Replaced unary negation by multiplication with -1.

src/ia32/full-codegen-ia32.cc

Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index a5684f6aba45efb5a04f4d1eca736c4a57934120..a3e17a68bdacc00ac8a6832568b51bf6e9bff8dd 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -4347,10 +4347,6 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
       break;
     }
 
-    case Token::SUB:
-      EmitUnaryOperation(expr, "[ UnaryOperation (SUB)");
-      break;
-
     case Token::BIT_NOT:
       EmitUnaryOperation(expr, "[ UnaryOperation (BIT_NOT)");
       break;
@@ -4363,6 +4359,7 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
 
 void FullCodeGenerator::EmitUnaryOperation(UnaryOperation* expr,
                                            const char* comment) {
+  ASSERT_EQ(Token::BIT_NOT, expr->op());
   Comment cmt(masm_, comment);
   UnaryOpStub stub(expr->op());
   // UnaryOpStub expects the argument to be in the