Improved printing of jump tables.

src/x64/lithium-codegen-x64.cc

Index: src/x64/lithium-codegen-x64.cc
diff --git a/src/x64/lithium-codegen-x64.cc b/src/x64/lithium-codegen-x64.cc
index cf192f4cf9c1b44d7401534c63de4bb23323c768..34248579982d328c48d72855512b85f5f214d601 100644
--- a/src/x64/lithium-codegen-x64.cc
+++ b/src/x64/lithium-codegen-x64.cc
@@ -281,9 +281,18 @@ bool LCodeGen::GenerateJumpTable() {
   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 {
@@ -319,7 +328,7 @@ bool LCodeGen::GenerateJumpTable() {
         }
       }
     } else {
-      if (jump_table_[i].is_lazy_deopt) {
+      if (is_lazy_deopt) {
         __ Call(entry, RelocInfo::RUNTIME_ENTRY);
       } else {
         __ Jump(entry, RelocInfo::RUNTIME_ENTRY);