Comment HTML tag name machers: move from StringSwitch to an efficient

TableGen-generated string matcher.

llvm-svn: 162969

4 files changed, 89 insertions, 0 deletions

diff --git a/clang/utils/TableGen/CMakeLists.txt b/clang/utils/TableGen/CMakeLists.txt
index 0d879214d4a..ca2e4696a50 100644
--- a/clang/utils/TableGen/CMakeLists.txt
+++ b/clang/utils/TableGen/CMakeLists.txt
@@ -5,6 +5,7 @@ set(LLVM_LINK_COMPONENTS Support)
 add_tablegen(clang-tblgen CLANG
   ClangASTNodesEmitter.cpp
   ClangAttrEmitter.cpp
+  ClangCommentHTMLTagsEmitter.cpp
   ClangDiagnosticsEmitter.cpp
   ClangSACheckersEmitter.cpp
   NeonEmitter.cpp
diff --git a/clang/utils/TableGen/ClangCommentHTMLTagsEmitter.cpp b/clang/utils/TableGen/ClangCommentHTMLTagsEmitter.cpp
new file mode 100644
index 00000000000..0ae23b293e6
--- /dev/null
+++ b/clang/utils/TableGen/ClangCommentHTMLTagsEmitter.cpp
@@ -0,0 +1,69 @@
+//===--- ClangCommentHTMLTagsEmitter.cpp - Generate HTML tag list for Clang -=//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This tablegen backend emits efficient matchers for HTML tags that are used
+// in documentation comments.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/TableGen/Record.h"
+#include "llvm/TableGen/StringMatcher.h"
+#include <vector>
+
+using namespace llvm;
+
+namespace clang {
+void EmitClangCommentHTMLTags(RecordKeeper &Records, raw_ostream &OS) {
+  std::vector<Record *> Tags = Records.getAllDerivedDefinitions("Tag");
+  std::vector<StringMatcher::StringPair> Matches;
+  for (std::vector<Record *>::iterator I = Tags.begin(), E = Tags.end();
+       I != E; ++I) {
+    Record &Tag = **I;
+    std::string Spelling = Tag.getValueAsString("Spelling");
+    Matches.push_back(StringMatcher::StringPair(Spelling, "return true;"));
+  }
+
+  OS << "// This file is generated by TableGen.  Do not edit.\n\n";
+
+  OS << "bool isHTMLTagName(StringRef Name) {\n";
+  StringMatcher("Name", Matches, OS).Emit();
+  OS << "  return false;\n"
+     << "}\n\n";
+}
+
+void EmitClangCommentHTMLTagsProperties(RecordKeeper &Records,
+                                        raw_ostream &OS) {
+  std::vector<Record *> Tags = Records.getAllDerivedDefinitions("Tag");
+  std::vector<StringMatcher::StringPair> MatchesEndTagOptional;
+  std::vector<StringMatcher::StringPair> MatchesEndTagForbidden;
+  for (std::vector<Record *>::iterator I = Tags.begin(), E = Tags.end();
+       I != E; ++I) {
+    Record &Tag = **I;
+    std::string Spelling = Tag.getValueAsString("Spelling");
+    StringMatcher::StringPair Match(Spelling, "return true;");
+    if (Tag.getValueAsBit("EndTagOptional"))
+      MatchesEndTagOptional.push_back(Match);
+    if (Tag.getValueAsBit("EndTagForbidden"))
+      MatchesEndTagForbidden.push_back(Match);
+  }
+
+  OS << "// This file is generated by TableGen.  Do not edit.\n\n";
+
+  OS << "bool isHTMLEndTagOptional(StringRef Name) {\n";
+  StringMatcher("Name", MatchesEndTagOptional, OS).Emit();
+  OS << "  return false;\n"
+     << "}\n\n";
+
+  OS << "bool isHTMLEndTagForbidden(StringRef Name) {\n";
+  StringMatcher("Name", MatchesEndTagForbidden, OS).Emit();
+  OS << "  return false;\n"
+     << "}\n\n";
+}
+} // end namespace clang
+
diff --git a/clang/utils/TableGen/TableGen.cpp b/clang/utils/TableGen/TableGen.cpp
index d3408ed20f4..bb9b9185050 100644
--- a/clang/utils/TableGen/TableGen.cpp
+++ b/clang/utils/TableGen/TableGen.cpp
@@ -42,6 +42,8 @@ enum ActionType {
   GenClangDeclNodes,
   GenClangStmtNodes,
   GenClangSACheckers,
+  GenClangCommentHTMLTags,
+  GenClangCommentHTMLTagsProperties,
   GenOptParserDefs, GenOptParserImpl,
   GenArmNeon,
   GenArmNeonSema,
@@ -95,6 +97,14 @@ namespace {
                                "Generate Clang AST statement nodes"),
                     clEnumValN(GenClangSACheckers, "gen-clang-sa-checkers",
                                "Generate Clang Static Analyzer checkers"),
+                    clEnumValN(GenClangCommentHTMLTags,
+                               "gen-clang-comment-html-tags",
+                               "Generate efficient matchers for HTML tag "
+                               "names that are used in documentation comments"),
+                    clEnumValN(GenClangCommentHTMLTagsProperties,
+                               "gen-clang-comment-html-tags-properties",
+                               "Generate efficient matchers for HTML tag "
+                               "properties"),
                     clEnumValN(GenArmNeon, "gen-arm-neon",
                                "Generate arm_neon.h for clang"),
                     clEnumValN(GenArmNeonSema, "gen-arm-neon-sema",
@@ -164,6 +174,12 @@ public:
     case GenClangSACheckers:
       EmitClangSACheckers(Records, OS);
       break;
+    case GenClangCommentHTMLTags:
+      EmitClangCommentHTMLTags(Records, OS);
+      break;
+    case GenClangCommentHTMLTagsProperties:
+      EmitClangCommentHTMLTagsProperties(Records, OS);
+      break;
     case GenOptParserDefs:
       EmitOptParser(Records, OS, true);
       break;
diff --git a/clang/utils/TableGen/TableGenBackends.h b/clang/utils/TableGen/TableGenBackends.h
index 779de7c734b..74fc60ec115 100644
--- a/clang/utils/TableGen/TableGenBackends.h
+++ b/clang/utils/TableGen/TableGenBackends.h
@@ -47,6 +47,9 @@ void EmitClangDiagsIndexName(RecordKeeper &Records, raw_ostream &OS);
 
 void EmitClangSACheckers(RecordKeeper &Records, raw_ostream &OS);
 
+void EmitClangCommentHTMLTags(RecordKeeper &Records, raw_ostream &OS);
+void EmitClangCommentHTMLTagsProperties(RecordKeeper &Records, raw_ostream &OS);
+
 void EmitNeon(RecordKeeper &Records, raw_ostream &OS);
 void EmitNeonSema(RecordKeeper &Records, raw_ostream &OS);
 void EmitNeonTest(RecordKeeper &Records, raw_ostream &OS);