diff options
Diffstat (limited to 'mesalib/src/glsl/opt_function_inlining.cpp')
| -rw-r--r-- | mesalib/src/glsl/opt_function_inlining.cpp | 424 |
1 files changed, 424 insertions, 0 deletions
diff --git a/mesalib/src/glsl/opt_function_inlining.cpp b/mesalib/src/glsl/opt_function_inlining.cpp new file mode 100644 index 000000000..83197e11a --- /dev/null +++ b/mesalib/src/glsl/opt_function_inlining.cpp @@ -0,0 +1,424 @@ +/*
+ * 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 <inttypes.h>
+#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);
+
+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_assignment *);
+ 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;
+};
+
+
+bool
+automatic_inlining_predicate(ir_instruction *ir)
+{
+ ir_call *call = ir->as_call();
+
+ if (call && can_inline(call))
+ return true;
+
+ return false;
+}
+
+bool
+do_function_inlining(exec_list *instructions)
+{
+ ir_function_inlining_visitor v;
+
+ do_expression_flattening(instructions, automatic_inlining_predicate);
+
+ v.run(instructions);
+
+ return v.progress;
+}
+
+static void
+replace_return_with_assignment(ir_instruction *ir, void *data)
+{
+ void *ctx = talloc_parent(ir);
+ ir_variable *retval = (ir_variable *)data;
+ ir_return *ret = ir->as_return();
+
+ if (ret) {
+ if (ret->value) {
+ ir_rvalue *lhs = new(ctx) ir_dereference_variable(retval);
+ 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();
+ }
+ }
+}
+
+ir_rvalue *
+ir_call::generate_inline(ir_instruction *next_ir)
+{
+ void *ctx = talloc_parent(this);
+ ir_variable **parameters;
+ int num_parameters;
+ int i;
+ ir_variable *retval = NULL;
+ 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 storage for the return value. */
+ if (this->callee->return_type) {
+ retval = new(ctx) ir_variable(this->callee->return_type, "_ret_val",
+ ir_var_auto);
+ next_ir->insert_before(retval);
+ }
+
+ /* 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_in ||
+ sig_param->mode == ir_var_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, retval);
+ }
+
+ /* 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. */
+ foreach_iter(exec_list_iterator, iter, new_instructions) {
+ ir_instruction *ir = (ir_instruction *)iter.get();
+ next_ir->insert_before(ir);
+ }
+
+ /* 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_out ||
+ sig_param->mode == ir_var_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);
+
+ if (retval)
+ return new(ctx) ir_dereference_variable(retval);
+ else
+ return NULL;
+}
+
+
+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)) {
+ /* If the call was part of some tree, then it should have been
+ * flattened out or we shouldn't have seen it because of a
+ * visit_continue_with_parent in this visitor.
+ */
+ assert(ir == base_ir);
+
+ (void) ir->generate_inline(ir);
+ ir->remove();
+ this->progress = true;
+ }
+
+ return visit_continue;
+}
+
+
+ir_visitor_status
+ir_function_inlining_visitor::visit_enter(ir_assignment *ir)
+{
+ ir_call *call = ir->rhs->as_call();
+ if (!call || !can_inline(call))
+ return visit_continue;
+
+ /* generates the parameter setup, function body, and returns the return
+ * value of the function
+ */
+ ir_rvalue *rhs = call->generate_inline(ir);
+ assert(rhs);
+
+ ir->rhs = rhs;
+ 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(talloc_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);
+}
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