Merge bleeding edge r6035 to 2.4 branch. Fix push of random value in...

src/full-codegen.cc

Index: src/full-codegen.cc
===================================================================
--- src/full-codegen.cc	(revision 6071)
+++ src/full-codegen.cc	(working copy)
@@ -799,6 +799,11 @@
   SetStatementPosition(stmt);
   NestedStatement* current = nesting_stack_;
   int stack_depth = 0;
+  // When continuing, we clobber the unpredictable value in the accumulator
+  // with one that's safe for GC.  If we hit an exit from the try block of
+  // try...finally on our way out, we will unconditionally preserve the
+  // accumulator on the stack.
+  ClearAccumulator();
   while (!current->IsContinueTarget(stmt->target())) {
     stack_depth = current->Exit(stack_depth);
     current = current->outer();
@@ -815,6 +820,11 @@
   SetStatementPosition(stmt);
   NestedStatement* current = nesting_stack_;
   int stack_depth = 0;
+  // When breaking, we clobber the unpredictable value in the accumulator
+  // with one that's safe for GC.  If we hit an exit from the try block of
+  // try...finally on our way out, we will unconditionally preserve the
+  // accumulator on the stack.
+  ClearAccumulator();
   while (!current->IsBreakTarget(stmt->target())) {
     stack_depth = current->Exit(stack_depth);
     current = current->outer();
@@ -1104,7 +1114,10 @@
     Visit(stmt->try_block());
     __ PopTryHandler();
   }
-  // Execute the finally block on the way out.
+  // Execute the finally block on the way out.  Clobber the unpredictable
+  // value in the accumulator with one that's safe for GC.  The finally
+  // block will unconditionally preserve the accumulator on the stack.
+  ClearAccumulator();
   __ Call(&finally_entry);
 }