[Bug rtl-optimization/47582] Combine chains of movl into movq

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47582
Bug 47582 depends on bug 23684, which changed state.

Bug 23684 Summary: Combine stores for non strict alignment targets
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=23684

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