Use test(reg, imm) when the operand is a register on ia32

src/ia32/assembler-ia32.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 1209 matching lines @@
 
 void Assembler::test_b(Register reg, const Operand& op) {
   CHECK(reg.is_byte_register());
   EnsureSpace ensure_space(this);
   EMIT(0x84);
   emit_operand(reg, op);
 }
 
 
 void Assembler::test(const Operand& op, const Immediate& imm) {
+  if (op.is_reg_only()) {
+    test(op.reg(), imm);
+    return;
+  }
   EnsureSpace ensure_space(this);
   EMIT(0xF7);
   emit_operand(eax, op);
   emit(imm);
 }
 
 
 void Assembler::test_b(const Operand& op, uint8_t imm8) {
   if (op.is_reg_only() && !op.reg().is_byte_register()) {
     test(op, Immediate(imm8));
@@ skipping 1464 matching lines @@
     fprintf(coverage_log, "%s\n", file_line);
     fflush(coverage_log);
   }
 }
 
 #endif
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32