Deoptimization can occur at Dart calls (includes native calls to C) but not at runtime calls. This …

runtime/vm/object_test.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 "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
@@ skipping 2494 matching lines @@
   EXPECT_EQ(150, handlers.HandlerPC(5));
 }
 
 
 TEST_CASE(PcDescriptors) {
   const int kNumEntries = 6;
   // Add PcDescriptors to the code.
   PcDescriptors& descriptors = PcDescriptors::Handle();
   descriptors ^= PcDescriptors::New(kNumEntries);
   descriptors.AddDescriptor(0, 10, PcDescriptors::kOther, 1, 20, 1);
-  descriptors.AddDescriptor(1, 20, PcDescriptors::kDeopt, 2, 30, 0);
+  descriptors.AddDescriptor(1, 20, PcDescriptors::kDeoptBefore, 2, 30, 0);
   descriptors.AddDescriptor(2, 30, PcDescriptors::kOther, 3, 40, 1);
   descriptors.AddDescriptor(3, 10, PcDescriptors::kOther, 4, 40, 2);
   descriptors.AddDescriptor(4, 10, PcDescriptors::kOther, 5, 80, 3);
   descriptors.AddDescriptor(5, 80, PcDescriptors::kOther, 6, 150, 3);
 
   extern void GenerateIncrement(Assembler* assembler);
   Assembler _assembler_;
   GenerateIncrement(&_assembler_);
   Code& code = Code::Handle(Code::FinalizeCode(
       *CreateFunction("Test_Code"), &_assembler_));
   code.set_pc_descriptors(descriptors);
 
   // Verify the PcDescriptor entries by accessing them.
   const PcDescriptors& pc_descs = PcDescriptors::Handle(code.pc_descriptors());
   EXPECT_EQ(kNumEntries, pc_descs.Length());
   EXPECT_EQ(1, pc_descs.TryIndex(0));
   EXPECT_EQ(static_cast<uword>(10), pc_descs.PC(0));
   EXPECT_EQ(1, pc_descs.DeoptId(0));
   EXPECT_EQ(20, pc_descs.TokenPos(0));
   EXPECT_EQ(3, pc_descs.TryIndex(5));
   EXPECT_EQ(static_cast<uword>(80), pc_descs.PC(5));
   EXPECT_EQ(150, pc_descs.TokenPos(5));
   EXPECT_EQ(PcDescriptors::kOther, pc_descs.DescriptorKind(0));
-  EXPECT_EQ(PcDescriptors::kDeopt, pc_descs.DescriptorKind(1));
+  EXPECT_EQ(PcDescriptors::kDeoptBefore, pc_descs.DescriptorKind(1));
 }
 
 
 static RawClass* CreateTestClass(const char* name) {
   const String& class_name = String::Handle(Symbols::New(name));
   const Class& cls = Class::Handle(
       Class::New(class_name, Script::Handle(), Scanner::kDummyTokenIndex));
   return cls.raw();
 }
 
@@ skipping 554 matching lines @@
   isolate->heap()->CollectAllGarbage();
   EXPECT(weak1.key() == Object::null());
   EXPECT(weak1.value() == Object::null());
   EXPECT(weak2.key() == Object::null());
   EXPECT(weak2.value() == Object::null());
 }
 
 #endif  // defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64).
 
 }  // namespace dart