Collect type feedback for power-of-2 right operands in BinaryOps.

src/ia32/lithium-codegen-ia32.cc

 // Copyright 2012 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 1251 matching lines @@
     Label done, remainder_eq_dividend, slow, both_positive;
     Register left_reg = ToRegister(instr->left());
     Register right_reg = ToRegister(instr->right());
     Register result_reg = ToRegister(instr->result());
 
     ASSERT(left_reg.is(eax));
     ASSERT(result_reg.is(edx));
     ASSERT(!right_reg.is(eax));
     ASSERT(!right_reg.is(edx));
 
+    Comment(";;; modi has_fixed_right_arg:%d fixed_right_arg_value:%d",

[Jakob Kummerow, 2013/06/03 09:49:30]

This looks like a debugging leftover.

[Sven Panne, 2013/06/03 12:37:02]

Done.

+            instr->hydrogen()->has_fixed_right_arg(),
+            instr->hydrogen()->fixed_right_arg_value());
+
     // Check for x % 0.
     if (instr->hydrogen()->CheckFlag(HValue::kCanBeDivByZero)) {
       __ test(right_reg, Operand(right_reg));
       DeoptimizeIf(zero, instr->environment());
     }
 
     __ test(left_reg, Operand(left_reg));
     __ j(zero, &remainder_eq_dividend, Label::kNear);
     __ j(sign, &slow, Label::kNear);
 
@@ skipping 5281 matching lines @@
                               FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32