efriedma added inline comments.
================
Comment at: lib/Sema/SemaChecking.cpp:210
+ Arg = S.PerformCopyInitialization(Entity, SourceLocation(), Arg);
+ TheCall->setArg(I, Arg.get());
}
----------------
Can you split this change into a separate patch? Testcase:
```
int a() {
const int x = 3;
static int z;
constexpr int * y = &z;
return []() { return __builtin_sub_overflow(x,x,y); }();
}```
https://reviews.llvm.org/D48040
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