PolymorphicInstanceCall: eliminate duplicate printing of ICData; eliminate Smi class id loading if …

runtime/vm/intermediate_language_x64.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intermediate_language.h"
 
 #include "lib/error.h"
@@ skipping 2184 matching lines @@
                                  instance_call()->ArgumentCount(),
                                  instance_call()->argument_names(),
                                  locs());
     return;
   }
 
   // Load receiver into RAX.
   __ movq(RAX,
       Address(RSP, (instance_call()->ArgumentCount() - 1) * kWordSize));
   Label done;
-  __ movq(RDI, Immediate(kSmiCid));
-  __ testq(RAX, Immediate(kSmiTagMask));
-  __ j(ZERO, &done);
+  if (ic_data().GetReceiverClassIdAt(0) == kSmiCid) {
+    __ movq(RDI, Immediate(kSmiCid));
+    __ testq(RAX, Immediate(kSmiTagMask));
+    __ j(ZERO, &done, Assembler::kNearJump);
+  } else {
+    __ testq(RAX, Immediate(kSmiTagMask));
+    __ j(ZERO, deopt);
+  }
   __ LoadClassId(RDI, RAX);
   __ Bind(&done);
   compiler->EmitTestAndCall(ic_data(),
                             RDI,  // Class id register.
                             instance_call()->ArgumentCount(),
                             instance_call()->argument_names(),
                             deopt,
                             instance_call()->deopt_id(),
                             instance_call()->token_pos(),
                             locs());
@@ skipping 108 matching lines @@
     __ j(ABOVE_EQUAL, deopt);
   }
 }
 
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64