[PATCH] D137547: [AArch64][SVE] Use PTRUE instruction for get_active_lane_mask intrinsic if the range is appropriate for predicator constant

[Dinar Temirbulatov via Phabricator via llvm-commits]

dtemirbulatov marked 7 inline comments as done.
dtemirbulatov added inline comments.


================
Comment at: llvm/test/CodeGen/AArch64/active_lane_mask.ll:495
+entry:
+  %active.lane.mask = call <vscale x 4 x i1> @llvm.get.active.lane.mask.nxv4i1.i64(i64 0, i64 4)
+  ret <vscale x 4 x i1> %active.lane.mask
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c-rhodes wrote:
> active.lane.mask is an unsigned less-than comparison so this generates a predicate with 4 active lanes, which for a minimum vector width of 128 and esize of 32 can be represented with `ptrue p0.s, vl4`?
correct.


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