| 0,0 → 1,372 |
|---|
| /* |
| * Copyright © 2010 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 opt_function_inlining.cpp |
| * |
| * Replaces calls to functions with the body of the function. |
| */ |
| |
| #include "ir.h" |
| #include "ir_visitor.h" |
| #include "ir_function_inlining.h" |
| #include "ir_expression_flattening.h" |
| #include "glsl_types.h" |
| #include "program/hash_table.h" |
| |
| static void |
| do_sampler_replacement(exec_list *instructions, |
| ir_variable *sampler, |
| ir_dereference *deref); |
| |
| namespace { |
| |
| class ir_function_inlining_visitor : public ir_hierarchical_visitor { |
| public: |
| ir_function_inlining_visitor() |
| { |
| progress = false; |
| } |
| |
| virtual ~ir_function_inlining_visitor() |
| { |
| /* empty */ |
| } |
| |
| virtual ir_visitor_status visit_enter(ir_expression *); |
| virtual ir_visitor_status visit_enter(ir_call *); |
| virtual ir_visitor_status visit_enter(ir_return *); |
| virtual ir_visitor_status visit_enter(ir_texture *); |
| virtual ir_visitor_status visit_enter(ir_swizzle *); |
| |
| bool progress; |
| }; |
| |
| } /* unnamed namespace */ |
| |
| bool |
| do_function_inlining(exec_list *instructions) |
| { |
| ir_function_inlining_visitor v; |
| |
| v.run(instructions); |
| |
| return v.progress; |
| } |
| |
| static void |
| replace_return_with_assignment(ir_instruction *ir, void *data) |
| { |
| void *ctx = ralloc_parent(ir); |
| ir_dereference *orig_deref = (ir_dereference *) data; |
| ir_return *ret = ir->as_return(); |
| |
| if (ret) { |
| if (ret->value) { |
| ir_rvalue *lhs = orig_deref->clone(ctx, NULL); |
| ret->replace_with(new(ctx) ir_assignment(lhs, ret->value, NULL)); |
| } else { |
| /* un-valued return has to be the last return, or we shouldn't |
| * have reached here. (see can_inline()). |
| */ |
| assert(ret->next->is_tail_sentinel()); |
| ret->remove(); |
| } |
| } |
| } |
| |
| void |
| ir_call::generate_inline(ir_instruction *next_ir) |
| { |
| void *ctx = ralloc_parent(this); |
| ir_variable **parameters; |
| int num_parameters; |
| int i; |
| struct hash_table *ht; |
| |
| ht = hash_table_ctor(0, hash_table_pointer_hash, hash_table_pointer_compare); |
| |
| num_parameters = 0; |
| foreach_iter(exec_list_iterator, iter_sig, this->callee->parameters) |
| num_parameters++; |
| |
| parameters = new ir_variable *[num_parameters]; |
| |
| /* Generate the declarations for the parameters to our inlined code, |
| * and set up the mapping of real function body variables to ours. |
| */ |
| i = 0; |
| exec_list_iterator sig_param_iter = this->callee->parameters.iterator(); |
| exec_list_iterator param_iter = this->actual_parameters.iterator(); |
| for (i = 0; i < num_parameters; i++) { |
| ir_variable *sig_param = (ir_variable *) sig_param_iter.get(); |
| ir_rvalue *param = (ir_rvalue *) param_iter.get(); |
| |
| /* Generate a new variable for the parameter. */ |
| if (sig_param->type->base_type == GLSL_TYPE_SAMPLER) { |
| /* For samplers, we want the inlined sampler references |
| * referencing the passed in sampler variable, since that |
| * will have the location information, which an assignment of |
| * a sampler wouldn't. Fix it up below. |
| */ |
| parameters[i] = NULL; |
| } else { |
| parameters[i] = sig_param->clone(ctx, ht); |
| parameters[i]->mode = ir_var_auto; |
| |
| /* Remove the read-only decoration becuase we're going to write |
| * directly to this variable. If the cloned variable is left |
| * read-only and the inlined function is inside a loop, the loop |
| * analysis code will get confused. |
| */ |
| parameters[i]->read_only = false; |
| next_ir->insert_before(parameters[i]); |
| } |
| |
| /* Move the actual param into our param variable if it's an 'in' type. */ |
| if (parameters[i] && (sig_param->mode == ir_var_function_in || |
| sig_param->mode == ir_var_const_in || |
| sig_param->mode == ir_var_function_inout)) { |
| ir_assignment *assign; |
| |
| assign = new(ctx) ir_assignment(new(ctx) ir_dereference_variable(parameters[i]), |
| param, NULL); |
| next_ir->insert_before(assign); |
| } |
| |
| sig_param_iter.next(); |
| param_iter.next(); |
| } |
| |
| exec_list new_instructions; |
| |
| /* Generate the inlined body of the function to a new list */ |
| foreach_iter(exec_list_iterator, iter, callee->body) { |
| ir_instruction *ir = (ir_instruction *)iter.get(); |
| ir_instruction *new_ir = ir->clone(ctx, ht); |
| |
| new_instructions.push_tail(new_ir); |
| visit_tree(new_ir, replace_return_with_assignment, this->return_deref); |
| } |
| |
| /* If any samplers were passed in, replace any deref of the sampler |
| * with a deref of the sampler argument. |
| */ |
| param_iter = this->actual_parameters.iterator(); |
| sig_param_iter = this->callee->parameters.iterator(); |
| for (i = 0; i < num_parameters; i++) { |
| ir_instruction *const param = (ir_instruction *) param_iter.get(); |
| ir_variable *sig_param = (ir_variable *) sig_param_iter.get(); |
| |
| if (sig_param->type->base_type == GLSL_TYPE_SAMPLER) { |
| ir_dereference *deref = param->as_dereference(); |
| |
| assert(deref); |
| do_sampler_replacement(&new_instructions, sig_param, deref); |
| } |
| param_iter.next(); |
| sig_param_iter.next(); |
| } |
| |
| /* Now push those new instructions in. */ |
| next_ir->insert_before(&new_instructions); |
| |
| /* Copy back the value of any 'out' parameters from the function body |
| * variables to our own. |
| */ |
| i = 0; |
| param_iter = this->actual_parameters.iterator(); |
| sig_param_iter = this->callee->parameters.iterator(); |
| for (i = 0; i < num_parameters; i++) { |
| ir_instruction *const param = (ir_instruction *) param_iter.get(); |
| const ir_variable *const sig_param = (ir_variable *) sig_param_iter.get(); |
| |
| /* Move our param variable into the actual param if it's an 'out' type. */ |
| if (parameters[i] && (sig_param->mode == ir_var_function_out || |
| sig_param->mode == ir_var_function_inout)) { |
| ir_assignment *assign; |
| |
| assign = new(ctx) ir_assignment(param->clone(ctx, NULL)->as_rvalue(), |
| new(ctx) ir_dereference_variable(parameters[i]), |
| NULL); |
| next_ir->insert_before(assign); |
| } |
| |
| param_iter.next(); |
| sig_param_iter.next(); |
| } |
| |
| delete [] parameters; |
| |
| hash_table_dtor(ht); |
| } |
| |
| |
| ir_visitor_status |
| ir_function_inlining_visitor::visit_enter(ir_expression *ir) |
| { |
| (void) ir; |
| return visit_continue_with_parent; |
| } |
| |
| |
| ir_visitor_status |
| ir_function_inlining_visitor::visit_enter(ir_return *ir) |
| { |
| (void) ir; |
| return visit_continue_with_parent; |
| } |
| |
| |
| ir_visitor_status |
| ir_function_inlining_visitor::visit_enter(ir_texture *ir) |
| { |
| (void) ir; |
| return visit_continue_with_parent; |
| } |
| |
| |
| ir_visitor_status |
| ir_function_inlining_visitor::visit_enter(ir_swizzle *ir) |
| { |
| (void) ir; |
| return visit_continue_with_parent; |
| } |
| |
| |
| ir_visitor_status |
| ir_function_inlining_visitor::visit_enter(ir_call *ir) |
| { |
| if (can_inline(ir)) { |
| ir->generate_inline(ir); |
| ir->remove(); |
| this->progress = true; |
| } |
| |
| return visit_continue; |
| } |
| |
| |
| /** |
| * Replaces references to the "sampler" variable with a clone of "deref." |
| * |
| * From the spec, samplers can appear in the tree as function |
| * (non-out) parameters and as the result of array indexing and |
| * structure field selection. In our builtin implementation, they |
| * also appear in the sampler field of an ir_tex instruction. |
| */ |
| |
| class ir_sampler_replacement_visitor : public ir_hierarchical_visitor { |
| public: |
| ir_sampler_replacement_visitor(ir_variable *sampler, ir_dereference *deref) |
| { |
| this->sampler = sampler; |
| this->deref = deref; |
| } |
| |
| virtual ~ir_sampler_replacement_visitor() |
| { |
| } |
| |
| virtual ir_visitor_status visit_leave(ir_call *); |
| virtual ir_visitor_status visit_leave(ir_dereference_array *); |
| virtual ir_visitor_status visit_leave(ir_dereference_record *); |
| virtual ir_visitor_status visit_leave(ir_texture *); |
| |
| void replace_deref(ir_dereference **deref); |
| void replace_rvalue(ir_rvalue **rvalue); |
| |
| ir_variable *sampler; |
| ir_dereference *deref; |
| }; |
| |
| void |
| ir_sampler_replacement_visitor::replace_deref(ir_dereference **deref) |
| { |
| ir_dereference_variable *deref_var = (*deref)->as_dereference_variable(); |
| if (deref_var && deref_var->var == this->sampler) { |
| *deref = this->deref->clone(ralloc_parent(*deref), NULL); |
| } |
| } |
| |
| void |
| ir_sampler_replacement_visitor::replace_rvalue(ir_rvalue **rvalue) |
| { |
| if (!*rvalue) |
| return; |
| |
| ir_dereference *deref = (*rvalue)->as_dereference(); |
| |
| if (!deref) |
| return; |
| |
| replace_deref(&deref); |
| *rvalue = deref; |
| } |
| |
| ir_visitor_status |
| ir_sampler_replacement_visitor::visit_leave(ir_texture *ir) |
| { |
| replace_deref(&ir->sampler); |
| |
| return visit_continue; |
| } |
| |
| ir_visitor_status |
| ir_sampler_replacement_visitor::visit_leave(ir_dereference_array *ir) |
| { |
| replace_rvalue(&ir->array); |
| return visit_continue; |
| } |
| |
| ir_visitor_status |
| ir_sampler_replacement_visitor::visit_leave(ir_dereference_record *ir) |
| { |
| replace_rvalue(&ir->record); |
| return visit_continue; |
| } |
| |
| ir_visitor_status |
| ir_sampler_replacement_visitor::visit_leave(ir_call *ir) |
| { |
| foreach_iter(exec_list_iterator, iter, *ir) { |
| ir_rvalue *param = (ir_rvalue *)iter.get(); |
| ir_rvalue *new_param = param; |
| replace_rvalue(&new_param); |
| |
| if (new_param != param) { |
| param->replace_with(new_param); |
| } |
| } |
| return visit_continue; |
| } |
| |
| static void |
| do_sampler_replacement(exec_list *instructions, |
| ir_variable *sampler, |
| ir_dereference *deref) |
| { |
| ir_sampler_replacement_visitor v(sampler, deref); |
| |
| visit_list_elements(&v, instructions); |
| } |