[Bug rtl-optimization/80754] invalid smull instructions generated after r247881

[rearnsha at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80754

Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |rearnsha at gcc dot gnu.org
          Component|target                      |rtl-optimization

--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
I suspect this has just revealed a latent issue.

How can it be right for the register allocator to assign the same register to
*two* different output operands?