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65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
/* Misc range functions.
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Copyright (C) 2017-2022 Free Software Foundation, Inc.
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Contributed by Aldy Hernandez <aldyh@redhat.com>.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "backend.h"
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#include "tree.h"
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#include "gimple.h"
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#include "gimple-pretty-print.h"
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#include "fold-const.h"
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#include "ssa.h"
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#include "range.h"
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value_range
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range_zero (tree type)
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{
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return value_range (build_zero_cst (type), build_zero_cst (type));
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}
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value_range
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range_nonzero (tree type)
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{
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return value_range (build_zero_cst (type), build_zero_cst (type),
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VR_ANTI_RANGE);
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}
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value_range
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range_positives (tree type)
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{
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unsigned prec = TYPE_PRECISION (type);
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signop sign = TYPE_SIGN (type);
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return value_range (type, wi::zero (prec), wi::max_value (prec, sign));
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}
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value_range
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range_negatives (tree type)
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{
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unsigned prec = TYPE_PRECISION (type);
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signop sign = TYPE_SIGN (type);
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value_range r;
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if (sign == UNSIGNED)
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r.set_undefined ();
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else
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r = value_range (type, wi::min_value (prec, sign), wi::minus_one (prec));
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return r;
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}
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