| ; RUN: llc -march=bpf < %s | FileCheck %s |
| ; |
| ; The IR is generated from a bpftrace script (https://github.com/iovisor/bpftrace/issues/1305) |
| ; and then slightly adapted for easy unit testing. |
| ; The llvm bugzilla link: https://bugs.llvm.org/show_bug.cgi?id=47591 |
| |
| %printf_t = type { i64, i64 } |
| |
| define i64 @"kprobe:blk_update_request"(i8* %0) local_unnamed_addr section "s_kprobe:blk_update_request_1" { |
| entry: |
| %"struct kernfs_node.parent" = alloca i64, align 8 |
| %printf_args = alloca %printf_t, align 8 |
| %"struct cgroup.kn" = alloca i64, align 8 |
| %"struct cgroup_subsys_state.cgroup" = alloca i64, align 8 |
| %"struct blkcg_gq.blkcg" = alloca i64, align 8 |
| %"struct bio.bi_blkg" = alloca i64, align 8 |
| %"struct request.bio" = alloca i64, align 8 |
| %1 = getelementptr i8, i8* %0, i64 112 |
| %2 = bitcast i8* %1 to i64* |
| %arg0 = load volatile i64, i64* %2, align 8 |
| %3 = add i64 %arg0, 56 |
| %4 = bitcast i64* %"struct request.bio" to i8* |
| call void @llvm.lifetime.start.p0i8(i64 -1, i8* nonnull %4) |
| %probe_read = call i64 inttoptr (i64 4 to i64 (i64*, i32, i64)*)(i64* nonnull %"struct request.bio", i32 8, i64 %3) |
| %5 = load i64, i64* %"struct request.bio", align 8 |
| call void @llvm.lifetime.end.p0i8(i64 -1, i8* nonnull %4) |
| %6 = add i64 %5, 72 |
| %7 = bitcast i64* %"struct bio.bi_blkg" to i8* |
| call void @llvm.lifetime.start.p0i8(i64 -1, i8* nonnull %7) |
| %probe_read1 = call i64 inttoptr (i64 5 to i64 (i64*, i32, i64)*)(i64* nonnull %"struct bio.bi_blkg", i32 8, i64 %6) |
| %8 = load i64, i64* %"struct bio.bi_blkg", align 8 |
| call void @llvm.lifetime.end.p0i8(i64 -1, i8* nonnull %7) |
| %9 = add i64 %8, 40 |
| %10 = bitcast i64* %"struct blkcg_gq.blkcg" to i8* |
| call void @llvm.lifetime.start.p0i8(i64 -1, i8* nonnull %10) |
| %probe_read2 = call i64 inttoptr (i64 6 to i64 (i64*, i32, i64)*)(i64* nonnull %"struct blkcg_gq.blkcg", i32 8, i64 %9) |
| %11 = load i64, i64* %"struct blkcg_gq.blkcg", align 8 |
| call void @llvm.lifetime.end.p0i8(i64 -1, i8* nonnull %10) |
| %12 = bitcast i64* %"struct cgroup_subsys_state.cgroup" to i8* |
| call void @llvm.lifetime.start.p0i8(i64 -1, i8* nonnull %12) |
| %probe_read3 = call i64 inttoptr (i64 7 to i64 (i64*, i32, i64)*)(i64* nonnull %"struct cgroup_subsys_state.cgroup", i32 8, i64 %11) |
| %13 = load i64, i64* %"struct cgroup_subsys_state.cgroup", align 8 |
| call void @llvm.lifetime.end.p0i8(i64 -1, i8* nonnull %12) |
| %14 = add i64 %13, 288 |
| %15 = bitcast i64* %"struct cgroup.kn" to i8* |
| call void @llvm.lifetime.start.p0i8(i64 -1, i8* nonnull %15) |
| %probe_read4 = call i64 inttoptr (i64 8 to i64 (i64*, i32, i64)*)(i64* nonnull %"struct cgroup.kn", i32 8, i64 %14) |
| %16 = load i64, i64* %"struct cgroup.kn", align 8 |
| call void @llvm.lifetime.end.p0i8(i64 -1, i8* nonnull %15) |
| %17 = bitcast %printf_t* %printf_args to i8* |
| call void @llvm.lifetime.start.p0i8(i64 -1, i8* nonnull %17) |
| %18 = add i64 %16, 8 |
| %19 = bitcast i64* %"struct kernfs_node.parent" to i8* |
| %20 = getelementptr inbounds %printf_t, %printf_t* %printf_args, i64 0, i32 0 |
| store i64 0, i64* %20, align 8 |
| call void @llvm.lifetime.start.p0i8(i64 -1, i8* nonnull %19) |
| |
| ; CHECK: call 8 |
| ; CHECK-NOT: r{{[0-9]+}} = 0 |
| ; CHECK: [[REG3:r[0-9]+]] = *(u64 *)(r10 - 24) |
| ; CHECK: [[REG1:r[0-9]+]] = 0 |
| ; CHECK: *(u64 *)(r10 - 24) = [[REG1]] |
| |
| %probe_read5 = call i64 inttoptr (i64 9 to i64 (i64*, i32, i64)*)(i64* nonnull %"struct kernfs_node.parent", i32 8, i64 %18) |
| %21 = load i64, i64* %"struct kernfs_node.parent", align 8 |
| call void @llvm.lifetime.end.p0i8(i64 -1, i8* nonnull %19) |
| %22 = getelementptr inbounds %printf_t, %printf_t* %printf_args, i64 0, i32 1 |
| store i64 %21, i64* %22, align 8 |
| %get_cpu_id = call i64 inttoptr (i64 18 to i64 ()*)() |
| %perf_event_output = call i64 inttoptr (i64 10 to i64 (i8*, i64, i64, %printf_t*, i64)*)(i8* %0, i64 2, i64 %get_cpu_id, %printf_t* nonnull %printf_args, i64 16) |
| call void @llvm.lifetime.end.p0i8(i64 -1, i8* nonnull %17) |
| ret i64 0 |
| } |
| |
| ; Function Attrs: argmemonly nounwind willreturn |
| declare void @llvm.lifetime.start.p0i8(i64 immarg %0, i8* nocapture %1) #1 |
| |
| ; Function Attrs: argmemonly nounwind willreturn |
| declare void @llvm.lifetime.end.p0i8(i64 immarg %0, i8* nocapture %1) #1 |
| |
| attributes #0 = { nounwind } |
| attributes #1 = { argmemonly nounwind willreturn } |