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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -instcombine -S < %s | FileCheck %s
define <4 x float> @good1(float %arg) {
; CHECK-LABEL: @good1(
; CHECK-NEXT: [[T:%.*]] = insertelement <4 x float> undef, float [[ARG:%.*]], i32 0
; CHECK-NEXT: [[T6:%.*]] = shufflevector <4 x float> [[T]], <4 x float> undef, <4 x i32> zeroinitializer
; CHECK-NEXT: ret <4 x float> [[T6]]
;
%t = insertelement <4 x float> undef, float %arg, i32 0
%t4 = insertelement <4 x float> %t, float %arg, i32 1
%t5 = insertelement <4 x float> %t4, float %arg, i32 2
%t6 = insertelement <4 x float> %t5, float %arg, i32 3
ret <4 x float> %t6
}
define <4 x float> @good2(float %arg) {
; CHECK-LABEL: @good2(
; CHECK-NEXT: [[TMP1:%.*]] = insertelement <4 x float> undef, float [[ARG:%.*]], i32 0
; CHECK-NEXT: [[T6:%.*]] = shufflevector <4 x float> [[TMP1]], <4 x float> undef, <4 x i32> zeroinitializer
; CHECK-NEXT: ret <4 x float> [[T6]]
;
%t = insertelement <4 x float> undef, float %arg, i32 1
%t4 = insertelement <4 x float> %t, float %arg, i32 2
%t5 = insertelement <4 x float> %t4, float %arg, i32 0
%t6 = insertelement <4 x float> %t5, float %arg, i32 3
ret <4 x float> %t6
}
define <4 x float> @good3(float %arg) {
; CHECK-LABEL: @good3(
; CHECK-NEXT: [[T:%.*]] = insertelement <4 x float> undef, float [[ARG:%.*]], i32 0
; CHECK-NEXT: [[T6:%.*]] = shufflevector <4 x float> [[T]], <4 x float> undef, <4 x i32> zeroinitializer
; CHECK-NEXT: ret <4 x float> [[T6]]
;
%t = insertelement <4 x float> zeroinitializer, float %arg, i32 0
%t4 = insertelement <4 x float> %t, float %arg, i32 1
%t5 = insertelement <4 x float> %t4, float %arg, i32 2
%t6 = insertelement <4 x float> %t5, float %arg, i32 3
ret <4 x float> %t6
}
define <4 x float> @good4(float %arg) {
; CHECK-LABEL: @good4(
; CHECK-NEXT: [[T:%.*]] = insertelement <4 x float> undef, float [[ARG:%.*]], i32 0
; CHECK-NEXT: [[TMP1:%.*]] = fadd <4 x float> [[T]], [[T]]
; CHECK-NEXT: [[T7:%.*]] = shufflevector <4 x float> [[TMP1]], <4 x float> undef, <4 x i32> zeroinitializer
; CHECK-NEXT: ret <4 x float> [[T7]]
;
%t = insertelement <4 x float> zeroinitializer, float %arg, i32 0
%t4 = insertelement <4 x float> %t, float %arg, i32 1
%t5 = insertelement <4 x float> %t4, float %arg, i32 2
%t6 = insertelement <4 x float> %t5, float %arg, i32 3
%t7 = fadd <4 x float> %t6, %t6
ret <4 x float> %t7
}
define <4 x float> @good5(float %v) {
; CHECK-LABEL: @good5(
; CHECK-NEXT: [[INS1:%.*]] = insertelement <4 x float> undef, float [[V:%.*]], i32 0
; CHECK-NEXT: [[A1:%.*]] = fadd <4 x float> [[INS1]], [[INS1]]
; CHECK-NEXT: [[INS4:%.*]] = shufflevector <4 x float> [[INS1]], <4 x float> undef, <4 x i32> zeroinitializer
; CHECK-NEXT: [[RES:%.*]] = fadd <4 x float> [[A1]], [[INS4]]
; CHECK-NEXT: ret <4 x float> [[RES]]
;
%ins1 = insertelement <4 x float> undef, float %v, i32 0
%a1 = fadd <4 x float> %ins1, %ins1
%ins2 = insertelement<4 x float> %ins1, float %v, i32 1
%ins3 = insertelement<4 x float> %ins2, float %v, i32 2
%ins4 = insertelement<4 x float> %ins3, float %v, i32 3
%res = fadd <4 x float> %a1, %ins4
ret <4 x float> %res
}
; The insert is changed to allow the canonical shuffle-splat pattern from element 0.
define <4 x float> @splat_undef1(float %arg) {
; CHECK-LABEL: @splat_undef1(
; CHECK-NEXT: [[TMP1:%.*]] = insertelement <4 x float> undef, float [[ARG:%.*]], i32 0
; CHECK-NEXT: [[T6:%.*]] = shufflevector <4 x float> [[TMP1]], <4 x float> undef, <4 x i32> <i32 undef, i32 0, i32 0, i32 0>
; CHECK-NEXT: ret <4 x float> [[T6]]
;
%t = insertelement <4 x float> undef, float %arg, i32 1
%t4 = insertelement <4 x float> %t, float %arg, i32 1
%t5 = insertelement <4 x float> %t4, float %arg, i32 2
%t6 = insertelement <4 x float> %t5, float %arg, i32 3
ret <4 x float> %t6
}
; Re-uses the existing first insertelement.
define <4 x float> @splat_undef2(float %arg) {
; CHECK-LABEL: @splat_undef2(
; CHECK-NEXT: [[T:%.*]] = insertelement <4 x float> undef, float [[ARG:%.*]], i32 0
; CHECK-NEXT: [[T6:%.*]] = shufflevector <4 x float> [[T]], <4 x float> undef, <4 x i32> <i32 0, i32 undef, i32 0, i32 0>
; CHECK-NEXT: ret <4 x float> [[T6]]
;
%t = insertelement <4 x float> undef, float %arg, i32 0
%t5 = insertelement <4 x float> %t, float %arg, i32 2
%t6 = insertelement <4 x float> %t5, float %arg, i32 3
ret <4 x float> %t6
}
define <4 x float> @bad3(float %arg, float %arg2) {
; CHECK-LABEL: @bad3(
; CHECK-NEXT: [[T:%.*]] = insertelement <4 x float> undef, float [[ARG:%.*]], i32 0
; CHECK-NEXT: [[T4:%.*]] = insertelement <4 x float> [[T]], float [[ARG2:%.*]], i32 1
; CHECK-NEXT: [[T5:%.*]] = insertelement <4 x float> [[T4]], float [[ARG]], i32 2
; CHECK-NEXT: [[T6:%.*]] = insertelement <4 x float> [[T5]], float [[ARG]], i32 3
; CHECK-NEXT: ret <4 x float> [[T6]]
;
%t = insertelement <4 x float> undef, float %arg, i32 0
%t4 = insertelement <4 x float> %t, float %arg2, i32 1
%t5 = insertelement <4 x float> %t4, float %arg, i32 2
%t6 = insertelement <4 x float> %t5, float %arg, i32 3
ret <4 x float> %t6
}
define <1 x float> @bad4(float %arg) {
; CHECK-LABEL: @bad4(
; CHECK-NEXT: [[T:%.*]] = insertelement <1 x float> undef, float [[ARG:%.*]], i32 0
; CHECK-NEXT: ret <1 x float> [[T]]
;
%t = insertelement <1 x float> undef, float %arg, i32 0
ret <1 x float> %t
}
; Multiple undef elements are ok.
; TODO: Multiple uses triggers the transform at %t4, but we should sink/scalarize/CSE the splats?
define <4 x float> @splat_undef3(float %arg) {
; CHECK-LABEL: @splat_undef3(
; CHECK-NEXT: [[T:%.*]] = insertelement <4 x float> undef, float [[ARG:%.*]], i32 0
; CHECK-NEXT: [[T4:%.*]] = shufflevector <4 x float> [[T]], <4 x float> undef, <4 x i32> <i32 0, i32 0, i32 undef, i32 undef>
; CHECK-NEXT: [[T6:%.*]] = shufflevector <4 x float> [[T]], <4 x float> undef, <4 x i32> zeroinitializer
; CHECK-NEXT: [[T7:%.*]] = fadd <4 x float> [[T6]], [[T4]]
; CHECK-NEXT: ret <4 x float> [[T7]]
;
%t = insertelement <4 x float> undef, float %arg, i32 0
%t4 = insertelement <4 x float> %t, float %arg, i32 1
%t5 = insertelement <4 x float> %t4, float %arg, i32 2
%t6 = insertelement <4 x float> %t5, float %arg, i32 3
%t7 = fadd <4 x float> %t6, %t4
ret <4 x float> %t7
}
define <4 x float> @bad6(float %arg, i32 %k) {
; CHECK-LABEL: @bad6(
; CHECK-NEXT: [[T:%.*]] = insertelement <4 x float> undef, float [[ARG:%.*]], i32 0
; CHECK-NEXT: [[T4:%.*]] = insertelement <4 x float> [[T]], float [[ARG]], i32 1
; CHECK-NEXT: [[T5:%.*]] = insertelement <4 x float> [[T4]], float [[ARG]], i32 [[K:%.*]]
; CHECK-NEXT: [[T6:%.*]] = insertelement <4 x float> [[T5]], float [[ARG]], i32 3
; CHECK-NEXT: ret <4 x float> [[T6]]
;
%t = insertelement <4 x float> undef, float %arg, i32 0
%t4 = insertelement <4 x float> %t, float %arg, i32 1
%t5 = insertelement <4 x float> %t4, float %arg, i32 %k
%t6 = insertelement <4 x float> %t5, float %arg, i32 3
ret <4 x float> %t6
}
define <4 x float> @bad7(float %v) {
; CHECK-LABEL: @bad7(
; CHECK-NEXT: [[INS1:%.*]] = insertelement <4 x float> undef, float [[V:%.*]], i32 1
; CHECK-NEXT: [[A1:%.*]] = fadd <4 x float> [[INS1]], [[INS1]]
; CHECK-NEXT: [[INS2:%.*]] = insertelement <4 x float> [[INS1]], float [[V]], i32 2
; CHECK-NEXT: [[INS3:%.*]] = insertelement <4 x float> [[INS2]], float [[V]], i32 3
; CHECK-NEXT: [[INS4:%.*]] = insertelement <4 x float> [[INS3]], float [[V]], i32 0
; CHECK-NEXT: [[RES:%.*]] = fadd <4 x float> [[A1]], [[INS4]]
; CHECK-NEXT: ret <4 x float> [[RES]]
;
%ins1 = insertelement <4 x float> undef, float %v, i32 1
%a1 = fadd <4 x float> %ins1, %ins1
%ins2 = insertelement<4 x float> %ins1, float %v, i32 2
%ins3 = insertelement<4 x float> %ins2, float %v, i32 3
%ins4 = insertelement<4 x float> %ins3, float %v, i32 0
%res = fadd <4 x float> %a1, %ins4
ret <4 x float> %res
}
|
