1; Testg 64-bit signed division and remainder.
2;
3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
4
5declare i64 @foo()
6
7; Testg register division.  The result is in the second of the two registers.
8define void @f1(i64 %dummy, i64 %a, i64 %b, i64 *%dest) {
9; CHECK-LABEL: f1:
10; CHECK-NOT: {{%r[234]}}
11; CHECK: dsgr %r2, %r4
12; CHECK: stg %r3, 0(%r5)
13; CHECK: br %r14
14  %div = sdiv i64 %a, %b
15  store i64 %div, i64 *%dest
16  ret void
17}
18
19; Testg register remainder.  The result is in the first of the two registers.
20define void @f2(i64 %dummy, i64 %a, i64 %b, i64 *%dest) {
21; CHECK-LABEL: f2:
22; CHECK-NOT: {{%r[234]}}
23; CHECK: dsgr %r2, %r4
24; CHECK: stg %r2, 0(%r5)
25; CHECK: br %r14
26  %rem = srem i64 %a, %b
27  store i64 %rem, i64 *%dest
28  ret void
29}
30
31; Testg that division and remainder use a single instruction.
32define i64 @f3(i64 %dummy1, i64 %a, i64 %b) {
33; CHECK-LABEL: f3:
34; CHECK-NOT: {{%r[234]}}
35; CHECK: dsgr %r2, %r4
36; CHECK-NOT: dsgr
37; CHECK: ogr %r2, %r3
38; CHECK: br %r14
39  %div = sdiv i64 %a, %b
40  %rem = srem i64 %a, %b
41  %or = or i64 %rem, %div
42  ret i64 %or
43}
44
45; Testg memory division with no displacement.
46define void @f4(i64 %dummy, i64 %a, i64 *%src, i64 *%dest) {
47; CHECK-LABEL: f4:
48; CHECK-NOT: {{%r[234]}}
49; CHECK: dsg %r2, 0(%r4)
50; CHECK: stg %r3, 0(%r5)
51; CHECK: br %r14
52  %b = load i64 *%src
53  %div = sdiv i64 %a, %b
54  store i64 %div, i64 *%dest
55  ret void
56}
57
58; Testg memory remainder with no displacement.
59define void @f5(i64 %dummy, i64 %a, i64 *%src, i64 *%dest) {
60; CHECK-LABEL: f5:
61; CHECK-NOT: {{%r[234]}}
62; CHECK: dsg %r2, 0(%r4)
63; CHECK: stg %r2, 0(%r5)
64; CHECK: br %r14
65  %b = load i64 *%src
66  %rem = srem i64 %a, %b
67  store i64 %rem, i64 *%dest
68  ret void
69}
70
71; Testg both memory division and memory remainder.
72define i64 @f6(i64 %dummy, i64 %a, i64 *%src) {
73; CHECK-LABEL: f6:
74; CHECK-NOT: {{%r[234]}}
75; CHECK: dsg %r2, 0(%r4)
76; CHECK-NOT: {{dsg|dsgr}}
77; CHECK: ogr %r2, %r3
78; CHECK: br %r14
79  %b = load i64 *%src
80  %div = sdiv i64 %a, %b
81  %rem = srem i64 %a, %b
82  %or = or i64 %rem, %div
83  ret i64 %or
84}
85
86; Check the high end of the DSG range.
87define i64 @f7(i64 %dummy, i64 %a, i64 *%src) {
88; CHECK-LABEL: f7:
89; CHECK: dsg %r2, 524280(%r4)
90; CHECK: br %r14
91  %ptr = getelementptr i64 *%src, i64 65535
92  %b = load i64 *%ptr
93  %rem = srem i64 %a, %b
94  ret i64 %rem
95}
96
97; Check the next doubleword up, which needs separate address logic.
98; Other sequences besides this one would be OK.
99define i64 @f8(i64 %dummy, i64 %a, i64 *%src) {
100; CHECK-LABEL: f8:
101; CHECK: agfi %r4, 524288
102; CHECK: dsg %r2, 0(%r4)
103; CHECK: br %r14
104  %ptr = getelementptr i64 *%src, i64 65536
105  %b = load i64 *%ptr
106  %rem = srem i64 %a, %b
107  ret i64 %rem
108}
109
110; Check the high end of the negative aligned DSG range.
111define i64 @f9(i64 %dummy, i64 %a, i64 *%src) {
112; CHECK-LABEL: f9:
113; CHECK: dsg %r2, -8(%r4)
114; CHECK: br %r14
115  %ptr = getelementptr i64 *%src, i64 -1
116  %b = load i64 *%ptr
117  %rem = srem i64 %a, %b
118  ret i64 %rem
119}
120
121; Check the low end of the DSG range.
122define i64 @f10(i64 %dummy, i64 %a, i64 *%src) {
123; CHECK-LABEL: f10:
124; CHECK: dsg %r2, -524288(%r4)
125; CHECK: br %r14
126  %ptr = getelementptr i64 *%src, i64 -65536
127  %b = load i64 *%ptr
128  %rem = srem i64 %a, %b
129  ret i64 %rem
130}
131
132; Check the next doubleword down, which needs separate address logic.
133; Other sequences besides this one would be OK.
134define i64 @f11(i64 %dummy, i64 %a, i64 *%src) {
135; CHECK-LABEL: f11:
136; CHECK: agfi %r4, -524296
137; CHECK: dsg %r2, 0(%r4)
138; CHECK: br %r14
139  %ptr = getelementptr i64 *%src, i64 -65537
140  %b = load i64 *%ptr
141  %rem = srem i64 %a, %b
142  ret i64 %rem
143}
144
145; Check that DSG allows an index.
146define i64 @f12(i64 %dummy, i64 %a, i64 %src, i64 %index) {
147; CHECK-LABEL: f12:
148; CHECK: dsg %r2, 524287(%r5,%r4)
149; CHECK: br %r14
150  %add1 = add i64 %src, %index
151  %add2 = add i64 %add1, 524287
152  %ptr = inttoptr i64 %add2 to i64 *
153  %b = load i64 *%ptr
154  %rem = srem i64 %a, %b
155  ret i64 %rem
156}
157
158; Check that divisions of spilled values can use DSG rather than DSGR.
159define i64 @f13(i64 *%ptr0) {
160; CHECK-LABEL: f13:
161; CHECK: brasl %r14, foo@PLT
162; CHECK: dsg {{%r[0-9]+}}, 160(%r15)
163; CHECK: br %r14
164  %ptr1 = getelementptr i64 *%ptr0, i64 2
165  %ptr2 = getelementptr i64 *%ptr0, i64 4
166  %ptr3 = getelementptr i64 *%ptr0, i64 6
167  %ptr4 = getelementptr i64 *%ptr0, i64 8
168  %ptr5 = getelementptr i64 *%ptr0, i64 10
169  %ptr6 = getelementptr i64 *%ptr0, i64 12
170  %ptr7 = getelementptr i64 *%ptr0, i64 14
171  %ptr8 = getelementptr i64 *%ptr0, i64 16
172  %ptr9 = getelementptr i64 *%ptr0, i64 18
173  %ptr10 = getelementptr i64 *%ptr0, i64 20
174
175  %val0 = load i64 *%ptr0
176  %val1 = load i64 *%ptr1
177  %val2 = load i64 *%ptr2
178  %val3 = load i64 *%ptr3
179  %val4 = load i64 *%ptr4
180  %val5 = load i64 *%ptr5
181  %val6 = load i64 *%ptr6
182  %val7 = load i64 *%ptr7
183  %val8 = load i64 *%ptr8
184  %val9 = load i64 *%ptr9
185  %val10 = load i64 *%ptr10
186
187  %ret = call i64 @foo()
188
189  %div0 = sdiv i64 %ret, %val0
190  %div1 = sdiv i64 %div0, %val1
191  %div2 = sdiv i64 %div1, %val2
192  %div3 = sdiv i64 %div2, %val3
193  %div4 = sdiv i64 %div3, %val4
194  %div5 = sdiv i64 %div4, %val5
195  %div6 = sdiv i64 %div5, %val6
196  %div7 = sdiv i64 %div6, %val7
197  %div8 = sdiv i64 %div7, %val8
198  %div9 = sdiv i64 %div8, %val9
199  %div10 = sdiv i64 %div9, %val10
200
201  ret i64 %div10
202}
203