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8fe0e6eb01
This check currently doesn't seem to do anything useful on any in-tree target: On non-x86, it always evaluates to false, so we never hit the code path that creates the shuffle with zero. On x86, it just forwards to isShuffleMaskLegal(), which is a reasonable thing to query in general, but doesn't make sense if only restricted to zero blends. Differential Revision: https://reviews.llvm.org/D24625 llvm-svn: 282567
39 lines
1.6 KiB
LLVM
39 lines
1.6 KiB
LLVM
; Test vector shuffles on vectors with implicitly extended elements
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | \
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; RUN: FileCheck -check-prefix=CHECK-CODE %s
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | \
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; RUN: FileCheck -check-prefix=CHECK-VECTOR %s
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define <4 x i16> @f1(<4 x i16> %x) {
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; CHECK-CODE-LABEL: f1:
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; CHECK-CODE: larl [[REG:%r[0-5]]],
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; CHECK-CODE: vl [[MASK:%v[0-9]+]], 0([[REG]])
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; CHECK-CODE: vgbm [[ELT:%v[0-9]+]], 0
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; CHECK-CODE: vperm %v24, %v24, [[ELT]], [[MASK]]
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; CHECK-CODE: br %r14
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; CHECK-VECTOR: .space 1
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; CHECK-VECTOR-NEXT: .space 1
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; CHECK-VECTOR-NEXT: .space 1
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; CHECK-VECTOR-NEXT: .space 1
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; CHECK-VECTOR-NEXT: .byte 6
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; CHECK-VECTOR-NEXT: .byte 7
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; CHECK-VECTOR-NEXT: .byte 22
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; CHECK-VECTOR-NEXT: .byte 23
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; CHECK-VECTOR-NEXT: .space 1
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; CHECK-VECTOR-NEXT: .space 1
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; CHECK-VECTOR-NEXT: .space 1
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; CHECK-VECTOR-NEXT: .space 1
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; CHECK-VECTOR-NEXT: .space 1
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; CHECK-VECTOR-NEXT: .space 1
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; CHECK-VECTOR-NEXT: .space 1
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; CHECK-VECTOR-NEXT: .space 1
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%elt = extractelement <4 x i16> %x, i32 3
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%vec1 = insertelement <4 x i16> undef, i16 %elt, i32 2
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%vec2 = insertelement <4 x i16> %vec1, i16 0, i32 3
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ret <4 x i16> %vec2
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}
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