Merging r322373:

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r322373 | d0k | 2018-01-12 07:03:24 -0800 (Fri, 12 Jan 2018) | 4 lines

[PowerPC] Don't miscompile rotate+mask into an ANDIo if it can't recreate the immediate

I'm not even sure if this transform is ever worth it, but this at least
stops the bleeding.
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llvm-svn: 330082