Revert 17963, 17962 and 17955: Random number generator in JS changes

src/mips/lithium-mips.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 1622 matching lines @@
   LOperand* right = exponent_type.IsDouble() ?
       UseFixedDouble(instr->right(), f4) :
       UseFixed(instr->right(), a2);
   LPower* result = new(zone()) LPower(left, right);
   return MarkAsCall(DefineFixedDouble(result, f0),
                     instr,
                     CAN_DEOPTIMIZE_EAGERLY);
 }
 
 
+LInstruction* LChunkBuilder::DoRandom(HRandom* instr) {
+  ASSERT(instr->representation().IsDouble());
+  ASSERT(instr->global_object()->representation().IsTagged());
+  LOperand* global_object = UseTempRegister(instr->global_object());
+  LOperand* scratch = TempRegister();
+  LOperand* scratch2 = TempRegister();
+  LOperand* scratch3 = TempRegister();
+  LRandom* result = new(zone()) LRandom(
+      global_object, scratch, scratch2, scratch3);
+  return DefineFixedDouble(result, f0);
+}
+
+
 LInstruction* LChunkBuilder::DoCompareGeneric(HCompareGeneric* instr) {
   ASSERT(instr->left()->representation().IsTagged());
   ASSERT(instr->right()->representation().IsTagged());
   LOperand* context = UseFixed(instr->context(), cp);
   LOperand* left = UseFixed(instr->left(), a1);
   LOperand* right = UseFixed(instr->right(), a0);
   LCmpT* result = new(zone()) LCmpT(context, left, right);
   return MarkAsCall(DefineFixed(result, v0), instr);
 }
 
@@ skipping 935 matching lines @@
 
 
 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
   LOperand* object = UseRegister(instr->object());
   LOperand* index = UseRegister(instr->index());
   return DefineAsRegister(new(zone()) LLoadFieldByIndex(object, index));
 }
 
 
 } }  // namespace v8::internal