http://llvm.org/bugs/show_bug.cgi?id=9527
Summary: warn if class type has alignment greater than "new"
provides and doesn't overload operator new
Product: clang
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Frontend
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
I'd like a new warning that fires whenever a class has alignment that is larger
than that provided by the operator new, and doesn't provide its own operator
new. We could make it -Wobject-alignment=16 and off by default.
Sample:
class Test {
template <typename T>
struct SeparateCacheLines {
T data;
} __attribute__((aligned(64)));
SeparateCacheLines<int> high_contention_data[10];
};
I'd like a warning that fires on class Test, "class Test can not be heap
allocated". It should not fire if operator new is overloaded. It should not
fire on SeparateCacheLines<> itself.
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