1; Test 64-bit byteswaps from registers to memory.
2;
3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
4
5declare i64 @llvm.bswap.i64(i64 %a)
6
7; Check STRVG with no displacement.
8define void @f1(i64 *%dst, i64 %a) {
9; CHECK-LABEL: f1:
10; CHECK: strvg %r3, 0(%r2)
11; CHECK: br %r14
12  %swapped = call i64 @llvm.bswap.i64(i64 %a)
13  store i64 %swapped, i64 *%dst
14  ret void
15}
16
17; Check the high end of the aligned STRVG range.
18define void @f2(i64 *%dst, i64 %a) {
19; CHECK-LABEL: f2:
20; CHECK: strvg %r3, 524280(%r2)
21; CHECK: br %r14
22  %ptr = getelementptr i64 *%dst, i64 65535
23  %swapped = call i64 @llvm.bswap.i64(i64 %a)
24  store i64 %swapped, i64 *%ptr
25  ret void
26}
27
28; Check the next doubleword up, which needs separate address logic.
29; Other sequences besides this one would be OK.
30define void @f3(i64 *%dst, i64 %a) {
31; CHECK-LABEL: f3:
32; CHECK: agfi %r2, 524288
33; CHECK: strvg %r3, 0(%r2)
34; CHECK: br %r14
35  %ptr = getelementptr i64 *%dst, i64 65536
36  %swapped = call i64 @llvm.bswap.i64(i64 %a)
37  store i64 %swapped, i64 *%ptr
38  ret void
39}
40
41; Check the high end of the negative aligned STRVG range.
42define void @f4(i64 *%dst, i64 %a) {
43; CHECK-LABEL: f4:
44; CHECK: strvg %r3, -8(%r2)
45; CHECK: br %r14
46  %ptr = getelementptr i64 *%dst, i64 -1
47  %swapped = call i64 @llvm.bswap.i64(i64 %a)
48  store i64 %swapped, i64 *%ptr
49  ret void
50}
51
52; Check the low end of the STRVG range.
53define void @f5(i64 *%dst, i64 %a) {
54; CHECK-LABEL: f5:
55; CHECK: strvg %r3, -524288(%r2)
56; CHECK: br %r14
57  %ptr = getelementptr i64 *%dst, i64 -65536
58  %swapped = call i64 @llvm.bswap.i64(i64 %a)
59  store i64 %swapped, i64 *%ptr
60  ret void
61}
62
63; Check the next doubleword down, which needs separate address logic.
64; Other sequences besides this one would be OK.
65define void @f6(i64 *%dst, i64 %a) {
66; CHECK-LABEL: f6:
67; CHECK: agfi %r2, -524296
68; CHECK: strvg %r3, 0(%r2)
69; CHECK: br %r14
70  %ptr = getelementptr i64 *%dst, i64 -65537
71  %swapped = call i64 @llvm.bswap.i64(i64 %a)
72  store i64 %swapped, i64 *%ptr
73  ret void
74}
75
76; Check that STRVG allows an index.
77define void @f7(i64 %src, i64 %index, i64 %a) {
78; CHECK-LABEL: f7:
79; CHECK: strvg %r4, 524287({{%r3,%r2|%r2,%r3}})
80; CHECK: br %r14
81  %add1 = add i64 %src, %index
82  %add2 = add i64 %add1, 524287
83  %ptr = inttoptr i64 %add2 to i64 *
84  %swapped = call i64 @llvm.bswap.i64(i64 %a)
85  store i64 %swapped, i64 *%ptr
86  ret void
87}
88
89; Check that volatile stores do not use STRVG, which might access the
90; storage multple times.
91define void @f8(i64 *%dst, i64 %a) {
92; CHECK-LABEL: f8:
93; CHECK: lrvgr [[REG:%r[0-5]]], %r3
94; CHECK: stg [[REG]], 0(%r2)
95; CHECK: br %r14
96  %swapped = call i64 @llvm.bswap.i64(i64 %a)
97  store volatile i64 %swapped, i64 *%dst
98  ret void
99}
100