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
|
; Test STOCFHs that are presented as selects.
; See comments in asm-18.ll about testing high-word operations.
;
; RUN: llc < %s -verify-machineinstrs -mtriple=s390x-linux-gnu -mcpu=z13 \
; RUN: -no-integrated-as | FileCheck %s
declare void @foo(i32 *)
; Test the simple case, with the loaded value first.
define void @f1(i32 *%ptr, i32 %limit) {
; CHECK-LABEL: f1:
; CHECK-DAG: stepa [[REG:%r[0-5]]]
; CHECK-DAG: clfi %r3, 42
; CHECK: stocfhhe [[REG]], 0(%r2)
; CHECK: br %r14
%alt = call i32 asm "stepa $0", "=h"()
%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 %limit) {
; CHECK-LABEL: f2:
; CHECK-DAG: stepa [[REG:%r[0-5]]]
; CHECK-DAG: clfi %r3, 42
; CHECK: stocfhl [[REG]], 0(%r2)
; CHECK: br %r14
%alt = call i32 asm "stepa $0", "=h"()
%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
}
; Check the high end of the aligned STOC range.
define void @f3(i32 *%base, i32 %limit) {
; CHECK-LABEL: f3:
; CHECK-DAG: stepa [[REG:%r[0-5]]]
; CHECK-DAG: clfi %r3, 42
; CHECK: stocfhhe [[REG]], 524284(%r2)
; CHECK: br %r14
%alt = call i32 asm "stepa $0", "=h"()
%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 @f4(i32 *%base, i32 %limit) {
; CHECK-LABEL: f4:
; CHECK-DAG: stepa [[REG:%r[0-5]]]
; CHECK-DAG: agfi %r2, 524288
; CHECK-DAG: clfi %r3, 42
; CHECK: stocfhhe [[REG]], 0(%r2)
; CHECK: br %r14
%alt = call i32 asm "stepa $0", "=h"()
%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 @f5(i32 *%base, i32 %limit) {
; CHECK-LABEL: f5:
; CHECK-DAG: stepa [[REG:%r[0-5]]]
; CHECK-DAG: clfi %r3, 42
; CHECK: stocfhhe [[REG]], -524288(%r2)
; CHECK: br %r14
%alt = call i32 asm "stepa $0", "=h"()
%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 @f6(i32 *%base, i32 %limit) {
; CHECK-LABEL: f6:
; CHECK-DAG: stepa [[REG:%r[0-5]]]
; CHECK-DAG: agfi %r2, -524292
; CHECK-DAG: clfi %r3, 42
; CHECK: stocfhhe [[REG]], 0(%r2)
; CHECK: br %r14
%alt = call i32 asm "stepa $0", "=h"()
%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 @f7(i32 %limit) {
; CHECK-LABEL: f7:
; CHECK: brasl %r14, foo@PLT
; CHECK: stepa [[REG:%r[0-5]]]
; CHECK: stocfhhe [[REG]], {{[0-9]+}}(%r15)
; CHECK: brasl %r14, foo@PLT
; CHECK: br %r14
%ptr = alloca i32
call void @foo(i32 *%ptr)
%alt = call i32 asm "stepa $0", "=h"()
%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 @f8(i32 %a, i32 %b, i32 *%dest) {
; CHECK-LABEL: f8:
; CHECK-NOT: stoc
; CHECK: stfh
; CHECK: br %r14
entry:
%val = call i32 asm "stepa $0", "=h"()
%cmp = icmp ule i32 %a, %b
br i1 %cmp, label %store, label %exit
store:
store i32 %val, i32 *%dest
br label %exit
exit:
ret void
}
|
