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9ed3d57a44
This is a replacement for D101938 for inserting vsetvli instructions where needed. This new version changes how we track the information in such a way that we can extend it to be aware of VL/VTYPE changes in other blocks. Given how much it changes the previous patch, I've decided to abandon the previous patch and post this from scratch. For now the pass consists of a single phase that assumes the incoming state from other basic blocks is unknown. A follow up patch will extend this with a phase to collect information about how VL/VTYPE change in each block and a second phase to propagate this information to the entire function. This will be used by a third phase to do the vsetvli insertion. Reviewed By: frasercrmck Differential Revision: https://reviews.llvm.org/D102737 |
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