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
|
; Test the handling of the frame pointer (%r11).
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -frame-pointer=all | FileCheck %s
; We should always initialise %r11 when FP elimination is disabled.
; We don't need to allocate any more than the caller-provided 160-byte
; area though.
define i32 @f1(i32 %x) {
; CHECK-LABEL: f1:
; CHECK: stmg %r11, %r15, 88(%r15)
; CHECK: .cfi_offset %r11, -72
; CHECK: .cfi_offset %r15, -40
; CHECK-NOT: ag
; CHECK: lgr %r11, %r15
; CHECK: .cfi_def_cfa_register %r11
; CHECK: lmg %r11, %r15, 88(%r11)
; CHECK: br %r14
%y = add i32 %x, 1
ret i32 %y
}
; Make sure that frame accesses after the initial allocation are relative
; to %r11 rather than %r15.
define void @f2(i64 %x) {
; CHECK-LABEL: f2:
; CHECK: stmg %r11, %r15, 88(%r15)
; CHECK: .cfi_offset %r11, -72
; CHECK: .cfi_offset %r15, -40
; CHECK: aghi %r15, -168
; CHECK: .cfi_def_cfa_offset 328
; CHECK: lgr %r11, %r15
; CHECK: .cfi_def_cfa_register %r11
; CHECK: stg %r2, 160(%r11)
; CHECK: lmg %r11, %r15, 256(%r11)
; CHECK: br %r14
%y = alloca i64, align 8
store volatile i64 %x, ptr %y
ret void
}
; This function should require all GPRs but no other spill slots.
; It shouldn't need to allocate its own frame.
define void @f3(ptr %ptr) {
; CHECK-LABEL: f3:
; CHECK: stmg %r6, %r15, 48(%r15)
; CHECK-NOT: %r15
; CHECK-NOT: %r11
; CHECK: .cfi_offset %r6, -112
; CHECK: .cfi_offset %r7, -104
; CHECK: .cfi_offset %r8, -96
; CHECK: .cfi_offset %r9, -88
; CHECK: .cfi_offset %r10, -80
; CHECK: .cfi_offset %r11, -72
; CHECK: .cfi_offset %r12, -64
; CHECK: .cfi_offset %r13, -56
; CHECK: .cfi_offset %r14, -48
; CHECK: .cfi_offset %r15, -40
; CHECK-NOT: ag
; CHECK: lgr %r11, %r15
; CHECK: .cfi_def_cfa_register %r11
; ...main function body...
; CHECK-NOT: %r15
; CHECK-NOT: %r11
; CHECK: st {{.*}}, 4(%r2)
; CHECK: lmg %r6, %r15, 48(%r11)
; CHECK: br %r14
%l0 = load volatile i32, ptr %ptr
%l1 = load volatile i32, ptr %ptr
%l3 = load volatile i32, ptr %ptr
%l4 = load volatile i32, ptr %ptr
%l5 = load volatile i32, ptr %ptr
%l6 = load volatile i32, ptr %ptr
%l7 = load volatile i32, ptr %ptr
%l8 = load volatile i32, ptr %ptr
%l9 = load volatile i32, ptr %ptr
%l10 = load volatile i32, ptr %ptr
%l12 = load volatile i32, ptr %ptr
%l13 = load volatile i32, ptr %ptr
%l14 = load volatile i32, ptr %ptr
%add0 = add i32 %l0, %l0
%add1 = add i32 %l1, %add0
%add3 = add i32 %l3, %add1
%add4 = add i32 %l4, %add3
%add5 = add i32 %l5, %add4
%add6 = add i32 %l6, %add5
%add7 = add i32 %l7, %add6
%add8 = add i32 %l8, %add7
%add9 = add i32 %l9, %add8
%add10 = add i32 %l10, %add9
%add12 = add i32 %l12, %add10
%add13 = add i32 %l13, %add12
%add14 = add i32 %l14, %add13
store volatile i32 %add0, ptr %ptr
store volatile i32 %add1, ptr %ptr
store volatile i32 %add3, ptr %ptr
store volatile i32 %add4, ptr %ptr
store volatile i32 %add5, ptr %ptr
store volatile i32 %add6, ptr %ptr
store volatile i32 %add7, ptr %ptr
store volatile i32 %add8, ptr %ptr
store volatile i32 %add9, ptr %ptr
store volatile i32 %add10, ptr %ptr
store volatile i32 %add12, ptr %ptr
store volatile i32 %add13, ptr %ptr
%final = getelementptr i32, ptr %ptr, i32 1
store volatile i32 %add14, ptr %final
ret void
}
; The largest frame for which the LMG is in range. This frame has two
; emergency spill slots at 160(%r11), so create a frame of size 524192
; by allocating (524192 - 176) / 8 = 65502 doublewords.
define void @f4(i64 %x) {
; CHECK-LABEL: f4:
; CHECK: stmg %r11, %r15, 88(%r15)
; CHECK: .cfi_offset %r11, -72
; CHECK: .cfi_offset %r15, -40
; CHECK: agfi %r15, -524192
; CHECK: .cfi_def_cfa_offset 524352
; CHECK: lgr %r11, %r15
; CHECK: .cfi_def_cfa_register %r11
; CHECK: stg %r2, 176(%r11)
; CHECK-NOT: ag
; CHECK: lmg %r11, %r15, 524280(%r11)
; CHECK: br %r14
%y = alloca [65502 x i64], align 8
store volatile i64 %x, ptr %y
ret void
}
; The next frame size larger than f4.
define void @f5(i64 %x) {
; CHECK-LABEL: f5:
; CHECK: stmg %r11, %r15, 88(%r15)
; CHECK: .cfi_offset %r11, -72
; CHECK: .cfi_offset %r15, -40
; CHECK: agfi %r15, -524200
; CHECK: .cfi_def_cfa_offset 524360
; CHECK: lgr %r11, %r15
; CHECK: .cfi_def_cfa_register %r11
; CHECK: stg %r2, 176(%r11)
; CHECK: aghi %r11, 8
; CHECK: lmg %r11, %r15, 524280(%r11)
; CHECK: br %r14
%y = alloca [65503 x i64], align 8
store volatile i64 %x, ptr %y
ret void
}
; The tests above establish that %r11 is handled like %r15 for LMG.
; Rely on the %r15-based tests in frame-08.ll for other cases.
|
