[bigint,compiler] Pass BigInt binop feedback through to Turbofan.

It's still unused there but now at least it ends up in the
feedback vector.

Bug: v8:6791
Change-Id: I0114d317830b80be4715c74dc5a8950fff4d3485
Reviewed-on: https://chromium-review.googlesource.com/829136Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50194}

src/compiler/js-operator.cc

@@ -622,6 +622,7 @@ struct JSOperatorGlobalCache final {
   Name##Operator<BinaryOperationHint::kNumberOrOddball>                       \
       k##Name##NumberOrOddballOperator;                                       \
   Name##Operator<BinaryOperationHint::kString> k##Name##StringOperator;       \
+  Name##Operator<BinaryOperationHint::kBigInt> k##Name##BigIntOperator;       \
   Name##Operator<BinaryOperationHint::kAny> k##Name##AnyOperator;
   BINARY_OP_LIST(BINARY_OP)
 #undef BINARY_OP
@@ -681,6 +682,8 @@ CACHED_OP_LIST(CACHED_OP)
         return &cache_.k##Name##NumberOrOddballOperator;              \
       case BinaryOperationHint::kString:                              \
         return &cache_.k##Name##StringOperator;                       \
+      case BinaryOperationHint::kBigInt:                              \
+        return &cache_.k##Name##BigIntOperator;                       \
       case BinaryOperationHint::kAny:                                 \
         return &cache_.k##Name##AnyOperator;                          \
     }                                                                 \

src/compiler/js-type-hint-lowering.cc

@@ -38,6 +38,7 @@ bool BinaryOperationHintToNumberOperationHint(
     case BinaryOperationHint::kAny:
     case BinaryOperationHint::kNone:
     case BinaryOperationHint::kString:
+    case BinaryOperationHint::kBigInt:
       break;
   }
   return false;

src/feedback-vector-inl.h

@@ -172,9 +172,7 @@ BinaryOperationHint BinaryOperationHintFromFeedback(int type_feedback) {
     case BinaryOperationFeedback::kString:
       return BinaryOperationHint::kString;
     case BinaryOperationFeedback::kBigInt:
-    // TODO(jarin/jkummerow/neis): Support BigInts in TF.
-    // Fall through for now.
-    case BinaryOperationFeedback::kAny:
+      return BinaryOperationHint::kBigInt;
     default:
       return BinaryOperationHint::kAny;
   }

src/type-hints.cc

@@ -23,6 +23,8 @@ std::ostream& operator<<(std::ostream& os, BinaryOperationHint hint) {
       return os << "NumberOrOddball";
     case BinaryOperationHint::kString:
       return os << "String";
+    case BinaryOperationHint::kBigInt:
+      return os << "BigInt";
     case BinaryOperationHint::kAny:
       return os << "Any";
   }

src/type-hints.h

@@ -20,6 +20,7 @@ enum class BinaryOperationHint : uint8_t {
   kNumber,
   kNumberOrOddball,
   kString,
+  kBigInt,
   kAny
 };