Change InitListExpr dump to label and pointer

[steveire]

Summary

Don't add a child just for the label.

[steveire]

My real preference is just to remove the array filler child node entirely and not add a pointer here. However, I'm just looking for something that has a chance of passing review.

[aaron.ballman]

LGTM aside from a small nit.

lib/AST/ASTDumper.cpp

1956–1959

Indented too far now.

lib/AST/ASTDumper.cpp

void ASTDumper::VisitStringLiteral(const StringLiteral *Str) {
   Str->outputString(OS);
 }
 
 void ASTDumper::VisitInitListExpr(const InitListExpr *ILE) {
   if (auto *Field = ILE->getInitializedFieldInUnion()) {
     OS << " field ";
     NodeDumper.dumpBareDeclRef(Field);
   }
+
   if (auto *Filler = ILE->getArrayFiller()) {
-    dumpChild([=] {
-      OS << "array filler";
+      OS << " array_filler";
+      NodeDumper.dumpPointer(Filler);
+
       dumpStmt(Filler);
-    });
   }
 }
 
 void ASTDumper::VisitUnaryOperator(const UnaryOperator *Node) {
   OS << " " << (Node->isPostfix() ? "postfix" : "prefix")
      << " '" << UnaryOperator::getOpcodeStr(Node->getOpcode()) << "'";
   if (!Node->canOverflow())
     OS << " cannot overflow";

test/AST/ast-dump-stmt.cpp

union U {
   int i;
   long l;
 };
 
 void TestUnionInitList()
 {
   U us[3] = {1};
 // CHECK: VarDecl {{.+}} <col:3, col:15> col:5 us 'U [3]' cinit
-// CHECK-NEXT: `-InitListExpr {{.+}} <col:13, col:15> 'U [3]'
-// CHECK-NEXT:   |-array filler
-// CHECK-NEXT:   | `-InitListExpr {{.+}} <col:15> 'U' field Field {{.+}} 'i' 'int'
+// CHECK-NEXT: `-InitListExpr {{.+}} <col:13, col:15> 'U [3]' array_filler 0x{{.+}}
+// CHECK-NEXT:   |-InitListExpr {{.+}} <col:15> 'U' field Field {{.+}} 'i' 'int'
 // CHECK-NEXT:   `-InitListExpr {{.+}} <col:14> 'U' field Field {{.+}} 'i' 'int'
 // CHECK-NEXT:     `-IntegerLiteral {{.+}} <col:14> 'int' 1
 }
 
 void TestSwitch(int i) {
   switch (int a; i)
     ;
   // CHECK: SwitchStmt 0x{{[^ ]*}} <line:[[@LINE-2]]:3, line:[[@LINE-1]]:5> has_init