libX11 libXinerama mesa git update 1 Feb 2011

1 files changed, 529 insertions, 529 deletions

diff --git a/mesalib/src/glsl/ir_validate.cpp b/mesalib/src/glsl/ir_validate.cpp
index 9e2f7751c..44d7549ea 100644
--- a/mesalib/src/glsl/ir_validate.cpp
+++ b/mesalib/src/glsl/ir_validate.cpp
@@ -1,529 +1,529 @@
-/*

- * 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 ir_validate.cpp

- *

- * Attempts to verify that various invariants of the IR tree are true.

- *

- * In particular, at the moment it makes sure that no single

- * ir_instruction node except for ir_variable appears multiple times

- * in the ir tree.  ir_variable does appear multiple times: Once as a

- * declaration in an exec_list, and multiple times as the endpoint of

- * a dereference chain.

- */

-

-#include <inttypes.h>

-#include "ir.h"

-#include "ir_hierarchical_visitor.h"

-#include "program/hash_table.h"

-#include "glsl_types.h"

-

-class ir_validate : public ir_hierarchical_visitor {

-public:

-   ir_validate()

-   {

-      this->ht = hash_table_ctor(0, hash_table_pointer_hash,

-				 hash_table_pointer_compare);

-

-      this->current_function = NULL;

-

-      this->callback = ir_validate::validate_ir;

-      this->data = ht;

-   }

-

-   ~ir_validate()

-   {

-      hash_table_dtor(this->ht);

-   }

-

-   virtual ir_visitor_status visit(ir_variable *v);

-   virtual ir_visitor_status visit(ir_dereference_variable *ir);

-   virtual ir_visitor_status visit(ir_if *ir);

-

-   virtual ir_visitor_status visit_leave(ir_loop *ir);

-   virtual ir_visitor_status visit_enter(ir_function *ir);

-   virtual ir_visitor_status visit_leave(ir_function *ir);

-   virtual ir_visitor_status visit_enter(ir_function_signature *ir);

-

-   virtual ir_visitor_status visit_leave(ir_expression *ir);

-   virtual ir_visitor_status visit_leave(ir_swizzle *ir);

-

-   virtual ir_visitor_status visit_enter(ir_assignment *ir);

-

-   static void validate_ir(ir_instruction *ir, void *data);

-

-   ir_function *current_function;

-

-   struct hash_table *ht;

-};

-

-

-ir_visitor_status

-ir_validate::visit(ir_dereference_variable *ir)

-{

-   if ((ir->var == NULL) || (ir->var->as_variable() == NULL)) {

-      printf("ir_dereference_variable @ %p does not specify a variable %p\n",

-	     (void *) ir, (void *) ir->var);

-      abort();

-   }

-

-   if (hash_table_find(ht, ir->var) == NULL) {

-      printf("ir_dereference_variable @ %p specifies undeclared variable "

-	     "`%s' @ %p\n",

-	     (void *) ir, ir->var->name, (void *) ir->var);

-      abort();

-   }

-

-   this->validate_ir(ir, this->data);

-

-   return visit_continue;

-}

-

-ir_visitor_status

-ir_validate::visit(ir_if *ir)

-{

-   if (ir->condition->type != glsl_type::bool_type) {

-      printf("ir_if condition %s type instead of bool.\n",

-	     ir->condition->type->name);

-      ir->print();

-      printf("\n");

-      abort();

-   }

-

-   return visit_continue;

-}

-

-

-ir_visitor_status

-ir_validate::visit_leave(ir_loop *ir)

-{

-   if (ir->counter != NULL) {

-      if ((ir->from == NULL) || (ir->from == NULL) || (ir->increment == NULL)) {

-	 printf("ir_loop has invalid loop controls:\n"

-		"    counter:   %p\n"

-		"    from:      %p\n"

-		"    to:        %p\n"

-		"    increment: %p\n",

-		(void *) ir->counter, (void *) ir->from, (void *) ir->to,

-                (void *) ir->increment);

-	 abort();

-      }

-

-      if ((ir->cmp < ir_binop_less) || (ir->cmp > ir_binop_nequal)) {

-	 printf("ir_loop has invalid comparitor %d\n", ir->cmp);

-	 abort();

-      }

-   } else {

-      if ((ir->from != NULL) || (ir->from != NULL) || (ir->increment != NULL)) {

-	 printf("ir_loop has invalid loop controls:\n"

-		"    counter:   %p\n"

-		"    from:      %p\n"

-		"    to:        %p\n"

-		"    increment: %p\n",

-		(void *) ir->counter, (void *) ir->from, (void *) ir->to,

-                (void *) ir->increment);

-	 abort();

-      }

-   }

-

-   return visit_continue;

-}

-

-

-ir_visitor_status

-ir_validate::visit_enter(ir_function *ir)

-{

-   /* Function definitions cannot be nested.

-    */

-   if (this->current_function != NULL) {

-      printf("Function definition nested inside another function "

-	     "definition:\n");

-      printf("%s %p inside %s %p\n",

-	     ir->name, (void *) ir,

-	     this->current_function->name, (void *) this->current_function);

-      abort();

-   }

-

-   /* Store the current function hierarchy being traversed.  This is used

-    * by the function signature visitor to ensure that the signatures are

-    * linked with the correct functions.

-    */

-   this->current_function = ir;

-

-   this->validate_ir(ir, this->data);

-

-   return visit_continue;

-}

-

-ir_visitor_status

-ir_validate::visit_leave(ir_function *ir)

-{

-   assert(talloc_parent(ir->name) == ir);

-

-   this->current_function = NULL;

-   return visit_continue;

-}

-

-ir_visitor_status

-ir_validate::visit_enter(ir_function_signature *ir)

-{

-   if (this->current_function != ir->function()) {

-      printf("Function signature nested inside wrong function "

-	     "definition:\n");

-      printf("%p inside %s %p instead of %s %p\n",

-	     (void *) ir,

-	     this->current_function->name, (void *) this->current_function,

-	     ir->function_name(), (void *) ir->function());

-      abort();

-   }

-

-   this->validate_ir(ir, this->data);

-

-   return visit_continue;

-}

-

-ir_visitor_status

-ir_validate::visit_leave(ir_expression *ir)

-{

-   switch (ir->operation) {

-   case ir_unop_bit_not:

-      assert(ir->operands[0]->type == ir->type);

-      break;

-   case ir_unop_logic_not:

-      assert(ir->type->base_type == GLSL_TYPE_BOOL);

-      assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);

-      break;

-

-   case ir_unop_neg:

-   case ir_unop_abs:

-   case ir_unop_sign:

-   case ir_unop_rcp:

-   case ir_unop_rsq:

-   case ir_unop_sqrt:

-      assert(ir->type == ir->operands[0]->type);

-      break;

-

-   case ir_unop_exp:

-   case ir_unop_log:

-   case ir_unop_exp2:

-   case ir_unop_log2:

-      assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);

-      assert(ir->type == ir->operands[0]->type);

-      break;

-

-   case ir_unop_f2i:

-      assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);

-      assert(ir->type->base_type == GLSL_TYPE_INT);

-      break;

-   case ir_unop_i2f:

-      assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);

-      assert(ir->type->base_type == GLSL_TYPE_FLOAT);

-      break;

-   case ir_unop_f2b:

-      assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);

-      assert(ir->type->base_type == GLSL_TYPE_BOOL);

-      break;

-   case ir_unop_b2f:

-      assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);

-      assert(ir->type->base_type == GLSL_TYPE_FLOAT);

-      break;

-   case ir_unop_i2b:

-      assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);

-      assert(ir->type->base_type == GLSL_TYPE_BOOL);

-      break;

-   case ir_unop_b2i:

-      assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);

-      assert(ir->type->base_type == GLSL_TYPE_INT);

-      break;

-   case ir_unop_u2f:

-      assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);

-      assert(ir->type->base_type == GLSL_TYPE_FLOAT);

-      break;

-

-   case ir_unop_any:

-      assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);

-      assert(ir->type == glsl_type::bool_type);

-      break;

-

-   case ir_unop_trunc:

-   case ir_unop_round_even:

-   case ir_unop_ceil:

-   case ir_unop_floor:

-   case ir_unop_fract:

-   case ir_unop_sin:

-   case ir_unop_cos:

-   case ir_unop_sin_reduced:

-   case ir_unop_cos_reduced:

-   case ir_unop_dFdx:

-   case ir_unop_dFdy:

-      assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);

-      assert(ir->operands[0]->type == ir->type);

-      break;

-

-   case ir_unop_noise:

-      /* XXX what can we assert here? */

-      break;

-

-   case ir_binop_add:

-   case ir_binop_sub:

-   case ir_binop_mul:

-   case ir_binop_div:

-   case ir_binop_mod:

-   case ir_binop_min:

-   case ir_binop_max:

-   case ir_binop_pow:

-      if (ir->operands[0]->type->is_scalar())

-	 assert(ir->operands[1]->type == ir->type);

-      else if (ir->operands[1]->type->is_scalar())

-	 assert(ir->operands[0]->type == ir->type);

-      else if (ir->operands[0]->type->is_vector() &&

-	       ir->operands[1]->type->is_vector()) {

-	 assert(ir->operands[0]->type == ir->operands[1]->type);

-	 assert(ir->operands[0]->type == ir->type);

-      }

-      break;

-

-   case ir_binop_less:

-   case ir_binop_greater:

-   case ir_binop_lequal:

-   case ir_binop_gequal:

-   case ir_binop_equal:

-   case ir_binop_nequal:

-      /* The semantics of the IR operators differ from the GLSL <, >, <=, >=,

-       * ==, and != operators.  The IR operators perform a component-wise

-       * comparison on scalar or vector types and return a boolean scalar or

-       * vector type of the same size.

-       */

-      assert(ir->type->base_type == GLSL_TYPE_BOOL);

-      assert(ir->operands[0]->type == ir->operands[1]->type);

-      assert(ir->operands[0]->type->is_vector()

-	     || ir->operands[0]->type->is_scalar());

-      assert(ir->operands[0]->type->vector_elements

-	     == ir->type->vector_elements);

-      break;

-

-   case ir_binop_all_equal:

-   case ir_binop_any_nequal:

-      /* GLSL == and != operate on scalars, vectors, matrices and arrays, and

-       * return a scalar boolean.  The IR matches that.

-       */

-      assert(ir->type == glsl_type::bool_type);

-      assert(ir->operands[0]->type == ir->operands[1]->type);

-      break;

-

-   case ir_binop_lshift:

-   case ir_binop_rshift:

-      assert(ir->operands[0]->type->is_integer() &&

-             ir->operands[1]->type->is_integer());

-      if (ir->operands[0]->type->is_scalar()) {

-          assert(ir->operands[1]->type->is_scalar());

-      }

-      if (ir->operands[0]->type->is_vector() &&

-          ir->operands[1]->type->is_vector()) {

-          assert(ir->operands[0]->type->components() ==

-                 ir->operands[1]->type->components());

-      }

-      assert(ir->type == ir->operands[0]->type);

-      break;

-

-   case ir_binop_bit_and:

-   case ir_binop_bit_xor:

-   case ir_binop_bit_or:

-       assert(ir->operands[0]->type->base_type ==

-              ir->operands[1]->type->base_type);

-       assert(ir->type->is_integer());

-       if (ir->operands[0]->type->is_vector() &&

-           ir->operands[1]->type->is_vector()) {

-           assert(ir->operands[0]->type->vector_elements ==

-                  ir->operands[1]->type->vector_elements);

-       }

-       break;

-

-   case ir_binop_logic_and:

-   case ir_binop_logic_xor:

-   case ir_binop_logic_or:

-      assert(ir->type == glsl_type::bool_type);

-      assert(ir->operands[0]->type == glsl_type::bool_type);

-      assert(ir->operands[1]->type == glsl_type::bool_type);

-      break;

-

-   case ir_binop_dot:

-      assert(ir->type == glsl_type::float_type);

-      assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);

-      assert(ir->operands[0]->type->is_vector());

-      assert(ir->operands[0]->type == ir->operands[1]->type);

-      break;

-

-   case ir_quadop_vector:

-      /* The vector operator collects some number of scalars and generates a

-       * vector from them.

-       *

-       *  - All of the operands must be scalar.

-       *  - Number of operands must matche the size of the resulting vector.

-       *  - Base type of the operands must match the base type of the result.

-       */

-      assert(ir->type->is_vector());

-      switch (ir->type->vector_elements) {

-      case 2:

-	 assert(ir->operands[0]->type->is_scalar());

-	 assert(ir->operands[0]->type->base_type == ir->type->base_type);

-	 assert(ir->operands[1]->type->is_scalar());

-	 assert(ir->operands[1]->type->base_type == ir->type->base_type);

-	 assert(ir->operands[2] == NULL);

-	 assert(ir->operands[3] == NULL);

-	 break;

-      case 3:

-	 assert(ir->operands[0]->type->is_scalar());

-	 assert(ir->operands[0]->type->base_type == ir->type->base_type);

-	 assert(ir->operands[1]->type->is_scalar());

-	 assert(ir->operands[1]->type->base_type == ir->type->base_type);

-	 assert(ir->operands[2]->type->is_scalar());

-	 assert(ir->operands[2]->type->base_type == ir->type->base_type);

-	 assert(ir->operands[3] == NULL);

-	 break;

-      case 4:

-	 assert(ir->operands[0]->type->is_scalar());

-	 assert(ir->operands[0]->type->base_type == ir->type->base_type);

-	 assert(ir->operands[1]->type->is_scalar());

-	 assert(ir->operands[1]->type->base_type == ir->type->base_type);

-	 assert(ir->operands[2]->type->is_scalar());

-	 assert(ir->operands[2]->type->base_type == ir->type->base_type);

-	 assert(ir->operands[3]->type->is_scalar());

-	 assert(ir->operands[3]->type->base_type == ir->type->base_type);

-	 break;

-      default:

-	 /* The is_vector assertion above should prevent execution from ever

-	  * getting here.

-	  */

-	 assert(!"Should not get here.");

-	 break;

-      }

-   }

-

-   return visit_continue;

-}

-

-ir_visitor_status

-ir_validate::visit_leave(ir_swizzle *ir)

-{

-   int chans[4] = {ir->mask.x, ir->mask.y, ir->mask.z, ir->mask.w};

-

-   for (unsigned int i = 0; i < ir->type->vector_elements; i++) {

-      if (chans[i] >= ir->val->type->vector_elements) {

-	 printf("ir_swizzle @ %p specifies a channel not present "

-		"in the value.\n", (void *) ir);

-	 ir->print();

-	 abort();

-      }

-   }

-

-   return visit_continue;

-}

-

-ir_visitor_status

-ir_validate::visit(ir_variable *ir)

-{

-   /* An ir_variable is the one thing that can (and will) appear multiple times

-    * in an IR tree.  It is added to the hashtable so that it can be used

-    * in the ir_dereference_variable handler to ensure that a variable is

-    * declared before it is dereferenced.

-    */

-   if (ir->name)

-      assert(talloc_parent(ir->name) == ir);

-

-   hash_table_insert(ht, ir, ir);

-   return visit_continue;

-}

-

-ir_visitor_status

-ir_validate::visit_enter(ir_assignment *ir)

-{

-   const ir_dereference *const lhs = ir->lhs;

-   if (lhs->type->is_scalar() || lhs->type->is_vector()) {

-      if (ir->write_mask == 0) {

-	 printf("Assignment LHS is %s, but write mask is 0:\n",

-		lhs->type->is_scalar() ? "scalar" : "vector");

-	 ir->print();

-	 abort();

-      }

-

-      int lhs_components = 0;

-      for (int i = 0; i < 4; i++) {

-	 if (ir->write_mask & (1 << i))

-	    lhs_components++;

-      }

-

-      if (lhs_components != ir->rhs->type->vector_elements) {

-	 printf("Assignment count of LHS write mask channels enabled not\n"

-		"matching RHS vector size (%d LHS, %d RHS).\n",

-		lhs_components, ir->rhs->type->vector_elements);

-	 ir->print();

-	 abort();

-      }

-   }

-

-   this->validate_ir(ir, this->data);

-

-   return visit_continue;

-}

-

-void

-ir_validate::validate_ir(ir_instruction *ir, void *data)

-{

-   struct hash_table *ht = (struct hash_table *) data;

-

-   if (hash_table_find(ht, ir)) {

-      printf("Instruction node present twice in ir tree:\n");

-      ir->print();

-      printf("\n");

-      abort();

-   }

-   hash_table_insert(ht, ir, ir);

-}

-

-void

-check_node_type(ir_instruction *ir, void *data)

-{

-   (void) data;

-

-   if (ir->ir_type <= ir_type_unset || ir->ir_type >= ir_type_max) {

-      printf("Instruction node with unset type\n");

-      ir->print(); printf("\n");

-   }

-   assert(ir->type != glsl_type::error_type);

-}

-

-void

-validate_ir_tree(exec_list *instructions)

-{

-   ir_validate v;

-

-   v.run(instructions);

-

-   foreach_iter(exec_list_iterator, iter, *instructions) {

-      ir_instruction *ir = (ir_instruction *)iter.get();

-

-      visit_tree(ir, check_node_type, NULL);

-   }

-}

+/*
+ * 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 ir_validate.cpp
+ *
+ * Attempts to verify that various invariants of the IR tree are true.
+ *
+ * In particular, at the moment it makes sure that no single
+ * ir_instruction node except for ir_variable appears multiple times
+ * in the ir tree.  ir_variable does appear multiple times: Once as a
+ * declaration in an exec_list, and multiple times as the endpoint of
+ * a dereference chain.
+ */
+
+#include <inttypes.h>
+#include "ir.h"
+#include "ir_hierarchical_visitor.h"
+#include "program/hash_table.h"
+#include "glsl_types.h"
+
+class ir_validate : public ir_hierarchical_visitor {
+public:
+   ir_validate()
+   {
+      this->ht = hash_table_ctor(0, hash_table_pointer_hash,
+				 hash_table_pointer_compare);
+
+      this->current_function = NULL;
+
+      this->callback = ir_validate::validate_ir;
+      this->data = ht;
+   }
+
+   ~ir_validate()
+   {
+      hash_table_dtor(this->ht);
+   }
+
+   virtual ir_visitor_status visit(ir_variable *v);
+   virtual ir_visitor_status visit(ir_dereference_variable *ir);
+   virtual ir_visitor_status visit(ir_if *ir);
+
+   virtual ir_visitor_status visit_leave(ir_loop *ir);
+   virtual ir_visitor_status visit_enter(ir_function *ir);
+   virtual ir_visitor_status visit_leave(ir_function *ir);
+   virtual ir_visitor_status visit_enter(ir_function_signature *ir);
+
+   virtual ir_visitor_status visit_leave(ir_expression *ir);
+   virtual ir_visitor_status visit_leave(ir_swizzle *ir);
+
+   virtual ir_visitor_status visit_enter(ir_assignment *ir);
+
+   static void validate_ir(ir_instruction *ir, void *data);
+
+   ir_function *current_function;
+
+   struct hash_table *ht;
+};
+
+
+ir_visitor_status
+ir_validate::visit(ir_dereference_variable *ir)
+{
+   if ((ir->var == NULL) || (ir->var->as_variable() == NULL)) {
+      printf("ir_dereference_variable @ %p does not specify a variable %p\n",
+	     (void *) ir, (void *) ir->var);
+      abort();
+   }
+
+   if (hash_table_find(ht, ir->var) == NULL) {
+      printf("ir_dereference_variable @ %p specifies undeclared variable "
+	     "`%s' @ %p\n",
+	     (void *) ir, ir->var->name, (void *) ir->var);
+      abort();
+   }
+
+   this->validate_ir(ir, this->data);
+
+   return visit_continue;
+}
+
+ir_visitor_status
+ir_validate::visit(ir_if *ir)
+{
+   if (ir->condition->type != glsl_type::bool_type) {
+      printf("ir_if condition %s type instead of bool.\n",
+	     ir->condition->type->name);
+      ir->print();
+      printf("\n");
+      abort();
+   }
+
+   return visit_continue;
+}
+
+
+ir_visitor_status
+ir_validate::visit_leave(ir_loop *ir)
+{
+   if (ir->counter != NULL) {
+      if ((ir->from == NULL) || (ir->from == NULL) || (ir->increment == NULL)) {
+	 printf("ir_loop has invalid loop controls:\n"
+		"    counter:   %p\n"
+		"    from:      %p\n"
+		"    to:        %p\n"
+		"    increment: %p\n",
+		(void *) ir->counter, (void *) ir->from, (void *) ir->to,
+                (void *) ir->increment);
+	 abort();
+      }
+
+      if ((ir->cmp < ir_binop_less) || (ir->cmp > ir_binop_nequal)) {
+	 printf("ir_loop has invalid comparitor %d\n", ir->cmp);
+	 abort();
+      }
+   } else {
+      if ((ir->from != NULL) || (ir->from != NULL) || (ir->increment != NULL)) {
+	 printf("ir_loop has invalid loop controls:\n"
+		"    counter:   %p\n"
+		"    from:      %p\n"
+		"    to:        %p\n"
+		"    increment: %p\n",
+		(void *) ir->counter, (void *) ir->from, (void *) ir->to,
+                (void *) ir->increment);
+	 abort();
+      }
+   }
+
+   return visit_continue;
+}
+
+
+ir_visitor_status
+ir_validate::visit_enter(ir_function *ir)
+{
+   /* Function definitions cannot be nested.
+    */
+   if (this->current_function != NULL) {
+      printf("Function definition nested inside another function "
+	     "definition:\n");
+      printf("%s %p inside %s %p\n",
+	     ir->name, (void *) ir,
+	     this->current_function->name, (void *) this->current_function);
+      abort();
+   }
+
+   /* Store the current function hierarchy being traversed.  This is used
+    * by the function signature visitor to ensure that the signatures are
+    * linked with the correct functions.
+    */
+   this->current_function = ir;
+
+   this->validate_ir(ir, this->data);
+
+   return visit_continue;
+}
+
+ir_visitor_status
+ir_validate::visit_leave(ir_function *ir)
+{
+   assert(ralloc_parent(ir->name) == ir);
+
+   this->current_function = NULL;
+   return visit_continue;
+}
+
+ir_visitor_status
+ir_validate::visit_enter(ir_function_signature *ir)
+{
+   if (this->current_function != ir->function()) {
+      printf("Function signature nested inside wrong function "
+	     "definition:\n");
+      printf("%p inside %s %p instead of %s %p\n",
+	     (void *) ir,
+	     this->current_function->name, (void *) this->current_function,
+	     ir->function_name(), (void *) ir->function());
+      abort();
+   }
+
+   this->validate_ir(ir, this->data);
+
+   return visit_continue;
+}
+
+ir_visitor_status
+ir_validate::visit_leave(ir_expression *ir)
+{
+   switch (ir->operation) {
+   case ir_unop_bit_not:
+      assert(ir->operands[0]->type == ir->type);
+      break;
+   case ir_unop_logic_not:
+      assert(ir->type->base_type == GLSL_TYPE_BOOL);
+      assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
+      break;
+
+   case ir_unop_neg:
+   case ir_unop_abs:
+   case ir_unop_sign:
+   case ir_unop_rcp:
+   case ir_unop_rsq:
+   case ir_unop_sqrt:
+      assert(ir->type == ir->operands[0]->type);
+      break;
+
+   case ir_unop_exp:
+   case ir_unop_log:
+   case ir_unop_exp2:
+   case ir_unop_log2:
+      assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
+      assert(ir->type == ir->operands[0]->type);
+      break;
+
+   case ir_unop_f2i:
+      assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
+      assert(ir->type->base_type == GLSL_TYPE_INT);
+      break;
+   case ir_unop_i2f:
+      assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
+      assert(ir->type->base_type == GLSL_TYPE_FLOAT);
+      break;
+   case ir_unop_f2b:
+      assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
+      assert(ir->type->base_type == GLSL_TYPE_BOOL);
+      break;
+   case ir_unop_b2f:
+      assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
+      assert(ir->type->base_type == GLSL_TYPE_FLOAT);
+      break;
+   case ir_unop_i2b:
+      assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
+      assert(ir->type->base_type == GLSL_TYPE_BOOL);
+      break;
+   case ir_unop_b2i:
+      assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
+      assert(ir->type->base_type == GLSL_TYPE_INT);
+      break;
+   case ir_unop_u2f:
+      assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
+      assert(ir->type->base_type == GLSL_TYPE_FLOAT);
+      break;
+
+   case ir_unop_any:
+      assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
+      assert(ir->type == glsl_type::bool_type);
+      break;
+
+   case ir_unop_trunc:
+   case ir_unop_round_even:
+   case ir_unop_ceil:
+   case ir_unop_floor:
+   case ir_unop_fract:
+   case ir_unop_sin:
+   case ir_unop_cos:
+   case ir_unop_sin_reduced:
+   case ir_unop_cos_reduced:
+   case ir_unop_dFdx:
+   case ir_unop_dFdy:
+      assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
+      assert(ir->operands[0]->type == ir->type);
+      break;
+
+   case ir_unop_noise:
+      /* XXX what can we assert here? */
+      break;
+
+   case ir_binop_add:
+   case ir_binop_sub:
+   case ir_binop_mul:
+   case ir_binop_div:
+   case ir_binop_mod:
+   case ir_binop_min:
+   case ir_binop_max:
+   case ir_binop_pow:
+      if (ir->operands[0]->type->is_scalar())
+	 assert(ir->operands[1]->type == ir->type);
+      else if (ir->operands[1]->type->is_scalar())
+	 assert(ir->operands[0]->type == ir->type);
+      else if (ir->operands[0]->type->is_vector() &&
+	       ir->operands[1]->type->is_vector()) {
+	 assert(ir->operands[0]->type == ir->operands[1]->type);
+	 assert(ir->operands[0]->type == ir->type);
+      }
+      break;
+
+   case ir_binop_less:
+   case ir_binop_greater:
+   case ir_binop_lequal:
+   case ir_binop_gequal:
+   case ir_binop_equal:
+   case ir_binop_nequal:
+      /* The semantics of the IR operators differ from the GLSL <, >, <=, >=,
+       * ==, and != operators.  The IR operators perform a component-wise
+       * comparison on scalar or vector types and return a boolean scalar or
+       * vector type of the same size.
+       */
+      assert(ir->type->base_type == GLSL_TYPE_BOOL);
+      assert(ir->operands[0]->type == ir->operands[1]->type);
+      assert(ir->operands[0]->type->is_vector()
+	     || ir->operands[0]->type->is_scalar());
+      assert(ir->operands[0]->type->vector_elements
+	     == ir->type->vector_elements);
+      break;
+
+   case ir_binop_all_equal:
+   case ir_binop_any_nequal:
+      /* GLSL == and != operate on scalars, vectors, matrices and arrays, and
+       * return a scalar boolean.  The IR matches that.
+       */
+      assert(ir->type == glsl_type::bool_type);
+      assert(ir->operands[0]->type == ir->operands[1]->type);
+      break;
+
+   case ir_binop_lshift:
+   case ir_binop_rshift:
+      assert(ir->operands[0]->type->is_integer() &&
+             ir->operands[1]->type->is_integer());
+      if (ir->operands[0]->type->is_scalar()) {
+          assert(ir->operands[1]->type->is_scalar());
+      }
+      if (ir->operands[0]->type->is_vector() &&
+          ir->operands[1]->type->is_vector()) {
+          assert(ir->operands[0]->type->components() ==
+                 ir->operands[1]->type->components());
+      }
+      assert(ir->type == ir->operands[0]->type);
+      break;
+
+   case ir_binop_bit_and:
+   case ir_binop_bit_xor:
+   case ir_binop_bit_or:
+       assert(ir->operands[0]->type->base_type ==
+              ir->operands[1]->type->base_type);
+       assert(ir->type->is_integer());
+       if (ir->operands[0]->type->is_vector() &&
+           ir->operands[1]->type->is_vector()) {
+           assert(ir->operands[0]->type->vector_elements ==
+                  ir->operands[1]->type->vector_elements);
+       }
+       break;
+
+   case ir_binop_logic_and:
+   case ir_binop_logic_xor:
+   case ir_binop_logic_or:
+      assert(ir->type == glsl_type::bool_type);
+      assert(ir->operands[0]->type == glsl_type::bool_type);
+      assert(ir->operands[1]->type == glsl_type::bool_type);
+      break;
+
+   case ir_binop_dot:
+      assert(ir->type == glsl_type::float_type);
+      assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
+      assert(ir->operands[0]->type->is_vector());
+      assert(ir->operands[0]->type == ir->operands[1]->type);
+      break;
+
+   case ir_quadop_vector:
+      /* The vector operator collects some number of scalars and generates a
+       * vector from them.
+       *
+       *  - All of the operands must be scalar.
+       *  - Number of operands must matche the size of the resulting vector.
+       *  - Base type of the operands must match the base type of the result.
+       */
+      assert(ir->type->is_vector());
+      switch (ir->type->vector_elements) {
+      case 2:
+	 assert(ir->operands[0]->type->is_scalar());
+	 assert(ir->operands[0]->type->base_type == ir->type->base_type);
+	 assert(ir->operands[1]->type->is_scalar());
+	 assert(ir->operands[1]->type->base_type == ir->type->base_type);
+	 assert(ir->operands[2] == NULL);
+	 assert(ir->operands[3] == NULL);
+	 break;
+      case 3:
+	 assert(ir->operands[0]->type->is_scalar());
+	 assert(ir->operands[0]->type->base_type == ir->type->base_type);
+	 assert(ir->operands[1]->type->is_scalar());
+	 assert(ir->operands[1]->type->base_type == ir->type->base_type);
+	 assert(ir->operands[2]->type->is_scalar());
+	 assert(ir->operands[2]->type->base_type == ir->type->base_type);
+	 assert(ir->operands[3] == NULL);
+	 break;
+      case 4:
+	 assert(ir->operands[0]->type->is_scalar());
+	 assert(ir->operands[0]->type->base_type == ir->type->base_type);
+	 assert(ir->operands[1]->type->is_scalar());
+	 assert(ir->operands[1]->type->base_type == ir->type->base_type);
+	 assert(ir->operands[2]->type->is_scalar());
+	 assert(ir->operands[2]->type->base_type == ir->type->base_type);
+	 assert(ir->operands[3]->type->is_scalar());
+	 assert(ir->operands[3]->type->base_type == ir->type->base_type);
+	 break;
+      default:
+	 /* The is_vector assertion above should prevent execution from ever
+	  * getting here.
+	  */
+	 assert(!"Should not get here.");
+	 break;
+      }
+   }
+
+   return visit_continue;
+}
+
+ir_visitor_status
+ir_validate::visit_leave(ir_swizzle *ir)
+{
+   int chans[4] = {ir->mask.x, ir->mask.y, ir->mask.z, ir->mask.w};
+
+   for (unsigned int i = 0; i < ir->type->vector_elements; i++) {
+      if (chans[i] >= ir->val->type->vector_elements) {
+	 printf("ir_swizzle @ %p specifies a channel not present "
+		"in the value.\n", (void *) ir);
+	 ir->print();
+	 abort();
+      }
+   }
+
+   return visit_continue;
+}
+
+ir_visitor_status
+ir_validate::visit(ir_variable *ir)
+{
+   /* An ir_variable is the one thing that can (and will) appear multiple times
+    * in an IR tree.  It is added to the hashtable so that it can be used
+    * in the ir_dereference_variable handler to ensure that a variable is
+    * declared before it is dereferenced.
+    */
+   if (ir->name)
+      assert(ralloc_parent(ir->name) == ir);
+
+   hash_table_insert(ht, ir, ir);
+   return visit_continue;
+}
+
+ir_visitor_status
+ir_validate::visit_enter(ir_assignment *ir)
+{
+   const ir_dereference *const lhs = ir->lhs;
+   if (lhs->type->is_scalar() || lhs->type->is_vector()) {
+      if (ir->write_mask == 0) {
+	 printf("Assignment LHS is %s, but write mask is 0:\n",
+		lhs->type->is_scalar() ? "scalar" : "vector");
+	 ir->print();
+	 abort();
+      }
+
+      int lhs_components = 0;
+      for (int i = 0; i < 4; i++) {
+	 if (ir->write_mask & (1 << i))
+	    lhs_components++;
+      }
+
+      if (lhs_components != ir->rhs->type->vector_elements) {
+	 printf("Assignment count of LHS write mask channels enabled not\n"
+		"matching RHS vector size (%d LHS, %d RHS).\n",
+		lhs_components, ir->rhs->type->vector_elements);
+	 ir->print();
+	 abort();
+      }
+   }
+
+   this->validate_ir(ir, this->data);
+
+   return visit_continue;
+}
+
+void
+ir_validate::validate_ir(ir_instruction *ir, void *data)
+{
+   struct hash_table *ht = (struct hash_table *) data;
+
+   if (hash_table_find(ht, ir)) {
+      printf("Instruction node present twice in ir tree:\n");
+      ir->print();
+      printf("\n");
+      abort();
+   }
+   hash_table_insert(ht, ir, ir);
+}
+
+void
+check_node_type(ir_instruction *ir, void *data)
+{
+   (void) data;
+
+   if (ir->ir_type <= ir_type_unset || ir->ir_type >= ir_type_max) {
+      printf("Instruction node with unset type\n");
+      ir->print(); printf("\n");
+   }
+   assert(ir->type != glsl_type::error_type);
+}
+
+void
+validate_ir_tree(exec_list *instructions)
+{
+   ir_validate v;
+
+   v.run(instructions);
+
+   foreach_iter(exec_list_iterator, iter, *instructions) {
+      ir_instruction *ir = (ir_instruction *)iter.get();
+
+      visit_tree(ir, check_node_type, NULL);
+   }
+}