typeck.c (cp_build_function_call_vec): When mark_used fails unconditionally return...
[official-gcc.git] / gcc / rtx-vector-builder.h
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1 /* A class for building vector rtx constants.
2 Copyright (C) 2017-2019 Free Software Foundation, Inc.
4 This file is part of GCC.
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.
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.
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/>. */
20 #ifndef GCC_RTX_VECTOR_BUILDER_H
21 #define GCC_RTX_VECTOR_BUILDER_H
23 #include "vector-builder.h"
25 /* This class is used to build VECTOR_CSTs from a sequence of elements.
26 See vector_builder for more details. */
27 class rtx_vector_builder : public vector_builder<rtx, rtx_vector_builder>
29 typedef vector_builder<rtx, rtx_vector_builder> parent;
30 friend class vector_builder<rtx, rtx_vector_builder>;
32 public:
33 rtx_vector_builder () : m_mode (VOIDmode) {}
34 rtx_vector_builder (machine_mode, unsigned int, unsigned int);
35 rtx build (rtvec);
36 rtx build ();
38 machine_mode mode () const { return m_mode; }
40 void new_vector (machine_mode, unsigned int, unsigned int);
42 private:
43 bool equal_p (rtx, rtx) const;
44 bool allow_steps_p () const;
45 bool integral_p (rtx) const;
46 wide_int step (rtx, rtx) const;
47 rtx apply_step (rtx, unsigned int, const wide_int &) const;
48 bool can_elide_p (rtx) const { return true; }
49 void note_representative (rtx *, rtx) {}
51 rtx find_cached_value ();
53 machine_mode m_mode;
56 /* Create a new builder for a vector of mode MODE. Initially encode the
57 value as NPATTERNS interleaved patterns with NELTS_PER_PATTERN elements
58 each. */
60 inline
61 rtx_vector_builder::rtx_vector_builder (machine_mode mode,
62 unsigned int npatterns,
63 unsigned int nelts_per_pattern)
65 new_vector (mode, npatterns, nelts_per_pattern);
68 /* Start building a new vector of mode MODE. Initially encode the value
69 as NPATTERNS interleaved patterns with NELTS_PER_PATTERN elements each. */
71 inline void
72 rtx_vector_builder::new_vector (machine_mode mode, unsigned int npatterns,
73 unsigned int nelts_per_pattern)
75 m_mode = mode;
76 parent::new_vector (GET_MODE_NUNITS (mode), npatterns, nelts_per_pattern);
79 /* Return true if elements ELT1 and ELT2 are equal. */
81 inline bool
82 rtx_vector_builder::equal_p (rtx elt1, rtx elt2) const
84 return rtx_equal_p (elt1, elt2);
87 /* Return true if a stepped representation is OK. We don't allow
88 linear series for anything other than integers, to avoid problems
89 with rounding. */
91 inline bool
92 rtx_vector_builder::allow_steps_p () const
94 return is_a <scalar_int_mode> (GET_MODE_INNER (m_mode));
97 /* Return true if element ELT can be interpreted as an integer. */
99 inline bool
100 rtx_vector_builder::integral_p (rtx elt) const
102 return CONST_SCALAR_INT_P (elt);
105 /* Return the value of element ELT2 minus the value of element ELT1.
106 Both elements are known to be CONST_SCALAR_INT_Ps. */
108 inline wide_int
109 rtx_vector_builder::step (rtx elt1, rtx elt2) const
111 return wi::sub (rtx_mode_t (elt2, GET_MODE_INNER (m_mode)),
112 rtx_mode_t (elt1, GET_MODE_INNER (m_mode)));
115 #endif