1 ; Test 64-bit subtraction in which the second operand is variable.
3 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
8 define zeroext i1 @f1(i64 %dummy, i64 %a, i64 %b, i64 *%res) {
11 ; CHECK-DAG: stg %r3, 0(%r5)
12 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
13 ; CHECK-DAG: afi [[REG]], 1342177280
14 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
16 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
17 %val = extractvalue {i64, i1} %t, 0
18 %obit = extractvalue {i64, i1} %t, 1
19 store i64 %val, i64 *%res
23 ; Check using the overflow result for a branch.
24 define void @f2(i64 %dummy, i64 %a, i64 %b, i64 *%res) {
27 ; CHECK: stg %r3, 0(%r5)
30 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
31 %val = extractvalue {i64, i1} %t, 0
32 %obit = extractvalue {i64, i1} %t, 1
33 store i64 %val, i64 *%res
34 br i1 %obit, label %call, label %exit
44 ; ... and the same with the inverted direction.
45 define void @f3(i64 %dummy, i64 %a, i64 %b, i64 *%res) {
48 ; CHECK: stg %r3, 0(%r5)
51 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
52 %val = extractvalue {i64, i1} %t, 0
53 %obit = extractvalue {i64, i1} %t, 1
54 store i64 %val, i64 *%res
55 br i1 %obit, label %exit, label %call
65 ; Check SG with no displacement.
66 define zeroext i1 @f4(i64 %dummy, i64 %a, i64 *%src, i64 *%res) {
68 ; CHECK: sg %r3, 0(%r4)
69 ; CHECK-DAG: stg %r3, 0(%r5)
70 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
71 ; CHECK-DAG: afi [[REG]], 1342177280
72 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
74 %b = load i64, i64 *%src
75 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
76 %val = extractvalue {i64, i1} %t, 0
77 %obit = extractvalue {i64, i1} %t, 1
78 store i64 %val, i64 *%res
82 ; Check the high end of the aligned SG range.
83 define zeroext i1 @f5(i64 %dummy, i64 %a, i64 *%src, i64 *%res) {
85 ; CHECK: sg %r3, 524280(%r4)
86 ; CHECK-DAG: stg %r3, 0(%r5)
87 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
88 ; CHECK-DAG: afi [[REG]], 1342177280
89 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
91 %ptr = getelementptr i64, i64 *%src, i64 65535
92 %b = load i64, i64 *%ptr
93 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
94 %val = extractvalue {i64, i1} %t, 0
95 %obit = extractvalue {i64, i1} %t, 1
96 store i64 %val, i64 *%res
100 ; Check the next doubleword up, which needs separate address logic.
101 ; Other sequences besides this one would be OK.
102 define zeroext i1 @f6(i64 %dummy, i64 %a, i64 *%src, i64 *%res) {
104 ; CHECK: agfi %r4, 524288
105 ; CHECK: sg %r3, 0(%r4)
106 ; CHECK-DAG: stg %r3, 0(%r5)
107 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
108 ; CHECK-DAG: afi [[REG]], 1342177280
109 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
111 %ptr = getelementptr i64, i64 *%src, i64 65536
112 %b = load i64, i64 *%ptr
113 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
114 %val = extractvalue {i64, i1} %t, 0
115 %obit = extractvalue {i64, i1} %t, 1
116 store i64 %val, i64 *%res
120 ; Check the high end of the negative aligned SG range.
121 define zeroext i1 @f7(i64 %dummy, i64 %a, i64 *%src, i64 *%res) {
123 ; CHECK: sg %r3, -8(%r4)
124 ; CHECK-DAG: stg %r3, 0(%r5)
125 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
126 ; CHECK-DAG: afi [[REG]], 1342177280
127 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
129 %ptr = getelementptr i64, i64 *%src, i64 -1
130 %b = load i64, i64 *%ptr
131 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
132 %val = extractvalue {i64, i1} %t, 0
133 %obit = extractvalue {i64, i1} %t, 1
134 store i64 %val, i64 *%res
138 ; Check the low end of the SG range.
139 define zeroext i1 @f8(i64 %dummy, i64 %a, i64 *%src, i64 *%res) {
141 ; CHECK: sg %r3, -524288(%r4)
142 ; CHECK-DAG: stg %r3, 0(%r5)
143 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
144 ; CHECK-DAG: afi [[REG]], 1342177280
145 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
147 %ptr = getelementptr i64, i64 *%src, i64 -65536
148 %b = load i64, i64 *%ptr
149 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
150 %val = extractvalue {i64, i1} %t, 0
151 %obit = extractvalue {i64, i1} %t, 1
152 store i64 %val, i64 *%res
156 ; Check the next word down, which needs separate address logic.
157 ; Other sequences besides this one would be OK.
158 define zeroext i1 @f9(i64 %dummy, i64 %a, i64 *%src, i64 *%res) {
160 ; CHECK: agfi %r4, -524296
161 ; CHECK: sg %r3, 0(%r4)
162 ; CHECK-DAG: stg %r3, 0(%r5)
163 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
164 ; CHECK-DAG: afi [[REG]], 1342177280
165 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
167 %ptr = getelementptr i64, i64 *%src, i64 -65537
168 %b = load i64, i64 *%ptr
169 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
170 %val = extractvalue {i64, i1} %t, 0
171 %obit = extractvalue {i64, i1} %t, 1
172 store i64 %val, i64 *%res
176 ; Check that SG allows an index.
177 define zeroext i1 @f10(i64 %src, i64 %index, i64 %a, i64 *%res) {
179 ; CHECK: sg %r4, 524280({{%r3,%r2|%r2,%r3}})
180 ; CHECK-DAG: stg %r4, 0(%r5)
181 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
182 ; CHECK-DAG: afi [[REG]], 1342177280
183 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
185 %add1 = add i64 %src, %index
186 %add2 = add i64 %add1, 524280
187 %ptr = inttoptr i64 %add2 to i64 *
188 %b = load i64, i64 *%ptr
189 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 %b)
190 %val = extractvalue {i64, i1} %t, 0
191 %obit = extractvalue {i64, i1} %t, 1
192 store i64 %val, i64 *%res
196 ; Check that subtractions of spilled values can use SG rather than SGR.
197 define zeroext i1 @f11(i64 *%ptr0) {
199 ; CHECK: brasl %r14, foo@PLT
200 ; CHECK: sg %r2, 16{{[04]}}(%r15)
202 %ptr1 = getelementptr i64, i64 *%ptr0, i64 2
203 %ptr2 = getelementptr i64, i64 *%ptr0, i64 4
204 %ptr3 = getelementptr i64, i64 *%ptr0, i64 6
205 %ptr4 = getelementptr i64, i64 *%ptr0, i64 8
206 %ptr5 = getelementptr i64, i64 *%ptr0, i64 10
207 %ptr6 = getelementptr i64, i64 *%ptr0, i64 12
208 %ptr7 = getelementptr i64, i64 *%ptr0, i64 14
209 %ptr8 = getelementptr i64, i64 *%ptr0, i64 16
210 %ptr9 = getelementptr i64, i64 *%ptr0, i64 18
212 %val0 = load i64, i64 *%ptr0
213 %val1 = load i64, i64 *%ptr1
214 %val2 = load i64, i64 *%ptr2
215 %val3 = load i64, i64 *%ptr3
216 %val4 = load i64, i64 *%ptr4
217 %val5 = load i64, i64 *%ptr5
218 %val6 = load i64, i64 *%ptr6
219 %val7 = load i64, i64 *%ptr7
220 %val8 = load i64, i64 *%ptr8
221 %val9 = load i64, i64 *%ptr9
223 %ret = call i64 @foo()
225 %t0 = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %ret, i64 %val0)
226 %add0 = extractvalue {i64, i1} %t0, 0
227 %obit0 = extractvalue {i64, i1} %t0, 1
228 %t1 = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %add0, i64 %val1)
229 %add1 = extractvalue {i64, i1} %t1, 0
230 %obit1 = extractvalue {i64, i1} %t1, 1
231 %res1 = or i1 %obit0, %obit1
232 %t2 = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %add1, i64 %val2)
233 %add2 = extractvalue {i64, i1} %t2, 0
234 %obit2 = extractvalue {i64, i1} %t2, 1
235 %res2 = or i1 %res1, %obit2
236 %t3 = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %add2, i64 %val3)
237 %add3 = extractvalue {i64, i1} %t3, 0
238 %obit3 = extractvalue {i64, i1} %t3, 1
239 %res3 = or i1 %res2, %obit3
240 %t4 = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %add3, i64 %val4)
241 %add4 = extractvalue {i64, i1} %t4, 0
242 %obit4 = extractvalue {i64, i1} %t4, 1
243 %res4 = or i1 %res3, %obit4
244 %t5 = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %add4, i64 %val5)
245 %add5 = extractvalue {i64, i1} %t5, 0
246 %obit5 = extractvalue {i64, i1} %t5, 1
247 %res5 = or i1 %res4, %obit5
248 %t6 = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %add5, i64 %val6)
249 %add6 = extractvalue {i64, i1} %t6, 0
250 %obit6 = extractvalue {i64, i1} %t6, 1
251 %res6 = or i1 %res5, %obit6
252 %t7 = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %add6, i64 %val7)
253 %add7 = extractvalue {i64, i1} %t7, 0
254 %obit7 = extractvalue {i64, i1} %t7, 1
255 %res7 = or i1 %res6, %obit7
256 %t8 = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %add7, i64 %val8)
257 %add8 = extractvalue {i64, i1} %t8, 0
258 %obit8 = extractvalue {i64, i1} %t8, 1
259 %res8 = or i1 %res7, %obit8
260 %t9 = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %add8, i64 %val9)
261 %add9 = extractvalue {i64, i1} %t9, 0
262 %obit9 = extractvalue {i64, i1} %t9, 1
263 %res9 = or i1 %res8, %obit9
268 declare {i64, i1} @llvm.ssub.with.overflow.i64(i64, i64) nounwind readnone