DFG arguments simplification should have rationalized handling of TearOffArguments
https://bugs.webkit.org/show_bug.cgi?id=88206

Reviewed by Geoffrey Garen.
        
- Accesses to the unmodified arguments register ought to have the same effect on
  alias/escape analysis of arguments as accesses to the mutable arguments register.
        
- The existence of TearOffArguments should not get in the way of arguments aliasing.
        
- TearOffArguments should be eliminated if CreateArguments is eliminated.

* dfg/DFGArgumentsSimplificationPhase.cpp:
(JSC::DFG::ArgumentsSimplificationPhase::run):
(JSC::DFG::ArgumentsSimplificationPhase::observeBadArgumentsUse):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@119444 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/Source/JavaScriptCore/ChangeLog b/Source/JavaScriptCore/ChangeLog
index 9133e5a..a38308f 100644
--- a/Source/JavaScriptCore/ChangeLog
+++ b/Source/JavaScriptCore/ChangeLog
@@ -1,3 +1,21 @@
+2012-06-04  Filip Pizlo  <fpizlo@apple.com>
+
+        DFG arguments simplification should have rationalized handling of TearOffArguments
+        https://bugs.webkit.org/show_bug.cgi?id=88206
+
+        Reviewed by Geoffrey Garen.
+        
+        - Accesses to the unmodified arguments register ought to have the same effect on
+          alias/escape analysis of arguments as accesses to the mutable arguments register.
+        
+        - The existence of TearOffArguments should not get in the way of arguments aliasing.
+        
+        - TearOffArguments should be eliminated if CreateArguments is eliminated.
+
+        * dfg/DFGArgumentsSimplificationPhase.cpp:
+        (JSC::DFG::ArgumentsSimplificationPhase::run):
+        (JSC::DFG::ArgumentsSimplificationPhase::observeBadArgumentsUse):
+
 2012-06-04  Gavin Barraclough  <barraclough@apple.com>
 
         Remove enabledProfilerReference