1 ; Test 64-bit subtraction in which the second operand is constant.
3 ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
4 ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
8 ; Check subtractions of 1.
9 define zeroext i1 @f1(i64 %dummy, i64 %a, i64 *%res) {
12 ; CHECK-DAG: stg %r3, 0(%r4)
13 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
14 ; CHECK-DAG: afi [[REG]], 1342177280
15 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
17 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 1)
18 %val = extractvalue {i64, i1} %t, 0
19 %obit = extractvalue {i64, i1} %t, 1
20 store i64 %val, i64 *%res
25 ; Check the high end of the SGHI range.
26 define zeroext i1 @f2(i64 %dummy, i64 %a, i64 *%res) {
28 ; CHECK: aghi %r3, -32768
29 ; CHECK-DAG: stg %r3, 0(%r4)
30 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
31 ; CHECK-DAG: afi [[REG]], 1342177280
32 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
34 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 32768)
35 %val = extractvalue {i64, i1} %t, 0
36 %obit = extractvalue {i64, i1} %t, 1
37 store i64 %val, i64 *%res
41 ; Check the next value up, which must use SGFI instead.
42 define zeroext i1 @f3(i64 %dummy, i64 %a, i64 *%res) {
44 ; CHECK: agfi %r3, -32769
45 ; CHECK-DAG: stg %r3, 0(%r4)
46 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
47 ; CHECK-DAG: afi [[REG]], 1342177280
48 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
50 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 32769)
51 %val = extractvalue {i64, i1} %t, 0
52 %obit = extractvalue {i64, i1} %t, 1
53 store i64 %val, i64 *%res
57 ; Check the high end of the SGFI range.
58 define zeroext i1 @f4(i64 %dummy, i64 %a, i64 *%res) {
60 ; CHECK: agfi %r3, -2147483648
61 ; CHECK-DAG: stg %r3, 0(%r4)
62 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
63 ; CHECK-DAG: afi [[REG]], 1342177280
64 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
66 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 2147483648)
67 %val = extractvalue {i64, i1} %t, 0
68 %obit = extractvalue {i64, i1} %t, 1
69 store i64 %val, i64 *%res
73 ; Check the next value up, which must be loaded into a register first.
74 define zeroext i1 @f5(i64 %dummy, i64 %a, i64 *%res) {
76 ; CHECK: llilf [[REG1:%r[0-9]+]], 2147483649
77 ; CHECK: sgr %r3, [[REG1]]
78 ; CHECK-DAG: stg %r3, 0(%r4)
79 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
80 ; CHECK-DAG: afi [[REG]], 1342177280
81 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
83 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 2147483649)
84 %val = extractvalue {i64, i1} %t, 0
85 %obit = extractvalue {i64, i1} %t, 1
86 store i64 %val, i64 *%res
90 ; Check the high end of the negative SGHI range.
91 define zeroext i1 @f6(i64 %dummy, i64 %a, i64 *%res) {
94 ; CHECK-DAG: stg %r3, 0(%r4)
95 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
96 ; CHECK-DAG: afi [[REG]], 1342177280
97 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
99 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 -1)
100 %val = extractvalue {i64, i1} %t, 0
101 %obit = extractvalue {i64, i1} %t, 1
102 store i64 %val, i64 *%res
106 ; Check the low end of the SGHI range.
107 define zeroext i1 @f7(i64 %dummy, i64 %a, i64 *%res) {
109 ; CHECK: aghi %r3, 32767
110 ; CHECK-DAG: stg %r3, 0(%r4)
111 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
112 ; CHECK-DAG: afi [[REG]], 1342177280
113 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
115 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 -32767)
116 %val = extractvalue {i64, i1} %t, 0
117 %obit = extractvalue {i64, i1} %t, 1
118 store i64 %val, i64 *%res
122 ; Check the next value down, which must use SGFI instead.
123 define zeroext i1 @f8(i64 %dummy, i64 %a, i64 *%res) {
125 ; CHECK: agfi %r3, 32768
126 ; CHECK-DAG: stg %r3, 0(%r4)
127 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
128 ; CHECK-DAG: afi [[REG]], 1342177280
129 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
131 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 -32768)
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 SGFI range.
139 define zeroext i1 @f9(i64 %dummy, i64 %a, i64 *%res) {
141 ; CHECK: agfi %r3, 2147483647
142 ; CHECK-DAG: stg %r3, 0(%r4)
143 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
144 ; CHECK-DAG: afi [[REG]], 1342177280
145 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
147 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 -2147483647)
148 %val = extractvalue {i64, i1} %t, 0
149 %obit = extractvalue {i64, i1} %t, 1
150 store i64 %val, i64 *%res
154 ; Check the next value down, which must use register subtraction instead.
155 define zeroext i1 @f10(i64 %dummy, i64 %a, i64 *%res) {
157 ; CHECK: llilh [[REG1:%r[0-9]+]], 32768
158 ; CHECK: agr [[REG1]], %r3
159 ; CHECK-DAG: stg [[REG1]], 0(%r4)
160 ; CHECK-DAG: ipm [[REG:%r[0-5]]]
161 ; CHECK-DAG: afi [[REG]], 1342177280
162 ; CHECK-DAG: risbg %r2, [[REG]], 63, 191, 33
164 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 -2147483648)
165 %val = extractvalue {i64, i1} %t, 0
166 %obit = extractvalue {i64, i1} %t, 1
167 store i64 %val, i64 *%res
171 ; Check using the overflow result for a branch.
172 define void @f11(i64 %dummy, i64 %a, i64 *%res) {
174 ; CHECK: aghi %r3, -1
175 ; CHECK: stg %r3, 0(%r4)
176 ; CHECK: {{jgo foo@PLT|bnor %r14}}
177 ; CHECK: {{br %r14|jg foo@PLT}}
178 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 1)
179 %val = extractvalue {i64, i1} %t, 0
180 %obit = extractvalue {i64, i1} %t, 1
181 store i64 %val, i64 *%res
182 br i1 %obit, label %call, label %exit
192 ; ... and the same with the inverted direction.
193 define void @f12(i64 %dummy, i64 %a, i64 *%res) {
195 ; CHECK: aghi %r3, -1
196 ; CHECK: stg %r3, 0(%r4)
197 ; CHECK: {{jgno foo@PLT|bor %r14}}
198 ; CHECK: {{br %r14|jg foo@PLT}}
199 %t = call {i64, i1} @llvm.ssub.with.overflow.i64(i64 %a, i64 1)
200 %val = extractvalue {i64, i1} %t, 0
201 %obit = extractvalue {i64, i1} %t, 1
202 store i64 %val, i64 *%res
203 br i1 %obit, label %exit, label %call
213 declare {i64, i1} @llvm.ssub.with.overflow.i64(i64, i64) nounwind readnone