test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-shuffle-vector.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple aarch64-apple-ios  -run-pass=aarch64-prelegalizer-combiner %s -o - | FileCheck %s

# Check that we canonicalize shuffle_vector(Src1, Src2, mask(0,1,2,3))
# into concat_vector(Src1, Src2).
---
name: shuffle_vector_to_concat_vector_0123
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $d0, $d1

    ; CHECK-LABEL: name: shuffle_vector_to_concat_vector_0123
    ; CHECK: liveins: $d0, $d1
    ; CHECK: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $d0
    ; CHECK: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $d1
    ; CHECK: [[CONCAT_VECTORS:%[0-9]+]]:_(<4 x s32>) = G_CONCAT_VECTORS [[COPY]](<2 x s32>), [[COPY1]](<2 x s32>)
    ; CHECK: RET_ReallyLR implicit [[CONCAT_VECTORS]](<4 x s32>)
    %0:_(<2 x s32>) = COPY $d0
    %1:_(<2 x s32>) = COPY $d1
    %2:_(<4 x s32>) = G_SHUFFLE_VECTOR %0(<2 x s32>), %1(<2 x s32>), shufflemask(0, 1, 2, 3)
    RET_ReallyLR implicit %2
...
# Check that we canonicalize shuffle_vector(Src1, Src2, mask(2,3,0,1,2,3))
# into concat_vector(Src2, Src1, Src2).
---
name: shuffle_vector_to_concat_vector_230123
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $d0, $d1

    ; CHECK-LABEL: name: shuffle_vector_to_concat_vector_230123
    ; CHECK: liveins: $d0, $d1
    ; CHECK: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $d0
    ; CHECK: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $d1
    ; CHECK: [[CONCAT_VECTORS:%[0-9]+]]:_(<6 x s32>) = G_CONCAT_VECTORS [[COPY1]](<2 x s32>), [[COPY]](<2 x s32>), [[COPY1]](<2 x s32>)
    ; CHECK: RET_ReallyLR implicit [[CONCAT_VECTORS]](<6 x s32>)
    %0:_(<2 x s32>) = COPY $d0
    %1:_(<2 x s32>) = COPY $d1
    %2:_(<6 x s32>) = G_SHUFFLE_VECTOR %0(<2 x s32>), %1(<2 x s32>), shufflemask(2,3,0,1,2,3)
    RET_ReallyLR implicit %2
...
# Check that we canonicalize shuffle_vector(Src1, Src2, mask(2,undef,0,1,undef,3))
# into concat_vector(Src2, Src1, Src2).
---
name: shuffle_vector_to_concat_vector_2undef01undef3
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $d0, $d1

    ; CHECK-LABEL: name: shuffle_vector_to_concat_vector_2undef01undef3
    ; CHECK: liveins: $d0, $d1
    ; CHECK: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $d0
    ; CHECK: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $d1
    ; CHECK: [[CONCAT_VECTORS:%[0-9]+]]:_(<6 x s32>) = G_CONCAT_VECTORS [[COPY1]](<2 x s32>), [[COPY]](<2 x s32>), [[COPY1]](<2 x s32>)
    ; CHECK: RET_ReallyLR implicit [[CONCAT_VECTORS]](<6 x s32>)
    %0:_(<2 x s32>) = COPY $d0
    %1:_(<2 x s32>) = COPY $d1
    %2:_(<6 x s32>) = G_SHUFFLE_VECTOR %0(<2 x s32>), %1(<2 x s32>), shufflemask(2,-1,0,1,-1,3)
    RET_ReallyLR implicit %2
...
# Check that we don't canonicalize shuffle_vector into concat_vectors
# when the sources get half mixed.
---
name: shuffle_vector_to_concat_vector_mixed_src_200123_neg
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $d0, $d1

    ; CHECK-LABEL: name: shuffle_vector_to_concat_vector_mixed_src_200123_neg
    ; CHECK: liveins: $d0, $d1
    ; CHECK: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $d0
    ; CHECK: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $d1
    ; CHECK: [[SHUF:%[0-9]+]]:_(<6 x s32>) = G_SHUFFLE_VECTOR [[COPY]](<2 x s32>), [[COPY1]], shufflemask(2, 0, 0, 1, 2, 3)
    ; CHECK: RET_ReallyLR implicit [[SHUF]](<6 x s32>)
    %0:_(<2 x s32>) = COPY $d0
    %1:_(<2 x s32>) = COPY $d1
    %2:_(<6 x s32>) = G_SHUFFLE_VECTOR %0(<2 x s32>), %1(<2 x s32>), shufflemask(2,0,0,1,2,3)
    RET_ReallyLR implicit %2
...
# Check that we produce implicit_def while canonicalizing shuffle_vector(Src1, Src2, mask(2,undef,undef,undef,undef,1))
# into concat_vector(Src2, undef, Src1).
---
name: shuffle_vector_to_concat_vector_2undef1
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $d0, $d1

    ; CHECK-LABEL: name: shuffle_vector_to_concat_vector_2undef1
    ; CHECK: liveins: $d0, $d1
    ; CHECK: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $d0
    ; CHECK: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $d1
    ; CHECK: [[DEF:%[0-9]+]]:_(<2 x s32>) = G_IMPLICIT_DEF
    ; CHECK: [[CONCAT_VECTORS:%[0-9]+]]:_(<6 x s32>) = G_CONCAT_VECTORS [[COPY1]](<2 x s32>), [[DEF]](<2 x s32>), [[COPY]](<2 x s32>)
    ; CHECK: RET_ReallyLR implicit [[CONCAT_VECTORS]](<6 x s32>)
    %0:_(<2 x s32>) = COPY $d0
    %1:_(<2 x s32>) = COPY $d1
    %2:_(<6 x s32>) = G_SHUFFLE_VECTOR %0(<2 x s32>), %1(<2 x s32>), shufflemask(2,-1,-1,-1,-1,1)
    RET_ReallyLR implicit %2
...
# Check that we don't canonicalize shuffle_vector into concat_vectors
# if a source is flipped.
---
name: shuffle_vector_to_concat_vector_src_flipped_230132_neg
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $d0, $d1

    ; CHECK-LABEL: name: shuffle_vector_to_concat_vector_src_flipped_230132_neg
    ; CHECK: liveins: $d0, $d1
    ; CHECK: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $d0
    ; CHECK: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $d1
    ; CHECK: [[SHUF:%[0-9]+]]:_(<6 x s32>) = G_SHUFFLE_VECTOR [[COPY]](<2 x s32>), [[COPY1]], shufflemask(2, 3, 0, 1, 3, 2)
    ; CHECK: RET_ReallyLR implicit [[SHUF]](<6 x s32>)
    %0:_(<2 x s32>) = COPY $d0
    %1:_(<2 x s32>) = COPY $d1
    %2:_(<6 x s32>) = G_SHUFFLE_VECTOR %0(<2 x s32>), %1(<2 x s32>), shufflemask(2,3,0,1,3,2)
    RET_ReallyLR implicit %2
...
# Check that we don't canonicalize shuffle_vector into concat_vectors
# if a source is flipped and the other half is undef.
---
name: shuffle_vector_to_concat_vector_src_flipped_23013undef_neg
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $d0, $d1

    ; CHECK-LABEL: name: shuffle_vector_to_concat_vector_src_flipped_23013undef_neg
    ; CHECK: liveins: $d0, $d1
    ; CHECK: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $d0
    ; CHECK: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $d1
    ; CHECK: [[SHUF:%[0-9]+]]:_(<6 x s32>) = G_SHUFFLE_VECTOR [[COPY]](<2 x s32>), [[COPY1]], shufflemask(2, 3, 0, 1, 3, undef)
    ; CHECK: RET_ReallyLR implicit [[SHUF]](<6 x s32>)
    %0:_(<2 x s32>) = COPY $d0
    %1:_(<2 x s32>) = COPY $d1
    %2:_(<6 x s32>) = G_SHUFFLE_VECTOR %0(<2 x s32>), %1(<2 x s32>), shufflemask(2,3,0,1,3,-1)
    RET_ReallyLR implicit %2
...

# Check that we canonicalize shuffle_vector(Src1, Src2, mask(0,1,2,3,4,5,6,7))
# into concat_vector(Src1, Src2) with bigger vector type.
---
name: shuffle_vector_to_concat_vector_01234567
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $q0, $q1

    ; CHECK-LABEL: name: shuffle_vector_to_concat_vector_01234567
    ; CHECK: liveins: $q0, $q1
    ; CHECK: [[COPY:%[0-9]+]]:_(<4 x s32>) = COPY $q0
    ; CHECK: [[COPY1:%[0-9]+]]:_(<4 x s32>) = COPY $q1
    ; CHECK: [[CONCAT_VECTORS:%[0-9]+]]:_(<8 x s32>) = G_CONCAT_VECTORS [[COPY]](<4 x s32>), [[COPY1]](<4 x s32>)
    ; CHECK: RET_ReallyLR implicit [[CONCAT_VECTORS]](<8 x s32>)
    %0:_(<4 x s32>) = COPY $q0
    %1:_(<4 x s32>) = COPY $q1
    %2:_(<8 x s32>) = G_SHUFFLE_VECTOR %0(<4 x s32>), %1(<4 x s32>), shufflemask(0, 1, 2, 3, 4, 5, 6, 7)
    RET_ReallyLR implicit %2
...
# Check that we canonicalize shuffle_vector(Src1, Src2, mask(4,5,6,7,0,1,2,3))
# into concat_vector(Src2, Src1, Src2) with bigger vector type.
---
name: shuffle_vector_to_concat_vector_45670123
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $q0, $q1

    ; CHECK-LABEL: name: shuffle_vector_to_concat_vector_45670123
    ; CHECK: liveins: $q0, $q1
    ; CHECK: [[COPY:%[0-9]+]]:_(<4 x s32>) = COPY $q0
    ; CHECK: [[COPY1:%[0-9]+]]:_(<4 x s32>) = COPY $q1
    ; CHECK: [[CONCAT_VECTORS:%[0-9]+]]:_(<12 x s32>) = G_CONCAT_VECTORS [[COPY1]](<4 x s32>), [[COPY]](<4 x s32>), [[COPY1]](<4 x s32>)
    ; CHECK: RET_ReallyLR implicit [[CONCAT_VECTORS]](<12 x s32>)
    %0:_(<4 x s32>) = COPY $q0
    %1:_(<4 x s32>) = COPY $q1
    %2:_(<12 x s32>) = G_SHUFFLE_VECTOR %0(<4 x s32>), %1(<4 x s32>), shufflemask(4,5,6,7,0,1,2,3,4,5,6,7)
    RET_ReallyLR implicit %2
...
# Check that we canonicalize shuffle_vector(Src1, Src2, mask(4,5,undef,undef,0,1,2,3,undef,undef,6,7))
# into concat_vector(Src2, Src1, Src2) with bigger vector type.
---
name: shuffle_vector_to_concat_vector_45undefundef0123undefundef67
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $q0, $q1

    ; CHECK-LABEL: name: shuffle_vector_to_concat_vector_45undefundef0123undefundef67
    ; CHECK: liveins: $q0, $q1
    ; CHECK: [[COPY:%[0-9]+]]:_(<4 x s32>) = COPY $q0
    ; CHECK: [[COPY1:%[0-9]+]]:_(<4 x s32>) = COPY $q1
    ; CHECK: [[CONCAT_VECTORS:%[0-9]+]]:_(<12 x s32>) = G_CONCAT_VECTORS [[COPY1]](<4 x s32>), [[COPY]](<4 x s32>), [[COPY1]](<4 x s32>)
    ; CHECK: RET_ReallyLR implicit [[CONCAT_VECTORS]](<12 x s32>)
    %0:_(<4 x s32>) = COPY $q0
    %1:_(<4 x s32>) = COPY $q1
    %2:_(<12 x s32>) = G_SHUFFLE_VECTOR %0(<4 x s32>), %1(<4 x s32>), shufflemask(4,5,-1,-1,0,1,2,3,-1,-1,6,7)
    RET_ReallyLR implicit %2
...
# Check that we don't canonicalize shuffle_vector into concat_vectors
# when the sources get half mixed with bigger vector type.
---
name: shuffle_vector_to_concat_vector_mixed_src_456000123_neg
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $q0, $q1

    ; CHECK-LABEL: name: shuffle_vector_to_concat_vector_mixed_src_456000123_neg
    ; CHECK: liveins: $q0, $q1
    ; CHECK: [[COPY:%[0-9]+]]:_(<4 x s32>) = COPY $q0
    ; CHECK: [[COPY1:%[0-9]+]]:_(<4 x s32>) = COPY $q1
    ; CHECK: [[SHUF:%[0-9]+]]:_(<8 x s32>) = G_SHUFFLE_VECTOR [[COPY]](<4 x s32>), [[COPY1]], shufflemask(4, 5, 6, 0, 0, 1, 2, 3)
    ; CHECK: RET_ReallyLR implicit [[SHUF]](<8 x s32>)
    %0:_(<4 x s32>) = COPY $q0
    %1:_(<4 x s32>) = COPY $q1
    %2:_(<8 x s32>) = G_SHUFFLE_VECTOR %0(<4 x s32>), %1(<4 x s32>), shufflemask(4,5,6,0,0,1,2,3)
    RET_ReallyLR implicit %2
...
# Check that we produce implicit_def while canonicalizing shuffle_vector(Src1, Src2, mask(2,undef,undef,undef,undef,1))
# into concat_vector(Src2, undef, Src1) with bigger vector type.
---
name: shuffle_vector_to_concat_vector_45undefundefundefundefundefundefundefundef23
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $q0, $q1

    ; CHECK-LABEL: name: shuffle_vector_to_concat_vector_45undefundefundefundefundefundefundefundef23
    ; CHECK: liveins: $q0, $q1
    ; CHECK: [[COPY:%[0-9]+]]:_(<4 x s32>) = COPY $q0
    ; CHECK: [[COPY1:%[0-9]+]]:_(<4 x s32>) = COPY $q1
    ; CHECK: [[DEF:%[0-9]+]]:_(<4 x s32>) = G_IMPLICIT_DEF
    ; CHECK: [[CONCAT_VECTORS:%[0-9]+]]:_(<12 x s32>) = G_CONCAT_VECTORS [[COPY1]](<4 x s32>), [[DEF]](<4 x s32>), [[COPY]](<4 x s32>)
    ; CHECK: RET_ReallyLR implicit [[CONCAT_VECTORS]](<12 x s32>)
    %0:_(<4 x s32>) = COPY $q0
    %1:_(<4 x s32>) = COPY $q1
    %2:_(<12 x s32>) = G_SHUFFLE_VECTOR %0(<4 x s32>), %1(<4 x s32>), shufflemask(4,5,-1,-1,-1,-1,-1,-1,-1,-1,2,3)
    RET_ReallyLR implicit %2
...
# Check that we don't canonicalize shuffle_vector into concat_vectors
# when we grab less than the full vectors.
---
name: shuffle_vector_to_concat_vector_4501_neg
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $q0, $q1

    ; CHECK-LABEL: name: shuffle_vector_to_concat_vector_4501_neg
    ; CHECK: liveins: $q0, $q1
    ; CHECK: [[COPY:%[0-9]+]]:_(<4 x s32>) = COPY $q0
    ; CHECK: [[COPY1:%[0-9]+]]:_(<4 x s32>) = COPY $q1
    ; CHECK: [[SHUF:%[0-9]+]]:_(<4 x s32>) = G_SHUFFLE_VECTOR [[COPY]](<4 x s32>), [[COPY1]], shufflemask(4, 5, 0, 1)
    ; CHECK: RET_ReallyLR implicit [[SHUF]](<4 x s32>)
    %0:_(<4 x s32>) = COPY $q0
    %1:_(<4 x s32>) = COPY $q1
    %2:_(<4 x s32>) = G_SHUFFLE_VECTOR %0(<4 x s32>), %1(<4 x s32>), shufflemask(4,5,0,1)
    RET_ReallyLR implicit %2
...
# Check that we don't canonicalize shuffle_vector into concat_vectors
# if a source is flipped and the other half is undef with bigger vector.
---
name: shuffle_vector_to_concat_vector_src_flipped_4567012367undefundef_neg
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $q0, $q1

    ; CHECK-LABEL: name: shuffle_vector_to_concat_vector_src_flipped_4567012367undefundef_neg
    ; CHECK: liveins: $q0, $q1
    ; CHECK: [[COPY:%[0-9]+]]:_(<4 x s32>) = COPY $q0
    ; CHECK: [[COPY1:%[0-9]+]]:_(<4 x s32>) = COPY $q1
    ; CHECK: [[SHUF:%[0-9]+]]:_(<12 x s32>) = G_SHUFFLE_VECTOR [[COPY]](<4 x s32>), [[COPY1]], shufflemask(4, 5, 6, 7, 0, 1, 2, 3, 6, 7, undef, undef)
    ; CHECK: RET_ReallyLR implicit [[SHUF]](<12 x s32>)
    %0:_(<4 x s32>) = COPY $q0
    %1:_(<4 x s32>) = COPY $q1
    %2:_(<12 x s32>) = G_SHUFFLE_VECTOR %0(<4 x s32>), %1(<4 x s32>), shufflemask(4,5,6,7,0,1,2,3,6,7,-1,-1)
    RET_ReallyLR implicit %2
...
# Check that we canonicalize shuffle_vector(Src1, Src2, mask(4,5,undef,undef,0,1,2,3,undef,undef,6,7))
# into concat_vector(Src2, Src1, Src2) with vector of pointers.
---
name: shuffle_vector_to_concat_vector_45undefundef0123undefundef67_ptr
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $q0_q1, $q2_q3

    ; CHECK-LABEL: name: shuffle_vector_to_concat_vector_45undefundef0123undefundef67_ptr
    ; CHECK: liveins: $q0_q1, $q2_q3
    ; CHECK: [[COPY:%[0-9]+]]:_(<4 x p0>) = COPY $q0_q1
    ; CHECK: [[COPY1:%[0-9]+]]:_(<4 x p0>) = COPY $q2_q3
    ; CHECK: [[CONCAT_VECTORS:%[0-9]+]]:_(<12 x p0>) = G_CONCAT_VECTORS [[COPY1]](<4 x p0>), [[COPY]](<4 x p0>), [[COPY1]](<4 x p0>)
    ; CHECK: RET_ReallyLR implicit [[CONCAT_VECTORS]](<12 x p0>)
    %0:_(<4 x p0>) = COPY $q0_q1
    %1:_(<4 x p0>) = COPY $q2_q3
    %2:_(<12 x p0>) = G_SHUFFLE_VECTOR %0(<4 x p0>), %1(<4 x p0>), shufflemask(4,5,-1,-1,0,1,2,3,-1,-1,6,7)
    RET_ReallyLR implicit %2
...
# Check that we don't canonicalize shuffle_vector into concat_vectors
# when the sources get half mixed with vector of pointers.
---
name: shuffle_vector_to_concat_vector_mixed_src_456000123_neg_ptr
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $q0_q1, $q2_q3

    ; CHECK-LABEL: name: shuffle_vector_to_concat_vector_mixed_src_456000123_neg_ptr
    ; CHECK: liveins: $q0_q1, $q2_q3
    ; CHECK: [[COPY:%[0-9]+]]:_(<4 x p0>) = COPY $q0_q1
    ; CHECK: [[COPY1:%[0-9]+]]:_(<4 x p0>) = COPY $q2_q3
    ; CHECK: [[SHUF:%[0-9]+]]:_(<8 x p0>) = G_SHUFFLE_VECTOR [[COPY]](<4 x p0>), [[COPY1]], shufflemask(4, 5, 6, 0, 0, 1, 2, 3)
    ; CHECK: RET_ReallyLR implicit [[SHUF]](<8 x p0>)
    %0:_(<4 x p0>) = COPY $q0_q1
    %1:_(<4 x p0>) = COPY $q2_q3
    %2:_(<8 x p0>) = G_SHUFFLE_VECTOR %0(<4 x p0>), %1(<4 x p0>), shufflemask(4,5,6,0,0,1,2,3)
    RET_ReallyLR implicit %2
...

# Check that shuffle_vector gets combined into concat_vectors then the
# concat_vectors gets combined into build_vector.
---
name: shuffle_vector_to_build_vector_ptr
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $x0, $x1, $x2, $x3

    ; CHECK-LABEL: name: shuffle_vector_to_build_vector_ptr
    ; CHECK: liveins: $x0, $x1, $x2, $x3
    ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $x0
    ; CHECK: [[COPY1:%[0-9]+]]:_(p0) = COPY $x1
    ; CHECK: [[COPY2:%[0-9]+]]:_(p0) = COPY $x2
    ; CHECK: [[COPY3:%[0-9]+]]:_(p0) = COPY $x3
    ; CHECK: [[BUILD_VECTOR:%[0-9]+]]:_(<4 x p0>) = G_BUILD_VECTOR [[COPY]](p0), [[COPY1]](p0), [[COPY2]](p0), [[COPY3]](p0)
    ; CHECK: RET_ReallyLR implicit [[BUILD_VECTOR]](<4 x p0>)
    %0:_(p0) = COPY $x0
    %1:_(p0) = COPY $x1
    %2:_(p0) = COPY $x2
    %3:_(p0) = COPY $x3
    %4:_(<2 x p0>) = G_BUILD_VECTOR %0(p0), %1
    %5:_(<2 x p0>) = G_BUILD_VECTOR %2(p0), %3
    %6:_(<4 x p0>) = G_SHUFFLE_VECTOR %4(<2 x p0>), %5(<2 x p0>), shufflemask(0,1,2,3)
    RET_ReallyLR implicit %6
...

# Check that shuffle_vector on scalars gets combined into build_vector.
---
name: shuffle_vector_on_scalars_to_build_vector_ptr
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $x0, $x1

    ; CHECK-LABEL: name: shuffle_vector_on_scalars_to_build_vector_ptr
    ; CHECK: liveins: $x0, $x1
    ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $x0
    ; CHECK: [[COPY1:%[0-9]+]]:_(p0) = COPY $x1
    ; CHECK: [[BUILD_VECTOR:%[0-9]+]]:_(<4 x p0>) = G_BUILD_VECTOR [[COPY]](p0), [[COPY1]](p0), [[COPY]](p0), [[COPY1]](p0)
    ; CHECK: RET_ReallyLR implicit [[BUILD_VECTOR]](<4 x p0>)
    %0:_(p0) = COPY $x0
    %1:_(p0) = COPY $x1
    %6:_(<4 x p0>) = G_SHUFFLE_VECTOR %0, %1, shufflemask(0,1,0,1)
    RET_ReallyLR implicit %6
...

# Check that shuffle_vector on scalars gets combined into build_vector,
# even if we swap the order of the operands.
---
name: shuffle_vector_on_scalars_to_build_vector_swap_ptr
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $x0, $x1

    ; CHECK-LABEL: name: shuffle_vector_on_scalars_to_build_vector_swap_ptr
    ; CHECK: liveins: $x0, $x1
    ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $x0
    ; CHECK: [[COPY1:%[0-9]+]]:_(p0) = COPY $x1
    ; CHECK: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x p0>) = G_BUILD_VECTOR [[COPY1]](p0), [[COPY]](p0)
    ; CHECK: RET_ReallyLR implicit [[BUILD_VECTOR]](<2 x p0>)
    %0:_(p0) = COPY $x0
    %1:_(p0) = COPY $x1
    %6:_(<2 x p0>) = G_SHUFFLE_VECTOR %0, %1, shufflemask(1,0)
    RET_ReallyLR implicit %6
...

# Check that we properly use undef values when shuffle_vector
# on scalars gets lowered to build_vector.
---
name: shuffle_vector_on_scalars_to_build_vector_with_undef
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $x0, $x1

    ; CHECK-LABEL: name: shuffle_vector_on_scalars_to_build_vector_with_undef
    ; CHECK: liveins: $x0, $x1
    ; CHECK: [[COPY:%[0-9]+]]:_(s64) = COPY $x0
    ; CHECK: [[COPY1:%[0-9]+]]:_(s64) = COPY $x1
    ; CHECK: [[DEF:%[0-9]+]]:_(s64) = G_IMPLICIT_DEF
    ; CHECK: [[BUILD_VECTOR:%[0-9]+]]:_(<4 x s64>) = G_BUILD_VECTOR [[COPY]](s64), [[DEF]](s64), [[DEF]](s64), [[COPY1]](s64)
    ; CHECK: RET_ReallyLR implicit [[BUILD_VECTOR]](<4 x s64>)
    %0:_(s64) = COPY $x0
    %1:_(s64) = COPY $x1
    %6:_(<4 x s64>) = G_SHUFFLE_VECTOR %0, %1, shufflemask(0,-1,-1,1)
    RET_ReallyLR implicit %6
...

# Check that shuffle_vector on scalars gets combined into a plain
# copy when the resulting type is a scalar as well and the sizes
# are compatible.
---
name: shuffle_vector_on_scalars_to_copy_ptr
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $x0

    ; CHECK-LABEL: name: shuffle_vector_on_scalars_to_copy_ptr
    ; CHECK: liveins: $x0
    ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $x0
    ; CHECK: RET_ReallyLR implicit [[COPY]](p0)
    %0:_(p0) = COPY $x0
    %6:_(p0) = G_SHUFFLE_VECTOR %0, %0, shufflemask(0)
    RET_ReallyLR implicit %6
...

# Check that shuffle_vector on vector doesn't get combined
# when the resulting type is a scalar.
# We should be able to replace this by an extract vector element,
# but that's not implemented yet.
---
name: shuffle_vector_to_copy_neg
tracksRegLiveness: true
body:             |
  bb.1:
    liveins: $x0, $x1

    ; CHECK-LABEL: name: shuffle_vector_to_copy_neg
    ; CHECK: liveins: $x0, $x1
    ; CHECK: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $x0
    ; CHECK: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $x1
    ; CHECK: [[SHUF:%[0-9]+]]:_(s32) = G_SHUFFLE_VECTOR [[COPY]](<2 x s32>), [[COPY1]], shufflemask(1)
    ; CHECK: RET_ReallyLR implicit [[SHUF]](s32)
    %0:_(<2 x s32>) = COPY $x0
    %1:_(<2 x s32>) = COPY $x1
    %6:_(s32) = G_SHUFFLE_VECTOR %0, %1, shufflemask(1)
    RET_ReallyLR implicit %6
...