1 //===--- APSIntType.cpp - Simple record of the type of APSInts ------------===// 2 // 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 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "clang/StaticAnalyzer/Core/PathSensitive/APSIntType.h" 10 11 using namespace clang; 12 using namespace ento; 13 14 APSIntType::RangeTestResultKind 15 APSIntType::testInRange(const llvm::APSInt &Value, 16 bool AllowSignConversions) const { 17 18 // Negative numbers cannot be losslessly converted to unsigned type. 19 if (IsUnsigned && !AllowSignConversions && 20 Value.isSigned() && Value.isNegative()) 21 return RTR_Below; 22 23 unsigned MinBits; 24 if (AllowSignConversions) { 25 if (Value.isSigned() && !IsUnsigned) 26 MinBits = Value.getMinSignedBits(); 27 else 28 MinBits = Value.getActiveBits(); 29 30 } else { 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. 35 if (Value.isSigned()) 36 MinBits = Value.getMinSignedBits() - IsUnsigned; 37 else 38 MinBits = Value.getActiveBits() + !IsUnsigned; 39 } 40 41 if (MinBits <= BitWidth) 42 return RTR_Within; 43 44 if (Value.isSigned() && Value.isNegative()) 45 return RTR_Below; 46 else 47 return RTR_Above; 48 } 49
Indexes created Tue Jun 16 00:25:01 UTC 2026