1; RUN: llc -mtriple=bpfel < %s | FileCheck %s 2; RUN: llc -mtriple=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(ptr); 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 call void @llvm.lifetime.start.p0(i64 20, ptr nonnull %id11) #4 36 call void @bar1(ptr noundef nonnull %id11) #4 37 %call = call i32 @memcmp(ptr noundef nonnull dereferenceable(20) %id11, ptr noundef nonnull dereferenceable(20) @id2, i64 noundef 20) #4 38 %cmp = icmp eq i32 %call, 0 39 %conv = zext i1 %cmp to i32 40 call void @llvm.lifetime.end.p0(i64 20, ptr nonnull %id11) #4 41 ret i32 %conv 42} 43 44; CHECK-DAG: *(u32 *)(r1 + 0) 45; CHECK-DAG: *(u32 *)(r1 + 4) 46; CHECK-DAG: *(u32 *)(r10 - 16) 47; CHECK-DAG: *(u32 *)(r10 - 20) 48; CHECK-DAG: *(u32 *)(r10 - 8) 49; CHECK-DAG: *(u32 *)(r10 - 12) 50; CHECK-DAG: *(u32 *)(r1 + 8) 51; CHECK-DAG: *(u32 *)(r1 + 12) 52; CHECK-DAG: *(u32 *)(r2 + 16) 53; CHECK-DAG: *(u32 *)(r10 - 4) 54 55; Function Attrs: argmemonly mustprogress nofree nosync nounwind willreturn 56declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1 57 58declare dso_local void @bar1(ptr noundef) local_unnamed_addr #2 59 60; Function Attrs: argmemonly mustprogress nofree nounwind readonly willreturn 61declare dso_local i32 @memcmp(ptr nocapture noundef, ptr nocapture noundef, i64 noundef) local_unnamed_addr #3 62 63; Function Attrs: argmemonly mustprogress nofree nosync nounwind willreturn 64declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1 65 66attributes #0 = { nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 67attributes #1 = { argmemonly mustprogress nofree nosync nounwind willreturn } 68attributes #2 = { "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 69attributes #3 = { argmemonly mustprogress nofree nounwind readonly willreturn "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 70attributes #4 = { nounwind } 71 72!llvm.module.flags = !{!0, !1} 73!llvm.ident = !{!2} 74 75!0 = !{i32 1, !"wchar_size", i32 4} 76!1 = !{i32 7, !"frame-pointer", i32 2} 77!2 = !{!"clang version 15.0.0 (https://github.com/llvm/llvm-project.git dea65874b2505f8f5e8e51fd8cad6908feb375ec)"} 78