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Commit 01990f0e authored by Chris Lattner's avatar Chris Lattner
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fix PR12075, a regression in a recent transform I added. In unreachable code,... 

fix PR12075, a regression in a recent transform I added.  In unreachable code, gep chains can be infinite.  Just like "stripPointerCasts", use a set to keep track of visited instructions so we don't recurse infinitely.

llvm-svn: 151383
parent 248d65e7
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