First steps towards better code generation for LBranch:

src/ia32/full-codegen-ia32.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 356 matching lines @@
   MemOperand slot_operand = codegen()->EmitSlotSearch(slot, result_register());
   // Memory operands can be pushed directly.
   __ push(slot_operand);
 }
 
 
 void FullCodeGenerator::TestContext::Plug(Slot* slot) const {
   // For simplicity we always test the accumulator register.
   codegen()->Move(result_register(), slot);
   codegen()->PrepareForBailoutBeforeSplit(TOS_REG, false, NULL, NULL);
-  codegen()->DoTest(true_label_, false_label_, fall_through_);
+  codegen()->DoTest(condition_, true_label_, false_label_, fall_through_);
 }
 
 
 void FullCodeGenerator::EffectContext::Plug(Heap::RootListIndex index) const {
   UNREACHABLE();  // Not used on IA32.
 }
 
 
 void FullCodeGenerator::AccumulatorValueContext::Plug(
     Heap::RootListIndex index) const {
@@ skipping 53 matching lines @@
     }
   } else if (lit->IsSmi()) {
     if (Smi::cast(*lit)->value() == 0) {
       if (false_label_ != fall_through_) __ jmp(false_label_);
     } else {
       if (true_label_ != fall_through_) __ jmp(true_label_);
     }
   } else {
     // For simplicity we always test the accumulator register.
     __ mov(result_register(), lit);
-    codegen()->DoTest(true_label_, false_label_, fall_through_);
+    codegen()->DoTest(condition_, true_label_, false_label_, fall_through_);
   }
 }
 
 
 void FullCodeGenerator::EffectContext::DropAndPlug(int count,
                                                    Register reg) const {
   ASSERT(count > 0);
   __ Drop(count);
 }
 
@@ skipping 15 matching lines @@
 }
 
 
 void FullCodeGenerator::TestContext::DropAndPlug(int count,
                                                  Register reg) const {
   ASSERT(count > 0);
   // For simplicity we always test the accumulator register.
   __ Drop(count);
   __ Move(result_register(), reg);
   codegen()->PrepareForBailoutBeforeSplit(TOS_REG, false, NULL, NULL);
-  codegen()->DoTest(true_label_, false_label_, fall_through_);
+  codegen()->DoTest(condition_, true_label_, false_label_, fall_through_);
 }
 
 
 void FullCodeGenerator::EffectContext::Plug(Label* materialize_true,
                                             Label* materialize_false) const {
   ASSERT(materialize_true == materialize_false);
   __ bind(materialize_true);
 }
 
 
@@ skipping 56 matching lines @@
                                           true_label_,
                                           false_label_);
   if (flag) {
     if (true_label_ != fall_through_) __ jmp(true_label_);
   } else {
     if (false_label_ != fall_through_) __ jmp(false_label_);
   }
 }
 
 
-void FullCodeGenerator::DoTest(Label* if_true,
+void FullCodeGenerator::DoTest(Expression* condition,
+                               Label* if_true,
                                Label* if_false,
                                Label* fall_through) {
   ToBooleanStub stub;
   __ push(result_register());
   __ CallStub(&stub);
   __ test(eax, Operand(eax));
   // The stub returns nonzero for true.
   Split(not_zero, if_true, if_false, fall_through);
 }
 
@@ skipping 3755 matching lines @@
   // And return.
   __ ret(0);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32