[PATCH] D55382: Make -Wstring-plus-int warns even if when the result is not out of bounds
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Thu Dec 13 08:09:59 PST 2018
This revision was automatically updated to reflect the committed changes.
Closed by commit rL349054: Make -Wstring-plus-int warns even if when the result is not out of bounds (authored by sylvestre, committed by ).
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Repository:
rL LLVM
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D55382/new/
https://reviews.llvm.org/D55382
Files:
cfe/trunk/lib/Sema/SemaExpr.cpp
cfe/trunk/test/SemaCXX/string-plus-int.cpp
Index: cfe/trunk/lib/Sema/SemaExpr.cpp
===================================================================
--- cfe/trunk/lib/Sema/SemaExpr.cpp
+++ cfe/trunk/lib/Sema/SemaExpr.cpp
@@ -9135,16 +9135,6 @@
if (!IsStringPlusInt || IndexExpr->isValueDependent())
return;
- Expr::EvalResult Result;
- if (IndexExpr->EvaluateAsInt(Result, Self.getASTContext())) {
- llvm::APSInt index = Result.Val.getInt();
- unsigned StrLenWithNull = StrExpr->getLength() + 1;
- if (index.isNonNegative() &&
- index <= llvm::APSInt(llvm::APInt(index.getBitWidth(), StrLenWithNull),
- index.isUnsigned()))
- return;
- }
-
SourceRange DiagRange(LHSExpr->getBeginLoc(), RHSExpr->getEndLoc());
Self.Diag(OpLoc, diag::warn_string_plus_int)
<< DiagRange << IndexExpr->IgnoreImpCasts()->getType();
Index: cfe/trunk/test/SemaCXX/string-plus-int.cpp
===================================================================
--- cfe/trunk/test/SemaCXX/string-plus-int.cpp
+++ cfe/trunk/test/SemaCXX/string-plus-int.cpp
@@ -31,37 +31,36 @@
consume("foo" + 5); // expected-warning {{adding 'int' to a string does not append to the string}} expected-note {{use array indexing to silence this warning}}
consume("foo" + index); // expected-warning {{adding 'int' to a string does not append to the string}} expected-note {{use array indexing to silence this warning}}
consume("foo" + kMyEnum); // expected-warning {{adding 'MyEnum' to a string does not append to the string}} expected-note {{use array indexing to silence this warning}}
+ consume("foo" + kMySmallEnum); // expected-warning {{adding 'MyEnum' to a string does not append to the string}} expected-note {{use array indexing to silence this warning}}
consume(5 + "foo"); // expected-warning {{adding 'int' to a string does not append to the string}} expected-note {{use array indexing to silence this warning}}
consume(index + "foo"); // expected-warning {{adding 'int' to a string does not append to the string}} expected-note {{use array indexing to silence this warning}}
consume(kMyEnum + "foo"); // expected-warning {{adding 'MyEnum' to a string does not append to the string}} expected-note {{use array indexing to silence this warning}}
+ consume(kMySmallEnum + "foo"); // expected-warning {{adding 'MyEnum' to a string does not append to the string}} expected-note {{use array indexing to silence this warning}}
// FIXME: suggest replacing with "foo"[5]
consumeChar(*("foo" + 5)); // expected-warning {{adding 'int' to a string does not append to the string}} expected-note {{use array indexing to silence this warning}}
consumeChar(*(5 + "foo")); // expected-warning {{adding 'int' to a string does not append to the string}} expected-note {{use array indexing to silence this warning}}
consume(L"foo" + 5); // expected-warning {{adding 'int' to a string does not append to the string}} expected-note {{use array indexing to silence this warning}}
+ consume(L"foo" + 2); // expected-warning {{adding 'int' to a string does not append to the string}} expected-note {{use array indexing to silence this warning}}
+
+ consume("foo" + 3); // expected-warning {{adding 'int' to a string does not append to the string}} expected-note {{use array indexing to silence this warning}}
+ consume("foo" + 4); // expected-warning {{adding 'int' to a string does not append to the string}} expected-note {{use array indexing to silence this warning}}
+ consume("\pfoo" + 4); // expected-warning {{adding 'int' to a string does not append to the string}} expected-note {{use array indexing to silence this warning}}
+
+ #define A "foo"
+ #define B "bar"
+ consume(A B + sizeof(A) - 1); // expected-warning {{to a string does not append to the string}} expected-note {{use array indexing to silence this warning}}
// Should not warn.
consume(&("foo"[3]));
consume(&("foo"[index]));
consume(&("foo"[kMyEnum]));
- consume("foo" + kMySmallEnum);
- consume(kMySmallEnum + "foo");
- consume(L"foo" + 2);
-
- consume("foo" + 3); // Points at the \0
- consume("foo" + 4); // Points 1 past the \0, which is legal too.
- consume("\pfoo" + 4); // Pascal strings don't have a trailing \0, but they
- // have a leading length byte, so this is fine too.
consume("foo" + kMyOperatorOverloadedEnum);
consume(kMyOperatorOverloadedEnum + "foo");
-
- #define A "foo"
- #define B "bar"
- consume(A B + sizeof(A) - 1);
}
template <typename T>
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