Improve code generation for the HRandom instruction.

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index ac48b09af9c23219295064906f76b785f0bcf113..d9daaacca0bbbdbb29f79756ebb330d1ddf5524e 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -1613,9 +1613,13 @@ LInstruction* LChunkBuilder::DoPower(HPower* instr) {
 LInstruction* LChunkBuilder::DoRandom(HRandom* instr) {
   ASSERT(instr->representation().IsDouble());
   ASSERT(instr->global_object()->representation().IsTagged());
-  LOperand* global_object = UseFixed(instr->global_object(), arg_reg_1);
-  LRandom* result = new(zone()) LRandom(global_object);
-  return MarkAsCall(DefineFixedDouble(result, xmm1), instr);
+  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, xmm1);
 }