1 //===--- NoIntToPtrCheck.cpp - clang-tidy ---------------------------------===//
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 "NoIntToPtrCheck.h"
10 #include "clang/AST/ASTContext.h"
11 #include "clang/ASTMatchers/ASTMatchFinder.h"
12 
13 using namespace clang::ast_matchers;
14 
15 namespace clang {
16 namespace tidy {
17 namespace performance {
18 
registerMatchers(MatchFinder * Finder)19 void NoIntToPtrCheck::registerMatchers(MatchFinder *Finder) {
20   Finder->addMatcher(castExpr(hasCastKind(CK_IntegralToPointer),
21                               unless(hasSourceExpression(integerLiteral())))
22                          .bind("x"),
23                      this);
24 }
25 
check(const MatchFinder::MatchResult & Result)26 void NoIntToPtrCheck::check(const MatchFinder::MatchResult &Result) {
27   const auto *MatchedCast = Result.Nodes.getNodeAs<CastExpr>("x");
28   diag(MatchedCast->getBeginLoc(),
29        "integer to pointer cast pessimizes optimization opportunities");
30 }
31 
32 } // namespace performance
33 } // namespace tidy
34 } // namespace clang
35