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here is the IR code

define dso_local void @func_use_scene_0111() #0 !dbg !7 {
entry:
  %bb = alloca %struct._BTS_Node, align 8
  %s = alloca i32, align 4
  call void @llvm.dbg.declare(metadata %struct._BTS_Node* %bb, metadata !11, metadata !DIExpression()), !dbg !57
  call void @llvm.dbg.declare(metadata i32* %s, metadata !58, metadata !DIExpression()), !dbg !59
  %nodeId = getelementptr inbounds %struct._BTS_Node, %struct._BTS_Node* %bb, i32 0, i32 0, !dbg !60
  %0 = load i32, i32* %nodeId, align 8, !dbg !60
  store i32 %0, i32* %s, align 4, !dbg !59
  ret void, !dbg !61
}

now I get the value assigned to structAlloc :%bb = alloca %struct._BTS_Node, align 8
then ,I call function getStructMataData :

static void getStructMataData(Value *structAlloc){
    for (auto *U : structAlloc->users()){
        outs() << *U << "\n";
    }
}

the results print as follow
%nodeId = getelementptr inbounds %struct._BTS_Node, %struct._BTS_Node* %bb, i32 0, i32 0, !dbg !60

my question is
why the inst:call void @llvm.dbg.declare(metadata %struct._BTS_Node* %bb, metadata !11, metadata !DIExpression()), !dbg !57 can not print?
how to get this call inst?
thankyou for your reply