[clang] Add missing field to TLSModelAttr json AST dump

[aaron.ballman]

LGTM!

clang/include/clang/AST/JSONNodeDumper.h

public:
   void Visit(const APValue &Value, QualType Ty);
 
   void VisitAliasAttr(const AliasAttr *AA);
   void VisitCleanupAttr(const CleanupAttr *CA);
   void VisitDeprecatedAttr(const DeprecatedAttr *DA);
   void VisitUnavailableAttr(const UnavailableAttr *UA);
   void VisitSectionAttr(const SectionAttr *SA);
   void VisitVisibilityAttr(const VisibilityAttr *VA);
+  void VisitTLSModelAttr(const TLSModelAttr *TA);
 
   void VisitTypedefType(const TypedefType *TT);
   void VisitUsingType(const UsingType *TT);
   void VisitFunctionType(const FunctionType *T);
   void VisitFunctionProtoType(const FunctionProtoType *T);
   void VisitRValueReferenceType(const ReferenceType *RT);
   void VisitArrayType(const ArrayType *AT);
   void VisitConstantArrayType(const ConstantArrayType *CAT);

clang/lib/AST/JSONNodeDumper.cpp

void JSONNodeDumper::VisitSectionAttr(const SectionAttr *SA) {
   JOS.attribute("section_name", SA->getName());
 }
 
 void JSONNodeDumper::VisitVisibilityAttr(const VisibilityAttr *VA) {
   JOS.attribute("visibility", VisibilityAttr::ConvertVisibilityTypeToStr(
                                   VA->getVisibility()));
 }
 
+void JSONNodeDumper::VisitTLSModelAttr(const TLSModelAttr *TA) {
+  JOS.attribute("tls_model", TA->getModel());
+}
+
 void JSONNodeDumper::VisitTypedefType(const TypedefType *TT) {
   JOS.attribute("decl", createBareDeclRef(TT->getDecl()));
   if (!TT->typeMatchesDecl())
     JOS.attribute("type", createQualType(TT->desugar()));
 }
 
 void JSONNodeDumper::VisitUsingType(const UsingType *TT) {
   JOS.attribute("decl", createBareDeclRef(TT->getFoundDecl()));

clang/test/AST/ast-dump-attr-json.cpp

 
 __attribute__((unavailable)) int unavailable_var0;
 __attribute__((unavailable("reason"))) int unavailable_var1;
 
 __attribute__ ((section ("SECTION_NAME"))) int section_var;
 
 __attribute__ ((visibility ("hidden"))) int visibility_var;
 
+__thread __attribute__ ((tls_model ("local-exec"))) int tls_model_var;
 
 // NOTE: CHECK lines have been autogenerated by gen_ast_dump_json_test.py
 // using --filters=VarDecl
 
 
 // CHECK-NOT: {{^}}Dumping
 // CHECK:  "kind": "VarDecl",
 // CHECK-NEXT:  "loc": {

 // CHECK-NEXT:      "col": 37,
 // CHECK-NEXT:      "tokLen": 1
 // CHECK-NEXT:     }
 // CHECK-NEXT:    },
 // CHECK-NEXT:    "visibility": "hidden"
 // CHECK-NEXT:   }
 // CHECK-NEXT:  ]
 // CHECK-NEXT: }
+
+
+// CHECK-NOT: {{^}}Dumping
+// CHECK:  "kind": "VarDecl",
+// CHECK-NEXT:  "loc": {
+// CHECK-NEXT:   "offset": 724,
+// CHECK-NEXT:   "line": 22,
+// CHECK-NEXT:   "col": 57,
+// CHECK-NEXT:   "tokLen": 13
+// CHECK-NEXT:  },
+// CHECK-NEXT:  "range": {
+// CHECK-NEXT:   "begin": {
+// CHECK-NEXT:    "offset": 668,
+// CHECK-NEXT:    "col": 1,
+// CHECK-NEXT:    "tokLen": 8
+// CHECK-NEXT:   },
+// CHECK-NEXT:   "end": {
+// CHECK-NEXT:    "offset": 724,
+// CHECK-NEXT:    "col": 57,
+// CHECK-NEXT:    "tokLen": 13
+// CHECK-NEXT:   }
+// CHECK-NEXT:  },
+// CHECK-NEXT:  "name": "tls_model_var",
+// CHECK-NEXT:  "mangledName": "tls_model_var",
+// CHECK-NEXT:  "type": {
+// CHECK-NEXT:   "qualType": "int"
+// CHECK-NEXT:  },
+// CHECK-NEXT:  "tls": "static",
+// CHECK-NEXT:  "inner": [
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "TLSModelAttr",
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {
+// CHECK-NEXT:      "offset": 693,
+// CHECK-NEXT:      "col": 26,
+// CHECK-NEXT:      "tokLen": 9
+// CHECK-NEXT:     },
+// CHECK-NEXT:     "end": {
+// CHECK-NEXT:      "offset": 716,
+// CHECK-NEXT:      "col": 49,
+// CHECK-NEXT:      "tokLen": 1
+// CHECK-NEXT:     }
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "tls_model": "local-exec"
+// CHECK-NEXT:   }
+// CHECK-NEXT:  ]
+// CHECK-NEXT: }