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| 1 | +//===----------------------------------------------------------------------===// |
| 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 "FloatTypesCheck.h" |
| 10 | +#include "clang/ASTMatchers/ASTMatchFinder.h" |
| 11 | +#include "clang/Lex/Lexer.h" |
| 12 | + |
| 13 | +namespace clang { |
| 14 | + |
| 15 | +using namespace ast_matchers; |
| 16 | + |
| 17 | +namespace { |
| 18 | + |
| 19 | +AST_POLYMORPHIC_MATCHER(isValidAndNotInMacro, |
| 20 | + AST_POLYMORPHIC_SUPPORTED_TYPES(TypeLoc, |
| 21 | + FloatingLiteral)) { |
| 22 | + const SourceLocation Loc = Node.getBeginLoc(); |
| 23 | + return Loc.isValid() && !Loc.isMacroID(); |
| 24 | +} |
| 25 | + |
| 26 | +AST_MATCHER(TypeLoc, isLongDoubleType) { |
| 27 | + TypeLoc TL = Node; |
| 28 | + if (const auto QualLoc = Node.getAs<QualifiedTypeLoc>()) |
| 29 | + TL = QualLoc.getUnqualifiedLoc(); |
| 30 | + |
| 31 | + const auto BuiltinLoc = TL.getAs<BuiltinTypeLoc>(); |
| 32 | + if (!BuiltinLoc) |
| 33 | + return false; |
| 34 | + |
| 35 | + if (const auto *BT = BuiltinLoc.getTypePtr()) |
| 36 | + return BT->getKind() == BuiltinType::LongDouble; |
| 37 | + return false; |
| 38 | +} |
| 39 | + |
| 40 | +AST_MATCHER(FloatingLiteral, isLongDoubleLiteral) { |
| 41 | + if (const auto *BT = |
| 42 | + dyn_cast_if_present<BuiltinType>(Node.getType().getTypePtr())) |
| 43 | + return BT->getKind() == BuiltinType::LongDouble; |
| 44 | + return false; |
| 45 | +} |
| 46 | + |
| 47 | +} // namespace |
| 48 | + |
| 49 | +namespace tidy::google::runtime { |
| 50 | + |
| 51 | +void RuntimeFloatCheck::registerMatchers(MatchFinder *Finder) { |
| 52 | + Finder->addMatcher(typeLoc(loc(realFloatingPointType()), |
| 53 | + isValidAndNotInMacro(), isLongDoubleType()) |
| 54 | + .bind("longDoubleTypeLoc"), |
| 55 | + this); |
| 56 | + Finder->addMatcher(floatLiteral(isValidAndNotInMacro(), isLongDoubleLiteral()) |
| 57 | + .bind("longDoubleFloatLiteral"), |
| 58 | + this); |
| 59 | +} |
| 60 | + |
| 61 | +void RuntimeFloatCheck::check(const MatchFinder::MatchResult &Result) { |
| 62 | + if (const auto *TL = Result.Nodes.getNodeAs<TypeLoc>("longDoubleTypeLoc")) { |
| 63 | + diag(TL->getBeginLoc(), "%0 type is not portable and should not be used") |
| 64 | + << TL->getType(); |
| 65 | + } |
| 66 | + |
| 67 | + if (const auto *FL = |
| 68 | + Result.Nodes.getNodeAs<FloatingLiteral>("longDoubleFloatLiteral")) { |
| 69 | + diag(FL->getBeginLoc(), "%0 type from literal suffix 'L' is not portable " |
| 70 | + "and should not be used") |
| 71 | + << FL->getType(); |
| 72 | + } |
| 73 | +} |
| 74 | + |
| 75 | +} // namespace tidy::google::runtime |
| 76 | + |
| 77 | +} // namespace clang |
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