8b87edfa68
The mask doesn't really affect the reverse. It only poisons the masked off elements in the results. It should be ok to ignore the mask if we can eliminate the pair. I don't have a specific use case for this, but it matches what I had implemented in our downstream before the current upstream implementation. Submitting upstream so I can remove the delta in my downstream.
80 lines
4.2 KiB
LLVM
80 lines
4.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instsimplify -S | FileCheck %s
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define <vscale x 4 x i32> @rev_of_rev(<vscale x 4 x i32> %a, i32 %evl) {
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; CHECK-LABEL: @rev_of_rev(
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; CHECK-NEXT: ret <vscale x 4 x i32> [[A:%.*]]
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;
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%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)
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%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)
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ret <vscale x 4 x i32> %res
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}
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define <vscale x 4 x i32> @rev_of_rev_diffevl(<vscale x 4 x i32> %a, i32 %evl) {
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; CHECK-LABEL: @rev_of_rev_diffevl(
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; 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:%.*]])
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; 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)
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; CHECK-NEXT: ret <vscale x 4 x i32> [[RES]]
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;
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%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)
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%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)
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ret <vscale x 4 x i32> %res
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}
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define <vscale x 4 x i32> @rev_of_poison(i32 %evl) {
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; CHECK-LABEL: @rev_of_poison(
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; CHECK-NEXT: ret <vscale x 4 x i32> poison
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;
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%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)
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ret <vscale x 4 x i32> %rev
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}
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define <vscale x 4 x i32> @rev_of_undef(i32 %evl) {
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; CHECK-LABEL: @rev_of_undef(
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; CHECK-NEXT: ret <vscale x 4 x i32> undef
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;
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%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)
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ret <vscale x 4 x i32> %rev
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}
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define <vscale x 4 x i32> @rev_of_zero(i32 %evl) {
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; CHECK-LABEL: @rev_of_zero(
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; CHECK-NEXT: ret <vscale x 4 x i32> zeroinitializer
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;
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%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)
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ret <vscale x 4 x i32> %rev
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}
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define <vscale x 4 x i32> @rev_of_splat(i32 %a, i32 %evl) {
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; CHECK-LABEL: @rev_of_splat(
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; CHECK-NEXT: [[A_INS:%.*]] = insertelement <vscale x 4 x i32> poison, i32 [[A:%.*]], i32 0
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; CHECK-NEXT: [[A_VEC:%.*]] = shufflevector <vscale x 4 x i32> [[A_INS]], <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer
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; CHECK-NEXT: ret <vscale x 4 x i32> [[A_VEC]]
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;
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%a.ins = insertelement <vscale x 4 x i32> poison, i32 %a, i32 0
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%a.vec = shufflevector <vscale x 4 x i32> %a.ins, <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer
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%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)
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ret <vscale x 4 x i32> %rev
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}
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define <vscale x 4 x i32> @rev_of_splat2(i32 %a, <vscale x 4 x i1> %m, i32 %evl) {
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; CHECK-LABEL: @rev_of_splat2(
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; CHECK-NEXT: [[A_INS:%.*]] = insertelement <vscale x 4 x i32> poison, i32 [[A:%.*]], i32 0
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; CHECK-NEXT: [[A_VEC:%.*]] = shufflevector <vscale x 4 x i32> [[A_INS]], <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer
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; CHECK-NEXT: ret <vscale x 4 x i32> [[A_VEC]]
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;
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%a.ins = insertelement <vscale x 4 x i32> poison, i32 %a, i32 0
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%a.vec = shufflevector <vscale x 4 x i32> %a.ins, <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer
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%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)
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ret <vscale x 4 x i32> %rev
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}
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define <vscale x 4 x i32> @rev_of_rev_diffmask(<vscale x 4 x i32> %a, <vscale x 4 x i1> %mask1, <vscale x 4 x i1> %mask2, i32 %evl) {
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; CHECK-LABEL: @rev_of_rev_diffmask(
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; CHECK-NEXT: ret <vscale x 4 x i32> [[RES:%.*]]
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;
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%a.rev = tail call <vscale x 4 x i32> @llvm.experimental.vp.reverse(<vscale x 4 x i32> %a, <vscale x 4 x i1> %mask1, i32 %evl)
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%res = tail call <vscale x 4 x i32> @llvm.experimental.vp.reverse(<vscale x 4 x i32> %a.rev, <vscale x 4 x i1> %mask2, i32 %evl)
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ret <vscale x 4 x i32> %res
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}
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