Alina Sbirlea ff8b8aea2e Add MemorySSA as loop dependency, disabled by default [NFC]. ...

Summary:
First step in adding MemorySSA as dependency for loop pass manager.
Adding the dependency under a flag.

New pass manager: MSSA pointer in LoopStandardAnalysisResults can be null.
Legacy and new pass manager: Use cl::opt EnableMSSALoopDependency. Disabled by default.

Reviewers: sanjoy, davide, gberry

Subscribers: mehdi_amini, Prazek, llvm-commits

Differential Revision: https://reviews.llvm.org/D40274

llvm-svn: 318772

2017-11-21 15:45:46 +00:00

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