fp-strict-sub-02.ll
6.85 KB
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
; Test strict 64-bit floating-point subtraction.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 \
; RUN: | FileCheck -check-prefix=CHECK -check-prefix=CHECK-SCALAR %s
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
declare double @foo()
declare double @llvm.experimental.constrained.fsub.f64(double, double, metadata, metadata)
; Check register subtraction.
define double @f1(double %f1, double %f2) #0 {
; CHECK-LABEL: f1:
; CHECK: sdbr %f0, %f2
; CHECK: br %r14
%res = call double @llvm.experimental.constrained.fsub.f64(
double %f1, double %f2,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
ret double %res
}
; Check the low end of the SDB range.
define double @f2(double %f1, double *%ptr) #0 {
; CHECK-LABEL: f2:
; CHECK: sdb %f0, 0(%r2)
; CHECK: br %r14
%f2 = load double, double *%ptr
%res = call double @llvm.experimental.constrained.fsub.f64(
double %f1, double %f2,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
ret double %res
}
; Check the high end of the aligned SDB range.
define double @f3(double %f1, double *%base) #0 {
; CHECK-LABEL: f3:
; CHECK: sdb %f0, 4088(%r2)
; CHECK: br %r14
%ptr = getelementptr double, double *%base, i64 511
%f2 = load double, double *%ptr
%res = call double @llvm.experimental.constrained.fsub.f64(
double %f1, double %f2,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
ret double %res
}
; Check the next doubleword up, which needs separate address logic.
; Other sequences besides this one would be OK.
define double @f4(double %f1, double *%base) #0 {
; CHECK-LABEL: f4:
; CHECK: aghi %r2, 4096
; CHECK: sdb %f0, 0(%r2)
; CHECK: br %r14
%ptr = getelementptr double, double *%base, i64 512
%f2 = load double, double *%ptr
%res = call double @llvm.experimental.constrained.fsub.f64(
double %f1, double %f2,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
ret double %res
}
; Check negative displacements, which also need separate address logic.
define double @f5(double %f1, double *%base) #0 {
; CHECK-LABEL: f5:
; CHECK: aghi %r2, -8
; CHECK: sdb %f0, 0(%r2)
; CHECK: br %r14
%ptr = getelementptr double, double *%base, i64 -1
%f2 = load double, double *%ptr
%res = call double @llvm.experimental.constrained.fsub.f64(
double %f1, double %f2,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
ret double %res
}
; Check that SDB allows indices.
define double @f6(double %f1, double *%base, i64 %index) #0 {
; CHECK-LABEL: f6:
; CHECK: sllg %r1, %r3, 3
; CHECK: sdb %f0, 800(%r1,%r2)
; CHECK: br %r14
%ptr1 = getelementptr double, double *%base, i64 %index
%ptr2 = getelementptr double, double *%ptr1, i64 100
%f2 = load double, double *%ptr2
%res = call double @llvm.experimental.constrained.fsub.f64(
double %f1, double %f2,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
ret double %res
}
; Check that subtractions of spilled values can use SDB rather than SDBR.
define double @f7(double *%ptr0) #0 {
; CHECK-LABEL: f7:
; CHECK: brasl %r14, foo@PLT
; CHECK-SCALAR: sdb %f0, 16{{[04]}}(%r15)
; CHECK: br %r14
%ptr1 = getelementptr double, double *%ptr0, i64 2
%ptr2 = getelementptr double, double *%ptr0, i64 4
%ptr3 = getelementptr double, double *%ptr0, i64 6
%ptr4 = getelementptr double, double *%ptr0, i64 8
%ptr5 = getelementptr double, double *%ptr0, i64 10
%ptr6 = getelementptr double, double *%ptr0, i64 12
%ptr7 = getelementptr double, double *%ptr0, i64 14
%ptr8 = getelementptr double, double *%ptr0, i64 16
%ptr9 = getelementptr double, double *%ptr0, i64 18
%ptr10 = getelementptr double, double *%ptr0, i64 20
%val0 = load double, double *%ptr0
%val1 = load double, double *%ptr1
%val2 = load double, double *%ptr2
%val3 = load double, double *%ptr3
%val4 = load double, double *%ptr4
%val5 = load double, double *%ptr5
%val6 = load double, double *%ptr6
%val7 = load double, double *%ptr7
%val8 = load double, double *%ptr8
%val9 = load double, double *%ptr9
%val10 = load double, double *%ptr10
%ret = call double @foo() #0
%sub0 = call double @llvm.experimental.constrained.fsub.f64(
double %ret, double %val0,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
%sub1 = call double @llvm.experimental.constrained.fsub.f64(
double %sub0, double %val1,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
%sub2 = call double @llvm.experimental.constrained.fsub.f64(
double %sub1, double %val2,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
%sub3 = call double @llvm.experimental.constrained.fsub.f64(
double %sub2, double %val3,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
%sub4 = call double @llvm.experimental.constrained.fsub.f64(
double %sub3, double %val4,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
%sub5 = call double @llvm.experimental.constrained.fsub.f64(
double %sub4, double %val5,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
%sub6 = call double @llvm.experimental.constrained.fsub.f64(
double %sub5, double %val6,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
%sub7 = call double @llvm.experimental.constrained.fsub.f64(
double %sub6, double %val7,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
%sub8 = call double @llvm.experimental.constrained.fsub.f64(
double %sub7, double %val8,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
%sub9 = call double @llvm.experimental.constrained.fsub.f64(
double %sub8, double %val9,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
%sub10 = call double @llvm.experimental.constrained.fsub.f64(
double %sub9, double %val10,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
ret double %sub10
}
attributes #0 = { strictfp }