Add the `pass_object_size` attribute to clang.

`pass_object_size` is our way of enabling `__builtin_object_size` to
produce high quality results without requiring inlining to happen
everywhere.

A link to the design doc for this attribute is available at the
Differential review link below.

Differential Revision: http://reviews.llvm.org/D13263

llvm-svn: 254554

1 files changed, 5 insertions, 2 deletions

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index a15c43c313a..faae080ff8e 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -1830,8 +1830,11 @@ llvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD,
                                                  bool DontDefer,
                                                  bool IsForDefinition) {
   // If there was no specific requested type, just convert it now.
-  if (!Ty)
-    Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType());
+  if (!Ty) {
+    const auto *FD = cast<FunctionDecl>(GD.getDecl());
+    auto CanonTy = Context.getCanonicalType(FD->getType());
+    Ty = getTypes().ConvertFunctionType(CanonTy, FD);
+  }
 
   StringRef MangledName = getMangledName(GD);
   return GetOrCreateLLVMFunction(MangledName, Ty, GD, ForVTable, DontDefer,