1; RUN: llc -march=bpfel < %s | FileCheck %s
2; RUN: llc -march=bpfel -mcpu=v3 < %s | FileCheck %s
3;
4; Source code:
5;   /* set aligned 4 to minimize the number of loads */
6;   struct build_id {
7;     unsigned char id[20];
8;   } __attribute__((aligned(4)));
9;
10;   /* try to compute a local build_id */
11;   void bar1(void *);
12;
13;   /* the global build_id to compare */
14;   struct build_id id2;
15;
16;   int foo()
17;   {
18;     struct build_id id1;
19;
20;     bar1(&id1);
21;     return __builtin_memcmp(&id1, &id2, sizeof(id1)) == 0;
22;   }
23; Compilation flags:
24;   clang -target bpf -S -O2 t.c -emit-llvm
25
26
27%struct.build_id = type { [20 x i8] }
28
29@id2 = dso_local global %struct.build_id zeroinitializer, align 4
30
31; Function Attrs: nounwind
32define dso_local i32 @foo() local_unnamed_addr #0 {
33entry:
34  %id11 = alloca [20 x i8], align 4
35  %id11.sub = getelementptr inbounds [20 x i8], [20 x i8]* %id11, i64 0, i64 0
36  call void @llvm.lifetime.start.p0i8(i64 20, i8* nonnull %id11.sub) #4
37  call void @bar1(i8* noundef nonnull %id11.sub) #4
38  %call = call i32 @memcmp(i8* noundef nonnull dereferenceable(20) %id11.sub, i8* noundef nonnull dereferenceable(20) getelementptr inbounds (%struct.build_id, %struct.build_id* @id2, i64 0, i32 0, i64 0), i64 noundef 20) #4
39  %cmp = icmp eq i32 %call, 0
40  %conv = zext i1 %cmp to i32
41  call void @llvm.lifetime.end.p0i8(i64 20, i8* nonnull %id11.sub) #4
42  ret i32 %conv
43}
44
45; CHECK:   *(u32 *)(r1 + 0)
46; CHECK:   *(u32 *)(r10 - 20)
47; CHECK:   *(u32 *)(r10 - 12)
48; CHECK:   *(u32 *)(r1 + 8)
49
50; Function Attrs: argmemonly mustprogress nofree nosync nounwind willreturn
51declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1
52
53declare dso_local void @bar1(i8* noundef) local_unnamed_addr #2
54
55; Function Attrs: argmemonly mustprogress nofree nounwind readonly willreturn
56declare dso_local i32 @memcmp(i8* nocapture noundef, i8* nocapture noundef, i64 noundef) local_unnamed_addr #3
57
58; Function Attrs: argmemonly mustprogress nofree nosync nounwind willreturn
59declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1
60
61attributes #0 = { nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
62attributes #1 = { argmemonly mustprogress nofree nosync nounwind willreturn }
63attributes #2 = { "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
64attributes #3 = { argmemonly mustprogress nofree nounwind readonly willreturn "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
65attributes #4 = { nounwind }
66
67!llvm.module.flags = !{!0, !1}
68!llvm.ident = !{!2}
69
70!0 = !{i32 1, !"wchar_size", i32 4}
71!1 = !{i32 7, !"frame-pointer", i32 2}
72!2 = !{!"clang version 15.0.0 (https://github.com/llvm/llvm-project.git dea65874b2505f8f5e8e51fd8cad6908feb375ec)"}
73