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
|
; Test 32-bit floating-point comparison.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
declare float @foo()
; Check comparison with registers.
define i64 @f1(i64 %a, i64 %b, float %f1, float %f2) {
; CHECK-LABEL: f1:
; CHECK: cebr %f0, %f2
; CHECK-NEXT: je
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%cond = fcmp oeq float %f1, %f2
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}
; Check the low end of the CEB range.
define i64 @f2(i64 %a, i64 %b, float %f1, float *%ptr) {
; CHECK-LABEL: f2:
; CHECK: ceb %f0, 0(%r4)
; CHECK-NEXT: je
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%f2 = load float *%ptr
%cond = fcmp oeq float %f1, %f2
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}
; Check the high end of the aligned CEB range.
define i64 @f3(i64 %a, i64 %b, float %f1, float *%base) {
; CHECK-LABEL: f3:
; CHECK: ceb %f0, 4092(%r4)
; CHECK-NEXT: je
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%ptr = getelementptr float *%base, i64 1023
%f2 = load float *%ptr
%cond = fcmp oeq float %f1, %f2
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}
; Check the next word up, which needs separate address logic.
; Other sequences besides this one would be OK.
define i64 @f4(i64 %a, i64 %b, float %f1, float *%base) {
; CHECK-LABEL: f4:
; CHECK: aghi %r4, 4096
; CHECK: ceb %f0, 0(%r4)
; CHECK-NEXT: je
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%ptr = getelementptr float *%base, i64 1024
%f2 = load float *%ptr
%cond = fcmp oeq float %f1, %f2
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}
; Check negative displacements, which also need separate address logic.
define i64 @f5(i64 %a, i64 %b, float %f1, float *%base) {
; CHECK-LABEL: f5:
; CHECK: aghi %r4, -4
; CHECK: ceb %f0, 0(%r4)
; CHECK-NEXT: je
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%ptr = getelementptr float *%base, i64 -1
%f2 = load float *%ptr
%cond = fcmp oeq float %f1, %f2
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}
; Check that CEB allows indices.
define i64 @f6(i64 %a, i64 %b, float %f1, float *%base, i64 %index) {
; CHECK-LABEL: f6:
; CHECK: sllg %r1, %r5, 2
; CHECK: ceb %f0, 400(%r1,%r4)
; CHECK-NEXT: je
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%ptr1 = getelementptr float *%base, i64 %index
%ptr2 = getelementptr float *%ptr1, i64 100
%f2 = load float *%ptr2
%cond = fcmp oeq float %f1, %f2
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}
; Check that comparisons of spilled values can use CEB rather than CEBR.
define float @f7(float *%ptr0) {
; CHECK-LABEL: f7:
; CHECK: brasl %r14, foo@PLT
; CHECK: ceb {{%f[0-9]+}}, 16{{[04]}}(%r15)
; CHECK: br %r14
%ptr1 = getelementptr float *%ptr0, i64 2
%ptr2 = getelementptr float *%ptr0, i64 4
%ptr3 = getelementptr float *%ptr0, i64 6
%ptr4 = getelementptr float *%ptr0, i64 8
%ptr5 = getelementptr float *%ptr0, i64 10
%ptr6 = getelementptr float *%ptr0, i64 12
%ptr7 = getelementptr float *%ptr0, i64 14
%ptr8 = getelementptr float *%ptr0, i64 16
%ptr9 = getelementptr float *%ptr0, i64 18
%ptr10 = getelementptr float *%ptr0, i64 20
%val0 = load float *%ptr0
%val1 = load float *%ptr1
%val2 = load float *%ptr2
%val3 = load float *%ptr3
%val4 = load float *%ptr4
%val5 = load float *%ptr5
%val6 = load float *%ptr6
%val7 = load float *%ptr7
%val8 = load float *%ptr8
%val9 = load float *%ptr9
%val10 = load float *%ptr10
%ret = call float @foo()
%cmp0 = fcmp olt float %ret, %val0
%cmp1 = fcmp olt float %ret, %val1
%cmp2 = fcmp olt float %ret, %val2
%cmp3 = fcmp olt float %ret, %val3
%cmp4 = fcmp olt float %ret, %val4
%cmp5 = fcmp olt float %ret, %val5
%cmp6 = fcmp olt float %ret, %val6
%cmp7 = fcmp olt float %ret, %val7
%cmp8 = fcmp olt float %ret, %val8
%cmp9 = fcmp olt float %ret, %val9
%cmp10 = fcmp olt float %ret, %val10
%sel0 = select i1 %cmp0, float %ret, float 0.0
%sel1 = select i1 %cmp1, float %sel0, float 1.0
%sel2 = select i1 %cmp2, float %sel1, float 2.0
%sel3 = select i1 %cmp3, float %sel2, float 3.0
%sel4 = select i1 %cmp4, float %sel3, float 4.0
%sel5 = select i1 %cmp5, float %sel4, float 5.0
%sel6 = select i1 %cmp6, float %sel5, float 6.0
%sel7 = select i1 %cmp7, float %sel6, float 7.0
%sel8 = select i1 %cmp8, float %sel7, float 8.0
%sel9 = select i1 %cmp9, float %sel8, float 9.0
%sel10 = select i1 %cmp10, float %sel9, float 10.0
ret float %sel10
}
; Check comparison with zero.
define i64 @f8(i64 %a, i64 %b, float %f) {
; CHECK-LABEL: f8:
; CHECK: ltebr %f0, %f0
; CHECK-NEXT: je
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%cond = fcmp oeq float %f, 0.0
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}
|
