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 f1eaa22c879d2093d0b67f58204c207a43ee5b02..a967084540287c6c5e8942d4c96bcb6b91403721 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -2961,6 +2961,8 @@ bool HGraph::Optimize(SmartArrayPointer<char>* bailout_reason) {
     return false;
   }
 
+  if (FLAG_use_escape_analysis) Run<HEscapeAnalysisPhase>();

[titzer, 2013/08/06 12:15:47]

I think you might want to run after the first DCE phase, so that objects don't
escape through dead code somehow.

[Michael Starzinger, 2013/08/07 10:51:16]

Done. Moved to after DCE.

+
   // Remove dead code and phis
   if (FLAG_dead_code_elimination) Run<HDeadCodeEliminationPhase>();
   CollectPhis();
@@ -2986,8 +2988,6 @@ bool HGraph::Optimize(SmartArrayPointer<char>* 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>();