clang-tools-extra/clang-tidy/performance/NoIntToPtrCheck.cpp

   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::tidy::performance {
  16
  17 void NoIntToPtrCheck::registerMatchers(MatchFinder *Finder) {
  18   Finder->addMatcher(castExpr(hasCastKind(CK_IntegralToPointer),
  19                               unless(hasSourceExpression(integerLiteral())))
  20                          .bind("x"),
  21                      this);
  22 }
  23
  24 void NoIntToPtrCheck::check(const MatchFinder::MatchResult &Result) {
  25   const auto *MatchedCast = Result.Nodes.getNodeAs<CastExpr>("x");
  26   diag(MatchedCast->getBeginLoc(),
  27        "integer to pointer cast pessimizes optimization opportunities");
  28 }
  29
  30 } // namespace clang::tidy::performance