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/* Iterator for walking a chain of inlining locations.
Copyright (C) 2022-2023 Free Software Foundation, Inc.
Contributed by David Malcolm <dmalcolm@redhat.com>.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_ANALYZER_INLINING_ITERATOR_H
#define GCC_ANALYZER_INLINING_ITERATOR_H
/* Iterator for walking a chain of inlining locations.
The fndecls and locations will be traversed from innermost to outermost.
For example, given:
inline void inner (void)
{
...LOCATION HERE...
}
void outer (void)
{
inner (); <-- CALLSITE
}
then the fndecl will be "inner" on the initial iteration, and "outer" on
the second (final) iteration.
Compare with lhd_print_error_function, cp_print_error_function,
and optrecord_json_writer::inlining_chain_to_json. */
class inlining_iterator
{
public:
inlining_iterator (location_t loc)
: m_abstract_origin (LOCATION_BLOCK (loc)),
m_callsite (UNKNOWN_LOCATION), m_fndecl (NULL),
m_next_abstract_origin (NULL)
{
prepare_iteration ();
}
bool done_p () const { return m_abstract_origin == NULL; }
void next ()
{
m_abstract_origin = m_next_abstract_origin;
prepare_iteration ();
}
tree get_fndecl () const { return m_fndecl; }
location_t get_callsite () const { return m_callsite; }
tree get_block () const { return m_abstract_origin; }
private:
void prepare_iteration ()
{
if (done_p ())
return;
tree block = m_abstract_origin;
m_callsite = BLOCK_SOURCE_LOCATION (block);
m_fndecl = NULL;
block = BLOCK_SUPERCONTEXT (block);
while (block && TREE_CODE (block) == BLOCK
&& BLOCK_ABSTRACT_ORIGIN (block))
{
tree ao = BLOCK_ABSTRACT_ORIGIN (block);
if (TREE_CODE (ao) == FUNCTION_DECL)
{
m_fndecl = ao;
break;
}
else if (TREE_CODE (ao) != BLOCK)
break;
block = BLOCK_SUPERCONTEXT (block);
}
if (m_fndecl)
m_next_abstract_origin = block;
else
{
while (block && TREE_CODE (block) == BLOCK)
block = BLOCK_SUPERCONTEXT (block);
if (block && TREE_CODE (block) == FUNCTION_DECL)
m_fndecl = block;
m_next_abstract_origin = NULL;
}
}
tree m_abstract_origin;
location_t m_callsite;
tree m_fndecl;
tree m_next_abstract_origin;
};
#endif /* GCC_ANALYZER_INLINING_ITERATOR_H */
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