1; Test memchr using SRST, with the correct prototype.
2;
3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
4
5declare i8 *@memchr(i8 *%src, i32 %char, i64 %len)
6
7; Test a simple forwarded call.
8define i8 *@f1(i64 %len, i8 *%src, i32 %char) {
9; CHECK-LABEL: f1:
10; CHECK-DAG: agr %r2, %r3
11; CHECK-DAG: llcr %r0, %r4
12; CHECK: [[LABEL:\.[^:]*]]:
13; CHECK: srst %r2, %r3
14; CHECK-NEXT: jo [[LABEL]]
15; CHECK: jl {{\.L.*}}
16; CHECK: lghi %r2, 0
17; CHECK: br %r14
18  %res = call i8 *@memchr(i8 *%src, i32 %char, i64 %len)
19  ret i8 *%res
20}
21
22; Test a doubled call with no use of %r0 in between.  There should be a
23; single load of %r0.
24define i8 *@f2(i8 *%src, i8 *%charptr, i64 %len) {
25; CHECK-LABEL: f2:
26; CHECK: llc %r0, 0(%r3)
27; CHECK-NOT: %r0
28; CHECK: srst [[RES1:%r[1-5]]], %r2
29; CHECK-NOT: %r0
30; CHECK: srst %r2, [[RES1]]
31; CHECK: br %r14
32  %char = load volatile i8 *%charptr
33  %charext = zext i8 %char to i32
34  %res1 = call i8 *@memchr(i8 *%src, i32 %charext, i64 %len)
35  %res2 = call i8 *@memchr(i8 *%res1, i32 %charext, i64 %len)
36  ret i8 *%res2
37}
38
39; Test a doubled call with a use of %r0 in between.  %r0 must be loaded
40; for each loop.
41define i8 *@f3(i8 *%src, i8 *%charptr, i64 %len) {
42; CHECK-LABEL: f3:
43; CHECK: llc [[CHAR:%r[1-5]]], 0(%r3)
44; CHECK: lr %r0, [[CHAR]]
45; CHECK: srst [[RES1:%r[1-5]]], %r2
46; CHECK: lhi %r0, 0
47; CHECK: blah %r0
48; CHECK: lr %r0, [[CHAR]]
49; CHECK: srst %r2, [[RES1]]
50; CHECK: br %r14
51  %char = load volatile i8 *%charptr
52  %charext = zext i8 %char to i32
53  %res1 = call i8 *@memchr(i8 *%src, i32 %charext, i64 %len)
54  call void asm sideeffect "blah $0", "{r0}" (i32 0)
55  %res2 = call i8 *@memchr(i8 *%res1, i32 %charext, i64 %len)
56  ret i8 *%res2
57}
58