xserver and mesa git update 28-12-2010

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);

+}