LCOV - code coverage report
Current view: top level - gcc - rtlhooks.c (source / functions) Hit Total Coverage
Test: gcc.info Lines: 32 34 94.1 %
Date: 2020-04-04 11:58:09 Functions: 4 5 80.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : /* Generic hooks for the RTL middle-end.
       2                 :            :    Copyright (C) 2004-2020 Free Software Foundation, Inc.
       3                 :            : 
       4                 :            : This file is part of GCC.
       5                 :            : 
       6                 :            : GCC is free software; you can redistribute it and/or modify it under
       7                 :            : the terms of the GNU General Public License as published by the Free
       8                 :            : Software Foundation; either version 3, or (at your option) any later
       9                 :            : version.
      10                 :            : 
      11                 :            : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      12                 :            : WARRANTY; without even the implied warranty of MERCHANTABILITY or
      13                 :            : FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      14                 :            : for more details.
      15                 :            : 
      16                 :            : You should have received a copy of the GNU General Public License
      17                 :            : along with GCC; see the file COPYING3.  If not see
      18                 :            : <http://www.gnu.org/licenses/>.  */
      19                 :            : 
      20                 :            : #include "config.h"
      21                 :            : #include "system.h"
      22                 :            : #include "coretypes.h"
      23                 :            : #include "tm.h"
      24                 :            : #include "function.h"
      25                 :            : #include "rtl.h"
      26                 :            : #include "tree.h"
      27                 :            : #include "insn-config.h"
      28                 :            : #include "memmodel.h"
      29                 :            : #include "emit-rtl.h"
      30                 :            : #include "recog.h"
      31                 :            : #include "rtlhooks-def.h"
      32                 :            : #include "explow.h"
      33                 :            : #include "target.h"
      34                 :            : 
      35                 :            : 
      36                 :            : /* For speed, we will copy the RTX hooks struct member-by-member
      37                 :            :    instead of doing indirect calls.  For these reason, we initialize
      38                 :            :    *two* struct rtl_hooks globals: rtl_hooks is the one that is used
      39                 :            :    to actually call the hooks, while general_rtl_hooks is used
      40                 :            :    to restore the hooks by passes that modify them.  */
      41                 :            : 
      42                 :            : const struct rtl_hooks general_rtl_hooks = RTL_HOOKS_INITIALIZER;
      43                 :            : struct rtl_hooks rtl_hooks = RTL_HOOKS_INITIALIZER;
      44                 :            : 
      45                 :            : rtx
      46                 :    2947990 : gen_lowpart_general (machine_mode mode, rtx x)
      47                 :            : {
      48                 :    2967400 :   rtx result = gen_lowpart_common (mode, x);
      49                 :            : 
      50                 :    2967400 :   if (result)
      51                 :            :     return result;
      52                 :            :   /* Handle SUBREGs and hard REGs that were rejected by
      53                 :            :      simplify_gen_subreg.  */
      54                 :      70675 :   else if (REG_P (x) || GET_CODE (x) == SUBREG)
      55                 :            :     {
      56                 :         75 :       result = gen_lowpart_common (mode, copy_to_reg (x));
      57                 :         75 :       gcc_assert (result != 0);
      58                 :            :       return result;
      59                 :            :     }
      60                 :            :   else
      61                 :            :     {
      62                 :            :       /* The only additional case we can do is MEM.  */
      63                 :      70600 :       gcc_assert (MEM_P (x));
      64                 :            : 
      65                 :            :       /* The following exposes the use of "x" to CSE.  */
      66                 :      70600 :       scalar_int_mode xmode;
      67                 :      70600 :       if (is_a <scalar_int_mode> (GET_MODE (x), &xmode)
      68                 :      26428 :           && GET_MODE_SIZE (xmode) <= UNITS_PER_WORD
      69                 :      21397 :           && TRULY_NOOP_TRUNCATION_MODES_P (mode, xmode)
      70                 :      21397 :           && !reload_completed)
      71                 :      19407 :         return gen_lowpart_general (mode, force_reg (xmode, x));
      72                 :            : 
      73                 :      51193 :       poly_int64 offset = byte_lowpart_offset (mode, GET_MODE (x));
      74                 :      51193 :       return adjust_address (x, mode, offset);
      75                 :            :     }
      76                 :            : }
      77                 :            : 
      78                 :            : rtx
      79                 :   14356800 : reg_num_sign_bit_copies_general (const_rtx, scalar_int_mode, scalar_int_mode,
      80                 :            :                                  unsigned int *)
      81                 :            : {
      82                 :   14356800 :   return NULL;
      83                 :            : }
      84                 :            : 
      85                 :            : rtx
      86                 :   32827300 : reg_nonzero_bits_general (const_rtx, scalar_int_mode, scalar_int_mode,
      87                 :            :                           unsigned HOST_WIDE_INT *)
      88                 :            : {
      89                 :   32827300 :   return NULL;
      90                 :            : }
      91                 :            : 
      92                 :            : bool
      93                 :          0 : reg_truncated_to_mode_general (machine_mode mode ATTRIBUTE_UNUSED,
      94                 :            :                                const_rtx x ATTRIBUTE_UNUSED)
      95                 :            : {
      96                 :          0 :   return false;
      97                 :            : }
      98                 :            : 
      99                 :            : /* Assuming that X is an rtx (e.g., MEM, REG or SUBREG) for a fixed-point
     100                 :            :    number, return an rtx (MEM, SUBREG, or CONST_INT) that refers to the
     101                 :            :    least-significant part of X.
     102                 :            :    MODE specifies how big a part of X to return.
     103                 :            : 
     104                 :            :    If the requested operation cannot be done, 0 is returned.
     105                 :            : 
     106                 :            :    This is similar to gen_lowpart_general.  */
     107                 :            : 
     108                 :            : rtx
     109                 :   14220400 : gen_lowpart_if_possible (machine_mode mode, rtx x)
     110                 :            : {
     111                 :   14220400 :   rtx result = gen_lowpart_common (mode, x);
     112                 :            : 
     113                 :   14220400 :   if (result)
     114                 :            :     return result;
     115                 :      16081 :   else if (MEM_P (x))
     116                 :            :     {
     117                 :            :       /* This is the only other case we handle.  */
     118                 :       3601 :       poly_int64 offset = byte_lowpart_offset (mode, GET_MODE (x));
     119                 :       3601 :       rtx new_rtx = adjust_address_nv (x, mode, offset);
     120                 :       7202 :       if (! memory_address_addr_space_p (mode, XEXP (new_rtx, 0),
     121                 :       3601 :                                          MEM_ADDR_SPACE (x)))
     122                 :            :         return 0;
     123                 :            : 
     124                 :       3347 :       return new_rtx;
     125                 :            :     }
     126                 :      12480 :   else if (mode != GET_MODE (x) && GET_MODE (x) != VOIDmode && !SUBREG_P (x)
     127                 :      24950 :            && validate_subreg (mode, GET_MODE (x), x,
     128                 :            :                                subreg_lowpart_offset (mode, GET_MODE (x))))
     129                 :      12470 :     return gen_lowpart_SUBREG (mode, x);
     130                 :            :   else
     131                 :         10 :     return 0;
     132                 :            : }
     133                 :            : 

Generated by: LCOV version 1.0

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 --enable-host-shared. GCC test suite is run with the built compiler.