[Bug target/65408] powerpc64 function argument passing may access invalid memory

[amodra at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65408
Bug 65408 depends on bug 36043, which changed state.

Bug 36043 Summary: gcc reads 8 bytes for a struct of size 6 which leads to 
sigsegv
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36043

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