diff options
| author | Daniel Dunbar <daniel@zuster.org> | 2009-02-13 19:23:53 +0000 |
|---|---|---|
| committer | Daniel Dunbar <daniel@zuster.org> | 2009-02-13 19:23:53 +0000 |
| commit | b805dad4aa386aeae0f72512895bd238678d37a5 (patch) | |
| tree | e6ae8592145faec621c6f7efdb24d317acaa3d99 /lib | |
| parent | a4b44dd9d30929a35c44d85102e5241ee847b2f2 (diff) | |
Sema/AST support for attribute used. Patch by Anders Johnson (with small tweaks & test case)!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64478 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Parse/AttributeList.cpp | 1 | ||||
| -rw-r--r-- | lib/Sema/SemaDeclAttr.cpp | 22 |
2 files changed, 23 insertions, 0 deletions
diff --git a/lib/Parse/AttributeList.cpp b/lib/Parse/AttributeList.cpp index 7f18a2c325..56fd916607 100644 --- a/lib/Parse/AttributeList.cpp +++ b/lib/Parse/AttributeList.cpp @@ -56,6 +56,7 @@ AttributeList::Kind AttributeList::getKind(const IdentifierInfo *Name) { if (!memcmp(Str, "weak", 4)) return AT_weak; if (!memcmp(Str, "pure", 4)) return AT_pure; if (!memcmp(Str, "mode", 4)) return AT_mode; + if (!memcmp(Str, "used", 4)) return AT_used; break; case 5: if (!memcmp(Str, "alias", 5)) return AT_alias; 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; |