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This modifies the pass to classify every SSP-triggering AllocaInst according to an SSPLayoutKind (LargeArray, SmallArray, AddrOf). This analysis is collected by the pass and made available for use, but no other pass uses it yet. The next patch will make use of this analysis in PEI and StackSlot passes. The end goal is to support ssp-strong stack layout rules. WIP. Differential Revision: http://llvm-reviews.chandlerc.com/D1789 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193653 91177308-0d34-0410-b5e6-96231b3b80d8
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