mirror of
https://github.com/Gericom/teak-llvm.git
synced 2025-06-20 20:15:49 -04:00
4241cedb68
Summary: Inside a range-based for-loop over an array, the compiler generates pointer arithmetic (end = array + size). Don't flag this. Reviewers: alexfh, sbenza, bkramer, aaron.ballman Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D14582 llvm-svn: 254182
58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
//===--- ProBoundsPointerArithmeticCheck.cpp - clang-tidy------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "ProBoundsPointerArithmeticCheck.h"
|
|
#include "clang/AST/ASTContext.h"
|
|
#include "clang/ASTMatchers/ASTMatchFinder.h"
|
|
|
|
using namespace clang::ast_matchers;
|
|
|
|
namespace clang {
|
|
namespace tidy {
|
|
|
|
void ProBoundsPointerArithmeticCheck::registerMatchers(MatchFinder *Finder) {
|
|
if (!getLangOpts().CPlusPlus)
|
|
return;
|
|
|
|
// Flag all operators +, -, +=, -=, ++, -- that result in a pointer
|
|
Finder->addMatcher(
|
|
binaryOperator(
|
|
anyOf(hasOperatorName("+"), hasOperatorName("-"),
|
|
hasOperatorName("+="), hasOperatorName("-=")),
|
|
hasType(pointerType()),
|
|
unless(hasLHS(ignoringImpCasts(declRefExpr(to(isImplicit()))))))
|
|
.bind("expr"),
|
|
this);
|
|
|
|
Finder->addMatcher(
|
|
unaryOperator(anyOf(hasOperatorName("++"), hasOperatorName("--")),
|
|
hasType(pointerType()))
|
|
.bind("expr"),
|
|
this);
|
|
|
|
// Array subscript on a pointer (not an array) is also pointer arithmetic
|
|
Finder->addMatcher(
|
|
arraySubscriptExpr(
|
|
hasBase(ignoringImpCasts(
|
|
anyOf(hasType(pointerType()),
|
|
hasType(decayedType(hasDecayedType(pointerType())))))))
|
|
.bind("expr"),
|
|
this);
|
|
}
|
|
|
|
void
|
|
ProBoundsPointerArithmeticCheck::check(const MatchFinder::MatchResult &Result) {
|
|
const auto *MatchedExpr = Result.Nodes.getNodeAs<Expr>("expr");
|
|
|
|
diag(MatchedExpr->getExprLoc(), "do not use pointer arithmetic");
|
|
}
|
|
|
|
} // namespace tidy
|
|
} // namespace clang
|