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
|
; Test STOCs that are presented as selects.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
declare void @foo(i32 *)
; Test the simple case, with the loaded value first.
define void @f1(i32 *%ptr, i32 %alt, i32 %limit) {
; CHECK-LABEL: f1:
; CHECK: clfi %r4, 42
; CHECK: stoche %r3, 0(%r2)
; CHECK: br %r14
%cond = icmp ult i32 %limit, 42
%orig = load i32 , i32 *%ptr
%res = select i1 %cond, i32 %orig, i32 %alt
store i32 %res, i32 *%ptr
ret void
}
; ...and with the loaded value second
define void @f2(i32 *%ptr, i32 %alt, i32 %limit) {
; CHECK-LABEL: f2:
; CHECK: clfi %r4, 42
; CHECK: stocl %r3, 0(%r2)
; CHECK: br %r14
%cond = icmp ult i32 %limit, 42
%orig = load i32 , i32 *%ptr
%res = select i1 %cond, i32 %alt, i32 %orig
store i32 %res, i32 *%ptr
ret void
}
; Test cases where the value is explicitly sign-extended to 64 bits, with the
; loaded value first.
define void @f3(i32 *%ptr, i64 %alt, i32 %limit) {
; CHECK-LABEL: f3:
; CHECK: clfi %r4, 42
; CHECK: stoche %r3, 0(%r2)
; CHECK: br %r14
%cond = icmp ult i32 %limit, 42
%orig = load i32 , i32 *%ptr
%ext = sext i32 %orig to i64
%res = select i1 %cond, i64 %ext, i64 %alt
%trunc = trunc i64 %res to i32
store i32 %trunc, i32 *%ptr
ret void
}
; ...and with the loaded value second
define void @f4(i32 *%ptr, i64 %alt, i32 %limit) {
; CHECK-LABEL: f4:
; CHECK: clfi %r4, 42
; CHECK: stocl %r3, 0(%r2)
; CHECK: br %r14
%cond = icmp ult i32 %limit, 42
%orig = load i32 , i32 *%ptr
%ext = sext i32 %orig to i64
%res = select i1 %cond, i64 %alt, i64 %ext
%trunc = trunc i64 %res to i32
store i32 %trunc, i32 *%ptr
ret void
}
; Test cases where the value is explicitly zero-extended to 32 bits, with the
; loaded value first.
define void @f5(i32 *%ptr, i64 %alt, i32 %limit) {
; CHECK-LABEL: f5:
; CHECK: clfi %r4, 42
; CHECK: stoche %r3, 0(%r2)
; CHECK: br %r14
%cond = icmp ult i32 %limit, 42
%orig = load i32 , i32 *%ptr
%ext = zext i32 %orig to i64
%res = select i1 %cond, i64 %ext, i64 %alt
%trunc = trunc i64 %res to i32
store i32 %trunc, i32 *%ptr
ret void
}
; ...and with the loaded value second
define void @f6(i32 *%ptr, i64 %alt, i32 %limit) {
; CHECK-LABEL: f6:
; CHECK: clfi %r4, 42
; CHECK: stocl %r3, 0(%r2)
; CHECK: br %r14
%cond = icmp ult i32 %limit, 42
%orig = load i32 , i32 *%ptr
%ext = zext i32 %orig to i64
%res = select i1 %cond, i64 %alt, i64 %ext
%trunc = trunc i64 %res to i32
store i32 %trunc, i32 *%ptr
ret void
}
; Check the high end of the aligned STOC range.
define void @f7(i32 *%base, i32 %alt, i32 %limit) {
; CHECK-LABEL: f7:
; CHECK: clfi %r4, 42
; CHECK: stoche %r3, 524284(%r2)
; CHECK: br %r14
%ptr = getelementptr i32, i32 *%base, i64 131071
%cond = icmp ult i32 %limit, 42
%orig = load i32 , i32 *%ptr
%res = select i1 %cond, i32 %orig, i32 %alt
store i32 %res, i32 *%ptr
ret void
}
; Check the next word up. Other sequences besides this one would be OK.
define void @f8(i32 *%base, i32 %alt, i32 %limit) {
; CHECK-LABEL: f8:
; CHECK: agfi %r2, 524288
; CHECK: clfi %r4, 42
; CHECK: stoche %r3, 0(%r2)
; CHECK: br %r14
%ptr = getelementptr i32, i32 *%base, i64 131072
%cond = icmp ult i32 %limit, 42
%orig = load i32 , i32 *%ptr
%res = select i1 %cond, i32 %orig, i32 %alt
store i32 %res, i32 *%ptr
ret void
}
; Check the low end of the STOC range.
define void @f9(i32 *%base, i32 %alt, i32 %limit) {
; CHECK-LABEL: f9:
; CHECK: clfi %r4, 42
; CHECK: stoche %r3, -524288(%r2)
; CHECK: br %r14
%ptr = getelementptr i32, i32 *%base, i64 -131072
%cond = icmp ult i32 %limit, 42
%orig = load i32 , i32 *%ptr
%res = select i1 %cond, i32 %orig, i32 %alt
store i32 %res, i32 *%ptr
ret void
}
; Check the next word down, with the same comments as f8.
define void @f10(i32 *%base, i32 %alt, i32 %limit) {
; CHECK-LABEL: f10:
; CHECK: agfi %r2, -524292
; CHECK: clfi %r4, 42
; CHECK: stoche %r3, 0(%r2)
; CHECK: br %r14
%ptr = getelementptr i32, i32 *%base, i64 -131073
%cond = icmp ult i32 %limit, 42
%orig = load i32 , i32 *%ptr
%res = select i1 %cond, i32 %orig, i32 %alt
store i32 %res, i32 *%ptr
ret void
}
; Try a frame index base.
define void @f11(i32 %alt, i32 %limit) {
; CHECK-LABEL: f11:
; CHECK: brasl %r14, foo@PLT
; CHECK: stoche {{%r[0-9]+}}, {{[0-9]+}}(%r15)
; CHECK: brasl %r14, foo@PLT
; CHECK: br %r14
%ptr = alloca i32
call void @foo(i32 *%ptr)
%cond = icmp ult i32 %limit, 42
%orig = load i32 , i32 *%ptr
%res = select i1 %cond, i32 %orig, i32 %alt
store i32 %res, i32 *%ptr
call void @foo(i32 *%ptr)
ret void
}
; Test that conditionally-executed stores do not use STOC, since STOC
; is allowed to trap even when the condition is false.
define void @f12(i32 %a, i32 %b, i32 *%dest) {
; CHECK-LABEL: f12:
; CHECK-NOT: stoc
; CHECK: br %r14
entry:
%cmp = icmp ule i32 %a, %b
br i1 %cmp, label %store, label %exit
store:
store i32 %b, i32 *%dest
br label %exit
exit:
ret void
}
|
