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
| ; Test 32-bit unsigned comparisons between memory and a constant.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
; Check ordered comparisons with a constant near the low end of the unsigned
; 16-bit range.
define double @f1(double %a, double %b, i32 *%ptr) {
; CHECK-LABEL: f1:
; CHECK: clfhsi 0(%r2), 1
; CHECK-NEXT: bhr %r14
; CHECK: ldr %f0, %f2
; CHECK: br %r14
%val = load i32, i32 *%ptr
%cond = icmp ugt i32 %val, 1
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check ordered comparisons with the high end of the unsigned 16-bit range.
define double @f2(double %a, double %b, i32 *%ptr) {
; CHECK-LABEL: f2:
; CHECK: clfhsi 0(%r2), 65535
; CHECK-NEXT: blr %r14
; CHECK: ldr %f0, %f2
; CHECK: br %r14
%val = load i32, i32 *%ptr
%cond = icmp ult i32 %val, 65535
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check the next value up, which can't use CLFHSI.
define double @f3(double %a, double %b, i32 *%ptr) {
; CHECK-LABEL: f3:
; CHECK-NOT: clfhsi
; CHECK: br %r14
%val = load i32, i32 *%ptr
%cond = icmp ult i32 %val, 65536
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check equality comparisons with 32768, the lowest value for which
; we prefer CLFHSI to CHSI.
define double @f4(double %a, double %b, i32 *%ptr) {
; CHECK-LABEL: f4:
; CHECK: clfhsi 0(%r2), 32768
; CHECK-NEXT: ber %r14
; CHECK: ldr %f0, %f2
; CHECK: br %r14
%val = load i32, i32 *%ptr
%cond = icmp eq i32 %val, 32768
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check equality comparisons with the high end of the unsigned 16-bit range.
define double @f5(double %a, double %b, i32 *%ptr) {
; CHECK-LABEL: f5:
; CHECK: clfhsi 0(%r2), 65535
; CHECK-NEXT: ber %r14
; CHECK: ldr %f0, %f2
; CHECK: br %r14
%val = load i32, i32 *%ptr
%cond = icmp eq i32 %val, 65535
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check the next value up, which can't use CLFHSI.
define double @f6(double %a, double %b, i32 *%ptr) {
; CHECK-LABEL: f6:
; CHECK-NOT: clfhsi
; CHECK: br %r14
%val = load i32, i32 *%ptr
%cond = icmp eq i32 %val, 65536
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check the high end of the CLFHSI range.
define double @f7(double %a, double %b, i32 %i1, i32 *%base) {
; CHECK-LABEL: f7:
; CHECK: clfhsi 4092(%r3), 1
; CHECK-NEXT: bhr %r14
; CHECK: ldr %f0, %f2
; CHECK: br %r14
%ptr = getelementptr i32, i32 *%base, i64 1023
%val = load i32, i32 *%ptr
%cond = icmp ugt i32 %val, 1
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check the next word up, which needs separate address logic,
define double @f8(double %a, double %b, i32 *%base) {
; CHECK-LABEL: f8:
; CHECK: aghi %r2, 4096
; CHECK: clfhsi 0(%r2), 1
; CHECK-NEXT: bhr %r14
; CHECK: ldr %f0, %f2
; CHECK: br %r14
%ptr = getelementptr i32, i32 *%base, i64 1024
%val = load i32, i32 *%ptr
%cond = icmp ugt i32 %val, 1
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check negative offsets, which also need separate address logic.
define double @f9(double %a, double %b, i32 *%base) {
; CHECK-LABEL: f9:
; CHECK: aghi %r2, -4
; CHECK: clfhsi 0(%r2), 1
; CHECK-NEXT: bhr %r14
; CHECK: ldr %f0, %f2
; CHECK: br %r14
%ptr = getelementptr i32, i32 *%base, i64 -1
%val = load i32, i32 *%ptr
%cond = icmp ugt i32 %val, 1
%res = select i1 %cond, double %a, double %b
ret double %res
}
; Check that CLFHSI does not allow indices.
define double @f10(double %a, double %b, i64 %base, i64 %index) {
; CHECK-LABEL: f10:
; CHECK: agr {{%r2, %r3|%r3, %r2}}
; CHECK: clfhsi 0({{%r[23]}}), 1
; CHECK-NEXT: bhr %r14
; CHECK: ldr %f0, %f2
; CHECK: br %r14
%add = add i64 %base, %index
%ptr = inttoptr i64 %add to i32 *
%val = load i32, i32 *%ptr
%cond = icmp ugt i32 %val, 1
%res = select i1 %cond, double %a, double %b
ret double %res
}
|