1 files changed, 41 insertions, 1 deletions
diff --git a/utils/TableGen/ClangSACheckersEmitter.cpp b/utils/TableGen/ClangSACheckersEmitter.cpp
index e01d55c527..57850a4387 100644
--- a/utils/TableGen/ClangSACheckersEmitter.cpp
+++ b/utils/TableGen/ClangSACheckersEmitter.cpp
@@ -57,6 +57,40 @@ static std::string getStringValue(const Record &R, StringRef field) {
   return std::string();
 }
 
+// Calculates the integer value representing the BitsInit object
+static inline uint64_t getValueFromBitsInit(const BitsInit *B, const Record &R) {
+  assert(B->getNumBits() <= sizeof(uint64_t) * 8 && "BitInits' too long!");
+
+  uint64_t Value = 0;
+  for (unsigned i = 0, e = B->getNumBits(); i != e; ++i) {
+    const auto *Bit = dyn_cast<BitInit>(B->getBit(i));
+    if (Bit)
+      Value |= uint64_t(Bit->getValue()) << i;
+    else
+      PrintFatalError(R.getLoc(),
+                      "missing Documentation for " + getCheckerFullName(&R));
+  }
+  return Value;
+}
+
+static std::string getCheckerDocs(const Record &R) {
+  StringRef LandingPage;
+  if (BitsInit *BI = R.getValueAsBitsInit("Documentation")) {
+    uint64_t V = getValueFromBitsInit(BI, R);
+    if (V == 1)
+      LandingPage = "available_checks.html";
+    else if (V == 2)
+      LandingPage = "alpha_checks.html";
+  }
+  
+  if (LandingPage.empty())
+    return "";
+
+  return (llvm::Twine("https://clang-analyzer.llvm.org/") + LandingPage + "#" +
+          getCheckerFullName(&R))
+      .str();
+}
+
 namespace clang {
 void EmitClangSACheckers(RecordKeeper &Records, raw_ostream &OS) {
   std::vector<Record*> checkers = Records.getAllDerivedDefinitions("Checker");
@@ -64,6 +98,9 @@ void EmitClangSACheckers(RecordKeeper &Records, raw_ostream &OS) {
 
   using SortedRecords = llvm::StringMap<const Record *>;
 
+  OS << "// This file is automatically generated. Do not edit this file by "
+        "hand.\n";
+
   OS << "\n#ifdef GET_PACKAGES\n";
   {
     SortedRecords sortedPackages;
@@ -89,7 +126,10 @@ void EmitClangSACheckers(RecordKeeper &Records, raw_ostream &OS) {
     OS.write_escaped(getCheckerFullName(&R)) << "\", ";
     OS << R.getName() << ", ";
     OS << "\"";
-    OS.write_escaped(getStringValue(R, "HelpText")) << '\"';
+    OS.write_escaped(getStringValue(R, "HelpText")) << "\", ";
+    OS << "\"";
+    OS.write_escaped(getCheckerDocs(R));
+    OS << "\"";
     OS << ")\n";
   }
   OS << "#endif // GET_CHECKERS\n\n";