From: Chris Lattner <sabre@nondot.org>
Date: Fri, 9 Apr 2010 17:25:05 +0000 (+0000)
Subject: Don't warn about unused static functions if they are marked with
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=1a4221cbe1912421ed7e29d0bbac39e9792af8a2;p=clang

Don't warn about unused static functions if they are marked with
attr constructor or destructor.  Patch by Jean-Daniel Dupas!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@100870 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index 9d0d7ad133..7475ae4fbe 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -3318,7 +3318,9 @@ Sema::ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC,
   // FIXME: Also include static functions declared but not defined.
   if (!NewFD->isInvalidDecl() && IsFunctionDefinition 
       && !NewFD->isInlined() && NewFD->getLinkage() == InternalLinkage
-      && !NewFD->isUsed() && !NewFD->hasAttr<UnusedAttr>())
+      && !NewFD->isUsed() && !NewFD->hasAttr<UnusedAttr>()
+      && !NewFD->hasAttr<ConstructorAttr>()
+      && !NewFD->hasAttr<DestructorAttr>())
     UnusedStaticFuncs.push_back(NewFD);
   
   return NewFD;
diff --git a/test/Sema/warn-unused-function.c b/test/Sema/warn-unused-function.c
index 095532bcde..d5e676b116 100644
--- a/test/Sema/warn-unused-function.c
+++ b/test/Sema/warn-unused-function.c
@@ -30,3 +30,8 @@ static void f7(void) {}
 __attribute__((unused)) static void bar(void);
 void bar(void) { }
 
+__attribute__((constructor)) static void bar2(void);
+void bar2(void) { }
+
+__attribute__((destructor)) static void bar3(void);
+void bar3(void) { }