Begin refactoring ir_dereference

Create separate subclasses of ir_dereference for variable, array, and
record dereferences.  As a side effect, array and record dereferences
no longer point to ir_variable objects directly.  Instead they each
point to an ir_dereference_variable object.

This is the first of several steps in the refactoring process.  The
intention is that ir_dereference will eventually become an abstract
base class.

1 files changed, 2 insertions, 2 deletions

diff --git a/ir_expression_flattening.cpp b/ir_expression_flattening.cpp
index 28c96a787d..9494786d4e 100644
--- a/ir_expression_flattening.cpp
+++ b/ir_expression_flattening.cpp
@@ -143,12 +143,12 @@ ir_expression_flattening_visitor::visit(ir_expression *ir)
 	 var = new ir_variable(ir->operands[operand]->type, "flattening_tmp");
 	 this->base_ir->insert_before(var);
 
-	 assign = new ir_assignment(new ir_dereference(var),
+	 assign = new ir_assignment(new ir_dereference_variable(var),
 				    ir->operands[operand],
 				    NULL);
 	 this->base_ir->insert_before(assign);
 
-	 ir->operands[operand] = new ir_dereference(var);
+	 ir->operands[operand] = new ir_dereference_variable(var);
       }
    }
 }