tail-reduce.ll
6.8 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
; RUN: opt -mtriple=thumbv8.1m.main -mve-tail-predication -disable-mve-tail-predication=false -mattr=+mve %s -S -o - | FileCheck %s
; CHECK-LABEL: reduction_i32
; CHECK: phi i32 [ 0, %entry ]
; CHECK: phi <8 x i16> [ zeroinitializer, %entry ]
; CHECK: phi i32
; CHECK: [[PHI:%[^ ]+]] = phi i32 [ %N, %entry ], [ [[ELEMS:%[^ ]+]], %vector.body ]
; CHECK: [[VCTP:%[^ ]+]] = call <8 x i1> @llvm.arm.mve.vctp16(i32 [[PHI]])
; CHECK: [[ELEMS]] = sub i32 [[PHI]], 8
; CHECK: call <8 x i16> @llvm.masked.load.v8i16.p0v8i16(<8 x i16>* %tmp4, i32 4, <8 x i1> [[VCTP]], <8 x i16> undef)
; CHECK: call <8 x i16> @llvm.masked.load.v8i16.p0v8i16(<8 x i16>* %tmp6, i32 4, <8 x i1> [[VCTP]], <8 x i16> undef)
define i16 @reduction_i32(i16* nocapture readonly %A, i16* nocapture readonly %B, i32 %N) {
entry:
%tmp = add i32 %N, -1
%n.rnd.up = add nuw nsw i32 %tmp, 8
%n.vec = and i32 %n.rnd.up, -8
%broadcast.splatinsert1 = insertelement <8 x i32> undef, i32 %tmp, i32 0
%broadcast.splat2 = shufflevector <8 x i32> %broadcast.splatinsert1, <8 x i32> undef, <8 x i32> zeroinitializer
%0 = add i32 %n.vec, -8
%1 = lshr i32 %0, 3
%2 = add nuw nsw i32 %1, 1
call void @llvm.set.loop.iterations.i32(i32 %2)
br label %vector.body
vector.body: ; preds = %vector.body, %entry
%index = phi i32 [ 0, %entry ], [ %index.next, %vector.body ]
%vec.phi = phi <8 x i16> [ zeroinitializer, %entry ], [ %tmp8, %vector.body ]
%3 = phi i32 [ %2, %entry ], [ %4, %vector.body ]
%broadcast.splatinsert = insertelement <8 x i32> undef, i32 %index, i32 0
%broadcast.splat = shufflevector <8 x i32> %broadcast.splatinsert, <8 x i32> undef, <8 x i32> zeroinitializer
%induction = add <8 x i32> %broadcast.splat, <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
%tmp2 = getelementptr inbounds i16, i16* %A, i32 %index
%tmp3 = icmp ule <8 x i32> %induction, %broadcast.splat2
%tmp4 = bitcast i16* %tmp2 to <8 x i16>*
%wide.masked.load = call <8 x i16> @llvm.masked.load.v8i16.p0v8i16(<8 x i16>* %tmp4, i32 4, <8 x i1> %tmp3, <8 x i16> undef)
%tmp5 = getelementptr inbounds i16, i16* %B, i32 %index
%tmp6 = bitcast i16* %tmp5 to <8 x i16>*
%wide.masked.load3 = call <8 x i16> @llvm.masked.load.v8i16.p0v8i16(<8 x i16>* %tmp6, i32 4, <8 x i1> %tmp3, <8 x i16> undef)
%tmp7 = add <8 x i16> %wide.masked.load, %vec.phi
%tmp8 = add <8 x i16> %tmp7, %wide.masked.load3
%index.next = add nuw nsw i32 %index, 8
%4 = call i32 @llvm.loop.decrement.reg.i32.i32.i32(i32 %3, i32 1)
%5 = icmp ne i32 %4, 0
br i1 %5, label %vector.body, label %middle.block
middle.block: ; preds = %vector.body
%vec.phi.lcssa = phi <8 x i16> [ %vec.phi, %vector.body ]
%.lcssa3 = phi <8 x i1> [ %tmp3, %vector.body ]
%.lcssa = phi <8 x i16> [ %tmp8, %vector.body ]
%tmp10 = select <8 x i1> %.lcssa3, <8 x i16> %.lcssa, <8 x i16> %vec.phi.lcssa
%rdx.shuf = shufflevector <8 x i16> %tmp10, <8 x i16> undef, <8 x i32> <i32 4, i32 5, i32 6, i32 7, i32 undef, i32 undef, i32 undef, i32 undef>
%bin.rdx = add <8 x i16> %rdx.shuf, %tmp10
%rdx.shuf4 = shufflevector <8 x i16> %bin.rdx, <8 x i16> undef, <8 x i32> <i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
%bin.rdx5 = add <8 x i16> %rdx.shuf4, %bin.rdx
%rdx.shuf6 = shufflevector <8 x i16> %bin.rdx5, <8 x i16> undef, <8 x i32> <i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
%bin.rdx7 = add <8 x i16> %rdx.shuf6, %bin.rdx5
%tmp11 = extractelement <8 x i16> %bin.rdx7, i32 0
ret i16 %tmp11
}
; CHECK-LABEL: reduction_i32_with_scalar
; CHECK: phi i32 [ 0, %entry ]
; CHECK: phi <8 x i16> [ zeroinitializer, %entry ]
; CHECK: phi i32
; CHECK: [[PHI:%[^ ]+]] = phi i32 [ %N, %entry ], [ [[ELEMS:%[^ ]+]], %vector.body ]
; CHECK: [[VCTP:%[^ ]+]] = call <8 x i1> @llvm.arm.mve.vctp16(i32 [[PHI]])
; CHECK: [[ELEMS]] = sub i32 [[PHI]], 8
; CHECK: call <8 x i16> @llvm.masked.load.v8i16.p0v8i16(<8 x i16>* %tmp4, i32 4, <8 x i1> [[VCTP]], <8 x i16> undef)
define i16 @reduction_i32_with_scalar(i16* nocapture readonly %A, i16 %B, i32 %N) local_unnamed_addr {
entry:
%tmp = add i32 %N, -1
%n.rnd.up = add nuw nsw i32 %tmp, 8
%n.vec = and i32 %n.rnd.up, -8
%broadcast.splatinsert1 = insertelement <8 x i32> undef, i32 %tmp, i32 0
%broadcast.splat2 = shufflevector <8 x i32> %broadcast.splatinsert1, <8 x i32> undef, <8 x i32> zeroinitializer
%broadcast.splatinsert3 = insertelement <8 x i16> undef, i16 %B, i32 0
%broadcast.splat4 = shufflevector <8 x i16> %broadcast.splatinsert3, <8 x i16> undef, <8 x i32> zeroinitializer
%0 = add i32 %n.vec, -8
%1 = lshr i32 %0, 3
%2 = add nuw nsw i32 %1, 1
call void @llvm.set.loop.iterations.i32(i32 %2)
br label %vector.body
vector.body: ; preds = %vector.body, %entry
%index = phi i32 [ 0, %entry ], [ %index.next, %vector.body ]
%vec.phi = phi <8 x i16> [ zeroinitializer, %entry ], [ %tmp6, %vector.body ]
%3 = phi i32 [ %2, %entry ], [ %4, %vector.body ]
%broadcast.splatinsert = insertelement <8 x i32> undef, i32 %index, i32 0
%broadcast.splat = shufflevector <8 x i32> %broadcast.splatinsert, <8 x i32> undef, <8 x i32> zeroinitializer
%induction = add <8 x i32> %broadcast.splat, <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
%tmp2 = getelementptr inbounds i16, i16* %A, i32 %index
%tmp3 = icmp ule <8 x i32> %induction, %broadcast.splat2
%tmp4 = bitcast i16* %tmp2 to <8 x i16>*
%wide.masked.load = call <8 x i16> @llvm.masked.load.v8i16.p0v8i16(<8 x i16>* %tmp4, i32 4, <8 x i1> %tmp3, <8 x i16> undef)
%tmp5 = add <8 x i16> %vec.phi, %broadcast.splat4
%tmp6 = add <8 x i16> %tmp5, %wide.masked.load
%index.next = add nuw nsw i32 %index, 8
%4 = call i32 @llvm.loop.decrement.reg.i32.i32.i32(i32 %3, i32 1)
%5 = icmp ne i32 %4, 0
br i1 %5, label %vector.body, label %middle.block
middle.block: ; preds = %vector.body
%tmp8 = select <8 x i1> %tmp3, <8 x i16> %tmp6, <8 x i16> %vec.phi
%rdx.shuf = shufflevector <8 x i16> %tmp8, <8 x i16> undef, <8 x i32> <i32 4, i32 5, i32 6, i32 7, i32 undef, i32 undef, i32 undef, i32 undef>
%bin.rdx = add <8 x i16> %rdx.shuf, %tmp8
%rdx.shuf5 = shufflevector <8 x i16> %bin.rdx, <8 x i16> undef, <8 x i32> <i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
%bin.rdx6 = add <8 x i16> %rdx.shuf5, %bin.rdx
%rdx.shuf7 = shufflevector <8 x i16> %bin.rdx6, <8 x i16> undef, <8 x i32> <i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
%bin.rdx8 = add <8 x i16> %rdx.shuf7, %bin.rdx6
%tmp9 = extractelement <8 x i16> %bin.rdx8, i32 0
ret i16 %tmp9
}
declare <8 x i16> @llvm.masked.load.v8i16.p0v8i16(<8 x i16>*, i32 immarg, <8 x i1>, <8 x i16>)
declare void @llvm.set.loop.iterations.i32(i32)
declare i32 @llvm.loop.decrement.reg.i32.i32.i32(i32, i32)