First simplistic implementation of escape analysis.

src/hydrogen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
 // met:
 //
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 //       notice, this list of conditions and the following disclaimer.
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 #include "hydrogen.h"
-#include "hydrogen-gvn.h"
 
 #include <algorithm>
 
 #include "v8.h"
 #include "codegen.h"
 #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"
 #include "scopes.h"
 #include "stub-cache.h"
 #include "typing.h"
 
 #if V8_TARGET_ARCH_IA32
 #include "ia32/lithium-codegen-ia32.h"
 #elif V8_TARGET_ARCH_X64
@@ skipping 3974 matching lines @@
 
   InitializeInferredTypes();
 
   // Must be performed before canonicalization to ensure that Canonicalize
   // will not remove semantically meaningful ToInt32 operations e.g. BIT_OR with
   // zero.
   if (FLAG_opt_safe_uint32_operations) ComputeSafeUint32Operations();
 
   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();
 
   // Eliminate redundant stack checks on backwards branches.
   HStackCheckEliminator sce(this);
   sce.Process();
 
   if (FLAG_idefs) SetupInformativeDefinitions();
   if (FLAG_array_bounds_checks_elimination && !FLAG_idefs) {
     EliminateRedundantBoundsChecks();
@@ skipping 7507 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal