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llvm-mirror/test/CodeGen/ARM/reg_sequence.ll
Jim Grosbach 4a2f107b04 ARM VLDR/VSTR instructions don't need a size suffix. 
Canonicallize on the non-suffixed form, but continue to accept assembly that
has any correctly sized type suffix.

llvm-svn: 144583
2011-11-14 23:03:21 +00:00

351 lines
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LLVM
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; RUN: llc < %s -march=arm -mcpu=cortex-a8 | FileCheck %s
; RUN: llc < %s -march=arm -mcpu=cortex-a8 -regalloc=basic | FileCheck %s
; Implementing vld / vst as REG_SEQUENCE eliminates the extra vmov's.
%struct.int16x8_t = type { <8 x i16> }
%struct.int32x4_t = type { <4 x i32> }
%struct.__neon_int8x8x2_t = type { <8 x i8>, <8 x i8> }
%struct.__neon_int8x8x3_t = type { <8 x i8>, <8 x i8>, <8 x i8> }
%struct.__neon_int16x8x2_t = type { <8 x i16>, <8 x i16> }
%struct.__neon_int32x4x2_t = type { <4 x i32>, <4 x i32> }
define void @t1(i16* %i_ptr, i16* %o_ptr, %struct.int32x4_t* nocapture %vT0ptr, %struct.int32x4_t* nocapture %vT1ptr) nounwind {
entry:
; CHECK: t1:
; CHECK: vld1.16
; CHECK-NOT: vmov d
; CHECK: vmovl.s16
; CHECK: vshrn.i32
; CHECK: vshrn.i32
; CHECK-NOT: vmov d
; CHECK-NEXT: vst1.16
%0 = getelementptr inbounds %struct.int32x4_t* %vT0ptr, i32 0, i32 0 ; <<4 x i32>*> [#uses=1]
%1 = load <4 x i32>* %0, align 16 ; <<4 x i32>> [#uses=1]
%2 = getelementptr inbounds %struct.int32x4_t* %vT1ptr, i32 0, i32 0 ; <<4 x i32>*> [#uses=1]
%3 = load <4 x i32>* %2, align 16 ; <<4 x i32>> [#uses=1]
%4 = bitcast i16* %i_ptr to i8* ; <i8*> [#uses=1]
%5 = tail call <8 x i16> @llvm.arm.neon.vld1.v8i16(i8* %4, i32 1) ; <<8 x i16>> [#uses=1]
%6 = bitcast <8 x i16> %5 to <2 x double> ; <<2 x double>> [#uses=2]
%7 = extractelement <2 x double> %6, i32 0 ; <double> [#uses=1]
%8 = bitcast double %7 to <4 x i16> ; <<4 x i16>> [#uses=1]
%9 = sext <4 x i16> %8 to <4 x i32> ; <<4 x i32>> [#uses=1]
%10 = extractelement <2 x double> %6, i32 1 ; <double> [#uses=1]
%11 = bitcast double %10 to <4 x i16> ; <<4 x i16>> [#uses=1]
%12 = sext <4 x i16> %11 to <4 x i32> ; <<4 x i32>> [#uses=1]
%13 = mul <4 x i32> %1, %9 ; <<4 x i32>> [#uses=1]
%14 = mul <4 x i32> %3, %12 ; <<4 x i32>> [#uses=1]
%15 = tail call <4 x i16> @llvm.arm.neon.vshiftn.v4i16(<4 x i32> %13, <4 x i32> <i32 -12, i32 -12, i32 -12, i32 -12>) ; <<4 x i16>> [#uses=1]
%16 = tail call <4 x i16> @llvm.arm.neon.vshiftn.v4i16(<4 x i32> %14, <4 x i32> <i32 -12, i32 -12, i32 -12, i32 -12>) ; <<4 x i16>> [#uses=1]
%17 = shufflevector <4 x i16> %15, <4 x i16> %16, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7> ; <<8 x i16>> [#uses=1]
%18 = bitcast i16* %o_ptr to i8* ; <i8*> [#uses=1]
tail call void @llvm.arm.neon.vst1.v8i16(i8* %18, <8 x i16> %17, i32 1)
ret void
}
define void @t2(i16* %i_ptr, i16* %o_ptr, %struct.int16x8_t* nocapture %vT0ptr, %struct.int16x8_t* nocapture %vT1ptr) nounwind {
entry:
; CHECK: t2:
; CHECK: vld1.16
; CHECK-NOT: vmov
; CHECK: vmul.i16
; CHECK: vld1.16
; CHECK: vmul.i16
; CHECK-NOT: vmov
; CHECK: vst1.16
; CHECK: vst1.16
%0 = getelementptr inbounds %struct.int16x8_t* %vT0ptr, i32 0, i32 0 ; <<8 x i16>*> [#uses=1]
%1 = load <8 x i16>* %0, align 16 ; <<8 x i16>> [#uses=1]
%2 = getelementptr inbounds %struct.int16x8_t* %vT1ptr, i32 0, i32 0 ; <<8 x i16>*> [#uses=1]
%3 = load <8 x i16>* %2, align 16 ; <<8 x i16>> [#uses=1]
%4 = bitcast i16* %i_ptr to i8* ; <i8*> [#uses=1]
%5 = tail call <8 x i16> @llvm.arm.neon.vld1.v8i16(i8* %4, i32 1) ; <<8 x i16>> [#uses=1]
%6 = getelementptr inbounds i16* %i_ptr, i32 8 ; <i16*> [#uses=1]
%7 = bitcast i16* %6 to i8* ; <i8*> [#uses=1]
%8 = tail call <8 x i16> @llvm.arm.neon.vld1.v8i16(i8* %7, i32 1) ; <<8 x i16>> [#uses=1]
%9 = mul <8 x i16> %1, %5 ; <<8 x i16>> [#uses=1]
%10 = mul <8 x i16> %3, %8 ; <<8 x i16>> [#uses=1]
%11 = bitcast i16* %o_ptr to i8* ; <i8*> [#uses=1]
tail call void @llvm.arm.neon.vst1.v8i16(i8* %11, <8 x i16> %9, i32 1)
%12 = getelementptr inbounds i16* %o_ptr, i32 8 ; <i16*> [#uses=1]
%13 = bitcast i16* %12 to i8* ; <i8*> [#uses=1]
tail call void @llvm.arm.neon.vst1.v8i16(i8* %13, <8 x i16> %10, i32 1)
ret void
}
define <8 x i8> @t3(i8* %A, i8* %B) nounwind {
; CHECK: t3:
; CHECK: vld3.8
; CHECK: vmul.i8
; CHECK: vmov r
; CHECK-NOT: vmov d
; CHECK: vst3.8
%tmp1 = call %struct.__neon_int8x8x3_t @llvm.arm.neon.vld3.v8i8(i8* %A, i32 1) ; <%struct.__neon_int8x8x3_t> [#uses=2]
%tmp2 = extractvalue %struct.__neon_int8x8x3_t %tmp1, 0 ; <<8 x i8>> [#uses=1]
%tmp3 = extractvalue %struct.__neon_int8x8x3_t %tmp1, 2 ; <<8 x i8>> [#uses=1]
%tmp4 = extractvalue %struct.__neon_int8x8x3_t %tmp1, 1 ; <<8 x i8>> [#uses=1]
%tmp5 = sub <8 x i8> %tmp3, %tmp4
%tmp6 = add <8 x i8> %tmp2, %tmp3 ; <<8 x i8>> [#uses=1]
%tmp7 = mul <8 x i8> %tmp4, %tmp2
tail call void @llvm.arm.neon.vst3.v8i8(i8* %B, <8 x i8> %tmp5, <8 x i8> %tmp6, <8 x i8> %tmp7, i32 1)
ret <8 x i8> %tmp4
}
define void @t4(i32* %in, i32* %out) nounwind {
entry:
; CHECK: t4:
; CHECK: vld2.32
; CHECK-NOT: vmov
; CHECK: vld2.32
; CHECK-NOT: vmov
; CHECK: bne
%tmp1 = bitcast i32* %in to i8* ; <i8*> [#uses=1]
%tmp2 = tail call %struct.__neon_int32x4x2_t @llvm.arm.neon.vld2.v4i32(i8* %tmp1, i32 1) ; <%struct.__neon_int32x4x2_t> [#uses=2]
%tmp3 = getelementptr inbounds i32* %in, i32 8 ; <i32*> [#uses=1]
%tmp4 = bitcast i32* %tmp3 to i8* ; <i8*> [#uses=1]
%tmp5 = tail call %struct.__neon_int32x4x2_t @llvm.arm.neon.vld2.v4i32(i8* %tmp4, i32 1) ; <%struct.__neon_int32x4x2_t> [#uses=2]
%tmp8 = bitcast i32* %out to i8* ; <i8*> [#uses=1]
br i1 undef, label %return1, label %return2
return1:
; CHECK: %return1
; CHECK-NOT: vmov
; CHECK-NEXT: vadd.i32
; CHECK-NEXT: vadd.i32
; CHECK-NEXT: vst2.32
%tmp52 = extractvalue %struct.__neon_int32x4x2_t %tmp2, 0 ; <<4 x i32>> [#uses=1]
%tmp57 = extractvalue %struct.__neon_int32x4x2_t %tmp2, 1 ; <<4 x i32>> [#uses=1]
%tmp = extractvalue %struct.__neon_int32x4x2_t %tmp5, 0 ; <<4 x i32>> [#uses=1]
%tmp39 = extractvalue %struct.__neon_int32x4x2_t %tmp5, 1 ; <<4 x i32>> [#uses=1]
%tmp6 = add <4 x i32> %tmp52, %tmp ; <<4 x i32>> [#uses=1]
%tmp7 = add <4 x i32> %tmp57, %tmp39 ; <<4 x i32>> [#uses=1]
tail call void @llvm.arm.neon.vst2.v4i32(i8* %tmp8, <4 x i32> %tmp6, <4 x i32> %tmp7, i32 1)
ret void
return2:
; CHECK: %return2
; CHECK: vadd.i32
; CHECK: vorr {{q[0-9]+}}, {{q[0-9]+}}
; CHECK-NOT: vmov
; CHECK: vst2.32 {d{{[0-9]+}}, d{{[0-9]+}}, d{{[0-9]+}}, d{{[0-9]+}}}
%tmp100 = extractvalue %struct.__neon_int32x4x2_t %tmp2, 0 ; <<4 x i32>> [#uses=1]
%tmp101 = extractvalue %struct.__neon_int32x4x2_t %tmp5, 1 ; <<4 x i32>> [#uses=1]
%tmp102 = add <4 x i32> %tmp100, %tmp101 ; <<4 x i32>> [#uses=1]
tail call void @llvm.arm.neon.vst2.v4i32(i8* %tmp8, <4 x i32> %tmp102, <4 x i32> %tmp101, i32 1)
call void @llvm.trap()
unreachable
}
define <8 x i16> @t5(i16* %A, <8 x i16>* %B) nounwind {
; CHECK: t5:
; CHECK: vldmia
; How can FileCheck match Q and D registers? We need a lisp interpreter.
; CHECK: vorr {{q[0-9]+}}, {{q[0-9]+}}, {{q[0-9]+}}
; CHECK-NOT: vmov
; CHECK: vld2.16 {d{{[0-9]+}}[1], d{{[0-9]+}}[1]}, [r0]
; CHECK-NOT: vmov
; CHECK: vadd.i16
%tmp0 = bitcast i16* %A to i8* ; <i8*> [#uses=1]
%tmp1 = load <8 x i16>* %B ; <<8 x i16>> [#uses=2]
%tmp2 = call %struct.__neon_int16x8x2_t @llvm.arm.neon.vld2lane.v8i16(i8* %tmp0, <8 x i16> %tmp1, <8 x i16> %tmp1, i32 1, i32 1) ; <%struct.__neon_int16x8x2_t> [#uses=2]
%tmp3 = extractvalue %struct.__neon_int16x8x2_t %tmp2, 0 ; <<8 x i16>> [#uses=1]
%tmp4 = extractvalue %struct.__neon_int16x8x2_t %tmp2, 1 ; <<8 x i16>> [#uses=1]
%tmp5 = add <8 x i16> %tmp3, %tmp4 ; <<8 x i16>> [#uses=1]
ret <8 x i16> %tmp5
}
define <8 x i8> @t6(i8* %A, <8 x i8>* %B) nounwind {
; CHECK: t6:
; CHECK: vldr
; CHECK: vorr d[[D0:[0-9]+]], d[[D1:[0-9]+]]
; CHECK-NEXT: vld2.8 {d[[D1]][1], d[[D0]][1]}
%tmp1 = load <8 x i8>* %B ; <<8 x i8>> [#uses=2]
%tmp2 = call %struct.__neon_int8x8x2_t @llvm.arm.neon.vld2lane.v8i8(i8* %A, <8 x i8> %tmp1, <8 x i8> %tmp1, i32 1, i32 1) ; <%struct.__neon_int8x8x2_t> [#uses=2]
%tmp3 = extractvalue %struct.__neon_int8x8x2_t %tmp2, 0 ; <<8 x i8>> [#uses=1]
%tmp4 = extractvalue %struct.__neon_int8x8x2_t %tmp2, 1 ; <<8 x i8>> [#uses=1]
%tmp5 = add <8 x i8> %tmp3, %tmp4 ; <<8 x i8>> [#uses=1]
ret <8 x i8> %tmp5
}
define void @t7(i32* %iptr, i32* %optr) nounwind {
entry:
; CHECK: t7:
; CHECK: vld2.32
; CHECK: vst2.32
; CHECK: vld1.32 {d{{[0-9]+}}, d{{[0-9]+}}},
; CHECK: vorr q[[Q0:[0-9]+]], q[[Q1:[0-9]+]], q[[Q1:[0-9]+]]
; CHECK-NOT: vmov
; CHECK: vuzp.32 q[[Q1]], q[[Q0]]
; CHECK: vst1.32
%0 = bitcast i32* %iptr to i8* ; <i8*> [#uses=2]
%1 = tail call %struct.__neon_int32x4x2_t @llvm.arm.neon.vld2.v4i32(i8* %0, i32 1) ; <%struct.__neon_int32x4x2_t> [#uses=2]
%tmp57 = extractvalue %struct.__neon_int32x4x2_t %1, 0 ; <<4 x i32>> [#uses=1]
%tmp60 = extractvalue %struct.__neon_int32x4x2_t %1, 1 ; <<4 x i32>> [#uses=1]
%2 = bitcast i32* %optr to i8* ; <i8*> [#uses=2]
tail call void @llvm.arm.neon.vst2.v4i32(i8* %2, <4 x i32> %tmp57, <4 x i32> %tmp60, i32 1)
%3 = tail call <4 x i32> @llvm.arm.neon.vld1.v4i32(i8* %0, i32 1) ; <<4 x i32>> [#uses=1]
%4 = shufflevector <4 x i32> %3, <4 x i32> undef, <4 x i32> <i32 0, i32 2, i32 0, i32 2> ; <<4 x i32>> [#uses=1]
tail call void @llvm.arm.neon.vst1.v4i32(i8* %2, <4 x i32> %4, i32 1)
ret void
}
; PR7156
define arm_aapcs_vfpcc i32 @t8() nounwind {
; CHECK: t8:
; CHECK: vrsqrte.f32 q8, q8
bb.nph55.bb.nph55.split_crit_edge:
br label %bb3
bb3: ; preds = %bb3, %bb.nph55.bb.nph55.split_crit_edge
br i1 undef, label %bb5, label %bb3
bb5: ; preds = %bb3
br label %bb.i25
bb.i25: ; preds = %bb.i25, %bb5
%0 = shufflevector <2 x float> undef, <2 x float> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3> ; <<4 x float>> [#uses=1]
%1 = call <4 x float> @llvm.arm.neon.vrsqrte.v4f32(<4 x float> %0) nounwind ; <<4 x float>> [#uses=1]
%2 = fmul <4 x float> %1, undef ; <<4 x float>> [#uses=1]
%3 = fmul <4 x float> undef, %2 ; <<4 x float>> [#uses=1]
%tmp26.i = bitcast <4 x float> %3 to <2 x double> ; <<2 x double>> [#uses=1]
%4 = extractelement <2 x double> %tmp26.i, i32 0 ; <double> [#uses=1]
%5 = bitcast double %4 to <2 x float> ; <<2 x float>> [#uses=1]
%6 = extractelement <2 x float> %5, i32 1 ; <float> [#uses=1]
store float %6, float* undef, align 4
br i1 undef, label %bb6, label %bb.i25
bb6: ; preds = %bb.i25
br i1 undef, label %bb7, label %bb14
bb7: ; preds = %bb6
br label %bb.i49
bb.i49: ; preds = %bb.i49, %bb7
br i1 undef, label %bb.i19, label %bb.i49
bb.i19: ; preds = %bb.i19, %bb.i49
br i1 undef, label %exit, label %bb.i19
exit: ; preds = %bb.i19
unreachable
bb14: ; preds = %bb6
ret i32 0
}
%0 = type { %1, %1, %1, %1 }
%1 = type { %2 }
%2 = type { <4 x float> }
%3 = type { %0, %1 }
; PR7157
define arm_aapcs_vfpcc float @t9(%0* nocapture, %3* nocapture) nounwind {
; CHECK: t9:
; CHECK: vldr
; CHECK-NOT: vmov d{{.*}}, d16
; CHECK: vmov.i32 d17
; CHECK-NEXT: vstmia r0, {d16, d17}
; CHECK-NEXT: vstmia r0, {d16, d17}
%3 = bitcast double 0.000000e+00 to <2 x float> ; <<2 x float>> [#uses=2]
%4 = shufflevector <2 x float> %3, <2 x float> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3> ; <<4 x float>> [#uses=1]
store <4 x float> %4, <4 x float>* undef, align 16
%5 = shufflevector <2 x float> %3, <2 x float> zeroinitializer, <4 x i32> <i32 0, i32 1, i32 2, i32 3> ; <<4 x float>> [#uses=1]
store <4 x float> %5, <4 x float>* undef, align 16
br label %8
; <label>:6 ; preds = %8
br label %7
; <label>:7 ; preds = %6
br label %8
; <label>:8 ; preds = %7, %2
br label %6
; <label>:9 ; preds = %8
ret float undef
; <label>:10 ; preds = %6
ret float 9.990000e+02
}
; PR7162
define arm_aapcs_vfpcc i32 @t10() nounwind {
entry:
; CHECK: t10:
; CHECK: vmov.i32 q[[Q0:[0-9]+]], #0x3f000000
; CHECK: vmul.f32 q8, q8, d0[0]
; CHECK: vadd.f32 q8, q8, q8
%0 = shufflevector <4 x float> zeroinitializer, <4 x float> undef, <4 x i32> zeroinitializer ; <<4 x float>> [#uses=1]
%1 = insertelement <4 x float> %0, float undef, i32 1 ; <<4 x float>> [#uses=1]
%2 = insertelement <4 x float> %1, float undef, i32 2 ; <<4 x float>> [#uses=1]
%3 = insertelement <4 x float> %2, float undef, i32 3 ; <<4 x float>> [#uses=1]
%tmp54.i = bitcast <4 x float> %3 to <2 x double> ; <<2 x double>> [#uses=1]
%4 = extractelement <2 x double> %tmp54.i, i32 1 ; <double> [#uses=1]
%5 = bitcast double %4 to <2 x float> ; <<2 x float>> [#uses=1]
%6 = shufflevector <2 x float> %5, <2 x float> undef, <4 x i32> zeroinitializer ; <<4 x float>> [#uses=1]
%7 = fmul <4 x float> undef, %6 ; <<4 x float>> [#uses=1]
%8 = fadd <4 x float> %7, undef ; <<4 x float>> [#uses=1]
%9 = fadd <4 x float> %8, undef ; <<4 x float>> [#uses=1]
%10 = shufflevector <4 x float> undef, <4 x float> %9, <4 x i32> <i32 0, i32 1, i32 2, i32 7> ; <<4 x float>> [#uses=1]
%11 = fmul <4 x float> %10, <float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01> ; <<4 x float>> [#uses=1]
%12 = shufflevector <4 x float> %11, <4 x float> undef, <4 x i32> <i32 3, i32 undef, i32 undef, i32 undef> ; <<4 x float>> [#uses=1]
%13 = shufflevector <4 x float> %12, <4 x float> undef, <4 x i32> zeroinitializer ; <<4 x float>> [#uses=1]
%14 = fmul <4 x float> %13, undef ; <<4 x float>> [#uses=1]
%15 = fadd <4 x float> undef, %14 ; <<4 x float>> [#uses=1]
%16 = shufflevector <4 x float> undef, <4 x float> %15, <4 x i32> <i32 0, i32 1, i32 6, i32 3> ; <<4 x float>> [#uses=1]
%17 = fmul <4 x float> %16, undef ; <<4 x float>> [#uses=1]
%18 = extractelement <4 x float> %17, i32 2 ; <float> [#uses=1]
store float %18, float* undef, align 4
br i1 undef, label %exit, label %bb14
exit: ; preds = %bb.i19
unreachable
bb14: ; preds = %bb6
ret i32 0
}
; This test crashes the coalescer because live variables were not updated properly.
define <8 x i8> @t11(i8* %A1, i8* %A2, i8* %A3, i8* %A4, i8* %A5, i8* %A6, i8* %A7, i8* %A8, i8* %B) nounwind {
%tmp1d = call %struct.__neon_int8x8x3_t @llvm.arm.neon.vld3.v8i8(i8* %A4, i32 1) ; <%struct.__neon_int8x8x3_t> [#uses=1]
%tmp2d = extractvalue %struct.__neon_int8x8x3_t %tmp1d, 0 ; <<8 x i8>> [#uses=1]
%tmp1f = call %struct.__neon_int8x8x3_t @llvm.arm.neon.vld3.v8i8(i8* %A6, i32 1) ; <%struct.__neon_int8x8x3_t> [#uses=1]
%tmp2f = extractvalue %struct.__neon_int8x8x3_t %tmp1f, 0 ; <<8 x i8>> [#uses=1]
%tmp2bd = add <8 x i8> zeroinitializer, %tmp2d ; <<8 x i8>> [#uses=1]
%tmp2abcd = mul <8 x i8> zeroinitializer, %tmp2bd ; <<8 x i8>> [#uses=1]
%tmp2ef = sub <8 x i8> zeroinitializer, %tmp2f ; <<8 x i8>> [#uses=1]
%tmp2efgh = mul <8 x i8> %tmp2ef, undef ; <<8 x i8>> [#uses=2]
call void @llvm.arm.neon.vst3.v8i8(i8* %A2, <8 x i8> undef, <8 x i8> undef, <8 x i8> %tmp2efgh, i32 1)
%tmp2 = sub <8 x i8> %tmp2efgh, %tmp2abcd ; <<8 x i8>> [#uses=1]
%tmp7 = mul <8 x i8> undef, %tmp2 ; <<8 x i8>> [#uses=1]
tail call void @llvm.arm.neon.vst3.v8i8(i8* %B, <8 x i8> undef, <8 x i8> undef, <8 x i8> %tmp7, i32 1)
ret <8 x i8> undef
}
declare <4 x i32> @llvm.arm.neon.vld1.v4i32(i8*, i32) nounwind readonly
declare <8 x i16> @llvm.arm.neon.vld1.v8i16(i8*, i32) nounwind readonly
declare <4 x i16> @llvm.arm.neon.vshiftn.v4i16(<4 x i32>, <4 x i32>) nounwind readnone
declare void @llvm.arm.neon.vst1.v4i32(i8*, <4 x i32>, i32) nounwind
declare void @llvm.arm.neon.vst1.v8i16(i8*, <8 x i16>, i32) nounwind
declare void @llvm.arm.neon.vst3.v8i8(i8*, <8 x i8>, <8 x i8>, <8 x i8>, i32)
nounwind
declare %struct.__neon_int8x8x3_t @llvm.arm.neon.vld3.v8i8(i8*, i32) nounwind readonly
declare %struct.__neon_int32x4x2_t @llvm.arm.neon.vld2.v4i32(i8*, i32) nounwind readonly
declare %struct.__neon_int8x8x2_t @llvm.arm.neon.vld2lane.v8i8(i8*, <8 x i8>, <8 x i8>, i32, i32) nounwind readonly
declare %struct.__neon_int16x8x2_t @llvm.arm.neon.vld2lane.v8i16(i8*, <8 x i16>, <8 x i16>, i32, i32) nounwind readonly
declare void @llvm.arm.neon.vst2.v4i32(i8*, <4 x i32>, <4 x i32>, i32) nounwind
declare <4 x float> @llvm.arm.neon.vrsqrte.v4f32(<4 x float>) nounwind readnone
declare void @llvm.trap() nounwind
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