[llvm] [RISCV] Fold vector shift of sext/zext to widening multiply (PR #121563)

[Piotr Fusik via llvm-commits]

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@@ -222,13 +222,6 @@ define <vscale x 2 x i64> @vwsll_vx_i8_nxv2i64_zext(<vscale x 2 x i32> %a, i8 %b
 }
 
 define <vscale x 2 x i64> @vwsll_vi_nxv2i64(<vscale x 2 x i32> %a) {
-; CHECK-LABEL: vwsll_vi_nxv2i64:
-; CHECK:       # %bb.0:
-; CHECK-NEXT:    vsetvli a0, zero, e64, m2, ta, ma
-; CHECK-NEXT:    vzext.vf2 v10, v8
-; CHECK-NEXT:    vsll.vi v8, v10, 2
-; CHECK-NEXT:    ret
-;
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pfusik wrote:

This is same problem as in the `vwsll-vp.ll` file - see my comment there.

https://github.com/llvm/llvm-project/pull/121563