1; RUN: llc -mtriple=aarch64-none-linux-gnu < %s | FileCheck %s
2
3; CHECK-LABEL: @test1
4; CHECK: sbfx {{x[0-9]+}}, x0, #23, #9
5define i64 @test1(i32 %a) {
6  %tmp = ashr i32 %a, 23
7  %ext = sext i32 %tmp to i64
8  %res = add i64 %ext, 1
9  ret i64 %res
10}
11
12; CHECK-LABEL: @test2
13; CHECK: sbfx w0, w0, #23, #8
14define signext i8 @test2(i32 %a) {
15  %tmp = ashr i32 %a, 23
16  %res = trunc i32 %tmp to i8
17  ret i8 %res
18}
19
20; CHECK-LABEL: @test3
21; CHECK: sbfx w0, w0, #23, #8
22define signext i8 @test3(i32 %a) {
23  %tmp = lshr i32 %a, 23
24  %res = trunc i32 %tmp to i8
25  ret i8 %res
26}
27
28; CHECK-LABEL: @test4
29; CHECK: sbfx w0, w0, #15, #16
30define signext i16 @test4(i32 %a) {
31  %tmp = lshr i32 %a, 15
32  %res = trunc i32 %tmp to i16
33  ret i16 %res
34}
35
36; CHECK-LABEL: @test5
37; CHECK: sbfx w0, w0, #16, #8
38define signext i8 @test5(i64 %a) {
39  %tmp = lshr i64 %a, 16
40  %res = trunc i64 %tmp to i8
41  ret i8 %res
42}
43
44; CHECK-LABEL: @test6
45; CHECK: sbfx x0, x0, #30, #8
46define signext i8 @test6(i64 %a) {
47  %tmp = lshr i64 %a, 30
48  %res = trunc i64 %tmp to i8
49  ret i8 %res
50}
51
52; CHECK-LABEL: @test7
53; CHECK: sbfx x0, x0, #23, #16
54define signext i16 @test7(i64 %a) {
55  %tmp = lshr i64 %a, 23
56  %res = trunc i64 %tmp to i16
57  ret i16 %res
58}
59
60; CHECK-LABEL: @test8
61; CHECK: asr w0, w0, #25
62define signext i8 @test8(i32 %a) {
63  %tmp = ashr i32 %a, 25
64  %res = trunc i32 %tmp to i8
65  ret i8 %res
66}
67
68; CHECK-LABEL: @test9
69; CHECK: lsr w0, w0, #25
70define signext i8 @test9(i32 %a) {
71  %tmp = lshr i32 %a, 25
72  %res = trunc i32 %tmp to i8
73  ret i8 %res
74}
75
76; CHECK-LABEL: @test10
77; CHECK: lsr x0, x0, #49
78define signext i16 @test10(i64 %a) {
79  %tmp = lshr i64 %a, 49
80  %res = trunc i64 %tmp to i16
81  ret i16 %res
82}
83
84; SHR with multiple uses is fine as SXTH and SBFX are both aliases of SBFM.
85; However, allowing the transformation means the SHR and SBFX can execute in
86; parallel.
87;
88; CHECK-LABEL: @test11
89; CHECK: lsr x1, x0, #23
90; CHECK: sbfx x0, x0, #23, #16
91define void @test11(i64 %a) {
92  %tmp = lshr i64 %a, 23
93  %res = trunc i64 %tmp to i16
94  call void @use(i16 %res, i64 %tmp)
95  ret void
96}
97
98declare void @use(i16 signext, i64)
99