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d592d77960
These are general queries, so they should not die when given a degenerate input like an all undef mask. Callers should be able to deal with an op that will eventually be simplified away. llvm-svn: 358761
17 lines
736 B
LLVM
17 lines
736 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=aarch64-- | FileCheck %s
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; A shuffle mask with all undef elements is always legal.
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define <4 x i32> @PR41535(<2 x i32> %p1, <2 x i32> %p2) {
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; CHECK-LABEL: PR41535:
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; CHECK: // %bb.0:
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; CHECK-NEXT: ext v0.8b, v0.8b, v1.8b, #4
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; CHECK-NEXT: mov v0.d[1], v0.d[0]
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; CHECK-NEXT: ret
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%cat1 = shufflevector <2 x i32> %p1, <2 x i32> undef, <4 x i32> <i32 undef, i32 1, i32 undef, i32 undef>
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%cat2 = shufflevector <2 x i32> %p2, <2 x i32> undef, <4 x i32> <i32 0, i32 undef, i32 undef, i32 undef>
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%r = shufflevector <4 x i32> %cat1, <4 x i32> %cat2, <4 x i32> <i32 undef, i32 undef, i32 1, i32 4>
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ret <4 x i32> %r
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}
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