1; Test shortening of NILL to NILF when the result is used as a shift amount.
2;
3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
4
5; Test logical shift right.
6define i32 @f1(i32 %a, i32 %sh) {
7; CHECK-LABEL: f1:
8; CHECK: nill %r3, 31
9; CHECK: srl %r2, 0(%r3)
10  %and = and i32 %sh, 31
11  %shift = lshr i32 %a, %and
12  ret i32 %shift
13}
14
15; Test arithmetic shift right.
16define i32 @f2(i32 %a, i32 %sh) {
17; CHECK-LABEL: f2:
18; CHECK: nill %r3, 31
19; CHECK: sra %r2, 0(%r3)
20  %and = and i32 %sh, 31
21  %shift = ashr i32 %a, %and
22  ret i32 %shift
23}
24
25; Test shift left.
26define i32 @f3(i32 %a, i32 %sh) {
27; CHECK-LABEL: f3:
28; CHECK: nill %r3, 31
29; CHECK: sll %r2, 0(%r3)
30  %and = and i32 %sh, 31
31  %shift = shl i32 %a, %and
32  ret i32 %shift
33}
34
35; Test 64-bit logical shift right.
36define i64 @f4(i64 %a, i64 %sh) {
37; CHECK-LABEL: f4:
38; CHECK: nill %r3, 31
39; CHECK: srlg %r2, %r2, 0(%r3)
40  %and = and i64 %sh, 31
41  %shift = lshr i64 %a, %and
42  ret i64 %shift
43}
44
45; Test 64-bit arithmetic shift right.
46define i64 @f5(i64 %a, i64 %sh) {
47; CHECK-LABEL: f5:
48; CHECK: nill %r3, 31
49; CHECK: srag %r2, %r2, 0(%r3)
50  %and = and i64 %sh, 31
51  %shift = ashr i64 %a, %and
52  ret i64 %shift
53}
54
55; Test 64-bit shift left.
56define i64 @f6(i64 %a, i64 %sh) {
57; CHECK-LABEL: f6:
58; CHECK: nill %r3, 31
59; CHECK: sllg %r2, %r2, 0(%r3)
60  %and = and i64 %sh, 31
61  %shift = shl i64 %a, %and
62  ret i64 %shift
63}
64