test/CodeGen/ARM/vrev.ll

; RUN: llc < %s -march=arm -mattr=+neon | FileCheck %s

define <8 x i8> @test_vrev64D8(<8 x i8>* %A) nounwind {
;CHECK: test_vrev64D8:
;CHECK: vrev64.8
	%tmp1 = load <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: test_vrev64D16:
;CHECK: vrev64.16
	%tmp1 = load <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: test_vrev64D32:
;CHECK: vrev64.32
	%tmp1 = load <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: test_vrev64Df:
;CHECK: vrev64.32
	%tmp1 = load <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: test_vrev64Q8:
;CHECK: vrev64.8
	%tmp1 = load <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: test_vrev64Q16:
;CHECK: vrev64.16
	%tmp1 = load <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: test_vrev64Q32:
;CHECK: vrev64.32
	%tmp1 = load <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: test_vrev64Qf:
;CHECK: vrev64.32
	%tmp1 = load <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: test_vrev32D8:
;CHECK: vrev32.8
	%tmp1 = load <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: test_vrev32D16:
;CHECK: vrev32.16
	%tmp1 = load <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: test_vrev32Q8:
;CHECK: vrev32.8
	%tmp1 = load <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: test_vrev32Q16:
;CHECK: vrev32.16
	%tmp1 = load <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: test_vrev16D8:
;CHECK: vrev16.8
	%tmp1 = load <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: test_vrev16Q8:
;CHECK: vrev16.8
	%tmp1 = load <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: test_vrev64D8_undef:
;CHECK: vrev64.8
	%tmp1 = load <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: test_vrev32Q16_undef:
;CHECK: vrev32.16
	%tmp1 = load <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: test_with_vcombine:
;CHECK-NOT: vext
;CHECK: vrev64.32
  %tmp1 = load <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
}

;  Test the shuffle of a 4xi16 which exposed a problem with the perfect shuffle table
;  entry for vrev. 
define void @test_vrev64(<4 x i16>* nocapture %source, <2 x i16>* nocapture %dst) nounwind ssp {
; CHECK: test_vrev64:
; CHECK: vrev64.16
; CHECK: vext.16
entry:
  %0 = bitcast <4 x i16>* %source to <8 x i16>*
  %tmp2 = load <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
}