When checking against non-parametrized types use a cache to hold result tuples (class, result). Tha…

runtime/vm/code_patcher_ia32.cc

Index: runtime/vm/code_patcher_ia32.cc
===================================================================
--- runtime/vm/code_patcher_ia32.cc	(revision 6245)
+++ runtime/vm/code_patcher_ia32.cc	(working copy)
@@ -259,6 +259,22 @@
   return DartCallPattern::kNumInstructions * DartCallPattern::kInstructionSize;
 }
 
+
+RawArray* CodePatcher::GetTypeTestArray(uword instruction_address) {
+  Array& result = Array::Handle();
+  uint32_t* target_addr = reinterpret_cast<uint32_t*>(instruction_address + 1);
+  result ^= reinterpret_cast<RawObject*>(*target_addr);
+  return result.raw();
+}
+
+
+void CodePatcher::SetTypeTestArray(uword instruction_address,
+                                   const Array& value) {
+  uint32_t* target_addr = reinterpret_cast<uint32_t*>(instruction_address + 1);
+  *target_addr = reinterpret_cast<uint32_t>(value.raw());
+}
+
+
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32