llvm-project

17df9980 - [RISCV] Canonicalize mask-producing SETCC for easier conversion on the consuming instruction to be VL-predicate (#214877)

[RISCV] Canonicalize mask-producing SETCC for easier conversion on the consuming instruction to be VL-predicate (#214877) Split out from #214350 . This patch canonicalizes ``` %b = splat %base %s = <%offset, %offset + 1, %offset + 2, %offset + 3, ...> %a = add nuw %b, %s %N = splat %n %p = setcc ult %a, %N ``` into ``` %s = <0, 1, 2, 3, ...> %m = sub %n, min(%n, %base + %offset) %M = splat %m %p = setcc ult %s, %M ``` so that if `%p` is later used by masked operations like `masked.load`, we can easily convert the latter to using VL-predicate rather than using mask.