diff options
Diffstat (limited to 'lib/Sema/SemaDeclAttr.cpp')
| -rw-r--r-- | lib/Sema/SemaDeclAttr.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/lib/Sema/SemaDeclAttr.cpp b/lib/Sema/SemaDeclAttr.cpp index 491579c813..29f6cb18a0 100644 --- a/lib/Sema/SemaDeclAttr.cpp +++ b/lib/Sema/SemaDeclAttr.cpp @@ -431,6 +431,27 @@ static void HandleUnusedAttr(Decl *d, const AttributeList &Attr, Sema &S) { d->addAttr(new UnusedAttr()); } +static void HandleUsedAttr(Decl *d, const AttributeList &Attr, Sema &S) { + // check the attribute arguments. + if (Attr.getNumArgs() != 0) { + S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0; + return; + } + + if (const VarDecl *VD = dyn_cast<VarDecl>(d)) { + if (VD->hasLocalStorage()) { + S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "used"; + return; + } + } else if (!isFunctionOrMethod(d)) { + S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type) + << "used" << "variable and function"; + return; + } + + d->addAttr(new UsedAttr()); +} + static void HandleConstructorAttr(Decl *d, const AttributeList &Attr, Sema &S) { // check the attribute arguments. if (Attr.getNumArgs() != 0 && Attr.getNumArgs() != 1) { @@ -1357,6 +1378,7 @@ static void ProcessDeclAttribute(Decl *D, const AttributeList &Attr, Sema &S) { case AttributeList::AT_stdcall: HandleStdCallAttr (D, Attr, S); break; case AttributeList::AT_unavailable: HandleUnavailableAttr(D, Attr, S); break; case AttributeList::AT_unused: HandleUnusedAttr (D, Attr, S); break; + case AttributeList::AT_used: HandleUsedAttr (D, Attr, S); break; case AttributeList::AT_vector_size: HandleVectorSizeAttr(D, Attr, S); break; case AttributeList::AT_visibility: HandleVisibilityAttr(D, Attr, S); break; case AttributeList::AT_weak: HandleWeakAttr (D, Attr, S); break; |