Revert 111026 & 111027, build breakage.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@111036 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 53 deletions

diff --git a/lib/Sema/Sema.cpp b/lib/Sema/Sema.cpp
index df9bb07cf9..f5c85ad99c 100644
--- a/lib/Sema/Sema.cpp
+++ b/lib/Sema/Sema.cpp
@@ -235,42 +235,6 @@ void Sema::DeleteExpr(ExprTy *E) {
 void Sema::DeleteStmt(StmtTy *S) {
 }
 
-/// \brief Used to prune the decls of Sema's UnusedFileScopedDecls vector.
-static bool ShouldRemoveFromUnused(Sema *SemaRef, const DeclaratorDecl *D) {
-  if (D->isUsed())
-    return true;
-
-  if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
-    // UnusedFileScopedDecls stores the first declaration.
-    // The declaration may have become definition so check again.
-    const FunctionDecl *DeclToCheck;
-    if (FD->hasBody(DeclToCheck))
-      return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
-
-    // Later redecls may add new information resulting in not having to warn,
-    // so check again.
-    DeclToCheck = FD->getMostRecentDeclaration();
-    if (DeclToCheck != FD)
-      return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
-  }
-
-  if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
-    // UnusedFileScopedDecls stores the first declaration.
-    // The declaration may have become definition so check again.
-    const VarDecl *DeclToCheck = VD->getDefinition(); 
-    if (DeclToCheck)
-      return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
-
-    // Later redecls may add new information resulting in not having to warn,
-    // so check again.
-    DeclToCheck = VD->getMostRecentDeclaration();
-    if (DeclToCheck != VD)
-      return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
-  }
-
-  return false;
-}
-
 /// ActOnEndOfTranslationUnit - This is called at the very end of the
 /// translation unit when EOF is reached and all but the top-level scope is
 /// popped.
@@ -299,10 +263,10 @@ void Sema::ActOnEndOfTranslationUnit() {
     }
   
   // Remove file scoped decls that turned out to be used.
-  UnusedFileScopedDecls.erase(std::remove_if(UnusedFileScopedDecls.begin(),
-                                             UnusedFileScopedDecls.end(),
-                              std::bind1st(std::ptr_fun(ShouldRemoveFromUnused),
-                                           this)),
+  UnusedFileScopedDecls.erase(std::remove_if(UnusedFileScopedDecls.begin(), 
+                                             UnusedFileScopedDecls.end(), 
+                             std::bind2nd(std::mem_fun(&DeclaratorDecl::isUsed),
+                                          true)), 
                               UnusedFileScopedDecls.end());
 
   if (!CompleteTranslationUnit)
@@ -370,19 +334,11 @@ void Sema::ActOnEndOfTranslationUnit() {
   for (std::vector<const DeclaratorDecl*>::iterator
          I = UnusedFileScopedDecls.begin(),
          E = UnusedFileScopedDecls.end(); I != E; ++I) {
-    if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I)) {
-      const FunctionDecl *DiagD;
-      if (!FD->hasBody(DiagD))
-        DiagD = FD;
-      Diag(DiagD->getLocation(), diag::warn_unused_function)
-            << DiagD->getDeclName();
-    } else {
-      const VarDecl *DiagD = cast<VarDecl>(*I)->getDefinition();
-      if (!DiagD)
-        DiagD = cast<VarDecl>(*I);
-      Diag(DiagD->getLocation(), diag::warn_unused_variable)
-            << DiagD->getDeclName();
-    }
+    if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I))
+      Diag(FD->getLocation(), diag::warn_unused_function) << FD->getDeclName();
+    else
+      Diag((*I)->getLocation(), diag::warn_unused_variable)
+            << cast<VarDecl>(*I)->getDeclName();
   }
 }