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This patch adds a first VPlan-based implementation of sinking of scalar operands. The current version traverse a VPlan once and processes all operands of a predicated REPLICATE recipe. If one of those operands can be sunk, it is moved to the block containing the predicated REPLICATE recipe. Continue with processing the operands of the sunk recipe. The initial version does not re-process candidates after other recipes have been sunk. It also cannot partially sink induction increments at the moment. The VPlan only contains WIDEN-INDUCTION recipes and if the induction is used for example in a GEP, only the first lane is used and in the lowered IR the adds for the other lanes can be sunk into the predicated blocks. Reviewed By: Ayal Differential Revision: https://reviews.llvm.org/D100258 |
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