http://llvm.org/bugs/show_bug.cgi?id=12005
Bug #: 12005
Summary: explicit instantiation doesn't emit variable is
non-ODR-used earlier
Product: clang
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: C++
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected],
[email protected]
Classification: Unclassified
This testcase demonstrates a problem:
void f(int);
template <typename T>
struct A {
void g() { f(k); }
static const int k;
};
template <typename T> const int A<T>::k = -1;
template struct A<int>;
where we fail to emit 'A<int>::k' because it was used -- but not ODR-used --
earlier in the body of g.
nlewycky@ducttape:~$ g++ x.cc -c; nm x.o
U _Z1fi
0000000000000000 W _ZN1AIiE1gEv
0000000000000000 V _ZN1AIiE1kE
U __gxx_personality_v0
nlewycky@ducttape:~$ llvm/Debug+Asserts/bin/clang++ x.cc -c; nm x.o
U _Z1fi
0000000000000000 W _ZN1AIiE1gEv
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