1; Test data prefetching.
2;
3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
4
5declare void @llvm.prefetch(i8*, i32, i32, i32)
6
7@g = global [4096 x i8] zeroinitializer
8
9; Check that instruction read prefetches are ignored.
10define void @f1(i8 *%ptr) {
11; CHECK-LABEL: f1:
12; CHECK-NOT: %r2
13; CHECK: br %r14
14  call void @llvm.prefetch(i8 *%ptr, i32 0, i32 0, i32 0)
15  ret void
16}
17
18; Check that instruction write prefetches are ignored.
19define void @f2(i8 *%ptr) {
20; CHECK-LABEL: f2:
21; CHECK-NOT: %r2
22; CHECK: br %r14
23  call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 0)
24  ret void
25}
26
27; Check data read prefetches.
28define void @f3(i8 *%ptr) {
29; CHECK-LABEL: f3:
30; CHECK: pfd 1, 0(%r2)
31; CHECK: br %r14
32  call void @llvm.prefetch(i8 *%ptr, i32 0, i32 0, i32 1)
33  ret void
34}
35
36; Check data write prefetches.
37define void @f4(i8 *%ptr) {
38; CHECK-LABEL: f4:
39; CHECK: pfd 2, 0(%r2)
40; CHECK: br %r14
41  call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1)
42  ret void
43}
44
45; Check an address at the negative end of the range.
46define void @f5(i8 *%base, i64 %index) {
47; CHECK-LABEL: f5:
48; CHECK: pfd 2, -524288({{%r2,%r3|%r3,%r2}})
49; CHECK: br %r14
50  %add = add i64 %index, -524288
51  %ptr = getelementptr i8, i8 *%base, i64 %add
52  call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1)
53  ret void
54}
55
56; Check an address at the positive end of the range.
57define void @f6(i8 *%base, i64 %index) {
58; CHECK-LABEL: f6:
59; CHECK: pfd 2, 524287({{%r2,%r3|%r3,%r2}})
60; CHECK: br %r14
61  %add = add i64 %index, 524287
62  %ptr = getelementptr i8, i8 *%base, i64 %add
63  call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1)
64  ret void
65}
66
67; Check that the next address up still compiles.
68define void @f7(i8 *%base, i64 %index) {
69; CHECK-LABEL: f7:
70; CHECK: 524288
71; CHECK: pfd 2,
72; CHECK: br %r14
73  %add = add i64 %index, 524288
74  %ptr = getelementptr i8, i8 *%base, i64 %add
75  call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1)
76  ret void
77}
78
79; Check pc-relative prefetches.
80define void @f8() {
81; CHECK-LABEL: f8:
82; CHECK: pfdrl 2, g
83; CHECK: br %r14
84  %ptr = getelementptr [4096 x i8], [4096 x i8] *@g, i64 0, i64 0
85  call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1)
86  ret void
87}
88