1; Test strcpy using MVST.
2;
3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
4
5declare i8 *@strcpy(i8 *%dest, i8 *%src)
6declare i8 *@stpcpy(i8 *%dest, i8 *%src)
7
8; Check strcpy.
9define i8 *@f1(i8 *%dest, i8 *%src) {
10; CHECK-LABEL: f1:
11; CHECK-DAG: lhi %r0, 0
12; CHECK-DAG: lgr [[REG:%r[145]]], %r2
13; CHECK: [[LABEL:\.[^:]*]]:
14; CHECK-NEXT: mvst [[REG]], %r3
15; CHECK-NEXT: jo [[LABEL]]
16; CHECK-NOT: %r2
17; CHECK: br %r14
18  %res = call i8 *@strcpy(i8 *%dest, i8 *%src)
19  ret i8 *%res
20}
21
22; Check stpcpy.
23define i8 *@f2(i8 *%dest, i8 *%src) {
24; CHECK-LABEL: f2:
25; CHECK: lhi %r0, 0
26; CHECK: [[LABEL:\.[^:]*]]:
27; CHECK-NEXT: mvst %r2, %r3
28; CHECK-NEXT: jo [[LABEL]]
29; CHECK-NOT: %r2
30; CHECK: br %r14
31  %res = call i8 *@stpcpy(i8 *%dest, i8 *%src)
32  ret i8 *%res
33}
34
35; Check correct operation with other loads and stores.  The load must
36; come before the loop and the store afterwards.
37define i32 @f3(i32 %dummy, i8 *%dest, i8 *%src, i32 *%resptr, i32 *%storeptr) {
38; CHECK-LABEL: f3:
39; CHECK-DAG: lhi %r0, 0
40; CHECK-DAG: l %r2, 0(%r5)
41; CHECK: [[LABEL:\.[^:]*]]:
42; CHECK-NEXT: mvst %r3, %r4
43; CHECK-NEXT: jo [[LABEL]]
44; CHECK: mvhi 0(%r6), 0
45; CHECK: br %r14
46  %res = load i32 , i32 *%resptr
47  %unused = call i8 *@strcpy(i8 *%dest, i8 *%src)
48  store i32 0, i32 *%storeptr
49  ret i32 %res
50}
51