[llvm] [VPlan] Replace ExtractLast(Elem|LanePerPart) with ExtractLast(Lane/Part) (PR #164124)

[via llvm-commits]

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@@ -137,18 +137,18 @@ define i16 @for_phi_removed(ptr  %src) {
 ; UNROLL-NO-IC-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i32> poison, i32 [[TMP0]], i64 0
 ; UNROLL-NO-IC-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i32> [[BROADCAST_SPLATINSERT]], <4 x i32> poison, <4 x i32> zeroinitializer
 ; UNROLL-NO-IC-NEXT:    [[TMP1:%.*]] = icmp eq <4 x i32> [[BROADCAST_SPLAT]], zeroinitializer
-; UNROLL-NO-IC-NEXT:    [[TMP2:%.*]] = select <4 x i1> [[TMP1]], <4 x i16> splat (i16 1), <4 x i16> zeroinitializer
+; UNROLL-NO-IC-NEXT:    [[TMP2:%.*]] = extractelement <4 x i1> [[TMP1]], i32 0
+; UNROLL-NO-IC-NEXT:    [[TMP4:%.*]] = select i1 [[TMP2]], i16 1, i16 0
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ayalz wrote:

(TODO?)

https://github.com/llvm/llvm-project/pull/164124