On Thu, Aug 31, 2017 at 12:25:42PM -0500, Josh Poimboeuf wrote: > 2) Put "sp" in the clobbers list instead of as an i/o constraint. This > mostly works for GCC, and doesn't break clang. However, it causes > GCC to insert a "lea -0x10(%rbp),%rsp" in the epilogue of every > affected function.
And maybe this extra instruction is negligible for performance and not a big deal? I might look at this one after the holiday too. -- Josh
