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ir_expression_flattening: Fix breakage from hierarchichal visitor.

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Similar to other situations where the visitor pattern doesn't fit, in
this case we need the pointer to the base instruction in the
instruction stream for where to insert any new instructions we
generate (not the instruction in the tree we're looking at).  By
removing the code for setting the base_ir, flattened expressions would
end up, for example, before the function definition where they had appeared.
This commit is contained in:
Eric Anholt 2010-06-01 15:06:11 -07:00
parent e668c2a9ee
commit 459e4a286c
1 changed files with 30 additions and 0 deletions
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30
ir_expression_flattening.cpp
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@ -55,6 +55,9 @@ public:
virtual ir_visitor_status visit_enter(ir_call *);
virtual ir_visitor_status visit_enter(ir_return *);
virtual ir_visitor_status visit_enter(ir_function_signature *);
virtual ir_visitor_status visit_enter(ir_if *);
virtual ir_visitor_status visit_enter(ir_loop *);
virtual ir_visitor_status visit_leave(ir_expression *);
bool (*predicate)(ir_instruction *ir);
@ -73,6 +76,33 @@ do_expression_flattening(exec_list *instructions,
}
}
ir_visitor_status
ir_expression_flattening_visitor::visit_enter(ir_function_signature *ir)
{
do_expression_flattening(&ir->body, this->predicate);
return visit_continue_with_parent;
}
ir_visitor_status
ir_expression_flattening_visitor::visit_enter(ir_loop *ir)
{
do_expression_flattening(&ir->body_instructions, this->predicate);
return visit_continue_with_parent;
}
ir_visitor_status
ir_expression_flattening_visitor::visit_enter(ir_if *ir)
{
ir->condition->accept(this);
do_expression_flattening(&ir->then_instructions, this->predicate);
do_expression_flattening(&ir->else_instructions, this->predicate);
return visit_continue_with_parent;
}
ir_visitor_status
ir_expression_flattening_visitor::visit_leave(ir_expression *ir)
{