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
|
; Test LOC.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
declare i32 @foo(i32 *)
; Test the simple case.
define i32 @f1(i32 %easy, i32 *%ptr, i32 %limit) {
; CHECK-LABEL: f1:
; CHECK: clfi %r4, 42
; CHECK: loche %r2, 0(%r3)
; CHECK: br %r14
%cond = icmp ult i32 %limit, 42
%other = load i32 , i32 *%ptr
%res = select i1 %cond, i32 %easy, i32 %other
ret i32 %res
}
; ...and again with the operands swapped.
define i32 @f2(i32 %easy, i32 *%ptr, i32 %limit) {
; CHECK-LABEL: f2:
; CHECK: clfi %r4, 42
; CHECK: locl %r2, 0(%r3)
; CHECK: br %r14
%cond = icmp ult i32 %limit, 42
%other = load i32 , i32 *%ptr
%res = select i1 %cond, i32 %other, i32 %easy
ret i32 %res
}
; Check the high end of the aligned LOC range.
define i32 @f3(i32 %easy, i32 *%base, i32 %limit) {
; CHECK-LABEL: f3:
; CHECK: clfi %r4, 42
; CHECK: loche %r2, 524284(%r3)
; CHECK: br %r14
%ptr = getelementptr i32, i32 *%base, i64 131071
%cond = icmp ult i32 %limit, 42
%other = load i32 , i32 *%ptr
%res = select i1 %cond, i32 %easy, i32 %other
ret i32 %res
}
; Check the next word up. Other sequences besides this one would be OK.
define i32 @f4(i32 %easy, i32 *%base, i32 %limit) {
; CHECK-LABEL: f4:
; CHECK: agfi %r3, 524288
; CHECK: clfi %r4, 42
; CHECK: loche %r2, 0(%r3)
; CHECK: br %r14
%ptr = getelementptr i32, i32 *%base, i64 131072
%cond = icmp ult i32 %limit, 42
%other = load i32 , i32 *%ptr
%res = select i1 %cond, i32 %easy, i32 %other
ret i32 %res
}
; Check the low end of the LOC range.
define i32 @f5(i32 %easy, i32 *%base, i32 %limit) {
; CHECK-LABEL: f5:
; CHECK: clfi %r4, 42
; CHECK: loche %r2, -524288(%r3)
; CHECK: br %r14
%ptr = getelementptr i32, i32 *%base, i64 -131072
%cond = icmp ult i32 %limit, 42
%other = load i32 , i32 *%ptr
%res = select i1 %cond, i32 %easy, i32 %other
ret i32 %res
}
; Check the next word down, with the same comments as f4.
define i32 @f6(i32 %easy, i32 *%base, i32 %limit) {
; CHECK-LABEL: f6:
; CHECK: agfi %r3, -524292
; CHECK: clfi %r4, 42
; CHECK: loche %r2, 0(%r3)
; CHECK: br %r14
%ptr = getelementptr i32, i32 *%base, i64 -131073
%cond = icmp ult i32 %limit, 42
%other = load i32 , i32 *%ptr
%res = select i1 %cond, i32 %easy, i32 %other
ret i32 %res
}
; Try a frame index base.
define i32 @f7(i32 %alt, i32 %limit) {
; CHECK-LABEL: f7:
; CHECK: brasl %r14, foo@PLT
; CHECK: loche %r2, {{[0-9]+}}(%r15)
; CHECK: br %r14
%ptr = alloca i32
%easy = call i32 @foo(i32 *%ptr)
%cond = icmp ult i32 %limit, 42
%other = load i32 , i32 *%ptr
%res = select i1 %cond, i32 %easy, i32 %other
ret i32 %res
}
; Try a case when an index is involved.
define i32 @f8(i32 %easy, i32 %limit, i64 %base, i64 %index) {
; CHECK-LABEL: f8:
; CHECK: clfi %r3, 42
; CHECK: loche %r2, 0({{%r[1-5]}})
; CHECK: br %r14
%add = add i64 %base, %index
%ptr = inttoptr i64 %add to i32 *
%cond = icmp ult i32 %limit, 42
%other = load i32 , i32 *%ptr
%res = select i1 %cond, i32 %easy, i32 %other
ret i32 %res
}
; Test that conditionally-executed loads do not use LOC, since it is allowed
; to trap even when the condition is false.
define i32 @f9(i32 %easy, i32 %limit, i32 *%ptr) {
; CHECK-LABEL: f9:
; CHECK-NOT: loc
; CHECK: br %r14
entry:
%cmp = icmp ule i32 %easy, %limit
br i1 %cmp, label %load, label %exit
load:
%other = load i32 , i32 *%ptr
br label %exit
exit:
%res = phi i32 [ %easy, %entry ], [ %other, %load ]
ret i32 %res
}
|
