derek.holloway
7502bf64a4
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28 lines
1.4 KiB
LLVM
28 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=instsimplify -S < %s | FileCheck %s
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; Test back to back reverse shuffles are eliminated.
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define <vscale x 4 x i32> @shuffle_b2b_reverse(<vscale x 4 x i32> %a) {
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; CHECK-LABEL: @shuffle_b2b_reverse(
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; CHECK-NEXT: ret <vscale x 4 x i32> [[A:%.*]]
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;
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%rev = tail call <vscale x 4 x i32> @llvm.vector.reverse.nxv4i32(<vscale x 4 x i32> %a)
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%rev.rev = tail call <vscale x 4 x i32> @llvm.vector.reverse.nxv4i32(<vscale x 4 x i32> %rev)
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ret <vscale x 4 x i32> %rev.rev
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}
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; Test reverse of a splat is eliminated.
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define <vscale x 4 x i32> @splat_reverse(i32 %a) {
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; CHECK-LABEL: @splat_reverse(
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; CHECK-NEXT: [[SPLAT_INSERT:%.*]] = insertelement <vscale x 4 x i32> poison, i32 [[A:%.*]], i32 0
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; CHECK-NEXT: [[SPLAT:%.*]] = shufflevector <vscale x 4 x i32> [[SPLAT_INSERT]], <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer
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; CHECK-NEXT: ret <vscale x 4 x i32> [[SPLAT]]
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;
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%splat_insert = insertelement <vscale x 4 x i32> poison, i32 %a, i32 0
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%splat = shufflevector <vscale x 4 x i32> %splat_insert, <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.vector.reverse.nxv4i32(<vscale x 4 x i32> %splat)
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ret <vscale x 4 x i32> %rev
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}
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declare <vscale x 4 x i32> @llvm.vector.reverse.nxv4i32(<vscale x 4 x i32>)
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