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1485cc2bb3
nodes to emit shuffles and don't do isel mask matching anymore. - Add the selection of the remaining shuffle opcode (movddup) - Introduce two new functions to "recognize" where we may get potential folds and add several comments to them explaining why they are not yet in the desidered shape. - Add more patterns to fallback the case where we select a specific shuffle opcode as if it could fold a load, but it can't, so remap to a valid instruction. - Add a couple of FIXMEs to address in the following days once there's a good solution to the current folding problem. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113369 91177308-0d34-0410-b5e6-96231b3b80d8
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