Precompilation: Generate instance calls as IC calls that can switch to Megamoprhic calls.

runtime/vm/code_patcher_mips.cc

Index: runtime/vm/code_patcher_mips.cc
diff --git a/runtime/vm/code_patcher_mips.cc b/runtime/vm/code_patcher_mips.cc
index 09b06a2f249f55e3cb8eb47bbddb69150294ee7c..4c8ab992fafd61062fb1a36ccd494d96d867d327 100644
--- a/runtime/vm/code_patcher_mips.cc
+++ b/runtime/vm/code_patcher_mips.cc
@@ -68,6 +68,19 @@ RawFunction* CodePatcher::GetUnoptimizedStaticCallAt(
 }
 
 
+void CodePatcher::PatchSwitchableCallAt(uword return_address,
+                                        const Code& code,
+                                        const ICData& ic_data,
+                                        const MegamorphicCache& cache,
+                                        const Code& lookup_stub) {
+  ASSERT(code.ContainsInstructionAt(return_address));
+  SwitchableCallPattern call(return_address, code);
+  ASSERT(call.cache() == ic_data.raw());
+  call.SetLookupStub(lookup_stub);
+  call.SetCache(cache);
+}
+
+
 void CodePatcher::PatchNativeCallAt(uword return_address,
                                     const Code& code,
                                     NativeFunction target,