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When marking derived classes' virtual methods ODR-used in order to trigger 

instantiation in order to permit devirtualization later in codegen, skip over
pure functions since those can't be devirtualization targets.

llvm-svn: 175116
This commit is contained in:
Nick Lewycky 2013-02-14 00:55:17 +00:00
parent 3cfba5bf13
commit b7444cd11e
2 changed files with 18 additions and 1 deletions
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2
clang/lib/Sema/SemaExpr.cpp
View File

@ -11179,7 +11179,7 @@ static void MarkExprReferenced(Sema &SemaRef, SourceLocation Loc,
if (!MostDerivedClassDecl)
return;
CXXMethodDecl *DM = MD->getCorrespondingMethodInClass(MostDerivedClassDecl);
if (!DM)
if (!DM || DM->isPure())
return;
SemaRef.MarkAnyDeclReferenced(Loc, DM, OdrUse);
}

17
clang/test/SemaCXX/undefined-internal.cpp
View File

@ -306,3 +306,20 @@ namespace test12 {
Cls2 obj1((T7())); // expected-note {{used here}}
}
}
namespace test13 {
namespace {
struct X {
virtual void f() { }
};
struct Y : public X {
virtual void f() = 0;
virtual void g() {
X::f();
}
};
}
}