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Refactor ir_dereference support for ir_hierarchical_visitor

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Move the accept method for hierarchical visitors from ir_dereference
to the derived classes.  This was mostly straight-forward, but I
suspect that ir_dead_code_local may be broken now.
This commit is contained in:
Ian Romanick
2010-05-19 12:02:19 +02:00
parent 70fe8b6663
commit f3a002b503
6 changed files with 89 additions and 49 deletions
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ir_dead_code.cpp
+16 -36
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@@ -60,14 +60,11 @@ public:
class ir_dead_code_visitor : public ir_hierarchical_visitor {
public:
virtual ir_visitor_status visit(ir_variable *);
virtual ir_visitor_status visit(ir_dereference_variable *);
virtual ir_visitor_status visit_enter(ir_function *);
virtual ir_visitor_status visit_enter(ir_dereference *);
virtual ir_visitor_status visit_leave(ir_dereference *);
virtual ir_visitor_status visit_leave(ir_assignment *);
ir_dead_code_visitor(void);
variable_entry *get_variable_entry(ir_variable *var);
bool (*predicate)(ir_instruction *ir);
@@ -75,16 +72,8 @@ public:
/* List of variable_entry */
exec_list variable_list;
/* Depth of derefernce stack. */
int in_dereference;
};
ir_dead_code_visitor::ir_dead_code_visitor(void)
{
this->in_dereference = 0;
}
variable_entry *
ir_dead_code_visitor::get_variable_entry(ir_variable *var)
@@ -106,12 +95,21 @@ ir_visitor_status
ir_dead_code_visitor::visit(ir_variable *ir)
{
variable_entry *entry = this->get_variable_entry(ir);
if (entry) {
if (this->in_dereference)
entry->referenced_count++;
else
entry->declaration = true;
}
if (entry)
entry->declaration = true;
return visit_continue;
}
ir_visitor_status
ir_dead_code_visitor::visit(ir_dereference_variable *ir)
{
ir_variable *const var = ir->variable_referenced();
variable_entry *entry = this->get_variable_entry(var);
if (entry)
entry->referenced_count++;
return visit_continue;
}
@@ -125,24 +123,6 @@ ir_dead_code_visitor::visit_enter(ir_function *ir)
}
ir_visitor_status
ir_dead_code_visitor::visit_enter(ir_dereference *ir)
{
(void) ir;
this->in_dereference++;
return visit_continue;
}
ir_visitor_status
ir_dead_code_visitor::visit_leave(ir_dereference *ir)
{
(void) ir;
this->in_dereference--;
return visit_continue;
}
ir_visitor_status
ir_dead_code_visitor::visit_leave(ir_assignment *ir)
{