From: Douglas Gregor <dgregor@apple.com>
Date: Tue, 9 Nov 2010 14:57:47 +0000 (+0000)
Subject: Make #pragma unused work for static local variables.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=268f89e02de7bddbc9d7d7a147a3003bd81cf0d7;p=clang

Make #pragma unused work for static local variables.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@118500 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Sema/SemaAttr.cpp b/lib/Sema/SemaAttr.cpp
index d7290c3089..02b8289022 100644
--- a/lib/Sema/SemaAttr.cpp
+++ b/lib/Sema/SemaAttr.cpp
@@ -282,7 +282,7 @@ void Sema::ActOnPragmaUnused(const Token *Identifiers, unsigned NumIdentifiers,
     }
 
     VarDecl *VD = Lookup.getAsSingle<VarDecl>();
-    if (!VD || !VD->hasLocalStorage()) {
+    if (!VD || !(VD->hasLocalStorage() || VD->isStaticLocal())) {
       Diag(PragmaLoc, diag::warn_pragma_unused_expected_localvar)
         << Name << SourceRange(Tok.getLocation());
       continue;
diff --git a/test/SemaCXX/warn-unused-variables.cpp b/test/SemaCXX/warn-unused-variables.cpp
index 6992cdcd09..8ae7d6ace4 100644
--- a/test/SemaCXX/warn-unused-variables.cpp
+++ b/test/SemaCXX/warn-unused-variables.cpp
@@ -59,3 +59,9 @@ namespace PR6948 {
     X<char> str (read_from_file()); // expected-error{{use of undeclared identifier 'read_from_file'}}
   }
 }
+
+void unused_local_static() {
+  static int x = 0;
+  static int y = 0; // expected-warning{{unused variable 'y'}}
+#pragma unused(x)
+}