Use direct jump and call instruction for X64 when the deoptimization entries are in the code range

src/x64/lithium-codegen-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 599 matching lines @@
   RegisterEnvironmentForDeoptimization(environment, Safepoint::kNoLazyDeopt);
   ASSERT(environment->HasBeenRegistered());
   int id = environment->deoptimization_index();
   Address entry = Deoptimizer::GetDeoptimizationEntry(id, Deoptimizer::EAGER);
   if (entry == NULL) {
     Abort("bailout was not prepared");
     return;
   }
 
   if (cc == no_condition) {
-    __ Jump(entry, RelocInfo::RUNTIME_ENTRY);
+    if (FLAG_disable_direct_deopt) {
+      __ Jump(entry, RelocInfo::RUNTIME_ENTRY);
+    } else {
+      __ jmp(entry, RelocInfo::DEOPT_ENTRY);
+    }
   } else {
-    // We often have several deopts to the same entry, reuse the last
-    // jump entry if this is the case.
-    if (jump_table_.is_empty() ||
-        jump_table_.last().address != entry) {
-      jump_table_.Add(JumpTableEntry(entry), zone());
+    if (FLAG_disable_direct_deopt) {
+      // We often have several deopts to the same entry, reuse the last
+      // jump entry if this is the case.
+      if (jump_table_.is_empty() ||
+          jump_table_.last().address != entry) {
+        jump_table_.Add(JumpTableEntry(entry), zone());
+      }
+      __ j(cc, &jump_table_.last().label);
+    } else {
+      __ j(cc, entry, RelocInfo::DEOPT_ENTRY);
     }
-    __ j(cc, &jump_table_.last().label);
   }
 }
 
 
 void LCodeGen::PopulateDeoptimizationData(Handle<Code> code) {
   int length = deoptimizations_.length();
   if (length == 0) return;
   Handle<DeoptimizationInputData> data =
       factory()->NewDeoptimizationInputData(length, TENURED);
 
@@ skipping 4785 matching lines @@
                                FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64