Allow comparison in UINT32 mode.

src/ia32/lithium-codegen-ia32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "v8.h"
 
 #if V8_TARGET_ARCH_IA32
 
 #include "ia32/lithium-codegen-ia32.h"
 #include "ic.h"
@@ skipping 1627 matching lines @@
         } else {
           __ ror(ToRegister(left), shift_count);
         }
         break;
       case Token::SAR:
         if (shift_count != 0) {
           __ sar(ToRegister(left), shift_count);
         }
         break;
       case Token::SHR:
-        if (shift_count == 0 && instr->can_deopt()) {
+        if (shift_count != 0) {
+          __ shr(ToRegister(left), shift_count);
+        } else if (instr->can_deopt()) {
           __ test(ToRegister(left), ToRegister(left));
           DeoptimizeIf(sign, instr->environment());
-        } else {
-          __ shr(ToRegister(left), shift_count);
         }
         break;
       case Token::SHL:
         if (shift_count != 0) {
           if (instr->hydrogen_value()->representation().IsSmi() &&
               instr->can_deopt()) {
             if (shift_count != 1) {
               __ shl(ToRegister(left), shift_count - 1);
             }
             __ SmiTag(ToRegister(left));
@@ skipping 573 matching lines @@
     default:
       UNREACHABLE();
   }
   return cond;
 }
 
 
 void LCodeGen::DoCompareNumericAndBranch(LCompareNumericAndBranch* instr) {
   LOperand* left = instr->left();
   LOperand* right = instr->right();
-  Condition cc = TokenToCondition(instr->op(), instr->is_double());
+  bool is_unsigned =
+      instr->is_double() || instr->hydrogen()->CheckFlag(HInstruction::kUint32);
+  Condition cc = TokenToCondition(instr->op(), is_unsigned);
 
   if (left->IsConstantOperand() && right->IsConstantOperand()) {
     // We can statically evaluate the comparison.
     double left_val = ToDouble(LConstantOperand::cast(left));
     double right_val = ToDouble(LConstantOperand::cast(right));
     int next_block = EvalComparison(instr->op(), left_val, right_val) ?
         instr->TrueDestination(chunk_) : instr->FalseDestination(chunk_);
     EmitGoto(next_block);
   } else {
     if (instr->is_double()) {
@@ skipping 3431 matching lines @@
   __ bind(deferred->exit());
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32