[turbofan] Optimize certain chains of Branch into a Switch.

src/compiler/operator.cc

Index: src/compiler/operator.cc
diff --git a/src/compiler/operator.cc b/src/compiler/operator.cc
index e0c7ca369dafa3c0c33c4fc3ac43c0f649b8da66..ae10348422cf3eeb71525c0e637225864e9fa52e 100644
--- a/src/compiler/operator.cc
+++ b/src/compiler/operator.cc
@@ -21,6 +21,10 @@ V8_INLINE N CheckRange(size_t val) {
 }  // namespace
 
 
+// static
+STATIC_CONST_MEMBER_DEFINITION const size_t Operator::kMaxControlOutputCount;
+
+
 Operator::Operator(Opcode opcode, Properties properties, const char* mnemonic,
                    size_t value_in, size_t effect_in, size_t control_in,
                    size_t value_out, size_t effect_out, size_t control_out)
@@ -32,7 +36,7 @@ Operator::Operator(Opcode opcode, Properties properties, const char* mnemonic,
       control_in_(CheckRange<uint16_t>(control_in)),
       value_out_(CheckRange<uint16_t>(value_out)),
       effect_out_(CheckRange<uint8_t>(effect_out)),
-      control_out_(CheckRange<uint8_t>(control_out)) {}
+      control_out_(CheckRange<uint16_t>(control_out)) {}
 
 
 std::ostream& operator<<(std::ostream& os, const Operator& op) {