PR11851 (and duplicates): Whenever a constexpr function is referenced,

instantiate it if it can be instantiated and implicitly define it if it can be
implicitly defined. This matches g++'s approach. Remove some cases from
SemaOverload which were marking functions as referenced when just planning how
overload resolution would proceed; such cases are not actually references.

llvm-svn: 167514

1 files changed, 0 insertions, 9 deletions

diff --git a/clang/lib/Sema/SemaOverload.cpp b/clang/lib/Sema/SemaOverload.cpp
index a080031cdc9..8e8580d7019 100644
--- a/clang/lib/Sema/SemaOverload.cpp
+++ b/clang/lib/Sema/SemaOverload.cpp
@@ -2923,8 +2923,6 @@ IsInitializerListConstructorConversion(Sema &S, Expr *From, QualType ToType,
   case OR_Success: {
     // Record the standard conversion we used and the conversion function.
     CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(Best->Function);
-    S.MarkFunctionReferenced(From->getLocStart(), Constructor);
-
     QualType ThisType = Constructor->getThisType(S.Context);
     // Initializer lists don't have conversions as such.
     User.Before.setAsIdentityConversion();
@@ -3105,8 +3103,6 @@ IsUserDefinedConversion(Sema &S, Expr *From, QualType ToType,
     // Record the standard conversion we used and the conversion function.
     if (CXXConstructorDecl *Constructor
           = dyn_cast<CXXConstructorDecl>(Best->Function)) {
-      S.MarkFunctionReferenced(From->getLocStart(), Constructor);
-
       // C++ [over.ics.user]p1:
       //   If the user-defined conversion is specified by a
       //   constructor (12.3.1), the initial standard conversion
@@ -3135,8 +3131,6 @@ IsUserDefinedConversion(Sema &S, Expr *From, QualType ToType,
     }
     if (CXXConversionDecl *Conversion
                  = dyn_cast<CXXConversionDecl>(Best->Function)) {
-      S.MarkFunctionReferenced(From->getLocStart(), Conversion);
-
       // C++ [over.ics.user]p1:
       //
       //   [...] If the user-defined conversion is specified by a
@@ -4049,8 +4043,6 @@ FindConversionForRefInit(Sema &S, ImplicitConversionSequence &ICS,
     if (!Best->FinalConversion.DirectBinding)
       return false;
 
-    if (Best->Function)
-      S.MarkFunctionReferenced(DeclLoc, Best->Function);
     ICS.setUserDefined();
     ICS.UserDefined.Before = Best->Conversions[0].Standard;
     ICS.UserDefined.After = Best->FinalConversion;
@@ -9225,7 +9217,6 @@ Sema::ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr,
     Fn = Resolver.getMatchingFunctionDecl();
     assert(Fn);
     FoundResult = *Resolver.getMatchingFunctionAccessPair();
-    MarkFunctionReferenced(AddressOfExpr->getLocStart(), Fn);
     if (Complain)
       CheckAddressOfMemberAccess(AddressOfExpr, FoundResult);
   }