Merging r227208:

Merging r227208:

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r227208 | marek.olsak | 2015-01-27 12:24:54 -0500 (Tue, 27 Jan 2015) | 7 lines

R600/SI: Add pseudos for MUBUF loads and stores

This defines the SI versions only, so it shouldn't change anything.

There are no changes other than using the new multiclasses, adding missing
mayLoad/mayStore, and formatting fixes.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_36@233728 91177308-0d34-0410-b5e6-96231b3b80d8