Implicitly define a lambda's conversion functions (to function

pointers and block pointers). We use dummy definitions to keep the
invariant that an implicit, used definition has a body; IR generation
will substitute the actual contents, since they can't be represented
as C++. 

For the block pointer case, compute the copy-initialization needed to
capture the lambda object in the block, which IR generation will need
later.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150645 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 1 deletions

diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index b05f4d5623..7fee518d2c 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -9447,6 +9447,13 @@ void Sema::MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func) {
         else
           DefineImplicitMoveAssignment(Loc, MethodDecl);
       }
+    } else if (isa<CXXConversionDecl>(MethodDecl) &&
+               MethodDecl->getParent()->isLambda()) {
+      CXXConversionDecl *Conversion = cast<CXXConversionDecl>(MethodDecl);
+      if (Conversion->isLambdaToBlockPointerConversion())
+        DefineImplicitLambdaToBlockPointerConversion(Loc, Conversion);
+      else
+        DefineImplicitLambdaToFunctionPointerConversion(Loc, Conversion);
     } else if (MethodDecl->isVirtual())
       MarkVTableUsed(Loc, MethodDecl->getParent());
   }
@@ -10041,7 +10048,7 @@ static void MarkExprReferenced(Sema &SemaRef, SourceLocation Loc,
   }
 
   SemaRef.MarkAnyDeclReferenced(Loc, D);
-}
+} 
 
 /// \brief Perform reference-marking and odr-use handling for a
 /// BlockDeclRefExpr.