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//===--- NoAssemblerCheck.cpp - clang-tidy---------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "NoAssemblerCheck.h"
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace hicpp {
namespace {
AST_MATCHER(VarDecl, isAsm) { return Node.hasAttr<clang::AsmLabelAttr>(); }
const ast_matchers::internal::VariadicDynCastAllOfMatcher<Decl,
FileScopeAsmDecl>
fileScopeAsmDecl;
} // namespace
void NoAssemblerCheck::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(asmStmt().bind("asm-stmt"), this);
Finder->addMatcher(fileScopeAsmDecl().bind("asm-file-scope"), this);
Finder->addMatcher(varDecl(isAsm()).bind("asm-var"), this);
}
void NoAssemblerCheck::check(const MatchFinder::MatchResult &Result) {
SourceLocation ASMLocation;
if (const auto *ASM = Result.Nodes.getNodeAs<AsmStmt>("asm-stmt"))
ASMLocation = ASM->getAsmLoc();
else if (const auto *ASM =
Result.Nodes.getNodeAs<FileScopeAsmDecl>("asm-file-scope"))
ASMLocation = ASM->getAsmLoc();
else if (const auto *ASM = Result.Nodes.getNodeAs<VarDecl>("asm-var"))
ASMLocation = ASM->getLocation();
else
llvm_unreachable("Unhandled case in matcher.");
diag(ASMLocation, "do not use inline assembler in safety-critical code");
}
} // namespace hicpp
} // namespace tidy
} // namespace clang
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