[Bug rtl-optimization/66838] Calling multiple SYSV AMD64 ABI functions from MS x64 ABI one results in clobbered parameters

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66838

--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed for mainline, needs backport to gcc-5 branch.