[turbofan] Introduce ToBooleanHints on ToBoolean operators.

src/compiler/js-operator.cc

Index: src/compiler/js-operator.cc
diff --git a/src/compiler/js-operator.cc b/src/compiler/js-operator.cc
index fa27ac219fb89f67b6e4bde37b574d177fbf71a9..5f9abceb4045ba408f82c379094654a791252c3d 100644
--- a/src/compiler/js-operator.cc
+++ b/src/compiler/js-operator.cc
@@ -46,6 +46,12 @@ ConvertReceiverMode ConvertReceiverModeOf(Operator const* op) {
 }
 
 
+ToBooleanHints ToBooleanHintsOf(Operator const* op) {
+  DCHECK_EQ(IrOpcode::kJSToBoolean, op->opcode());
+  return OpParameter<ToBooleanHints>(op);
+}
+
+
 size_t hash_value(TailCallMode mode) {
   return base::hash_value(static_cast<unsigned>(mode));
 }
@@ -486,7 +492,6 @@ const CreateLiteralParameters& CreateLiteralParametersOf(const Operator* op) {
   V(NotEqual, Operator::kNoProperties, 2, 1)          \
   V(StrictEqual, Operator::kNoThrow, 2, 1)            \
   V(StrictNotEqual, Operator::kNoThrow, 2, 1)         \
-  V(ToBoolean, Operator::kEliminatable, 1, 1)         \
   V(ToNumber, Operator::kNoProperties, 1, 1)          \
   V(ToString, Operator::kNoProperties, 1, 1)          \
   V(ToName, Operator::kNoProperties, 1, 1)            \
@@ -717,6 +722,16 @@ const Operator* JSOperatorBuilder::Modulus(LanguageMode language_mode,
 }
 
 
+const Operator* JSOperatorBuilder::ToBoolean(ToBooleanHints hints) {
+  // TODO(turbofan): Cache most important versions of this operator.
+  return new (zone()) Operator1<ToBooleanHints>(        //--
+      IrOpcode::kJSToBoolean, Operator::kEliminatable,  // opcode
+      "JSToBoolean",                                    // name
+      1, 1, 0, 1, 1, 0,                                 // inputs/outputs
+      hints);                                           // parameter
+}
+
+
 const Operator* JSOperatorBuilder::CallFunction(
     size_t arity, LanguageMode language_mode, VectorSlotPair const& feedback,
     ConvertReceiverMode convert_mode, TailCallMode tail_call_mode) {