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15f7119c5e
insertUse, moveBefore and moveAfter operations. Summary: This creates a basic MemorySSA updater that handles arbitrary insertion of uses and defs into MemorySSA, as well as arbitrary movement around the CFG. It replaces the current splice API. It can be made to handle arbitrary control flow changes. Currently, it uses the same updater algorithm from D28934. The main difference is because MemorySSA is single variable, we have the complete def and use list, and don't need anyone to give it to us as part of the API. We also have to rename stores below us in some cases. If we go that direction in that patch, i will merge all the updater implementations (using an updater_traits or something to provide the get* functions we use, called read*/write* in that patch). Sadly, the current SSAUpdater algorithm is way too slow to use for what we are doing here. I have updated the tests we have to basically build memoryssa incrementally using the updater api, and make sure it still comes out the same. Reviewers: george.burgess.iv Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D29047 llvm-svn: 293356 |
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