Revert revisions 7215 and 7212.

src/arm/full-codegen-arm.cc

Index: src/arm/full-codegen-arm.cc
===================================================================
--- src/arm/full-codegen-arm.cc	(revision 7218)
+++ src/arm/full-codegen-arm.cc	(working copy)
@@ -1604,26 +1604,27 @@
       break;
   }
 
-  // For compound assignments we need another deoptimization point after the
-  // variable/property load.
   if (expr->is_compound()) {
     { AccumulatorValueContext context(this);
       switch (assign_type) {
         case VARIABLE:
           EmitVariableLoad(expr->target()->AsVariableProxy()->var());
-          PrepareForBailout(expr->target(), TOS_REG);
           break;
         case NAMED_PROPERTY:
           EmitNamedPropertyLoad(property);
-          PrepareForBailoutForId(expr->CompoundLoadId(), TOS_REG);
           break;
         case KEYED_PROPERTY:
           EmitKeyedPropertyLoad(property);
-          PrepareForBailoutForId(expr->CompoundLoadId(), TOS_REG);
           break;
       }
     }
 
+    // For property compound assignments we need another deoptimization
+    // point after the property load.
+    if (property != NULL) {
+      PrepareForBailoutForId(expr->CompoundLoadId(), TOS_REG);
+    }
+
     Token::Value op = expr->binary_op();
     __ push(r0);  // Left operand goes on the stack.
     VisitForAccumulatorValue(expr->value());
@@ -3804,11 +3805,7 @@
 
   // We need a second deoptimization point after loading the value
   // in case evaluating the property load my have a side effect.
-  if (assign_type == VARIABLE) {
-    PrepareForBailout(expr->expression(), TOS_REG);
-  } else {
-    PrepareForBailout(expr->increment(), TOS_REG);
-  }
+  PrepareForBailout(expr->increment(), TOS_REG);
 
   // Call ToNumber only if operand is not a smi.
   Label no_conversion;