Re: [PATCH] Improve -Ofast vectorization of std::sin etc. (PR libstdc++/81706)

[Jason Merrill]

On 09/29/2017 08:32 AM, Jakub Jelinek wrote:
+         tree b = builtin_decl_explicit (DECL_FUNCTION_CODE (newdecl));
+         if (b)
+           duplicate_one_attribute (&DECL_ATTRIBUTES (b),
+                                    DECL_ATTRIBUTES (newdecl),
+                                    "omp declare simd");

It occurs to me that we're likely to want to propagate other attributes 
to the builtin, too.  In the testcase, nothrow and leaf also seem 
appropriate.  Do we want a broader copy_attributes_to_builtin function, 
even if it only copies this omp attribute for now?

Jason