VM: Simplify irregexp entry stub.

runtime/vm/regexp.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/regexp.h"
 
 #include "vm/dart_entry.h"
 #include "vm/regexp_assembler.h"
 #include "vm/regexp_assembler_bytecode.h"
 #include "vm/regexp_assembler_ir.h"
@@ skipping 5257 matching lines @@
       false,  // Not native.
       owner,
       0));  // No token position.
 
   // TODO(zerny): Share these arrays between all irregexp functions.
   fn.set_num_fixed_parameters(kParamCount);
   fn.set_parameter_types(Array::Handle(zone, Array::New(kParamCount,
                                                            Heap::kOld)));
   fn.set_parameter_names(Array::Handle(zone, Array::New(kParamCount,
                                                            Heap::kOld)));
-  fn.SetParameterTypeAt(0, Type::Handle(zone, Type::DynamicType()));
-  fn.SetParameterNameAt(0, Symbols::string_param());
-  fn.SetParameterTypeAt(1, Type::Handle(zone, Type::DynamicType()));
-  fn.SetParameterNameAt(1, Symbols::start_index_param());
+  fn.SetParameterTypeAt(RegExpMacroAssembler::kParamRegExpIndex,
+                        Type::Handle(zone, Type::DynamicType()));
+  fn.SetParameterNameAt(RegExpMacroAssembler::kParamRegExpIndex,
+                        Symbols::This());
+  fn.SetParameterTypeAt(RegExpMacroAssembler::kParamStringIndex,
+                        Type::Handle(zone, Type::DynamicType()));
+  fn.SetParameterNameAt(RegExpMacroAssembler::kParamStringIndex,
+                        Symbols::string_param());
+  fn.SetParameterTypeAt(RegExpMacroAssembler::kParamStartOffsetIndex,
+                        Type::Handle(zone, Type::DynamicType()));
+  fn.SetParameterNameAt(RegExpMacroAssembler::kParamStartOffsetIndex,
+                        Symbols::start_index_param());
   fn.set_result_type(Type::Handle(zone, Type::ArrayType()));
 
   // Cache the result.
   regexp.set_function(specialization_cid, fn);
 
   fn.SetRegExpData(regexp, specialization_cid);
   fn.set_is_debuggable(false);
 
   // The function is compiled lazily during the first call.
 }
@@ skipping 26 matching lines @@
   CreateSpecializedFunction(zone, regexp, kOneByteStringCid, owner);
   CreateSpecializedFunction(zone, regexp, kTwoByteStringCid, owner);
   CreateSpecializedFunction(zone, regexp, kExternalOneByteStringCid, owner);
   CreateSpecializedFunction(zone, regexp, kExternalTwoByteStringCid, owner);
 
   return regexp.raw();
 }
 
 
 }  // namespace dart