[clang-tidy] Tweak diag ranges for bugprone-sizeof-expression

[njames93]

Summary

Provide more useful warning locations and diagnostic ranges.

[njames93]

Fix clangd test cases failing.

[PiotrZSL]

LGTM

[PiotrZSL]

Rebase

clang-tools-extra/clang-tidy/bugprone/SizeofExpressionCheck.cpp

Finder->addMatcher(
                                        integerLiteral(equals(0)),
                                        integerLiteral(isBiggerThan(0x80000))))))
             .bind("sizeof-compare-constant"),
         this);
   }
 
   // Detect expression like: sizeof(expr, expr); most likely an error.
   Finder->addMatcher(expr(sizeOfExpr(has(expr(ignoringParenImpCasts(
-                              binaryOperator(hasOperatorName(",")))))))
+                              binaryOperator(hasOperatorName(","))
+                                  .bind("sizeof-comma-binop"))))))
                          .bind("sizeof-comma-expr"),
                      this);
 
   // Detect sizeof(...) /sizeof(...));
   // FIXME:
   // Re-evaluate what cases to handle by the checker.
   // Probably any sizeof(A)/sizeof(B) should be error if
   // 'A' is not an array (type) and 'B' the (type of the) first element of it.
const auto PtrDiffExpr = binaryOperator(
       hasLHS(expr(hasType(hasUnqualifiedDesugaredType(pointerType(pointee(
           hasUnqualifiedDesugaredType(type().bind("left-ptr-type")))))))),
       hasRHS(expr(hasType(hasUnqualifiedDesugaredType(pointerType(pointee(
           hasUnqualifiedDesugaredType(type().bind("right-ptr-type")))))))));
 
   Finder->addMatcher(
       binaryOperator(
           hasAnyOperatorName("==", "!=", "<", "<=", ">", ">=", "+", "-"),
-          hasOperands(expr(anyOf(ignoringParenImpCasts(SizeOfExpr),
-                                 ignoringParenImpCasts(binaryOperator(
-                                     hasOperatorName("*"),
-                                     hasEitherOperand(
-                                         ignoringParenImpCasts(SizeOfExpr)))))),
-                      ignoringParenImpCasts(PtrDiffExpr)))
+          hasOperands(
+              expr(anyOf(
+                  ignoringParenImpCasts(SizeOfExpr.bind("sizeof-ptr-mul-expr")),
+                      hasEitherOperand(ignoringParenImpCasts(
+                          SizeOfExpr.bind("sizeof-ptr-mul-expr"))))))),
           .bind("sizeof-in-ptr-arithmetic-mul"),
       this);
 
-  Finder->addMatcher(binaryOperator(hasOperatorName("/"),
-                                    hasLHS(ignoringParenImpCasts(PtrDiffExpr)),
-                                    hasRHS(ignoringParenImpCasts(SizeOfExpr)))
-                         .bind("sizeof-in-ptr-arithmetic-div"),
-                     this);
+  Finder->addMatcher(
+      binaryOperator(
+          hasOperatorName("/"), hasLHS(ignoringParenImpCasts(PtrDiffExpr)),
+          hasRHS(ignoringParenImpCasts(SizeOfExpr.bind("sizeof-ptr-div-expr"))))
 }
 
 void SizeofExpressionCheck::check(const MatchFinder::MatchResult &Result) {
   const ASTContext &Ctx = *Result.Context;
 
   if (const auto *E = Result.Nodes.getNodeAs<Expr>("sizeof-constant")) {
-    diag(E->getBeginLoc(),
-         "suspicious usage of 'sizeof(K)'; did you mean 'K'?");
+    diag(E->getBeginLoc(), "suspicious usage of 'sizeof(K)'; did you mean 'K'?")
+        << E->getSourceRange();
   } else if (const auto *E =
                  Result.Nodes.getNodeAs<Expr>("sizeof-integer-call")) {
     diag(E->getBeginLoc(), "suspicious usage of 'sizeof()' on an expression "
-                           "that results in an integer");
+                           "that results in an integer")
+        << E->getSourceRange();
   } else if (const auto *E = Result.Nodes.getNodeAs<Expr>("sizeof-this")) {
     diag(E->getBeginLoc(),
-         "suspicious usage of 'sizeof(this)'; did you mean 'sizeof(*this)'");
+         "suspicious usage of 'sizeof(this)'; did you mean 'sizeof(*this)'")
+        << E->getSourceRange();
   } else if (const auto *E = Result.Nodes.getNodeAs<Expr>("sizeof-charp")) {
     diag(E->getBeginLoc(),
-         "suspicious usage of 'sizeof(char*)'; do you mean 'strlen'?");
+         "suspicious usage of 'sizeof(char*)'; do you mean 'strlen'?")
+        << E->getSourceRange();
   } else if (const auto *E =
                  Result.Nodes.getNodeAs<Expr>("sizeof-pointer-to-aggregate")) {
     diag(E->getBeginLoc(),
-         "suspicious usage of 'sizeof(A*)'; pointer to aggregate");
-  } else if (const auto *E =
-                 Result.Nodes.getNodeAs<Expr>("sizeof-compare-constant")) {
-    diag(E->getBeginLoc(),
-         "suspicious comparison of 'sizeof(expr)' to a constant");
+         "suspicious usage of 'sizeof(A*)'; pointer to aggregate")
+        << E->getSourceRange();
+  } else if (const auto *E = Result.Nodes.getNodeAs<BinaryOperator>(
+                 "sizeof-compare-constant")) {
+    diag(E->getOperatorLoc(),
+         "suspicious comparison of 'sizeof(expr)' to a constant")
+        << E->getLHS()->getSourceRange() << E->getRHS()->getSourceRange();
   } else if (const auto *E =
                  Result.Nodes.getNodeAs<Expr>("sizeof-comma-expr")) {
-    diag(E->getBeginLoc(), "suspicious usage of 'sizeof(..., ...)'");
+    const auto *BO =
+        Result.Nodes.getNodeAs<BinaryOperator>("sizeof-comma-binop");
+    assert(BO);
+    diag(BO->getOperatorLoc(), "suspicious usage of 'sizeof(..., ...)'")
+        << E->getSourceRange();
   } else if (const auto *E =
-                 Result.Nodes.getNodeAs<Expr>("sizeof-divide-expr")) {
+                 Result.Nodes.getNodeAs<BinaryOperator>("sizeof-divide-expr")) {
     const auto *NumTy = Result.Nodes.getNodeAs<Type>("num-type");
     const auto *DenomTy = Result.Nodes.getNodeAs<Type>("denom-type");
     const auto *ElementTy = Result.Nodes.getNodeAs<Type>("elem-type");
     const auto *PointedTy = Result.Nodes.getNodeAs<Type>("elem-ptr-type");
 
     CharUnits NumeratorSize = getSizeOfType(Ctx, NumTy);
     CharUnits DenominatorSize = getSizeOfType(Ctx, DenomTy);
     CharUnits ElementSize = getSizeOfType(Ctx, ElementTy);
 
     if (DenominatorSize > CharUnits::Zero() &&
         !NumeratorSize.isMultipleOf(DenominatorSize)) {
-      diag(E->getBeginLoc(), "suspicious usage of 'sizeof(...)/sizeof(...)';"
-                             " numerator is not a multiple of denominator");
+      diag(E->getOperatorLoc(), "suspicious usage of 'sizeof(...)/sizeof(...)';"
+                                " numerator is not a multiple of denominator")
+          << E->getLHS()->getSourceRange() << E->getRHS()->getSourceRange();
     } else if (ElementSize > CharUnits::Zero() &&
                DenominatorSize > CharUnits::Zero() &&
                ElementSize != DenominatorSize) {
-      diag(E->getBeginLoc(), "suspicious usage of 'sizeof(...)/sizeof(...)';"
-                             " numerator is not a multiple of denominator");
+      diag(E->getOperatorLoc(), "suspicious usage of 'sizeof(...)/sizeof(...)';"
+                                " numerator is not a multiple of denominator")
+          << E->getLHS()->getSourceRange() << E->getRHS()->getSourceRange();
     } else if (NumTy && DenomTy && NumTy == DenomTy) {
-      diag(E->getBeginLoc(),
-           "suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'");
+      diag(E->getOperatorLoc(),
+           "suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'")
+          << E->getLHS()->getSourceRange() << E->getRHS()->getSourceRange();
     } else if (PointedTy && DenomTy && PointedTy == DenomTy) {
-      diag(E->getBeginLoc(),
-           "suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'");
+      diag(E->getOperatorLoc(),
+           "suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'")
+          << E->getLHS()->getSourceRange() << E->getRHS()->getSourceRange();
     } else if (NumTy && DenomTy && NumTy->isPointerType() &&
                DenomTy->isPointerType()) {
-      diag(E->getBeginLoc(),
-           "suspicious usage of sizeof pointer 'sizeof(P*)/sizeof(Q*)'");
+      diag(E->getOperatorLoc(),
+           "suspicious usage of sizeof pointer 'sizeof(P*)/sizeof(Q*)'")
+          << E->getLHS()->getSourceRange() << E->getRHS()->getSourceRange();
     }
   } else if (const auto *E =
                  Result.Nodes.getNodeAs<Expr>("sizeof-sizeof-expr")) {
-    diag(E->getBeginLoc(), "suspicious usage of 'sizeof(sizeof(...))'");
-  } else if (const auto *E =
-                 Result.Nodes.getNodeAs<Expr>("sizeof-multiply-sizeof")) {
-    diag(E->getBeginLoc(), "suspicious 'sizeof' by 'sizeof' multiplication");
-  } else if (const auto *E =
-                 Result.Nodes.getNodeAs<Expr>("sizeof-in-ptr-arithmetic-mul")) {
+    diag(E->getBeginLoc(), "suspicious usage of 'sizeof(sizeof(...))'")
+        << E->getSourceRange();
+  } else if (const auto *E = Result.Nodes.getNodeAs<BinaryOperator>(
+                 "sizeof-multiply-sizeof")) {
+    diag(E->getOperatorLoc(), "suspicious 'sizeof' by 'sizeof' multiplication")
+        << E->getLHS()->getSourceRange() << E->getRHS()->getSourceRange();
+  } else if (const auto *E = Result.Nodes.getNodeAs<BinaryOperator>(
+                 "sizeof-in-ptr-arithmetic-mul")) {
     const auto *LPtrTy = Result.Nodes.getNodeAs<Type>("left-ptr-type");
     const auto *RPtrTy = Result.Nodes.getNodeAs<Type>("right-ptr-type");
     const auto *SizeofArgTy = Result.Nodes.getNodeAs<Type>("sizeof-arg-type");
+    const auto *SizeOfExpr =
+        Result.Nodes.getNodeAs<UnaryExprOrTypeTraitExpr>("sizeof-ptr-mul-expr");
 
     if ((LPtrTy == RPtrTy) && (LPtrTy == SizeofArgTy)) {
-      diag(E->getBeginLoc(), "suspicious usage of 'sizeof(...)' in "
-                              "pointer arithmetic");
+      diag(SizeOfExpr->getBeginLoc(), "suspicious usage of 'sizeof(...)' in "
+                                      "pointer arithmetic")
+          << SizeOfExpr->getSourceRange() << E->getOperatorLoc()
+          << E->getLHS()->getSourceRange() << E->getRHS()->getSourceRange();
     }
-  } else if (const auto *E =
-                 Result.Nodes.getNodeAs<Expr>("sizeof-in-ptr-arithmetic-div")) {
+  } else if (const auto *E = Result.Nodes.getNodeAs<BinaryOperator>(
+                 "sizeof-in-ptr-arithmetic-div")) {
     const auto *LPtrTy = Result.Nodes.getNodeAs<Type>("left-ptr-type");
     const auto *RPtrTy = Result.Nodes.getNodeAs<Type>("right-ptr-type");
     const auto *SizeofArgTy = Result.Nodes.getNodeAs<Type>("sizeof-arg-type");
+    const auto *SizeOfExpr =
+        Result.Nodes.getNodeAs<UnaryExprOrTypeTraitExpr>("sizeof-ptr-div-expr");
 
     if ((LPtrTy == RPtrTy) && (LPtrTy == SizeofArgTy)) {
-      diag(E->getBeginLoc(), "suspicious usage of 'sizeof(...)' in "
-                              "pointer arithmetic");
+      diag(SizeOfExpr->getBeginLoc(), "suspicious usage of 'sizeof(...)' in "
+                                      "pointer arithmetic")
+          << SizeOfExpr->getSourceRange() << E->getOperatorLoc()
+          << E->getLHS()->getSourceRange() << E->getRHS()->getSourceRange();
     }
   }
 }
 
 } // namespace bugprone
 } // namespace tidy
 } // namespace clang

clang-tools-extra/test/clang-tidy/checkers/bugprone-sizeof-expression.cpp

 
 int Test1(const char* ptr) {
   int sum = 0;
   sum += sizeof(LEN);
   // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(K)'
   sum += sizeof(LEN + 1);
   // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(K)'
   sum += sizeof(sum, LEN);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(..., ...)'
+  // CHECK-MESSAGES: :[[@LINE-1]]:20: warning: suspicious usage of 'sizeof(..., ...)'
   sum += sizeof(AsBool());
   // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof()' on an expression that results in an integer
   sum += sizeof(AsInt());
   // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof()' on an expression that results in an integer
   sum += sizeof(AsEnum());
   // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof()' on an expression that results in an integer
   sum += sizeof(AsEnumClass());
   // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof()' on an expression that results in an integer
int Test1(const char* ptr) {
   // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(sizeof(...))'
   sum += sizeof(LEN + (LEN + sizeof(X)));
   // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(sizeof(...))'
   sum += sizeof(LEN + -sizeof(X));
   // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(sizeof(...))'
   sum += sizeof(LEN + - + -sizeof(X));
   // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(sizeof(...))'
   sum += sizeof(char) / sizeof(char);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
+  // CHECK-MESSAGES: :[[@LINE-1]]:23: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
   sum += sizeof(A) / sizeof(S);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
+  // CHECK-MESSAGES: :[[@LINE-1]]:20: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
   sum += sizeof(char) / sizeof(int);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
+  // CHECK-MESSAGES: :[[@LINE-1]]:23: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
   sum += sizeof(char) / sizeof(A);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
+  // CHECK-MESSAGES: :[[@LINE-1]]:23: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
   sum += sizeof(B[0]) / sizeof(A);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
+  // CHECK-MESSAGES: :[[@LINE-1]]:23: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
   sum += sizeof(ptr) / sizeof(char);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'
+  // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'
   sum += sizeof(ptr) / sizeof(ptr[0]);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'
+  // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'
   sum += sizeof(ptr) / sizeof(char*);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(P*)/sizeof(Q*)'
+  // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: suspicious usage of sizeof pointer 'sizeof(P*)/sizeof(Q*)'
   sum += sizeof(ptr) / sizeof(void*);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(P*)/sizeof(Q*)'
+  // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: suspicious usage of sizeof pointer 'sizeof(P*)/sizeof(Q*)'
   sum += sizeof(ptr) / sizeof(const void volatile*);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(P*)/sizeof(Q*)'
+  // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: suspicious usage of sizeof pointer 'sizeof(P*)/sizeof(Q*)'
   sum += sizeof(ptr) / sizeof(char);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'
+  // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'
   sum += sizeof(ptr) / sizeof(ptr[0]);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'
+  // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: suspicious usage of sizeof pointer 'sizeof(T*)/sizeof(T)'
   sum += sizeof(int) * sizeof(char);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious 'sizeof' by 'sizeof' multiplication
+  // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: suspicious 'sizeof' by 'sizeof' multiplication
   sum += sizeof(ptr) * sizeof(ptr[0]);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious 'sizeof' by 'sizeof' multiplication
+  // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: suspicious 'sizeof' by 'sizeof' multiplication
   sum += sizeof(int) * (2 * sizeof(char));
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious 'sizeof' by 'sizeof' multiplication
+  // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: suspicious 'sizeof' by 'sizeof' multiplication
   sum += (2 * sizeof(char)) * sizeof(int);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious 'sizeof' by 'sizeof' multiplication
+  // CHECK-MESSAGES: :[[@LINE-1]]:29: warning: suspicious 'sizeof' by 'sizeof' multiplication
   if (sizeof(A) < 0x100000) sum += 42;
-  // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: suspicious comparison of 'sizeof(expr)' to a constant
+  // CHECK-MESSAGES: :[[@LINE-1]]:17: warning: suspicious comparison of 'sizeof(expr)' to a constant
   if (sizeof(A) <= 0xFFFFFFFEU) sum += 42;
-  // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: suspicious comparison of 'sizeof(expr)' to a constant
+  // CHECK-MESSAGES: :[[@LINE-1]]:17: warning: suspicious comparison of 'sizeof(expr)' to a constant
   return sum;
 }
 
 typedef char MyChar;
 typedef const MyChar MyConstChar;
 
 int CE0 = sizeof sizeof(char);
 // CHECK-MESSAGES: :[[@LINE-1]]:11: warning: suspicious usage of 'sizeof(sizeof(...))'
 int CE1 = sizeof +sizeof(char);
 // CHECK-MESSAGES: :[[@LINE-1]]:11: warning: suspicious usage of 'sizeof(sizeof(...))'
 int CE2 = sizeof sizeof(const char*);
 // CHECK-MESSAGES: :[[@LINE-1]]:11: warning: suspicious usage of 'sizeof(sizeof(...))'
 int CE3 = sizeof sizeof(const volatile char* const*);
 // CHECK-MESSAGES: :[[@LINE-1]]:11: warning: suspicious usage of 'sizeof(sizeof(...))'
 int CE4 = sizeof sizeof(MyConstChar);
 // CHECK-MESSAGES: :[[@LINE-1]]:11: warning: suspicious usage of 'sizeof(sizeof(...))'
 
 int Test2(MyConstChar* A) {
   int sum = 0;
   sum += sizeof(MyConstChar) / sizeof(char);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
+  // CHECK-MESSAGES: :[[@LINE-1]]:30: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
   sum += sizeof(MyConstChar) / sizeof(MyChar);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
+  // CHECK-MESSAGES: :[[@LINE-1]]:30: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
   sum += sizeof(A[0]) / sizeof(char);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
+  // CHECK-MESSAGES: :[[@LINE-1]]:23: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
   return sum;
 }
 
 template <int T>
 int Foo() { int A[T]; return sizeof(T); }
 // CHECK-MESSAGES: :[[@LINE-1]]:30: warning: suspicious usage of 'sizeof(K)'
 template <typename T>
 int Bar() { T A[5]; return sizeof(A[0]) / sizeof(T); }
-// CHECK-MESSAGES: :[[@LINE-1]]:28: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
+// CHECK-MESSAGES: :[[@LINE-1]]:41: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
 int Test3() { return Foo<42>() + Bar<char>(); }
 
 static const char* kABC = "abc";
 static const wchar_t* kDEF = L"def";
 int Test4(const char A[10]) {
   int sum = 0;
   sum += sizeof(kABC);
   // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(char*)'
int Test5() {
   sum += sizeof(&A10);
   // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
   sum += sizeof(PtrArray) / sizeof(PtrArray[1]);
   // CHECK-MESSAGES: :[[@LINE-1]]:29: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
   sum += sizeof(A10) / sizeof(PtrArray[0]);
   // CHECK-MESSAGES: :[[@LINE-1]]:24: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
   sum += sizeof(PC) / sizeof(PtrArray[0]);
   // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
-  // CHECK-MESSAGES: :[[@LINE-2]]:10: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
+  // CHECK-MESSAGES: :[[@LINE-2]]:21: warning: suspicious usage of sizeof pointer 'sizeof(T)/sizeof(T)'
   // CHECK-MESSAGES: :[[@LINE-3]]:23: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
   sum += sizeof(ArrayC) / sizeof(PtrArray[0]);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
+  // CHECK-MESSAGES: :[[@LINE-1]]:25: warning: suspicious usage of 'sizeof(...)/sizeof(...)'; numerator is not a multiple of denominator
   // CHECK-MESSAGES: :[[@LINE-2]]:27: warning: suspicious usage of 'sizeof(A*)'; pointer to aggregate
 
   return sum;
 }
 
 int Test6() {
   int sum = 0;
 
   struct S A = AsStruct(), B = AsStruct();
   struct S *P = &A, *Q = &B;
   sum += sizeof(struct S) == P - Q;
   // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
   sum += 5 * sizeof(S) != P - Q;
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
+  // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
   sum += sizeof(S) < P - Q;
   // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
   sum += 5 * sizeof(S) <= P - Q;
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
+  // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
   sum += 5 * sizeof(*P) >= P - Q;
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
+  // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
   sum += Q - P > 3 * sizeof(*P);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
+  // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
   sum += sizeof(S) + (P - Q);
   // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
   sum += 5 * sizeof(S) - (P - Q);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
+  // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
   sum += (P - Q) / sizeof(S);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
+  // CHECK-MESSAGES: :[[@LINE-1]]:20: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
   sum += (P - Q) / sizeof(*Q);
-  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
+  // CHECK-MESSAGES: :[[@LINE-1]]:20: warning: suspicious usage of 'sizeof(...)' in pointer arithmetic
 
   return sum;
 }
 
 int ValidExpressions() {
   int A[] = {1, 2, 3, 4};
   static const char str[] = "hello";
   static const char* ptr[] { "aaa", "bbb", "ccc" };