Implement type recording for ToBoolean on x64.

src/ia32/lithium-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 1375 matching lines @@
     __ test(reg, Operand(reg));
     EmitBranch(true_block, false_block, not_zero);
   } else if (r.IsDouble()) {
     XMMRegister reg = ToDoubleRegister(instr->InputAt(0));
     __ xorps(xmm0, xmm0);
     __ ucomisd(reg, xmm0);
     EmitBranch(true_block, false_block, not_equal);
   } else {
     ASSERT(r.IsTagged());
     Register reg = ToRegister(instr->InputAt(0));
-    if (instr->hydrogen()->value()->type().IsBoolean()) {
+    HType type = instr->hydrogen()->value()->type();
+    if (type.IsBoolean()) {
       __ cmp(reg, factory()->true_value());
       EmitBranch(true_block, false_block, equal);
+    } else if (type.IsSmi()) {
+      __ test(reg, Operand(reg));
+      EmitBranch(true_block, false_block, not_equal);
     } else {
       Label* true_label = chunk_->GetAssemblyLabel(true_block);
       Label* false_label = chunk_->GetAssemblyLabel(false_block);
 
       ToBooleanStub::Types expected = instr->hydrogen()->expected_input_types();
       // Avoid deopts in the case where we've never executed this path before.
       if (expected.IsEmpty()) expected = ToBooleanStub::all_types();
 
       if (expected.Contains(ToBooleanStub::UNDEFINED)) {
         // undefined -> false.
@@ skipping 2986 matching lines @@
                                          env->deoptimization_index());
   __ InvokeBuiltin(Builtins::IN, CALL_FUNCTION, safepoint_generator);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32