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/*
* Copyright © 2010 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/**
* \file ir_validate.cpp
*
* Attempts to verify that various invariants of the IR tree are true.
*
* In particular, at the moment it makes sure that no single
* ir_instruction node except for ir_variable appears multiple times
* in the ir tree. ir_variable does appear multiple times: Once as a
* declaration in an exec_list, and multiple times as the endpoint of
* a dereference chain.
*/
#include <inttypes.h>
#include "ir.h"
#include "ir_hierarchical_visitor.h"
#include "hash_table.h"
static unsigned int hash_func(const void *key)
{
return (unsigned int)(uintptr_t)key;
}
static int hash_compare_func(const void *key1, const void *key2)
{
return key1 == key2 ? 0 : 1;
}
class ir_validate : public ir_hierarchical_visitor {
public:
ir_validate()
{
this->ht = hash_table_ctor(0, hash_func, hash_compare_func);
this->callback = ir_validate::validate_ir;
this->data = ht;
}
~ir_validate()
{
hash_table_dtor(this->ht);
}
virtual ir_visitor_status visit(ir_variable *v);
static void validate_ir(ir_instruction *ir, void *data);
struct hash_table *ht;
};
ir_visitor_status
ir_validate::visit(ir_variable *ir)
{
/* An ir_variable is the one thing that can (and will) appear multiple times
* in an IR tree.
*/
(void) ir;
return visit_continue;
}
void
ir_validate::validate_ir(ir_instruction *ir, void *data)
{
struct hash_table *ht = (struct hash_table *) data;
if (hash_table_find(ht, ir)) {
printf("Instruction node present twice in ir tree:\n");
ir->print();
printf("\n");
abort();
}
hash_table_insert(ht, ir, ir);
}
void
validate_ir_tree(exec_list *instructions)
{
ir_validate v;
v.run(instructions);
}
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