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Alina Sbirlea
a7a3e6435d
Summary: Enabling MemorySSA in the old pass manager leads to MemorySSA being run twice due to the fact that LCSSA and LoopSimplify do not preserve MemorySSA. This is the first step to address that: target LCSSA. LCSSA does not make any changes that invalidate MemorySSA, so it preserves it by design. It must preserve AA as well, for this to hold. After this patch, MemorySSA is still run twice in the old pass manager. Step two follows: target LoopSimplify. Subscribers: mehdi_amini, jlebar, Prazek, llvm-commits, george.burgess.iv, chandlerc Tags: #llvm Differential Revision: https://reviews.llvm.org/D60832 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@359032 91177308-0d34-0410-b5e6-96231b3b80d8
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