Shuxin Yang 253449db20 PR14904: Segmentation fault running pass 'Recognize loop idioms' ...

The root cause is mistakenly taking for granted that 
    "dyn_cast<Instruction>(a-Value)"
return a non-NULL instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172145 91177308-0d34-0410-b5e6-96231b3b80d8

2013-01-10 23:32:01 +00:00

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