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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
| 4 | 4 |
| 5 #include "vm/code_generator.h" | 5 #include "vm/code_generator.h" |
| 6 | 6 |
| 7 #include "vm/assembler_macros.h" | 7 #include "vm/assembler_macros.h" |
| 8 #include "vm/ast.h" |
| 8 #include "vm/code_patcher.h" | 9 #include "vm/code_patcher.h" |
| 9 #include "vm/compiler.h" | 10 #include "vm/compiler.h" |
| 10 #include "vm/dart_api_impl.h" | 11 #include "vm/dart_api_impl.h" |
| 11 #include "vm/dart_entry.h" | 12 #include "vm/dart_entry.h" |
| 12 #include "vm/debugger.h" | 13 #include "vm/debugger.h" |
| 13 #include "vm/exceptions.h" | 14 #include "vm/exceptions.h" |
| 14 #include "vm/object_store.h" | 15 #include "vm/object_store.h" |
| 15 #include "vm/message.h" | 16 #include "vm/message.h" |
| 16 #include "vm/message_handler.h" | 17 #include "vm/message_handler.h" |
| 17 #include "vm/resolver.h" | 18 #include "vm/resolver.h" |
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| 28 DEFINE_FLAG(bool, trace_runtime_calls, false, "Trace runtime calls."); | 29 DEFINE_FLAG(bool, trace_runtime_calls, false, "Trace runtime calls."); |
| 29 DEFINE_FLAG(int, optimization_counter_threshold, 2000, | 30 DEFINE_FLAG(int, optimization_counter_threshold, 2000, |
| 30 "function's usage-counter value before it is optimized, -1 means never."); | 31 "function's usage-counter value before it is optimized, -1 means never."); |
| 31 DECLARE_FLAG(bool, enable_type_checks); | 32 DECLARE_FLAG(bool, enable_type_checks); |
| 32 DECLARE_FLAG(bool, trace_type_checks); | 33 DECLARE_FLAG(bool, trace_type_checks); |
| 33 DECLARE_FLAG(bool, report_usage_count); | 34 DECLARE_FLAG(bool, report_usage_count); |
| 34 DECLARE_FLAG(int, deoptimization_counter_threshold); | 35 DECLARE_FLAG(int, deoptimization_counter_threshold); |
| 35 DEFINE_FLAG(charp, optimization_filter, NULL, "Optimize only named function"); | 36 DEFINE_FLAG(charp, optimization_filter, NULL, "Optimize only named function"); |
| 36 | 37 |
| 37 | 38 |
| 38 bool CodeGenerator::CanOptimize() { | |
| 39 return | |
| 40 !FLAG_report_usage_count && | |
| 41 (FLAG_optimization_counter_threshold >= 0) && | |
| 42 !Isolate::Current()->debugger()->IsActive(); | |
| 43 } | |
| 44 | |
| 45 | |
| 46 const Array& CodeGenerator::ArgumentsDescriptor( | |
| 47 int num_arguments, | |
| 48 const Array& optional_arguments_names) { | |
| 49 const intptr_t num_named_args = | |
| 50 optional_arguments_names.IsNull() ? 0 : optional_arguments_names.Length(); | |
| 51 const intptr_t num_pos_args = num_arguments - num_named_args; | |
| 52 | |
| 53 // Build the argument descriptor array, which consists of the total number of | |
| 54 // arguments, the number of positional arguments, alphabetically sorted | |
| 55 // pairs of name/position, and a terminating null. | |
| 56 const int descriptor_len = 3 + (2 * num_named_args); | |
| 57 Array& descriptor = Array::ZoneHandle(Array::New(descriptor_len, Heap::kOld)); | |
| 58 | |
| 59 // Set total number of passed arguments. | |
| 60 descriptor.SetAt(0, Smi::Handle(Smi::New(num_arguments))); | |
| 61 // Set number of positional arguments. | |
| 62 descriptor.SetAt(1, Smi::Handle(Smi::New(num_pos_args))); | |
| 63 // Set alphabetically sorted pairs of name/position for named arguments. | |
| 64 String& name = String::Handle(); | |
| 65 Smi& pos = Smi::Handle(); | |
| 66 for (int i = 0; i < num_named_args; i++) { | |
| 67 name ^= optional_arguments_names.At(i); | |
| 68 pos = Smi::New(num_pos_args + i); | |
| 69 int j = i; | |
| 70 // Shift already inserted pairs with "larger" names. | |
| 71 String& name_j = String::Handle(); | |
| 72 Smi& pos_j = Smi::Handle(); | |
| 73 while (--j >= 0) { | |
| 74 name_j ^= descriptor.At(2 + (2 * j)); | |
| 75 const intptr_t result = name.CompareTo(name_j); | |
| 76 ASSERT(result != 0); // Duplicate argument names checked in parser. | |
| 77 if (result > 0) break; | |
| 78 pos_j ^= descriptor.At(3 + (2 * j)); | |
| 79 descriptor.SetAt(2 + (2 * (j + 1)), name_j); | |
| 80 descriptor.SetAt(3 + (2 * (j + 1)), pos_j); | |
| 81 } | |
| 82 // Insert pair in descriptor array. | |
| 83 descriptor.SetAt(2 + (2 * (j + 1)), name); | |
| 84 descriptor.SetAt(3 + (2 * (j + 1)), pos); | |
| 85 } | |
| 86 // Set terminating null. | |
| 87 descriptor.SetAt(descriptor_len - 1, Object::Handle()); | |
| 88 | |
| 89 // Share the immutable descriptor when possible by canonicalizing it. | |
| 90 descriptor.MakeImmutable(); | |
| 91 descriptor ^= descriptor.Canonicalize(); | |
| 92 return descriptor; | |
| 93 } | |
| 94 | |
| 95 | |
| 96 DEFINE_RUNTIME_ENTRY(TraceFunctionEntry, 1) { | 39 DEFINE_RUNTIME_ENTRY(TraceFunctionEntry, 1) { |
| 97 ASSERT(arguments.Count() == kTraceFunctionEntryRuntimeEntry.argument_count()); | 40 ASSERT(arguments.Count() == kTraceFunctionEntryRuntimeEntry.argument_count()); |
| 98 const Function& function = Function::CheckedHandle(arguments.At(0)); | 41 const Function& function = Function::CheckedHandle(arguments.At(0)); |
| 99 const String& function_name = String::Handle(function.name()); | 42 const String& function_name = String::Handle(function.name()); |
| 100 const String& class_name = | 43 const String& class_name = |
| 101 String::Handle(Class::Handle(function.owner()).Name()); | 44 String::Handle(Class::Handle(function.owner()).Name()); |
| 102 OS::Print("> Entering '%s.%s'\n", | 45 OS::Print("> Entering '%s.%s'\n", |
| 103 class_name.ToCString(), function_name.ToCString()); | 46 class_name.ToCString(), function_name.ToCString()); |
| 104 } | 47 } |
| 105 | 48 |
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| 1591 | 1534 |
| 1592 | 1535 |
| 1593 // Adds a pointer to the store buffer. | 1536 // Adds a pointer to the store buffer. |
| 1594 // ptr: the address of a field being stored into. | 1537 // ptr: the address of a field being stored into. |
| 1595 DEFINE_LEAF_RUNTIME_ENTRY(void, StoreBuffer, uword ptr) { | 1538 DEFINE_LEAF_RUNTIME_ENTRY(void, StoreBuffer, uword ptr) { |
| 1596 Isolate::Current()->store_buffer()->AddPointer(ptr); | 1539 Isolate::Current()->store_buffer()->AddPointer(ptr); |
| 1597 } | 1540 } |
| 1598 END_LEAF_RUNTIME_ENTRY | 1541 END_LEAF_RUNTIME_ENTRY |
| 1599 | 1542 |
| 1600 } // namespace dart | 1543 } // namespace dart |
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