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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -instcombine < %s | FileCheck %s
declare float @llvm.fabs.f32(float)
declare float @llvm.copysign.f32(float, float)
declare float @llvm.maxnum.f32(float, float)
declare <3 x double> @llvm.copysign.v3f64(<3 x double>, <3 x double>)
define float @positive_sign_arg(float %x) {
; CHECK-LABEL: @positive_sign_arg(
; CHECK-NEXT: [[TMP1:%.*]] = call arcp float @llvm.fabs.f32(float [[X:%.*]])
; CHECK-NEXT: ret float [[TMP1]]
;
%r = call arcp float @llvm.copysign.f32(float %x, float 0.0)
ret float %r
}
define <3 x double> @positive_sign_arg_vec_splat(<3 x double> %x) {
; CHECK-LABEL: @positive_sign_arg_vec_splat(
; CHECK-NEXT: [[TMP1:%.*]] = call ninf <3 x double> @llvm.fabs.v3f64(<3 x double> [[X:%.*]])
; CHECK-NEXT: ret <3 x double> [[TMP1]]
;
%r = call ninf <3 x double> @llvm.copysign.v3f64(<3 x double> %x, <3 x double> <double 42.0, double 42.0, double 42.0>)
ret <3 x double> %r
}
define float @negative_sign_arg(float %x) {
; CHECK-LABEL: @negative_sign_arg(
; CHECK-NEXT: [[TMP1:%.*]] = call nnan float @llvm.fabs.f32(float [[X:%.*]])
; CHECK-NEXT: [[TMP2:%.*]] = fneg nnan float [[TMP1]]
; CHECK-NEXT: ret float [[TMP2]]
;
%r = call nnan float @llvm.copysign.f32(float %x, float -0.0)
ret float %r
}
define <3 x double> @negative_sign_arg_vec_splat(<3 x double> %x) {
; CHECK-LABEL: @negative_sign_arg_vec_splat(
; CHECK-NEXT: [[TMP1:%.*]] = call fast <3 x double> @llvm.fabs.v3f64(<3 x double> [[X:%.*]])
; CHECK-NEXT: [[TMP2:%.*]] = fneg fast <3 x double> [[TMP1]]
; CHECK-NEXT: ret <3 x double> [[TMP2]]
;
%r = call fast <3 x double> @llvm.copysign.v3f64(<3 x double> %x, <3 x double> <double -42.0, double -42.0, double -42.0>)
ret <3 x double> %r
}
define float @known_positive_sign_arg(float %x, float %y) {
; CHECK-LABEL: @known_positive_sign_arg(
; CHECK-NEXT: [[TMP1:%.*]] = call ninf float @llvm.fabs.f32(float [[X:%.*]])
; CHECK-NEXT: ret float [[TMP1]]
;
%fabs = call float @llvm.fabs.f32(float %y)
%r = call ninf float @llvm.copysign.f32(float %x, float %fabs)
ret float %r
}
define <3 x double> @known_positive_sign_arg_vec(<3 x double> %x, <3 x i32> %y) {
; CHECK-LABEL: @known_positive_sign_arg_vec(
; CHECK-NEXT: [[TMP1:%.*]] = call arcp <3 x double> @llvm.fabs.v3f64(<3 x double> [[X:%.*]])
; CHECK-NEXT: ret <3 x double> [[TMP1]]
;
%yf = uitofp <3 x i32> %y to <3 x double>
%r = call arcp <3 x double> @llvm.copysign.v3f64(<3 x double> %x, <3 x double> %yf)
ret <3 x double> %r
}
; maxnum(-0.0, 0.0) can return -0.0.
define float @not_known_positive_sign_arg(float %x, float %y) {
; CHECK-LABEL: @not_known_positive_sign_arg(
; CHECK-NEXT: [[MAX:%.*]] = call float @llvm.maxnum.f32(float [[X:%.*]], float 0.000000e+00)
; CHECK-NEXT: [[R:%.*]] = call ninf float @llvm.copysign.f32(float [[Y:%.*]], float [[MAX]])
; CHECK-NEXT: ret float [[R]]
;
%max = call float @llvm.maxnum.f32(float %x, float 0.0)
%r = call ninf float @llvm.copysign.f32(float %y, float %max)
ret float %r
}
; The magnitude operand of the 1st copysign is irrelevant.
; copysign(x, copysign(y, z)) --> copysign(x, z)
define float @copysign_sign_arg(float %x, float %y, float %z) {
; CHECK-LABEL: @copysign_sign_arg(
; CHECK-NEXT: [[R:%.*]] = call ninf float @llvm.copysign.f32(float [[X:%.*]], float [[Z:%.*]])
; CHECK-NEXT: ret float [[R]]
;
%s = call reassoc float @llvm.copysign.f32(float %y, float %z)
%r = call ninf float @llvm.copysign.f32(float %x, float %s)
ret float %r
}
define float @fneg_mag(float %x, float %y) {
; CHECK-LABEL: @fneg_mag(
; CHECK-NEXT: [[R:%.*]] = call float @llvm.copysign.f32(float [[X:%.*]], float [[Y:%.*]])
; CHECK-NEXT: ret float [[R]]
;
%n = fneg float %x
%r = call float @llvm.copysign.f32(float %n, float %y)
ret float %r
}
define float @fabs_mag(float %x, float %y) {
; CHECK-LABEL: @fabs_mag(
; CHECK-NEXT: [[R:%.*]] = call float @llvm.copysign.f32(float [[X:%.*]], float [[Y:%.*]])
; CHECK-NEXT: ret float [[R]]
;
%a = call float @llvm.fabs.f32(float %x)
%r = call float @llvm.copysign.f32(float %a, float %y)
ret float %r
}
|
