llvm/test/Transforms/InstSimplify/vp-reverse.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instsimplify -S | FileCheck %s

define <vscale x 4 x i32> @rev_of_rev(<vscale x 4 x i32> %a, i32 %evl) {
; CHECK-LABEL: @rev_of_rev(
; CHECK-NEXT:    ret <vscale x 4 x i32> [[A:%.*]]
;
  %a.rev = tail call <vscale x 4 x i32> @llvm.experimental.vp.reverse(<vscale x 4 x i32> %a, <vscale x 4 x i1> splat (i1 true), i32 %evl)
  %res = tail call <vscale x 4 x i32> @llvm.experimental.vp.reverse(<vscale x 4 x i32> %a.rev, <vscale x 4 x i1> splat (i1 true), i32 %evl)
  ret <vscale x 4 x i32> %res
}

define <vscale x 4 x i32> @rev_of_rev_diffevl(<vscale x 4 x i32> %a, i32 %evl) {
; CHECK-LABEL: @rev_of_rev_diffevl(
; CHECK-NEXT:    [[A_REV:%.*]] = tail call <vscale x 4 x i32> @llvm.experimental.vp.reverse.nxv4i32(<vscale x 4 x i32> [[A:%.*]], <vscale x 4 x i1> splat (i1 true), i32 [[EVL:%.*]])
; CHECK-NEXT:    [[RES:%.*]] = tail call <vscale x 4 x i32> @llvm.experimental.vp.reverse.nxv4i32(<vscale x 4 x i32> [[A_REV]], <vscale x 4 x i1> splat (i1 true), i32 10)
; CHECK-NEXT:    ret <vscale x 4 x i32> [[RES]]
;
  %a.rev = tail call <vscale x 4 x i32> @llvm.experimental.vp.reverse(<vscale x 4 x i32> %a, <vscale x 4 x i1> splat (i1 true), i32 %evl)
  %res = tail call <vscale x 4 x i32> @llvm.experimental.vp.reverse(<vscale x 4 x i32> %a.rev, <vscale x 4 x i1> splat (i1 true), i32 10)
  ret <vscale x 4 x i32> %res
}

define <vscale x 4 x i32> @rev_of_poison(i32 %evl) {
; CHECK-LABEL: @rev_of_poison(
; CHECK-NEXT:    ret <vscale x 4 x i32> poison
;
  %rev = tail call <vscale x 4 x i32> @llvm.experimental.vp.reverse(<vscale x 4 x i32> poison, <vscale x 4 x i1> splat (i1 true), i32 %evl)
  ret <vscale x 4 x i32> %rev
}

define <vscale x 4 x i32> @rev_of_undef(i32 %evl) {
; CHECK-LABEL: @rev_of_undef(
; CHECK-NEXT:    ret <vscale x 4 x i32> undef
;
  %rev = tail call <vscale x 4 x i32> @llvm.experimental.vp.reverse(<vscale x 4 x i32> undef, <vscale x 4 x i1> splat (i1 true), i32 %evl)
  ret <vscale x 4 x i32> %rev
}

define <vscale x 4 x i32> @rev_of_zero(i32 %evl) {
; CHECK-LABEL: @rev_of_zero(
; CHECK-NEXT:    ret <vscale x 4 x i32> zeroinitializer
;
  %rev = tail call <vscale x 4 x i32> @llvm.experimental.vp.reverse(<vscale x 4 x i32> zeroinitializer, <vscale x 4 x i1> splat (i1 true), i32 %evl)
  ret <vscale x 4 x i32> %rev
}

define <vscale x 4 x i32> @rev_of_splat(i32 %a, i32 %evl) {
; CHECK-LABEL: @rev_of_splat(
; CHECK-NEXT:    [[A_INS:%.*]] = insertelement <vscale x 4 x i32> poison, i32 [[A:%.*]], i32 0
; CHECK-NEXT:    [[A_VEC:%.*]] = shufflevector <vscale x 4 x i32> [[A_INS]], <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer
; CHECK-NEXT:    ret <vscale x 4 x i32> [[A_VEC]]
;
  %a.ins = insertelement <vscale x 4 x i32> poison, i32 %a, i32 0
  %a.vec = shufflevector <vscale x 4 x i32> %a.ins, <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer
  %rev = tail call <vscale x 4 x i32> @llvm.experimental.vp.reverse(<vscale x 4 x i32> %a.vec, <vscale x 4 x i1> splat (i1 true), i32 %evl)
  ret <vscale x 4 x i32> %rev
}

define <vscale x 4 x i32> @rev_of_splat2(i32 %a, <vscale x 4 x i1> %m, i32 %evl) {
; CHECK-LABEL: @rev_of_splat2(
; CHECK-NEXT:    [[A_INS:%.*]] = insertelement <vscale x 4 x i32> poison, i32 [[A:%.*]], i32 0
; CHECK-NEXT:    [[A_VEC:%.*]] = shufflevector <vscale x 4 x i32> [[A_INS]], <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer
; CHECK-NEXT:    ret <vscale x 4 x i32> [[A_VEC]]
;
  %a.ins = insertelement <vscale x 4 x i32> poison, i32 %a, i32 0
  %a.vec = shufflevector <vscale x 4 x i32> %a.ins, <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer
  %rev = tail call <vscale x 4 x i32> @llvm.experimental.vp.reverse(<vscale x 4 x i32> %a.vec, <vscale x 4 x i1> %m, i32 %evl)
  ret <vscale x 4 x i32> %rev
}