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debugging/02_day/valgrind/valgrind-3.11.0/helgrind/hg_wordset.c
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2015-12-13 22:34:58 +09:00

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/*--------------------------------------------------------------------*/
/*--- Sets of words, with unique set identifiers. ---*/
/*--- hg_wordset.c ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Helgrind, a Valgrind tool for detecting errors
in threaded programs.
Copyright (C) 2007-2015 OpenWorks LLP
info@open-works.co.uk
This program 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 2 of the
License, or (at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307, USA.
The GNU General Public License is contained in the file COPYING.
Neither the names of the U.S. Department of Energy nor the
University of California nor the names of its contributors may be
used to endorse or promote products derived from this software
without prior written permission.
*/
#include "pub_tool_basics.h"
#include "pub_tool_libcassert.h"
#include "pub_tool_libcbase.h"
#include "pub_tool_libcprint.h"
#include "pub_tool_threadstate.h"
#include "pub_tool_wordfm.h"
#include "hg_basics.h"
#include "hg_wordset.h" /* self */
// define to 1 to have (a lot of) debugging of add/re-use/die WSU entries.
#define HG_DEBUG 0
//------------------------------------------------------------------//
//--- Word Cache ---//
//------------------------------------------------------------------//
typedef
struct { UWord arg1; UWord arg2; UWord res; }
WCacheEnt;
/* Each cache is a fixed sized array of N_WCACHE_STAT_MAX entries.
However only the first .dynMax are used. This is because at some
point, expanding the cache further overall gives a slowdown because
searching more entries more than negates any performance advantage
from caching those entries in the first place. Hence use .dynMax
to allow the size of the cache(s) to be set differently for each
different WordSetU. */
#define N_WCACHE_STAT_MAX 32
typedef
struct {
WCacheEnt ent[N_WCACHE_STAT_MAX];
UWord dynMax; /* 1 .. N_WCACHE_STAT_MAX inclusive */
UWord inUse; /* 0 .. dynMax inclusive */
}
WCache;
#define WCache_INIT(_zzcache,_zzdynmax) \
do { \
tl_assert((_zzdynmax) >= 1); \
tl_assert((_zzdynmax) <= N_WCACHE_STAT_MAX); \
(_zzcache).dynMax = (_zzdynmax); \
(_zzcache).inUse = 0; \
} while (0)
#define WCache_LOOKUP_AND_RETURN(_retty,_zzcache,_zzarg1,_zzarg2) \
do { \
UWord _i; \
UWord _arg1 = (UWord)(_zzarg1); \
UWord _arg2 = (UWord)(_zzarg2); \
WCache* _cache = &(_zzcache); \
tl_assert(_cache->dynMax >= 1); \
tl_assert(_cache->dynMax <= N_WCACHE_STAT_MAX); \
tl_assert(_cache->inUse >= 0); \
tl_assert(_cache->inUse <= _cache->dynMax); \
if (_cache->inUse > 0) { \
if (_cache->ent[0].arg1 == _arg1 \
&& _cache->ent[0].arg2 == _arg2) \
return (_retty)_cache->ent[0].res; \
for (_i = 1; _i < _cache->inUse; _i++) { \
if (_cache->ent[_i].arg1 == _arg1 \
&& _cache->ent[_i].arg2 == _arg2) { \
WCacheEnt tmp = _cache->ent[_i-1]; \
_cache->ent[_i-1] = _cache->ent[_i]; \
_cache->ent[_i] = tmp; \
return (_retty)_cache->ent[_i-1].res; \
} \
} \
} \
} while (0)
#define WCache_UPDATE(_zzcache,_zzarg1,_zzarg2,_zzresult) \
do { \
Word _i; \
UWord _arg1 = (UWord)(_zzarg1); \
UWord _arg2 = (UWord)(_zzarg2); \
UWord _res = (UWord)(_zzresult); \
WCache* _cache = &(_zzcache); \
tl_assert(_cache->dynMax >= 1); \
tl_assert(_cache->dynMax <= N_WCACHE_STAT_MAX); \
tl_assert(_cache->inUse >= 0); \
tl_assert(_cache->inUse <= _cache->dynMax); \
if (_cache->inUse < _cache->dynMax) \
_cache->inUse++; \
for (_i = _cache->inUse-1; _i >= 1; _i--) \
_cache->ent[_i] = _cache->ent[_i-1]; \
_cache->ent[0].arg1 = _arg1; \
_cache->ent[0].arg2 = _arg2; \
_cache->ent[0].res = _res; \
} while (0)
//------------------------------------------------------------------//
//--- WordSet ---//
//--- Implementation ---//
//------------------------------------------------------------------//
typedef
struct {
WordSetU* owner; /* for sanity checking */
UWord* words;
UWord size; /* Really this should be SizeT */
}
WordVec;
/* ix2vec[0 .. ix2vec_used-1] are pointers to the lock sets (WordVecs)
really. vec2ix is the inverse mapping, mapping WordVec* to the
corresponding ix2vec entry number. The two mappings are mutually
redundant.
If a WordVec WV is marked as dead by HG(dieWS), WV is removed from
vec2ix. The entry of the dead WVs in ix2vec are used to maintain a
linked list of free (to be re-used) ix2vec entries. */
struct _WordSetU {
void* (*alloc)(const HChar*,SizeT);
const HChar* cc;
void (*dealloc)(void*);
WordFM* vec2ix; /* WordVec-to-WordSet mapping tree */
WordVec** ix2vec; /* WordSet-to-WordVec mapping array */
UWord ix2vec_size;
UWord ix2vec_used;
WordVec** ix2vec_free;
WordSet empty; /* cached, for speed */
/* Caches for some operations */
WCache cache_addTo;
WCache cache_delFrom;
WCache cache_intersect;
WCache cache_minus;
/* Stats */
UWord n_add;
UWord n_add_uncached;
UWord n_del;
UWord n_del_uncached;
UWord n_die;
UWord n_union;
UWord n_intersect;
UWord n_intersect_uncached;
UWord n_minus;
UWord n_minus_uncached;
UWord n_elem;
UWord n_doubleton;
UWord n_isEmpty;
UWord n_isSingleton;
UWord n_anyElementOf;
UWord n_isSubsetOf;
};
/* Create a new WordVec of the given size. */
static WordVec* new_WV_of_size ( WordSetU* wsu, UWord sz )
{
WordVec* wv;
tl_assert(sz >= 0);
wv = wsu->alloc( wsu->cc, sizeof(WordVec) );
wv->owner = wsu;
wv->words = NULL;
wv->size = sz;
if (sz > 0) {
wv->words = wsu->alloc( wsu->cc, (SizeT)sz * sizeof(UWord) );
}
return wv;
}
static void delete_WV ( WordVec* wv )
{
void (*dealloc)(void*) = wv->owner->dealloc;
if (wv->words) {
dealloc(wv->words);
}
dealloc(wv);
}
static void delete_WV_for_FM ( UWord wv ) {
delete_WV( (WordVec*)wv );
}
static Word cmp_WordVecs_for_FM ( UWord wv1W, UWord wv2W )
{
UWord i;
WordVec* wv1 = (WordVec*)wv1W;
WordVec* wv2 = (WordVec*)wv2W;
// WordVecs with smaller size are smaller.
if (wv1->size < wv2->size) {
return -1;
}
if (wv1->size > wv2->size) {
return 1;
}
// Sizes are equal => order based on content.
for (i = 0; i < wv1->size; i++) {
if (wv1->words[i] == wv2->words[i])
continue;
if (wv1->words[i] < wv2->words[i])
return -1;
if (wv1->words[i] > wv2->words[i])
return 1;
tl_assert(0);
}
return 0; /* identical */
}
static void ensure_ix2vec_space ( WordSetU* wsu )
{
UInt i, new_sz;
WordVec** new_vec;
tl_assert(wsu->ix2vec_used <= wsu->ix2vec_size);
if (wsu->ix2vec_used < wsu->ix2vec_size)
return;
new_sz = 2 * wsu->ix2vec_size;
if (new_sz == 0) new_sz = 1;
new_vec = wsu->alloc( wsu->cc, new_sz * sizeof(WordVec*) );
tl_assert(new_vec);
for (i = 0; i < wsu->ix2vec_size; i++)
new_vec[i] = wsu->ix2vec[i];
if (wsu->ix2vec)
wsu->dealloc(wsu->ix2vec);
wsu->ix2vec = new_vec;
wsu->ix2vec_size = new_sz;
}
/* True if wv is a dead entry (i.e. is in the linked list of free to be re-used
entries in ix2vec). */
static inline Bool is_dead ( WordSetU* wsu, WordVec* wv )
{
if (wv == NULL) /* last element in free linked list in ix2vec */
return True;
else
return (WordVec**)wv >= &(wsu->ix2vec[1])
&& (WordVec**)wv < &(wsu->ix2vec[wsu->ix2vec_size]);
}
/* Index into a WordSetU, doing the obvious range check. Failure of
the assertions marked XXX and YYY is an indication of passing the
wrong WordSetU* in the public API of this module.
Accessing a dead ws will assert. */
static WordVec* do_ix2vec ( WordSetU* wsu, WordSet ws )
{
WordVec* wv;
tl_assert(wsu->ix2vec_used <= wsu->ix2vec_size);
if (wsu->ix2vec_used > 0)
tl_assert(wsu->ix2vec);
/* If this assertion fails, it may mean you supplied a 'ws'
that does not come from the 'wsu' universe. */
tl_assert(ws < wsu->ix2vec_used); /* XXX */
wv = wsu->ix2vec[ws];
/* Make absolutely sure that 'ws' is a non dead member of 'wsu'. */
tl_assert(wv);
tl_assert(!is_dead(wsu,wv));
tl_assert(wv->owner == wsu); /* YYY */
return wv;
}
/* Same as do_ix2vec but returns NULL for a dead ws. */
static WordVec* do_ix2vec_with_dead ( WordSetU* wsu, WordSet ws )
{
WordVec* wv;
tl_assert(wsu->ix2vec_used <= wsu->ix2vec_size);
if (wsu->ix2vec_used > 0)
tl_assert(wsu->ix2vec);
/* If this assertion fails, it may mean you supplied a 'ws'
that does not come from the 'wsu' universe. */
tl_assert(ws < wsu->ix2vec_used); /* XXX */
wv = wsu->ix2vec[ws];
/* Make absolutely sure that 'ws' is either dead or a member of 'wsu'. */
if (is_dead(wsu,wv))
wv = NULL;
else
tl_assert(wv->owner == wsu); /* YYY */
return wv;
}
/* See if wv is contained within wsu. If so, deallocate wv and return
the index of the already-present copy. If not, add wv to both the
vec2ix and ix2vec mappings and return its index.
*/
static WordSet add_or_dealloc_WordVec( WordSetU* wsu, WordVec* wv_new )
{
Bool have;
WordVec* wv_old;
UWord/*Set*/ ix_old = -1;
/* Really WordSet, but need something that can safely be casted to
a Word* in the lookupFM. Making it WordSet (which is 32 bits)
causes failures on a 64-bit platform. */
tl_assert(wv_new->owner == wsu);
have = VG_(lookupFM)( wsu->vec2ix,
(UWord*)&wv_old, (UWord*)&ix_old,
(UWord)wv_new );
if (have) {
tl_assert(wv_old != wv_new);
tl_assert(wv_old);
tl_assert(wv_old->owner == wsu);
tl_assert(ix_old < wsu->ix2vec_used);
tl_assert(wsu->ix2vec[ix_old] == wv_old);
delete_WV( wv_new );
return (WordSet)ix_old;
} else if (wsu->ix2vec_free) {
WordSet ws;
tl_assert(is_dead(wsu,(WordVec*)wsu->ix2vec_free));
ws = wsu->ix2vec_free - &(wsu->ix2vec[0]);
tl_assert(wsu->ix2vec[ws] == NULL || is_dead(wsu,wsu->ix2vec[ws]));
wsu->ix2vec_free = (WordVec **) wsu->ix2vec[ws];
wsu->ix2vec[ws] = wv_new;
VG_(addToFM)( wsu->vec2ix, (UWord)wv_new, ws );
if (HG_DEBUG) VG_(printf)("aodW %s re-use free %d %p\n", wsu->cc, (Int)ws, wv_new );
return ws;
} else {
ensure_ix2vec_space( wsu );
tl_assert(wsu->ix2vec);
tl_assert(wsu->ix2vec_used < wsu->ix2vec_size);
wsu->ix2vec[wsu->ix2vec_used] = wv_new;
VG_(addToFM)( wsu->vec2ix, (Word)wv_new, (Word)wsu->ix2vec_used );
if (HG_DEBUG) VG_(printf)("aodW %s %d %p\n", wsu->cc, (Int)wsu->ix2vec_used, wv_new );
wsu->ix2vec_used++;
tl_assert(wsu->ix2vec_used <= wsu->ix2vec_size);
return (WordSet)(wsu->ix2vec_used - 1);
}
}
WordSetU* HG_(newWordSetU) ( void* (*alloc_nofail)( const HChar*, SizeT ),
const HChar* cc,
void (*dealloc)(void*),
Word cacheSize )
{
WordSetU* wsu;
WordVec* empty;
wsu = alloc_nofail( cc, sizeof(WordSetU) );
VG_(memset)( wsu, 0, sizeof(WordSetU) );
wsu->alloc = alloc_nofail;
wsu->cc = cc;
wsu->dealloc = dealloc;
wsu->vec2ix = VG_(newFM)( alloc_nofail, cc,
dealloc, cmp_WordVecs_for_FM );
wsu->ix2vec_used = 0;
wsu->ix2vec_size = 0;
wsu->ix2vec = NULL;
wsu->ix2vec_free = NULL;
WCache_INIT(wsu->cache_addTo, cacheSize);
WCache_INIT(wsu->cache_delFrom, cacheSize);
WCache_INIT(wsu->cache_intersect, cacheSize);
WCache_INIT(wsu->cache_minus, cacheSize);
empty = new_WV_of_size( wsu, 0 );
wsu->empty = add_or_dealloc_WordVec( wsu, empty );
return wsu;
}
void HG_(deleteWordSetU) ( WordSetU* wsu )
{
void (*dealloc)(void*) = wsu->dealloc;
tl_assert(wsu->vec2ix);
VG_(deleteFM)( wsu->vec2ix, delete_WV_for_FM, NULL/*val-finalizer*/ );
if (wsu->ix2vec)
dealloc(wsu->ix2vec);
dealloc(wsu);
}
WordSet HG_(emptyWS) ( WordSetU* wsu )
{
return wsu->empty;
}
Bool HG_(isEmptyWS) ( WordSetU* wsu, WordSet ws )
{
WordVec* wv = do_ix2vec( wsu, ws );
wsu->n_isEmpty++;
if (wv->size == 0) {
tl_assert(ws == wsu->empty);
return True;
} else {
tl_assert(ws != wsu->empty);
return False;
}
}
Bool HG_(isSingletonWS) ( WordSetU* wsu, WordSet ws, UWord w )
{
WordVec* wv;
tl_assert(wsu);
wsu->n_isSingleton++;
wv = do_ix2vec( wsu, ws );
return (Bool)(wv->size == 1 && wv->words[0] == w);
}
UWord HG_(cardinalityWS) ( WordSetU* wsu, WordSet ws )
{
WordVec* wv;
tl_assert(wsu);
wv = do_ix2vec( wsu, ws );
tl_assert(wv->size >= 0);
return wv->size;
}
UWord HG_(anyElementOfWS) ( WordSetU* wsu, WordSet ws )
{
WordVec* wv;
tl_assert(wsu);
wsu->n_anyElementOf++;
wv = do_ix2vec( wsu, ws );
tl_assert(wv->size >= 1);
return wv->words[0];
}
UWord HG_(cardinalityWSU) ( WordSetU* wsu )
{
tl_assert(wsu);
return wsu->ix2vec_used;
}
void HG_(getPayloadWS) ( /*OUT*/UWord** words, /*OUT*/UWord* nWords,
WordSetU* wsu, WordSet ws )
{
WordVec* wv;
if (HG_DEBUG) VG_(printf)("getPayloadWS %s %d\n", wsu->cc, (Int)ws);
tl_assert(wsu);
wv = do_ix2vec( wsu, ws );
tl_assert(wv->size >= 0);
*nWords = wv->size;
*words = wv->words;
}
void HG_(dieWS) ( WordSetU* wsu, WordSet ws )
{
WordVec* wv = do_ix2vec_with_dead( wsu, ws );
WordVec* wv_in_vec2ix;
UWord/*Set*/ wv_ix = -1;
if (HG_DEBUG) VG_(printf)("dieWS %s %d %p\n", wsu->cc, (Int)ws, wv);
if (ws == 0)
return; // we never die the empty set.
if (!wv)
return; // already dead. (or a bug ?).
wsu->n_die++;
wsu->ix2vec[ws] = (WordVec*) wsu->ix2vec_free;
wsu->ix2vec_free = &wsu->ix2vec[ws];
VG_(delFromFM) ( wsu->vec2ix,
(UWord*)&wv_in_vec2ix, (UWord*)&wv_ix,
(UWord)wv );
if (HG_DEBUG) VG_(printf)("dieWS wv_ix %d\n", (Int)wv_ix);
tl_assert (wv_ix);
tl_assert (wv_ix == ws);
delete_WV( wv );
wsu->cache_addTo.inUse = 0;
wsu->cache_delFrom.inUse = 0;
wsu->cache_intersect.inUse = 0;
wsu->cache_minus.inUse = 0;
}
Bool HG_(plausibleWS) ( WordSetU* wsu, WordSet ws )
{
if (wsu == NULL) return False;
if (ws < 0 || ws >= wsu->ix2vec_used)
return False;
return True;
}
Bool HG_(saneWS_SLOW) ( WordSetU* wsu, WordSet ws )
{
WordVec* wv;
UWord i;
if (wsu == NULL) return False;
if (ws < 0 || ws >= wsu->ix2vec_used)
return False;
wv = do_ix2vec( wsu, ws );
/* can never happen .. do_ix2vec will assert instead. Oh well. */
if (wv->owner != wsu) return False;
if (wv->size < 0) return False;
if (wv->size > 0) {
for (i = 0; i < wv->size-1; i++) {
if (wv->words[i] >= wv->words[i+1])
return False;
}
}
return True;
}
Bool HG_(elemWS) ( WordSetU* wsu, WordSet ws, UWord w )
{
UWord i;
WordVec* wv = do_ix2vec( wsu, ws );
wsu->n_elem++;
for (i = 0; i < wv->size; i++) {
if (wv->words[i] == w)
return True;
}
return False;
}
WordSet HG_(doubletonWS) ( WordSetU* wsu, UWord w1, UWord w2 )
{
WordVec* wv;
wsu->n_doubleton++;
if (w1 == w2) {
wv = new_WV_of_size(wsu, 1);
wv->words[0] = w1;
}
else if (w1 < w2) {
wv = new_WV_of_size(wsu, 2);
wv->words[0] = w1;
wv->words[1] = w2;
}
else {
tl_assert(w1 > w2);
wv = new_WV_of_size(wsu, 2);
wv->words[0] = w2;
wv->words[1] = w1;
}
return add_or_dealloc_WordVec( wsu, wv );
}
WordSet HG_(singletonWS) ( WordSetU* wsu, UWord w )
{
return HG_(doubletonWS)( wsu, w, w );
}
WordSet HG_(isSubsetOf) ( WordSetU* wsu, WordSet small, WordSet big )
{
wsu->n_isSubsetOf++;
return small == HG_(intersectWS)( wsu, small, big );
}
void HG_(ppWS) ( WordSetU* wsu, WordSet ws )
{
UWord i;
WordVec* wv;
tl_assert(wsu);
wv = do_ix2vec( wsu, ws );
VG_(printf)("{");
for (i = 0; i < wv->size; i++) {
VG_(printf)("%p", (void*)wv->words[i]);
if (i < wv->size-1)
VG_(printf)(",");
}
VG_(printf)("}");
}
void HG_(ppWSUstats) ( WordSetU* wsu, const HChar* name )
{
VG_(printf)(" WordSet \"%s\":\n", name);
VG_(printf)(" addTo %10lu (%lu uncached)\n",
wsu->n_add, wsu->n_add_uncached);
VG_(printf)(" delFrom %10lu (%lu uncached)\n",
wsu->n_del, wsu->n_del_uncached);
VG_(printf)(" union %10lu\n", wsu->n_union);
VG_(printf)(" intersect %10lu (%lu uncached) "
"[nb. incl isSubsetOf]\n",
wsu->n_intersect, wsu->n_intersect_uncached);
VG_(printf)(" minus %10lu (%lu uncached)\n",
wsu->n_minus, wsu->n_minus_uncached);
VG_(printf)(" elem %10lu\n", wsu->n_elem);
VG_(printf)(" doubleton %10lu\n", wsu->n_doubleton);
VG_(printf)(" isEmpty %10lu\n", wsu->n_isEmpty);
VG_(printf)(" isSingleton %10lu\n", wsu->n_isSingleton);
VG_(printf)(" anyElementOf %10lu\n", wsu->n_anyElementOf);
VG_(printf)(" isSubsetOf %10lu\n", wsu->n_isSubsetOf);
VG_(printf)(" dieWS %10lu\n", wsu->n_die);
}
WordSet HG_(addToWS) ( WordSetU* wsu, WordSet ws, UWord w )
{
UWord k, j;
WordVec* wv_new;
WordVec* wv;
WordSet result = (WordSet)(-1); /* bogus */
wsu->n_add++;
WCache_LOOKUP_AND_RETURN(WordSet, wsu->cache_addTo, ws, w);
wsu->n_add_uncached++;
/* If already present, this is a no-op. */
wv = do_ix2vec( wsu, ws );
for (k = 0; k < wv->size; k++) {
if (wv->words[k] == w) {
result = ws;
goto out;
}
}
/* Ok, not present. Build a new one ... */
wv_new = new_WV_of_size( wsu, wv->size + 1 );
k = j = 0;
for (; k < wv->size && wv->words[k] < w; k++) {
wv_new->words[j++] = wv->words[k];
}
wv_new->words[j++] = w;
for (; k < wv->size; k++) {
tl_assert(wv->words[k] > w);
wv_new->words[j++] = wv->words[k];
}
tl_assert(j == wv_new->size);
/* Find any existing copy, or add the new one. */
result = add_or_dealloc_WordVec( wsu, wv_new );
tl_assert(result != (WordSet)(-1));
out:
WCache_UPDATE(wsu->cache_addTo, ws, w, result);
return result;
}
WordSet HG_(delFromWS) ( WordSetU* wsu, WordSet ws, UWord w )
{
UWord i, j, k;
WordVec* wv_new;
WordSet result = (WordSet)(-1); /* bogus */
WordVec* wv = do_ix2vec( wsu, ws );
wsu->n_del++;
/* special case empty set */
if (wv->size == 0) {
tl_assert(ws == wsu->empty);
return ws;
}
WCache_LOOKUP_AND_RETURN(WordSet, wsu->cache_delFrom, ws, w);
wsu->n_del_uncached++;
/* If not already present, this is a no-op. */
for (i = 0; i < wv->size; i++) {
if (wv->words[i] == w)
break;
}
if (i == wv->size) {
result = ws;
goto out;
}
/* So w is present in ws, and the new set will be one element
smaller. */
tl_assert(i >= 0 && i < wv->size);
tl_assert(wv->size > 0);
wv_new = new_WV_of_size( wsu, wv->size - 1 );
j = k = 0;
for (; j < wv->size; j++) {
if (j == i)
continue;
wv_new->words[k++] = wv->words[j];
}
tl_assert(k == wv_new->size);
result = add_or_dealloc_WordVec( wsu, wv_new );
if (wv->size == 1) {
tl_assert(result == wsu->empty);
}
out:
WCache_UPDATE(wsu->cache_delFrom, ws, w, result);
return result;
}
WordSet HG_(unionWS) ( WordSetU* wsu, WordSet ws1, WordSet ws2 )
{
UWord i1, i2, k, sz;
WordVec* wv_new;
WordVec* wv1 = do_ix2vec( wsu, ws1 );
WordVec* wv2 = do_ix2vec( wsu, ws2 );
wsu->n_union++;
sz = 0;
i1 = i2 = 0;
while (1) {
if (i1 >= wv1->size || i2 >= wv2->size)
break;
sz++;
if (wv1->words[i1] < wv2->words[i2]) {
i1++;
} else
if (wv1->words[i1] > wv2->words[i2]) {
i2++;
} else {
i1++;
i2++;
}
}
tl_assert(i1 <= wv1->size);
tl_assert(i2 <= wv2->size);
tl_assert(i1 == wv1->size || i2 == wv2->size);
if (i1 == wv1->size && i2 < wv2->size) {
sz += (wv2->size - i2);
}
if (i2 == wv2->size && i1 < wv1->size) {
sz += (wv1->size - i1);
}
wv_new = new_WV_of_size( wsu, sz );
k = 0;
i1 = i2 = 0;
while (1) {
if (i1 >= wv1->size || i2 >= wv2->size)
break;
if (wv1->words[i1] < wv2->words[i2]) {
wv_new->words[k++] = wv1->words[i1];
i1++;
} else
if (wv1->words[i1] > wv2->words[i2]) {
wv_new->words[k++] = wv2->words[i2];
i2++;
} else {
wv_new->words[k++] = wv1->words[i1];
i1++;
i2++;
}
}
tl_assert(i1 <= wv1->size);
tl_assert(i2 <= wv2->size);
tl_assert(i1 == wv1->size || i2 == wv2->size);
if (i1 == wv1->size && i2 < wv2->size) {
while (i2 < wv2->size)
wv_new->words[k++] = wv2->words[i2++];
}
if (i2 == wv2->size && i1 < wv1->size) {
while (i1 < wv1->size)
wv_new->words[k++] = wv1->words[i1++];
}
tl_assert(k == sz);
return add_or_dealloc_WordVec( wsu, wv_new );
}
WordSet HG_(intersectWS) ( WordSetU* wsu, WordSet ws1, WordSet ws2 )
{
UWord i1, i2, k, sz;
WordSet ws_new = (WordSet)(-1); /* bogus */
WordVec* wv_new;
WordVec* wv1;
WordVec* wv2;
wsu->n_intersect++;
/* Deal with an obvious case fast. */
if (ws1 == ws2)
return ws1;
/* Since intersect(x,y) == intersect(y,x), convert both variants to
the same query. This reduces the number of variants the cache
has to deal with. */
if (ws1 > ws2) {
WordSet wst = ws1; ws1 = ws2; ws2 = wst;
}
WCache_LOOKUP_AND_RETURN(WordSet, wsu->cache_intersect, ws1, ws2);
wsu->n_intersect_uncached++;
wv1 = do_ix2vec( wsu, ws1 );
wv2 = do_ix2vec( wsu, ws2 );
sz = 0;
i1 = i2 = 0;
while (1) {
if (i1 >= wv1->size || i2 >= wv2->size)
break;
if (wv1->words[i1] < wv2->words[i2]) {
i1++;
} else
if (wv1->words[i1] > wv2->words[i2]) {
i2++;
} else {
sz++;
i1++;
i2++;
}
}
tl_assert(i1 <= wv1->size);
tl_assert(i2 <= wv2->size);
tl_assert(i1 == wv1->size || i2 == wv2->size);
wv_new = new_WV_of_size( wsu, sz );
k = 0;
i1 = i2 = 0;
while (1) {
if (i1 >= wv1->size || i2 >= wv2->size)
break;
if (wv1->words[i1] < wv2->words[i2]) {
i1++;
} else
if (wv1->words[i1] > wv2->words[i2]) {
i2++;
} else {
wv_new->words[k++] = wv1->words[i1];
i1++;
i2++;
}
}
tl_assert(i1 <= wv1->size);
tl_assert(i2 <= wv2->size);
tl_assert(i1 == wv1->size || i2 == wv2->size);
tl_assert(k == sz);
ws_new = add_or_dealloc_WordVec( wsu, wv_new );
if (sz == 0) {
tl_assert(ws_new == wsu->empty);
}
tl_assert(ws_new != (WordSet)(-1));
WCache_UPDATE(wsu->cache_intersect, ws1, ws2, ws_new);
return ws_new;
}
WordSet HG_(minusWS) ( WordSetU* wsu, WordSet ws1, WordSet ws2 )
{
UWord i1, i2, k, sz;
WordSet ws_new = (WordSet)(-1); /* bogus */
WordVec* wv_new;
WordVec* wv1;
WordVec* wv2;
wsu->n_minus++;
WCache_LOOKUP_AND_RETURN(WordSet, wsu->cache_minus, ws1, ws2);
wsu->n_minus_uncached++;
wv1 = do_ix2vec( wsu, ws1 );
wv2 = do_ix2vec( wsu, ws2 );
sz = 0;
i1 = i2 = 0;
while (1) {
if (i1 >= wv1->size || i2 >= wv2->size)
break;
if (wv1->words[i1] < wv2->words[i2]) {
sz++;
i1++;
} else
if (wv1->words[i1] > wv2->words[i2]) {
i2++;
} else {
i1++;
i2++;
}
}
tl_assert(i1 <= wv1->size);
tl_assert(i2 <= wv2->size);
tl_assert(i1 == wv1->size || i2 == wv2->size);
if (i2 == wv2->size && i1 < wv1->size) {
sz += (wv1->size - i1);
}
wv_new = new_WV_of_size( wsu, sz );
k = 0;
i1 = i2 = 0;
while (1) {
if (i1 >= wv1->size || i2 >= wv2->size)
break;
if (wv1->words[i1] < wv2->words[i2]) {
wv_new->words[k++] = wv1->words[i1];
i1++;
} else
if (wv1->words[i1] > wv2->words[i2]) {
i2++;
} else {
i1++;
i2++;
}
}
tl_assert(i1 <= wv1->size);
tl_assert(i2 <= wv2->size);
tl_assert(i1 == wv1->size || i2 == wv2->size);
if (i2 == wv2->size && i1 < wv1->size) {
while (i1 < wv1->size)
wv_new->words[k++] = wv1->words[i1++];
}
tl_assert(k == sz);
ws_new = add_or_dealloc_WordVec( wsu, wv_new );
if (sz == 0) {
tl_assert(ws_new == wsu->empty);
}
tl_assert(ws_new != (WordSet)(-1));
WCache_UPDATE(wsu->cache_minus, ws1, ws2, ws_new);
return ws_new;
}
static __attribute__((unused))
void show_WS ( WordSetU* wsu, WordSet ws )
{
UWord i;
WordVec* wv = do_ix2vec( wsu, ws );
VG_(printf)("#%u{", ws);
for (i = 0; i < wv->size; i++) {
VG_(printf)("%lu", wv->words[i]);
if (i < wv->size-1)
VG_(printf)(",");
}
VG_(printf)("}\n");
}
//------------------------------------------------------------------//
//--- end WordSet ---//
//--- Implementation ---//
//------------------------------------------------------------------//
/*--------------------------------------------------------------------*/
/*--- end hg_wordset.c ---*/
/*--------------------------------------------------------------------*/
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