[Bug rtl-optimization/65304] [4.9] [ARM] incorrect "asm operand has impossible constraints" error

[cbaylis at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65304

--- Comment #1 from cbaylis at gcc dot gnu.org ---
Created attachment 34941
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34941&action=edit
automatically reduced test case