Use ir_variable::clone to copy parameters to the function body

Several other code movements were also done.  This partitions this
function into two halves.  The first half processes the prototype
part, and the second have processes the actual function definition.
The coming patch series will parition ast_function_definition::hir
into (at least) two separate functions.

1 files changed, 9 insertions, 12 deletions

diff --git a/ast_to_hir.cpp b/ast_to_hir.cpp
index 627d932182..6d78383a46 100644
--- a/ast_to_hir.cpp
+++ b/ast_to_hir.cpp
@@ -1544,32 +1544,29 @@ ast_function_definition::hir(exec_list *instructions,
       }
    }
 
+   parameters.move_nodes_to(& signature->parameters);
+
 
    assert(state->current_function == NULL);
    state->current_function = signature;
 
-   ast_function_parameters_to_hir(& this->prototype->parameters,
-				  & signature->parameters,
-				  state);
-
    label = new ir_label(name);
    if (signature->definition == NULL) {
       signature->definition = label;
    }
    instructions->push_tail(label);
 
-   /* Add the function parameters to the symbol table.  During this step the
-    * parameter declarations are also moved from the temporary "parameters" list
-    * to the instruction list.  There are other more efficient ways to do this,
-    * but they involve ugly linked-list gymnastics.
+   /* Duplicate parameters declared in the prototype as concrete variables.
+    * Add these to the symbol table.
     */
    state->symbols->push_scope();
-   foreach_iter(exec_list_iterator, iter, parameters) {
-      ir_variable *const var = ((ir_instruction *) iter.get())->as_variable();
+   foreach_iter(exec_list_iterator, iter, signature->parameters) {
+      ir_variable *const proto = ((ir_instruction *) iter.get())->as_variable();
+
+      assert(proto != NULL);
 
-      assert(var != NULL);
+      ir_variable *const var = proto->clone();
 
-      iter.remove();
       instructions->push_tail(var);
 
       /* The only way a parameter would "exist" is if two parameters have