ast_node: Add new talloc-based new()

And use the talloc-based new for all of the ast objects created by the
parser.  This closes a lot of memory leaks, and will allow us to use
these ast objects as talloc parents in the future, (for things like
exec_nodes, etc.).

This closes 164 leaks in the glsl-orangebook-ch06-bump.frag test:

	total heap usage: 55,623 allocs, 14,553 frees
	(was 14,389 frees)

2 files changed, 211 insertions, 105 deletions

diff --git a/ast.h b/ast.h
index 782e2c7..de300e7 100644
--- a/ast.h
+++ b/ast.h
@@ -36,6 +36,25 @@ struct YYLTYPE;
 
 class ast_node {
 public:
+   /* Callers of this talloc-based new need not call delete. It's
+    * easier to just talloc_free 'ctx' (or any of its ancestors). */
+   static void* operator new(size_t size, void *ctx)
+   {
+      void *node;
+
+      node = talloc_size(ctx, size);
+      assert(node != NULL);
+
+      return node;
+   }
+
+   /* If the user *does* call delete, that's OK, we will just
+    * talloc_free in that case. */
+   static void operator delete(void *table)
+   {
+      talloc_free(table);
+   }
+
    virtual void print(void) const;
    virtual ir_rvalue *hir(exec_list *instructions,
 			  struct _mesa_glsl_parse_state *state);
diff --git a/glsl_parser.ypp b/glsl_parser.ypp
index ae009ed..4132495 100644
--- a/glsl_parser.ypp
+++ b/glsl_parser.ypp
@@ -255,31 +255,36 @@ variable_identifier:
 primary_expression:
 	variable_identifier
 	{
-	   $$ = new ast_expression(ast_identifier, NULL, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression(ast_identifier, NULL, NULL, NULL);
 	   $$->set_location(yylloc);
 	   $$->primary_expression.identifier = $1;
 	}
 	| INTCONSTANT
 	{
-	   $$ = new ast_expression(ast_int_constant, NULL, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression(ast_int_constant, NULL, NULL, NULL);
 	   $$->set_location(yylloc);
 	   $$->primary_expression.int_constant = $1;
 	}
 	| UINTCONSTANT
 	{
-	   $$ = new ast_expression(ast_uint_constant, NULL, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression(ast_uint_constant, NULL, NULL, NULL);
 	   $$->set_location(yylloc);
 	   $$->primary_expression.uint_constant = $1;
 	}
 	| FLOATCONSTANT
 	{
-	   $$ = new ast_expression(ast_float_constant, NULL, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression(ast_float_constant, NULL, NULL, NULL);
 	   $$->set_location(yylloc);
 	   $$->primary_expression.float_constant = $1;
 	}
 	| BOOLCONSTANT
 	{
-	   $$ = new ast_expression(ast_bool_constant, NULL, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression(ast_bool_constant, NULL, NULL, NULL);
 	   $$->set_location(yylloc);
 	   $$->primary_expression.bool_constant = $1;
 	}
@@ -293,7 +298,8 @@ postfix_expression:
 	primary_expression
 	| postfix_expression '[' integer_expression ']'
 	{
-	   $$ = new ast_expression(ast_array_index, $1, $3, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression(ast_array_index, $1, $3, NULL);
 	   $$->set_location(yylloc);
 	}
 	| function_call
@@ -308,18 +314,21 @@ postfix_expression:
 	}
 	| postfix_expression '.' IDENTIFIER
 	{
-	   $$ = new ast_expression(ast_field_selection, $1, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression(ast_field_selection, $1, NULL, NULL);
 	   $$->set_location(yylloc);
 	   $$->primary_expression.identifier = $3;
 	}
 	| postfix_expression INC_OP
 	{
-	   $$ = new ast_expression(ast_post_inc, $1, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression(ast_post_inc, $1, NULL, NULL);
 	   $$->set_location(yylloc);
 	}
 	| postfix_expression DEC_OP
 	{
-	   $$ = new ast_expression(ast_post_dec, $1, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression(ast_post_dec, $1, NULL, NULL);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -336,7 +345,8 @@ function_call_or_method:
 	function_call_generic
 	| postfix_expression '.' function_call_generic
 	{
-	   $$ = new ast_expression(ast_field_selection, $1, $3, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression(ast_field_selection, $1, $3, NULL);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -376,19 +386,22 @@ function_call_header:
 function_identifier:
 	type_specifier
 	{
-	   $$ = new ast_function_expression($1);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_function_expression($1);
 	   $$->set_location(yylloc);
    	}
 	| IDENTIFIER
 	{
-	   ast_expression *callee = new ast_expression($1);
-	   $$ = new ast_function_expression(callee);
+	   void *ctx = talloc_parent(state);
+	   ast_expression *callee = new(ctx) ast_expression($1);
+	   $$ = new(ctx) ast_function_expression(callee);
 	   $$->set_location(yylloc);
    	}
 	| FIELD_SELECTION
 	{
-	   ast_expression *callee = new ast_expression($1);
-	   $$ = new ast_function_expression(callee);
+	   void *ctx = talloc_parent(state);
+	   ast_expression *callee = new(ctx) ast_expression($1);
+	   $$ = new(ctx) ast_function_expression(callee);
 	   $$->set_location(yylloc);
    	}
 	;
@@ -398,17 +411,20 @@ unary_expression:
 	postfix_expression
 	| INC_OP unary_expression
 	{
-	   $$ = new ast_expression(ast_pre_inc, $2, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression(ast_pre_inc, $2, NULL, NULL);
 	   $$->set_location(yylloc);
 	}
 	| DEC_OP unary_expression
 	{
-	   $$ = new ast_expression(ast_pre_dec, $2, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression(ast_pre_dec, $2, NULL, NULL);
 	   $$->set_location(yylloc);
 	}
 	| unary_operator unary_expression
 	{
-	   $$ = new ast_expression($1, $2, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression($1, $2, NULL, NULL);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -425,17 +441,20 @@ multiplicative_expression:
 	unary_expression
 	| multiplicative_expression '*' unary_expression
 	{
-	   $$ = new ast_expression_bin(ast_mul, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_mul, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	| multiplicative_expression '/' unary_expression
 	{
-	   $$ = new ast_expression_bin(ast_div, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_div, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	| multiplicative_expression '%' unary_expression
 	{
-	   $$ = new ast_expression_bin(ast_mod, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_mod, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -444,12 +463,14 @@ additive_expression:
 	multiplicative_expression
 	| additive_expression '+' multiplicative_expression
 	{
-	   $$ = new ast_expression_bin(ast_add, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_add, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	| additive_expression '-' multiplicative_expression
 	{
-	   $$ = new ast_expression_bin(ast_sub, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_sub, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -458,12 +479,14 @@ shift_expression:
 	additive_expression
 	| shift_expression LEFT_OP additive_expression
 	{
-	   $$ = new ast_expression_bin(ast_lshift, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_lshift, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	| shift_expression RIGHT_OP additive_expression
 	{
-	   $$ = new ast_expression_bin(ast_rshift, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_rshift, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -472,22 +495,26 @@ relational_expression:
 	shift_expression
 	| relational_expression '<' shift_expression
 	{
-	   $$ = new ast_expression_bin(ast_less, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_less, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	| relational_expression '>' shift_expression
 	{
-	   $$ = new ast_expression_bin(ast_greater, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_greater, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	| relational_expression LE_OP shift_expression
 	{
-	   $$ = new ast_expression_bin(ast_lequal, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_lequal, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	| relational_expression GE_OP shift_expression
 	{
-	   $$ = new ast_expression_bin(ast_gequal, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_gequal, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -496,12 +523,14 @@ equality_expression:
 	relational_expression
 	| equality_expression EQ_OP relational_expression
 	{
-	   $$ = new ast_expression_bin(ast_equal, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_equal, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	| equality_expression NE_OP relational_expression
 	{
-	   $$ = new ast_expression_bin(ast_nequal, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_nequal, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -510,7 +539,8 @@ and_expression:
 	equality_expression
 	| and_expression '&' equality_expression
 	{
-	   $$ = new ast_expression_bin(ast_bit_or, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_bit_or, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -519,7 +549,8 @@ exclusive_or_expression:
 	and_expression
 	| exclusive_or_expression '^' and_expression
 	{
-	   $$ = new ast_expression_bin(ast_bit_xor, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_bit_xor, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -528,7 +559,8 @@ inclusive_or_expression:
 	exclusive_or_expression
 	| inclusive_or_expression '|' exclusive_or_expression
 	{
-	   $$ = new ast_expression_bin(ast_bit_or, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_bit_or, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -537,7 +569,8 @@ logical_and_expression:
 	inclusive_or_expression
 	| logical_and_expression AND_OP inclusive_or_expression
 	{
-	   $$ = new ast_expression_bin(ast_logic_and, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_logic_and, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -546,7 +579,8 @@ logical_xor_expression:
 	logical_and_expression
 	| logical_xor_expression XOR_OP logical_and_expression
 	{
-	   $$ = new ast_expression_bin(ast_logic_xor, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_logic_xor, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -555,7 +589,8 @@ logical_or_expression:
 	logical_xor_expression
 	| logical_or_expression OR_OP logical_xor_expression
 	{
-	   $$ = new ast_expression_bin(ast_logic_or, $1, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_bin(ast_logic_or, $1, $3);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -564,7 +599,8 @@ conditional_expression:
 	logical_or_expression
 	| logical_or_expression '?' expression ':' assignment_expression
 	{
-	   $$ = new ast_expression(ast_conditional, $1, $3, $5);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression(ast_conditional, $1, $3, $5);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -573,7 +609,8 @@ assignment_expression:
 	conditional_expression
 	| unary_expression assignment_operator assignment_expression
 	{
-	   $$ = new ast_expression($2, $1, $3, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression($2, $1, $3, NULL);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -599,8 +636,9 @@ expression:
 	}
 	| expression ',' assignment_expression
 	{
+	   void *ctx = talloc_parent(state);
 	   if ($1->oper != ast_sequence) {
-	      $$ = new ast_expression(ast_sequence, NULL, NULL, NULL);
+	      $$ = new(ctx) ast_expression(ast_sequence, NULL, NULL, NULL);
 	      $$->set_location(yylloc);
 	      $$->expressions.push_tail(& $1->link);
 	   } else {
@@ -662,7 +700,8 @@ function_header_with_parameters:
 function_header:
 	fully_specified_type IDENTIFIER '('
 	{
-	   $$ = new ast_function();
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_function();
 	   $$->set_location(yylloc);
 	   $$->return_type = $1;
 	   $$->identifier = $2;
@@ -672,18 +711,20 @@ function_header:
 parameter_declarator:
 	type_specifier IDENTIFIER
 	{
-	   $$ = new ast_parameter_declarator();
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_parameter_declarator();
 	   $$->set_location(yylloc);
-	   $$->type = new ast_fully_specified_type();
+	   $$->type = new(ctx) ast_fully_specified_type();
 	   $$->type->set_location(yylloc);
 	   $$->type->specifier = $1;
 	   $$->identifier = $2;
 	}
 	| type_specifier IDENTIFIER '[' constant_expression ']'
 	{
-	   $$ = new ast_parameter_declarator();
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_parameter_declarator();
 	   $$->set_location(yylloc);
-	   $$->type = new ast_fully_specified_type();
+	   $$->type = new(ctx) ast_fully_specified_type();
 	   $$->type->set_location(yylloc);
 	   $$->type->specifier = $1;
 	   $$->identifier = $2;
@@ -707,19 +748,21 @@ parameter_declaration:
 	}
 	| parameter_type_qualifier parameter_qualifier parameter_type_specifier
 	{
+	   void *ctx = talloc_parent(state);
 	   $1.i |= $2.i;
 
-	   $$ = new ast_parameter_declarator();
+	   $$ = new(ctx) ast_parameter_declarator();
 	   $$->set_location(yylloc);
-	   $$->type = new ast_fully_specified_type();
+	   $$->type = new(ctx) ast_fully_specified_type();
 	   $$->type->qualifier = $1.q;
 	   $$->type->specifier = $3;
 	}
 	| parameter_qualifier parameter_type_specifier
 	{
-	   $$ = new ast_parameter_declarator();
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_parameter_declarator();
 	   $$->set_location(yylloc);
-	   $$->type = new ast_fully_specified_type();
+	   $$->type = new(ctx) ast_fully_specified_type();
 	   $$->type->qualifier = $1.q;
 	   $$->type->specifier = $2;
 	}
@@ -740,7 +783,8 @@ init_declarator_list:
 	single_declaration
 	| init_declarator_list ',' IDENTIFIER
 	{
-	   ast_declaration *decl = new ast_declaration($3, false, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   ast_declaration *decl = new(ctx) ast_declaration($3, false, NULL, NULL);
 	   decl->set_location(yylloc);
 
 	   $$ = $1;
@@ -748,7 +792,8 @@ init_declarator_list:
 	}
 	| init_declarator_list ',' IDENTIFIER '[' ']'
 	{
-	   ast_declaration *decl = new ast_declaration($3, true, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   ast_declaration *decl = new(ctx) ast_declaration($3, true, NULL, NULL);
 	   decl->set_location(yylloc);
 
 	   $$ = $1;
@@ -756,7 +801,8 @@ init_declarator_list:
 	}
 	| init_declarator_list ',' IDENTIFIER '[' constant_expression ']'
 	{
-	   ast_declaration *decl = new ast_declaration($3, true, $5, NULL);
+	   void *ctx = talloc_parent(state);
+	   ast_declaration *decl = new(ctx) ast_declaration($3, true, $5, NULL);
 	   decl->set_location(yylloc);
 
 	   $$ = $1;
@@ -764,7 +810,8 @@ init_declarator_list:
 	}
 	| init_declarator_list ',' IDENTIFIER '[' ']' '=' initializer
 	{
-	   ast_declaration *decl = new ast_declaration($3, true, NULL, $7);
+	   void *ctx = talloc_parent(state);
+	   ast_declaration *decl = new(ctx) ast_declaration($3, true, NULL, $7);
 	   decl->set_location(yylloc);
 
 	   $$ = $1;
@@ -772,7 +819,8 @@ init_declarator_list:
 	}
 	| init_declarator_list ',' IDENTIFIER '[' constant_expression ']' '=' initializer
 	{
-	   ast_declaration *decl = new ast_declaration($3, true, $5, $8);
+	   void *ctx = talloc_parent(state);
+	   ast_declaration *decl = new(ctx) ast_declaration($3, true, $5, $8);
 	   decl->set_location(yylloc);
 
 	   $$ = $1;
@@ -780,7 +828,8 @@ init_declarator_list:
 	}
 	| init_declarator_list ',' IDENTIFIER '=' initializer
 	{
-	   ast_declaration *decl = new ast_declaration($3, false, NULL, $5);
+	   void *ctx = talloc_parent(state);
+	   ast_declaration *decl = new(ctx) ast_declaration($3, false, NULL, $5);
 	   decl->set_location(yylloc);
 
 	   $$ = $1;
@@ -792,67 +841,75 @@ init_declarator_list:
 single_declaration:
 	fully_specified_type
 	{
+	   void *ctx = talloc_parent(state);
 	   if ($1->specifier->type_specifier != ast_struct) {
 	      _mesa_glsl_error(& @1, state, "empty declaration list\n");
 	      YYERROR;
 	   } else {
-	      $$ = new ast_declarator_list($1);
+	      $$ = new(ctx) ast_declarator_list($1);
 	      $$->set_location(yylloc);
 	   }
 	}
 	| fully_specified_type IDENTIFIER
 	{
-	   ast_declaration *decl = new ast_declaration($2, false, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   ast_declaration *decl = new(ctx) ast_declaration($2, false, NULL, NULL);
 
-	   $$ = new ast_declarator_list($1);
+	   $$ = new(ctx) ast_declarator_list($1);
 	   $$->set_location(yylloc);
 	   $$->declarations.push_tail(&decl->link);
 	}
 	| fully_specified_type IDENTIFIER '[' ']'
 	{
-	   ast_declaration *decl = new ast_declaration($2, true, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   ast_declaration *decl = new(ctx) ast_declaration($2, true, NULL, NULL);
 
-	   $$ = new ast_declarator_list($1);
+	   $$ = new(ctx) ast_declarator_list($1);
 	   $$->set_location(yylloc);
 	   $$->declarations.push_tail(&decl->link);
 	}
 	| fully_specified_type IDENTIFIER '[' constant_expression ']'
 	{
-	   ast_declaration *decl = new ast_declaration($2, true, $4, NULL);
+	   void *ctx = talloc_parent(state);
+	   ast_declaration *decl = new(ctx) ast_declaration($2, true, $4, NULL);
 
-	   $$ = new ast_declarator_list($1);
+	   $$ = new(ctx) ast_declarator_list($1);
 	   $$->set_location(yylloc);
 	   $$->declarations.push_tail(&decl->link);
 	}
 	| fully_specified_type IDENTIFIER '[' ']' '=' initializer
 	{
-	   ast_declaration *decl = new ast_declaration($2, true, NULL, $6);
+	   void *ctx = talloc_parent(state);
+	   ast_declaration *decl = new(ctx) ast_declaration($2, true, NULL, $6);
 
-	   $$ = new ast_declarator_list($1);
+	   $$ = new(ctx) ast_declarator_list($1);
 	   $$->set_location(yylloc);
 	   $$->declarations.push_tail(&decl->link);
 	}
 	| fully_specified_type IDENTIFIER '[' constant_expression ']' '=' initializer
 	{
-	   ast_declaration *decl = new ast_declaration($2, true, $4, $7);
+	   void *ctx = talloc_parent(state);
+	   ast_declaration *decl = new(ctx) ast_declaration($2, true, $4, $7);
 
-	   $$ = new ast_declarator_list($1);
+	   $$ = new(ctx) ast_declarator_list($1);
 	   $$->set_location(yylloc);
 	   $$->declarations.push_tail(&decl->link);
 	}
 	| fully_specified_type IDENTIFIER '=' initializer
 	{
-	   ast_declaration *decl = new ast_declaration($2, false, NULL, $4);
+	   void *ctx = talloc_parent(state);
+	   ast_declaration *decl = new(ctx) ast_declaration($2, false, NULL, $4);
 
-	   $$ = new ast_declarator_list($1);
+	   $$ = new(ctx) ast_declarator_list($1);
 	   $$->set_location(yylloc);
 	   $$->declarations.push_tail(&decl->link);
 	}
 	| INVARIANT IDENTIFIER // Vertex only.
 	{
-	   ast_declaration *decl = new ast_declaration($2, false, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   ast_declaration *decl = new(ctx) ast_declaration($2, false, NULL, NULL);
 
-	   $$ = new ast_declarator_list(NULL);
+	   $$ = new(ctx) ast_declarator_list(NULL);
 	   $$->set_location(yylloc);
 	   $$->invariant = true;
 
@@ -863,13 +920,15 @@ single_declaration:
 fully_specified_type:
 	type_specifier
 	{
-	   $$ = new ast_fully_specified_type();
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_fully_specified_type();
 	   $$->set_location(yylloc);
 	   $$->specifier = $1;
 	}
 	| type_qualifier type_specifier
 	{
-	   $$ = new ast_fully_specified_type();
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_fully_specified_type();
 	   $$->set_location(yylloc);
 	   $$->qualifier = $1.q;
 	   $$->specifier = $2;
@@ -939,17 +998,20 @@ type_specifier_no_prec:
 type_specifier_nonarray:
 	basic_type_specifier_nonarray
 	{
-	   $$ = new ast_type_specifier($1);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_type_specifier($1);
 	   $$->set_location(yylloc);
 	}
 	| struct_specifier
 	{
-	   $$ = new ast_type_specifier($1);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_type_specifier($1);
 	   $$->set_location(yylloc);
 	}
 	| IDENTIFIER
 	{
-	   $$ = new ast_type_specifier($1);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_type_specifier($1);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -1050,12 +1112,14 @@ precision_qualifier:
 struct_specifier:
 	STRUCT IDENTIFIER '{' struct_declaration_list '}'
 	{
-	   $$ = new ast_struct_specifier($2, $4);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_struct_specifier($2, $4);
 	   $$->set_location(yylloc);
 	}
 	| STRUCT '{' struct_declaration_list '}'
 	{
-	   $$ = new ast_struct_specifier(NULL, $3);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_struct_specifier(NULL, $3);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -1076,11 +1140,12 @@ struct_declaration_list:
 struct_declaration:
 	type_specifier struct_declarator_list ';'
 	{
-	   ast_fully_specified_type *type = new ast_fully_specified_type();
+	   void *ctx = talloc_parent(state);
+	   ast_fully_specified_type *type = new(ctx) ast_fully_specified_type();
 	   type->set_location(yylloc);
 
 	   type->specifier = $1;
-	   $$ = new ast_declarator_list(type);
+	   $$ = new(ctx) ast_declarator_list(type);
 	   $$->set_location(yylloc);
 
 	   $$->declarations.push_degenerate_list_at_head(& $2->link);
@@ -1103,12 +1168,14 @@ struct_declarator_list:
 struct_declarator:
 	IDENTIFIER
 	{
-	   $$ = new ast_declaration($1, false, NULL, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_declaration($1, false, NULL, NULL);
 	   $$->set_location(yylloc);
 	}
 	| IDENTIFIER '[' constant_expression ']'
 	{
-	   $$ = new ast_declaration($1, true, $3, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_declaration($1, true, $3, NULL);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -1150,12 +1217,14 @@ simple_statement:
 compound_statement:
 	'{' '}'
 	{
-	   $$ = new ast_compound_statement(true, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_compound_statement(true, NULL);
 	   $$->set_location(yylloc);
 	}
 	| '{' statement_list '}'
 	{
-	   $$ = new ast_compound_statement(true, $2);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_compound_statement(true, $2);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -1168,12 +1237,14 @@ statement_no_new_scope:
 compound_statement_no_new_scope:
 	'{' '}'
 	{
-	   $$ = new ast_compound_statement(false, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_compound_statement(false, NULL);
 	   $$->set_location(yylloc);
 	}
 	| '{' statement_list '}'
 	{
-	   $$ = new ast_compound_statement(false, $2);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_compound_statement(false, $2);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -1203,12 +1274,14 @@ statement_list:
 expression_statement:
 	';'
 	{
-	   $$ = new ast_expression_statement(NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_statement(NULL);
 	   $$->set_location(yylloc);
 	}
 	| expression ';'
 	{
-	   $$ = new ast_expression_statement($1);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_expression_statement($1);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -1216,7 +1289,8 @@ expression_statement:
 selection_statement_matched:
 	IF '(' expression ')' statement_matched ELSE statement_matched
 	{
-	   $$ = new ast_selection_statement($3, $5, $7);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_selection_statement($3, $5, $7);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -1224,17 +1298,20 @@ selection_statement_matched:
 selection_statement_unmatched:
 	IF '(' expression ')' statement_matched
 	{
-	   $$ = new ast_selection_statement($3, $5, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_selection_statement($3, $5, NULL);
 	   $$->set_location(yylloc);
 	}
 	| IF '(' expression ')' statement_unmatched
 	{
-	   $$ = new ast_selection_statement($3, $5, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_selection_statement($3, $5, NULL);
 	   $$->set_location(yylloc);
 	}
 	| IF '(' expression ')' statement_matched ELSE statement_unmatched
 	{
-	   $$ = new ast_selection_statement($3, $5, $7);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_selection_statement($3, $5, $7);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -1246,8 +1323,9 @@ condition:
 	}
 	| fully_specified_type IDENTIFIER '=' initializer
 	{
-	   ast_declaration *decl = new ast_declaration($2, false, NULL, $4);
-	   ast_declarator_list *declarator = new ast_declarator_list($1);
+	   void *ctx = talloc_parent(state);
+	   ast_declaration *decl = new(ctx) ast_declaration($2, false, NULL, $4);
+	   ast_declarator_list *declarator = new(ctx) ast_declarator_list($1);
 	   decl->set_location(yylloc);
 	   declarator->set_location(yylloc);
 
@@ -1268,20 +1346,23 @@ case_label:
 iteration_statement:
 	WHILE '(' condition ')' statement_no_new_scope
 	{
-	   $$ = new ast_iteration_statement(ast_iteration_statement::ast_while,
-					    NULL, $3, NULL, $5);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_iteration_statement(ast_iteration_statement::ast_while,
+	   					    NULL, $3, NULL, $5);
 	   $$->set_location(yylloc);
 	}
 	| DO statement WHILE '(' expression ')' ';'
 	{
-	   $$ = new ast_iteration_statement(ast_iteration_statement::ast_do_while,
-					    NULL, $5, NULL, $2);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_iteration_statement(ast_iteration_statement::ast_do_while,
+						    NULL, $5, NULL, $2);
 	   $$->set_location(yylloc);
 	}
 	| FOR '(' for_init_statement for_rest_statement ')' statement_no_new_scope
 	{
-	   $$ = new ast_iteration_statement(ast_iteration_statement::ast_for,
-					    $3, $4.cond, $4.rest, $6);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_iteration_statement(ast_iteration_statement::ast_for,
+						    $3, $4.cond, $4.rest, $6);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -1316,27 +1397,32 @@ for_rest_statement:
 jump_statement:
 	CONTINUE ';' 
 	{
-	   $$ = new ast_jump_statement(ast_jump_statement::ast_continue, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_continue, NULL);
 	   $$->set_location(yylloc);
 	}
 	| BREAK ';'
 	{
-	   $$ = new ast_jump_statement(ast_jump_statement::ast_break, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_break, NULL);
 	   $$->set_location(yylloc);
 	}
 	| RETURN ';'
 	{
-	   $$ = new ast_jump_statement(ast_jump_statement::ast_return, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_return, NULL);
 	   $$->set_location(yylloc);
 	}
 	| RETURN expression ';'
 	{
-	   $$ = new ast_jump_statement(ast_jump_statement::ast_return, $2);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_return, $2);
 	   $$->set_location(yylloc);
 	}
 	| DISCARD ';' // Fragment shader only.
 	{
-	   $$ = new ast_jump_statement(ast_jump_statement::ast_discard, NULL);
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_discard, NULL);
 	   $$->set_location(yylloc);
 	}
 	;
@@ -1349,7 +1435,8 @@ external_declaration:
 function_definition:
 	function_prototype compound_statement_no_new_scope
 	{
-	   $$ = new ast_function_definition();
+	   void *ctx = talloc_parent(state);
+	   $$ = new(ctx) ast_function_definition();
 	   $$->set_location(yylloc);
 	   $$->prototype = $1;
 	   $$->body = $2;