llvm-project/llvm/test/CodeGen/ARM/vrev.ll

; RUN: llc -mtriple=arm-eabi -mattr=+neon %s -o - | FileCheck %s

define <8 x i8> @test_vrev64D8(<8 x i8>* %A) nounwind {
;CHECK-LABEL: test_vrev64D8:
;CHECK: vrev64.8
	%tmp1 = load <8 x i8>, <8 x i8>* %A
	%tmp2 = shufflevector <8 x i8> %tmp1, <8 x i8> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
	ret <8 x i8> %tmp2
}

define <4 x i16> @test_vrev64D16(<4 x i16>* %A) nounwind {
;CHECK-LABEL: test_vrev64D16:
;CHECK: vrev64.16
	%tmp1 = load <4 x i16>, <4 x i16>* %A
	%tmp2 = shufflevector <4 x i16> %tmp1, <4 x i16> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
	ret <4 x i16> %tmp2
}

define <2 x i32> @test_vrev64D32(<2 x i32>* %A) nounwind {
;CHECK-LABEL: test_vrev64D32:
;CHECK: vrev64.32
	%tmp1 = load <2 x i32>, <2 x i32>* %A
	%tmp2 = shufflevector <2 x i32> %tmp1, <2 x i32> undef, <2 x i32> <i32 1, i32 0>
	ret <2 x i32> %tmp2
}

define <2 x float> @test_vrev64Df(<2 x float>* %A) nounwind {
;CHECK-LABEL: test_vrev64Df:
;CHECK: vrev64.32
	%tmp1 = load <2 x float>, <2 x float>* %A
	%tmp2 = shufflevector <2 x float> %tmp1, <2 x float> undef, <2 x i32> <i32 1, i32 0>
	ret <2 x float> %tmp2
}

define <16 x i8> @test_vrev64Q8(<16 x i8>* %A) nounwind {
;CHECK-LABEL: test_vrev64Q8:
;CHECK: vrev64.8
	%tmp1 = load <16 x i8>, <16 x i8>* %A
	%tmp2 = shufflevector <16 x i8> %tmp1, <16 x i8> undef, <16 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8>
	ret <16 x i8> %tmp2
}

define <8 x i16> @test_vrev64Q16(<8 x i16>* %A) nounwind {
;CHECK-LABEL: test_vrev64Q16:
;CHECK: vrev64.16
	%tmp1 = load <8 x i16>, <8 x i16>* %A
	%tmp2 = shufflevector <8 x i16> %tmp1, <8 x i16> undef, <8 x i32> <i32 3, i32 2, i32 1, i32 0, i32 7, i32 6, i32 5, i32 4>
	ret <8 x i16> %tmp2
}

define <4 x i32> @test_vrev64Q32(<4 x i32>* %A) nounwind {
;CHECK-LABEL: test_vrev64Q32:
;CHECK: vrev64.32
	%tmp1 = load <4 x i32>, <4 x i32>* %A
	%tmp2 = shufflevector <4 x i32> %tmp1, <4 x i32> undef, <4 x i32> <i32 1, i32 0, i32 3, i32 2>
	ret <4 x i32> %tmp2
}

define <4 x float> @test_vrev64Qf(<4 x float>* %A) nounwind {
;CHECK-LABEL: test_vrev64Qf:
;CHECK: vrev64.32
	%tmp1 = load <4 x float>, <4 x float>* %A
	%tmp2 = shufflevector <4 x float> %tmp1, <4 x float> undef, <4 x i32> <i32 1, i32 0, i32 3, i32 2>
	ret <4 x float> %tmp2
}

define <8 x i8> @test_vrev32D8(<8 x i8>* %A) nounwind {
;CHECK-LABEL: test_vrev32D8:
;CHECK: vrev32.8
	%tmp1 = load <8 x i8>, <8 x i8>* %A
	%tmp2 = shufflevector <8 x i8> %tmp1, <8 x i8> undef, <8 x i32> <i32 3, i32 2, i32 1, i32 0, i32 7, i32 6, i32 5, i32 4>
	ret <8 x i8> %tmp2
}

define <4 x i16> @test_vrev32D16(<4 x i16>* %A) nounwind {
;CHECK-LABEL: test_vrev32D16:
;CHECK: vrev32.16
	%tmp1 = load <4 x i16>, <4 x i16>* %A
	%tmp2 = shufflevector <4 x i16> %tmp1, <4 x i16> undef, <4 x i32> <i32 1, i32 0, i32 3, i32 2>
	ret <4 x i16> %tmp2
}

define <16 x i8> @test_vrev32Q8(<16 x i8>* %A) nounwind {
;CHECK-LABEL: test_vrev32Q8:
;CHECK: vrev32.8
	%tmp1 = load <16 x i8>, <16 x i8>* %A
	%tmp2 = shufflevector <16 x i8> %tmp1, <16 x i8> undef, <16 x i32> <i32 3, i32 2, i32 1, i32 0, i32 7, i32 6, i32 5, i32 4, i32 11, i32 10, i32 9, i32 8, i32 15, i32 14, i32 13, i32 12>
	ret <16 x i8> %tmp2
}

define <8 x i16> @test_vrev32Q16(<8 x i16>* %A) nounwind {
;CHECK-LABEL: test_vrev32Q16:
;CHECK: vrev32.16
	%tmp1 = load <8 x i16>, <8 x i16>* %A
	%tmp2 = shufflevector <8 x i16> %tmp1, <8 x i16> undef, <8 x i32> <i32 1, i32 0, i32 3, i32 2, i32 5, i32 4, i32 7, i32 6>
	ret <8 x i16> %tmp2
}

define <8 x i8> @test_vrev16D8(<8 x i8>* %A) nounwind {
;CHECK-LABEL: test_vrev16D8:
;CHECK: vrev16.8
	%tmp1 = load <8 x i8>, <8 x i8>* %A
	%tmp2 = shufflevector <8 x i8> %tmp1, <8 x i8> undef, <8 x i32> <i32 1, i32 0, i32 3, i32 2, i32 5, i32 4, i32 7, i32 6>
	ret <8 x i8> %tmp2
}

define <16 x i8> @test_vrev16Q8(<16 x i8>* %A) nounwind {
;CHECK-LABEL: test_vrev16Q8:
;CHECK: vrev16.8
	%tmp1 = load <16 x i8>, <16 x i8>* %A
	%tmp2 = shufflevector <16 x i8> %tmp1, <16 x i8> undef, <16 x i32> <i32 1, i32 0, i32 3, i32 2, i32 5, i32 4, i32 7, i32 6, i32 9, i32 8, i32 11, i32 10, i32 13, i32 12, i32 15, i32 14>
	ret <16 x i8> %tmp2
}

; Undef shuffle indices should not prevent matching to VREV:

define <8 x i8> @test_vrev64D8_undef(<8 x i8>* %A) nounwind {
;CHECK-LABEL: test_vrev64D8_undef:
;CHECK: vrev64.8
	%tmp1 = load <8 x i8>, <8 x i8>* %A
	%tmp2 = shufflevector <8 x i8> %tmp1, <8 x i8> undef, <8 x i32> <i32 7, i32 undef, i32 undef, i32 4, i32 3, i32 2, i32 1, i32 0>
	ret <8 x i8> %tmp2
}

define <8 x i16> @test_vrev32Q16_undef(<8 x i16>* %A) nounwind {
;CHECK-LABEL: test_vrev32Q16_undef:
;CHECK: vrev32.16
	%tmp1 = load <8 x i16>, <8 x i16>* %A
	%tmp2 = shufflevector <8 x i16> %tmp1, <8 x i16> undef, <8 x i32> <i32 undef, i32 0, i32 undef, i32 2, i32 5, i32 4, i32 7, i32 undef>
	ret <8 x i16> %tmp2
}

; A vcombine feeding a VREV should not obscure things.  Radar 8597007.

define void @test_with_vcombine(<4 x float>* %v) nounwind {
;CHECK-LABEL: test_with_vcombine:
;CHECK-NOT: vext
;CHECK: vrev64.32
  %tmp1 = load <4 x float>, <4 x float>* %v, align 16
  %tmp2 = bitcast <4 x float> %tmp1 to <2 x double>
  %tmp3 = extractelement <2 x double> %tmp2, i32 0
  %tmp4 = bitcast double %tmp3 to <2 x float>
  %tmp5 = extractelement <2 x double> %tmp2, i32 1
  %tmp6 = bitcast double %tmp5 to <2 x float>
  %tmp7 = fadd <2 x float> %tmp6, %tmp6
  %tmp8 = shufflevector <2 x float> %tmp4, <2 x float> %tmp7, <4 x i32> <i32 1, i32 0, i32 3, i32 2>
  store <4 x float> %tmp8, <4 x float>* %v, align 16
  ret void
}

; The type <2 x i16> is legalized to <2 x i32> and need to be trunc-stored
; to <2 x i16> when stored to memory.
define void @test_vrev64(<4 x i16>* nocapture %source, <2 x i16>* nocapture %dst) nounwind ssp {
; CHECK-LABEL: test_vrev64:
; CHECK: vst1.32
entry:
  %0 = bitcast <4 x i16>* %source to <8 x i16>*
  %tmp2 = load <8 x i16>, <8 x i16>* %0, align 4
  %tmp3 = extractelement <8 x i16> %tmp2, i32 6
  %tmp5 = insertelement <2 x i16> undef, i16 %tmp3, i32 0
  %tmp9 = extractelement <8 x i16> %tmp2, i32 5
  %tmp11 = insertelement <2 x i16> %tmp5, i16 %tmp9, i32 1
  store <2 x i16> %tmp11, <2 x i16>* %dst, align 4
  ret void
}

; Test vrev of float4
define void @float_vrev64(float* nocapture %source, <4 x float>* nocapture %dest) nounwind noinline ssp {
; CHECK: float_vrev64
; CHECK: vext.32
; CHECK: vrev64.32
entry:
  %0 = bitcast float* %source to <4 x float>*
  %tmp2 = load <4 x float>, <4 x float>* %0, align 4
  %tmp5 = shufflevector <4 x float> <float 0.000000e+00, float undef, float undef, float undef>, <4 x float> %tmp2, <4 x i32> <i32 0, i32 7, i32 0, i32 0>
  %arrayidx8 = getelementptr inbounds <4 x float>, <4 x float>* %dest, i32 11
  store <4 x float> %tmp5, <4 x float>* %arrayidx8, align 4
  ret void
}

define <4 x i32> @test_vrev32_bswap(<4 x i32> %source) nounwind {
; CHECK-LABEL: test_vrev32_bswap:
; CHECK: vrev32.8
  %bswap = call <4 x i32> @llvm.bswap.v4i32(<4 x i32> %source)
  ret <4 x i32> %bswap
}

declare <4 x i32> @llvm.bswap.v4i32(<4 x i32>) nounwind readnone