[turbofan] Initial support for Switch.

src/compiler/operator.cc

Index: src/compiler/operator.cc
diff --git a/src/compiler/operator.cc b/src/compiler/operator.cc
index c8687f4304817669cfdefdc2b30a91dc733880b4..e0c7ca369dafa3c0c33c4fc3ac43c0f649b8da66 100644
--- a/src/compiler/operator.cc
+++ b/src/compiler/operator.cc
@@ -10,13 +10,16 @@ namespace v8 {
 namespace internal {
 namespace compiler {
 
+namespace {
 
 template <typename N>
-static inline N CheckRange(size_t val) {
-  CHECK(val <= std::numeric_limits<N>::max());
+V8_INLINE N CheckRange(size_t val) {
+  CHECK_LE(val, std::numeric_limits<N>::max());
   return static_cast<N>(val);
 }
 
+}  // namespace
+
 
 Operator::Operator(Opcode opcode, Properties properties, const char* mnemonic,
                    size_t value_in, size_t effect_in, size_t control_in,