1; RUN: llc -mtriple=thumbv8 %s -o -       | FileCheck %s --check-prefixes=CHECK,T2
2; RUN: llc -mtriple=thumbv8m.main %s -o - | FileCheck %s --check-prefixes=CHECK,T2
3; RUN: llc -mtriple=thumbv8m.base %s -o - | FileCheck %s --check-prefixes=CHECK,T1
4; RUN: llc -mtriple=thumbv7em %s -o -     | FileCheck %s --check-prefixes=CHECK,T2
5; RUN: llc -mtriple=thumbv6m %s -o -      | FileCheck %s --check-prefixes=V6M
6
7; Armv6m targets don't have a sdiv instruction, so sdiv should not appear at
8; all in the output:
9
10; V6M: .file {{.*}}
11; V6M-NOT:  sdiv
12; V6M-NOT:  idiv
13
14; Test sdiv i16
15define dso_local signext i16 @f0(i16 signext %F) local_unnamed_addr #0 {
16; CHECK-LABEL: f0
17; CHECK:       movs    r1, #2
18; CHECK-NEXT:  sdiv    r0, r0, r1
19; CHECK-NEXT:  sxth    r0, r0
20; CHECK-NEXT:  bx      lr
21
22entry:
23  %0 = sdiv i16 %F, 2
24  ret i16 %0
25}
26
27; Same as above, but now with i32
28define dso_local i32 @f1(i32 %F) local_unnamed_addr #0 {
29; CHECK-LABEL: f1
30; CHECK:       movs    r1, #4
31; CHECK-NEXT:  sdiv    r0, r0, r1
32; CHECK-NEXT:  bx      lr
33
34entry:
35  %div = sdiv i32 %F, 4
36  ret i32 %div
37}
38
39; The immediate is not a power of 2, so we expect a sdiv.
40define dso_local i32 @f2(i32 %F) local_unnamed_addr #0 {
41; CHECK-LABEL: f2
42; CHECK:       movs    r1, #5
43; CHECK-NEXT:  sdiv    r0, r0, r1
44; CHECK-NEXT:  bx      lr
45
46entry:
47  %div = sdiv i32 %F, 5
48  ret i32 %div
49}
50
51; Try a larger power of 2 immediate: immediates larger than
52; 128 don't give any code size savings.
53define dso_local i32 @f3(i32 %F) local_unnamed_addr #0 {
54; CHECK-LABEL:  f3
55; CHECK-NOT:    sdiv
56entry:
57  %div = sdiv i32 %F, 256
58  ret i32 %div
59}
60
61attributes #0 = { minsize norecurse nounwind optsize readnone }
62
63
64; These functions don't have the minsize attribute set, so should not lower
65; the sdiv to sdiv, but to the faster instruction sequence.
66
67define dso_local signext i16 @f4(i16 signext %F) {
68; T2-LABEL:  f4
69; T2:        uxth    r1, r0
70; T2-NEXT:   add.w   r0, r0, r1, lsr #15
71; T2-NEXT:   sxth    r0, r0
72; T2-NEXT:   asrs    r0, r0, #1
73; T2-NEXT:   bx      lr
74
75; T1-LABEL: f4
76; T1: 	    uxth  r1, r0
77; T1-NEXT: 	lsrs  r1, r1, #15
78; T1-NEXT: 	adds  r0, r0, r1
79; T1-NEXT: 	sxth  r0, r0
80; T1-NEXT: 	asrs  r0, r0, #1
81; T1-NEXT: 	bx	lr
82
83entry:
84  %0 = sdiv i16 %F, 2
85  ret i16 %0
86}
87
88define dso_local i32 @f5(i32 %F) {
89; T2-LABEL: f5
90; T2:       asrs  r1, r0, #31
91; T2-NEXT:  add.w   r0, r0, r1, lsr #30
92; T2-NEXT:  asrs    r0, r0, #2
93; T2-NEXT:  bx      lr
94
95; T1-LABEL: f5
96; T1: 	    asrs r1, r0, #31
97; T1-NEXT:	lsrs  r1, r1, #30
98; T1-NEXT:	adds  r0, r0, r1
99; T1-NEXT:	asrs  r0, r0, #2
100; T1-NEXT:	bx  lr
101
102entry:
103  %div = sdiv i32 %F, 4
104  ret i32 %div
105}
106