Improved printing of jump tables.

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 263 matching lines @@
   return !is_aborted();
 }
 
 
 bool LCodeGen::GenerateJumpTable() {
   Label needs_frame_not_call;
   Label needs_frame_is_call;
   for (int i = 0; i < jump_table_.length(); i++) {
     __ bind(&jump_table_[i].label);
     Address entry = jump_table_[i].address;
+    bool is_lazy_deopt = jump_table_[i].is_lazy_deopt;
+    Deoptimizer::BailoutType type =
+        is_lazy_deopt ? Deoptimizer::LAZY : Deoptimizer::EAGER;
+    int id = Deoptimizer::GetDeoptimizationId(entry, type);
+    if (id == Deoptimizer::kNotDeoptimizationEntry) {
+      Comment(";;; jump table entry %d.", i);
+    } else {
+      Comment(";;; jump table entry %d: deoptimization bailout %d.", i, id);
+    }
     if (jump_table_[i].needs_frame) {
       __ movq(kScratchRegister, ExternalReference::ForDeoptEntry(entry));
-      if (jump_table_[i].is_lazy_deopt) {
+      if (is_lazy_deopt) {
         if (needs_frame_is_call.is_bound()) {
           __ jmp(&needs_frame_is_call);
         } else {
           __ bind(&needs_frame_is_call);
           __ push(rbp);
           __ movq(rbp, rsp);
           __ push(rsi);
           // This variant of deopt can only be used with stubs. Since we don't
           // have a function pointer to install in the stack frame that we're
           // building, install a special marker there instead.
@@ skipping 15 matching lines @@
           // have a function pointer to install in the stack frame that we're
           // building, install a special marker there instead.
           ASSERT(info()->IsStub());
           __ Move(rsi, Smi::FromInt(StackFrame::STUB));
           __ push(rsi);
           __ movq(rsi, MemOperand(rsp, kPointerSize));
           __ jmp(kScratchRegister);
         }
       }
     } else {
-      if (jump_table_[i].is_lazy_deopt) {
+      if (is_lazy_deopt) {
         __ Call(entry, RelocInfo::RUNTIME_ENTRY);
       } else {
         __ Jump(entry, RelocInfo::RUNTIME_ENTRY);
       }
     }
   }
   return !is_aborted();
 }
 
 
@@ skipping 5234 matching lines @@
                                FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64