154 lines
3.8 KiB
C++
154 lines
3.8 KiB
C++
/* A state machine for use in DejaGnu tests, to check that
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pattern-matching works as expected.
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Copyright (C) 2019-2021 Free Software Foundation, Inc.
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Contributed by David Malcolm <dmalcolm@redhat.com>.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tree.h"
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#include "function.h"
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#include "basic-block.h"
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#include "gimple.h"
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#include "tree-pretty-print.h"
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#include "diagnostic-path.h"
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#include "diagnostic-metadata.h"
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#include "function.h"
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#include "json.h"
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#include "analyzer/analyzer.h"
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#include "diagnostic-event-id.h"
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#include "analyzer/analyzer-logging.h"
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#include "analyzer/sm.h"
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#include "analyzer/pending-diagnostic.h"
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#if ENABLE_ANALYZER
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namespace ana {
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namespace {
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/* A state machine for use in DejaGnu tests, to check that
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pattern-matching works as expected. */
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class pattern_test_state_machine : public state_machine
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{
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public:
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pattern_test_state_machine (logger *logger);
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bool inherited_state_p () const FINAL OVERRIDE { return false; }
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bool on_stmt (sm_context *sm_ctxt,
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const supernode *node,
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const gimple *stmt) const FINAL OVERRIDE;
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void on_condition (sm_context *sm_ctxt,
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const supernode *node,
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const gimple *stmt,
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tree lhs,
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enum tree_code op,
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tree rhs) const FINAL OVERRIDE;
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bool can_purge_p (state_t s) const FINAL OVERRIDE;
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};
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class pattern_match : public pending_diagnostic_subclass<pattern_match>
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{
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public:
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pattern_match (tree lhs, enum tree_code op, tree rhs)
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: m_lhs (lhs), m_op (op), m_rhs (rhs) {}
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const char *get_kind () const FINAL OVERRIDE { return "pattern_match"; }
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bool operator== (const pattern_match &other) const
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{
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return (same_tree_p (m_lhs, other.m_lhs)
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&& m_op == other.m_op
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&& same_tree_p (m_rhs, other.m_rhs));
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}
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bool emit (rich_location *rich_loc) FINAL OVERRIDE
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{
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return warning_at (rich_loc, 0, "pattern match on %<%E %s %E%>",
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m_lhs, op_symbol_code (m_op), m_rhs);
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}
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private:
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tree m_lhs;
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enum tree_code m_op;
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tree m_rhs;
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};
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pattern_test_state_machine::pattern_test_state_machine (logger *logger)
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: state_machine ("pattern-test", logger)
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{
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}
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bool
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pattern_test_state_machine::on_stmt (sm_context *sm_ctxt ATTRIBUTE_UNUSED,
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const supernode *node ATTRIBUTE_UNUSED,
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const gimple *stmt ATTRIBUTE_UNUSED) const
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{
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return false;
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}
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/* Implementation of state_machine::on_condition vfunc for
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pattern_test_state_machine.
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Queue a pattern_match diagnostic for any comparison against a
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constant. */
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void
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pattern_test_state_machine::on_condition (sm_context *sm_ctxt,
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const supernode *node,
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const gimple *stmt,
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tree lhs,
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enum tree_code op,
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tree rhs) const
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{
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if (stmt == NULL)
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return;
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if (!CONSTANT_CLASS_P (rhs))
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return;
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pending_diagnostic *diag = new pattern_match (lhs, op, rhs);
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sm_ctxt->warn (node, stmt, lhs, diag);
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}
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bool
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pattern_test_state_machine::can_purge_p (state_t s ATTRIBUTE_UNUSED) const
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{
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return true;
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}
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} // anonymous namespace
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/* Internal interface to this file. */
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state_machine *
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make_pattern_test_state_machine (logger *logger)
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{
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return new pattern_test_state_machine (logger);
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}
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} // namespace ana
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#endif /* #if ENABLE_ANALYZER */
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