Bill Wendling b846719663 Ignore unreachable blocks when doing memory dependence analysis on non-local ...

loads. It's not really profitable and may result in GVN going into an infinite
loop when it hits constructs like this:

     %x = gep %some.type %x, ...

Found via an LTO build of LLVM.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166490 91177308-0d34-0410-b5e6-96231b3b80d8

2012-10-23 18:37:11 +00:00

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