Fix crash bug when loading const variable in the presence of eval....

src/codegen-ia32.cc

Index: src/codegen-ia32.cc
===================================================================
--- src/codegen-ia32.cc	(revision 1710)
+++ src/codegen-ia32.cc	(working copy)
@@ -3286,6 +3286,11 @@
                ContextSlotOperandCheckExtensions(potential_slot,
                                                  value,
                                                  &slow));
+        if (potential_slot->var()->mode() == Variable::CONST) {
+          __ cmp(value.reg(), Factory::the_hole_value());
+          done.Branch(not_equal, &value);
+          __ mov(value.reg(), Factory::undefined_value());
+        }
         // There is always control flow to slow from

[Kevin Millikin (Chromium), 2009/04/15 10:42:54]

This comment isn't explicit enough.  Could you add "so we have to jump around
it." here and in the ARM version?

         // ContextSlotOperandCheckExtensions.
         done.Jump(&value);