Fix issue 977, occasional failure of the DeltaBlue benchmark.

src/ia32/lithium-ia32.cc

Index: src/ia32/lithium-ia32.cc
diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index d889341b9152ccfabcb10b5ff076431396e0663a..bdcc5310d4580f9cde35be7d5d625489da0fa07b 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -881,19 +881,6 @@ LOperand* LChunkBuilder::FixedTemp(XMMRegister reg) {
 
 
 LInstruction* LChunkBuilder::DoBlockEntry(HBlockEntry* instr) {
-  HBasicBlock* deopt_predecessor = instr->block()->deopt_predecessor();
-  if (deopt_predecessor != NULL &&
-      deopt_predecessor->inverted()) {
-    HEnvironment* env = current_block_->last_environment();
-    HValue* value = env->Pop();
-    ASSERT(value->IsConstant());
-    Handle<Object> obj = HConstant::cast(value)->handle();
-    ASSERT(*obj == *Factory::true_value() || *obj == *Factory::false_value());
-    env->Push(*obj == *Factory::true_value()
-              ? current_block_->graph()->GetConstantFalse()
-              : current_block_->graph()->GetConstantTrue());
-  }
-
   return new LLabel(instr->block());
 }