loop-align-cortex-m.ll
1.38 KB
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
48
49
; RUN: llc -mtriple=thumbv7m-none-eabi %s -mcpu=cortex-m3 -o - | FileCheck %s
; RUN: llc -mtriple=thumbv7m-none-eabi %s -mcpu=cortex-m4 -o - | FileCheck %s
; RUN: llc -mtriple=thumbv8m-none-eabi %s -mcpu=cortex-m33 -o - | FileCheck %s
define void @test_loop_alignment(i32* %in, i32* %out) optsize {
; CHECK-LABEL: test_loop_alignment:
; CHECK: mov{{.*}}, #0
; CHECK: .p2align 2
entry:
br label %loop
loop:
%i = phi i32 [ 0, %entry ], [ %i.next, %loop ]
%in.addr = getelementptr inbounds i32, i32* %in, i32 %i
%lhs = load i32, i32* %in.addr, align 4
%res = mul nsw i32 %lhs, 5
%out.addr = getelementptr inbounds i32, i32* %out, i32 %i
store i32 %res, i32* %out.addr, align 4
%i.next = add i32 %i, 1
%done = icmp eq i32 %i.next, 1024
br i1 %done, label %end, label %loop
end:
ret void
}
define void @test_loop_alignment_minsize(i32* %in, i32* %out) minsize {
; CHECK-LABEL: test_loop_alignment_minsize:
; CHECK: movs {{r[0-9]+}}, #0
; CHECK-NOT: .p2align
entry:
br label %loop
loop:
%i = phi i32 [ 0, %entry ], [ %i.next, %loop ]
%in.addr = getelementptr inbounds i32, i32* %in, i32 %i
%lhs = load i32, i32* %in.addr, align 4
%res = mul nsw i32 %lhs, 5
%out.addr = getelementptr inbounds i32, i32* %out, i32 %i
store i32 %res, i32* %out.addr, align 4
%i.next = add i32 %i, 1
%done = icmp eq i32 %i.next, 1024
br i1 %done, label %end, label %loop
end:
ret void
}