[PATCH] [PowerPC]Adapt fast stack unwinding to work for Power.

[Alexey Samsonov]

I'll let Evgeniy comment on that, but I feel that we shouldn't add a crutch here. Unwinder functionality is essential for ASan usability, so it's better to keep the problems we're aware of visible until we have a good understanding of their root causes.


http://reviews.llvm.org/D9259

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