return false;
} else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
if (!VD->isFileVarDecl() ||
- VD->getType().isConstant(Context) ||
Context.DeclMustBeEmitted(VD))
return false;
+ // If a variable is usable in constant expressions and it's not odr-used,
+ // its value may still have been used. Conservatively suppress the warning
+ // in this case.
+ const VarDecl *VDWithInit = 0;
+ if (VD->isUsableInConstantExpressions(Context) &&
+ VD->getAnyInitializer(VDWithInit) && VDWithInit->checkInitIsICE())
+ return false;
+
if (VD->isStaticDataMember() &&
VD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation)
return false;
-// RUN: %clang_cc1 -fsyntax-only -verify -Wunused -Wunused-member-function %s
+// RUN: %clang_cc1 -fsyntax-only -verify -Wunused -Wunused-member-function -std=c++98 %s
+// RUN: %clang_cc1 -fsyntax-only -verify -Wunused -Wunused-member-function -std=c++11 %s
static void f1(); // expected-warning{{unused}}
foo();
}
}
+
+namespace test5 {
+ static int n = 0;
+ static int &r = n;
+ int f(int &);
+ int k = f(r);
+
+ static const int m = n; // expected-warning {{not needed and will not be emitted}}
+ int x = sizeof(m);
+ static const double d = 0.0; // expected-warning {{not needed and will not be emitted}}
+ int y = sizeof(d);
+}