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1; Test that we take advantage of signext and zeroext annotations.
2;
3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
4
5; Zero extension of something that is already zero-extended.
6define void @f1(i32 zeroext %r2, i64 *%r3) {
7; CHECK-LABEL: f1:
8; CHECK-NOT: %r2
9; CHECK: stg %r2, 0(%r3)
10; CHECK: br %r14
11  %conv = zext i32 %r2 to i64
12  store i64 %conv, i64* %r3
13  ret void
14}
15
16; Sign extension of something that is already sign-extended.
17define void @f2(i32 signext %r2, i64 *%r3) {
18; CHECK-LABEL: f2:
19; CHECK-NOT: %r2
20; CHECK: stg %r2, 0(%r3)
21; CHECK: br %r14
22  %conv = sext i32 %r2 to i64
23  store i64 %conv, i64* %r3
24  ret void
25}
26
27; Sign extension of something that is already zero-extended.
28define void @f3(i32 zeroext %r2, i64 *%r3) {
29; CHECK-LABEL: f3:
30; CHECK: lgfr [[REGISTER:%r[0-5]+]], %r2
31; CHECK: stg [[REGISTER]], 0(%r3)
32; CHECK: br %r14
33  %conv = sext i32 %r2 to i64
34  store i64 %conv, i64* %r3
35  ret void
36}
37
38; Zero extension of something that is already sign-extended.
39define void @f4(i32 signext %r2, i64 *%r3) {
40; CHECK-LABEL: f4:
41; CHECK: llgfr [[REGISTER:%r[0-5]+]], %r2
42; CHECK: stg [[REGISTER]], 0(%r3)
43; CHECK: br %r14
44  %conv = zext i32 %r2 to i64
45  store i64 %conv, i64* %r3
46  ret void
47}
48