Add miscellaneous todo comments.

Author: dan-zheng

include/swift/AST/AutoDiff.h

@@ -484,7 +484,7 @@ class AutoDiffDerivativeFunctionIdentifier : public llvm::FoldingSetNode {
 /// The key type used for uniquing `SILDifferentiabilityWitness` in
 /// `SILModule`: original function name, parameter indices, result indices, and
 /// derivative generic signature.
-// TODO: Unify with `AutoDiffDerivativeFunctionIdentifier`.
+// TODO(TF-893): Unify with `AutoDiffDerivativeFunctionIdentifier`.
 using SILDifferentiabilityWitnessKey =
 std::tuple<StringRef, AutoDiffIndexSubset *,
            AutoDiffIndexSubset *, GenericSignature *>;

lib/AST/ASTMangler.cpp

@@ -429,7 +429,6 @@ std::string ASTMangler::mangleAutoDiffLinearMapHelper(
 std::string ASTMangler::mangleSILDifferentiabilityWitnessKey(
     SILDifferentiabilityWitnessKey key) {
   // TODO(TF-20): Make the mangling scheme robust.
-  // TODO(TF-680): Mangle derivative generic signature as well.
   beginManglingWithoutPrefix();
 
   auto originalName = std::get<0>(key);

lib/ParseSIL/ParseSIL.cpp

@@ -6746,7 +6746,7 @@ bool SILParserTUState::parseSILDefaultWitnessTable(Parser &P) {
 }
 
 // SWIFT_ENABLE_TENSORFLOW
-// TODO: Dedupe with `SILParser::convertRequirements` upstream.
+// TODO(TF-893): Dedupe with `SILParser::convertRequirements` upstream.
 // Consider defining this as `Parser::convertRequirements`.
 static void convertRequirements(Parser &P, SILFunction *F,
                                 ArrayRef<RequirementRepr> From,
@@ -6956,7 +6956,7 @@ bool SILParserTUState::parseSILDifferentiabilityWitness(Parser &P) {
       return true;
   }
 
-  // TODO: Parse `isSerialized` flag.
+  // TODO(TF-893): Parse `isSerialized` flag.
   bool isSerialized = false;
   SILDifferentiabilityWitness::create(
       M, *linkage, originalFn, parameterIndices, resultIndices,

lib/SIL/SILPrinter.cpp

@@ -2712,7 +2712,7 @@ static void printSILDifferentiabilityWitnesses(
   std::sort(sortedDiffWitnesses.begin(), sortedDiffWitnesses.end(),
     [] (const SILDifferentiabilityWitness *w1,
         const SILDifferentiabilityWitness *w2) -> bool {
-      // TODO: Sort based on more criteria for deterministic ordering.
+      // TODO(TF-893): Sort based on more criteria for deterministic ordering.
       return w1->getOriginalFunction()->getName()
           .compare(w2->getOriginalFunction()->getName());
     }

lib/SIL/SILVerifier.cpp

@@ -5359,8 +5359,8 @@ void SILDifferentiabilityWitness::verify(const SILModule &M) const {
 #endif
   auto origFnType = originalFunction->getLoweredFunctionType();
   if (jvp) {
-    // TODO: Change `SILFunctionType::getAutoDiffDerivativeFunctionType` to
-    // accept result indices.
+    // TODO(TF-893): Change `SILFunctionType::getAutoDiffDerivativeFunctionType`
+    // to accept result indices.
     auto expectedJVPType = origFnType->getAutoDiffDerivativeFunctionType(
         getParameterIndices(), /*resultIndex*/ *resultIndices->begin(),
         AutoDiffDerivativeFunctionKind::JVP, M.Types,
@@ -5372,8 +5372,8 @@ void SILDifferentiabilityWitness::verify(const SILModule &M) const {
         "JVP type does not match expected JVP type");
   }
   if (vjp) {
-    // TODO: Change `SILFunctionType::getAutoDiffDerivativeFunctionType` to
-    // accept result indices.
+    // TODO(TF-893): Change `SILFunctionType::getAutoDiffDerivativeFunctionType`
+    // to result indices.
     auto expectedVJPType = origFnType->getAutoDiffDerivativeFunctionType(
         getParameterIndices(), /*resultIndex*/ *resultIndices->begin(),
         AutoDiffDerivativeFunctionKind::VJP, M.Types,