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

[hfinkel at anl.gov]

Can you please post this patch with full context; see: http://llvm.org/docs/Phabricator.html#requesting-a-review-via-the-web-interface


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Comment at: /home/seurer/llvm/llvm-test/projects/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.cc:93
@@ +92,3 @@
+  if (FAST_UNWIND_MAY_NEED_TO_POP_FRAMES) {
+    // We possibly need to pop a few frames so that pc is on top.
+    PopStackFramesToPc(pc);
----------------
Please explain why.

http://reviews.llvm.org/D9259

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