1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
; RUN: llc -mtriple=arm-eabi -mattr=+v6t2 %s -o - | FileCheck %s
define i32 @f1(i32 %a) {
entry:
; CHECK-LABEL: f1:
; CHECK: sbfx r0, r0, #0, #20
%tmp = shl i32 %a, 12
%tmp2 = ashr i32 %tmp, 12
ret i32 %tmp2
}
define i32 @f2(i32 %a) {
entry:
; CHECK-LABEL: f2:
; CHECK: bfc r0, #20, #12
%tmp = shl i32 %a, 12
%tmp2 = lshr i32 %tmp, 12
ret i32 %tmp2
}
define i32 @f3(i32 %a) {
entry:
; CHECK-LABEL: f3:
; CHECK: sbfx r0, r0, #5, #3
%tmp = shl i32 %a, 24
%tmp2 = ashr i32 %tmp, 29
ret i32 %tmp2
}
define i32 @f4(i32 %a) {
entry:
; CHECK-LABEL: f4:
; CHECK: ubfx r0, r0, #5, #3
%tmp = shl i32 %a, 24
%tmp2 = lshr i32 %tmp, 29
ret i32 %tmp2
}
define i32 @f5(i32 %a) {
entry:
; CHECK-LABEL: f5:
; CHECK-NOT: sbfx
; CHECK: bx
%tmp = shl i32 %a, 3
%tmp2 = ashr i32 %tmp, 1
ret i32 %tmp2
}
|
