_samples") == 0) { + op = nir_intrinsic_image_samples; + } else if (strcmp(ir->callee_name(), "__intrinsic_store_ssbo") == 0) { + op = nir_intrinsic_store_ssbo; + } else if (strcmp(ir->callee_name(), "__intrinsic_load_ssbo") == 0) { + op = nir_intrinsic_load_ssbo; + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_add_ssbo") == 0) { + op = nir_intrinsic_ssbo_atomic_add; + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_and_ssbo") == 0) { + op = nir_intrinsic_ssbo_atomic_and; + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_or_ssbo") == 0) { + op = nir_intrinsic_ssbo_atomic_or; + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_xor_ssbo") == 0) { + op = nir_intrinsic_ssbo_atomic_xor; + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_min_ssbo") == 0) { + assert(ir->return_deref); + if (ir->return_deref->type == glsl_type::int_type) + op = nir_intrinsic_ssbo_atomic_imin; + else if (ir->return_deref->type == glsl_type::uint_type) + op = nir_intrinsic_ssbo_atomic_umin; + else + unreachable("Invalid type"); + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_max_ssbo") == 0) { + assert(ir->return_deref); + if (ir->return_deref->type == glsl_type::int_type) + op = nir_intrinsic_ssbo_atomic_imax; + else if (ir->return_deref->type == glsl_type::uint_type) + op = nir_intrinsic_ssbo_atomic_umax; + else + unreachable("Invalid type"); + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_exchange_ssbo") == 0) { + op = nir_intrinsic_ssbo_atomic_exchange; + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_comp_swap_ssbo") == 0) { + op = nir_intrinsic_ssbo_atomic_comp_swap; + } else if (strcmp(ir->callee_name(), "__intrinsic_shader_clock") == 0) { + op = nir_intrinsic_shader_clock; + } else if (strcmp(ir->callee_name(), "__intrinsic_group_memory_barrier") == 0) { + op = nir_intrinsic_group_memory_barrier; + } else if (strcmp(ir->callee_name(), "__intrinsic_memory_barrier_atomic_counter") == 0) { + op = nir_intrinsic_memory_barrier_atomic_counter; + } else if (strcmp(ir->callee_name(), "__intrinsic_memory_barrier_buffer") == 0) { + op = nir_intrinsic_memory_barrier_buffer; + } else if (strcmp(ir->callee_name(), "__intrinsic_memory_barrier_image") == 0) { + op = nir_intrinsic_memory_barrier_image; + } else if (strcmp(ir->callee_name(), "__intrinsic_memory_barrier_shared") == 0) { + op = nir_intrinsic_memory_barrier_shared; + } else if (strcmp(ir->callee_name(), "__intrinsic_load_shared") == 0) { + op = nir_intrinsic_load_shared; + } else if (strcmp(ir->callee_name(), "__intrinsic_store_shared") == 0) { + op = nir_intrinsic_store_shared; + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_add_shared") == 0) { + op = nir_intrinsic_shared_atomic_add; + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_and_shared") == 0) { + op = nir_intrinsic_shared_atomic_and; + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_or_shared") == 0) { + op = nir_intrinsic_shared_atomic_or; + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_xor_shared") == 0) { + op = nir_intrinsic_shared_atomic_xor; + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_min_shared") == 0) { + assert(ir->return_deref); + if (ir->return_deref->type == glsl_type::int_type) + op = nir_intrinsic_shared_atomic_imin; + else if (ir->return_deref->type == glsl_type::uint_type) + op = nir_intrinsic_shared_atomic_umin; + else + unreachable("Invalid type"); + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_max_shared") == 0) { + assert(ir->return_deref); + if (ir->return_deref->type == glsl_type::int_type) + op = nir_intrinsic_shared_atomic_imax; + else if (ir->return_deref->type == glsl_type::uint_type) + op = nir_intrinsic_shared_atomic_umax; + else + unreachable("Invalid type"); + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_exchange_shared") == 0) { + op = nir_intrinsic_shared_atomic_exchange; + } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_comp_swap_shared") == 0) { + op = nir_intrinsic_shared_atomic_comp_swap; + } else { + unreachable("not reached"); + } + + nir_intrinsic_instr *instr = nir_intrinsic_instr_create(shader, op); + nir_dest *dest = &instr->dest; + + switch (op) { + case nir_intrinsic_atomic_counter_read_var: + case nir_intrinsic_atomic_counter_inc_var: + case nir_intrinsic_atomic_counter_dec_var: { + ir_dereference *param = + (ir_dereference *) ir->actual_parameters.get_head(); + instr->variables[0] = evaluate_deref(&instr->instr, param); + nir_ssa_dest_init(&instr->instr, &instr->dest, 1, NULL); + nir_builder_instr_insert(&b, &instr->instr); + break; + } + case nir_intrinsic_image_load: + case nir_intrinsic_image_store: + case nir_intrinsic_image_atomic_add: + case nir_intrinsic_image_atomic_min: + case nir_intrinsic_image_atomic_max: + case nir_intrinsic_image_atomic_and: + case nir_intrinsic_image_atomic_or: + case nir_intrinsic_image_atomic_xor: + case nir_intrinsic_image_atomic_exchange: + case nir_intrinsic_image_atomic_comp_swap: + case nir_intrinsic_image_samples: + case nir_intrinsic_image_size: { + nir_ssa_undef_instr *instr_undef = + nir_ssa_undef_instr_create(shader, 1); + nir_builder_instr_insert(&b, &instr_undef->instr); + + /* Set the image variable dereference. */ + exec_node *param = ir->actual_parameters.get_head(); + ir_dereference *image = (ir_dereference *)param; + const glsl_type *type = + image->variable_referenced()->type->without_array(); + + instr->variables[0] = evaluate_deref(&instr->instr, image); + param = param->get_next(); + + /* Set the intrinsic destination. */ + if (ir->return_deref) { + const nir_intrinsic_info *info = + &nir_intrinsic_infos[instr->intrinsic]; + nir_ssa_dest_init(&instr->instr, &instr->dest, + info->dest_components, NULL); + } + + if (op == nir_intrinsic_image_size || + op == nir_intrinsic_image_samples) { + nir_builder_instr_insert(&b, &instr->instr); + break; + } + + /* Set the address argument, extending the coordinate vector to four + * components. + */ + nir_ssa_def *src_addr = + evaluate_rvalue((ir_dereference *)param); + nir_ssa_def *srcs[4]; + + for (int i = 0; i < 4; i++) { + if (i < type->coordinate_components()) + srcs[i] = nir_channel(&b, src_addr, i); + else + srcs[i] = &instr_undef->def; + } + + instr->src[0] = nir_src_for_ssa(nir_vec(&b, srcs, 4)); + param = param->get_next(); + + /* Set the sample argument, which is undefined for single-sample + * images. + */ + if (type->sampler_dimensionality == GLSL_SAMPLER_DIM_MS) { + instr->src[1] = + nir_src_for_ssa(evaluate_rvalue((ir_dereference *)param)); + param = param->get_next(); + } else { + instr->src[1] = nir_src_for_ssa(&instr_undef->def); + } + + /* Set the intrinsic parameters. */ + if (!param->is_tail_sentinel()) { + instr->src[2] = + nir_src_for_ssa(evaluate_rvalue((ir_dereference *)param)); + param = param->get_next(); + } + + if (!param->is_tail_sentinel()) { + instr->src[3] = + nir_src_for_ssa(evaluate_rvalue((ir_dereference *)param)); + param = param->get_next(); + } + nir_builder_instr_insert(&b, &instr->instr); + break; + } + case nir_intrinsic_memory_barrier: + case nir_intrinsic_group_memory_barrier: + case nir_intrinsic_memory_barrier_atomic_counter: + case nir_intrinsic_memory_barrier_buffer: + case nir_intrinsic_memory_barrier_image: + case nir_intrinsic_memory_barrier_shared: + nir_builder_instr_insert(&b, &instr->instr); + break; + case nir_intrinsic_shader_clock: + nir_ssa_dest_init(&instr->instr, &instr->dest, 1, NULL); + nir_builder_instr_insert(&b, &instr->instr); + break; + case nir_intrinsic_store_ssbo: { + exec_node *param = ir->actual_parameters.get_head(); + ir_rvalue *block = ((ir_instruction *)param)->as_rvalue(); + + param = param->get_next(); + ir_rvalue *offset = ((ir_instruction *)param)->as_rvalue(); + + param = param->get_next(); + ir_rvalue *val = ((ir_instruction *)param)->as_rvalue(); + + param = param->get_next(); + ir_constant *write_mask = ((ir_instruction *)param)->as_constant(); + assert(write_mask); + + instr->src[0] = nir_src_for_ssa(evaluate_rvalue(val)); + instr->src[1] = nir_src_for_ssa(evaluate_rvalue(block)); + instr->src[2] = nir_src_for_ssa(evaluate_rvalue(offset)); + instr->const_index[0] = write_mask->value.u[0]; + instr->num_components = val->type->vector_elements; + + nir_builder_instr_insert(&b, &instr->instr); + break; + } + case nir_intrinsic_load_ssbo: { + exec_node *param = ir->actual_parameters.get_head(); + ir_rvalue *block = ((ir_instruction *)param)->as_rvalue(); + + param = param->get_next(); + ir_rvalue *offset = ((ir_instruction *)param)->as_rvalue(); + + instr->src[0] = nir_src_for_ssa(evaluate_rvalue(block)); + instr->src[1] = nir_src_for_ssa(evaluate_rvalue(offset)); + + const glsl_type *type = ir->return_deref->var->type; + instr->num_components = type->vector_elements; + + /* Setup destination register */ + nir_ssa_dest_init(&instr->instr, &instr->dest, + type->vector_elements, NULL); + + /* Insert the created nir instruction now since in the case of boolean + * result we will need to emit another instruction after it + */ + nir_builder_instr_insert(&b, &instr->instr); + + /* + * In SSBO/UBO's, a true boolean value is any non-zero value, but we + * consider a true boolean to be ~0. Fix this up with a != 0 + * comparison. + */ + if (type->base_type == GLSL_TYPE_BOOL) { + nir_alu_instr *load_ssbo_compare = + nir_alu_instr_create(shader, nir_op_ine); + load_ssbo_compare->src[0].src.is_ssa = true; + load_ssbo_compare->src[0].src.ssa = &instr->dest.ssa; + load_ssbo_compare->src[1].src = + nir_src_for_ssa(nir_imm_int(&b, 0)); + for (unsigned i = 0; i < type->vector_elements; i++) + load_ssbo_compare->src[1].swizzle[i] = 0; + nir_ssa_dest_init(&load_ssbo_compare->instr, + &load_ssbo_compare->dest.dest, + type->vector_elements, NULL); + load_ssbo_compare->dest.write_mask = (1 << type->vector_elements) - 1; + nir_builder_instr_insert(&b, &load_ssbo_compare->instr); + dest = &load_ssbo_compare->dest.dest; + } + break; + } + case nir_intrinsic_ssbo_atomic_add: + case nir_intrinsic_ssbo_atomic_imin: + case nir_intrinsic_ssbo_atomic_umin: + case nir_intrinsic_ssbo_atomic_imax: + case nir_intrinsic_ssbo_atomic_umax: + case nir_intrinsic_ssbo_atomic_and: + case nir_intrinsic_ssbo_atomic_or: + case nir_intrinsic_ssbo_atomic_xor: + case nir_intrinsic_ssbo_atomic_exchange: + case nir_intrinsic_ssbo_atomic_comp_swap: { + int param_count = ir->actual_parameters.length(); + assert(param_count == 3 || param_count == 4); + + /* Block index */ + exec_node *param = ir->actual_parameters.get_head(); + ir_instruction *inst = (ir_instruction *) param; + instr->src[0] = nir_src_for_ssa(evaluate_rvalue(inst->as_rvalue())); + + /* Offset */ + param = param->get_next(); + inst = (ir_instruction *) param; + instr->src[1] = nir_src_for_ssa(evaluate_rvalue(inst->as_rvalue())); + + /* data1 parameter (this is always present) */ + param = param->get_next(); + inst = (ir_instruction *) param; + instr->src[2] = nir_src_for_ssa(evaluate_rvalue(inst->as_rvalue())); + + /* data2 parameter (only with atomic_comp_swap) */ + if (param_count == 4) { + assert(op == nir_intrinsic_ssbo_atomic_comp_swap); + param = param->get_next(); + inst = (ir_instruction *) param; + instr->src[3] = nir_src_for_ssa(evaluate_rvalue(inst->as_rvalue())); + } + + /* Atomic result */ + assert(ir->return_deref); + nir_ssa_dest_init(&instr->instr, &instr->dest, + ir->return_deref->type->vector_elements, NULL); + nir_builder_instr_insert(&b, &instr->instr); + break; + } + case nir_intrinsic_load_shared: { + exec_node *param = ir->actual_parameters.get_head(); + ir_rvalue *offset = ((ir_instruction *)param)->as_rvalue(); + + instr->const_index[0] = 0; + instr->src[0] = nir_src_for_ssa(evaluate_rvalue(offset)); + + const glsl_type *type = ir->return_deref->var->type; + instr->num_components = type->vector_elements; + + /* Setup destination register */ + nir_ssa_dest_init(&instr->instr, &instr->dest, + type->vector_elements, NULL); + + nir_builder_instr_insert(&b, &instr->instr); + break; + } + case nir_intrinsic_store_shared: { + exec_node *param = ir->actual_parameters.get_head(); + ir_rvalue *offset = ((ir_instruction *)param)->as_rvalue(); + + param = param->get_next(); + ir_rvalue *val = ((ir_instruction *)param)->as_rvalue(); + + param = param->get_next(); + ir_constant *write_mask = ((ir_instruction *)param)->as_constant(); + assert(write_mask); + + instr->const_index[0] = 0; + instr->src[1] = nir_src_for_ssa(evaluate_rvalue(offset)); + + instr->const_index[1] = write_mask->value.u[0]; + + instr->src[0] = nir_src_for_ssa(evaluate_rvalue(val)); + instr->num_components = val->type->vector_elements; + + nir_builder_instr_insert(&b, &instr->instr); + break; + } + case nir_intrinsic_shared_atomic_add: + case nir_intrinsic_shared_atomic_imin: + case nir_intrinsic_shared_atomic_umin: + case nir_intrinsic_shared_atomic_imax: + case nir_intrinsic_shared_atomic_umax: + case nir_intrinsic_shared_atomic_and: + case nir_intrinsic_shared_atomic_or: + case nir_intrinsic_shared_atomic_xor: + case nir_intrinsic_shared_atomic_exchange: + case nir_intrinsic_shared_atomic_comp_swap: { + int param_count = ir->actual_parameters.length(); + assert(param_count == 2 || param_count == 3); + + /* Offset */ + exec_node *param = ir->actual_parameters.get_head(); + ir_instruction *inst = (ir_instruction *) param; + instr->src[0] = nir_src_for_ssa(evaluate_rvalue(inst->as_rvalue())); + + /* data1 parameter (this is always present) */ + param = param->get_next(); + inst = (ir_instruction *) param; + instr->src[1] = nir_src_for_ssa(evaluate_rvalue(inst->as_rvalue())); + + /* data2 parameter (only with atomic_comp_swap) */ + if (param_count == 3) { + assert(op == nir_intrinsic_shared_atomic_comp_swap); + param = param->get_next(); + inst = (ir_instruction *) param; + instr->src[2] = + nir_src_for_ssa(evaluate_rvalue(inst->as_rvalue())); + } + + /* Atomic result */ + assert(ir->return_deref); + nir_ssa_dest_init(&instr->instr, &instr->dest, + ir->return_deref->type->vector_elements, NULL); + nir_builder_instr_insert(&b, &instr->instr); + break; + } + default: + unreachable("not reached"); + } + + if (ir->return_deref) { + nir_intrinsic_instr *store_instr = + nir_intrinsic_instr_create(shader, nir_intrinsic_store_var); + store_instr->num_components = ir->return_deref->type->vector_elements; + store_instr->const_index[0] = (1 << store_instr->num_components) - 1; + + store_instr->variables[0] = + evaluate_deref(&store_instr->instr, ir->return_deref); + store_instr->src[0] = nir_src_for_ssa(&dest->ssa); + + nir_builder_instr_insert(&b, &store_instr->instr); + } + + return; + } + + struct hash_entry *entry = + _mesa_hash_table_search(this->overload_table, ir->callee); + assert(entry); + nir_function *callee = (nir_function *) entry->data; + + nir_call_instr *instr = nir_call_instr_create(this->shader, callee); + + unsigned i = 0; + foreach_in_list(ir_dereference, param, &ir->actual_parameters) { + instr->params[i] = evaluate_deref(&instr->instr, param); + i++; + } + + instr->return_deref = evaluate_deref(&instr->instr, ir->return_deref); + nir_builder_instr_insert(&b, &instr->instr); +} + +void +nir_visitor::visit(ir_assignment *ir) +{ + unsigned num_components = ir->lhs->type->vector_elements; + + if ((ir->rhs->as_dereference() || ir->rhs->as_constant()) && + (ir->write_mask == (1 << num_components) - 1 || ir->write_mask == 0)) { + /* We're doing a plain-as-can-be copy, so emit a copy_var */ + nir_intrinsic_instr *copy = + nir_intrinsic_instr_create(this->shader, nir_intrinsic_copy_var); + + copy->variables[0] = evaluate_deref(©->instr, ir->lhs); + copy->variables[1] = evaluate_deref(©->instr, ir->rhs); + + if (ir->condition) { + nir_if *if_stmt = nir_if_create(this->shader); + if_stmt->condition = nir_src_for_ssa(evaluate_rvalue(ir->condition)); + nir_builder_cf_insert(&b, &if_stmt->cf_node); + nir_instr_insert_after_cf_list(&if_stmt->then_list, ©->instr); + b.cursor = nir_after_cf_node(&if_stmt->cf_node); + } else { + nir_builder_instr_insert(&b, ©->instr); + } + return; + } + + assert(ir->rhs->type->is_scalar() || ir->rhs->type->is_vector()); + + ir->lhs->accept(this); + nir_deref_var *lhs_deref = this->deref_head; + nir_ssa_def *src = evaluate_rvalue(ir->rhs); + + if (ir->write_mask != (1 << num_components) - 1 && ir->write_mask != 0) { + /* GLSL IR will give us the input to the write-masked assignment in a + * single packed vector. So, for example, if the writemask is xzw, then + * we have to swizzle x -> x, y -> z, and z -> w and get the y component + * from the load. + */ + unsigned swiz[4]; + unsigned component = 0; + for (unsigned i = 0; i < 4; i++) { + swiz[i] = ir->write_mask & (1 << i) ? component++ : 0; + } + src = nir_swizzle(&b, src, swiz, num_components, !supports_ints); + } + + nir_intrinsic_instr *store = + nir_intrinsic_instr_create(this->shader, nir_intrinsic_store_var); + store->num_components = ir->lhs->type->vector_elements; + store->const_index[0] = ir->write_mask; + nir_deref *store_deref = nir_copy_deref(store, &lhs_deref->deref); + store->variables[0] = nir_deref_as_var(store_deref); + store->src[0] = nir_src_for_ssa(src); + + if (ir->condition) { + nir_if *if_stmt = nir_if_create(this->shader); + if_stmt->condition = nir_src_for_ssa(evaluate_rvalue(ir->condition)); + nir_builder_cf_insert(&b, &if_stmt->cf_node); + nir_instr_insert_after_cf_list(&if_stmt->then_list, &store->instr); + b.cursor = nir_after_cf_node(&if_stmt->cf_node); + } else { + nir_builder_instr_insert(&b, &store->instr); + } +} + +/* + * Given an instruction, returns a pointer to its destination or NULL if there + * is no destination. + * + * Note that this only handles instructions we generate at this level. + */ +static nir_dest * +get_instr_dest(nir_instr *instr) +{ + nir_alu_instr *alu_instr; + nir_intrinsic_instr *intrinsic_instr; + nir_tex_instr *tex_instr; + + switch (instr->type) { + case nir_instr_type_alu: + alu_instr = nir_instr_as_alu(instr); + return &alu_instr->dest.dest; + + case nir_instr_type_intrinsic: + intrinsic_instr = nir_instr_as_intrinsic(instr); + if (nir_intrinsic_infos[intrinsic_instr->intrinsic].has_dest) + return &intrinsic_instr->dest; + else + return NULL; + + case nir_instr_type_tex: + tex_instr = nir_instr_as_tex(instr); + return &tex_instr->dest; + + default: + unreachable("not reached"); + } + + return NULL; +} + +void +nir_visitor::add_instr(nir_instr *instr, unsigned num_components) +{ + nir_dest *dest = get_instr_dest(instr); + + if (dest) + nir_ssa_dest_init(instr, dest, num_components, NULL); + + nir_builder_instr_insert(&b, instr); + + if (dest) { + assert(dest->is_ssa); + this->result = &dest->ssa; + } +} + +nir_ssa_def * +nir_visitor::evaluate_rvalue(ir_rvalue* ir) +{ + ir->accept(this); + if (ir->as_dereference() || ir->as_constant()) { + /* + * A dereference is being used on the right hand side, which means we + * must emit a variable load. + */ + + nir_intrinsic_instr *load_instr = + nir_intrinsic_instr_create(this->shader, nir_intrinsic_load_var); + load_instr->num_components = ir->type->vector_elements; + load_instr->variables[0] = this->deref_head; + ralloc_steal(load_instr, load_instr->variables[0]); + add_instr(&load_instr->instr, ir->type->vector_elements); + } + + return this->result; +} + +void +nir_visitor::visit(ir_expression *ir) +{ + /* Some special cases */ + switch (ir->operation) { + case ir_binop_ubo_load: { + nir_intrinsic_instr *load = + nir_intrinsic_instr_create(this->shader, nir_intrinsic_load_ubo); + load->num_components = ir->type->vector_elements; + load->src[0] = nir_src_for_ssa(evaluate_rvalue(ir->operands[0])); + load->src[1] = nir_src_for_ssa(evaluate_rvalue(ir->operands[1])); + add_instr(&load->instr, ir->type->vector_elements); + + /* + * In UBO's, a true boolean value is any non-zero value, but we consider + * a true boolean to be ~0. Fix this up with a != 0 comparison. + */ + + if (ir->type->base_type == GLSL_TYPE_BOOL) + this->result = nir_ine(&b, &load->dest.ssa, nir_imm_int(&b, 0)); + + return; + } + + case ir_unop_interpolate_at_centroid: + case ir_binop_interpolate_at_offset: + case ir_binop_interpolate_at_sample: { + ir_dereference *deref = ir->operands[0]->as_dereference(); + ir_swizzle *swizzle = NULL; + if (!deref) { + /* the api does not allow a swizzle here, but the varying packing code + * may have pushed one into here. + */ + swizzle = ir->operands[0]->as_swizzle(); + assert(swizzle); + deref = swizzle->val->as_dereference(); + assert(deref); + } + + deref->accept(this); + + nir_intrinsic_op op; + if (this->deref_head->var->data.mode == nir_var_shader_in) { + switch (ir->operation) { + case ir_unop_interpolate_at_centroid: + op = nir_intrinsic_interp_var_at_centroid; + break; + case ir_binop_interpolate_at_offset: + op = nir_intrinsic_interp_var_at_offset; + break; + case ir_binop_interpolate_at_sample: + op = nir_intrinsic_interp_var_at_sample; + break; + default: + unreachable("Invalid interpolation intrinsic"); + } + } else { + /* This case can happen if the vertex shader does not write the + * given varying. In this case, the linker will lower it to a + * global variable. Since interpolating a variable makes no + * sense, we'll just turn it into a load which will probably + * eventually end up as an SSA definition. + */ + assert(this->deref_head->var->data.mode == nir_var_global); + op = nir_intrinsic_load_var; + } + + nir_intrinsic_instr *intrin = nir_intrinsic_instr_create(shader, op); + intrin->num_components = deref->type->vector_elements; + intrin->variables[0] = this->deref_head; + ralloc_steal(intrin, intrin->variables[0]); + + if (intrin->intrinsic == nir_intrinsic_interp_var_at_offset || + intrin->intrinsic == nir_intrinsic_interp_var_at_sample) + intrin->src[0] = nir_src_for_ssa(evaluate_rvalue(ir->operands[1])); + + add_instr(&intrin->instr, deref->type->vector_elements); + + if (swizzle) { + unsigned swiz[4] = { + swizzle->mask.x, swizzle->mask.y, swizzle->mask.z, swizzle->mask.w + }; + + result = nir_swizzle(&b, result, swiz, + swizzle->type->vector_elements, false); + } + + return; + } + + default: + break; + } + + nir_ssa_def *srcs[4]; + for (unsigned i = 0; i < ir->get_num_operands(); i++) + srcs[i] = evaluate_rvalue(ir->operands[i]); + + glsl_base_type types[4]; + for (unsigned i = 0; i < ir->get_num_operands(); i++) + if (supports_ints) + types[i] = ir->operands[i]->type->base_type; + else + types[i] = GLSL_TYPE_FLOAT; + + glsl_base_type out_type; + if (supports_ints) + out_type = ir->type->base_type; + else + out_type = GLSL_TYPE_FLOAT; + + switch (ir->operation) { + case ir_unop_bit_not: result = nir_inot(&b, srcs[0]); break; + case ir_unop_logic_not: + result = supports_ints ? nir_inot(&b, srcs[0]) : nir_fnot(&b, srcs[0]); + break; + case ir_unop_neg: + result = (types[0] == GLSL_TYPE_FLOAT) ? nir_fneg(&b, srcs[0]) + : nir_ineg(&b, srcs[0]); + break; + case ir_unop_abs: + result = (types[0] == GLSL_TYPE_FLOAT) ? nir_fabs(&b, srcs[0]) + : nir_iabs(&b, srcs[0]); + break; + case ir_unop_saturate: + assert(types[0] == GLSL_TYPE_FLOAT); + result = nir_fsat(&b, srcs[0]); + break; + case ir_unop_sign: + result = (types[0] == GLSL_TYPE_FLOAT) ? nir_fsign(&b, srcs[0]) + : nir_isign(&b, srcs[0]); + break; + case ir_unop_rcp: result = nir_frcp(&b, srcs[0]); break; + case ir_unop_rsq: result = nir_frsq(&b, srcs[0]); break; + case ir_unop_sqrt: result = nir_fsqrt(&b, srcs[0]); break; + case ir_unop_exp: unreachable("ir_unop_exp should have been lowered"); + case ir_unop_log: unreachable("ir_unop_log should have been lowered"); + case ir_unop_exp2: result = nir_fexp2(&b, srcs[0]); break; + case ir_unop_log2: result = nir_flog2(&b, srcs[0]); break; + case ir_unop_i2f: + result = supports_ints ? nir_i2f(&b, srcs[0]) : nir_fmov(&b, srcs[0]); + break; + case ir_unop_u2f: + result = supports_ints ? nir_u2f(&b, srcs[0]) : nir_fmov(&b, srcs[0]); + break; + case ir_unop_b2f: + result = supports_ints ? nir_b2f(&b, srcs[0]) : nir_fmov(&b, srcs[0]); + break; + case ir_unop_f2i: result = nir_f2i(&b, srcs[0]); break; + case ir_unop_f2u: result = nir_f2u(&b, srcs[0]); break; + case ir_unop_f2b: result = nir_f2b(&b, srcs[0]); break; + case ir_unop_i2b: result = nir_i2b(&b, srcs[0]); break; + case ir_unop_b2i: result = nir_b2i(&b, srcs[0]); break; + case ir_unop_i2u: + case ir_unop_u2i: + case ir_unop_bitcast_i2f: + case ir_unop_bitcast_f2i: + case ir_unop_bitcast_u2f: + case ir_unop_bitcast_f2u: + case ir_unop_subroutine_to_int: + /* no-op */ + result = nir_imov(&b, srcs[0]); + break; + case ir_unop_trunc: result = nir_ftrunc(&b, srcs[0]); break; + case ir_unop_ceil: result = nir_fceil(&b, srcs[0]); break; + case ir_unop_floor: result = nir_ffloor(&b, srcs[0]); break; + case ir_unop_fract: result = nir_ffract(&b, srcs[0]); break; + case ir_unop_round_even: result = nir_fround_even(&b, srcs[0]); break; + case ir_unop_sin: result = nir_fsin(&b, srcs[0]); break; + case ir_unop_cos: result = nir_fcos(&b, srcs[0]); break; + case ir_unop_dFdx: result = nir_fddx(&b, srcs[0]); break; + case ir_unop_dFdy: result = nir_fddy(&b, srcs[0]); break; + case ir_unop_dFdx_fine: result = nir_fddx_fine(&b, srcs[0]); break; + case ir_unop_dFdy_fine: result = nir_fddy_fine(&b, srcs[0]); break; + case ir_unop_dFdx_coarse: result = nir_fddx_coarse(&b, srcs[0]); break; + case ir_unop_dFdy_coarse: result = nir_fddy_coarse(&b, srcs[0]); break; + case ir_unop_pack_snorm_2x16: + result = nir_pack_snorm_2x16(&b, srcs[0]); + break; + case ir_unop_pack_snorm_4x8: + result = nir_pack_snorm_4x8(&b, srcs[0]); + break; + case ir_unop_pack_unorm_2x16: + result = nir_pack_unorm_2x16(&b, srcs[0]); + break; + case ir_unop_pack_unorm_4x8: + result = nir_pack_unorm_4x8(&b, srcs[0]); + break; + case ir_unop_pack_half_2x16: + result = nir_pack_half_2x16(&b, srcs[0]); + break; + case ir_unop_unpack_snorm_2x16: + result = nir_unpack_snorm_2x16(&b, srcs[0]); + break; + case ir_unop_unpack_snorm_4x8: + result = nir_unpack_snorm_4x8(&b, srcs[0]); + break; + case ir_unop_unpack_unorm_2x16: + result = nir_unpack_unorm_2x16(&b, srcs[0]); + break; + case ir_unop_unpack_unorm_4x8: + result = nir_unpack_unorm_4x8(&b, srcs[0]); + break; + case ir_unop_unpack_half_2x16: + result = nir_unpack_half_2x16(&b, srcs[0]); + break; + case ir_unop_unpack_half_2x16_split_x: + result = nir_unpack_half_2x16_split_x(&b, srcs[0]); + break; + case ir_unop_unpack_half_2x16_split_y: + result = nir_unpack_half_2x16_split_y(&b, srcs[0]); + break; + case ir_unop_bitfield_reverse: + result = nir_bitfield_reverse(&b, srcs[0]); + break; + case ir_unop_bit_count: + result = nir_bit_count(&b, srcs[0]); + break; + case ir_unop_find_msb: + switch (types[0]) { + case GLSL_TYPE_UINT: + result = nir_ufind_msb(&b, srcs[0]); + break; + case GLSL_TYPE_INT: + result = nir_ifind_msb(&b, srcs[0]); + break; + default: + unreachable("Invalid type for findMSB()"); + } + break; + case ir_unop_find_lsb: + result = nir_find_lsb(&b, srcs[0]); + break; + + case ir_unop_noise: + switch (ir->type->vector_elements) { + case 1: + switch (ir->operands[0]->type->vector_elements) { + case 1: result = nir_fnoise1_1(&b, srcs[0]); break; + case 2: result = nir_fnoise1_2(&b, srcs[0]); break; + case 3: result = nir_fnoise1_3(&b, srcs[0]); break; + case 4: result = nir_fnoise1_4(&b, srcs[0]); break; + default: unreachable("not reached"); + } + break; + case 2: + switch (ir->operands[0]->type->vector_elements) { + case 1: result = nir_fnoise2_1(&b, srcs[0]); break; + case 2: result = nir_fnoise2_2(&b, srcs[0]); break; + case 3: result = nir_fnoise2_3(&b, srcs[0]); break; + case 4: result = nir_fnoise2_4(&b, srcs[0]); break; + default: unreachable("not reached"); + } + break; + case 3: + switch (ir->operands[0]->type->vector_elements) { + case 1: result = nir_fnoise3_1(&b, srcs[0]); break; + case 2: result = nir_fnoise3_2(&b, srcs[0]); break; + case 3: result = nir_fnoise3_3(&b, srcs[0]); break; + case 4: result = nir_fnoise3_4(&b, srcs[0]); break; + default: unreachable("not reached"); + } + break; + case 4: + switch (ir->operands[0]->type->vector_elements) { + case 1: result = nir_fnoise4_1(&b, srcs[0]); break; + case 2: result = nir_fnoise4_2(&b, srcs[0]); break; + case 3: result = nir_fnoise4_3(&b, srcs[0]); break; + case 4: result = nir_fnoise4_4(&b, srcs[0]); break; + default: unreachable("not reached"); + } + break; + default: + unreachable("not reached"); + } + break; + case ir_unop_get_buffer_size: { + nir_intrinsic_instr *load = nir_intrinsic_instr_create( + this->shader, + nir_intrinsic_get_buffer_size); + load->num_components = ir->type->vector_elements; + load->src[0] = nir_src_for_ssa(evaluate_rvalue(ir->operands[0])); + add_instr(&load->instr, ir->type->vector_elements); + return; + } + + case ir_binop_add: + result = (out_type == GLSL_TYPE_FLOAT) ? nir_fadd(&b, srcs[0], srcs[1]) + : nir_iadd(&b, srcs[0], srcs[1]); + break; + case ir_binop_sub: + result = (out_type == GLSL_TYPE_FLOAT) ? nir_fsub(&b, srcs[0], srcs[1]) + : nir_isub(&b, srcs[0], srcs[1]); + break; + case ir_binop_mul: + result = (out_type == GLSL_TYPE_FLOAT) ? nir_fmul(&b, srcs[0], srcs[1]) + : nir_imul(&b, srcs[0], srcs[1]); + break; + case ir_binop_div: + if (out_type == GLSL_TYPE_FLOAT) + result = nir_fdiv(&b, srcs[0], srcs[1]); + else if (out_type == GLSL_TYPE_INT) + result = nir_idiv(&b, srcs[0], srcs[1]); + else + result = nir_udiv(&b, srcs[0], srcs[1]); + break; + case ir_binop_mod: + result = (out_type == GLSL_TYPE_FLOAT) ? nir_fmod(&b, srcs[0], srcs[1]) + : nir_umod(&b, srcs[0], srcs[1]); + break; + case ir_binop_min: + if (out_type == GLSL_TYPE_FLOAT) + result = nir_fmin(&b, srcs[0], srcs[1]); + else if (out_type == GLSL_TYPE_INT) + result = nir_imin(&b, srcs[0], srcs[1]); + else + result = nir_umin(&b, srcs[0], srcs[1]); + break; + case ir_binop_max: + if (out_type == GLSL_TYPE_FLOAT) + result = nir_fmax(&b, srcs[0], srcs[1]); + else if (out_type == GLSL_TYPE_INT) + result = nir_imax(&b, srcs[0], srcs[1]); + else + result = nir_umax(&b, srcs[0], srcs[1]); + break; + case ir_binop_pow: result = nir_fpow(&b, srcs[0], srcs[1]); break; + case ir_binop_bit_and: result = nir_iand(&b, srcs[0], srcs[1]); break; + case ir_binop_bit_or: result = nir_ior(&b, srcs[0], srcs[1]); break; + case ir_binop_bit_xor: result = nir_ixor(&b, srcs[0], srcs[1]); break; + case ir_binop_logic_and: + result = supports_ints ? nir_iand(&b, srcs[0], srcs[1]) + : nir_fand(&b, srcs[0], srcs[1]); + break; + case ir_binop_logic_or: + result = supports_ints ? nir_ior(&b, srcs[0], srcs[1]) + : nir_for(&b, srcs[0], srcs[1]); + break; + case ir_binop_logic_xor: + result = supports_ints ? nir_ixor(&b, srcs[0], srcs[1]) + : nir_fxor(&b, srcs[0], srcs[1]); + break; + case ir_binop_lshift: result = nir_ishl(&b, srcs[0], srcs[1]); break; + case ir_binop_rshift: + result = (out_type == GLSL_TYPE_INT) ? nir_ishr(&b, srcs[0], srcs[1]) + : nir_ushr(&b, srcs[0], srcs[1]); + break; + case ir_binop_imul_high: + result = (out_type == GLSL_TYPE_INT) ? nir_imul_high(&b, srcs[0], srcs[1]) + : nir_umul_high(&b, srcs[0], srcs[1]); + break; + case ir_binop_carry: result = nir_uadd_carry(&b, srcs[0], srcs[1]); break; + case ir_binop_borrow: result = nir_usub_borrow(&b, srcs[0], srcs[1]); break; + case ir_binop_less: + if (supports_ints) { + if (types[0] == GLSL_TYPE_FLOAT) + result = nir_flt(&b, srcs[0], srcs[1]); + else if (types[0] == GLSL_TYPE_INT) + result = nir_ilt(&b, srcs[0], srcs[1]); + else + result = nir_ult(&b, srcs[0], srcs[1]); + } else { + result = nir_slt(&b, srcs[0], srcs[1]); + } + break; + case ir_binop_greater: + if (supports_ints) { + if (types[0] == GLSL_TYPE_FLOAT) + result = nir_flt(&b, srcs[1], srcs[0]); + else if (types[0] == GLSL_TYPE_INT) + result = nir_ilt(&b, srcs[1], srcs[0]); + else + result = nir_ult(&b, srcs[1], srcs[0]); + } else { + result = nir_slt(&b, srcs[1], srcs[0]); + } + break; + case ir_binop_lequal: + if (supports_ints) { + if (types[0] == GLSL_TYPE_FLOAT) + result = nir_fge(&b, srcs[1], srcs[0]); + else if (types[0] == GLSL_TYPE_INT) + result = nir_ige(&b, srcs[1], srcs[0]); + else + result = nir_uge(&b, srcs[1], srcs[0]); + } else { + result = nir_slt(&b, srcs[1], srcs[0]); + } + break; + case ir_binop_gequal: + if (supports_ints) { + if (types[0] == GLSL_TYPE_FLOAT) + result = nir_fge(&b, srcs[0], srcs[1]); + else if (types[0] == GLSL_TYPE_INT) + result = nir_ige(&b, srcs[0], srcs[1]); + else + result = nir_uge(&b, srcs[0], srcs[1]); + } else { + result = nir_slt(&b, srcs[0], srcs[1]); + } + break; + case ir_binop_equal: + if (supports_ints) { + if (types[0] == GLSL_TYPE_FLOAT) + result = nir_feq(&b, srcs[0], srcs[1]); + else + result = nir_ieq(&b, srcs[0], srcs[1]); + } else { + result = nir_seq(&b, srcs[0], srcs[1]); + } + break; + case ir_binop_nequal: + if (supports_ints) { + if (types[0] == GLSL_TYPE_FLOAT) + result = nir_fne(&b, srcs[0], srcs[1]); + else + result = nir_ine(&b, srcs[0], srcs[1]); + } else { + result = nir_sne(&b, srcs[0], srcs[1]); + } + break; + case ir_binop_all_equal: + if (supports_ints) { + if (types[0] == GLSL_TYPE_FLOAT) { + switch (ir->operands[0]->type->vector_elements) { + case 1: result = nir_feq(&b, srcs[0], srcs[1]); break; + case 2: result = nir_ball_fequal2(&b, srcs[0], srcs[1]); break; + case 3: result = nir_ball_fequal3(&b, srcs[0], srcs[1]); break; + case 4: result = nir_ball_fequal4(&b, srcs[0], srcs[1]); break; + default: + unreachable("not reached"); + } + } else { + switch (ir->operands[0]->type->vector_elements) { + case 1: result = nir_ieq(&b, srcs[0], srcs[1]); break; + case 2: result = nir_ball_iequal2(&b, srcs[0], srcs[1]); break; + case 3: result = nir_ball_iequal3(&b, srcs[0], srcs[1]); break; + case 4: result = nir_ball_iequal4(&b, srcs[0], srcs[1]); break; + default: + unreachable("not reached"); + } + } + } else { + switch (ir->operands[0]->type->vector_elements) { + case 1: result = nir_seq(&b, srcs[0], srcs[1]); break; + case 2: result = nir_fall_equal2(&b, srcs[0], srcs[1]); break; + case 3: result = nir_fall_equal3(&b, srcs[0], srcs[1]); break; + case 4: result = nir_fall_equal4(&b, srcs[0], srcs[1]); break; + default: + unreachable("not reached"); + } + } + break; + case ir_binop_any_nequal: + if (supports_ints) { + if (types[0] == GLSL_TYPE_FLOAT) { + switch (ir->operands[0]->type->vector_elements) { + case 1: result = nir_fne(&b, srcs[0], srcs[1]); break; + case 2: result = nir_bany_fnequal2(&b, srcs[0], srcs[1]); break; + case 3: result = nir_bany_fnequal3(&b, srcs[0], srcs[1]); break; + case 4: result = nir_bany_fnequal4(&b, srcs[0], srcs[1]); break; + default: + unreachable("not reached"); + } + } else { + switch (ir->operands[0]->type->vector_elements) { + case 1: result = nir_ine(&b, srcs[0], srcs[1]); break; + case 2: result = nir_bany_inequal2(&b, srcs[0], srcs[1]); break; + case 3: result = nir_bany_inequal3(&b, srcs[0], srcs[1]); break; + case 4: result = nir_bany_inequal4(&b, srcs[0], srcs[1]); break; + default: + unreachable("not reached"); + } + } + } else { + switch (ir->operands[0]->type->vector_elements) { + case 1: result = nir_sne(&b, srcs[0], srcs[1]); break; + case 2: result = nir_fany_nequal2(&b, srcs[0], srcs[1]); break; + case 3: result = nir_fany_nequal3(&b, srcs[0], srcs[1]); break; + case 4: result = nir_fany_nequal4(&b, srcs[0], srcs[1]); break; + default: + unreachable("not reached"); + } + } + break; + case ir_binop_dot: + switch (ir->operands[0]->type->vector_elements) { + case 2: result = nir_fdot2(&b, srcs[0], srcs[1]); break; + case 3: result = nir_fdot3(&b, srcs[0], srcs[1]); break; + case 4: result = nir_fdot4(&b, srcs[0], srcs[1]); break; + default: + unreachable("not reached"); + } + break; + + case ir_binop_pack_half_2x16_split: + result = nir_pack_half_2x16_split(&b, srcs[0], srcs[1]); + break; + case ir_binop_ldexp: result = nir_ldexp(&b, srcs[0], srcs[1]); break; + case ir_triop_fma: + result = nir_ffma(&b, srcs[0], srcs[1], srcs[2]); + break; + case ir_triop_lrp: + result = nir_flrp(&b, srcs[0], srcs[1], srcs[2]); + break; + case ir_triop_csel: + if (supports_ints) + result = nir_bcsel(&b, srcs[0], srcs[1], srcs[2]); + else + result = nir_fcsel(&b, srcs[0], srcs[1], srcs[2]); + break; + case ir_triop_bitfield_extract: + result = (out_type == GLSL_TYPE_INT) ? + nir_ibitfield_extract(&b, srcs[0], srcs[1], srcs[2]) : + nir_ubitfield_extract(&b, srcs[0], srcs[1], srcs[2]); + break; + case ir_quadop_bitfield_insert: + result = nir_bitfield_insert(&b, srcs[0], srcs[1], srcs[2], srcs[3]); + break; + case ir_quadop_vector: + result = nir_vec(&b, srcs, ir->type->vector_elements); + break; + + default: + unreachable("not reached"); + } +} + +void +nir_visitor::visit(ir_swizzle *ir) +{ + unsigned swizzle[4] = { ir->mask.x, ir->mask.y, ir->mask.z, ir->mask.w }; + result = nir_swizzle(&b, evaluate_rvalue(ir->val), swizzle, + ir->type->vector_elements, !supports_ints); +} + +void +nir_visitor::visit(ir_texture *ir) +{ + unsigned num_srcs; + nir_texop op; + switch (ir->op) { + case ir_tex: + op = nir_texop_tex; + num_srcs = 1; /* coordinate */ + break; + + case ir_txb: + case ir_txl: + op = (ir->op == ir_txb) ? nir_texop_txb : nir_texop_txl; + num_srcs = 2; /* coordinate, bias/lod */ + break; + + case ir_txd: + op = nir_texop_txd; /* coordinate, dPdx, dPdy */ + num_srcs = 3; + break; + + case ir_txf: + op = nir_texop_txf; + if (ir->lod_info.lod != NULL) + num_srcs = 2; /* coordinate, lod */ + else + num_srcs = 1; /* coordinate */ + break; + + case ir_txf_ms: + op = nir_texop_txf_ms; + num_srcs = 2; /* coordinate, sample_index */ + break; + + case ir_txs: + op = nir_texop_txs; + if (ir->lod_info.lod != NULL) + num_srcs = 1; /* lod */ + else + num_srcs = 0; + break; + + case ir_lod: + op = nir_texop_lod; + num_srcs = 1; /* coordinate */ + break; + + case ir_tg4: + op = nir_texop_tg4; + num_srcs = 1; /* coordinate */ + break; + + case ir_query_levels: + op = nir_texop_query_levels; + num_srcs = 0; + break; + + case ir_texture_samples: + op = nir_texop_texture_samples; + num_srcs = 0; + break; + + case ir_samples_identical: + op = nir_texop_samples_identical; + num_srcs = 1; /* coordinate */ + break; + + default: + unreachable("not reached"); + } + + if (ir->projector != NULL) + num_srcs++; + if (ir->shadow_comparitor != NULL) + num_srcs++; + if (ir->offset != NULL && ir->offset->as_constant() == NULL) + num_srcs++; + + nir_tex_instr *instr = nir_tex_instr_create(this->shader, num_srcs); + + instr->op = op; + instr->sampler_dim = + (glsl_sampler_dim) ir->sampler->type->sampler_dimensionality; + instr->is_array = ir->sampler->type->sampler_array; + instr->is_shadow = ir->sampler->type->sampler_shadow; + if (instr->is_shadow) + instr->is_new_style_shadow = (ir->type->vector_elements == 1); + switch (ir->type->base_type) { + case GLSL_TYPE_FLOAT: + instr->dest_type = nir_type_float; + break; + case GLSL_TYPE_INT: + instr->dest_type = nir_type_int; + break; + case GLSL_TYPE_BOOL: + case GLSL_TYPE_UINT: + instr->dest_type = nir_type_uint; + break; + default: + unreachable("not reached"); + } + + instr->sampler = evaluate_deref(&instr->instr, ir->sampler); + + unsigned src_number = 0; + + if (ir->coordinate != NULL) { + instr->coord_components = ir->coordinate->type->vector_elements; + instr->src[src_number].src = + nir_src_for_ssa(evaluate_rvalue(ir->coordinate)); + instr->src[src_number].src_type = nir_tex_src_coord; + src_number++; + } + + if (ir->projector != NULL) { + instr->src[src_number].src = + nir_src_for_ssa(evaluate_rvalue(ir->projector)); + instr->src[src_number].src_type = nir_tex_src_projector; + src_number++; + } + + if (ir->shadow_comparitor != NULL) { + instr->src[src_number].src = + nir_src_for_ssa(evaluate_rvalue(ir->shadow_comparitor)); + instr->src[src_number].src_type = nir_tex_src_comparitor; + src_number++; + } + + if (ir->offset != NULL) { + /* we don't support multiple offsets yet */ + assert(ir->offset->type->is_vector() || ir->offset->type->is_scalar()); + + ir_constant *const_offset = ir->offset->as_constant(); + if (const_offset != NULL) { + for (unsigned i = 0; i < const_offset->type->vector_elements; i++) + instr->const_offset[i] = const_offset->value.i[i]; + } else { + instr->src[src_number].src = + nir_src_for_ssa(evaluate_rvalue(ir->offset)); + instr->src[src_number].src_type = nir_tex_src_offset; + src_number++; + } + } + + switch (ir->op) { + case ir_txb: + instr->src[src_number].src = + nir_src_for_ssa(evaluate_rvalue(ir->lod_info.bias)); + instr->src[src_number].src_type = nir_tex_src_bias; + src_number++; + break; + + case ir_txl: + case ir_txf: + case ir_txs: + if (ir->lod_info.lod != NULL) { + instr->src[src_number].src = + nir_src_for_ssa(evaluate_rvalue(ir->lod_info.lod)); + instr->src[src_number].src_type = nir_tex_src_lod; + src_number++; + } + break; + + case ir_txd: + instr->src[src_number].src = + nir_src_for_ssa(evaluate_rvalue(ir->lod_info.grad.dPdx)); + instr->src[src_number].src_type = nir_tex_src_ddx; + src_number++; + instr->src[src_number].src = + nir_src_for_ssa(evaluate_rvalue(ir->lod_info.grad.dPdy)); + instr->src[src_number].src_type = nir_tex_src_ddy; + src_number++; + break; + + case ir_txf_ms: + instr->src[src_number].src = + nir_src_for_ssa(evaluate_rvalue(ir->lod_info.sample_index)); + instr->src[src_number].src_type = nir_tex_src_ms_index; + src_number++; + break; + + case ir_tg4: + instr->component = ir->lod_info.component->as_constant()->value.u[0]; + break; + + default: + break; + } + + assert(src_number == num_srcs); + + add_instr(&instr->instr, nir_tex_instr_dest_size(instr)); +} + +void +nir_visitor::visit(ir_constant *ir) +{ + /* + * We don't know if this variable is an an array or struct that gets + * dereferenced, so do the safe thing an make it a variable with a + * constant initializer and return a dereference. + */ + + nir_variable *var = + nir_local_variable_create(this->impl, ir->type, "const_temp"); + var->data.read_only = true; + var->constant_initializer = constant_copy(ir, var); + + this->deref_head = nir_deref_var_create(this->shader, var); + this->deref_tail = &this->deref_head->deref; +} + +void +nir_visitor::visit(ir_dereference_variable *ir) +{ + struct hash_entry *entry = + _mesa_hash_table_search(this->var_table, ir->var); + assert(entry); + nir_variable *var = (nir_variable *) entry->data; + + nir_deref_var *deref = nir_deref_var_create(this->shader, var); + this->deref_head = deref; + this->deref_tail = &deref->deref; +} + +void +nir_visitor::visit(ir_dereference_record *ir) +{ + ir->record->accept(this); + + int field_index = this->deref_tail->type->field_index(ir->field); + assert(field_index >= 0); + + nir_deref_struct *deref = nir_deref_struct_create(this->deref_tail, field_index); + deref->deref.type = ir->type; + this->deref_tail->child = &deref->deref; + this->deref_tail = &deref->deref; +} + +void +nir_visitor::visit(ir_dereference_array *ir) +{ + nir_deref_array *deref = nir_deref_array_create(this->shader); + deref->deref.type = ir->type; + + ir_constant *const_index = ir->array_index->as_constant(); + if (const_index != NULL) { + deref->deref_array_type = nir_deref_array_type_direct; + deref->base_offset = const_index->value.u[0]; + } else { + deref->deref_array_type = nir_deref_array_type_indirect; + deref->indirect = + nir_src_for_ssa(evaluate_rvalue(ir->array_index)); + } + + ir->array->accept(this); + + this->deref_tail->child = &deref->deref; + ralloc_steal(this->deref_tail, deref); + this->deref_tail = &deref->deref; +} + +void +nir_visitor::visit(ir_barrier *ir) +{ + nir_intrinsic_instr *instr = + nir_intrinsic_instr_create(this->shader, nir_intrinsic_barrier); + nir_builder_instr_insert(&b, &instr->instr); +} |