1 //===--- APSIntType.cpp - Simple record of the type of APSInts ------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 #include "clang/StaticAnalyzer/Core/PathSensitive/APSIntType.h"
11 using namespace clang;
14 APSIntType::RangeTestResultKind
15 APSIntType::testInRange(const llvm::APSInt &Value,
16 bool AllowSignConversions) const {
18 // Negative numbers cannot be losslessly converted to unsigned type.
19 if (IsUnsigned && !AllowSignConversions &&
20 Value.isSigned() && Value.isNegative())
24 if (AllowSignConversions) {
25 if (Value.isSigned() && !IsUnsigned)
26 MinBits = Value.getMinSignedBits();
28 MinBits = Value.getActiveBits();
31 // Signed integers can be converted to signed integers of the same width
32 // or (if positive) unsigned integers with one fewer bit.
33 // Unsigned integers can be converted to unsigned integers of the same width
34 // or signed integers with one more bit.
36 MinBits = Value.getMinSignedBits() - IsUnsigned;
38 MinBits = Value.getActiveBits() + !IsUnsigned;
41 if (MinBits <= BitWidth)
44 if (Value.isSigned() && Value.isNegative())