First simplistic implementation of escape analysis.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index b03bf699389be7864587415c6143280159f27979..0b6052ed6537cd83d0f37b88f3a4a71563582b84 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -26,7 +26,6 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "hydrogen.h"
-#include "hydrogen-gvn.h"
 
 #include <algorithm>
 
@@ -35,6 +34,8 @@
 #include "full-codegen.h"
 #include "hashmap.h"
 #include "hydrogen-environment-liveness.h"
+#include "hydrogen-escape-analysis.h"
+#include "hydrogen-gvn.h"
 #include "lithium-allocator.h"
 #include "parser.h"
 #include "scopeinfo.h"
@@ -4029,11 +4030,16 @@ bool HGraph::Optimize(SmartArrayPointer<char>* bailout_reason) {
 
   if (FLAG_use_canonicalizing) Canonicalize();
 
+  if (FLAG_use_escape_analysis) {
+    HEscapeAnalysis escape_analysis(this);
+    escape_analysis.Analyze();
+  }
+
   if (FLAG_use_gvn) GlobalValueNumbering();
 
   if (FLAG_use_range) {
-    HRangeAnalysis rangeAnalysis(this);
-    rangeAnalysis.Analyze();
+    HRangeAnalysis range_analysis(this);
+    range_analysis.Analyze();
   }
   ComputeMinusZeroChecks();