AsmWriter/Bitcode: MDNamespace

llvm-svn: 229018

include/llvm/Bitcode/LLVMBitCodes.h

@@ -158,7 +158,8 @@ namespace bitc {
     METADATA_COMPILE_UNIT  = 20,  // [distinct, ...]
     METADATA_SUBPROGRAM    = 21,  // [distinct, ...]
     METADATA_LEXICAL_BLOCK = 22,  // [distinct, scope, file, line, column]
-    METADATA_LEXICAL_BLOCK_FILE=23// [distinct, scope, file, discriminator]
+    METADATA_LEXICAL_BLOCK_FILE=23,//[distinct, scope, file, discriminator]
+    METADATA_NAMESPACE     = 24   // [distinct, scope, file, name, line]
   };
 
   // The constants block (CONSTANTS_BLOCK_ID) describes emission for each

include/llvm/IR/DebugInfoMetadata.h

@@ -1104,6 +1104,8 @@ public:
   Metadata *getScope() const { return getOperand(1); }
   StringRef getName() const { return getStringOperand(2); }
 
+  MDString *getRawName() const { return getOperandAs<MDString>(2); }
+
   static bool classof(const Metadata *MD) {
     return MD->getMetadataID() == MDNamespaceKind;
   }

lib/AsmParser/LLParser.cpp

@@ -3497,9 +3497,22 @@ bool LLParser::ParseMDLexicalBlockFile(MDNode *&Result, bool IsDistinct) {
   return false;
 }
 
+/// ParseMDNamespace:
+///   ::= !MDNamespace(scope: !0, file: !2, name: "SomeNamespace", line: 9)
 bool LLParser::ParseMDNamespace(MDNode *&Result, bool IsDistinct) {
-  return TokError("unimplemented parser");
+#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
+  REQUIRED(scope, MDField, );                                                  \
+  OPTIONAL(file, MDField, );                                                   \
+  OPTIONAL(name, MDStringField, );                                             \
+  OPTIONAL(line, LineField, );
+  PARSE_MD_FIELDS();
+#undef VISIT_MD_FIELDS
+
+  Result = GET_OR_DISTINCT(MDNamespace,
+                           (Context, scope.Val, file.Val, name.Val, line.Val));
+  return false;
 }
+
 bool LLParser::ParseMDTemplateTypeParameter(MDNode *&Result, bool IsDistinct) {
   return TokError("unimplemented parser");
 }

lib/Bitcode/Reader/BitcodeReader.cpp

@@ -1490,6 +1490,18 @@ std::error_code BitcodeReader::ParseMetadata() {
           NextMDValueNo++);
       break;
     }
+    case bitc::METADATA_NAMESPACE: {
+      if (Record.size() != 5)
+        return Error("Invalid record");
+
+      MDValueList.AssignValue(
+          GET_OR_DISTINCT(MDNamespace, Record[0],
+                          (Context, getMDOrNull(Record[1]),
+                           getMDOrNull(Record[2]), getMDString(Record[3]),
+                           Record[4])),
+          NextMDValueNo++);
+      break;
+    }
     case bitc::METADATA_STRING: {
       std::string String(Record.begin(), Record.end());
       llvm::UpgradeMDStringConstant(String);

lib/Bitcode/Writer/BitcodeWriter.cpp

@@ -1007,11 +1007,20 @@ static void WriteMDLexicalBlockFile(const MDLexicalBlockFile *N,
   Record.clear();
 }
 
-static void WriteMDNamespace(const MDNamespace *, const ValueEnumerator &,
+static void WriteMDNamespace(const MDNamespace *N, const ValueEnumerator &VE,
-                             BitstreamWriter &, SmallVectorImpl<uint64_t> &,
+                             BitstreamWriter &Stream,
-                             unsigned) {
+                             SmallVectorImpl<uint64_t> &Record,
-  llvm_unreachable("write not implemented");
+                             unsigned Abbrev) {
+  Record.push_back(N->isDistinct());
+  Record.push_back(VE.getMetadataOrNullID(N->getScope()));
+  Record.push_back(VE.getMetadataOrNullID(N->getFile()));
+  Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
+  Record.push_back(N->getLine());
+
+  Stream.EmitRecord(bitc::METADATA_NAMESPACE, Record, Abbrev);
+  Record.clear();
 }
+
 static void WriteMDTemplateTypeParameter(const MDTemplateTypeParameter *,
                                          const ValueEnumerator &,
                                          BitstreamWriter &,

lib/IR/AsmWriter.cpp

@@ -1660,10 +1660,24 @@ static void writeMDLexicalBlockFile(raw_ostream &Out,
   Out << ")";
 }
 
-static void writeMDNamespace(raw_ostream &, const MDNamespace *, TypePrinting *,
+static void writeMDNamespace(raw_ostream &Out, const MDNamespace *N,
-                             SlotTracker *, const Module *) {
+                             TypePrinting *TypePrinter, SlotTracker *Machine,
-  llvm_unreachable("write not implemented");
+                             const Module *Context) {
+  Out << "!MDNamespace(";
+  FieldSeparator FS;
+  Out << FS << "scope: ";
+  writeMetadataAsOperand(Out, N->getScope(), TypePrinter, Machine, Context);
+  if (N->getFile()) {
+    Out << FS << "file: ";
+    writeMetadataAsOperand(Out, N->getFile(), TypePrinter, Machine, Context);
+  }
+  if (!N->getName().empty())
+    Out << FS << "name: \"" << N->getName() << "\"";
+  if (N->getLine())
+    Out << FS << "line: " << N->getLine();
+  Out << ")";
 }
+
 static void writeMDTemplateTypeParameter(raw_ostream &,
                                          const MDTemplateTypeParameter *,
                                          TypePrinting *, SlotTracker *,

test/Assembler/invalid-mdnamespace-missing-namespace.ll

@@ -0,0 +1,4 @@
+; RUN: not llvm-as < %s -disable-output 2>&1 | FileCheck %s
+
+; CHECK: [[@LINE+1]]:36: error: missing required field 'scope'
+!0 = !MDNamespace(name: "Namespace")

test/Assembler/mdnamespace.ll

@@ -0,0 +1,16 @@
+; RUN: llvm-as < %s | llvm-dis | llvm-as | llvm-dis | FileCheck %s
+; RUN: verify-uselistorder %s
+
+; CHECK: !named = !{!0, !1, !2, !3, !4, !4}
+!named = !{!0, !1, !2, !3, !4, !5}
+
+!0 = distinct !{}
+!1 = !{!"path/to/file", !"/path/to/dir"}
+!2 = !MDFile(filename: "path/to/file", directory: "/path/to/dir")
+
+; CHECK: !3 = !MDNamespace(scope: !0, file: !2, name: "Namespace", line: 7)
+!3 = !MDNamespace(scope: !0, file: !2, name: "Namespace", line: 7)
+
+; CHECK: !4 = !MDNamespace(scope: !0)
+!4 = !MDNamespace(scope: !0, file: null, name: "", line: 0)
+!5 = !MDNamespace(scope: !0)