[Bug target/38239] [4.9, 5, 6 regression] The function mcount in gmon.o changes register ecx

[ro at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38239

--- Comment #3 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 37955
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37955&action=edit
proposed patch