[PATCH] [PowerPC] Fix __tls_get_addr sequence to avoid register assignment issues

[Bill Schmidt]

OK, I was not aware you had reverted this.  I am going through the pain of re-merging now.  I recommend you have a look at the original diff to see what the changes are, though, as the new diff is going to include all that older code that was reverted and will make it difficult to see what I've changed.


http://reviews.llvm.org/D7491

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