Modify some deleted function methods to better reflect reality:

 - New isDefined() function checks for deletedness
 - isThisDeclarationADefinition checks for deletedness
 - New doesThisDeclarationHaveABody() does what
   isThisDeclarationADefinition() used to do
 - The IsDeleted bit is not propagated across redeclarations
 - isDeleted() now checks the canoncial declaration
 - New isDeletedAsWritten() does what it says on the tin.
 - isUserProvided() now correct (thanks Richard!)

This fixes the bug that we weren't catching

void foo() = delete;
void foo() {}

as being a redefinition.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@131013 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 9 deletions

diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index 0bf984d40a..46b38e165d 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -938,7 +938,7 @@ static void RemoveUsingDecls(LookupResult &R) {
 static bool IsDisallowedCopyOrAssign(const CXXMethodDecl *D) {
   // FIXME: Should check for private access too but access is set after we get
   // the decl here.
-  if (D->isThisDeclarationADefinition())
+  if (D->doesThisDeclarationHaveABody())
     return false;
 
   if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D))
@@ -973,10 +973,9 @@ bool Sema::ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const {
         return false;
     }
 
-    if (FD->isThisDeclarationADefinition() &&
+    if (FD->doesThisDeclarationHaveABody() &&
         Context.DeclMustBeEmitted(FD))
       return false;
-
   } else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
     if (!VD->isFileVarDecl() ||
         VD->getType().isConstant(Context) ||
@@ -1907,10 +1906,6 @@ bool Sema::MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old) {
   if (Old->isPure())
     New->setPure();
 
-  // Merge the "deleted" flag.
-  if (Old->isDeleted())
-    New->setDeleted();
-
   // Merge attributes from the parameters.  These can mismatch with K&R
   // declarations.
   if (New->getNumParams() == Old->getNumParams())
@@ -4723,7 +4718,7 @@ Sema::ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC,
   if (Redeclaration && Previous.isSingleResult()) {
     const FunctionDecl *Def;
     FunctionDecl *PrevFD = dyn_cast<FunctionDecl>(Previous.getFoundDecl());
-    if (PrevFD && PrevFD->hasBody(Def) && D.hasAttributes()) {
+    if (PrevFD && PrevFD->isDefined(Def) && D.hasAttributes()) {
       Diag(NewFD->getLocation(), diag::warn_attribute_precede_definition);
       Diag(Def->getLocation(), diag::note_previous_definition);
     }
@@ -6118,7 +6113,7 @@ void Sema::CheckForFunctionRedefinition(FunctionDecl *FD) {
   // Don't complain if we're in GNU89 mode and the previous definition
   // was an extern inline function.
   const FunctionDecl *Definition;
-  if (FD->hasBody(Definition) &&
+  if (FD->isDefined(Definition) &&
       !canRedefineFunction(Definition, getLangOptions())) {
     if (getLangOptions().GNUMode && Definition->isInlineSpecified() &&
         Definition->getStorageClass() == SC_Extern)