void DiagnoseAlwaysNonNullPointer(Expr *E,
Expr::NullPointerConstantKind NullType,
bool IsEqual, SourceRange Range);
- void CheckAlwaysNonNullPointer(Expr *OrigExp);
/// type checking for vector binary operators.
QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS,
<< FixItHint::CreateInsertion(getLocForEndOfToken(E->getLocEnd()), "()");
}
-void Sema::CheckAlwaysNonNullPointer(Expr *OrigExpr) {
- if (const UnaryOperator *U = dyn_cast<UnaryOperator>(OrigExpr))
- if (U->getOpcode() == UO_LNot)
- return CheckAlwaysNonNullPointer(U->getSubExpr());
-
- Expr *E = OrigExpr->IgnoreParenImpCasts();
- QualType Source = E->getType();
- if (Source->isPointerType() || Source->canDecayToPointerType())
- DiagnoseAlwaysNonNullPointer(E, Expr::NPCK_NotNull, /*IsEqual*/ false,
- SourceRange());
-}
/// Diagnoses "dangerous" implicit conversions within the given
/// expression (which is a full expression). Implements -Wconversion
if (!LHS.get()->getType()->isScalarType() ||
!RHS.get()->getType()->isScalarType())
return InvalidOperands(Loc, LHS, RHS);
-
- CheckAlwaysNonNullPointer(LHS.get());
- CheckAlwaysNonNullPointer(RHS.get());
-
+
return Context.IntTy;
}
<< T << E->getSourceRange();
return ExprError();
}
- CheckAlwaysNonNullPointer(E);
}
return E;
-// RUN: %clang_cc1 -triple x86_64-apple-darwin -fsyntax-only -verify %s
-// rdar://18716393
-
-extern int a[] __attribute__((weak));
-int b[] = {8,13,21};
-struct {
- int x[10];
-} c;
-const char str[] = "text";
-
-void ignore() {
- if (!a) {}
-}
-void test() {
- if (!b) {} // expected-warning {{address of array 'b' will always evaluate to 'true'}}
- if (b == 0) {} // expected-warning {{comparison of array 'b' equal to a null pointer is always false}}
- if (!c.x) {} // expected-warning {{address of array 'c.x' will always evaluate to 'true'}}
- if (c.x == 0) {} // expected-warning {{comparison of array 'c.x' equal to a null pointer is always false}}
- if (!str) {} // expected-warning {{address of array 'str' will always evaluate to 'true'}}
- if (0 == str) {} // expected-warning {{comparison of array 'str' equal to a null pointer is always false}}
-}
-
-int array[2];
-int test1()
-{
- if (!array) { // expected-warning {{address of array 'array' will always evaluate to 'true'}}
- return array[0];
- } else if (array != 0) { // expected-warning {{comparison of array 'array' not equal to a null pointer is always true}}
- return array[1];
- }
- if (array == 0) // expected-warning {{comparison of array 'array' equal to a null pointer is always false}}
- return 1;
- return 0;
-}
-
-#define NULL (void*)0
-
-int test2(int* pointer, char ch, void * pv) {
- if (!&pointer) { // expected-warning {{address of 'pointer' will always evaluate to 'true'}}
- return 0;
- }
-
- if (&pointer) { // expected-warning {{address of 'pointer' will always evaluate to 'true'}}
- return 0;
- }
-
- if (&pointer == NULL) {} // expected-warning {{comparison of address of 'pointer' equal to a null pointer is always false}}
-
- if (&pointer != NULL) {} // expected-warning {{comparison of address of 'pointer' not equal to a null pointer is always true}}
-
- return 1;
-}
-
-void test3() {
- if (array) { } // expected-warning {{address of array 'array' will always evaluate to 'true'}}
- if (array != 0) {} // expected-warning {{comparison of array 'array' not equal to a null pointer is always true}}
- if (!array) { } // expected-warning {{address of array 'array' will always evaluate to 'true'}}
- if (array == 0) {} // expected-warning {{comparison of array 'array' equal to a null pointer is always false}}
-
- if (array[0] &&
- array) {} // expected-warning {{address of array 'array' will always evaluate to 'true'}}
-
- if (array[0] ||
- array) {} // expected-warning {{address of array 'array' will always evaluate to 'true'}}
-
- if (array[0] &&
- !array) {} // expected-warning {{address of array 'array' will always evaluate to 'true'}}
- if (array[0] ||
- !array) {} // expected-warning {{address of array 'array' will always evaluate to 'true'}}
-
- if (array && // expected-warning {{address of array 'array' will always evaluate to 'true'}}
- array[0]) {}
- if (!array || // expected-warning {{address of array 'array' will always evaluate to 'true'}}
- array[0]) {}
-
- if (array || // expected-warning {{address of array 'array' will always evaluate to 'true'}}
- (!array && array[0])) {} // expected-warning {{address of array 'array' will always evaluate to 'true'}}
- }
-
-