[Bug target/41089] [4.8/4.9/5/6 Regression] stdarg pass produces wrong code

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=41089
Bug 41089 depends on bug 64950, which changed state.

Bug 64950 Summary: postpone expanding va_arg till pass_stdarg
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64950

           What    |Removed                     |Added
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             Status|REOPENED                    |RESOLVED
         Resolution|---                         |FIXED