[Bug target/49526] extra move instruction for smmul

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49526
Bug 49526 depends on bug 68536, which changed state.

Bug 68536 Summary: LRA ICEs with new arm pattern
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68536

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