[Bug target/65010] ppc backend generates unnecessary signed extension

[law at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65010

Jeffrey A. Law <law at redhat dot com> changed:

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                 CC|                            |law at redhat dot com

--- Comment #2 from Jeffrey A. Law <law at redhat dot com> ---
Martin, could you attach the .optimized dump for this test.

-fdump-tree-optimized-blocks

That's usually the first place I start as it'll tell me if we're likely going
to need to look at the gimple/ssa optimizers or the rtl optimizers.