LCOV - code coverage report
Current view: top level - gcc - value-range-storage.cc (source / functions) Coverage Total Hit
Test: gcc.info Lines: 88.1 % 446 393
Test Date: 2026-09-19 16:22:48 Functions: 84.0 % 50 42
Legend: Lines:     hit not hit

            Line data    Source code
       1              : /* Support routines for vrange storage.
       2              :    Copyright (C) 2022-2026 Free Software Foundation, Inc.
       3              :    Contributed by Aldy Hernandez <aldyh@redhat.com>.
       4              : 
       5              : This file is part of GCC.
       6              : 
       7              : GCC is free software; you can redistribute it and/or modify
       8              : it under the terms of the GNU General Public License as published by
       9              : the Free Software Foundation; either version 3, or (at your option)
      10              : any later version.
      11              : 
      12              : GCC is distributed in the hope that it will be useful,
      13              : but WITHOUT ANY WARRANTY; without even the implied warranty of
      14              : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      15              : GNU General Public License for more details.
      16              : 
      17              : You should have received a copy of the GNU General Public License
      18              : along with GCC; see the file COPYING3.  If not see
      19              : <http://www.gnu.org/licenses/>.  */
      20              : 
      21              : #include "config.h"
      22              : #include "system.h"
      23              : #include "coretypes.h"
      24              : #include "backend.h"
      25              : #include "tree.h"
      26              : #include "gimple.h"
      27              : #include "gimplify.h"
      28              : #include "ssa.h"
      29              : #include "fold-const.h"
      30              : #include "gimple-range.h"
      31              : #include "value-range-storage.h"
      32              : 
      33              : // Generic memory allocator to share one interface between GC and
      34              : // obstack allocators.
      35              : 
      36              : class vrange_internal_alloc
      37              : {
      38              : public:
      39     98111012 :   vrange_internal_alloc () { }
      40     98111000 :   virtual ~vrange_internal_alloc () { }
      41              :   virtual void *alloc (size_t size) = 0;
      42              :   virtual void free (void *) = 0;
      43              : private:
      44              :   DISABLE_COPY_AND_ASSIGN (vrange_internal_alloc);
      45              : };
      46              : 
      47              : class vrange_obstack_alloc final: public vrange_internal_alloc
      48              : {
      49              : public:
      50     97817595 :   vrange_obstack_alloc ()
      51     97817595 :   {
      52     97817595 :     obstack_init (&m_obstack);
      53     97817595 :   }
      54     97817583 :   virtual ~vrange_obstack_alloc () final override
      55     97817583 :   {
      56     97817583 :     obstack_free (&m_obstack, NULL);
      57     97817583 :   }
      58    408104517 :   virtual void *alloc (size_t size) final override
      59              :   {
      60    408104517 :     return obstack_alloc (&m_obstack, size);
      61              :   }
      62            0 :   virtual void free (void *) final override { }
      63              : private:
      64              :   obstack m_obstack;
      65              : };
      66              : 
      67              : class vrange_ggc_alloc final: public vrange_internal_alloc
      68              : {
      69              : public:
      70       293417 :   vrange_ggc_alloc () { }
      71       293417 :   virtual ~vrange_ggc_alloc () final override { }
      72     20789801 :   virtual void *alloc (size_t size) final override
      73              :   {
      74     20789801 :     return ggc_internal_alloc (size);
      75              :   }
      76            0 :   virtual void free (void *p) final override
      77              :   {
      78            0 :     return ggc_free (p);
      79              :   }
      80              : };
      81              : 
      82     98111012 : vrange_allocator::vrange_allocator (bool gc)
      83              : {
      84     98111012 :   if (gc)
      85       293417 :     m_alloc = new vrange_ggc_alloc;
      86              :   else
      87     97817595 :     m_alloc = new vrange_obstack_alloc;
      88     98111012 : }
      89              : 
      90     98111000 : vrange_allocator::~vrange_allocator ()
      91              : {
      92     98111000 :   delete m_alloc;
      93     98111000 : }
      94              : 
      95              : void *
      96     58037345 : vrange_allocator::alloc (size_t size)
      97              : {
      98     58037345 :   return m_alloc->alloc (size);
      99              : }
     100              : 
     101              : void
     102            0 : vrange_allocator::free (void *p)
     103              : {
     104            0 :   m_alloc->free (p);
     105            0 : }
     106              : 
     107              : // Allocate a new vrange_storage object initialized to R and return
     108              : // it.
     109              : 
     110              : vrange_storage *
     111    312829295 : vrange_allocator::clone (const vrange &r, bool shared_p)
     112              : {
     113    312829295 :   return vrange_storage::alloc (*m_alloc, r, shared_p);
     114              : }
     115              : 
     116              : vrange_storage *
     117     29066446 : vrange_allocator::clone_varying (tree type)
     118              : {
     119     29066446 :   if (irange::supports_p (type))
     120     18586923 :     return irange_storage::alloc (*m_alloc, int_range <1> (type));
     121     10479523 :   if (prange::supports_p (type))
     122     10000732 :     return prange_storage::alloc (*m_alloc, prange (type));
     123       478791 :   if (frange::supports_p (type))
     124       478791 :     return frange_storage::alloc (*m_alloc, frange (type));
     125              :   return NULL;
     126              : }
     127              : 
     128              : vrange_storage *
     129     28961232 : vrange_allocator::clone_undefined (tree type)
     130              : {
     131     28961232 :   if (irange::supports_p (type))
     132     18487398 :     return irange_storage::alloc (*m_alloc, int_range<1> ());
     133     10473834 :   if (prange::supports_p (type))
     134      9999215 :     return prange_storage::alloc (*m_alloc, prange ());
     135       474619 :   if (frange::supports_p (type))
     136       474619 :     return frange_storage::alloc  (*m_alloc, frange ());
     137              :   return NULL;
     138              : }
     139              : 
     140              : // Allocate a new vrange_storage object initialized to R and return
     141              : // it.  Return NULL if R is unsupported.
     142              : 
     143              : vrange_storage *
     144    312829295 : vrange_storage::alloc (vrange_internal_alloc &allocator, const vrange &r,
     145              :                        bool shared_p)
     146              : {
     147    312829295 :   if (is_a <irange> (r))
     148    220563621 :     return irange_storage::alloc (allocator, as_a <irange> (r));
     149     92265674 :   if (is_a <prange> (r))
     150     80401858 :     return prange_storage::alloc (allocator, as_a <prange> (r), shared_p);
     151     11863816 :   if (is_a <frange> (r))
     152     11863816 :     return frange_storage::alloc (allocator, as_a <frange> (r));
     153              :   return NULL;
     154              : }
     155              : 
     156              : // Set storage to R.
     157              : 
     158              : void
     159     26625033 : vrange_storage::set_vrange (const vrange &r)
     160              : {
     161     26625033 :   if (is_a <irange> (r))
     162              :     {
     163     22538610 :       irange_storage *s = static_cast <irange_storage *> (this);
     164     22538610 :       gcc_checking_assert (s->fits_p (as_a <irange> (r)));
     165     22538610 :       s->set_irange (as_a <irange> (r));
     166              :     }
     167      4086423 :   else if (is_a <prange> (r))
     168              :     {
     169      3504557 :       prange_storage *s = static_cast <prange_storage *> (this);
     170      3504557 :       gcc_checking_assert (s->fits_p (as_a <prange> (r)));
     171      3504557 :       s->set_prange (as_a <prange> (r));
     172              :     }
     173       581866 :   else if (is_a <frange> (r))
     174              :     {
     175       581866 :       frange_storage *s = static_cast <frange_storage *> (this);
     176       581866 :       gcc_checking_assert (s->fits_p (as_a <frange> (r)));
     177       581866 :       s->set_frange (as_a <frange> (r));
     178              :     }
     179              :   else
     180            0 :     gcc_unreachable ();
     181              : 
     182              :   // Verify that reading back from the cache didn't drop bits.
     183     26625033 :   if (flag_checking
     184              :       // FIXME: Avoid checking frange, as it currently pessimizes some ranges:
     185              :       //
     186              :       // gfortran.dg/pr49472.f90 pessimizes [0.0, 1.0] into [-0.0, 1.0].
     187     26624967 :       && !is_a <frange> (r)
     188     52668134 :       && !r.undefined_p ())
     189              :     {
     190     25893614 :       value_range tmp (r);
     191     25893614 :       get_vrange (tmp, r.type ());
     192     25893614 :       gcc_checking_assert (tmp == r);
     193     25893614 :     }
     194     26625033 : }
     195              : 
     196              : // Restore R from storage.
     197              : 
     198              : void
     199   1782457672 : vrange_storage::get_vrange (vrange &r, tree type) const
     200              : {
     201   1782457672 :   if (is_a <irange> (r))
     202              :     {
     203   1373336498 :       const irange_storage *s = static_cast <const irange_storage *> (this);
     204   1373336498 :       s->get_irange (as_a <irange> (r), type);
     205              :     }
     206    409121174 :   else if (is_a <prange> (r))
     207              :     {
     208    363735011 :       const prange_storage *s = static_cast <const prange_storage *> (this);
     209    363735011 :       s->get_prange (as_a <prange> (r), type);
     210              :     }
     211     45386163 :   else if (is_a <frange> (r))
     212              :     {
     213     45386163 :       const frange_storage *s = static_cast <const frange_storage *> (this);
     214     45386163 :       s->get_frange (as_a <frange> (r), type);
     215              :     }
     216              :   else
     217            0 :     gcc_unreachable ();
     218   1782457672 : }
     219              : 
     220              : // Return TRUE if storage can fit R.
     221              : 
     222              : bool
     223     30859052 : vrange_storage::fits_p (const vrange &r) const
     224              : {
     225     30859052 :   if (is_a <irange> (r))
     226              :     {
     227     26700416 :       const irange_storage *s = static_cast <const irange_storage *> (this);
     228     26700416 :       return s->fits_p (as_a <irange> (r));
     229              :     }
     230      4158636 :   if (is_a <prange> (r))
     231              :     {
     232      3528378 :       const prange_storage *s = static_cast <const prange_storage *> (this);
     233      3528378 :       return s->fits_p (as_a <prange> (r));
     234              :     }
     235       630258 :   if (is_a <frange> (r))
     236              :     {
     237       630258 :       const frange_storage *s = static_cast <const frange_storage *> (this);
     238       630258 :       return s->fits_p (as_a <frange> (r));
     239              :     }
     240            0 :   gcc_unreachable ();
     241              :   return false;
     242              : }
     243              : 
     244              : // Return TRUE if the range in storage is equal to R.  It is the
     245              : // caller's responsibility to verify that the type of the range in
     246              : // storage matches that of R.
     247              : 
     248              : bool
     249     18663185 : vrange_storage::equal_p (const vrange &r) const
     250              : {
     251     18663185 :   if (is_a <irange> (r))
     252              :     {
     253      3799820 :       const irange_storage *s = static_cast <const irange_storage *> (this);
     254      3799820 :       return s->equal_p (as_a <irange> (r));
     255              :     }
     256     14863365 :   if (is_a <prange> (r))
     257              :     {
     258     14843018 :       const prange_storage *s = static_cast <const prange_storage *> (this);
     259     14843018 :       return s->equal_p (as_a <prange> (r));
     260              :     }
     261        20347 :   if (is_a <frange> (r))
     262              :     {
     263        20347 :       const frange_storage *s = static_cast <const frange_storage *> (this);
     264        20347 :       return s->equal_p (as_a <frange> (r));
     265              :     }
     266            0 :   gcc_unreachable ();
     267              : }
     268              : 
     269              : //============================================================================
     270              : // irange_storage implementation
     271              : //============================================================================
     272              : 
     273              : unsigned short *
     274   1106469597 : irange_storage::write_lengths_address ()
     275              : {
     276   1106469597 :   return (unsigned short *)&m_val[(m_num_ranges * 2 + 2)
     277   1106469597 :                                   * WIDE_INT_MAX_HWIS (m_precision)];
     278              : }
     279              : 
     280              : const unsigned short *
     281    960741680 : irange_storage::lengths_address () const
     282              : {
     283    960741680 :   return const_cast <irange_storage *> (this)->write_lengths_address ();
     284              : }
     285              : 
     286              : // Allocate a new irange_storage object initialized to R.
     287              : 
     288              : irange_storage *
     289    257637942 : irange_storage::alloc (vrange_internal_alloc &allocator, const irange &r)
     290              : {
     291    257637942 :   size_t size = irange_storage::size (r);
     292    257637942 :   irange_storage *p = static_cast <irange_storage *> (allocator.alloc (size));
     293    257637942 :   new (p) irange_storage (r);
     294    257637942 :   return p;
     295              : }
     296              : 
     297              : // Initialize the storage with R.
     298              : 
     299    257637942 : irange_storage::irange_storage (const irange &r)
     300    257637942 :   : vrange_storage (VR_IRANGE), m_max_ranges (r.num_pairs ())
     301              : {
     302    257637942 :   m_num_ranges = m_max_ranges;
     303    257637942 :   set_irange (r);
     304    257637942 : }
     305              : 
     306              : static inline void
     307    696193216 : write_wide_int (HOST_WIDE_INT *&val, unsigned short *&len, const wide_int &w)
     308              : {
     309    696193216 :   *len = w.get_len ();
     310   1393660922 :   for (unsigned i = 0; i < *len; ++i)
     311    697467706 :     *val++ = w.elt (i);
     312    696193216 :   ++len;
     313    696193216 : }
     314              : 
     315              : // Store R into the current storage.
     316              : 
     317              : void
     318    280176552 : irange_storage::set_irange (const irange &r)
     319              : {
     320    280176552 :   gcc_checking_assert (fits_p (r));
     321              : 
     322    280176552 :   if (r.undefined_p ())
     323              :     {
     324     18913987 :       m_kind = VR_UNDEFINED;
     325    134448635 :       return;
     326              :     }
     327    261262565 :   if (r.varying_p ())
     328              :     {
     329    115534648 :       m_kind = VR_VARYING;
     330    115534648 :       return;
     331              :     }
     332              : 
     333    145727917 :   m_precision = TYPE_PRECISION (r.type ());
     334    145727917 :   m_num_ranges = r.num_pairs ();
     335    145727917 :   m_kind = VR_RANGE;
     336              : 
     337    145727917 :   HOST_WIDE_INT *val = &m_val[0];
     338    145727917 :   unsigned short *len = write_lengths_address ();
     339              : 
     340    348096608 :   for (unsigned i = 0; i < r.num_pairs (); ++i)
     341              :     {
     342    202368691 :       write_wide_int (val, len, r.lower_bound (i));
     343    202371470 :       write_wide_int (val, len, r.upper_bound (i));
     344              :     }
     345              : 
     346              :   // TODO: We could avoid streaming out the value if the mask is -1.
     347    145727917 :   irange_bitmask bm = r.m_bitmask;
     348    145727917 :   write_wide_int (val, len, bm.value ());
     349    145727917 :   write_wide_int (val, len, bm.mask ());
     350    145727917 : }
     351              : 
     352              : static inline void
     353   4657385270 : read_wide_int (wide_int &w,
     354              :                const HOST_WIDE_INT *val, unsigned short len, unsigned prec)
     355              : {
     356   4657385270 :   trailing_wide_int_storage stow (prec, &len,
     357   1150723720 :                                   const_cast <HOST_WIDE_INT *> (val));
     358   3506661550 :   w = trailing_wide_int (stow);
     359              : }
     360              : 
     361              : // Restore a range of TYPE from storage into R.
     362              : 
     363              : void
     364   1376679258 : irange_storage::get_irange (irange &r, tree type) const
     365              : {
     366   1376679258 :   if (m_kind == VR_UNDEFINED)
     367              :     {
     368      9892457 :       r.set_undefined ();
     369    425830035 :       return;
     370              :     }
     371   1366786801 :   if (m_kind == VR_VARYING)
     372              :     {
     373    406045121 :       r.set_varying (type);
     374    406045121 :       return;
     375              :     }
     376              : 
     377    960741680 :   gcc_checking_assert (TYPE_PRECISION (type) == m_precision);
     378    960741680 :   const HOST_WIDE_INT *val = &m_val[0];
     379    960741680 :   const unsigned short *len = lengths_address ();
     380              : 
     381              :   // Handle the common case where R can fit the new range.
     382    960741680 :   if (r.m_max_ranges >= m_num_ranges)
     383              :     {
     384    927979504 :       r.m_kind = VR_RANGE;
     385    927979504 :       r.m_num_ranges = m_num_ranges;
     386    927979504 :       r.m_type = type;
     387   3283917334 :       for (unsigned i = 0; i < m_num_ranges * 2; ++i)
     388              :         {
     389   2355937830 :           read_wide_int (r.m_base[i], val, *len, m_precision);
     390   2355937830 :           val += *len++;
     391              :         }
     392              :     }
     393              :   // Otherwise build the range piecewise.
     394              :   else
     395              :     {
     396     32762176 :       r.set_undefined ();
     397    255506392 :       for (unsigned i = 0; i < m_num_ranges; ++i)
     398              :         {
     399    189982040 :           wide_int lb, ub;
     400    189982040 :           read_wide_int (lb, val, *len, m_precision);
     401    189982040 :           val += *len++;
     402    189982040 :           read_wide_int (ub, val, *len, m_precision);
     403    189982040 :           val += *len++;
     404    189982040 :           int_range<1> tmp (type, lb, ub);
     405    189982040 :           r.union_ (tmp);
     406    190572732 :         }
     407              :     }
     408              : 
     409    960741680 :   wide_int bits_value, bits_mask;
     410    960741680 :   read_wide_int (bits_value, val, *len, m_precision);
     411    960741680 :   val += *len++;
     412    960741680 :   read_wide_int (bits_mask, val, *len, m_precision);
     413    960741680 :   r.m_bitmask = irange_bitmask (bits_value, bits_mask);
     414    960741680 :   if (r.m_kind == VR_VARYING)
     415            0 :     r.m_kind = VR_RANGE;
     416              : 
     417    960741680 :   if (flag_checking)
     418    960738278 :     r.verify_range ();
     419    960814703 : }
     420              : 
     421              : bool
     422      3799820 : irange_storage::equal_p (const irange &r) const
     423              : {
     424      3799820 :   if (m_kind == VR_UNDEFINED || r.undefined_p ())
     425            0 :     return m_kind == r.m_kind;
     426      3799820 :   if (m_kind == VR_VARYING || r.varying_p ())
     427       457060 :     return m_kind == r.m_kind;
     428              : 
     429              :   // ?? We could make this faster by doing the comparison in place,
     430              :   // without going through get_irange.
     431      3342760 :   int_range_max tmp;
     432      3342760 :   get_irange (tmp, r.type ());
     433      3342760 :   return tmp == r;
     434      3342760 : }
     435              : 
     436              : // Return the size in bytes to allocate storage that can hold R.
     437              : 
     438              : size_t
     439    257637942 : irange_storage::size (const irange &r)
     440              : {
     441    257637942 :   if (r.undefined_p ())
     442              :     return sizeof (irange_storage);
     443              : 
     444    238865260 :   unsigned prec = TYPE_PRECISION (r.type ());
     445    238865260 :   unsigned n = r.num_pairs () * 2 + 2;
     446    238865260 :   unsigned hwi_size = ((n * WIDE_INT_MAX_HWIS (prec) - 1)
     447              :                        * sizeof (HOST_WIDE_INT));
     448    238865260 :   unsigned len_size = n * sizeof (unsigned short);
     449    238865260 :   return sizeof (irange_storage) + hwi_size + len_size;
     450              : }
     451              : 
     452              : // Return TRUE if R fits in the current storage.
     453              : 
     454              : bool
     455    329415578 : irange_storage::fits_p (const irange &r) const
     456              : {
     457    329415578 :   return m_max_ranges >= r.num_pairs ();
     458              : }
     459              : 
     460              : void
     461            0 : irange_storage::dump () const
     462              : {
     463            0 :   fprintf (stderr, "irange_storage (prec=%d, ranges=%d):\n",
     464            0 :            m_precision, m_num_ranges);
     465              : 
     466            0 :   if (m_num_ranges == 0)
     467              :     return;
     468              : 
     469            0 :   const HOST_WIDE_INT *val = &m_val[0];
     470            0 :   const unsigned short *len = lengths_address ();
     471            0 :   int i, j;
     472              : 
     473            0 :   fprintf (stderr, "  lengths = [ ");
     474            0 :   for (i = 0; i < m_num_ranges * 2 + 2; ++i)
     475            0 :     fprintf (stderr, "%d ", len[i]);
     476            0 :   fprintf (stderr, "]\n");
     477              : 
     478            0 :   for (i = 0; i < m_num_ranges; ++i)
     479              :     {
     480            0 :       for (j = 0; j < *len; ++j)
     481            0 :         fprintf (stderr, "  [PAIR %d] LB " HOST_WIDE_INT_PRINT_DEC "\n", i,
     482            0 :                  *val++);
     483            0 :       ++len;
     484            0 :       for (j = 0; j < *len; ++j)
     485            0 :         fprintf (stderr, "  [PAIR %d] UB " HOST_WIDE_INT_PRINT_DEC "\n", i,
     486            0 :                  *val++);
     487            0 :       ++len;
     488              :     }
     489              : 
     490              :   // Dump value/mask pair.
     491            0 :   for (j = 0; j < *len; ++j)
     492            0 :     fprintf (stderr, "  [VALUE] " HOST_WIDE_INT_PRINT_DEC "\n", *val++);
     493            0 :   ++len;
     494            0 :   for (j = 0; j < *len; ++j)
     495            0 :     fprintf (stderr, "  [MASK] " HOST_WIDE_INT_PRINT_DEC "\n", *val++);
     496              : }
     497              : 
     498              : DEBUG_FUNCTION void
     499            0 : debug (const irange_storage &storage)
     500              : {
     501            0 :   storage.dump ();
     502            0 :   fprintf (stderr, "\n");
     503            0 : }
     504              : 
     505              : //============================================================================
     506              : // frange_storage implementation
     507              : //============================================================================
     508              : 
     509              : // Return the number of bytes to allocate for an frange_storage holding R.
     510              : 
     511              : size_t
     512     12817226 : frange_storage::size (const frange &r)
     513              : {
     514     12817226 :   return sizeof (frange_storage) + (r.num_pairs () - 1) * sizeof (frange_pair);
     515              : }
     516              : 
     517              : // Allocate a new frange_storage object initialized to R.
     518              : 
     519              : frange_storage *
     520     12817226 : frange_storage::alloc (vrange_internal_alloc &allocator, const frange &r)
     521              : {
     522     12817226 :   frange_storage *p
     523     12817226 :     = static_cast <frange_storage *> (allocator.alloc (size (r)));
     524     12817226 :   new (p) frange_storage (r);
     525     12817226 :   return p;
     526              : }
     527              : 
     528     12817226 : frange_storage::frange_storage (const frange &r)
     529     12817226 :   : vrange_storage (VR_FRANGE), m_max_ranges (r.num_pairs ())
     530              : {
     531     12817226 :   set_frange (r);
     532     12817226 : }
     533              : 
     534              : void
     535     13399092 : frange_storage::set_frange (const frange &r)
     536              : {
     537     13399092 :   gcc_checking_assert (fits_p (r));
     538              : 
     539     13399092 :   m_kind = r.m_kind;
     540     13399092 :   m_num_ranges = r.m_num_ranges;
     541     27285507 :   for (unsigned i = 0; i < r.m_num_ranges; ++i)
     542     13886415 :     m_pairs[i] = r.m_pairs[i];
     543     13399092 :   m_pos_nan = r.m_pos_nan;
     544     13399092 :   m_neg_nan = r.m_neg_nan;
     545     13399092 : }
     546              : 
     547              : void
     548     45406510 : frange_storage::get_frange (frange &r, tree type) const
     549              : {
     550     45406510 :   gcc_checking_assert (r.supports_type_p (type));
     551              : 
     552              :   // Handle explicit NANs.
     553     45406510 :   if (m_kind == VR_NAN)
     554              :     {
     555       112079 :       if (HONOR_NANS (type))
     556              :         {
     557       112079 :           if (m_pos_nan && m_neg_nan)
     558       106626 :             r.set_nan (type);
     559              :           else
     560         5453 :             r.set_nan (type, m_neg_nan);
     561              :         }
     562              :       else
     563            0 :         r.set_undefined ();
     564              :       return;
     565              :     }
     566     45294431 :   if (m_kind == VR_UNDEFINED)
     567              :     {
     568        60843 :       r.set_undefined ();
     569        60843 :       return;
     570              :     }
     571     45233588 :   if (m_kind == VR_VARYING)
     572              :     {
     573     31352965 :       r.set_varying (type);
     574     31352965 :       return;
     575              :     }
     576              : 
     577              :   // Rebuild piecewise, like irange_storage::get_irange().
     578     13880623 :   r.set_undefined ();
     579     43250706 :   for (unsigned i = 0; i < m_num_ranges; ++i)
     580              :     {
     581     15489460 :       frange tmp (type, m_pairs[i].min, m_pairs[i].max, m_kind);
     582     15489460 :       r.union_ (tmp);
     583     15489460 :     }
     584              : 
     585              :   // The constructor will set the NAN bits for HONOR_NANS, but we must
     586              :   // make sure to set the NAN sign if known.
     587     13880623 :   if (HONOR_NANS (type) && (m_pos_nan ^ m_neg_nan) == 1)
     588      1359509 :     r.update_nan (m_neg_nan);
     589     12521114 :   else if (!m_pos_nan && !m_neg_nan)
     590     10077440 :     r.clear_nan ();
     591              : }
     592              : 
     593              : bool
     594        20347 : frange_storage::equal_p (const frange &r) const
     595              : {
     596        20347 :   if (r.undefined_p ())
     597            0 :     return m_kind == VR_UNDEFINED;
     598              : 
     599        20347 :   frange tmp;
     600        20347 :   get_frange (tmp, r.type ());
     601        20347 :   return tmp == r;
     602        20347 : }
     603              : 
     604              : bool
     605     14611216 : frange_storage::fits_p (const frange &r) const
     606              : {
     607     14611216 :   return m_max_ranges >= r.num_pairs ();
     608              : }
     609              : 
     610              : //============================================================================
     611              : // prange_storage implementation
     612              : //============================================================================
     613              : 
     614              : prange_storage *
     615    100401805 : prange_storage::alloc (vrange_internal_alloc &allocator, const prange &r,
     616              :                        bool shared_p)
     617              : {
     618    100401805 :   unsigned num_words;
     619    100401805 :   prange_format (r, num_words);
     620    100401805 :   size_t extra_size = 0;
     621    100401805 :   if (num_words)
     622              :     {
     623      2345577 :       unsigned short precision = TYPE_PRECISION (r.type ());
     624      2345577 :       extra_size = trailing_wide_ints<PRANGE_STORAGE_NINTS>
     625      2345577 :                      ::extra_size (precision, num_words);
     626              :     }
     627              : 
     628    100401805 :   size_t size = sizeof (prange_storage) + extra_size;
     629    100401805 :   prange_storage *p = static_cast <prange_storage *> (allocator.alloc (size));
     630    100401805 :   new (p) prange_storage (r);
     631    100401805 :   if (p->m_pt && !shared_p)
     632      2039873 :     p->m_pt = unshare_expr_without_location (p->m_pt);
     633              : 
     634    100401805 :   return p;
     635              : }
     636              : 
     637              : // Initialize the storage with R.
     638              : 
     639    100401805 : prange_storage::prange_storage (const prange &r) : vrange_storage (VR_PRANGE)
     640              : {
     641    100401805 :   unsigned num_words;
     642    100401805 :   enum prange_kind kind = prange_format (r, num_words);
     643    100401805 :   unsigned short prec = (kind == PR_UNDEFINED) ? 0 : TYPE_PRECISION (r.type ());
     644    100401805 :   m_trailing_ints.set_precision (prec, num_words);
     645    100401805 :   set_prange (r);
     646    100401805 : }
     647              : 
     648              : // Return TRUE if R is exactly the nonzero set [1, MAX], which prange_storage
     649              : // encodes compactly as PR_NONZERO.
     650              : //
     651              : // Compare the bounds against a fresh set_nonzero () rather than using
     652              : // prange::operator==, because operator== also compares the bitmask and
     653              : // points-to info, which are stored separately here, so a non-null pointer that
     654              : // also carries e.g. an alignment bitmask still belongs in PR_NONZERO.
     655              : 
     656              : static inline bool
     657    145690677 : nonzero_range_p (const prange &r)
     658              : {
     659    145690677 :   prange nonzero (r.type ());
     660    145690677 :   nonzero.set_nonzero (r.type ());
     661    291381354 :   return (r.lower_bound () == nonzero.lower_bound ()
     662    289046675 :           && r.upper_bound () == nonzero.upper_bound ());
     663    145690677 : }
     664              : 
     665              : // Return the prange_kind for range R, and the number of words of storage
     666              : // it requires in NUM_WORDS.
     667              : 
     668              : enum prange_kind
     669    311726519 : prange_storage::prange_format (const prange &r, unsigned &num_words)
     670              : {
     671    311726519 :   num_words = 0;
     672    311726519 :   if (r.undefined_p ())
     673              :     return PR_UNDEFINED;
     674              : 
     675    281587675 :   if (r.varying_p ())
     676              :     return PR_VARYING;
     677              : 
     678    132134128 :   if (r.zero_p ())
     679              :     return PR_ZERO;
     680              : 
     681    131276579 :   enum prange_kind kind = PR_NONZERO;
     682              : 
     683    131276579 :   if (!nonzero_range_p (r))
     684              :     {
     685      2996377 :       prange tmp (r.type ());
     686      5992754 :       if (r.lower_bound () == tmp.lower_bound ()
     687      4360684 :           && r.upper_bound () == tmp.upper_bound ())
     688              :         kind = PR_FULL;
     689              :       else
     690              :         {
     691              :           // PR_OTHER requires words of storage for the end points.
     692      2779266 :           kind = PR_OTHER;
     693      2779266 :           num_words += 2;
     694              :         }
     695      2996377 :     }
     696              : 
     697              :   // Bitmasks require 2 words of storage.
     698    131276579 :   if (!r.get_bitmask ().unknown_p ())
     699      5261652 :     num_words += 2;
     700              : 
     701              :   // PR_FULL must have a bitmask or points to, or it should be PR_VARYING.
     702    131493690 :   gcc_checking_assert (kind != PR_FULL || !r.get_bitmask ().unknown_p ()
     703              :                        || r.m_pt != NULL_TREE);
     704    131276579 :   return kind;
     705              : }
     706              : 
     707              : void
     708    103906362 : prange_storage::set_prange (const prange &r)
     709              : {
     710    103906362 :   unsigned num_words;
     711    103906362 :   m_kind = prange_format (r, num_words);
     712    103906362 :   m_has_bitmask = false;
     713    103906362 :   m_points_to_p = false;
     714    103906362 :   m_pt = r.m_pt;
     715              : 
     716    103906362 :   unsigned index = 0;
     717              : 
     718    103906362 :   switch (m_kind)
     719              :     {
     720     60156698 :       case PR_UNDEFINED:
     721     60156698 :       case PR_VARYING:
     722     60156698 :       case PR_ZERO:
     723     60156698 :         return;
     724              :       case PR_NONZERO:
     725              :       case PR_FULL:
     726              :         break;
     727       856699 :       case PR_OTHER:
     728       856699 :         set_word (index++, r.lower_bound (), r.type ());
     729       856699 :         set_word (index++, r.upper_bound (), r.type ());
     730       856699 :         break;
     731            0 :       default:
     732            0 :         gcc_unreachable ();
     733              :     }
     734              : 
     735     43749664 :   m_has_bitmask = !r.get_bitmask ().unknown_p ();
     736     43749664 :   m_points_to_p = r.m_points_to_p;
     737              : 
     738     43749664 :   if (m_has_bitmask)
     739              :     {
     740      1762019 :       irange_bitmask bm = r.m_bitmask;
     741      1762019 :       set_word (index++, r.m_bitmask.value (), r.type ());
     742      1762019 :       set_word (index++, r.m_bitmask.mask (), r.type ());
     743      1762019 :     }
     744     43749664 :   gcc_checking_assert (index == num_words);
     745              : }
     746              : 
     747              : void
     748    363735011 : prange_storage::get_prange (prange &r, tree type) const
     749              : {
     750    363735011 :   gcc_checking_assert (r.supports_type_p (type));
     751    363735011 :   unsigned index = 0;
     752    363735011 :   switch (m_kind)
     753              :     {
     754       972771 :       case PR_UNDEFINED:
     755       972771 :         r.set_undefined ();
     756       972771 :         return;
     757              : 
     758    201409907 :       case PR_VARYING:
     759    201409907 :         r.set_varying (type);
     760    201409907 :         return;
     761              : 
     762       484954 :       case PR_ZERO:
     763       484954 :         r.set_zero (type);
     764       484954 :         return;
     765              : 
     766    157468708 :       case PR_NONZERO:
     767    157468708 :         r.set_nonzero (type);
     768    157468708 :         break;
     769              : 
     770       522940 :       case PR_FULL:
     771       522940 :         {
     772       522940 :           r.m_kind = VR_RANGE;
     773       522940 :           r.m_type = type;
     774       522940 :           prange tmp (type);
     775       522940 :           r.m_min = tmp.lower_bound ();
     776       522940 :           r.m_max = tmp.upper_bound ();
     777       522940 :           break;
     778       522940 :         }
     779              : 
     780      2875731 :       case PR_OTHER:
     781      2875731 :         {
     782      2875731 :           gcc_checking_assert (m_kind == PR_OTHER);
     783      2875731 :           r.m_kind = VR_RANGE;
     784      2875731 :           r.m_type = type;
     785      2875731 :           r.m_min = get_word (index++, type);
     786      2875731 :           r.m_max = get_word (index++, type);
     787      2875731 :           break;
     788              :         }
     789            0 :       default:
     790            0 :         gcc_unreachable ();
     791              :     }
     792              : 
     793    160867379 :   if (m_has_bitmask)
     794              :     {
     795     17455629 :       wide_int value = get_word (index++, type);
     796     17455629 :       wide_int mask = get_word (index++, type);
     797     17455629 :       r.m_bitmask = irange_bitmask (value, mask);
     798     17455629 :     }
     799              :   else
     800    143411750 :     r.m_bitmask.set_unknown (TYPE_PRECISION (type));
     801              : 
     802    160867379 :   r.m_points_to_p = m_points_to_p;
     803    160867379 :   r.m_pt = m_pt;
     804              : 
     805    160867379 :   if (flag_checking)
     806    160867244 :     r.verify_range ();
     807              : }
     808              : 
     809              : bool
     810     14843018 : prange_storage::equal_p (const prange &r) const
     811              : {
     812     14843018 :   if (r.undefined_p ())
     813            0 :     return m_kind == PR_UNDEFINED;
     814              : 
     815     14843018 :   unsigned index = 0;
     816     14843018 :   switch (m_kind)
     817              :     {
     818         5596 :       case PR_VARYING:
     819         5596 :         return r.varying_p ();
     820              : 
     821        85769 :       case PR_ZERO:
     822        85769 :         return r.zero_p ();
     823              : 
     824     14414098 :       case PR_NONZERO:
     825     14414098 :         if (!nonzero_range_p (r))
     826              :           return false;
     827              :         break;
     828              : 
     829       296390 :       case PR_FULL:
     830       296390 :         if (r.m_min != wi::zero (TYPE_PRECISION (r.m_type))
     831       592382 :             || r.m_max != wi::max_value (TYPE_PRECISION (r.m_type),
     832       147996 :                                          TYPE_SIGN (r.m_type)))
     833              :           return false;
     834              :         break;
     835              : 
     836        41165 :       case PR_OTHER:
     837        82330 :         if (r.m_min != get_word (index++, r.m_type)
     838        65635 :             || r.m_max != get_word (index++, r.m_type))
     839              :           return false;
     840              :         break;
     841              : 
     842            0 :       default:
     843            0 :         gcc_unreachable ();
     844              :     }
     845              : 
     846     14182554 :   if (m_has_bitmask)
     847              :     {
     848      8355505 :       wide_int value = get_word (index++, r.m_type);
     849      8355505 :       wide_int mask = get_word (index++, r.m_type);
     850      8355505 :       if (r.m_bitmask != irange_bitmask (value, mask))
     851      4073820 :         return false;
     852      8355505 :     }
     853              :   else
     854      5827049 :     if (!r.m_bitmask.unknown_p ())
     855              :       return false;
     856              : 
     857      8509647 :   if (m_pt != r.m_pt)
     858              :     return false;
     859              :   // Storage objects are only equal If they point to the same memory.
     860      1499768 :   if (m_points_to_p != r.m_points_to_p)
     861            0 :     return false;
     862              : 
     863              :   return true;
     864              : }
     865              : 
     866              : bool
     867      7032935 : prange_storage::fits_p (const prange &r) const
     868              : {
     869              :   // Undefined ranges always fit, because they don't store anything in
     870              :   // the trailing wide ints.
     871      7032935 :   if (r.undefined_p ())
     872              :     return true;
     873              : 
     874      7016547 :   unsigned num_words;
     875      7016547 :   prange_format (r, num_words);
     876      7016547 :   return num_words <= m_trailing_ints.num_elements ();
     877              : }
     878              : 
     879              : 
     880              : static vrange_allocator ggc_vrange_allocator (true);
     881              : 
     882            0 : vrange_storage *ggc_alloc_vrange_storage (tree type)
     883              : {
     884            0 :   return ggc_vrange_allocator.clone_varying (type);
     885              : }
     886              : 
     887     20789801 : vrange_storage *ggc_alloc_vrange_storage (const vrange &r, bool shared_p)
     888              : {
     889     20789801 :   return ggc_vrange_allocator.clone (r, shared_p);
     890              : }
        

Generated by: LCOV version 2.4-beta

LCOV profile is generated on x86_64 machine using following configure options: configure --disable-bootstrap --enable-coverage=opt --enable-languages=c,c++,fortran,go,jit,lto,rust,m2 --enable-host-shared. GCC test suite is run with the built compiler.