forked from OSchip/llvm-project
14d726acd6
The swap removal pass looks to remove swaps when a loaded value is swapped, some number of lane-insensitive operations are performed and then the value is swapped again and stored. However, in a situation where we load the value, swap it and then store it without swapping again, the pass erroneously removes the single swap. The reason is that both checks in the same equivalence class: - load feeds a swap - swap feeds a store pass. However, there is no check that the two swaps are actually a single swap. This patch just fixes that. Differential revision: https://reviews.llvm.org/D84785 |
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