Merging r329852:

Merging r329852:

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r329852 | nemanjai | 2018-04-11 14:25:44 -0700 (Wed, 11 Apr 2018) | 8 lines

[PowerPC] Fix condition for 64-bit rotate when replacing r+r instr with r+i

This patch fixes https://bugs.llvm.org/show_bug.cgi?id=37039
The condition only covers one of the two 64-bit rotate instructions. This just
adds the second (RLDICLo).

Patch by Josh Stone.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_60@330076 91177308-0d34-0410-b5e6-96231b3b80d8