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1; RUN: llc -mtriple=bpf < %s | FileCheck %s2;3; The IR is generated from a bpftrace script (https://github.com/iovisor/bpftrace/issues/1305)4; and then slightly adapted for easy unit testing.5; The llvm bugzilla link: https://bugs.llvm.org/show_bug.cgi?id=475916 7%printf_t = type { i64, i64 }8 9define i64 @"kprobe:blk_update_request"(ptr %0) local_unnamed_addr section "s_kprobe:blk_update_request_1" {10entry:11 %"struct kernfs_node.parent" = alloca i64, align 812 %printf_args = alloca %printf_t, align 813 %"struct cgroup.kn" = alloca i64, align 814 %"struct cgroup_subsys_state.cgroup" = alloca i64, align 815 %"struct blkcg_gq.blkcg" = alloca i64, align 816 %"struct bio.bi_blkg" = alloca i64, align 817 %"struct request.bio" = alloca i64, align 818 %1 = getelementptr i8, ptr %0, i64 11219 %arg0 = load volatile i64, ptr %1, align 820 %2 = add i64 %arg0, 5621 %3 = bitcast ptr %"struct request.bio" to ptr22 call void @llvm.lifetime.start.p0(i64 -1, ptr nonnull %3)23 %probe_read = call i64 inttoptr (i64 4 to ptr)(ptr nonnull %"struct request.bio", i32 8, i64 %2)24 %4 = load i64, ptr %"struct request.bio", align 825 call void @llvm.lifetime.end.p0(i64 -1, ptr nonnull %3)26 %5 = add i64 %4, 7227 %6 = bitcast ptr %"struct bio.bi_blkg" to ptr28 call void @llvm.lifetime.start.p0(i64 -1, ptr nonnull %6)29 %probe_read1 = call i64 inttoptr (i64 5 to ptr)(ptr nonnull %"struct bio.bi_blkg", i32 8, i64 %5)30 %7 = load i64, ptr %"struct bio.bi_blkg", align 831 call void @llvm.lifetime.end.p0(i64 -1, ptr nonnull %6)32 %8 = add i64 %7, 4033 %9 = bitcast ptr %"struct blkcg_gq.blkcg" to ptr34 call void @llvm.lifetime.start.p0(i64 -1, ptr nonnull %9)35 %probe_read2 = call i64 inttoptr (i64 6 to ptr)(ptr nonnull %"struct blkcg_gq.blkcg", i32 8, i64 %8)36 %10 = load i64, ptr %"struct blkcg_gq.blkcg", align 837 call void @llvm.lifetime.end.p0(i64 -1, ptr nonnull %9)38 %11 = bitcast ptr %"struct cgroup_subsys_state.cgroup" to ptr39 call void @llvm.lifetime.start.p0(i64 -1, ptr nonnull %11)40 %probe_read3 = call i64 inttoptr (i64 7 to ptr)(ptr nonnull %"struct cgroup_subsys_state.cgroup", i32 8, i64 %10)41 %12 = load i64, ptr %"struct cgroup_subsys_state.cgroup", align 842 call void @llvm.lifetime.end.p0(i64 -1, ptr nonnull %11)43 %13 = add i64 %12, 28844 %14 = bitcast ptr %"struct cgroup.kn" to ptr45 call void @llvm.lifetime.start.p0(i64 -1, ptr nonnull %14)46 %probe_read4 = call i64 inttoptr (i64 8 to ptr)(ptr nonnull %"struct cgroup.kn", i32 8, i64 %13)47 %15 = load i64, ptr %"struct cgroup.kn", align 848 call void @llvm.lifetime.end.p0(i64 -1, ptr nonnull %14)49 call void @llvm.lifetime.start.p0(i64 -1, ptr nonnull %printf_args)50 %16 = add i64 %15, 851 %17 = bitcast ptr %"struct kernfs_node.parent" to ptr52 store i64 0, ptr %printf_args, align 853 call void @llvm.lifetime.start.p0(i64 -1, ptr nonnull %17)54 55; CHECK: call 856; CHECK-NOT: r{{[0-9]+}} = 057; CHECK: [[REG3:r[0-9]+]] = *(u64 *)(r10 - 24)58; CHECK: [[REG1:r[0-9]+]] = 059; CHECK: *(u64 *)(r10 - 24) = [[REG1]]60 61 %probe_read5 = call i64 inttoptr (i64 9 to ptr)(ptr nonnull %"struct kernfs_node.parent", i32 8, i64 %16)62 %18 = load i64, ptr %"struct kernfs_node.parent", align 863 call void @llvm.lifetime.end.p0(i64 -1, ptr nonnull %17)64 %19 = getelementptr inbounds %printf_t, ptr %printf_args, i64 0, i32 165 store i64 %18, ptr %19, align 866 %get_cpu_id = call i64 inttoptr (i64 18 to ptr)()67 %perf_event_output = call i64 inttoptr (i64 10 to ptr)(ptr %0, i64 2, i64 %get_cpu_id, ptr nonnull %printf_args, i64 16)68 call void @llvm.lifetime.end.p0(i64 -1, ptr nonnull %printf_args)69 ret i64 070}71 72; Function Attrs: argmemonly nounwind willreturn73declare void @llvm.lifetime.start.p0(i64 immarg %0, ptr nocapture %1) #174 75; Function Attrs: argmemonly nounwind willreturn76declare void @llvm.lifetime.end.p0(i64 immarg %0, ptr nocapture %1) #177 78attributes #0 = { nounwind }79attributes #1 = { argmemonly nounwind willreturn }80