Fix usage of csinc arm64 instruction in stubs (the 2nd operand is incremented).

runtime/vm/stub_code_arm64.cc

 // Copyright (c) 2014, 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"
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/assembler.h"
 #include "vm/compiler.h"
 #include "vm/dart_entry.h"
@@ skipping 597 matching lines @@
   __ LoadFieldFromOffset(R2, R4, ArgumentsDescriptor::count_offset());
   __ add(TMP, FP, Operand(R2, LSL, 2));  // R2 is Smi.
   __ LoadFromOffset(R6, TMP, kParamEndSlotFromFp * kWordSize);
   __ Push(ZR);  // Result slot.
   __ Push(R6);  // Receiver.
   __ Push(R5);  // ICData/MegamorphicCache.
   __ Push(R4);  // Arguments descriptor.
 
   // Adjust arguments count.
   __ LoadFieldFromOffset(R3, R4, ArgumentsDescriptor::type_args_len_offset());
-  __ AddImmediate(TMP, R2, Smi::RawValue(1));  // Include the type arguments.
+  __ AddImmediate(TMP, R2, 1);  // Include the type arguments.
   __ cmp(R3, Operand(0));
-  __ csinc(R2, R2, TMP, EQ);  // R2 <- (R3 == 0) ? R2 : TMP.
+  __ csinc(R2, R2, TMP, EQ);  // R2 <- (R3 == 0) ? R2 : TMP + 1 (R2 : R2 + 2).
 
   // R2: Smi-tagged arguments array length.
   PushArgumentsArray(assembler);
   const intptr_t kNumArgs = 4;
   __ CallRuntime(kInvokeNoSuchMethodDispatcherRuntimeEntry, kNumArgs);
   __ Drop(4);
   __ Pop(R0);  // Return value.
   __ LeaveStubFrame();
   __ ret();
 }
@@ skipping 631 matching lines @@
 
   // Push space for the return value.
   // Push the receiver.
   // Push arguments descriptor array.
   __ Push(ZR);
   __ Push(R6);
   __ Push(R4);
 
   // Adjust arguments count.
   __ LoadFieldFromOffset(R3, R4, ArgumentsDescriptor::type_args_len_offset());
-  __ AddImmediate(TMP, R2, Smi::RawValue(1));  // Include the type arguments.
+  __ AddImmediate(TMP, R2, 1);  // Include the type arguments.
   __ cmp(R3, Operand(0));
-  __ csinc(R2, R2, TMP, EQ);  // R2 <- (R3 == 0) ? R2 : TMP.
+  __ csinc(R2, R2, TMP, EQ);  // R2 <- (R3 == 0) ? R2 : TMP + 1 (R2 : R2 + 2).
 
   // R2: Smi-tagged arguments array length.
   PushArgumentsArray(assembler);
 
   const intptr_t kNumArgs = 3;
   __ CallRuntime(kInvokeClosureNoSuchMethodRuntimeEntry, kNumArgs);
   // noSuchMethod on closures always throws an error, so it will never return.
   __ brk(0);
 }
 
@@ skipping 1031 matching lines @@
   __ brk(0);
 }
 
 void StubCode::GenerateAsynchronousGapMarkerStub(Assembler* assembler) {
   __ brk(0);
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64