Cameron Zwarich d8c120bbd3 Dial back the speculative fix for PR8954 a bit, so that we only recompute dominators
once at the beginning of GVN instead of once per iteration.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123278 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-11 22:14:42 +00:00
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