Support inlining and crankshaft optimization of Math.random.

src/hydrogen.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 5110 matching lines @@
           result = new(zone()) HMul(context, left, left);
         }
 
         if (result == NULL) {
           result = new(zone()) HPower(left, right);
         }
         ast_context()->ReturnInstruction(result, expr->id());
         return true;
       }
       break;
+    case kMathRandom:
+      if (argument_count == 1 && check_type == RECEIVER_MAP_CHECK) {
+        AddCheckConstantFunction(expr, receiver, receiver_map, true);
+        Drop(1);
+        HValue* context = environment()->LookupContext();
+        HGlobalObject* global_object = new(zone()) HGlobalObject(context);
+        AddInstruction(global_object);
+        HRandom* result = new(zone()) HRandom(global_object);
+        ast_context()->ReturnInstruction(result, expr->id());
+        return true;
+      }
+      break;
     default:
       // Not yet supported for inlining.
       break;
   }
   return false;
 }
 
 
 bool HGraphBuilder::TryCallApply(Call* expr) {
   Expression* callee = expr->expression();
@@ skipping 1427 matching lines @@
 
 
 void HGraphBuilder::GenerateLog(CallRuntime* call) {
   // %_Log is ignored in optimized code.
   return ast_context()->ReturnValue(graph()->GetConstantUndefined());
 }
 
 
 // Fast support for Math.random().
 void HGraphBuilder::GenerateRandomHeapNumber(CallRuntime* call) {
-  return Bailout("inlined runtime function: RandomHeapNumber");
+  HValue* context = environment()->LookupContext();
+  HGlobalObject* global_object = new(zone()) HGlobalObject(context);
+  AddInstruction(global_object);
+  HRandom* result = new(zone()) HRandom(global_object);
+  return ast_context()->ReturnInstruction(result, call->id());
 }
 
 
 // Fast support for StringAdd.
 void HGraphBuilder::GenerateStringAdd(CallRuntime* call) {
   ASSERT_EQ(2, call->arguments()->length());
   CHECK_ALIVE(VisitArgumentList(call->arguments()));
   HValue* context = environment()->LookupContext();
   HCallStub* result = new(zone()) HCallStub(context, CodeStub::StringAdd, 2);
   Drop(2);
@@ skipping 728 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal