Improve escape analysis

test/mjsunit/mjsunit.status

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 155 matching lines @@
   'result-table-max': [PASS, NO_VARIANTS],
   # TODO(titzer): too slow in --turbo mode due to O(n^2) graph verification.
   'regress/regress-1122': [PASS, NO_VARIANTS],
 
   # TODO(sigurds): Tests that may fail because of missing deopt support.
   'compiler/escape-analysis-1': [PASS, NO_VARIANTS],
   'compiler/escape-analysis-2': [PASS, NO_VARIANTS],
   'compiler/escape-analysis-3': [PASS, NO_VARIANTS],
   'compiler/escape-analysis-4': [PASS, NO_VARIANTS],
   'compiler/escape-analysis-5': [PASS, NO_VARIANTS],
+  'compiler/escape-analysis-6': [PASS, NO_VARIANTS],
   'compiler/escape-analysis-7': [PASS, NO_VARIANTS],
-  # TODO(sigurds): Tests that fail because of incomplete phi handling.
-  'compiler/escape-analysis-6': [PASS, NO_VARIANTS],
+  'compiler/escape-analysis-9': [PASS, NO_VARIANTS],
   # TODO(sigurds): Tests that fail because of incomplete use handling (i.e. select).
   'compiler/escape-analysis-8': [PASS, NO_VARIANTS],
 
   # Assumptions about optimization need investigation in TurboFan.
   'regress-sync-optimized-lists': [PASS, NO_VARIANTS],
 
   # issue 4078:
   'allocation-site-info': [PASS, NO_VARIANTS],
 
   ##############################################################################
@@ skipping 878 matching lines @@
   'regress/regress-crbug-347903': [SKIP],
   'regress/regress-crbug-505007-1': [SKIP],
   'regress/regress-crbug-505007-2': [SKIP],
   'regress/short-circuit': [SKIP],
   'stack-traces-overflow': [SKIP],
   'unicodelctest': [SKIP],
   'unicodelctest-no-optimization': [SKIP],
 }],  # ignition == True and (arch == arm or arch == arm64)
 
 ]