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69d2b2aa5a
Sequences of insertelement/extractelements are sometimes used to build vectorsr; this code tries to put them back together into shuffles, but could only produce a completely uniform shuffle types (<N x T> from two <N x T> sources). This should allow shuffles with different numbers of elements on the input and output sides as well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203229 91177308-0d34-0410-b5e6-96231b3b80d8
38 lines
1.2 KiB
LLVM
38 lines
1.2 KiB
LLVM
; RUN: opt -S -instcombine %s | FileCheck %s
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define <1 x i8> @test1(<8 x i8> %in) {
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; CHECK-LABEL: @test1
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; CHECK: shufflevector <8 x i8> %in, <8 x i8> undef, <1 x i32> <i32 5>
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%val = extractelement <8 x i8> %in, i32 5
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%vec = insertelement <1 x i8> undef, i8 %val, i32 0
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ret <1 x i8> %vec
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}
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define <4 x i16> @test2(<8 x i16> %in, <8 x i16> %in2) {
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; CHECK-LABEL: @test2
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; CHECK: shufflevector <8 x i16> %in2, <8 x i16> %in, <4 x i32> <i32 11, i32 9, i32 0, i32 10>
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%elt0 = extractelement <8 x i16> %in, i32 3
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%elt1 = extractelement <8 x i16> %in, i32 1
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%elt2 = extractelement <8 x i16> %in2, i32 0
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%elt3 = extractelement <8 x i16> %in, i32 2
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%vec.0 = insertelement <4 x i16> undef, i16 %elt0, i32 0
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%vec.1 = insertelement <4 x i16> %vec.0, i16 %elt1, i32 1
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%vec.2 = insertelement <4 x i16> %vec.1, i16 %elt2, i32 2
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%vec.3 = insertelement <4 x i16> %vec.2, i16 %elt3, i32 3
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ret <4 x i16> %vec.3
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}
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define <2 x i64> @test_vcopyq_lane_p64(<2 x i64> %a, <1 x i64> %b) #0 {
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; CHECK-LABEL: @test_vcopyq_lane_p64
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; CHECK: extractelement
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; CHECK: insertelement
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; CHECK-NOT: shufflevector
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entry:
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%elt = extractelement <1 x i64> %b, i32 0
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%res = insertelement <2 x i64> %a, i64 %elt, i32 1
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ret <2 x i64> %res
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}
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