[turbofan] Add checked load/store operators.

src/compiler/code-generator.cc

Index: src/compiler/code-generator.cc
diff --git a/src/compiler/code-generator.cc b/src/compiler/code-generator.cc
index 6789f3a9fee75c5c1b6e1b08180e9eb390087f10..d4622c0a351d1962c415bee3d9f92050e1e53d50 100644
--- a/src/compiler/code-generator.cc
+++ b/src/compiler/code-generator.cc
@@ -27,7 +27,8 @@ CodeGenerator::CodeGenerator(Frame* frame, Linkage* linkage,
       deoptimization_states_(code->zone()),
       deoptimization_literals_(code->zone()),
       translations_(code->zone()),
-      last_lazy_deopt_pc_(0) {
+      last_lazy_deopt_pc_(0),
+      ools_(nullptr) {
   for (int i = 0; i < code->InstructionBlockCount(); ++i) {
     new (&labels_[i]) Label;
   }
@@ -71,6 +72,16 @@ Handle<Code> CodeGenerator::GenerateCode() {
     }
   }
 
+  // Assemble all out-of-line code.
+  if (ools_) {
+    masm()->RecordComment("-- Out of line code --");
+    for (OutOfLineCode* ool = ools_; ool; ool = ool->next()) {
+      masm()->bind(ool->entry());
+      ool->Generate();
+      masm()->jmp(ool->exit());
+    }
+  }
+
   FinishCode(masm());
 
   // Ensure there is space for lazy deopt.
@@ -555,6 +566,15 @@ void CodeGenerator::AddNopForSmiCodeInlining() { UNIMPLEMENTED(); }
 
 #endif  // !V8_TURBOFAN_BACKEND
 
+
+OutOfLineCode::OutOfLineCode(CodeGenerator* gen)
+    : masm_(gen->masm()), next_(gen->ools_) {
+  gen->ools_ = this;
+}
+
+
+OutOfLineCode::~OutOfLineCode() {}
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8