First implementation of allocation elimination in Hydrogen.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 837c9780c50abe3753ddfd8c86d60a45626405f8..2523d9b1b24502a0fe09e01c64103581812e6c8d 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -2916,6 +2916,9 @@ bool HGraph::Optimize(BailoutReason* bailout_reason) {
 
   // Remove dead code and phis
   if (FLAG_dead_code_elimination) Run<HDeadCodeEliminationPhase>();
+
+  if (FLAG_use_escape_analysis) Run<HEscapeAnalysisPhase>();
+
   CollectPhis();
 
   if (has_osr()) osr()->FinishOsrValues();
@@ -2939,8 +2942,6 @@ bool HGraph::Optimize(BailoutReason* bailout_reason) {
 
   if (FLAG_use_canonicalizing) Run<HCanonicalizePhase>();
 
-  if (FLAG_use_escape_analysis) Run<HEscapeAnalysisPhase>();
-
   if (FLAG_use_gvn) Run<HGlobalValueNumberingPhase>();
 
   if (FLAG_use_range) Run<HRangeAnalysisPhase>();