Optimize checked mode asserts with uninstantiated types and known constant type-arguments.

runtime/vm/flow_graph_compiler.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_XXX.
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
@@ skipping 555 matching lines @@
       DartEntry::ArgumentsDescriptor(argument_count, argument_names);
   EmitStaticCall(function, arguments_descriptor, argument_count,
                  deopt_id, token_pos, locs);
 }
 
 
 void FlowGraphCompiler::GenerateNumberTypeCheck(Register kClassIdReg,
                                                 const AbstractType& type,
                                                 Label* is_instance_lbl,
                                                 Label* is_not_instance_lbl) {
+  assembler()->Comment("NumberTypeCheck");
   GrowableArray<intptr_t> args;
   if (type.IsNumberType()) {
     args.Add(kDoubleCid);
     args.Add(kMintCid);
     args.Add(kBigintCid);
   } else if (type.IsIntType()) {
     args.Add(kMintCid);
     args.Add(kBigintCid);
   } else if (type.IsDoubleType()) {
     args.Add(kDoubleCid);
   }
   CheckClassIds(kClassIdReg, args, is_instance_lbl, is_not_instance_lbl);
 }
 
 
 void FlowGraphCompiler::GenerateStringTypeCheck(Register kClassIdReg,
                                                 Label* is_instance_lbl,
                                                 Label* is_not_instance_lbl) {
+  assembler()->Comment("StringTypeCheck");
   GrowableArray<intptr_t> args;
   args.Add(kOneByteStringCid);
   args.Add(kTwoByteStringCid);
   args.Add(kExternalOneByteStringCid);
   args.Add(kExternalTwoByteStringCid);
   CheckClassIds(kClassIdReg, args, is_instance_lbl, is_not_instance_lbl);
 }
 
 
 void FlowGraphCompiler::GenerateListTypeCheck(Register kClassIdReg,
                                               Label* is_instance_lbl) {
+  assembler()->Comment("ListTypeCheck");
   Label unknown;
   GrowableArray<intptr_t> args;
   args.Add(kArrayCid);
   args.Add(kGrowableObjectArrayCid);
   args.Add(kImmutableArrayCid);
   CheckClassIds(kClassIdReg, args, is_instance_lbl, &unknown);
   assembler()->Bind(&unknown);
 }
 
 
@@ skipping 383 matching lines @@
       return FieldAddress(array, index, TIMES_4, Float64Array::data_offset());
     case kUint8ArrayCid:
       return FieldAddress(array, index, TIMES_1, Uint8Array::data_offset());
     default:
       UNIMPLEMENTED();
       return FieldAddress(SPREG, 0);
   }
 }
 
 }  // namespace dart