Attr: Remove ForceInline

The __forceinline keyword's semantics are now recast as AlwaysInline and
the kw___forceinline token has its language mode set for KEYMS.

This preserves the semantics of the previous implementation but with
less duplication of code.

llvm-svn: 202131
diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp b/clang/lib/CodeGen/CodeGenFunction.cpp
index 409d114..e81b1bc 100644
--- a/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -527,8 +527,7 @@
           Fn->addFnAttr(llvm::Attribute::InlineHint);
           break;
         }
-    } else if (!FD->hasAttr<AlwaysInlineAttr>() &&
-               !FD->hasAttr<ForceInlineAttr>())
+    } else if (!FD->hasAttr<AlwaysInlineAttr>())
       Fn->addFnAttr(llvm::Attribute::NoInline);
   }