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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=aarch64-unknown-unknown < %s | FileCheck %s --check-prefixes=CHECK,CHECK-SD
; RUN: llc -mtriple=aarch64-unknown-unknown < %s -global-isel -global-isel-abort=2 2>&1 | FileCheck %s --check-prefixes=CHECK,CHECK-GI
; CHECK-GI: warning: Instruction selection used fallback path for splat_fdiv_nxv4f32
; CHECK-GI-NEXT: warning: Instruction selection used fallback path for splat_three_fdiv_nxv4f32
; CHECK-GI-NEXT: warning: Instruction selection used fallback path for splat_fdiv_nxv2f64
; CHECK-GI-NEXT: warning: Instruction selection used fallback path for splat_two_fdiv_nxv2f64
; Following test cases check:
; a / D; b / D; c / D;
; =>
; recip = 1.0 / D; a * recip; b * recip; c * recip;
define void @three_fdiv_float(float %D, float %a, float %b, float %c) #0 {
; CHECK-SD-LABEL: three_fdiv_float:
; CHECK-SD: // %bb.0:
; CHECK-SD-NEXT: fmov s4, #1.00000000
; CHECK-SD-NEXT: fdiv s4, s4, s0
; CHECK-SD-NEXT: fmul s0, s1, s4
; CHECK-SD-NEXT: fmul s1, s2, s4
; CHECK-SD-NEXT: fmul s2, s3, s4
; CHECK-SD-NEXT: b foo_3f
;
; CHECK-GI-LABEL: three_fdiv_float:
; CHECK-GI: // %bb.0:
; CHECK-GI-NEXT: fdiv s4, s1, s0
; CHECK-GI-NEXT: fdiv s1, s2, s0
; CHECK-GI-NEXT: fdiv s2, s3, s0
; CHECK-GI-NEXT: fmov s0, s4
; CHECK-GI-NEXT: b foo_3f
%div = fdiv float %a, %D
%div1 = fdiv float %b, %D
%div2 = fdiv float %c, %D
tail call void @foo_3f(float %div, float %div1, float %div2)
ret void
}
define void @three_fdiv_double(double %D, double %a, double %b, double %c) #0 {
; CHECK-SD-LABEL: three_fdiv_double:
; CHECK-SD: // %bb.0:
; CHECK-SD-NEXT: fmov d4, #1.00000000
; CHECK-SD-NEXT: fdiv d4, d4, d0
; CHECK-SD-NEXT: fmul d0, d1, d4
; CHECK-SD-NEXT: fmul d1, d2, d4
; CHECK-SD-NEXT: fmul d2, d3, d4
; CHECK-SD-NEXT: b foo_3d
;
; CHECK-GI-LABEL: three_fdiv_double:
; CHECK-GI: // %bb.0:
; CHECK-GI-NEXT: fdiv d4, d1, d0
; CHECK-GI-NEXT: fdiv d1, d2, d0
; CHECK-GI-NEXT: fdiv d2, d3, d0
; CHECK-GI-NEXT: fmov d0, d4
; CHECK-GI-NEXT: b foo_3d
%div = fdiv double %a, %D
%div1 = fdiv double %b, %D
%div2 = fdiv double %c, %D
tail call void @foo_3d(double %div, double %div1, double %div2)
ret void
}
define void @three_fdiv_4xfloat(<4 x float> %D, <4 x float> %a, <4 x float> %b, <4 x float> %c) #0 {
; CHECK-SD-LABEL: three_fdiv_4xfloat:
; CHECK-SD: // %bb.0:
; CHECK-SD-NEXT: fmov v4.4s, #1.00000000
; CHECK-SD-NEXT: fdiv v4.4s, v4.4s, v0.4s
; CHECK-SD-NEXT: fmul v0.4s, v1.4s, v4.4s
; CHECK-SD-NEXT: fmul v1.4s, v2.4s, v4.4s
; CHECK-SD-NEXT: fmul v2.4s, v3.4s, v4.4s
; CHECK-SD-NEXT: b foo_3_4xf
;
; CHECK-GI-LABEL: three_fdiv_4xfloat:
; CHECK-GI: // %bb.0:
; CHECK-GI-NEXT: fdiv v4.4s, v1.4s, v0.4s
; CHECK-GI-NEXT: fdiv v1.4s, v2.4s, v0.4s
; CHECK-GI-NEXT: fdiv v2.4s, v3.4s, v0.4s
; CHECK-GI-NEXT: mov v0.16b, v4.16b
; CHECK-GI-NEXT: b foo_3_4xf
%div = fdiv <4 x float> %a, %D
%div1 = fdiv <4 x float> %b, %D
%div2 = fdiv <4 x float> %c, %D
tail call void @foo_3_4xf(<4 x float> %div, <4 x float> %div1, <4 x float> %div2)
ret void
}
define void @three_fdiv_2xdouble(<2 x double> %D, <2 x double> %a, <2 x double> %b, <2 x double> %c) #0 {
; CHECK-SD-LABEL: three_fdiv_2xdouble:
; CHECK-SD: // %bb.0:
; CHECK-SD-NEXT: fmov v4.2d, #1.00000000
; CHECK-SD-NEXT: fdiv v4.2d, v4.2d, v0.2d
; CHECK-SD-NEXT: fmul v0.2d, v1.2d, v4.2d
; CHECK-SD-NEXT: fmul v1.2d, v2.2d, v4.2d
; CHECK-SD-NEXT: fmul v2.2d, v3.2d, v4.2d
; CHECK-SD-NEXT: b foo_3_2xd
;
; CHECK-GI-LABEL: three_fdiv_2xdouble:
; CHECK-GI: // %bb.0:
; CHECK-GI-NEXT: fdiv v4.2d, v1.2d, v0.2d
; CHECK-GI-NEXT: fdiv v1.2d, v2.2d, v0.2d
; CHECK-GI-NEXT: fdiv v2.2d, v3.2d, v0.2d
; CHECK-GI-NEXT: mov v0.16b, v4.16b
; CHECK-GI-NEXT: b foo_3_2xd
%div = fdiv <2 x double> %a, %D
%div1 = fdiv <2 x double> %b, %D
%div2 = fdiv <2 x double> %c, %D
tail call void @foo_3_2xd(<2 x double> %div, <2 x double> %div1, <2 x double> %div2)
ret void
}
; Following test cases check we never combine two FDIVs if neither of them
; calculates a reciprocal.
define void @two_fdiv_float(float %D, float %a, float %b) #0 {
; CHECK-LABEL: two_fdiv_float:
; CHECK: // %bb.0:
; CHECK-NEXT: fdiv s3, s1, s0
; CHECK-NEXT: fdiv s1, s2, s0
; CHECK-NEXT: fmov s0, s3
; CHECK-NEXT: b foo_2f
%div = fdiv float %a, %D
%div1 = fdiv float %b, %D
tail call void @foo_2f(float %div, float %div1)
ret void
}
define void @two_fdiv_double(double %D, double %a, double %b) #0 {
; CHECK-LABEL: two_fdiv_double:
; CHECK: // %bb.0:
; CHECK-NEXT: fdiv d3, d1, d0
; CHECK-NEXT: fdiv d1, d2, d0
; CHECK-NEXT: fmov d0, d3
; CHECK-NEXT: b foo_2d
%div = fdiv double %a, %D
%div1 = fdiv double %b, %D
tail call void @foo_2d(double %div, double %div1)
ret void
}
define void @splat_three_fdiv_4xfloat(float %D, <4 x float> %a, <4 x float> %b, <4 x float> %c) #0 {
; CHECK-SD-LABEL: splat_three_fdiv_4xfloat:
; CHECK-SD: // %bb.0:
; CHECK-SD-NEXT: // kill: def $s0 killed $s0 def $q0
; CHECK-SD-NEXT: fmov v4.4s, #1.00000000
; CHECK-SD-NEXT: dup v0.4s, v0.s[0]
; CHECK-SD-NEXT: fdiv v4.4s, v4.4s, v0.4s
; CHECK-SD-NEXT: fmul v0.4s, v1.4s, v4.4s
; CHECK-SD-NEXT: fmul v1.4s, v2.4s, v4.4s
; CHECK-SD-NEXT: fmul v2.4s, v3.4s, v4.4s
; CHECK-SD-NEXT: b foo_3_4xf
;
; CHECK-GI-LABEL: splat_three_fdiv_4xfloat:
; CHECK-GI: // %bb.0:
; CHECK-GI-NEXT: // kill: def $s0 killed $s0 def $q0
; CHECK-GI-NEXT: dup v4.4s, v0.s[0]
; CHECK-GI-NEXT: fdiv v0.4s, v1.4s, v4.4s
; CHECK-GI-NEXT: fdiv v1.4s, v2.4s, v4.4s
; CHECK-GI-NEXT: fdiv v2.4s, v3.4s, v4.4s
; CHECK-GI-NEXT: b foo_3_4xf
%D.ins = insertelement <4 x float> poison, float %D, i64 0
%splat = shufflevector <4 x float> %D.ins, <4 x float> poison, <4 x i32> zeroinitializer
%div = fdiv <4 x float> %a, %splat
%div1 = fdiv <4 x float> %b, %splat
%div2 = fdiv <4 x float> %c, %splat
tail call void @foo_3_4xf(<4 x float> %div, <4 x float> %div1, <4 x float> %div2)
ret void
}
define <4 x float> @splat_fdiv_v4f32(float %D, <4 x float> %a) #1 {
; CHECK-SD-LABEL: splat_fdiv_v4f32:
; CHECK-SD: // %bb.0: // %entry
; CHECK-SD-NEXT: // kill: def $s0 killed $s0 def $q0
; CHECK-SD-NEXT: fmov v2.4s, #1.00000000
; CHECK-SD-NEXT: dup v0.4s, v0.s[0]
; CHECK-SD-NEXT: fdiv v0.4s, v2.4s, v0.4s
; CHECK-SD-NEXT: fmul v0.4s, v1.4s, v0.4s
; CHECK-SD-NEXT: ret
;
; CHECK-GI-LABEL: splat_fdiv_v4f32:
; CHECK-GI: // %bb.0: // %entry
; CHECK-GI-NEXT: // kill: def $s0 killed $s0 def $q0
; CHECK-GI-NEXT: dup v0.4s, v0.s[0]
; CHECK-GI-NEXT: fdiv v0.4s, v1.4s, v0.4s
; CHECK-GI-NEXT: ret
entry:
%D.ins = insertelement <4 x float> poison, float %D, i64 0
%splat = shufflevector <4 x float> %D.ins, <4 x float> poison, <4 x i32> zeroinitializer
%div = fdiv <4 x float> %a, %splat
ret <4 x float> %div
}
define <vscale x 4 x float> @splat_fdiv_nxv4f32(float %D, <vscale x 4 x float> %a) #1 {
; CHECK-LABEL: splat_fdiv_nxv4f32:
; CHECK: // %bb.0: // %entry
; CHECK-NEXT: fmov s2, #1.00000000
; CHECK-NEXT: fdiv s0, s2, s0
; CHECK-NEXT: mov z0.s, s0
; CHECK-NEXT: fmul z0.s, z1.s, z0.s
; CHECK-NEXT: ret
entry:
%D.ins = insertelement <vscale x 4 x float> poison, float %D, i64 0
%splat = shufflevector <vscale x 4 x float> %D.ins, <vscale x 4 x float> poison, <vscale x 4 x i32> zeroinitializer
%div = fdiv <vscale x 4 x float> %a, %splat
ret <vscale x 4 x float> %div
}
define void @splat_three_fdiv_nxv4f32(float %D, <vscale x 4 x float> %a, <vscale x 4 x float> %b, <vscale x 4 x float> %c) #1 {
; CHECK-LABEL: splat_three_fdiv_nxv4f32:
; CHECK: // %bb.0: // %entry
; CHECK-NEXT: fmov s4, #1.00000000
; CHECK-NEXT: fdiv s0, s4, s0
; CHECK-NEXT: mov z4.s, s0
; CHECK-NEXT: fmul z0.s, z1.s, z4.s
; CHECK-NEXT: fmul z1.s, z2.s, z4.s
; CHECK-NEXT: fmul z2.s, z3.s, z4.s
; CHECK-NEXT: b foo_3_nxv4f32
entry:
%D.ins = insertelement <vscale x 4 x float> poison, float %D, i64 0
%splat = shufflevector <vscale x 4 x float> %D.ins, <vscale x 4 x float> poison, <vscale x 4 x i32> zeroinitializer
%div = fdiv <vscale x 4 x float> %a, %splat
%div1 = fdiv <vscale x 4 x float> %b, %splat
%div2 = fdiv <vscale x 4 x float> %c, %splat
tail call void @foo_3_nxv4f32(<vscale x 4 x float> %div, <vscale x 4 x float> %div1, <vscale x 4 x float> %div2)
ret void
}
define <vscale x 2 x double> @splat_fdiv_nxv2f64(double %D, <vscale x 2 x double> %a) #1 {
; CHECK-LABEL: splat_fdiv_nxv2f64:
; CHECK: // %bb.0: // %entry
; CHECK-NEXT: // kill: def $d0 killed $d0 def $z0
; CHECK-NEXT: ptrue p0.d
; CHECK-NEXT: mov z0.d, d0
; CHECK-NEXT: fdivr z0.d, p0/m, z0.d, z1.d
; CHECK-NEXT: ret
entry:
%D.ins = insertelement <vscale x 2 x double> poison, double %D, i64 0
%splat = shufflevector <vscale x 2 x double> %D.ins, <vscale x 2 x double> poison, <vscale x 2 x i32> zeroinitializer
%div = fdiv <vscale x 2 x double> %a, %splat
ret <vscale x 2 x double> %div
}
define void @splat_two_fdiv_nxv2f64(double %D, <vscale x 2 x double> %a, <vscale x 2 x double> %b) #1 {
; CHECK-LABEL: splat_two_fdiv_nxv2f64:
; CHECK: // %bb.0: // %entry
; CHECK-NEXT: fmov d3, #1.00000000
; CHECK-NEXT: fdiv d0, d3, d0
; CHECK-NEXT: mov z3.d, d0
; CHECK-NEXT: fmul z0.d, z1.d, z3.d
; CHECK-NEXT: fmul z1.d, z2.d, z3.d
; CHECK-NEXT: b foo_2_nxv2f64
entry:
%D.ins = insertelement <vscale x 2 x double> poison, double %D, i64 0
%splat = shufflevector <vscale x 2 x double> %D.ins, <vscale x 2 x double> poison, <vscale x 2 x i32> zeroinitializer
%div = fdiv <vscale x 2 x double> %a, %splat
%div1 = fdiv <vscale x 2 x double> %b, %splat
tail call void @foo_2_nxv2f64(<vscale x 2 x double> %div, <vscale x 2 x double> %div1)
ret void
}
declare void @foo_3f(float, float, float)
declare void @foo_3d(double, double, double)
declare void @foo_3_4xf(<4 x float>, <4 x float>, <4 x float>)
declare void @foo_3_2xd(<2 x double>, <2 x double>, <2 x double>)
declare void @foo_2f(float, float)
declare void @foo_2d(double, double)
declare void @foo_3_nxv4f32(<vscale x 4 x float>, <vscale x 4 x float>, <vscale x 4 x float>)
declare void @foo_2_nxv2f64(<vscale x 2 x double>, <vscale x 2 x double>)
attributes #0 = { "unsafe-fp-math"="true" }
attributes #1 = { "unsafe-fp-math"="true" "target-features"="+sve" }
|
