Merging r226584:

Merging r226584:

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r226584 | thomas.stellard | 2015-01-20 12:49:43 -0500 (Tue, 20 Jan 2015) | 6 lines

R600/SI: Don't store scratch buffer frame index in MUBUF offset field

We don't have a good way of legalizing this if the frame index offset
is more than the 12-bits, which is size of MUBUF's offset field, so
now we store the frame index in the vaddr field.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_36@226723 91177308-0d34-0410-b5e6-96231b3b80d8