[PATCH] D9259: [PowerPC]Adapt fast stack unwinding to work for Power.

[Bill Schmidt]

wschmidt added a comment.

Thus I can fix this by making the following changes to Bill Seurer's patch:

- Remove changes involving stack popping;
- Remove the kFastUnwindAddPC change; and
- Change calculation of pc1 as follows:

  #ifdef __powerpc__
       uhwptr *caller_frame = (uhwptr*)frame[0];
       if (!IsValidFrame((uptr)caller_frame, stack_top, bottom))
         break;
       uhwptr pc1 = caller_frame[kOffsetToPcInFrame];
   #else
       uhwptr pc1 = frame[kOffsetToPcInFrame];
   #endif




http://reviews.llvm.org/D9259