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
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
; RUN: llc -march=bpfel -o - %s | FileCheck %s
; RUN: llc -march=bpfeb -o - %s | FileCheck %s
; Source code:
; struct ipv6_key_t {
; unsigned pid;
; unsigned __int128 saddr;
; unsigned short lport;
; };
;
; extern void test1(ptr);
; int test(int pid) {
; struct ipv6_key_t ipv6_key = {.pid = pid};
; test1(&ipv6_key);
; return 0;
; }
; Compilation flag:
; clang -target bpf -O2 -S -emit-llvm t.c
%struct.ipv6_key_t = type { i32, i128, i16 }
; Function Attrs: nounwind
define dso_local i32 @test(i32 %pid) local_unnamed_addr #0 {
entry:
%ipv6_key = alloca %struct.ipv6_key_t, align 16
call void @llvm.lifetime.start.p0(i64 48, ptr nonnull %ipv6_key) #4
call void @llvm.memset.p0.i64(ptr nonnull align 16 dereferenceable(48) %ipv6_key, i8 0, i64 48, i1 false)
store i32 %pid, ptr %ipv6_key, align 16, !tbaa !2
call void @test1(ptr nonnull %ipv6_key) #4
call void @llvm.lifetime.end.p0(i64 48, ptr nonnull %ipv6_key) #4
ret i32 0
}
; CHECK-LABEL: test
; CHECK: *(u64 *)(r10 - 48) = r{{[0-9]+}}
; CHECK: *(u32 *)(r10 - 48) = r{{[0-9]+}}
; Function Attrs: argmemonly nounwind willreturn
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1
; Function Attrs: argmemonly nounwind willreturn writeonly
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2
declare dso_local void @test1(ptr) local_unnamed_addr #3
; Function Attrs: argmemonly nounwind willreturn
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1
attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { argmemonly nounwind willreturn }
attributes #2 = { argmemonly nounwind willreturn writeonly }
attributes #3 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #4 = { nounwind }
!llvm.module.flags = !{!0}
!llvm.ident = !{!1}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{!"clang version 11.0.0 (https://github.com/llvm/llvm-project.git 55fc7a47f8f18f84b44ff16f4e7a420c0a42ddf1)"}
!2 = !{!3, !4, i64 0}
!3 = !{!"ipv6_key_t", !4, i64 0, !7, i64 16, !8, i64 32}
!4 = !{!"int", !5, i64 0}
!5 = !{!"omnipotent char", !6, i64 0}
!6 = !{!"Simple C/C++ TBAA"}
!7 = !{!"__int128", !5, i64 0}
!8 = !{!"short", !5, i64 0}
|
