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6418278e7d
Currently, a load from an alloca that is used in as single block and is not preceded by a store is replaced by undef. This is not always correct if the single block is inside a loop. Fix the logic so that: 1) If there are no stores in the block, replace the load with an undef, as before. 2) If there is a store (regardless of where it is in the block w.r.t the load), bail out, and let the rest of mem2reg handle this alloca. Patch by: gil.rapaport@intel.com Differential Revision: http://reviews.llvm.org/D11355 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242884 91177308-0d34-0410-b5e6-96231b3b80d8