Range feedback for binary integer operations.

runtime/vm/intermediate_language.cc

 // Copyright (c) 2013, 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/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/cpu.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_allocator.h"
@@ skipping 13 matching lines @@
 #include "vm/symbols.h"
 
 #include "vm/il_printer.h"
 
 namespace dart {
 
 DEFINE_FLAG(bool, propagate_ic_data, true,
     "Propagate IC data from unoptimized to optimized IC calls.");
 DEFINE_FLAG(bool, two_args_smi_icd, true,
     "Generate special IC stubs for two args Smi operations");
+DEFINE_FLAG(bool, ic_range_profiling, true,
+    "Generate special IC stubs collecting range information "
+    "for binary and unary arithmetic operations");
 DEFINE_FLAG(bool, unbox_numeric_fields, true,
     "Support unboxed double and float32x4 fields.");
 DECLARE_FLAG(bool, enable_type_checks);
 DECLARE_FLAG(bool, eliminate_type_checks);
 DECLARE_FLAG(bool, trace_optimization);
 DECLARE_FLAG(bool, trace_constant_propagation);
 DECLARE_FLAG(bool, throw_on_javascript_int_overflow);
 
 Definition::Definition(intptr_t deopt_id)
     : Instruction(deopt_id),
@@ skipping 2835 matching lines @@
             (class_ids[0] == kSmiCid) && (class_ids[1] == kSmiCid)) {
           is_smi_two_args_op = true;
         }
       }
     }
     if (is_smi_two_args_op) {
       ASSERT(ArgumentCount() == 2);
       ExternalLabel target_label(label_address);
       compiler->EmitInstanceCall(&target_label, *call_ic_data, ArgumentCount(),
                                  deopt_id(), token_pos(), locs());
+    } else if (FLAG_ic_range_profiling &&
+               (Token::IsBinaryArithmeticOperator(token_kind()) ||
+                Token::IsUnaryArithmeticOperator(token_kind()))) {
+      ASSERT(Token::IsUnaryArithmeticOperator(token_kind()) ==
+                 (ArgumentCount() == 1));
+      ASSERT(Token::IsBinaryArithmeticOperator(token_kind()) ==
+                 (ArgumentCount() == 2));
+      StubCode* stub_code = isolate->stub_code();
+      ExternalLabel target_label((ArgumentCount() == 1) ?
+          stub_code->UnaryRangeCollectingInlineCacheEntryPoint() :
+          stub_code->BinaryRangeCollectingInlineCacheEntryPoint());
+      compiler->EmitInstanceCall(&target_label, *call_ic_data, ArgumentCount(),
+                                 deopt_id(), token_pos(), locs());
     } else {
       compiler->GenerateInstanceCall(deopt_id(),
                                      token_pos(),
                                      ArgumentCount(),
                                      locs(),
                                      *call_ic_data);
     }
   }
 }
 
@@ skipping 571 matching lines @@
     case Token::kTRUNCDIV: return 0;
     case Token::kMOD: return 1;
     default: UNIMPLEMENTED(); return -1;
   }
 }
 
 
 #undef __
 
 }  // namespace dart