1 files changed, 17 insertions, 25 deletions

diff --git a/Source/JavaScriptCore/dfg/DFGVariableEventStream.cpp b/Source/JavaScriptCore/dfg/DFGVariableEventStream.cpp
index e3f413c3b..98e08f6ff 100644
--- a/Source/JavaScriptCore/dfg/DFGVariableEventStream.cpp
+++ b/Source/JavaScriptCore/dfg/DFGVariableEventStream.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012-2015 Apple Inc. All rights reserved.
+ * Copyright (C) 2012, 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -31,7 +31,7 @@
 #include "CodeBlock.h"
 #include "DFGJITCode.h"
 #include "DFGValueSource.h"
-#include "JSCInlines.h"
+#include "Operations.h"
 #include <wtf/DataLog.h>
 #include <wtf/HashMap.h>
 
@@ -48,14 +48,11 @@ namespace {
 
 struct MinifiedGenerationInfo {
     bool filled; // true -> in gpr/fpr/pair, false -> spilled
-    bool alive;
     VariableRepresentation u;
     DataFormat format;
     
     MinifiedGenerationInfo()
-        : filled(false)
-        , alive(false)
-        , format(DataFormatNone)
+        : format(DataFormatNone)
     {
     }
     
@@ -65,19 +62,13 @@ struct MinifiedGenerationInfo {
         case BirthToFill:
         case Fill:
             filled = true;
-            alive = true;
             break;
         case BirthToSpill:
         case Spill:
             filled = false;
-            alive = true;
             break;
-        case Birth:
-            alive = true;
-            return;
         case Death:
             format = DataFormatNone;
-            alive = false;
             return;
         default:
             return;
@@ -90,23 +81,25 @@ struct MinifiedGenerationInfo {
 
 } // namespace
 
-bool VariableEventStream::tryToSetConstantRecovery(ValueRecovery& recovery, MinifiedNode* node) const
+bool VariableEventStream::tryToSetConstantRecovery(ValueRecovery& recovery, CodeBlock* codeBlock, MinifiedNode* node) const
 {
     if (!node)
         return false;
     
-    if (node->hasConstant()) {
-        recovery = ValueRecovery::constant(node->constant());
+    if (node->hasConstantNumber()) {
+        recovery = ValueRecovery::constant(
+            codeBlock->constantRegister(
+                FirstConstantRegisterIndex + node->constantNumber()).get());
         return true;
     }
     
-    if (node->op() == PhantomDirectArguments) {
-        recovery = ValueRecovery::directArgumentsThatWereNotCreated(node->id());
+    if (node->hasWeakConstant()) {
+        recovery = ValueRecovery::constant(node->weakConstant());
         return true;
     }
     
-    if (node->op() == PhantomClonedArguments) {
-        recovery = ValueRecovery::outOfBandArgumentsThatWereNotCreated(node->id());
+    if (node->op() == PhantomArguments) {
+        recovery = ValueRecovery::argumentsThatWereNotCreated();
         return true;
     }
     
@@ -155,8 +148,7 @@ void VariableEventStream::reconstruct(
             // nothing to do.
             break;
         case BirthToFill:
-        case BirthToSpill:
-        case Birth: {
+        case BirthToSpill: {
             MinifiedGenerationInfo info;
             info.update(event);
             generationInfos.add(event.id(), info);
@@ -195,14 +187,14 @@ void VariableEventStream::reconstruct(
         
         ASSERT(source.kind() == HaveNode);
         MinifiedNode* node = graph.at(source.id());
+        if (tryToSetConstantRecovery(valueRecoveries[i], codeBlock, node))
+            continue;
+        
         MinifiedGenerationInfo info = generationInfos.get(source.id());
-        if (!info.alive) {
+        if (info.format == DataFormatNone) {
             valueRecoveries[i] = ValueRecovery::constant(jsUndefined());
             continue;
         }
-
-        if (tryToSetConstantRecovery(valueRecoveries[i], node))
-            continue;
         
         ASSERT(info.format != DataFormatNone);